United States Gypsum Company

Donald L Roelfs

Qingxia Liu

Michael Patrick Shake

Rafael Bury

Xuming Wang

Paul W Reed

David Paul Miller

Michael Lawrence Bolind

Dick C Engbrecht

Liu Qingxia

Paul Reed

Xuming Dept Of Metallurgical Engineering Wang

A fibrous mat-faced cementitious article comprising (a) a cementitious core, and (b) a first fibrous mat comprising polymer or mineral fibers and a hydrophobic finish on at least one surface thereof, wherein the hydrophobic finish is in contact with the cementitious core, and a method of preparing a fibrous mat-faced cementitious article, as well as a method of preparing a water-resistant cementitious article comprising (a) preparing an aqueous siloxane dispersion, wherein the dispersion comprises about 4 wt. % to about 8 wt. % siloxane, (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 cementitious article.

Water resistant cementitious article and method for preparing same

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West Burlington, IA, United States of America

Donald L Roelfs