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:
May. 16, 1995
Filed:
Oct. 12, 1993
Applicant:
Inventor:
Thomas C Johnson, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
525 59 ; 525244 ; 525301 ;
Abstract
The subject invention pertains to a water-swellable polymer comprising the polymerization product of an .alpha.,.beta.-ethylenically unsaturated monomer in an aqueous phase, initiator, crosslinking agent, and polyvinyl alcohol, the polymerization product having been heated at a temperature greater than about 160.degree. C., wherein the polyvinyl alcohol is less than about 98 percent hydrolyzed, such that the polymerization product has improved whiteness.