Patent · US Expired

Polymer mixture of hydrogels with different pH value

US7144957B2 · kind B2 · utility

13Cited by

2References

11Claims

0Family size

Assignee

BASF SE

Inventors

Rüdiger Funk · Niedernhausen, DE
Norbert Herfert · Charlotte, US
Mariola Wanior · Niederrodenbach, DE

Key dates

Filing date	Sep 26, 2002
Grant date	Dec 5, 2006
Priority date	—
Expiry date	Jul 19, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S524/916
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The present invention relates to polymer mixtures comprising hydrogel forming polymers capable of absorbing aqueous fluids, having different pH values and each being preparable by polymerization of olefinically unsaturated carboxylic acids or derivatives thereof, their preparation, use and hygiene articles containing same. More particularly, the invention relates to 2-component polymer mixtures comprising polymers having a pH range from acidic to neutral.

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