Application of micronized wax in the coating

It will generate a small amount of low polymer and low molecular weight polyethylene in the production polyethylene, it is known as polymer wax or polyethylene wax. It is widely used because of its hardiness, heat resistance, chemical resistance and wear resistance. This part of wax as an additive can be added directly to polyolefin processing in normal production, it can increase the product optical and process performance.

Polymer wax can be used as dispersion lubricants of plastics and pigments, hot-melt adhesives and wax, auto detailing wax, etc. Polymer wax is a nontoxic, and tasteless, and no corrosion, and white or slightly micro-yellow of solid, relative molecular quality for 1800-8000. It has good chemical stability.

Paint wax mainly added in the form of additives, wax additives exist in aqueous emulsion form. Mainly it improves smoothing and scratch resistance of coating, and water resistance. Besides, it can also affect the rheological property of coating. It can be used as a matting agent in Matt lacquer, according to the grain size and grain size distribution, wax additives extinction effect also varies. Micro-crystallization of modified polyethylene wax can be used for improving surface properties of water-borne industrial coatings. Polyethylene waxes for coatings can be made high gloss solvent paints waterborne coatings, powder coating.

Micronized wax is widely applied to printing ink, paint, and coating, it has became an essential important accessories in paint and ink production. Most micronized waxes are made through the micronization process, but some are micro-powder production of amide waxes, microcrystalline wax, natural waxes. The molecular weight of polyethylene wax is about 1000-5000, and its melting point is 100-120 ℃. It has excellent resistance to friction, scratch, anti-adhesion and gloss. Wide branched-chain structure and better wear resistance. But the properties of high density and low density polyethylene micronized wax are different.

The functions of micronized wax in the coating films are as follows:
1. waxes in distribution of the film to protect coating film from scratching, abrasion and provides abrasion resistance, such as container coatings, wood coatings, decorative paints require this feature.
2. its low coefficient of friction provides excellent coating of slipperiness.
3. because of the stability of wax gives the film better resistance to water, salt spray, etc.
4. it prevent laminating
5. choosing the right wax, it has different matting effect depend on different amount
6. prevent silica induration deposition and increase the coating stability in storage.
7. antiMetalMarking, especially in the printed cans of paint, in addition to offering good processing properties, it can also serve to protect the printed tank storage stability. Click here to get more!

Advantages of silicone wall waterproofing agent

With a waterproofing agent on the building, as if the wall wearing a raincoat, rain drops fall like beads-natural on the surface, waterproof agent keeps the wall dry and makes us have a comfortable room with a natural good mood. Silicone wall waterproofing agent, which can be used for porous inorganic base, it could not withstand the pressure of waterproof and protective. Some areas may have more typhoon earthquakes, which requires buildings must be of high quality. This repellent is differently, the oxygen content near zero, absolutely it different from the traditional process. It has no corrosion to steel, permanent moisture-proof, impervious, and breathability.

General waterproof agent (waterproof coatings) by blocking building surface micro pores and capillary (holes), cut off the outside water and air. However, it also blocks of internal moisture in building materials distribution, that's the General waterproofing agent of "airtight", it makes the building's surface coating blistering (drums), cracking, spalling. But silicone wall waterproofing agent both waterproof and breathable.

This product is used in gardens, stone buildings, red yellow white walls, stone statues, inscriptions can effectively prevent the rain damage and keep primary anti-weathering. It is convenient and safe use, the unique formula makes it has more excellent durability than other similar products. In addition, the hydrophobic agent can penetrate into the walls some depth, thus less affected by UV radiation and atmospheric aging, and long service life.

As waterproof of concrete, perlite products, gypsum products, limestone, brick, sandstone, etc, organosilicon waterproofing agent can also be mixed with cement mortar, coatings and additives of water soluble paint. Products using high-tech formulations, made by a combination of fatty acids and made more than 10 kinds of inorganic materials through high temperature chemical reactions. It is accelerating and compact to cement mortar. It is nontoxic, tasteless, pollution-free, does not burn, the Remover waterproof, impervious performance, as well as accelerating, anti-freeze, convenient and cheap.

Organic silicon water repellent agent is silicon-oxygen polymer structure. Silicon-oxygen chemical characteristics determine the structure of the polymer has very good water repellency, climate, heat, oxygen. Materials treated by this water repellent can form a layer of gas permeability of the waterproof membrane, when mixing architectural object three-millimetre, this layer of waterproofing membrane package in the composition of the material microscopic particles. It has a strong water repellency effect, and its permeability is excellent. Read more here!

Adhesion promoter of powder coating

Adhesion promoter is a new type resin adhesive promoter, it has special effects to coatings against peeling. Wide solubility can improve the adhesion of various coating systems such as waterborne coatings, inks, screen printing paste, UV varnish, PU varnish, plastic paint, metallic paint, it particularly suitable for water based paint, improve traction and toughness.

Features of the adhesion promoter are as follows: it has excellent adhesion to improve the surface of non-ferrous metals, such as aluminum, aluminum alloy, stainless steel, zinc plated surface, etc; it can improve ductility and impact resistance of the coating; it does not change color with urgent high temperature baking, and it does not affect the weather resistance of coating; it does not affect the storage stability of coatings. Adhesion promoter is widely used in a variety of chemical fiber, wood, plastic, metal, ceramic, glass, ABS, PVC and so on.

