Patent ID: 9233986
Filing Date: 2016-01-12
CPC Classification: C04B,C07F,C09C,Y02W,Y10T

Claim Text:
1. A process for hydrophobizing a molding, the method comprising: perforating a microporous thermal insulation molding comprising hydrophilic silica, to obtain a perforated, microporous molding; and treating the perforated, microporous molding with at least one organosilane in a chamber, thereby obtaining a hydrophobized molding, wherein: the at least one organosilane is gaseous under said treating and is introduced into the chamber until a pressure difference Δp is ≧20 mbar, wherein Δp=p2−p1, where p1=pressure in the chamber before introduction of the organosilane, p2=pressure in the chamber at which the introduction of the organosilane is stopped.