Patent · US Active

Hard water foaming agents and methods for gypsum board production

US9650305B2 · kind B2 · utility

1Cited by

33References

16Claims

0Family size

Assignee

UNITED STATES GYPSUM COMPANY · US

Inventors

Xuming Wang · Salt Lake City, US
Steven W. Sucech · Lake Villa, US

Key dates

Filing date	Dec 28, 2007
Grant date	May 16, 2017
Priority date	—
Expiry date	Oct 16, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24999
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Compositions and methods for reducing the impact of hard water on gypsum board foaming are provided. The compositions include adding a foam to water and a calcined slurry. The foam includes water, dispersed air and a surfactant. Surfactants for use include a hydrophobic portion having an alkyl chain length distribution of about 20% to about 60% C8 chains; about 20% to about 60% C10 chains; about 14% to about 36% C12 chains and about 2% to about 20% C14 chains and also having a hydrophilic portion having about 0.2 to 3.0 ethoxy groups.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.