UV curable inks and use

Composition of UV curable inks mainly are photopolymerization prepolymer, photosensitive monomer, photopolymerization initiators, organic pigments and additives. Photoinitiators in inks is a compound vulnerable to light, after the absorption of light to stimulate free radicals, energy transferred to the light sensitive elements or photo-Crosslinking agents to make the UV ink occurs UV-curing reaction.

Different pigments have different characteristics to light absorption, reflection and scattering, so the degree of impediments to UV curing is different. Most pigments has certain transmission area in part UV light and visible range, it is called "spectral window" of this pigment. Photo-initiators in this window can fully absorption UV light radiant energy, therefore, make sure the window of location is very important to the selection of right of photo-initiators. In other words, photoinitiator should match with pigment in ink system, and it is in the range of the pigments on the weak absorption wavelength of UV light. So, the use of UV inks should careful observation the relations of pigment and UV absorption spectrum.

Prepolymer

Prepolymer is the most important component of the UV ink, its performance on the nature of the curing process and the curing membrane plays a decisive role. Most commonly used oligomers in UV-curing inks are epoxy acrylate, urethane, polyester acrylic acid, alkali-soluble acrylic resin and so on.

Reactive diluent

Reactive diluents are also called Crosslinking monomer. It is a kind of unsaturated groups (such as the double bond) of small molecules compounds. It can cross-linked with oligomer under light and its molecular weight of about hundreds of thousands of. Add reactive diluent to viscous prepolymer is to regulate the viscosity of UV-curable inks, control curing crosslinking density of UV-curable ink and improved physical and mechanical properties of the cured film, such as flexibility and hardness. There are several commonly used diluent: triethylene glycol diacrylate (TPGDA), three shrink tetraethylene glycol dimethyl acrylate (TEGDA), trimethylol triacrylate (TMPTA).

Photo-initiators



Photo-initiator is the main component of any UV curing system, usually it breaks down into free radicals and induced polymerization and cross-linking at a wavelength of 200~400nm. Add a small amount of photopolymerization initiators in ink and exposed to UV light. UV-curable inks photoinitiator generally can be divided into crack initiator, hydrogen-initiator and cationic photoinitiators.

Polymerization inhibitor

Inhibitor is an substance that can rapidly function with free radicals, slows or inhibits undesired chemical reaction. It used to prolong the storage period of certain monomers and resins, also known as polymerization terminator, it includes the inhibitor and the agents. The commonly used inhibitors are hydroquinone, p-methoxy phenol, etc.

Organic pigments and additives

Pigments also plays a significant role in the UV ink, it also has a direct impact on the characteristics of the ink. According to their origin and chemical composition, it is divided into organic and inorganic pigments. Ink additives are used to adjust the ink and make it suitable to different printing conditions of auxiliary materials. There are many kinds of ink additives. The commonly used are the withdraw of the adhesive, sub light agent, drying agent, anti-drier, diluent, rubbing agent, varnish oil, varnish, etc. If you have interest in UV curable inks and the commonly used chemicals, please click here!
Source: https://www.okchem.com/news/uv-curable-inks-use.html

Plasticizers for plastic raw materials

Plasticizers is a high boiling point and low volatility of the material. Its molecular structure has polar and non-polar parts. Plasticizer molecules can be inserted between the polymer chains to weaken the intermolecular forces and increase the distance and space between the molecular chains of polymers, as well as increase polymer plastic and reduce the processing temperature of the polymer.

Several of main chemical raw materials to manufacture plasticizers are follows:

O-phthalic acid esters is the most widely used plasticizer. Currently, the production of O-phthalic acid esters is about accounted for 80% of total plasticizer. As the full performance, it general are used as main plasticizer. DOP, DIOP, DIDP, DBP, etc are the common used O-phthalic acid esters, while the use of DOP is most wide and production is also maximum.



1 DOP The plasticizer Di-n-Octyl phthalate is colorless or light yellow oil-like liquid. It is not dissolved in water and can used in most organic solvent and hydrocarbon class. This plasticizer has a good compatibility with PVC, chlorine-vinegar resin, polystyrene, methyl acrylic acid methyl ester and and cellulose. Due to its excellent plasticizing efficiency, small volatile and migration, cold resistance, resistant to UV light, water resistance, soft and electric performance, it mainly used for Plasticized of PVC, fiber, etc.

2 DBP Dibutyl phthalate is colorless oily liquid without visible impurities, with aromatic smell, soluble in diethyl ether, alcohol and other oil compatibility. DBP is a commonly used plasticizer. It is also used as an additive to adhesives or printing inks. It is also used as an ectoparasiticide. By the way, it soluble in most organic solvents and hydrocarbons.

3 DIOP It is transparent oil-like viscous liquid, insoluble in water, but can dissolved into most organic solvent. It has good compatible property with nitric acid fiber, ethyl cellulose, PVC, chlorine-vinegar resin, etc. Small toxicity and better light and hot stability, but the plasticizing efficiency, electrical properties, low temperature flexibility and non-volatile is slightly poorer than DOP. DIOP can be DOP alternative, as well as used as main plasticizer of PVC, vinyl chloride copolymers, fiber plastic resin and so on.

4 DIDP It can be dissolved in alcohol, ketone and ether. Compatibility with nitric acid fiber, ethyl cellulose, PVC and chlorine-vinegar resin is good. It's available for vinyl base resin and fiber plastic resin of main plasticizer. The products plasticized by this chemical, the soft changes small with temperature. It especially suitable for wire and cable sheath, thin model for agricultural use and so on. When it used for plastic pots can improve its liquidity, viscosity changes small when in the storage. If you have interest in plastic raw materials, please click here!

Source: https://www.okchem.com/news/plasticizers-plastic-raw-materials.html

 

Uses of sodium benzoate preservative

As one of important food additive, preservatives is widely used in the food industry. Sodium benzoate preservative is generally contained in soy sauce; bread and beans often add preservative Calcium propionate; potassium sorbate is often applied to pickles, jams, condiments and drinks; traditional corrosion of fruit wine uses sulfites. As a result, preservatives is widely used in the food and our daily consumption. But here OKCHEM would like to introduce preservative sodium benzoate.

Sodium benzoate mostly are white particles and easy dissolved in water. It is acid preservatives and has no bactericidal, bacteriostatic effect in alkaline media. Its best anti-corrosion PH is 2.5-4.0, 5% of solution sterilization effect in PH5.0 is not very good.



Because of the large lipophilic, sodium benzoate is easily penetrates the cell membrane into the cell body, so that to interfere permeability of cell membrane and inhibition absorption of membrane to amino acids; it ionization acidification the intracellular alkaline reserve when into the cell body, as well as inhibits the activity of respiratory enzymes of cells and prevents condensation reaction of Acetyl-Coenzyme, then it reaches a purpose of food preservation.

Here are some uses of sodium benzoate:

1 Mainly used as food preservatives, also used for making drugs, dyes, etc.

2 For the pharmaceutical industry and plant genetic research, also used as dye intermediates, disinfectants and preservatives.

3 Preservative; antimicrobial agents.

4 It is an important acid-preservative and can also be used as feed preservatives.

5 The product is used as a food additive preservative, pharmaceutical industry sterilization agent, mordant in dyes industry, plasticizer in plastics industry, also used as intermediates of organic synthesis in culinary herbs.