It is understood that compared with traditional coating, UV-curing coatings containing no organic solvents or inert diluents, it is no need heat when curing. Because of the less pollution, low energy consumption, high efficiency, good chemical stability characteristics, suitability, etc, it is an energy-efficient and environment-friendly modern paints and has been widely used in various fields.
With the development and application of photosensitive coatings, the key of UV-curable coatings formulation is to improve its adhesion to various substrates, because good adhesion is the premise for coating film to get a good processing properties and outdoor weatherability, chemical resistance properties. Proper adhesion promoter to enhance film effective contact with the substrate, using a reactive functional group adhesion promoter to form strong chemical bonds with the substrate surface to obtain good adhesion properties.

In order to solve the problem of poor adhesion of UV-curing coatings, hydroxyethyl methacrylate or methyl acrylate and phosphorus pentoxide as raw materials under certain conditions for electrophilic addition reaction to get UV-curing powder coatings adhesion promoter containing phosphate groups. Total reaction time determined by acid test is 3.5h. Infrared Spectral analysis of product show that the hydroxyl group in the reactant is completely reaction product as well as in the phosphate group and CC double bond formation. Comparison of homemade products and the products in the market of performance on a different sheet, the results showed that the two products have very good role in UV-curing coatings and metal, glass, wood and other polar substrates. Click here!

Silicone water repellent coatings in use

Organic Silicon class of waterproof paint has excellent resistance of high temperature, water, various gas, ozone and UV degradation. It both can keep the wall normal breathable and can resist erosion of rain. It makes wall surface moistureproof, anti-corrosion, resistance frozen thaw and keep gloss, so it is an ideal building waterproof material.

Organic silicon has stable chemical properties, good hydrophobic, good aging resistance and good durability. Silicone waterproof coating is based on water-soluble silicone resin as binder, using advanced technology and emulsified into a kind of architectural waterproof coating. The main raw material of silicone water repellent coatings are silane and siloxane. It is a new waterproof materials with pollution-free, Hypo-allergenic. It divided into ordinary type and endurance-type, each type has body type, solvent-borne, waterborne and latex products, mainly used for porous inorganic base waterproof protection, such as concrete, tile, brick, stone, etc.

The main base material of color organic silicon waterproof paint are silicone rubber latex or and other emulsion composite, mixed into water, and inorganic filler, and various additives preparation to make into emulsion type waterproof paint. It has both coated film waterproof and permeability waterproof material excellent characteristics. Organic silicon waterproof paint has good waterproof properties, permeability, film-forming properties, elastic, extends properties and resistance of high or low temperature.

Silicone rubber waterproof coating based on silicone rubber emulsion and other emulsion compound as the main base, and mixed with inorganic filler and crosslinker toughening agent, defoaming agent, catalyst and other chemical. It adapt to the deformation capacity of grass-roots, it can penetrate the grassroots and grass-roots firm bonding, cold application or blow, brush, or spray, easy operation, fast film, available on the damp grass-roots construction. It is nontoxic, odorless, nonflammable, safe and reliable, and can be made into various colours of paint.

Silicone waterproof coating is an emulsion coatings by water as dispersion medium, loss water and cure to form the lattice structure of polymer. After the paint on the surface of grass-roots, along with infiltration and evaporation of moisture, particle density increases to loss liquidity. When the drying process continues, the excess water continuing to lose, emulsion particles touch each other, continuous cross-linking reaction with cross-linking agent, catalyst, finally it forms uniform, dense rubber-like elastic continuous film. Read more!

Silicone water repellent for use

Silicone water repellent agent is new waterproof materials of pollution-free, Hypo-allergenic, which is used in many advanced countries in the world. This products spray (or brushing) on buildings surface, and form a layer of colorless transparent and anti-UV of breathable film on its surface, rain drops will natural flowing and block water invaded, meanwhile, it cleans surface dust of buildings.
Silicone water repellent has two types of properties are: water and oil. Aqueous silicone water repellent agent is colorless or pale yellow, it also can be used as retarder and water-reducing agent and enhancer effect when it is mixed with cement mortar. So it's suitable for the construction industry, external wall finishes, underground engineering, antique building, pool, brick, cement and gypsum products, as well as roof waterproof, moisture-proof, anti-pollution treatment. Oil silicone water repellent is transparent and generally used in glazes, ceramic tile, floor tiles, ceramic, etc. It may be appropriate to add some solvent dilution and easy to use.

Silicone water repellent is efficient waterproof synthesized by methyl n-hexane. It has great affinity to many materials, especially silicate building materials. Work with carbon dioxide in the air can gathere to form a layer of silicone waterproof membrane, this plays the good resistance to water penetration, which is currently a high quality cheap efficient waterproofing material in building materials. It is welcomed by the majority of users because of its low price and convenient for construction.

Permeability silicone water repellent has a good adhesion and can work directly on a wet or dry surface; it is green, waterproof, breathable, reliable and safe to use. But there are some tips for the use of silicone water repellent: silicone water repellent can be used in conjunction with sodium nitrite type of antifreeze in winter; silicone water repellent is general chemical, construction workers should be careful not to splash to the face especially eyes in storage and use, wearing protective gloves, protective glasses, wear overalls, avoid skin contact; it shall not be in contact with other active metals like zinc, aluminum, Tin in transport and use, it can't be storage in iron metal container, incase it has product deterioration or containers corrode caused by chemical reaction.

During the storage and transportation of silicone water repellent, it should prevent rain, exposure and packaging damage, the storage ambient temperature is 0~30℃ and shelf life is three years. Read more!

