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:
Apr. 25, 1995
Filed:
Feb. 22, 1994
Applicant:
Inventor:
Gautam A Patel, Clifton Park, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428412 ; 427379 ; 427387 ; 4273935 ; 4274121 ; 428451 ; 428520 ; 428522 ; 4289088 ;
Abstract
Improved adhesion of abrasion-resistant top coats such as silicone hardcoats to thermoplastic (preferably polycarbonate) surfaces is obtained by employing as a primer a mixture of poly(methyl methacrylate) with a copolymer of methyl methacrylate and at least one other alkyl acrylate, said copolymer having a glass transition temperature up to about 75.degree. C. The improvement in adhesion is particularly noticeable for dip-coated and flow-coated substrates having top coats of variable thickness.