6 Used as a solvent of serum bilirubin test.

Benzoic acid and sodium benzoate as a preservative is widely used in food processing and preservation. Due to benzoic acid can play a role in the free state, so it performance good in acid foods.

Benzoate is often used in carbonated beverages, sauces, sauce, candied fruit and vegetable drinks, etc. Benzoic acid in soy sauce, beverages can be efficiency when used together with the p-hydroxy benzoic acid esters. Benzoic acid and sodium benzoate is often used to preserve high acid fruits, jams, beverage syrup and other acidic foods. If you have interest in sodium benzoate and other food preservatives, please click here or visit www.okchem.com!
Source: https://www.okchem.com/news/uses-sodium-benzoate-preservative.html

Flame retardant TPE for uses

Here are many characteristics of TPE:

1 Has excellent flexibility and suppleness, flexibility, high strength, smooth touch and non-stick dust.

2 Excellent flame retardant: the excellent flame retardant properties can reach UL94 V0 V1 level.

3 Good physical properties, high and low temperature resistance:-50 ° c-125.

4 UV-resistant, anti-aging, acid, fatigue resistance.

5 light weight, easy processing, good mobility, easy coloring. Suitable for extrusion extrusion molding.



TPE (Thermoplastic Elastomer) has high elasticity of rubber, high strength, high elasticity and injection molding of the material. With a nontoxic security, wide range of hardness, good coloring, soft texture, weather-resistance, fatigue resistance, temperature resistance, excellent processing performance and not curing. It can be recycled to reduce costs. It not only secondary injection molding, coating and adhesion with PP, PE, PC, PS, ABS material, but also separately molded.

Thermoplastic elastomers both have thermoplastic processability and physical properties of Vulcanized rubber. It is the combination of advantages of plastic and rubber.

General compounding system of TPE (based on SEBS base material), its flame retardant level is HB. But with application field expand, requirements on TPE of performance increasingly. The appearance of flame retardant TPE makes TPE has a mature application in electronic material, wire cable and other fields. In traditional process, halogen is the key raw materials to flame retardant. But halogen releases out dioxin gases when burning, which causes big pollution on environment.

Common application of halogen-free flame retardant TPE:

Transparency series: ordinary clear toys, sports equipments, high-grade& high transparency toys, adult products, cupula, seals and other product. This chemicals has better transparency, flexibility and lower price. Wide range of hardness, from super soft to 90A. It is widely used in adult products for the excellent transparency, gloss and comfortable feel. With good UV and weather resistance, high temperature resistance, it can be used outdoors for a long time.

Shoot stick series: due to its excellent feel and bond firm with hard plastic ABS, PC, PC/ABS, PA6, PA66 etc, it is applied to home appliances casing, handle, grips and other field. Anti-skid and easy coloring and processing makes it has a wide range of design space.

The application of oil series includes all kinds of coated toys, daily necessities, widely replacing PVC. It is safety, environmental protection and easy oiled. This product has features of good shock absorption, resistance to compression, electric insulation, steel, etc. If you have interest in halogen-free flame retardant TPE and other halogen-free flame-retardants, please click here for more here!
Source: https://www.okchem.com/news/flame-retardant-tpe-uses.html

Uses of flame retardant TPU

Wire and cable industry is one of the important application field of TPU thermoplastic elastomers. Most of the industry product applications for TPU flame retardancy have higher requirements, TPU flame retardant will tend to normalize as TPU gradually applied.

At present, flame retardant TPU applied in wire and cable industry most require halogen-free. With the expand application of TPU in cable industry, it can be predicted that the needs of halogen-free flame resistant TPU material will further increase.



Compared to other traditional cable materials, TPU has many advantages. Halogen-free flame retardant is green and compliance with ROHS requirements. It can be processed during 180~220℃. TPU process is the most convenient and energy saving.

TPU combines the characteristics of plastic and rubber, known as the "third generation of synthetic rubber". TPU material can replace PVC and used as insulating materials of wire and cable. presently, it is used in areas of low-temperature, ageing resistance and high-end consumer electronics such as cable, headphone cable, electronic cable, power cable, signal cable.

Thermoplastic polyurethane elastomers (TPU) has a very good mechanical properties, good wear resistance, solvent resistance, high and low temperature resistant properties and so on. It is an ideal wire and cable coating materials.

Flame retardant TPU applies to injection, extrusion and blow plastic forming of General products. This class products need requirements to TPU are high mechanical strength and good forming. Even forming time is long in extrusion forming, the series grades do not appear crystal phenomenon. Its main application including casters, heel, button, pneumatic tube, corrugated tube and other wear-resistant products.

In the construction industry, flame retardant TPU is found in the energy cables construction machines. Its other applications extend to pharmaceuticals, railways, airport equipment, rigs, nuclear power, solar and wind power generators, household goods and other industries.

TPU can be used in harsh environmental conditions, for example, in areas of extreme cold, towing cable and sheathed seismic streamers of industrial robots. Even under very harsh conditions, TPU cables are durable. Compared to other chemicals, properties of TPU is very generic. If you have interest in flame retardant TPU or other flame retardant, please click here to get more details, thanks!
Source:https://www.okchem.com/news/uses-flame-retardant-tpu.html

Knowledge of fluorescent pigments

Fluorescence phenomenon is a process of photoluminescence. In this process, the short-wavelength electromagnetic waves in ultraviolet or visible light after being absorbed, it is released in the form of long-wavelength electromagnetic wave. They usually fall in the visible light range and overlay with regular reflection of light, therefore it shows dazzling bright fluorescent colors.

Fluorescent pigments tend to be applied to those who need extra dramatic situations and locations. Research to children and adults shows that, compared to using traditional colors of similar products, using a fluorescent color product attract their attention and hold the attention of even longer.



Fluorescent pigments is nontoxic and functional luminescent pigments. The differs from general pigments is that it can absorb a certain form of energy and excite photons when light (including ultraviolet) radiation, it releases absorbed energy in the form of low visible light, so as to produce different color fluorescence phenomenon.

The combination of different colours and light to form the unusual bright colors, the luminous phenomena disappears when the light stops after irradiation, so they are called fluorescent pigments. Fluorescent pigments matched with polymer resin binder, solvents and additives, by grinding can get fluorescent ink.

Fluorescent pigment is organic complexes with high luminance. Usually it is colorless or pale white. Under radiation of UV (200nm~400nm), it shows a variety of colors of visible light (400nm~800nm). According to the wavelength of the excitation light source, it can be divided into UV-excited fluorescence pigment (excitation wavelength of 254nm) and UVA stimulate pigment (excitation wavelength is 365nm). The pigments do not contain any radioactive elements and toxic heavy metals. Therefore, it is nonpoisonous, harmless and safe to human. It is a new generation of green fluorescent pigment.