The composition of UV-curing coatings

UV-curing technology has developed rapidly due to its own characteristics. At present, UV-curing coating and its equipment has been widely in chemicals, machinery, electronics, light industry, telecommunications and other fields. Light curing paint including: UV curing wood coating (bamboo wood floor, decorative Board), furniture, ; UV curing plastic coating (car parts, devices, CD, credit card); UV curing metal coating (steel rust, color coated plate, printing iron); UV curing paper coating (decorative paper, label, card, and written surface glazing, and metal of coating); etc. With the increasing emphasis on environmental protection, UV curable coatings are replaced or partially replace the traditional coating.

At present despite the wide variety of UV-curing coatings and performance, but main ingredients typically include photo-initiators, reactive diluents, reactive oligomers, pigments, fillers and improved film properties support additive. Photoinitiators in the coating formulations make up small proportion (usually 3%~10%), but the role is critical in UV-curing coating formulations, UV-curing reaction does not work if it is missing. Reactive diluent in UV-curing coatings in addition to dilution, adjust viscosity, but also participate in light curing reactions, influencing the curing speed and the mechanical properties of paint films. Selective active diluent should consider the following factors in UV-curing coatings wood paints: viscosity, toxicity, irritation, volatility, volume, responsiveness, solubility of photoinitiator and resin, thermal stability and so on.

Reactive oligomers are photosensitive resin and the main part of UV-curing coatings, which largely determine the value of the main properties of the cured paint film, therefore, reactive oligomers is an important part of UV-curing coating formulation. Reactive oligomers include many types of acrylic resins, such as epoxy acrylate, urethane, polyester acrylates and polyether acrylate and acrylic resin, etc. But the most used are epoxy acrylate and urethane acrylate.

Unsaturated polyester resin can also be used for UV-curable wood coatings, but it's lacks flexibility in the formula and has many disadvantages, as a result it is basically been eliminated in modern UV-curing coatings. UV curing coating is high curing efficiency, environmental, energy-saving, productive and can for line job, they are widely applied to chemical, mechanical, electronic, and some other field. UV-curable Wood coatings in our life mainly used for furniture, bamboo, wood flooring and so on. As it greatly improves customer productivity, which has been widely welcomed. But before you use UV paint, first you need to adjust the UV coating equipment to make sure it is in the best condition, such as various devices parameters of roller coating machines, curtain coating machines and UV light curing machine, etc. Click here!

Properties of new photoinitiators

UV-curable technology due to its advantages of energy conservation and environmental protection is widely used in paints, printing inks, adhesives and other areas. Photoinitiator is an important part of UV curing system, and its development and progress play an important role in progress of the UV curable products.

UV-curing refers to the UV energy, induced reaction of liquid materials quickly turned into a solid process, it commonly used in paints, printing inks, adhesives and other preparation. Compared with the General methods of curing, UV-curable has the advantages of high curing speed, without heat, little-used solvents, high efficiency, energy saving and the automation curing process.

According to the reaction mechanism is different, photoinitiators are divided into free radical polymerization photoinitiator and cationic polymerization photoinitiator. History of the study on free radical polymerization photoinitiator is long, it mainly contain chromophores of compounds, especially compounds contains a benzene ring attached to Carbonyl, including phenethyl benzoate and its derivatives, ketones, aromatic ketones, acyl-phosphine oxide, etc.

Acyl-phosphine oxide material as a new photoinitiator for its excellent performance in coatings, inks, adhesives are widely used in industries. It has more absorption in the ultraviolet and visible region, and it can be more effective than other photo-initiator triggered curing for coating systems containing pigments. Acyl-phosphine oxide photoinitiator can be used for more strict with the yellowing of the occasion, such as: white, light colored inks and coatings, etc. In addition, the acyl phosphine oxides have a bleaching effect on light.

Compared with traditional solvent-borne UV-curing system, water soluble UV curing system has the following advantages: water for thinner viscosity, easy to adjust, no odor and does not irritate the skin, it contains no volatile organic compounds, as well as to reduce environmental pollution. To development water-soluble photoinitiators that is adapted to water-soluble light curing system phase, Anion-cation radical or hydrophilic non-ion base is introduced to the original of solvent type light raised agent structure, then series of water-soluble photoinitiators have been developed., such as benzene methyl ketone carboxylic acid salt.

UV-curable technology is a new generation of green technology that is superior to traditional curing technology. The excellent product performance is widely used in paints, printing inks, adhesives and other aspects. As an important component of UV-curing technology, photo-initiator of development and progress in development of UV-curing technology has important implications, and technological advances are increasingly new requirements for the development of the photoinitiators. Click Here!

Advantages of photoinitiator in use

Photoinitiator, also known as photosensitizer or photocuring agent, is a type of ultraviolet light (250~420nm) or visible (400~800nm) absorb certain wavelengths of energy that produce free radicals and cations, triggering polymerization of cross-linked compounds.

Ideal photoinitiators should have the following advantages:

(1) cheap, simple synthesis;
(2) photoinitiator and its light products should be nontoxic and odorless;
(3) good stability, easy to store for a long time;
(4) the absorption spectra of photoinitiator must match with the emission spectrum of the radiation source, and it has a higher molar extinction coefficient;
(5) as most photoinitiation jump to excited Singlet after absorbing light energy, jump between initiator channeling need higher efficiency;
(6) a higher efficiency

In the UV curing systems, including UV gel, UV coating, UV ink, etc accept or absorb energy, a chemical change takes place itself, and it is decomposed into free radical or cationic, then polymerization is triggered.

As most of the photoinitiator is small molecular photo-initiators, it is volatile and migration in storage, resulting in low efficiency of photopolymerization, bad smell, and even toxic, these have a bad effects of UV inks used in food packaging.

