What is calcium stearate? Calcium stearate, white powder, insoluble in water, cold ethanol and ether, in hot benzene, benzene and turpentine and other organic solvents, slightly soluble in hot ethanol and ether. It decomposes slowly when heated to 400 ℃, is flammable, and decomposes into stearic acid and corresponding calcium salt with hygroscopicity in case of strong acid.
Synthesis of calcium stearate 1. Preparation of sodium stearate solution Dissolve stearic acid in hot water 20 times (mass), add caustic soda solution with the content of 1074kg/m3 (10 ° B é), and saponify at about 75 ℃ to generate dilute sodium stearate solution 2. Synthesis of calcium stearate Add the calcium chloride solution with the content of 1074kg/m3 (10 ° B é) to the above-prepared sodium stearate solution, perform the double decomposition reaction at about 65 ℃, and the product calcium stearate is precipitated, filtered, washed, and dried at about 90 ℃ to obtain the finished product 3. Suspend 5.60g (0.1mol) of calcium oxide in 300mL of hot water at 55 ℃. Then dissolve 51.3g of chemically pure stearic acid in 350mL of hot water at 70 ℃, add 0.75g of diethanolamine, and stir to emulsify it. Gradually add the prepared stearic acid lotion to the calcium oxide suspension within two h, fully stir to filter out the insoluble white matter calcium stearate, and dry to obtain the product.
Use of calcium stearate It is a non-toxic heat stabilizer for PVC and has excellent lubricity. Its heat stability effect is not as good as barium stearate, lead stearate, tin stearate and cadmium stearate. However, it is cheap and easy to get, with low toxicity and good processing performance. It synergizes with zinc soap and epoxy compounds and can improve heat stability. It is commonly used in food packaging film, medical appliances and other soft products that require non-toxic requirements. It is also used in hard products with basic lead salt and lead soap, and It can improve the speed of gel. This product is used in polyethene and polypropylene to eliminate the adverse effect of residual catalysts on the colour and stability of resin. It is also widely used as a lubricant and release agent for thermosetting plastics such as polyolefin, polyester-reinforced plastics, phenolic resin, amino resin, etc. The disadvantage of this product is that it has initial colouring. When heated at above 100 ℃ for a long time, it will turn white PVC plastic reddish, especially when there is titanium dioxide in the formula, and the colouring is particularly serious. When this product is large, there is segregation and scaling.
Price of calcium stearate Calcium stearate particle size and purity will affect the product's price, and the purchase volume can also affect the cost of calcium stearate. A large amount of large amount will be lower. The price of calcium stearate can be found on our company's official website.
Calcium stearate supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including calcium stearate, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective calcium stearate, you are welcome tocontact us or inquire any time.