The difference between fluorescent pigments and traditional pigments are not only in color, but also in chemistry. Traditional pigments can be organic or inorganic substances with extremely low solubility. Their dispersion usually require strong shear and their particles are usually opaque. Strictly speaking, daylight fluorescent pigments is fluorescent dye in a brittle polymer resin to form solid solutions. Latter are ground into fine powder and into pigments or coloring agents. Its characteristics of solid solution makes it transparent in application. If you have interest in fluorescent pigments , please click here to get more information about this chemicals.
Source: https://www.okchem.com/news/knowledge-fluorescent-pigments.html

Mainly uses of xanthan gum

By controlling the rheological behavior of xanthan gum, it significantly improve food texture, taste and appearance, increase their commercial value. Xanthan gum as an important stabilizer, suspending agent, emulsifier, thickener, binder and raw materials with high added value and high quality used in beverages, cakes, jellies, canned foods, seafood, meat processing and other fields.



Xanthan gum used for baking roast food such as bread and cake can improve water retention and soft in baking roast and storage period, so that to improve taste and extended shelf period; It improves water holding capacity in meat products; it plays thickening and stable food structure role in frozen food; add xanthan gum to the jam can improve the texture, water retention and improve the quality of the product; when applied to beverage, xanthan gum can thicken, suspension to make it has smooth texture and natural flavor; compound xanthan gum with sophora bean gum and guar gum in ice cream and dairy products enables product stability; xanthan gum and carrageenan, Sophora bean gum and other compound is also used in jellies and candy processing.

Xanthan gum is produced by wild microorganisms of the genus Xanthomonas bacteria fermentation, and makes the corn syrup and the other three sugar fermentation. Bacteria fed with corn syrup to form a sticky substance called xanthan gum. It can be as a substitute for those allergic to gluten used in processed foods.
Xanthan gum in food thickening dairy products and salad. It is also used to keep ice cream mold and makes low-fat and fat-free dairy products becomes more energetic.

Besides, xanthan gum is gluten flour substitute. Non-food uses of xanthan gum is often used for beauty products to maintain separation of emulsion products. Also xanthan gum promotes water absorption of the skin, thus it used for different moisturizers. Requires smooth emulsion of any product can use it. A common use for it is used as a thickening agent for water used for water as a lubricant for machinery and equipment. If you have interest in thickeners such as xanthan gum and other food additves, please click here thanks!
Source: https://www.okchem.com/news/mainly-uses-xanthan-gum.html

Sodium Carboxymethyl Cellulose (CMC) in food industry

Sodium Carboxymethyl Cellulose (CMC) is the most widely used and the largest amount of cellulose type in the world. It is carboxymethyl derivatives of cellulose, also known as cellulose gum, is the most important Ionic cellulose gum.

There is food grade and industrial grade CMC. The actual substitution degree of CMC is between 0.4~1.5, and food grade substitution is 0.6~0.95, recently revised European legislation allows the DS in the CMC up to 1.5 used in food. Degree of substitution increases, and transparency and stability of the solution is also better.



CMC-Na is a white fibrous or granular powder, odorless, tasteless, hygroscopicity, easy to disperse in the water form a transparent colloidal solutions. Sodium carboxy methyl cellulose is a thickening agent. because of its good features so that it has been widely used in food industry. To some extent, it has promote the rapid and healthy development of the food industry.

Due to its thickening emulsifying role, it can stable acid milk beverage and can increased sticky of yogurt system; due to its hydrophilic and rehydration, it can be used for the improvement of bread and other pasta food quality, extend the shelf life of pasta products and improve the texture; because of its gel effect, therefore it can be used to make jellies and jams; it can also be used as edible coating material, compounded with other thickeners, smearing on the surface of some foods may be best to keep food fresh. As it is edible materials, it not have any adverse impact on human health. Therefore, as an ideal food additives, CMC-Na used very common in the food industry.

As to the thickening and emulsifying stability, food grade sodium carboxy methyl cellulose has emulsifying and stability on protein drinks. Generally, characteristics of fats beverages contain different levels of fat and some protein, easy to separate floating in storage to affect the appearance of the product. Besides, protein is easy to separate, particularly the products with low pH value, protein condensation, and CMC-Na can be an effective solution to these problems. It is transparent and stable colloidal dissolved in the water, and can stabilize the protein. At the same time, it reduces the surface tension between the water and fat, so it can make the fat fully emulsified. If you interest in CMC, please read more here.
Source:https://www.okchem.com/news/sodium-carboxymethyl-cellulose-cmc-food-industry.html

Use of folic acid

Folic acid is one of the B vitamins, which is used as a supplement by women to prevent neural tube defects (NTDs) developing during pregnancy. Its another form is known as folate. It can treat anemia caused by folic acid deficiency. Long term supplementation reduce the risk of stroke and cardiovascular disease.

Application of folic acid (folate) are as follows:

1 Food industry: used in dairy foods, meat food, baked goods, flour foods, sauces, etc.

2 Medicine: health food, fillers, pharmaceutical raw materials.

3 Industrial manufacturing: oil industry, manufacturing industry, agricultural products, battery, precision casting, and so on.

4 Tobacco products: instead of glycerol as tobacco flavoring, antifreeze moisturizer.

5 Cosmetics: facial creams, beauty creams, lotions, shampoos, facial mask.

6 Feed: pet cans, animal feed, fish feed, vitamins, feed, veterinary products, etc.





The intention of adding folic acid to flour is to promote public health through increasing blood folate levels in the populace. That is a process of folic acid fortification. Food is fortified with folic acid in the USA, only one of the many naturally occurring forms of folate, as well as a substance contributing only a minor amount to the folates in natural foods.

Folic acid is necessary when body is in the utilization of sugars and amino acids, also is necessary for cell growth and reproduction. Folic acid works in the form of tetrahydrofolate in the body, tetrahydro-folate involved in purine nucleotide and pyrimidine nucleotide synthesis and transformation in the body.

Folic acid plays an important role in the manufacturing of nucleic acids (RNA and DNA). It helps the metabolism of protein, promotes red blood cell production and maturation with vitamin B12, as well as an indispensable material of producing blood cells. Folic acid also as Lactobacillus casei works to promote multiplication factor and other microorganisms.

Folic acid plays an important role in cell division and growth and nucleic acids, amino acids, protein synthesis. The lack of folic acid can result in abnormal red blood cells, increase of immature cells, anemia and leukopenia. Folic acid is essential nutrient for fetal growth. Pregnant women lack of folic acid can cause low fetal birth weight gain, cleft lip and palate, heart defects, and so on. If you interest in folic acid, view more here!
Source: https://www.okchem.com/news/use-folic-acid.html

Sodium hexameta phosphate (SHMP) in many field

Sodium hexameta phosphate (SHMP) is widely used in paper production, textile, dyeing, petroleum, chemistry, metallurgy and construction materials etc, as water softener, flotation selecting agent, disperser and high temperature adhesive; In food industry it used as an additive, nourishing agent, quality improver, PH regulator, metal ions chelating agent, adhesive and levening agent etc.



Sodium salt is the largest production and most consumption products in fine phosphorus chemical products, and sodium hexameta phosphate is the market largest use amount of function of phosphate.

It is white powder, soluble in water but insoluble in organic solvent; It may form soluble chelates with ions of Ca, Ba, Mg, Cu, Fe etc. and is a good water treatment chemical.

