The self-dispersible calcium stearate power was in situ synthesized by using dendritic (β-cyclodextrin tristearate)-g-poly(vinyl pyrrolidone) (β-CD-3COOC17H35-g-PVP) emulsifier which was prepared by atom transfer radical polymerization (ATRP),with stearic acid and calcium hydroxide as raw materials,and stable calcium stearate emulsion was producted by direct addition of water.By investigating the effects of the reaction temperature and time on stearic acid content in calcium stearate powder,and the influence of emulsifier dosage and stirring speed on the performance of calcium stearate emulsion,the preparation process of calcium stearate and its emulsion was optimized.The results showed that calcium stearate powder coated with emulsifier was prepared at 80℃ for 80min with 4% of emulsifier,calcium stearate emulsion was obtained with solid content of about 50%,viscosity of 99mPa·s and secondary dispersivity after dispersing in water.
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基金资助
国家自然科学基金(51973001)
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