Patent · US Active

Control of the thickening of silicate-containing aqueous systems

US8002119B2 · kind B2 · utility

0Cited by

7References

20Claims

0Family size

Assignee

BASF SE

Inventors

Karl-Heinz Buechner · Ottersheim, DE
Stephan Nied · Hamburg, DE
Alexander Goethlich · Mannheim, DE
Frank Klippel · Ludwigshafen, DE
Gunnar Schornick · Neuleiningen, DE

Key dates

Filing date	Jan 30, 2007
Grant date	Aug 23, 2011
Priority date	—
Expiry date	Aug 26, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A20/131
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for controlling the thickening of aqueous systems comprising silicates, which comprises adding to the aqueous system at least one copolymer of a mean molecular weight Mw of at least 3000 g/mol to at most 60 000 g/mol and the copolymer being made up essentially randomly from monoethylenically unsaturated monocarboxylic acids, monoethylenically unsaturated dicarboxylic acids and other ethylenically unsaturated comonomers, the polymerization for producing the copolymer being performed in the presence of from 0.01 to 100 mol % of at least one base, based on the total amount of all COOH groups of the monocarboxylic and dicarboxylic acids, the quantitative figures in % by weight being respectively based on the total amount of all monomers used.

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