In the food industry, sodium hexameta phosphate used as food quality improver, pH regulator, metal ions chelating agent, adhesive agent and expansive agent. Sodium hexameta phosphate for meat, fish intestinal and ham can improve holding water, increase knot and prevent fat oxidation; when for soy sauce it can prevent color, increase sticky, shorten fermentation period and regulation taste; it can improve out juice rate and viscosity, inhibit vitamin c decomposition when used in fruit beverage and cool beverage; this also improve expansion capacity, increases volume, enhance emulsion role and prevent cream body damage for ice cream; it prevent dairy products and beverage from gel precipitation; add it to beer can clarify wine, prevent pollution; as for beans, canned fruits and vegetables, it stabilize natural pigment and keep food color; it improves corrosion resistance when sprayed on the pickled meat.

Application in mineral processing and oil industry, sodium hexameta phosphate is a commonly used inhibitors of flotation. It mainly used to inhibit silica and silicate minerals, and carbonate minerals such as calcite, limestone. In addition, sodium hexameta phosphate also play the role of dispersant in flotation. In the nickel ore flotation process, after hauling mud cover on the surface of pentlandite, this is very negative to the flotation process. So, add a certain amount of this product is very favorable to pentlandite flotation recovery. Because the add of sodium hexametaphosphate makes flotation pulp disperse and reduce the surface covering of the serpentine in pentlandite.

In the oil industry, it as a drilling mud additives can avoid polyvalent metal ions precipitate, improve the ability of mud salt resistance and reduce mud water loss.
Hexametaphosphate applied to fiber industry can inhibit the generation of metal SOAP in the refining process; prevent the decomposition of hydrogen peroxide in the bleaching process; it can prevent color changes in dyeing; in paper making, the mix of sodium hexametaphosphate and sulfonation of benzene formaldehyde can be used to steel paper coating dispersant; etc. If you have interest to s odium hexameta phosphate (SHMP) and other food additives, please click here to get more, hope this is helpful to you, thanks!
Source: https://www.okchem.com/news/sodium-hexameta-phosphate-shmp-many-field.html

Sucralose uses as a sweetener

Sucralose is white powder and can dissolve easily in water, ethanol and methanol. It is about 600 times as sweet as sugar and tastes like sugar. Sucralose will not be regarded as a carbohydrate by the body. It has extremely low chances of absorption by the body. Therefore, sucralose does not provide any energy and is also suitable for people with diabetes to eat.



After a safety assessment, Health Canada's Food Directorate consider sucralose as a sweetener food additive for supplemental soup has no food safety risk. It is already permitted for use in Canada as a sweetener in a wide variety of foods at various maximum levels of use. On October 6, 2016, the publication of the European Commission (EU) 2016/1776 regulations, amending European Parliament and Council Regulation (EC) No 1333/2008, annex II, allowing sucralose (E 955) add to sugars or polyols as flavor enhancers used in chewing gum. The maximum limit for use is 1200mg/kg.

Compared with other sweeteners, it has many incomparable advantages:

• High sweetness, 600-650 times as sweet as sugar
• Pure taste, no smell or bitter taste, sweet curves almost overlap with sucrose, which is unmatched by any other sweetener.
• Absolute security, ADI is 15mg/kg, no safety and toxicological problem.
• Extremely low heat value, do not cause obesity, people with diabetes, cardiovascular and cerebrovascular diseases patients and the elderly can eat it.
• Does not cause blood sugar fluctuations, and for people with diabetes to eat.
• Do not cause dental cavities.
• Has good solubility and stability, acid and alkali resistance, high temperature resistance, long shelf life. From acidic to neutral food, it has a dilution effect to sour and salty; It has a masking effects on the astringent, bitter, alcohol, and other unpleasant taste; it is synergies for chili, milk flavor; etc.

As a result, this product is the most ideal sweetener available for children, adolescents, youth, middle age, old age and patients with various diseases. There is no nutrition questions. If you have interest to sucralose and other food additives, please click here to get more, hope this can help you, thanks!
Source: https://www.okchem.com/news/sucralose-uses-sweetener.html

Soy sauce powder uses in food industry

Soy sauce powder is also known as powdered soy sauce. It is a brown colored solid powder based on fresh soy sauce as the basic raw material, also add other auxiliary materials. Through the processes of flavor blending, color matching, freshness adjustment and spray drying to be produced into a solid soy sauce.



It retains the maximum normal fermentation aromas of fermentation itself and overcome the ordinary smell of soy sauce and the smell of oxidation.Its good reconstitution property, rich flavor, attractive color, remarkable effect for seasoning and easy for shipping lead the Soy Sauce Powder to be applied to different areas for seasoning food manufacture.

There are some advantages of soy sauce powder:

1 It has a strong sense of extended and substitute MSG, meat extract powder, meat powder, partial substitution I+G and yeast extract.

2 Good rehydration Performance.

3 Easy to use, no restrictions on use and can mix use with other products. It has meat flavor and rich, delicious taste.

The Package of soy sauce powder in OKCHEM is 5kg×4bags per bag (Paper-plastic bag), and it should store in a cool, dark and dry place.

As to applications, here are some introduction about this seasoning:

It can be mix up with other food material or add other material directly or by sprinkle when in puffed food, vegetable and snack, then it tastes refreshing and delicious, pleasant roasted notes and natural taste;

When used as instant food seasoning, such as noodles, porridge, instant noodles, it can be used after mixing up with other seasoning. This makes food fragrance more rich and nice natural mellow taste, good flavor and taste;

Add it directly to essence of chicken and beef Chicken liquid and chicken powder to remove odors and add aroma;

Mix up with other seasoning and then sprinkle to gain natural tastes;

About meat products, aquatic products and pickles products, add it directly when stir or mix up with other seasoning or add it after mixing up with other seasoning;

This makes cooked food has mellow taste and remove odors, as well as have specific smelling of sauce and a traditional tastes. It is mellow and delicate in flavor, fresh and sweet in aftertaste. If you have interest to soy sauce powder and other food additives and food ingredients, please click here, hope this can help you, thanks!
Source: https://www.okchem.com/news/soy-sauce-powder-uses-food-industry.html

Something about Halogen-free flame retardant

Polymers flame retardant can be divided into halogen and halogen-free two categories. The serious disadvantages of halogen flame retardant is that it reduces UV stability of flame retardant polymer substrate. It burns to produce more smoke, toxic gases, corrosive gases, and halogen flame retardants generally use with antimony trioxide together, therefore, smoke and toxic gases generate more.

In the research and application of fire retardant materials, people have gradually realized that smoke suppression and flame retardancy of equal importance. But for some materials, smoke suppression even more important than flame retardant, such as widely used materials PVC.



There are variety of halogen-free flame retardant. According to the types of flame retardant elements, they are often divided into magnesium-aluminum, phosphorus, nitrogen, phosphorus-nitrogen, Silicon, antimony, boron, molybdenum and graphite etc. Currently, consumption of halogen-free flame retardant in industry mainly are phosphorus (phosphonic) acid (includes halogen-containing derivative), zinc Borate, hydroxide, magnesium hydroxide, red phosphorus and antimony trioxide. Flame retardants are one of the most important polymer processing additives.

