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. 24, 1987
Filed:
Sep. 27, 1985
Applicant:
Inventors:
Assignee:
Nissan Motor Co., Ltd., Yokohama City, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4284231 ; 4284111 ; 428447 ; 428448 ; 428451 ; 428500 ; 428502 ; 428524 ; 428690 ; 428913 ;
Abstract
Disclosed is an improved surface-hardening coating on a plastic body such as a plastic lens. The surface-hardening coating consists of a hard-coat layer of a polymer base composition and an underlying primer layer, which contains an ultraviolet absorber low in the bleeding tendency amounting to 0.5-50 wt % of the plastic component of the primer. A triazole having a vapor pressure not higher than 1.times.10.sup.-5 KPa at 100.degree. C. is preferred as the ultraviolet absorber. The introduction of such an ultraviolet absorber into the primer layer has the effect of greatly enhancing the durability and weatherability of the coating without sacrificing the surface hardness.