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. 05, 1992
Filed:
Oct. 19, 1990
Applicant:
Inventors:
Peter Flesher, Bingley, West Yorkshire, GB;
David Farrar, Idle, Bradford, West Yorkshire, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524503 ; 524557 ; 525 57 ; 525 60 ;
Abstract
Novel polyvinyl alcohols include, in the polymeric backbone, vinyl units containing pendant hydrophobic groups. The polymers are made by hydrolysis of corresponding polyvinyl acylates under conditions are avoid hydrolysis of the pendant hydrophobic groups from the polymer. These groups are preferably bonded into the polymer as allyl ether units. The hydrophobic units act as internal plasticizers in films or other shaped articles formed from the polymers and, in particular, gives significant benefit in viscosity and other rheology characteristics of aqueous compositions formed from the polymer.