DOPO derivatives of its phenolic hydroxy or amino derivatives can be used as curing agent for polymers. They cured epoxy resin are very different from brominated epoxy resins, especially in flame retardant, thermal stability. Today's research and development of organic phosphorus compounds have a rapid development from chain-like structure to the ring. Such as phosphine phenanthrene compounds - DOPO and its derivatives has been paid attention due to its unique molecular structure (benzene and phenanthrene ring structure) and and have shown a great deal of excellent performance. So flame retardant DOPO derivative applications are great. Due to DOPO derivatives Ⅲ has two phenolic hydroxyl group, it can also be used as a curing agent for epoxy resin. Compared with TBBA for traditional curing epoxy, epoxy resin cured by it, Tg in General 40 ℃ higher, Td and charring rate is also higher. No trickle down and produce black smoke during combustion phenomenon, so it is very suitable as a circuit board substrates. If you have interest, read more here, thanks!
Source: https://www.okchem.com/news/something-halogen-free-flame-retardant.html

Halogen-free flame retardant development

Halogen-free flame retardant is one of the fastest growing additives material, it enables the non-fire-retardant materials equip with flame retardant properties. It does not burn easily or to extinguish under certain conditions. As halogen-free flame retardant technology advances, there are more and more kinds of halogen-free flame retardants, whose performance has been significantly improved.

Its flame retardant effect can be of two types: slow down the fire and stop the fire from spreading, by way of multiple effects principle suppress the combustion reaction; let the surface foam quickly expands and carbonation to form a protective. With the improvement of people's awareness of environmental protection and safety awareness, halogen-free flame retardant will have greater development in the future.




Halogen-free flame retardant additive mainly are phosphorus compounds and metal hydroxides. No corrosive gases and no volatile when burned makes these two compounds known as environment-friendly flame retardant. Besides, silicone flame retardants and nitrogen flame retardant and other several new types of non-halogen flame retardant. These new types of halogen-free flame retardants are new products in line with international standards.

The demand of halogen-free phosphorus flame retardant is increasing. Ammonium Polyphosphate is an important added inorganic halogen-free flame retardant. It contains large amount of phosphorus and nitrogen, good thermal stability, cheaper, less toxic, near-neutral and can be mixed with other halogen-free flame retardant. As a result, it is widely used in various fields.

However, due to its chemical structure, it has strong Hygroscopicity. At the same time, it will be ion separation and reduce the flame retardant efficiency under high temperature and high humidity. And add APP in the organic material will reduce the mechanical strength of the material itself, as well as its normal use. Although modification methods can strengthen APP combined with the organic substrate, reducing the effect on the mechanical properties of the substrate, but regardless of the method it only applies to the portion of the flame retardant material, it cannot be universally applied. Therefore, surface modification can just for only one or one type of material.

While raising the degree of polymerization of the APP will fundamentally solve the moisture problem. So production of high degree of polymerization of the APP is the direction of the current. In view of this, it should increase high degree of polymerization synthesis APP technology research and development. Also it should take into account waste gas treatment and expand the scale of production.

In addition, a variety of techniques are applied for the modification to APP to improve its thermal stability, compatibility with resins, reduce its moisture absorption, etc. According to substrates and different areas of application to develop series, dedicated APP products to meet the needs of different consumers. View more about OKCHEM!
Source: https://www.okchem.com/news/halogen-free-flame-retardant-development.html

Nitrogen and Nitrogen-phosphorous flame retardants

Nitrogen flame retardant

Study on nitrogen flame retardant agent started late and mainly are additives type. The commonly used nitrogen flame retardants are melamine, Melamine cyanurate (MCA). As a new type of high efficient nitrogen flame retardants, they are high efficiency, low toxicity, good heat resistance. Due to the high thermal decomposition temperature, do not worry about materials make flame retardant decomposition and cause failure of flame retardant in the manufacturing. Besides, nitrogen-containing compounds break down produce low corrosion of gas. The polymer materials treated by nitrogen flame retardant has low fuming amount, it shows very good smoke suppression effects.



Effect of the nitrogen flame retardants in the decomposition temperature is reached, it produces gases such as CO2, NH3, N2 and H2O. On one hand, it reduces the air oxygen and the combustible gas concentration when polymer heated to decomposition, this slows down burning rate. One the other hand, noncombustible gases takes away some of the heat, reduce the surface temperature of the polymer, thereby preventing burning.

Its efficiency of flame retardants is not high, availability is not strong and it needs to compound use with other flame retardants when melamine use alone. Through several flame retardants produce synergy to improve the efficiency of flame retardant. Typically, melamine compound use with ammonium Polyphosphate, Pentaerythritol.

Nitrogen-phosphorous flame retardants

Nitrogen-phosphorous flame retardants contain elements of nitrogen and phosphorus, it does not contain halogens, and it does not require antimony trioxide as Synergist. Nitrogen-phosphorus flame retardant is halogen free, low smoke, low toxicity, high efficiency, etc. The surface can generate a uniform layer of carbon foam layer when this flame retardant polymer heated. It plays the role of heat insulation, insulation oxygen, smoke suppression and prevent the phenomenon of droplet, therefore it has a good flame retardant performance.

Flame retardant mechanism of expansion type flame retardant are as follows:

Under lower temperature, ester of multiple alcohol released by acid source can be as dehydration agent of inorganic acid;

Under slightly high of temperature, inorganic acid and multiple alcohol has ester reaction, the system is in melting state;

During reaction process, the produced steam and by gas source produces non-combustible gas makes the molten state system expanding and foam. Meanwhile, multiple alcohol and ester dehydration carbonization to form inorganic and the carbon residue, and system further expansion and foam, finally it forms porous carbon layer. This layer of foam has excellent heat and oxygen and smoke suppression function, as well as has a good flame retardancy. If you have interest, please read more here or visit www.okchem.com, thanks!

Source: https://www.okchem.com/news/nitrogen-nitrogen-phosphorous-flame-retardants.html

Organic phosphorus flame retardants

Organic phosphorus flame retardants are the most important organic flame retardant agent in flame retardant agent. They have many varieties, use wide, it can both flame retardant and plasticized. It can makes flame retardant completely achieved halogen free, improve liquidity in plastic forming and inhibit residues after burning. The produced toxicity gas and corrosive gases is less than halogen flame retardant.

Can organophosphorus flame retardants be successfully used in flame retardant polymers or not, this mainly depending on their thermal stability, as well as compatibility, oozy and processing with polymer, and its effect on some of the key performance of flame retardant material, etc. Organophosphorus flame retardants are mainly phosphoric acid ester, phosphite, heterocyclic, etc, suitable for PP, PE and other polyolefin plastics. In addition, organic phosphorus flame retardants primarily through the condensed phase play a role in flame retardant.



The flame retardant mechanism of phosphorus flame retardant is similar to red phosphorus. Phosphorus-containing compounds when heated to decomposition products have very strong dehydrating effect, covering surface of the base material, playing a role in carbonized, forming dense carbon layer, and the carbon layer has a good effect on flame retardant.

Because phosphoric acid ester of organophosphorus flame retardants have good compatibility with the base material. The products have both fire-retardant and plasticized dual role, so they are widely used in organophosphorus flame retardants. Organophosphorus flame retardants mostly are liquids. Due to the shortcomings of volatility, liquidity, and large amount of smoke, poor thermal stability, making its application subject to certain restrictions. To overcome these drawbacks, by means of polycondensation reaction to produce high molecular weight organic phosphorus flame retardants, this can effectively reduce its volatility.

