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:
Jun. 15, 1993
Filed:
Jan. 17, 1992
Applicant:
Inventors:
Klaus Heidel, Marl, DE;
Frank Zimmermann, Recklinghausen, DE;
Assignee:
Starchem GmbH, Krefeld, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; A61L / ;
U.S. Cl.
CPC ...
527314 ; 527311 ; 527312 ; 527313 ; 527315 ;
Abstract
Fine-particle, water-swellable polysaccharide graft copolymers by prepared inverse suspension polymerization of 5 to 40 parts of polysaccharide and 95 to 60 parts of an olefinically unsaturated carboxylic acid, in which an aqueous phase which contains the olefinically unsaturated carboxylic acid, polymerization initiator and 100 to 75 wt. % of the polysaccharide is metered into a hydrophobic solvent which contains 0 to 25 wt. % of the polysaccharide at 40.degree. to 100.degree. C., exhibit improved absorptivity properties and particle size distribution.