United States Gypsum Company

International Paper Company

Usg Interiors, Inc.

Yufeng Xu

Dennis W Anderson

Stephen A Buzza

Christopher Michael Wilson

Bruce Richard McGaffin

David R Blackburn

Wenqi Luan

Eugene Scott Stivender

D W Anderson

Renee J Weinberger

Bruce Richard Mcgaffin

Bruce Richard Mcgaffinn

An improved water-resistant gypsum product prepared with a high-viscosity siloxane is provided. A fuel-efficient method for making the product and reducing the amount of siloxane dust released is provided as well.

Siloxane compositions and methods for reducing VOC and siloxane dust

The disclosure provides a method of forming an acoustical panel base mat, including providing a green board including an alkyl ether sulfate surfactant, wherein the green board includes from about 10 to about 40 wt. % solids, and dewatering the green board slurry to form a dewatered green board, wherein the dewatering comprises supplying hot air and applying a vacuum to the green board.

Method for dewatering acoustical panels

The present disclosure relates to no fiber calcined gypsum and methods of making the same using a multi-stage (typically two-stage) calcination process. The first stage is a high temperature calcination and nucleation stage. The second stage is a lower temperature calcination and crystal growth stage which produces product slurry containing calcined gypsum particles having large, acicular calcined gypsum crystal morphology for use in making gypsum fiberboard.

No fiber calcination of gypsum for gypsum fiberboard

A roof cover board made from a mixture of 30-60% stucco; 20-50% perlite; 10-30% cellulose fiber; 3-20% starch; and siloxane. Also disclosed is a stucco-free roof cover board made from a mixture of 30-60% perlite, 30-60% cellulose fiber, 5-25% starch; and siloxane. Also disclosed are methods for making same.

Light weight gypsum fiber panel suitable for use as roof cover board

A water-resistant gypsum fiber product comprising siloxane and coated with a coating comprising alkali metal organosiliconate is provided. A method of making a gypsum fiber product in which siloxane is cross-linked at the surface of the product is also provided. A fuel-efficient method for making the product and reducing the amount of siloxane dust released is provided as well.

Compositions and methods for water-resistant gypsum fiber products

This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.

Paper substrates useful in wallboard tape applications

Repulped fiber that has been treated with an aqueous solution of a caustic selected from sodium hydroxide, potassium hydroxide and sodium carbonate, is used to make wallboard paper that is used to make a gypsum wallboard having improved nail pulling strength compared to gypsum wallboard made with fiber wallboard paper that has not been treated with caustic.

Growing community of inventors

Gurnee, IL, United States of America

Yufeng Xu