Neutralized crosslinked polymers of acrylamidoalkylsulfonic acids and N-vinylamides

US6355752B1 · kind B1 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Peter Brungs · Altötting, DE
• Matthias Loffler · Niedernhausen, DE

Key dates

• Filing date: Feb 10, 2000
• Grant date: Mar 12, 2002
• Expiry date: Feb 10, 2020

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K47/32
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Water-soluble or water-swellable polymers, preferably having a particle size no greater than 10 &mgr;m, which, in addition to from 0.01 to 5% by weight of crosslinking structures originating from monomers having at least two olefinic double bonds, comprise, in random distribution, from 1 to 50% by weight of the repeat structural unit (1) and from 49.99 to 98.99% by weight of the repeat structural unit (2), in which R1, R2 and R3 independently of one another are a hydrogen atom or a methyl group, and Z is a C1-C4-alkylene group. These polymers are used as thickeners, preferably in cosmetic or pharmaceutical preparations.