Patent ID: 8142856
Filing Date: 2012-03-27
Classification: C04B,C08G,Y02W

Abstract:
1. A method of preparing a hydrophobic and/or water resistant mineral and/or filler material, said method comprising: (i) preparing a hydrolyzate containing polysiloxanes by hydrolyzing a hydrolysable silane or hydrolysable silane mixture in the presence of an acid hydrolysis catalyst and water immediately prior to (ii) combining the polysiloxane hydrolyzate with at least one mineral and/or filler and optionally with additional water and/or a catalyst for condensation of the hydrolysate, thereby preparing the hydrophobic and/or water resistant material, wherein the hydrolysable silane or hydrolysable silane mixture is present in the water in a concentration of 10 to 50 percent by weight.