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:
Feb. 16, 1993
Filed:
Jul. 24, 1991
Applicant:
Inventors:
Robert Degeilh, Le Port Marly, FR;
Daniel Dages, Les Mureaux, FR;
Assignee:
Saint-Gobain Vitrage, Courbevoie, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524297 ; 524299 ; 524742 ; 524747 ; 525 61 ;
Abstract
Process for the production of a plasticized polyvinyl butyral particularly used for gluing a base onto glazings. The polyvinyl butyral is obtained by the reaction of a butyric aldehyde with a polyvinyl alcohol, demonstrating a level of hydrolysis greater than 95%, and a viscosity greater than 50 cP, in the presence of an acid catalyst and an emulsifier, the quantity of butyric aldehyde being such that the level of hydroxylation of the polyvinyl butyral obtained is between 22 and 26%.