Patent · US Active

Copolymer based on a sulfonic acid-containing compound

US8148304B2 · kind B2 · utility

11Cited by

8References

21Claims

0Family size

Assignee

BASF SE

Inventors

Christian Spindler · Günzburg, DE
Andrea Assmann · Unterreit, DE
Uwe Huber · Garching bei München, DE

Key dates

Filing date	Nov 24, 2008
Grant date	Apr 3, 2012
Priority date	—
Expiry date	Jan 11, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S507/904
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A copolymer containing, as monomer components, a) at least one sulfonic acid-containing compound, b) at least one nitrogen-containing N-vinylamide, one acrylamide or methacrylamide and c) at least one bifunctional or higher-functional vinyl ether is proposed. These copolymers are suitable in particular as thixotropic agents, antisegregation agents and water retention agents and overall as an additive in cement-containing but also gypsum-based systems. Such copolymers having a molecular weight of >40 000 g/mol can be used in particular as admixtures in the exploration of mineral oil and natural gas deposits.

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