Currently, low odor and nontoxic photoinitiator has been developed, such as polymer photoinitiator. It has excellent performance and can ease the transfer. Meanwhile, polymeric photoinitiators have the following characteristics: regulation of distances between photosensitive groups can be obtained with different reactive polymeric photoinitiators; use synergies improved photosensitive properties of optically active groups; prevent yellowing and aging of the ink layer. Polymer photoinitiator for UV printing inks can be used for food packaging and has better performance.

Radiation curing technology is an items of energy-saving and environmental technology. UV, EB, infrared light, visible light, laser light, and chemical fluorescent, and other radiation light irradiation curing are completely efficient, enabling, economical, energy saving and environmental friendly. . Photoinitiator is one of the important components of UV-curable adhesives and it plays a decisive role in curing speed. After UV exposure to UV, the absorb light energy divided into two active free radicals, then initiate chain polymerization of active diluent and photosensitive resin and adhesive curing, which is characterized by fast, environmental protection and energy saving. Photoinitiator focuses on the developing trend of hybrid, light type, water base, macromolecules and so on, and the use of dual-cured, which receives impressive effect. Click here!

Surfactant used in paper-making industry

Surfactants for deinking of waste paper has reached as much as 7000t in a year in China This indicates that surfactant is more and more important in improving pulping process and performance of paper. Add good penetration anionic and non-ionic surfactants in the bleaching process can achieves a uniform bleaching effect. Add washing active substances alkyl benzene sulfonic acid sodium or nonylphenol ethoxylate in the pulp bleaching process can get a good washing effect. Surfactants have a wide range of applications in deinked, paper sizing, blanket washing and paper coating pigment dispersant. etc.

For liquid interface, surfactant can through reduced interface tension to increases wetting and improve penetration role, some branched-chain structure or more alkyl structure of surfactant has good of wetting performance, such as fast penetration agent and penetration agent JFC, using wetting role of surfactant during pulp process, and accelerate cooking additives and other additives of penetration and uniform dispersed role on cooking raw materials.

With the increasing of environmental pressure, in order to alleviate the lack of pulp and raw materials and reduce pollution, save energy, reduce costs, etc, waste paper recycling attracted more and more attention.

Commonly used deinking agents are made up of surfactants and inorganic drugs or various surfactant blends. Commonly used anionic surfactant in deinking agents formula are potassium soap, sulfonic of oil, straight chain alkyl benzene sulfonic acid sodium, fat alcohol sulfate, sulfonic base succinate II Xin ester sodium salt, fat alcohol poly oxygen vinyl ether sulfuric acid ester sodium salt, etc, as well as alkyl phenol poly oxygen vinyl ether fat alcohol poly oxygen vinyl ether, poly ether, poly oxygen vinyl loss sorbic alcohol fatty acids ester, fatty acids poly oxygen vinyl ester, and other non-ion surfactant.

With the popularity and importance of the application of surfactants in paper-making industry, and the application of surfactant in papermaking in China have developed greatly. With the requirements to paper of industrial use increasing, development of additives for paper paid more and more attention, such as organic fluoride gel, silicone waterproofing agent, lubricant calcium stearate, polyethylene oxide isolation agent emulsifying and the developmnet of other special surfactant. Especially the low cost organic fluorine, silicone and other special surfactant study on application of papermaking. Click here now!

Silicone additives and surfactants

The excellent exhibition capacity of silicone is an important factor in its development to become auxiliaries. Exhibitions are often mistaken for wetting. Exhibition does not depend on surface tension decrease, and organic fluorine surfactant in surface tension lower than silicone. In view of its many features and benefits, silicone used as additives in the pigment industry will have unexpected results.

Skeleton of hydrophobic has nothing to do with the presence of silicon, their hydrophobicity is higher than methylene groups, while methylene groups are major components of many commonly used functions of hydrophobic hydrocarbon surfactants. The equilibrium reaction applied by synthesis matrix will have a different length of the allocation of polysiloxane chain between pools. It appears from the many features associated with silicone, it mainly produced by three of siloxane. Therefore, trisiloxane skeleton must be steamed out from mother liquor of silicon, and this will increase in the synthesis of auxiliary production cost.

Hydrophilic basically similar to most commonly used surfactants, ethyl Kiki chain consisting of element has a Poisson distribution. As to mixed synthesis condensation reaction kinetics, which is, in any case, the isopropyl groups of distribution should be bias towards one end of the chain. Polyether can stay at Tsunemoto ends or more hydrophobic groups end caps. Overall polarity of surfactant may be replaced by two methyl silicons oxygen group adjusted proportions.

Agricultural organic silicon spray additives is a organic silicon additives, they are widely applied to pesticides insecticide, there is no ecomposition on original drug. They have super low surface tension and super extended capacity (extended capacity is greater than water of 9 times times above), this can well enhanced liquid on plant surface and insects surface of penetration and cover and to improve the efficacy. In addition, they can enhance pharmacy anti-rain scour capacity. It can play a good role in certain pest outbreaks.

At present, application of pesticide surfactants are fatty alcohol polyoxyethylene, sulfonic acid ester, alkyl-phenol polyoxyethylene ether, sulfonate, amide, silicone, etc. Silicone additives with its good agro-silicone additives have good exhibitions and permeability. Specifically, these additives can make solutions easier to penetrate plant surfaces. This ability means it can get the great spray effect with only a small amount of spray. It can save up to 50% of water during the spray of pesticides. Read more!

