Patent · US Active

Coated water-swellable material comprising hydrogel forming polymers

US7794839B2 · kind B2 · utility

29Cited by

106References

16Claims

0Family size

Assignee

The Procter & Gamble Company · US

Inventors

Mattias Schmidt · Idstein, DE
Axel Meyer · Frankfurt am Main, DE
Bruno Johannes Ehrnsperger · Bad Soden, DE
Stephen Allen Goldman · Wyoming, US
Edward Joseph Urankar · Maineville, US

Key dates

Filing date	Mar 17, 2009
Grant date	Sep 14, 2010
Priority date	—
Expiry date	Mar 17, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31551
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

This invention is directed to coated water-swellable materials, typically solid, particulate, water-swellable materials, i.e. materials that comprise hydrogel-forming polymers, whereof at least a part is coated with a coating, which substantially does not break when the polymers swell, as set out in the method herein. Said coating is present at a level of at least 1% by weight of the water-swellable material.The coating comprises preferably an elastomeric polymeric material. The invention also relates products, e.g., disposable absorbent articles, comprising such coated water-swellable material.

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