Absorbent structures comprising coated super-absorbent polymer particles

US7311968B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Bruno Johannes Ehrnsperger · Bad Soden, DE
• Heike Opper · Bad Soden, DE
• Udo Friedel Schoenborn · Bad Soden, DE

Key dates

• Filing date: Jun 26, 2006
• Grant date: Dec 25, 2007
• Expiry date: Jun 26, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/699
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

This invention is directed to super-absorbent material, which comprises a super absorbent polymer core that is coated with an organic, polar coating agent, and whereby the particulate super-absorbent material has a contact angle and a corresponding cos CAm (as defined herein), whereby the cos CAm is more than 0.3, and whereby, when said coating agent is in the form of particles, said coating agent particles have a (weight) mean particle size of from 0.001 to 1 micron. The material is useful for absorbent structures and absorbent articles (comprising such structures). The coated super-absorbent material is typically present in said absorbent structure at least at a concentration of 50% by weight of the structure, preferably even 80% or even 90%. The invention also provides a process for making the absorbent material.