Water-soluble, crosslinked nitrogen-containing condensation products

US4224421A · kind A · utility

Assignee

• BASF SE

Inventors

• Werner Streit · Worms, DE
• Rolf Fikentscher · Ludwigshafen, DE
• Karl Gans · Ludwigshafen, DE
• Gerhard Welzel · Mannheim, DE
• Klaus Glaser · Mutterstadt, DE
• Emil Schaefer · Ludwigshafen, DE

Key dates

• Filing date: Jul 3, 1978
• Grant date: Sep 23, 1980
• Expiry date: Jul 3, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L71/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Water-soluble, crosslinked nitrogen-containing condensation products, the viscosity of which, in aqueous solution, increases with increasing temperature, are obtained by reacting a block copolymer of the formula: ##STR1## x is from 50 to 250, y is from 20 to 100, the ratio of x to y is from 6.5:1 to 1:15, with compounds having at least four basic NH groups in a weight ratio of from 0.8:1 to 30:1. The products are added to aqueous systems, e.g. polymer solutions and polymer dispersions, to improve the viscosity characteristics.