| abstract |
PROBLEM TO BE SOLVED: To provide a method for preparing a transparent thermosetting organosiloxane resin paint imparting wear resistance and hot water resistance, and a polycarbonate resin molded body whose surface is protected by the paint. In preparing an organosiloxane resin coating material obtained by condensation reaction of colloidal silica and an alkoxysilane hydrolyzate represented by the following formula (1), the average particle size of silica fine particles is 10 to 70 nm, and The preparation method characterized by making it react so that the variation coefficient based on the particle diameter may be 20 to 40%. (However, in the formula, each of R 1 and R 2 is one or more selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, a vinyl group, or a methacryloxy group, an amino group, a glycidoxy group, and a 3,4-epoxycyclohexyl group. An alkyl group having 1 to 3 carbon atoms substituted with a group, R 3 is an alkyl group having 1 to 4 carbon atoms, m and n are integers of 0, 1 and 2, respectively, and m + n is 0, 1 and 2. Any integer) [Selection figure] None |