Patent · US Active

Low molar, homogeneously substituted HEC for use in cement-based systems

US8430957B2 · kind B2 · utility

1Cited by

11References

8Claims

0Family size

Assignee

HERCULES LLC · US

Inventors

Wilfried Adolf Hohn · Lechenich, DE
Kirill N. Bakeev · Newark, US
John K. Bard · Wilmington, US
Michael Dittel · Düsseldorf, DE
Teng-Shau Young · Wilmington, US

Key dates

Filing date	May 31, 2012
Grant date	Apr 30, 2013
Priority date	—
Expiry date	May 31, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B24/383
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Hydroxyethylcellulose with a low molar substitution and which is uniformly substituted is useful in cement-based systems, including mortars. The cement-based system exhibits long pot life, as well as very high water retention capability at hot temperature, as well as better paste stability and optimized setting behavior for hot as well as cold temperature compared to typical, cement-based systems with commercial cellulose ether compounds. Less hydrophilic cellulose ethers such as methylhydroxyethylcellulose can be added as a second cellulose ether.

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