Room temperature vulcanizable, foamable polysiloxane composition

摘要

A room temperature vulcanizable, foamable polysiloxane composition is described, which comprises: (A) a specific type of alpha , omega -dihydroxyorganopolysiloxane which has a surface tension of not lower than 22 dynes/cm at 25 DEG C.; (B) a specific type of organopolyhydroxypolysiloxane; (C) a polyorganohydrogensiloxane which has at least two units of the following general formula in one molecule R5aHbSiO(4-(a+b))/2 wherein R5 represents a monovalent hydrocarbon group except for aliphatic unsaturated hydrocarbon group, a is an integer of 0 to 2, and b is an integer of from 0 to 3 provided that the total of a+b is an integer of from 1 to 3; (D) an unsubstituted or substituted alcohol having from 1 to 12 carbon atoms; and (E) a platinum catalyst. The composition has a high degree of foaming and the foamed product obtained from the composition has good foaming stability and good tensile strength.