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Aluminum Stearate and Aluminum Bis-stearate

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Update time : 2019-10-18 09:49:37
Aluminum stearate is a toxic white or yellowish powder, insoluble in water, ethanol, ether, soluble in alkali, turpentine, mineral oil, petroleum, kerosene, and benzene. In the case of robust acid decomposition into stearic acid and the corresponding salt. It is used as a heat stabilizer and lubricant for polyvinyl chloride plastics, anti-settling agent, drier for paint industry, water repellent for fabrics, thickener for lubricating oil, etc. The stearate ion is a saturated fatty acid, and a small amount is almost harmless to the human body, but the aluminum ion is neurotoxic.
 
During the preparation of aluminum stearate, aluminum monostearate, aluminum stearate, and aluminum tristearate are obtained according to the amount of the aluminum salt. Among them, aluminum bis-stearate has the best performance and the most widely used.
 
Aluminum bis-stearate
 
Aluminum bis-stearate is a white powder, having a molecular weight of 610.93. CAS number: 300-92-5. The substance may be hazardous to the environment, and special attention should be given to the water body.
This product is low in toxicity and protected by general low toxicity chemical protection methods.
 
Storage method: This product is low in toxicity and protected by general low toxicity chemical protection methods.
 
Synthetic method: mixing molten stearic acid with excess sodium hydroxide solution to prepare a soap liquid, and then injecting a dilute aluminum sulfate solution into the soap liquid in the presence of an alkali solution, performing a metathesis reaction, washing; centrifuging; dehydrating to distearyl The crude product of hydroxy aluminum is finally washed and dried to obtain a finished product. Raw material consumption quota: 860kg/t stearic acid; 630kg/t aluminum sulfate (95%); solid alkali, (95%) 210kg/t.
 
 

The main purpose:
   1. Aluminum bis-stearate is used as a raw material for metal rust inhibitors, a waterproofing agent for building materials, a polishing agent for inks, a thickener for cosmetics, and the like. Aluminum stearate acts as a smoothing agent and thickener in the coating, and aluminum stearate also has the effect of improving the thixotropy of the coating film;
   2. Used as a waterproofing agent, plastic auxiliaries and lubricants;
   3. It is also used as a heat stabilizer and lubricant for PVC plastics, anti-settling agent, drier for paint industry, waterproofing agent for fabrics, thickener for lubricating oil, etc.
   4. Used as a lubricant release agent in oil field operations. Raw materials for metal rust inhibitors, waterproofing agents for building materials, polishing agents for inks, thickeners for cosmetics, etc. Aluminum bis-stearate is used as a smoothing agent and thickener in coatings, and also has the effect of improving the thixotropy of the coating film;
   5. Used as a powder raw material in cosmetics, used as a waterproofing agent, a lubricant, a thickener, and a powder surfactant.