Patent ID: 6476174
Filing Date: 2002-11-05
Classification: C08G

Abstract:
A process for preparing a silica-based inorganic-organic hybrid resin, comprising the following steps:(a) hydrolyzing a silane compound having a formula of R1nSi(OR2)4âˆ’n wherein n is an integer of 0, 1, 2 or 3, R1 is a terminal group selected from the group consisting of alkyl, epoxy, alkenyl, amino, carboxyl, and hydroxy, as well as an alkyl having the above-mentioned terminal group, R2 is an C1-C4 alkyl in the presence of phenol or phenolic resin; (b) condensing said hydrolyzed silane to obtain a silica cluster; (c) reacting said silica cluster with a siloxane to obtain a modified silica cluster; and (d) reacting said modified silica cluster with a thermosetting resin having at least one hydroxy group in its structure to obtain the silica-based inorganic-organic hybrid resin.