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. 25, 1990
Filed:
Feb. 29, 1988
Applicant:
Inventors:
David Farrar, West Yorkshire, GB;
Peter Flesher, West Yorkshire, GB;
Malcolm Hawe, West Yorkshire, GB;
Assignee:
Allied Colloids Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ; A61F / ;
U.S. Cl.
CPC ...
526240 ; 526287 ; 5263031 ; 526307 ; 5263072 ; 5263073 ; 5263075 ; 5263076 ; 526310 ; 5263184 ; 52631841 ; 526332 ; 526320 ; 604372 ;
Abstract
The properties of absorptive synthetic polymer particles formed by polymerisation of water soluble monomers such as sodium acrylate or acrylamide with a cross linking agent are improved, especially as regards absorptive capacity for aqueous electrolytes, by copolymerising the monomers with an ethylenically unsaturated monomer that includes a pendant group --A.sub.m B.sub.n A.sub.p R where B is ethyleneoxy, n is at least 2, A is propyleneoxy or butyleneoxy, m and p are each less than n and are preferably zero, and R is a hydrophobic group.