Patent ID: 7601792
Filing Date: 2009-10-13
Classification: C08G,C08J,C09D,Y10T

Abstract:
1. A method of preparing a silicone resin comprising adding 50 parts to less than 100 parts by weight of water at pH 1 to 7 to 100 parts by weight of a mixture of components (A), (B) and (C) for effecting cohydrolytic condensation to form a silicone resin and an alcohol by-product, and distilling off the alcohol until the liquid temperature reaches 95° C., said mixture consisting of (A) a tetraalkoxysilane having the general formula: Si(OR′) thereby obtaining a silicone resin having a number average molecular weight of 2,390 to 40,000 as measured by gel permeation chromatography (GPC), and containing units of the formula: R