BDP and RDP is the development of novel organic phosphorus flame retardant halogen-free. Compared with the traditional organophosphorus flame retardants, they have a big molecular weight, high thermal stability, low volatility and efficiency higher characteristic. If you have interest, please click here for more, thanks!
Source: https://www.okchem.com/news/organic-phosphorus-flame-retardants.html

Inorganic phosphorus flame retardants

Phosphorus-based flame retardants is not a new type flame retardant. But as a halogen-free systems, it is popular in the field of flame retardant. Phosphorus flame retardants are the most important one among flame retardants. There are inorganic phosphorus flame retardant agent and organophosphate flame retardants. And organophosphorus flame retardants play an important role.

Inorganic phosphorus flame retardants

Inorganic phosphorus flame retardants include red phosphorus, ammonium Polyphosphate and phosphate.

Phosphate flame retardants include di-sodium hydrogen phosphate, lithium iron phosphate, magnesium phosphate, sodium phosphate, diammonium phosphate, phosphoric acid antimony and so on. Diammonium hydrogen phosphate is generally used in synthetic fibers and rubber, rigid and flexible foams, forest fire, paper, wood; but disodium hydrogen phosphate is used in the textile, paper, and wood fire-retardant.



Ammonium Polyphosphate (APP) is considered a good performance of inorganic flame retardant. White powder, decomposition temperature greater than 256℃, polymerization degree between 10-20 is water soluble, and it is poorly soluble in water when degree of polymerization is larger than 20. APP is cheaper than organic flame retardants, low toxicity and good thermal stability. It can be used individually with other flame retardant compound for flame retardant. The use of APP is wide, one of the most important use is as a source of acid and use with carbon source and gas sources, consisting of intumescent flame retardant system. Also it can be used for other fire-retardant plastics, fibers, rubber, paper, wood, large areas fire fighting of forest and coalfield.

Red phosphorus is an inorganic flame retardant with high performance. Compared with other flame retardants, add less can reach the same levels of flame retardant, therefore it has small impact on the physical and mechanical properties of the material. However, ordinary red phosphorus has one big disadvantage, that is it easily absorb moisture oxidation and release toxic phosphine gas in the oxidation process. And common red phosphorus has poor compatibility with plastics and difficult to disperse in plastic. Besides, red phosphorus is deep red, which limits its use in polymers. In order to improve some of these shortcomings, the surface treatment of phosphorus is the main direction of research, and the most effective method is microencapsulation. Mechanism of flame retardant of red phosphorus is: heated to decomposition to form strong dehydration of metaphosphoric acid, so that the burning of polymer surface carbonized. Carbonized layer can reduce the release of flammable gases, as well as heat effect. In addition, PO • free radicals which is formed by red phosphorus and oxygen go into the gas phase can capture large H•、HO• free radicals. Next time, OKCHEM will add details about organic phosphorus flame retardants. If you have interest, please read more here or visit www.okchem.com, thanks!
Source: https://www.okchem.com/news/inorganic-phosphorus-flame-retardants.html

Magnesium-aluminum flame retardants

Magnesium-aluminum flame retardants mainly are magnesium hydroxide and magnesium aluminum layered double hydroxide. Now, here will introduce these two flame retardants.



Magnesium hydroxide

Magnesium hydroxide flame retardant has flame retardant, smoke suppression, fills functions. It does not produce secondary pollution and accounts for more than 80% of inorganic flame retardant.

Magnesium hydroxide is nontoxic, noncorrosive and good stability. It does not produce toxic gases at high temperatures, it is considered to be the most promising. Compared with aluminium hydroxide (ATH), it has a higher thermal stability. As the decomposition temperature is about 3 4 0 ℃, about 100 ℃ higher than ATH, so it can be used for many engineering plastics. Its heat-absorbing is about 17% higher than ATH; smoke-suppressant is better than ATH; hardness is lower than ATH, this extend the life of flame retardant polymer.

Thermal decomposition temperature of magnesium hydroxide is 140 ℃ higher than that of aluminum hydroxide, this makes the synthetic material that add magnesium hydroxide withstand higher processing temperatures, also it helps to improve efficiency of flame retardant. The diameter of magnesium hydroxide particles is small, so it has small wear to equipment.

Because magnesium hydroxide has more advantages than the aluminum hydroxide, the proportion of consumption of magnesium hydroxide is growing. Compared with similar inorganic flame retardant, magnesium hydroxide has have better smoke-suppressant effect. It has no harmful emissions during the process of production, use and waste, also neutralize the acidic and corrosive gases produced in the combustion process.

Layer aluminum magnesium double hydroxide (LDH)

LDH is one of the most common and good thermal stability of double hydroxide. Because of its layers contain changeable anions, layered double hydroxides (LDHs) also called anionic clay. As a kind of important clay minerals, it has been widely used in various areas of industrial production, such as flame retardants, catalyst precursors, medical use antacids, ultraviolet, and infrared absorption materials, catalyst carriers, barrier materials, disinfection materials, PVC stabilizer, adsorption, anion exchanger, solid ion battery and so on.

The flame retardant mechanism of LDH: layer-like double hydrogen oxidation magnesium aluminum has tablets layer structure. There has hydroxy on layer board and crystal water between layers. Due to this special structure and composition, it absorb large heat when heated and decomposition, it can reduced burning system of temperature; decomposition release of water can dilute and barrier combustible gases; decomposed products are alkaline porous material, bigger than surface and can adsorb harmful gas, especially acid gas; Zn, Mg plasma exist in layer tablets is elimination smoke of effective component.

Next time, OKCHEM will add more about flame retardants. If you have interest, please click here for more or visit www.okchem.com, thanks!

Source: https://www.okchem.com/news/magnesium-aluminum-flame-retardants.html

Develop of halogen-free flame retardant

With the rapid development of science and technology, synthetic polymer materials such as plastic, rubber, fiber has come up. Most polymer composed of carbon, hydrogen, but their highly flammable brings a lot fire hazard to people's life. Therefore, the requirements to polymer material flame retardant also highlight. Add effective flame retardant is a more common method.

Flame retardant is divided into halogen flame retardant and halogen free flame retardant. Halogen-containing flame retardants that contain Cl, Br and f elements. Halogen-free flame retardant includes phosphorus series flame retardants, inorganic flame retardant magnesium hydroxide, aluminum hydroxide, zinc Borate, etc. Besides, halogen-free flame retardants include intumescent flame retardant and a number of special purpose fire retardant.

There are wide range of halogen-free flame retardant, they are mainly inorganic and organic flame retardants. Currently, consumption of halogen-free flame retardant in industry mainly are phosphorus (phosphonic) acid (includes halogen-containing derivative), zinc Borate, hydroxide, magnesium hydroxide, red phosphorus and antimony trioxide and so on.



Halogen-free flame retardant is one of the fastest growing material additives. The function of this product is to enable the non-fire-retardant materials with flame retardant properties. It does not burn easily or self-extinguishing under certain conditions. As halogen-free flame retardant technology advances, there are more and more kinds of halogen-free flame retardant. and its performance has been significantly improved.

