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:
Jul. 17, 2007
Filed:
Nov. 13, 2003
Koki Ikeda, Chiyoda-ku, JP;
Toshimasa Tokuda, Chiyoda-ku, JP;
Hiroshi Shuto, Chiyoda-ku, JP;
Manabu Matsui, Chiyoda-ku, JP;
Toshiyuki Miyake, Chiyoda-ku, JP;
Kazushi Tando, Chiyoda-ku, JP;
Koki Ikeda, Chiyoda-ku, JP;
Toshimasa Tokuda, Chiyoda-ku, JP;
Hiroshi Shuto, Chiyoda-ku, JP;
Manabu Matsui, Chiyoda-ku, JP;
Toshiyuki Miyake, Chiyoda-ku, JP;
Kazushi Tando, Chiyoda-ku, JP;
Teijin Chemicals, Ltd., Tokyo, JP;
Abstract
There are provided a polycarbonate copolymer (A) which has excellent light resistance and heat resistance and comprises an aromatic dihydroxy component comprising 5 to 95 mol % of fluorene-skeleton-containing dihydroxy compound (1) having a specific structure and 95 to 5 mol % of ordinary bisphenol type dihydroxy compound (2), the content of fluorene-9-one in the copolymer being not higher than 15 ppm; and a polycarbonate composition comprising 0.01 to 5 parts by weight of ultraviolet absorber (B) based on 100 parts by weight of the copolymer (A), and the composition comprising the copolymer.