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:
Nov. 15, 1988
Filed:
Jul. 27, 1987
Applicant:
Inventors:
Willy M Balaba, Monroeville, PA (US);
Gary J DiFranco, Plum Borough, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08L / ;
U.S. Cl.
CPC ...
525 61 ; 524430 ; 524437 ; 524557 ;
Abstract
A stable gel is formed by reacting alumina hydrate sol and a vinyl alcohol-vinyl acetate copolymer in an aqueous solution having pH less than about 7 to form a polymeric sol and then transforming the sol to a gel. The copolymer preferably comprises polyvinyl acetate that is about 85-99% hydrolyzed. The gel is drawn into a thin layer and water is removed to form a thin, substantially crack-free film. The film makes a stable, generally transparent insulating material.