Patent ID: 8062754
Filing Date: 2011-11-22
Classification: B27K,C04B,C08K,C08L,Y10T

Abstract:
1. A process for hydrophobizing and improving the beading effect of a porous construction material comprising applying a liquid silicone composition to a porous construction material, such that the liquid silicone composition is introduced into the porous construction material, wherein the liquid silicone composition consists of: a) at least one polyorganosiloxane resin A exhibiting, per molecule, on the one hand, at least two different siloxyl units chosen from those of M, D, T and Q type, one of the units being a T unit or a Q unit, and, on the other hand, at least three hydrolyzable/condensable groups of OH and/or OR b) at least one metal alkoxide B in a content ≧5% by weight with respect to the polyorganosiloxane resin A, said metal alkoxide having the general formula: c) at least one crosslinking agent C, in a content ≧4% by weight with respect to the polyorganosiloxane resin A, said crosslinking agent C having the formula d) an organic solvent which can be used for the hydrophobizing of construction material.