Patent ID: 6875262
Filing Date: 2005-04-05
Classification: C08G,C09D,H01L,Y10T

Abstract:
1. A method for the preparation of a coating solution which comprises the steps of: (a) dissolving a polyalkoxy silane compound represented by the general formula in which R 1 is a hydrogen atom or a monovalent hydrocarbon group, R 2 is an alkyl group and the subscript n is 2, 3 or 4, in a first organic solvent, which is an alcohol solvent, to give a solution, in a concentration in the range from 1 to 5% by weight calculated as SiO 2 ; (b) admixing the solution with a basic compound and water to effect hydrolysis-of the polyalkoxy silane compound so as to give an organopolysiloxane as a hydrolysis-condensation product thereof; and (c) replacing the first organic solvent in the solution with a second organic solvent, which is an aprotic polar organic solvent, in such an amount that the concentration of the organopolysiloxane in the solution is in the range from 5 to 25% by weight calculated as SiO