The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2009
Filed:
Apr. 23, 2003
Jörg Harren, Krefeld, DE;
Jörg Issberner, Willich-Neersen, DE;
Harald Schmidt, Tonisvorst, DE;
Stockhausen GmbH, Krefeld, DE;
Abstract
Water-absorbing, antimicrobial polymer particles comprising from about 1 to about 500 ppm, based on the particles, of a silver ion based on a silver salt, wherein the silver salt has a solubility product of at least about 1×10(mol/l); at least about 10 wt. %, based on the polymer particle, of a water-absorbing polymer based on: (α1) from about 50 to about 99.99 wt. % polymerized, ethylenically unsaturated, acid groups-containing monomers or salts thereof, (α2) 0 to about 40 wt. % polymerized, mono-ethylenically unsaturated monomers polymerizable with α1, (α3) from about 0.01 to about 5 wt. %, preferably from about 0.1 to about 3 wt. % of one or more crosslinkers, (α4) 0 to about 30 wt. % of a water soluble polymer and (α5) 0 to about 20 wt. % of auxiliaries, the concentration of the silver ion based on a silver salt in at most about 90 vol. % of the particles is less than about 0.01 ppm.