Process for producing sugar-plum-shaped particle

摘要

To obtain a sugar-plum shaped composite particle, a reaction vessel with 300 parts by weight of water placed therein is charged with 30 parts by weight of polymethyl methacraylate resin particles of 2 μm average particle diameter, and ultrasonic waves are applied to the mixture for 1 minute to obtain a particle dispersion liquid. Subsequently, 15 parts by weight of methyltrimethoxysilane is added to the dispersion liquid to obtain methyltrimethoxysilane hydrolyzates in the dispersion liquid. Thereafter, 10 parts by weight of 1 weight % aqueous ammonia is added thereto and agitated. One minute later, the agitation is discontinued, and the mixture is allowed to stand still for 10 hours to effect maturation. The resultant mixture is filtered and dried to obtain sugar-plum-shaped particles provided on their surfaces with polyorganosiloxane projections.

主权项

1. A process for producing the sugar-plum-shaped particles, wherein the process consists of dispersing 10 to 100 parts by weight of an organotrialkoxysilane and/or an organotrialkoxysilane hydrolysate and 100 parts by weight of organic resin particles in water to form a reaction solution,
then, before the organotrialkoxysilane and/or an organotrialkoxysilane hydrolysate undergoes a dehydration condensation reaction, adjusting the pH of the reaction solution to 8.0 to 10.5 by adding an alkaline substance or an alkaline aqueous solution to the reaction solution, and then precipitating particles having polyorganosiloxane projections on surfaces of the organic resin particles.