Description

Zinc stearate is a white, non-toxic, water-repellent powder that functions as a lubricant, release agent, and anti-caking agent in various industries including plastics, rubber, and cosmetics. As a zinc salt of stearic acid, it is used to improve the spreadability and texture of cosmetic products like foundations and sunscreens, while its hydrophobic (water-repelling) properties provide moisture resistance and protect surfaces. 

Properties 

• Appearance: A fine, white, fluffy powder.
• Odor: A slight, characteristic fatty acid odor.
• Solubility: Insoluble in water, alcohol, and ether.
• Hydrophobic: Repels water, making it resistant to moisture.
• Stability: Stable under high temperatures.

Common Uses

• Plastics and Rubber:

Acts as a mold release agent and lubricant, preventing sticking during manufacturing. 

• Cosmetics:

Used as a thickening agent, lubricant, and oil-absorbing ingredient to improve texture, viscosity, and reduce shine in pressed powders, foundations, and sunscreens. 

• Paints and Coatings:

Functions as a dispersing agent, sealer, and moisture protector. 

• Other Applications:

Impregnated on playing cards for a smoother feel and used as a separating agent in metallurgy. 

Production

Zinc stearate is typically produced by combining stearic acid with zinc oxide.