Surfactant and emulsion coatings

In recent years, water as the medium of water paint in coating production percentage increase year by year, which has become one of the main varieties of paint in the future development. Emulsion coatings play an important role in water-borne coatings, it is a polymer-based materials (film) together with fillers and additives of the coating system. Because they can be thinned with water, the construction is convenient, safe and nontoxic, low costs and excellent coating properties and other characteristics, they are widely used for Interior and exterior painting, industrial and maintenance of paint as well as others, such as fiber, paper, leather and many other application areas, plays an increasingly important role.

Competitive adsorption of surfactant is frequently asked questions in emulsion paints, paint system is complex, so it has a lot of different surfactants and a different interface. Different types of surfactants as Binder resin in the polymer or latex particles will produce competitive adsorption on the pigments surface. This mainly depends on the compatibility of base material, surfactant and surface with each other. The adsorption and desorption of surfactant may cause changes in the rheological behavior and make dispersion system to lose stability.

Competitive adsorption of surfactants are also related to associative thickeners in the coating system. Associative thickeners has a high surface activity, they have greater tendencies on hydrophobic surfaces such as latex particles. Hydrophobically modified polyurethane is the so-called HEUR thickener. If LaTeX surface not covered by the surfactant fully, activity of hydrophobic associating polymer on the surface will be adsorbed on the surface of particles, and it often lead to gel. After adding the non-ionic surfactants, it is uniform dispersion of flowing again, which suggests that non-ionic surfactant replacement surface polymer of latex particles.

These special surfactants can eliminate surface tension gradients due to surface faster than the internal when coating solvent evaporation in the applications. In addition, applications of reactive surfactant in the emulsion polymerization has received more and more attention in recent years. The emulsifier connected with the latex particles in the form of Covalent bonds, it can avoid or at least minimize a lot of problems when using traditional emulsifier, improving the stability of polymer emulsion and its film-forming properties. Read more here!

Surfactant of pesticides

Organic silicon compound surfactant of pesticides include a range of structural types. They are not like many commonly used surfactants with linear structure, instead they are t-shaped structure. They are all made up of methylated siloxanes skeleton with a or more polyether tail. Surfactants as an adjuvant in pesticide not only improve the effect of pesticide use, but also reduce the amount of pesticides, reducing the impact of pesticides on the environment, and bring huge benefits for agricultural production.
Processing of pesticide formulation can not be without surfactant, they need to add different types of surfactants. The addtion of surfactant greatly reduces surface tension of solution. Currently the applied in use pesticide surfactants mainly are fatty alcohol polyoxyethylene, alkyl-phenol polyoxyethylene ether, sulfonate, sulfonic acid ester, amide, silicone, etc. Pesticide surfactant itself had no insecticidal and fungicidal effect, but its emulsifying properties and their exhibition will affect the efficacy of pesticides. At present, the main difference of the ingredient and the same domestic agents is that the agent of surfactant in the application.

Silicone additives for its good agro-silicone additives have good exhibitions, permeability. It has increased efficiency, labor-saving, water conservation, and provincial drug features in the spraying of pesticides. Agricultural spray silicone additives can help increase yields and reduce the adverse effects of pesticides on the environment, which can allow spraying agricultural chemicals have a better efficacy, spreads more easily and absorbs quickly and is not easy to be washed down.

Specifically, these additives can make solutions containing pesticides, growth regulators and other chemical are easier to penetrate plant surfaces. This ability to spread meant that only a small amount of spray can get the spray effect. At the time of spraying pesticides, it can save up to 50% of water. This can reduce waste, reduce the losses to the amount of pesticide in the soil and groundwater, thereby reducing pesticide residues in the environment.

On the biological effect of some surfactants such as cationic surfactants, which itself has a bactericidal effect. People take advantage of the nature develop herbicides, plant growth inhibitors. Saponin is a good non-ionic surfactant is a botanical insecticide. 12 alkyl benzene sulfonic acid sodium salt (potassium) has a strong effect of lysozyme, it is available to a wide spectrum of chemical sterilization bacteriolytic effect of fungicides when it combined with organic nitrogen compounds with biological activity. But not all surfactants are used in pesticides, since some surfactant of pesticides have a phytotoxic effect on crops. Therefore pesticide use of surfactant in addition to depending on the original drug choices, but also take into account its impact on the crop. Click here!

Silicone surfactant used in agriculture

Surface tension of silicone surfactant is 2.57x10-4N/cm, it is a good nucleating agents. Silicone surfactant used as pesticide adjuvant began in the 20th century, and it has attracted attention in the national economy, but only in the 1980s began the commercial application in agriculture. A wide range of biochemical and physiological tests and subsequent field studies confirm, , the first silicone surfactant L-77 in the world (also known as S]iwet m) is the best additives to control gorse glyphosate herbicide for grass.
Silicone surfactant for pesticide additives is a t-shaped structure, it made up entirely of methylated siloxanes skeleton. Skeleton of hydrophobic and flexural properties of siloxane backbone exposure to methyl interface. The hydrophobic of methyl is better than the methylene, and methylene is the main composition of the majority commonly used non-ionic hydrophobic hydrocarbon surfactants. The hydrophilic part of silicone surfactants are most like the commonly used non-ionic surfactant. Its hydrophilic can be eased by by embedding smaller polar isopropyl ether (PO) units. Overall polarity of surfactant can be adjusted by replacement ratio of dimethyl siloxane unit.

General speaking, the silicone surfactant is mostly spray conditioner. Because of their strong activity, it sometimes also is used as Activator. Application of silicone surfactants can improve leaf's ability of absorb when spray liquid through the leaf pores, therefore it is necessary to study their characteristics in spray.

