Stearic Acid is a well-known long-carbon, saturated fatty acid. It has the hydrophilic carboxyl group and both the lipophilic side of long carbon chain. Hydrophilic surfaces of nano-calcium carbonate are coated with stearic acid to enhance their lipophilicity. This material is useful for the bond between calcium carbonate and organic polymer molecules when it’s filled in plastics, rubber, inks, coatings, and advanced inks. This strong bond can give the product a bright surface and excellent reinforcement performance.
Calcium stearate (white powder) is insoluble in water, coldethanol, and ether. However, it can dissolve in organic solvents, such as hotbenzene. The product is easily combustible when it’s heated up to 400 degrees Celsius. In the case of strong acids, it decomposes to stearic acid or the equivalent calcium salt. These are hygroscopic.
Four methods of producing calcium stearate
1. This is the process of synthesising calcium stearate. Calcium chloride solution containing 1074kg/m3 (10°Bé), is then added to the sodium salt solution. To obtain the final product, it must be filtered.
2. Take 5.60g of calcium oxide (0.1mol) in 300mL. 55 heat water. Mix 51.3g chemically pure Stearic Acid in 350mL boiling water. At 70 degrees, stir and then add 0.75g Diethanolamine. Stir to combine. In 2h, slowly add the prepared Stearic Acid emulsion to the calcium dioxide suspension. After stirring, remove any insoluble matter (namely calcium stearate), and let it cool.
3. To make the reaction, add some stearic acid to a pot with a stirrer, a thermometer and heat to melt. Next, add the catalyst H2O2. Stir constantly and then apply vacuum to maintain the reaction temperature between 140 and 150. Reaction time: 1.5-2.0h. Once the reaction has completed, the material can be discharged and cooled to make the final product.
4. The metathesis method involves dissolved stearic in 20 times of the hot water mass, adding saturated caustic soy solution to dissolve it, then undergoing a saponification reaction at approximately 75°C to produce dilute sodium stearate. Next, add the 1074kg/m3 calcium chloride solution to the sodium-stearate mixture. After that, perform the metathesis reaction at approximately 65. Calcium stearate is precipitated. To obtain the final product, it must be filtered.
Buffalotours is also called Buffalotours Nano Technology Co. Ltd. and has over 12 years’ experience as a reliable global manufacturer and supplier of chemicals. The company manufactures a variety of stearic acids such as calcium stearate. lead stearate. aluminum stearate. We are available to assist you if required.