Patent ID: 8070895
Filing Date: 2011-12-06
Classification: B32B,C04B,E04C,Y02W,Y10T

Abstract:
1. A method of preparing a water-resistant cementitious article comprising (a) preparing an aqueous siloxane dispersion comprising from about 4 wt. % to about 8 wt. % siloxane in water, wherein the aqueous siloxane dispersion comprises dispersed siloxane particles having an average particle size of less than about 50 microns, and does not comprise an emulsifier or dispersant; (b) combining the siloxane dispersion with a cementitious mixture to provide a cementitious slurry, (c) depositing the cementitious slurry onto a substrate, and (d) allowing the cementitious slurry to harden, thereby providing a water-resistant cementitious article.