Nowadays, the function of halogen-free flame retardant can be divided into two types: one is slow down the fire and stop the fire from spreading, by way of multiple function principle suppress the combustion reaction; the other is let the surface rapid foaming expanding and carbonation to form a protective.

From the perspective of overall trends on the international world of flame retardant product performance requirements become more stringent. Now, the main development trend of non-halogen flame retardant as follows: non-halogenated; halogen-free flame retardant ultrafine; halogen-free flame retardant surface treatment; study of halogen-free flame retardant system synergies. More details will be added next time. If you have interest, please click here!

Source: https://www.okchem.com/news/develop-halogen-free-flame-retardant.html

Food thickeners used in food

Food thickener is a food additive mainly used to improve and increase consistency of food, keep the color, aroma, taste and stability of the flow and gel food and improve food physical properties. Thickening agents can increase viscosity or gel formation of food, thus change the physical properties of foods, give food sticky and superb taste, as well we role of emulsifying, stabilizing or was suspended.

The commonly used thickeners in beverage production and emulsion stabilizer used thickeners mainly are carboxymethyl cellulose sodium, propylene glycol alginate, carrageenan, xanthan gum, pectin, guar gum, locust bean gum, etc.

Using properties of thickeners

Viscosity property

Most food thickeners in the concentration polarization or lower concentration consistent with Newtonian rheological properties of liquid. It showed pseudoplastic at higher concentrations. With the increase of food thickeners, viscosity of the solution also increases.

Gel properties

When the thickener concentration aboves gel critical concentration, its solution is viscous liquids in warm conditions. But when the temperature decreases, the dispersion medium are all contained in polymer network structure, forming semi-solid substances which does not flow, known as gel.

Xanthan gum is the best thickening stabilizer of soy sauce. It can significantly enhance the color of soy sauce to prevent soy sauce produce precipitation, the usual dose is between 0.05%-0.3%.



Xanthan gum solution miscible with many saline solutions, and the viscosity is not affected. CMC-Na is treated with alkali pulp or cotton wool and then chemically refined form, it is white powder or fibrous material and the major ion fiber vitamin gel.

The raw material of maltodextrin is starch. Low degree hydrolysis by acid or enzymatic to get products with the DE values below 20%. Maltodextrins are low conversion of starch, its molar mass is between starch and starch sugar. Its raw materials are corn, rice, etc.

Edible gelatin is an important ingredient and additive in the food industry, which is often used as a gelling agent, stabilizer, emulsifier, thickener and clarifying agents applied to the production of meat products, cake, ice cream, beer, fruit juice and so on.

Pectin can be applied to the manufacture of jams and jellies; prevent cakes harden; improve cheese quality; manufacture fruit juice powder and so on. Pectin is a natural polymer with good gel and emulsion stability. View more！
Source: https://www.okchem.com/news/food-thickeners-used-food.html

Thickeners in food industry

Thickeners has an extensive use both in food and in the industry. In food industry, food grade thickeners is applied to yogurt, jelly, ice cream and instant soya milk, sesame paste, etc; in industry, thickeners is added to printing paste, paint, glue and so on.

At present, the application of thickeners is already a combination of technology and art of food production. It offers a variety of choices to food industry. The combination of all kinds of glue has became one of many specialty products processing secrets. Food styling, taste and cost is related to proper selection of thickeners and the best combination.




Thickening effect can improve the consistency of the food. This makes material easier extruded from the container or sticks to food better, as well as keep food silky texture. For example, cellulose type of thickener used in ice cream to increase the degree of its expansion, improve melting rate, add texture and shaping capability; when used in bread it adjusts uniform cellular, reduces dregs, and increases the volume; it functions as adhesive in the processing of fish, meat, etc.

The stability makes processed food system becomes stable and reduces deterioration or damage, such as prevent aging of starch foods, prevent ice crystals in the ice cream, increase the stability and persistence of foam in beer, carbonated drinks.

Add thickeners to jelly, flavouring syrup, fudge, etc can improve gelation. Add some hydrophilic good thickener to meat products, bread, pastries, pasta and other foods not only can play a role in water retention, but also enhance or improve food texture.
Commonly used thickening agent are cellulose ethers and their derivatives, associating alkali swelling thickener and polyurethane thickeners.

1 Cellulose ethers and their derivatives: this kind of thickeners are mainly hydroxyethyl cellulose, methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl methyl cellulose, etc.

2 Alkaline swelling of thickeners: including non-associative alkali swelling thickeners and associating alkali swelling thickeners.

3 Urethane thickeners and hydrophobically modified non-polyurethane thickeners: polyurethane thickeners is a hydrophobic groups modified ethoxy-polyurethane water soluble polymers, it belongs to nonionic associative thickener. The development of environment-friendly polyurethane thickener has received attention. More about food thickeners will be add next time, If you have interest, view more here, thanks!
Source:https://www.okchem.com/news/thickeners-food-industry.html

Introduction of food antioxidants in use

Food antioxidants usually used in oil and oil-containing foods. The effect is prevent or delay the oxidation of food, but it can not change the oxidation results, so it must be added before lipid oxidation. When using phenol antioxidants, adding certain acids such as citric acid and phosphoric acid at the same time, this can significantly improve the antioxidant effect. These acids are called synergists. Generally considered they can chelation with promote oxidation of trace amount of metal ion, so that it plays a role of antioxidant synergistic.

Synthetic antioxidants, such as ascorbic acid and its sodium salts are safe. The antioxidant role of erythorbic acid and its sodium salt is the same with ascorbic acid and its sodium salt. And the low price is conducive to the further development and application. Here are several brief introduction about food antioxidants of OKCHEM:

Ascorbic acid

It is also called Vitamin C. It is almost white crystals crystalline powder, odorless or almost odorless and tasted sour, easily soluble in water but insoluble in ether and chloroform. In addition to increasing the manufacture of interferon, vitamin c is a potent T-effector cell stimulus, as well as a very strong antioxidant. Vitamin c reduces lipid production in the brain and spinal cord. But this manufacturing process is often induce by free radicals and bring damage. These parts can use large amounts of vitamin c to protect. Through barrier between blood and brain, when a bio-flavonoids called Orange Peel is exists, vitamin c is a potent free radical scavenger.

Erythorbic Acid



Erythorbic acid and its sodium salt has a wide range of uses, such as food antioxidants, preservatives, as well as in addition, medical, chemical. Of course the main applications is in the area of food processing. Along with our beverages, meat, fruit and vegetable processing, seafood, bakery and other food industry's rapid development, erythorbic acid has a very broad application prospects.

Sodium Erythorbate

The other Name is sodium D-isoascorbate. It's appearance is white or slightly yellow crystalline powder or pellet, odorless, a little salty and dissolvable in water. Sodium erythorbate is an important antioxidant in food industry, as it can keep the color, natural flavor of foods. They are mainly used in meat processing, fruits, vegetable, tin and jam etc. Also they are used in drinks, such as beer, grape wine, soft drink, fruit tea and fruit juice etc. But it must be stored in the warehouse of ventilation, dry and shady and cool, and cannot be mixed with poisonous.