The ultimate goal of herbicides, plant growth regulator and nutrient is in plant tissues, and silicone surfactants can enhance pesticides absorption of foliar, which is meaningful in improving pesticide efficacy and reducing the dosage. So far, silicone surfactant for adjuvant of pesticide research work mostly for herbicides. Researches also include insecticides, fungicides, growth regulators and foliar application of agents and other fields.

L-77 can overcome the drug resistance of grass to 2-chloro-, indicating that it is cost-effective and rational agents, but conventional surfactant does not have this property. This makes sense for the mix-use of silicone surfactants and selective herbicides. S309 can improve picloram and 2-4 drops of mixtures effect on the black spruce and the firs, while the L-77 mixed with ethyl chloride of grass plus dicamba synergism on the control of black spruce, but has no effect on controlling plastic firs. In addition to chemical herbicides, L-77 used for microbial herbicides for control has good effect on controlling of weeds of Fern. If you have interest, please read more here!

C5/C9 of petroleum resins

Petroleum resins are very widely used, it has better solubility with natural rubber, it can also be used as a modifier in addition. Petroleum resin is derived from petroleum, thermoplastics, high aromatic hydrocarbons, non-reactive hydrocarbon resin. Polymerization catalyst usually made of aluminium trichloride, boron fluoride or sulfate (see acid-base catalyst), polymerization temperature 0~100℃. According to the different polymerization conditions, petroleum resin have different softening points ranged from viscous to solid state, color from pale yellow, amber to black, relative density is (15) 0.98~1.06, refractive index is 1.53~1.60.

Petroleum resins have good of mixed dissolve property with synthetic rubber and the other synthetic resin. softening points of 30~60℃ of petroleum resin is used as stick agent or dhesive of synthetic rubber and natural rubber, softening points of 60~130℃ petroleum resin is used as incremental agent of printing ink, as well as paper of rubber material, waterproof cloth of waterproof agent, etc. The raw materials of petroleum resins are rich, the production cost is low, but it has wide range of uses.

In recent years, China's carbon five (C5) petroleum resins industry is rapidly developed, both production capacity and technology are developing by leaps and bounds. According to statistics from CMS information, the production capacity of C5 petroleum resin is from 300,000 tons to 500,000 tons in 2011, and there are still many enterprises in production or expansion.

The exports of petroleum resin 16394 tons in March, and our country has become a petroleum resin exporter. China is rich in production capacity of ethylene, and there is relatively abundant raw materials pyrolysis C5. With the improvement and popularization petroleum resin technology, more and more enterprises have the capacity of production and processing of petroleum resin, and the production capacity of petroleum resin is expanded.

Continued but low growth in oil consumption in China, dependence on foreign is 60.6%. Data show that China's oil apparent consumption was estimated at 543 million tones in 2015, it increased 25 million tons compared with the previous year. Domestic ethylene production increases supported petroleum resin market of carbon five and C9, the Mainland of China ethylene production capacity is 15 million tons in 2010, the production is 13.8 million tons, by-product carbon five's output is 180 tons and carbon nine production is 1.4 million tons. If you have interest, click here to get more!

Production of petroleum resin

Petroleum resin is a petroleum by-product of pyrolysis of C5 and C9 fractions. It is a thermoplastic resin manufactured by preprocessed, aggregated, distillation and other processes. Petroleum resin is not a polymer, but oligomers with molecular weight of 300-3000. According to the raw material, petroleum resin are divided into aliphatic resin (C5), cycloaliphatic resin (DCPD), aromatic resins (C9), aromatic/aliphatic resin (C5/C9) and hydrogenated petroleum resin. Hydrogenation of C5 petroleum resin, C9 hydrogenated petroleum resin.

Petroleum resin can be used in the production of paint and road marking paint. In the production of primers, it increases temperature resistance and water resistance. Mid-range Paint saves not only 10% vegetable oil, but also improves the coating film luster, water resistance and resistance to acid and alkaline.

Petroleum resin as ingredients mixed with natural rubber in a solvent to make pressure-sensitive adhesives, it has low reactivity, and can maintain the viscosity under heating. Petroleum resins for printing ink are mainly high softening point C9 petroleum resin and DCPD resins. Add petroleum resin to ink has the effect of quick-drying, brightening, improve printing performance and so on.

Petroleum resin mainly used in paint industrial, for example, petroleum resin emulsion is used as enhanced synthesis latex paint; light petroleum resin is used for manufacturing oily varnish to improve gloss and adhesion; low softening points of resin is used for rubber of plasticizer, and high softening points resin is used to improve hardness of synthetic rubber. Petroleum resin and chlorinated surfactants can compose of architectural coatings, it is also widely used in printing inks, paints and adhesives, oil additives and other raw materials.

Because of the raw materials and technical constraints, part of the ethylene production capacity lags behind States can not produce petroleum resin by themselves. They rely heavily on imports to meet its domestic traffic paint and adhesives industry needs. Main imports national are India, Thailand, Malaysia, Indonesia, Viet Nam, etc, accounted for half around of China petroleum resin export volume. In additional, Europe, Japan and Korea are also main country of China petroleum resin export. After the fast development of United States page rock gas, petroleum resin of production raw materials cracking C5 and C9 production reduced, as a result, imports petroleum resin from China became important channel. Click here!

Polyurethane and resin in industry

Two-component polyurethane adhesive one of the most important category in polyurethane adhesives. It is widely used and usually made up of two components. But the two components packaged separately. It needs use according to a certain proportion. Polyurethane resin as a high strength and tear resistance, wear-resistant properties of polymer materials is widely used in daily life. The daily use of polyurethane are as follows: furniture industry; household appliance; construction; transportation; shoes and leather; sports industry; etc. It used for the preparation of polyether polyurethane. Aggregate method with different material nature.

