Stearic acid is a high-level saturated fatty acid. The industrial product is in the form of red or yellowish granular. The pure product is a shiny red soft piece with a small amount of oleic acid and has a slight tallow-like odor. It rarely exists alone in nature. It exists in most animal and plant oils, often in the form of glycerides. For example, tristearate, especially tallow, is the most abundant. Stearic acid acts as an organic acid and alkali to generate sodium stearate. This soap is very slightly soluble in cold water, easily soluble in benzene, toluene, chloroform, carbon tetrachloride, carbon disulfide, amyl acetate, etc., and also soluble in ethanol and acetone. Its molecular formula is CH3CH2nCOOH and its main component is saturated acid with sixteen and eighteen carbons.
Use of stearic acid Plastic industry: widely used in the manufacture of PVC plastic pipes, plates, PVC heat stabilizers, profiles, and films. It helps prevent coking during processing. It is an effective heat stabilizer added in the processing of PVC film. It has good lubricity and good light and heat stabilization. Plastic PVC pipe. At the same time, it can prevent the discoloration of waste film caused by exposure to sulfide.
Cosmetics industry: used for emulsification in two types of skin care products: vanishing cream and cold cream. So that it becomes a stable and white paste. It is also the main raw material for making almonds and milk. Stearic acid soap esters are more widely used in the cosmetics industry.
Rubber industry: plays an important role in the synthesis and processing of rubber. This product is a vulcanization active agent widely used in natural rubber, synthetic rubber and latex. When making foam rubber, it can also be used as a plasticizer and softener. It is necessary to add stearic acid as an emulsifier during the production of synthetic rubber. Stearic acid can be used as a foaming agent, and stearic acid can also be used as a release agent for rubber products.