Other more details will be added next time. If you have interest to food antioxidants and other food additives, please click here to get more or visit okchem.com website, thanks!
Source: https://www.okchem.com/news/introduction-food-antioxidants-use.html

The use of antioxidant in food

Food antioxidant plays an important role in food production, but its role is more complicated. Ascorbic acid, erythorbic acid and its sodium salt themselves are easy to oxidize, so it can protect food against oxidation. BHA and BHT phenolic antioxidants maybe combined with peroxides produced by lipid oxidation, then interrupt the oxidation reaction chain to prevent oxidation. Other antioxidants may inhibit or destroy oxidase activity to prevent oxidation.

Due to there are many kinds of antioxidants, the mechanism of antioxidant are not the same. there are many possibilities. There are four main types: through the reduction of antioxidants to reduce the oxygen content in the food system; interrupt the polymerase chain reaction in oxidizing process to prevent further oxidation process; damage, reduce oxidative enzyme activity, so that it cannot be catalytic oxidation; close the substances that can be catalyzed or can be caused oxidation reaction, such as complex catalyzes the oxidation of metal ions.

Antioxidants are divided into natural antioxidants and synthetic antioxidants by source. But the solubility classification are as follows:

1 Oil-soluble antioxidants
The commonly used are butyl hydroxy anisole (BHA), ethoxyquin hydroxy toluene (BHT), Gallic acid Propyl gallate (PG) and other synthesis oil-soluble antioxidants; Mixed tocopherols concentrate and guaiac resin and other natural oil-soluble antioxidants.

2 Water-soluble antioxidants
Including Ascorbic acid and its sodium salts, erythorbic acid and its sodium salts and other synthetic products.

3 Compatibility antioxidant
Lipoic acid (alpha lipoic acid) is a free base that can elimination accelerated aging and pathogenic. It is similar to vitamin. Lipoic acid is enzyme exists in mitochondrial, sulfur bitter in body into cell after intestinal absorption. As it is both fat soluble and water soluble, so it can unhindered access in body.

But before using, people should fully understand the antioxidant properties. Master the add time of antioxidant is important. Pay attention to compound of antioxidants, synergistic agent and stabilizing agent, also choose the right amount. What's more, control factors that influence the effect of antioxidants. If you want to know more details and products of food antioxidant, send us email to marketing@okchem.com or click here, hope this can help you, thanks!

Source: https://www.okchem.com/news/use-antioxidant-food.html.

Introduction about several photoinitiators

Photoinitiators is also called photosensitizer or light curing agents. It is a kind of energy absorbing certain wavelengths in ultraviolet light (250~420nm) or visible region (400~800nm) and produce free radicals and cations, thus it triggers polymerization of cross-linked compounds.

Here are several commonly used photoinitiators from OKCHEM

Photoinitiator 184



Product Name : l-Hydroxy-Cyclohexyl-Phenyl-Ketone
Molecular Weight : 204.3
CAS No. : 947-19-3
Appearance: white crystalline powder
Melting point (°C) : 44-48
Applications: 184 applied to copying varnishes, plastics, paint, wood paint, adhesives, offset inks, screen printing inks, flexographic inks, electronic products. Generally, added with other photo-initiator. It can be used with UV absorbers if required. 2-5%w/w is recommended.
As highly efficient photoinitiator for UV curable systems, it provides non-yellowing durability and longer shelf life for UV curable systems.

Photoinitiator TPO

Product Name : 2,4,6-Trimethylbenzoyldiphenylphosphine oxide
Molecular Weight : 348.38
CAS No. : 75980-60-8
Melting point (°C) : 91-94
Appearance : Light yellow crystalline powder
Applications: TPO is an effective photoinitiator for UV-curable based coatings, adhesives, inks and printing plates. It can make white paint and thick coating (TiO2 as white pigment) fully cured. TPO is a powerful free radicals (I) type of photoinitiator, especially suitable for coloured system and areas of thick film curing. 0.5-4%w/w is recommended.

Photoinitiator 819

Product Name : Phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide
Molecular Formula : C26H27O3 P
Molecular Weight : 418.46
CAS No. : 162881-26-7
Melting point (°C) : 127-132
Applications: It can be used in UV-curable varnish and paint system, such as wood, paper, matel, plastic, printing ink, etc. Usually, it will be used together with 184 and BDK.

Photoinitiator 1173

Product Name : 2-Hydroxy-2-Methyl-Phenyl-Propane-1-one
Molecular Formula : C10H12O2
Molecular Weight : 164.2
CAS No. : 7473-98-5
Appearance : Colorless to pale yellow and clear liquid
Applications: As a liquid photoinitiators, 1173 has a very good compatibility and can easily mix with other photo-initiator and prepolymer. 1173 is a photoinitiator for UV curing acrylic resin for coating wood, metal, paper and plastic etc. It provides non-yellowing durability and longer shelf life for UV curable systems.

NOTE

The above information is provided as guidelines only. It is important that the customers evaluate any product in their own system to determine suitability.
If you want to know more details of photoinitiators, send us email to marketing@okchem.com or click here to get more here, hope this can help you, thanks!

Source: https://www.okchem.com/news/introduction-several-photoinitiators.html

Photoinitiators and its advantages

In the UV curing systems, such as UV gel, UV coating, UV ink, after accepting or absorbing energy, they themselves have a chemical change, decomposed into free radical or cationic, then polymerization.

Photoinitiators, also known as photosensitizer or photocuring agent. It can absorb certain wavelengths of energy in ultraviolet light (250~420nm) or visible light (400~800nm), it produces free radicals and cations, etc, triggering monomer polymerization crosslinking curing compounds.

Ideal photoinitiators should have the following advantages:
1 cheap and simple synthesis
2 photoinitiator and light products should be nontoxic and odorless
3 good stability, easy to store for a long time
4 the absorption spectra of photo initiator must match with the emission spectrum of the radiation source, and has a higher molar extinction coefficient
5 higher efficiency jump between initiator channeling of photoinitiation
6 the higher efficiency



The developing trend of photoinitiators focuses on hybrid, visible light type, water base, macromolecules, and the use of dual-cure.

Radiation curing technology is an energy-saving environmental technology. Purple outside light (UV), electron beam (EB), infrared light, visible light, laser, chemical fluorescent and other radiation light irradiation curing completely meet "5E" features: efficient, practical, economical, energy-saving and environment friendly. Therefore, it is called green technology. Photoinitiator is one of the important components of UV-curable adhesives. It plays a decisive role in curing speed. After UV exposure and absorb light energy, photoinitiators divided into 2 active free radicals, initiated photosensitive resin and has chain polymerization with active diluent makes adhesive crosslinking curing, which is characterized by fast, environmental protection and energy saving.

Selection principles:
1 According to oligomers and monomers type select suitable activity photoinitiator.
2 Has good solubility and reactivity, low consumption, high raise efficiency.
3 Has a certain degree of thermal stability. It don't breaking up under 85℃, there should be stored for a long time stability.
4 It's better composite using of several photoinitiators, it can cause curing in different wavelength ranges. The curing speed is higher than single photo-initiators.
5 The photoinitiator used with the EDAB amine accelerator.
6 Small odor, non-toxic and pollution-free environment.
If you have interest, read more here, thanks! Source: https://www.okchem.com/news/photoinitiators-and-its-advantages.html .