Patent ID: 7897714
Filing Date: 2011-03-01
Classification: C08G,C08J,Y10T

Abstract:
1. A method of preparing polyorganosilsesquioxane fine particles, comprising the steps of: (a) preparing a mixture comprising an organotrialkoxysilane and an organochlorosilane to give a concentration of the organochlorosilane in the mixture of about 100 to about 2,000 ppm; (b) mixing the mixture with water by means of a high-efficiency mixer selected from the group consisting of a homo-mixer, a homogenizer, a microfluidizer, a flat impeller having a width that is at least 50% of an inner diameter of a reactor, stirring equipment having a plurality of baffle plates oriented in a longitudinal direction of a reactor and combinations thereof to prepare a sol solution; and (c) maintaining a pH value of the sol solution within a range of about 8 to about 11.