Polyurethane in industry are widely used also. For example, Polyurethane slurry used as coating for preparation of polyurethane synthetic leather, artificial leather. 
Polyurethane synthesis leather has gloss, soft, natural, and strong sense of leather appearance. It is the most ideal alternative to natural leather products, etc. So it is widely applied to clothing, shoes, bags, furniture, and sports industry.

The excellent performance of spandex are highlight of high back elastic for its fracture elongation rate is greater than 400%. Spandex has been widely used in the textile, it is a new textile materials with high added value.

Polyurethane adhesive has a strong polarity and chemical activity of-NCO-(isocyanate),-NHCOO-(carbamate groups). With excellent shear strength and impact resistance properties, it suitable for all kinds of structural bonding area and has excellent flexibility characteristics. Besides, polyurethane adhesive with excellent rubber properties, because it can adapt to different thermal expansion coefficient of substrate adhesion. It forms a soft-hard transition layer between the substrate. This not only has strong adhesion, but also has excellent cushioning and shock absorption function.

By the way, here is something about resin. Resin is often used to describe heat softening or melting range, it has a tendency to flow under external force when softening. It is solid or semi-solid at room temperature, sometimes it can be liquid polymer. Broadly speaking, any polymer that can be used as plastics processing materials are known as resin.

Resin is main raw materials of manufacturing plastic, it also used to make paint, binder and insulation material. Resin is main film material of paint, such as alkyd resin, acrylic resin, synthesis fatty acids resin. Synthetic resins are widely used in separation and purification of impurity in liquid in the industrial production. Read more here!

Polyurethane coating in the application

Polyurethane material is a new organic polymer material, known as the "fifth largest plastics", due to its excellent performance and it is widely used in many fields of the national economy. Application fields are light industry, chemical industry, electronics, textiles, medical, construction, building materials, automotive, defense, aerospace, aviation, and so on.

Polyurethane resin as a high strength and tear resistance, wear-resistant properties of polymer material is widely used in daily life, industry, agriculture, medicine, and other fields. Polyurethane elastic used as belt, hose, car parts, soles, synthesis leather, wire cable and medical artificial organ. In additional, polyurethane can be made into emulsions, magnetic materials, etc.

Polyurethane resin gel is an ambient curing two-component, low viscosity, low odor, soft, transparent glue developed by polymer. It is suitable for epoxy glue by hand and machine.

Polyurethane coating is a common type of coating, and it can be divided into two-component polyurethane coating and one-component polyurethane coating. Two-component polyurethane coatings are generally is composed of isocyanate prepolymers (also known as low molecular weight polyurethane polymers) and hydroxyl-containing resin, commonly it is referred to as curing agent component and the base component. This type of coating has a very wide application, according to the different components of hydroxyl group, it can be divided into acrylic polyurethane, alkyd urethane polyether and polyester polyurethane, polyurethane, epoxy, polyurethane and other varieties. Generally they have good mechanical properties, high solids content, all of the performances are quite good.

It is currently a kind of promising coating. Main applications are wood coatings, automotive refinishing coating, anti-corrosion coating, floor coating, e-coating, special coatings, polyurethane waterproofing coatings and so on. But it need complicated procedures and very high standards for construction. One-component polyurethane coating mainly are polyurethane coating, moisture curing polyurethane coatings, sealed Polyurethane coatings and other varieties. But the application and its overall performance is not wider than two-component coatings, mainly for floor coatings, anti-corrosion Coatings, coil coatings, etc.

Features of polyurethane coating of okchem are excellent wear resistance; excellent chemical resistance and oil resistance; adhesion; low-temperature curing performance; high decorative properties; diversity performance and scalability. Through the improved formulation can be made into polyurethane coating membrane high hardness coating as well as good flexibility elastic coating; environmentally friendly low VOC coatings, etc. Read more!

Special effect pigments in powder coatings

Since powder coatings have no volatile organic compounds (VOC) emissions, and the characteristics of high performance and durable. They are more widely used in Europe, America and Asia-Pacific markets. Powder coating can be applied in the finishes of high light, low light, plain light and metallic, and the color is not restricted. Special effect pigments can create a unique, dazzling visual effects for powder coating. In fact, they are suitable for all resin systems. Many of them can also be used in outdoor durable coatings and industrial coatings.

Special effect pigment has following three advantages: a. this pigment can creat optical shades unpredictable illusion, for example, pearl pigment applied to car paint can observe this phenomenon; b. this pigment can produced to elusive of with angle different color attract eye of surprised color effect, for example, it can be used in car paint or decorative sex printing; c. this pigment can simulate natural pearl effect and applied to buttons, plastic bottles and many other decorative objects. Effect pigments in the automotive paint are mainly aluminium powder, Pearl powder, nano-titanium dioxide and graphite powder.

Because the composition of the powder coating is a 100% solid with little or no waste, so it is efficient. It does not require a solvent system. If necessary, spray booth can be built in a relatively small space. And the transmission and curing equipment can be switched with each other, liquid paint system can be easily replaced by powder coating system. Replacement of liquid transfer systems require cost, but this can quickly recoup their investment by increasing efficiency.

