Nixon & Vanderhye P.C.
Method for producing polyorganosiloxane particles and for producing silica particles
The present invention provides a method for producing polyorganosiloxane particles through the step of hydrolyzing and condensing a silicon compound having a non-hydrolyzable group and a hydrolyzable alkoxyl group bonded to its silicon atom in the presence of a catalyst and thereby forming seed particles of polyorganosiloxane particles to obtain a seed-particles-containing solution and the step of adding a particle-diameter-growing aqueous solution containing the same silicon compound or a hydrolyzate thereof to the above seed-particles-containing solution to grow the above seed particles, the method comprising the step of obtaining the seed-particles-containing solution, in which particles are measured for a particle diameter continuously or at intervals of a constant time period and terminating the reaction at a time when an intended particle diameter is reached.
Ube Nitto Kasei Co., Ltd.
C C C C C C G
C01P C01B C01P C08G C08G C01P G02F
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Tatsuya Taro Junji
Nakano Suzuki Kawashima