Polycarbonate copolymer, resin composition, and molded article

Details Polycarbonate copolymer, resin composition, and molded article Polycarbonate copolymer, resin composition, and molded article

C - Chemistry, Metallurgy

08

G

C08G 64/06 (2006.01) C08K 5/3437 (2006.01) C08K 5/357 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2505969

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, (see formula 1)

L'invention concerne un copolymère de polycarbonate (A) issu de monomères comprenant un élément dihydroxy aromatique qui renferme, en pourcentage molaire par rapport à l'ensemble de cet élément, entre 5 et 95 % de composé dihydroxy (a) de structure spécifique contenant un squelette fluorène, et entre 95 et 5 % de composé dihydroxy ordinaire (2) du type bisphénol. Le copolymère (A) a une teneur en fluorène-9-one inférieure ou égale à 15 ppm. L'invention concerne également une composition de polycarbonate comprenant, en poids, 100 parties de copolymère (A) et entre 0,01 et 5 parties d'absorbant d'UV (B). Le copolymère et la composition offrent une excellente résistance à la lumière et à la chaleur.

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