The biggest market of effect pigment is in architectural coatings include aluminum building sheet and curtain wall panels. Gray metallic is the most commonly used in the field of color. This color can be available in conjunction with black or gray powder paint with topical white Pearlescent pigments. MICA effect pigment is cheaper and more durable alternatives in Aluminum powder pigment. Metallic pigment needs to cover a layer of varnish to increase durability and reduce gloss. However MICA effect pigment does not need to cover a layer of varnish. Because it is chemically inert.

Effect pigments can be mixed use with transparent coloring agent to get different colors. Powder coatings one of the fastest growing top-coat paint in coatings industry. With the increase of amount of powder coatings, effect pigments also increases. Researchers are constantly working to develop new products to improve powder coating technology.Click here to get more!

Varieties of inorganic pigments in use

Inorganic pigments include a variety of metal oxides, chromium salts, carbonates, sulfates and sulfides. For example, aluminum, copper, carbon black, zinc white and titanium white are all belong to inorganic pigments.

Main varieties of black pigments are carbon black. Main quality index of carbon black pigment is black and hue. Classification of carbon black by processing methods is variety. Carbon black not only has the coloring properties, but also has excellent weatherability and resistance to thermal oxidation.

Red paint of inorganic pigments mainly is iron oxide red. Iron oxide has a variety of colors, from yellow to red, brown and black. Iron oxide red is the most common iron oxide pigments. It has very good hiding power and tinting strength, chemical resistance and color retention, etc. Because of significant good rust resistance, iron oxide red is used for the production of floor paints and marine paints.

Currently available for auto paint inorganic pigments include titanium dioxide, carbon black, iron oxide, bismuth vanadate yellow, mixed metal oxide pigments as well as flash aluminum Flake pigment and mica pearl powder. After coating and other surface treatments, chromium yellow (PY34) and molybdateorange (PR104) are suitable for automotive coatings in terms of its weather resistance and light resistance performance, but because of toxicity, they are no longer used in automotive coatings. Meanwhile, cadmium red is also disabled on the same grounds.

Bismuth vanadate yellow is a commercialization of an inorganic yellow pigments (PY184) in the 1980s. Its chemical composition is BiVO4/nBi2MoO4, close to lemon yellow hue. It is main features are very low toxicity, bright and clean of color, good heat resistance, weather resistance, light resistance, resistance to chemicals and solvents. Its very good covering power is similar to titanium dioxide with high tinting strength, it is the ideal nontoxic substitute of chrome yellow pigment. But its disadvantages are high density and precipitation.

Mixed metal oxide pigment is a kind of inorganic pigments with an excellent chemical stability. In the crystal structure of stable metal oxide, nonferrous metal ions can show its color. Different oxides compositions can have different colors, such as titanium-nickel yellow (PY53,NiO • Sb2O3 • 20TiO2) antimony, chromium titanium Brown (PBr24,Cr2O3 • Sb2O3 • 31TiO2), cobalt blue (PB28,CoO • Al2O3) and CU-CR-black (PBk28,CuO • Cr2O3), etc. Such pigment is characterized by a very good resistance to high temperature, acid, alkali, lightfastness and weatherability, drawback is the low tinting strength, certain varieties of dispersion is not good enough. They are mainly used for ceramics and enamel colouring, coating is mainly used for high temperature resistance and coil coatings. It is available in light metallic base coat in automotive finishes. Read more!

Use trend of inorganic pigments

Inorganic pigments are pigments based on natural minerals or made by inorganic compounds. Generally, they are low purity, darker color, but at a low price. They are widely used in paints, plastics, synthetic fibers, rubber, construction materials, stationery, paint, ink, paper, glass, enamel, ceramics and other industrial sectors.

In the early 80s, inorganic pigments production capacity is 3.6Mt in the world, including: titanium dioxide is 74%, iron oxide pigments is 14.6%, chrome is 5%, anticorrosive pigment is 4.6%, chrome Green is 1%, cadmium pigments is 0.2%, etc. The annual production capacity of novel compound dye has risen to 10Kt. China inorganic pigment manufacturers are more than hundred, total output is above 200Kt.

Pigments are divided into organic pigments and inorganic pigments. Organic pigments made from pigments extracted from plants, it contains no harmful elements, which belongs to the green pigment. Inorganic pigment extract pigments from minerals, such as selenium, cadmium, chromium, etc.

Basic optical properties and dyes properties of inorganic pigments mainly determined by the following three aspects:

a. difference in refractive index between pigments and dispersion medium;
b. the light is absorbed by the solid (including impurities in solids);
c. particle size and particle size distribution. The particle size and particle size distribution can be improved by surface treatment.

In paint production process, however fine pigment powder, there will always contain some aggregation and flocculation of particles. Due to compression or moisture, pigments will be further cemented flocculation of particles in the course of transport and storage. If an appropriate surfactant treatment, these flocculation of particles can easily be dispersed in use.

Tendency of research and development of new inorganic pigments in recent years are:

1. develop complex pigments, such as light blue (CoO • Cr2O3• Al2O3), titanium-nickel yellow (TiO2 • NiO• Sb2O3) and so on. Add oxides of chromium, cobalt, iron and zinc to nickel titanium, antimony salts can make yellow, green, blue, brown, etc pigments that are high temperature resistance, durability, chemical resistance and low toxicity to nontoxic. They are bright and have excellent performance, can be used for building materials, paint, plastics coloring and paint preparation.

2. develop surface treatment technology of pigment particle, form a layer of color film as inorganic compounds or organic pigment on the particle surface, it can change the surface properties of pigment particle, improve light resistance, heat resistance, wetting properties, expand applications and improve value.
3. make manufacture pigments to save a lot of abrasive machining costs. If you want to know more, click here!