Zinc Stearate is a chemical substance that has a white, fluffy, powdered appearance and is usually formed from a combination of Stearic acid and zinc oxide. It does not have a strong odour, although traces of a slight fatty acid scent are not uncommon Zinc Stearate is a compound of long-chain fatty acids with Zinc attached to it. Zinc Stearates are insoluble in polar solvents (like alcohol & ethers), but more soluble in in aromatic compounds and chlorinated hydrocarbons when heated.
It is the most powerful release agent among all metal soaps. It contains no electrolyte and has a hydrophobic effect. Because of this versatility, this substance is used by many different types of companies, from plastic industries to concrete manufacturers. It is used extensively in colour concentrates as a dispersion aid.
Its main application areas are the plastics and rubber industry where it is used as a releasing agent and lubricant which can be easily incorporated. These applications exploit its “non-stick” properties. In cosmetics, zinc stearate is a lubricant and thickening to improve texture. It is an “activator” for rubber vulcanization by sulphur and accelerators.
