PVC lubricant stabilizer calcium stearate dispersion with factory price CAS 1592-23-0,China price supplier

Calcium stearate

        · White light crystalline powder. 

        · Chemical formula (C17H35COO)2Ca. 

        · Molecular weight 607.00. High melting point of 179 ~ 180 ℃, the thermal decomposition. 

        · Insoluble in water, cold ethanol and ether, soluble in hot benzene, toluene and turpentine, slightly soluble in hot ethanol and ether. 

        Decompose to stearic acid with strong acid and corresponding calcium salt. It absorbs water in the air. Resistant to lipolytic microorganisms. Pyrolysis produces stearone and hydrocarbon. Non-toxic. Industrial products are often mixed with the corresponding oleate. Used as a stabilizer and lubricant for PVC; As halogen absorbent in polyethylene and polypropylene; Lubricants for polyolefin fibers and moulding products; Lubricant and mold release agent for thermosetting plastics such as phenolic and amino; Thickening agent for grease; Waterproof agent for waterproof fabric; Paint polish and pencil lubricant, etc. Food grade calcium stearate is used as an anti - coagulant. The liquid soap is prepared by reaction of baking stearic acid with sodium hydroxide and calcium chloride.

        This product can be used as heat stabilizer of polyvinyl chloride with excellent lubricity. Its thermal stability is not as good as that of barium stearate, lead stearate, tin stearate and cadmium stearate. But cheap and easy to get, low toxicity, good processing. It has synergistic effect with zinc soap and epoxy compound, and can improve thermal stability. It is often used in soft products with non-toxic requirements such as food packaging film and medical appliance. The gelation rate can be improved when used with base lead salt and lead soap in hard products. Calcium stearate can be used in polyethylene and polypropylene to eliminate the adverse effect of residual catalysts on the color and stability of the resin. The product is also widely used as a lubricant and film release agent for thermosetting plastics such as polyolefin, polyester reinforced plastics, phenolic resins and amino resins.

        The disadvantage of calcium stearate is the initial coloration, above 100 ℃ heating time is longer, can make the white PVC plastic into a reddish, particularly in the formula in the presence of titanium dioxide, shading is particularly acute. At this time, if 0.06 ~ 0.12%Na2CO3 or 0.09 ~ 0.19NaHCO3 is added, this defect can be overcome, but because these substances are too alkaline, they are not used in practice. In addition, the amount of this product, segregation and scaling phenomenon.

      Usage

        Non-toxic stabilizers, lubricants, demoulding agents and textile waterproofing agents for PVC and ABS plastics.

        Also Used as water repellent, lubricant and plastic additive. Widely used in food, medicine, cosmetics, plastic rubber and other industries, mainly used as lubricant, emulsifier, stabilizer, release agent, accelerator, cosmetics base materials and so on. 

       The speed of condensation can be increased in rigid plastic products. Can also be used in food packaging, medical devices and other non-toxic soft film, at the same time has stabilizer effect, long-term stability is better. In polyethylene, polyvinyl chloride stabilizer and lubricant, as halogen absorbent in polyethylene and polypropylene, the adverse effect of residual catalyst on resin color and stability can be eliminated. 

       It is widely used in foreign countries to improve the heat resistance of plastics and improve the initial coloring and permeability of climate resistance, which will replace the toxic stabilizer with the same properties.