Calcium stearate is an organic compound with a molecular formula of C36H70CaO4. It is a white powder, insoluble in water, and also can be utilized as a waterproofing agent, lubricating substance, as well as plastic additive.
Calcium stearate is a calcium salt stemmed from calcium oxide and stearic acid that is commonly found in cosmetics, plastics, as well as foodstuff. There are both advantages and disadvantages of making use of calcium stearate.
Synthesis of calcium stearate
1. The synthesis of calcium stearate. The calcium chloride service with a material of 1074kg/m3 (10°& deg; Bé) is included to the sodium stearate service prepared over, and the metathesis reaction is executed at concerning 65°& deg; C. The item calcium stearate is Rainfall divides out. Then it is filteringed system, washed with water, and dried at concerning 90°& deg; C to acquire the ended up item. 2. Put on hold 5.60 g (0.1 mol) calcium oxide in 300mL, 55 ℃ warm water. Then liquify 51.3 g of chemically pure stearic acid in 350mL of warm water at 70°& deg; C, add 0.75 g of diethanolamine, as well as stir to emulsify it. The prepared stearic acid emulsion was progressively contributed to the calcium oxide suspension within 2h, and completely stirred, the created white insoluble matter, particularly calcium stearate, was filtered out and also dried out to get the product.
3. In the straight approach, include a particular amount of stearic acid and CaO to a response pot equipped with a stirrer as well as a thermometer, warm it to melt, gradually add the stimulant H2O2 under constant mixing, as well as use a vacuum cleaner to manage the response temperature at 140-150°& deg; C. The response time is 1.5 ～ 2.0 h. After the response is finished, the product is discharged, cooled down, as well as crushed to acquire the product.
4. Metathesis technique: Liquify stearic acid in 20 times the mass of warm water, add saturated caustic soft drink service, and perform saponification response at regarding 75°& deg; C to produce thin down sodium stearate solution. Then the calcium chloride service with a web content of 1074kg/m3 was contributed to the salt stearate solution, and also the metathesis reaction was carried out at regarding 65 ℃, and also the item calcium stearate was sped up out. Then it is filtered, washed with water, as well as dried out at regarding 90°& deg; C to acquire the ended up item.
Calcium stearate application Calcium stearate can be utilized as a warm stabilizer for polyvinyl chloride, a lubricating substance for a variety of plastic handling, and also a mold release representative. In hard items, blending with fundamental lead salt and also lead soap can increase the speed of gelation.
Calcium stearate is additionally made use of in safe soft films and devices such as food packaging as well as clinical appliances. Calcium stearate can additionally be utilized as a halogen absorbent for polyethylene and polypropylene to get rid of the adverse impacts of residual catalyst on shade as well as stability.
In rubber processing, calcium stearate is used as a plasticizer, which can soften natural rubber as well as artificial rubber, yet has virtually no impact on vulcanization. It is additionally used as a lubricating substance for polyolefin fibers and molding substances, a thickening agent for grease, a waterproofing representative for textiles, a flattening representative for paints, and a plasticizer in the manufacture of plastic records. Made use of as halogen absorbent in polyethylene and polypropylene; lubricant and release representative for thermosetting plastics such as phenolic as well as amino; enlarging representative for oil; waterproofing representative for water-proof material; flattening agent for paint and lubricant for pencil lead. Food-grade calcium stearate is utilized as an anticaking agent.
Calcium stearate is also used in pencil lead production, medication, and the fragrance industry.
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