Propylene glycol used in coatings and cosmetics

Propylene glycol in the pharmaceutical industry used to dissolve many drugs such as sulfa drugs, local anesthetics, vitamin d, vitamin a, chloramphenicol and many essential oils. For its very nature basically identical to the glycerol, but its viscosity, toxicity and irritation is smaller than glycerol. A certain proportion of propylene glycol and water mixture can slow the hydrolysis of certain drugs and increase its stability.

Before using propylene glycol, it should distinguish whether it is industrial grade or not. Because of its low freezing point, it can any mix of propylene glycol and water. This can greatly lower the freezing point of paint overall, as well as enhances the frost resistance of coatings. As a result, it often used as antifreeze in coatings. It can make the coatings not freezing at 0 degrees. Because of the good compatibility with water and other solvents and high boiling point, propylene glycol is easier to achieve balance in water-borne paint system. At the same time, it can also provide liquidity and slower drying of the coating.

Propylene glycol is an important raw material of epoxy resin, unsaturated polyester and polyurethane resin. The amount of about 45% of total consumption of propylene glycol. Large numbers of these unsaturated polyester is used in surface coatings and reinforced plastics.

Due to the propylene glycol and Spices has better solubility, thus it also used as solvents and softeners for cosmetics and so on. Propylene glycol is a very safe cosmetic raw material, but it often misunderstood that it has stimulus. Actually, its irritating feeling caused by the purity of raw materials. If using low purity propylene glycol, the impurities will cause irritation to the skin.

PG is mainly used for the production of paints and unsaturated polyester resins (UPR). Besides, it used as an antifreeze to replace ethylene glycol for antifreeze aircraft and as cooling agents in foods. In addition, there are also a large number of propylene glycol used in the production of plasticizers and hydraulic brake fluids. It can also be used for non-ionic detergent and in pharmaceuticals, pet food, cosmetics.

The main applications of propylene glycol stearate are as follows. It used for the manufacture of cosmetics cream in daily chemical industry. This to make cream increase lubricity, smooth and stable and has a moisturizing effect, such as lipsticks. More details!

Propylene glycol uses in a wild application

Propylene glycol is an important raw material of unsaturated polyester, epoxy resin, polyurethane resin, the amount is about 45% total consumption of propylene glycol. This unsaturated polyester are largely used for surface coatings and reinforced plastics. The viscous and hygroscopic of propylene glycol is good, and it is nontoxic. As a result, this product is widely used as hygroscopic agent, antifreeze, lubricants and solvents in the food, pharmaceutical and cosmetic industries.

In the food industry, propylene glycol reacts with fatty acid to have propylene glycol esters of fatty acids, this is primarily used as a food emulsifier; propylene glycol is and excellent solvent of pigments and condiment. Propylene glycol used in the pharmaceutical industry for manufacturing of various ointments, ointments solvents, softeners and excipients, etc. Due to the propylene glycol has better solubility with various spices, thus it also used as solvents and softeners for cosmetics.

Pharmaceutical grade propylene glycol is at the begining is major produced by United States Dow Chemical, United States Lyondell company. Later, Lyondell Korea factory transferred to SK Group, coupled with the sea shell factory in Huizhou. Currently, the major four brands are being sold. A certain proportion of propylene glycol and water mixture can slow the hydrolysis of certain drugs and increase its stability. When its concentration is appropriate as a solvent for injection.



Propylene glycol is also an important monomer to make excellent new polyester fiber poly Terephthalic acid dimethyl ester (PTT). Compared to PET ( polyethylene terephthalate), PBT (commonly known as Dacron polyester, chemical name is polyethylene terephthalate dimethyl ester ) fiber, PTT fiber has better performance. It has both high performance of PET and ease processing of PBT. Compared with conventional PET polyester fiber, such fiber of it's soft parts is propylene glycol rather than ethylene glycol. Therefore, it's soft parts of carbon-carbon chain is long, which makes the fiber itself is elastic and soft.

In the pharmaceutical industry, as its very nature basically identical to the glycerol, but viscosity, toxicity and irritation are smaller than glycerol, and good solubility, so it used to dissolve many drugs such as sulfa drugs, local anesthetics, sex hormones, vitamin d, vitamin a, chloramphenicol, and many essential oils. OKCHEM blog updates knowledge and information about chemicals and precise datas of China chemicals, if you have interest, please click here or visit OKCHEM.COM.

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