The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2011
Filed:
Jan. 30, 2007
Karl-heinz Buechner, Altlussheim, DE;
Stephan Nied, Neustadt / Wstr., DE;
Alexander Goethlich, Mannheim, DE;
Frank Klippel, Ludwigshafen, DE;
Gunnar Schornick, Neuleiningen, DE;
Karl-Heinz Buechner, Altlussheim, DE;
Stephan Nied, Neustadt / Wstr., DE;
Alexander Goethlich, Mannheim, DE;
Frank Klippel, Ludwigshafen, DE;
Gunnar Schornick, Neuleiningen, DE;
BASF SE, Ludwigshafen, DE;
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.