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What is the difference between calcium stearate and zinc stearate?
Release Time:
2023-03-09
Many users confuse zinc stearate and calcium stearate. The main difference is that zinc stearate is mainly used as a lubricant, and calcium stearate is mainly used as a heat stabilizer for polyvinyl chloride. Zinc stearate is supplied below The editor will introduce the differences in detail for you:
Many users confuse zinc stearate and calcium stearate. The main difference is that zinc stearate is mainly used as a lubricant, and calcium stearate is mainly used as a heat stabilizer for polyvinyl chloride. Zinc stearate is supplied below The editor will introduce the differences in detail for you:
Calcium stearate is uniform fine white powder. Soluble in toluene, ethanol, benzene and other organic solvents, insoluble in water. When heated to 400°C, it decomposes slowly, is flammable, and decomposes into stearic acid and the corresponding calcium salt in case of strong acid. It is hygroscopic and non-toxic. It is used as heat stabilizer for polyvinyl chloride, lubricant for various plastic processing, release agent, etc. In hard products, it can increase the gelation speed when combined with basic lead salts and lead soaps. Also used in food packaging, medical appliances and other non-toxic soft films and appliances. It can also be used as a halogen absorbent for polyethylene and polypropylene to eliminate the adverse effects of residual catalysts on color and stability. As a plasticizer in rubber processing, it can soften natural rubber and synthetic rubber, but has little effect on vulcanization. It is also used as a lubricant for polyolefin fibers and molding compounds, a thickening agent for grease, a waterproofing agent for textiles, a flatting agent for paint, and a plasticizer in the manufacture of plastic records. It is also used in the production of pencil leads and in the pharmaceutical and spice industries.
Zinc stearate is a white powder, non-toxic, non-hazardous, absorbent, and has good adhesion to the skin. Insoluble in water, ethanol, ether, soluble in hot ethanol, turpentine, benzene and other organic solvents. It decomposes into stearic acid and its corresponding salts in case of strong acid. It is flammable in dry condition, and its ignition point is about 900°C. The mixture of dust and air may explode in case of open fire, and the lower explosion limit is 11.6g/m3. It is mainly used as lubricant and release agent for styrene resin, phenolic resin and amino resin. At the same time, it also has the functions of vulcanization active agent and softener in rubber.
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