Patent · US Expired

Fluid thickeners comprising neutralized crosslinked polymers of acrylamidoalkylsulonic acids and N-vinylamides

US6506833B2 · kind B2 · utility

3Cited by

6References

7Claims

0Family size

Assignee

Clariant Corporation · DE

Inventors

Peter Brungs · Altötting, DE
Mattias Löffler · Niedernhausen, DE

Key dates

Filing date	Dec 20, 2001
Grant date	Jan 14, 2003
Priority date	—
Expiry date	Dec 20, 2021

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K47/32
WIPO fieldPharmaceuticals
WIPO sectorChemistry

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.

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