Low-dusting pulverulent hydrophilic polymers

US5681878A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Helmut Klotzsche · Alzenau, DE
• Gustav Remmel · Gelnhausen, DE
• Ulrich Riegel · Landstuhl, DE
• Uwe Stuven · Bad Soden, DE

Key dates

• Filing date: Apr 19, 1995
• Grant date: Oct 28, 1997
• Expiry date: Apr 19, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2300/14
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present invention relates to pulverulent water-swellable hydrophilic (co)polymers which comprise, for reducing dusting, auxiliaries from the series consisting of silicones and/or other auxiliaries, the latter in a total amount of less than 1% by weight, for example polyglycols or polyglycol ethers, the vapor pressure of the individual auxiliaries being not more than 0.1 mbar at 20.degree. C. and their melting point being not more than 100.degree. C., processes for their preparation and their use for absorption of water and aqueous solutions.