Process for producing a silicone oligomer solution and organopolysiloxane film formed from the solution

Abstract

A process for producing a solution of a silicone oligomer which comprises adding to an alkoxysilane, as a self-catalyst, a solution comprising a silicon compound which is soluble in hydrophilic solvents and has an average structural unit represented by R1nSiOx/2(OH)y(OR2)z, wherein R1 represents an alkyl group having 1 to 3 carbon atoms, vinyl group or phenyl group, a plurality of R1 may represent a same group or different groups, R2 represents an alkyl group having 1 to 3 carbon atoms, a plurality of R2 may represent a same group or different groups and n, x, y and z represent numbers satisfying relations: 0≦n<3, 0<x<4, y>0, z≧0 and y+z=4−n−x, and hydrolyzing and polycondensing the alkoxysilane; and a film of an organopolysiloxane formed from the solution of a silicone oligomer. In accordance with the process, a solution of a silicone oligomer which exhibits excellent storage stability in high concentrations and contains small or no amounts of acid or base components is produced by hydrolyzing and polycondensing an alkoxysilane and the film of an organopolysiloxane formed from the above solution has excellent physical properties.

Dependencies are inferred from the claim text.