Preparation method and technology of aqueous dispersion of calcium stearate


Because of its good lubricity, calcium stearate is widely used in paper-coating lubricants and PVC thermal stabilizers. It can also be used as a smooth agent and water repellent in coating production. With the rapid development of plastics, coatings, and paper machine petrochemical industry, calcium stearate demand is increasing yearly, and the market prospects are still promising. Calcium stearate has water-insoluble properties, is used as a lubricant to increase its dispersion uniformity and good mobility, and is generally made into water-based dispersion. Add 33.63kg water, 55g sodium tripolyphosphospic acid, 40g urea, 750g fatty alcohol polyoxyethylene ether, 370g twan-80, and 40g polydimethylsiloxane defoaming agent into the reaction kettle, and stir at the mechanical stirring speed of 1000r/min until the emulsifier is wholly dispersed and uniform, then stop going, and add 15kg calcium stearate powder. Then the stirring speed was 10000r/min until the calcium stearate powder was moistened. The moving rate was reduced, and the stirring speed was 5000r/min for 30min. Then 50g polydimethylsiloxane defoaming agent and 65g isothiazolinone preservative were added. The aqueous dispersion of calcium stearate with a viscosity of 120mPa·S, an average particle size of 5μm, and a solid content of 30wt% was obtained through a 1000 mesh ultrasonic vibrating screen. If you are looking for high quality, high purity and cost-effective water-based calcium stearate, or if you require the latest price of water-based calcium stearate, please feel free to email contact mis-asia.

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