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:
Jan. 04, 2011
Filed:
Dec. 04, 2007
Seiichi Tanabe, Chiyoda-ku, JP;
Moritoshi Matsumoto, Chiyoda-ku, JP;
Jiro Ariki, Chiyoda-ku, JP;
Teijin Chemicals, Ltd., Tokyo, JP;
Abstract
A resin composition which contains polycarbonate resin, does not transmit a wavelength of 385 nm substantially and has a high total light transmittance and excellent heat resistance. The resin composition comprises (1) polycarbonate resin, (2) an ultraviolet absorber (A) such as 2-(2H-benzotriazol-2-yl)-p-cresol, (3) an ultraviolet absorber (B) such as 2,2'-methylenebis[4-(1,1,3,3-tetramethylbutyl)-6-(2H-benzotriazol-2-yl)phenol] and (4) at least one compound (C) represented by the following formula (I) or (II) and is used for spectacle lenses.(R—S—CH—CH—C(O)O—CH—)C  (I)(R—O—C(O)—CH—CH—)S  (II)(wherein Ris an alkyl group having 4 to 20 carbon atoms, and Ris an alkyl group having 6 to 22 carbon atoms.)