Polycarbonate copolymer, and heat resistant parts comprising...

C - Chemistry – Metallurgy – 08 – G

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C08G 64/06 (2006.01) C08L 69/00 (2006.01) G02B 1/04 (2006.01) G02B 5/08 (2006.01) G11B 7/253 (2006.01)

Patent

CA 2481208

An object of the present invention is to provide a polycarbonate copolymer having excellent heat resistance and dimensional stability and heat resistant parts comprising the copolymer and suitable for use in various applications. The present invention is a polycarbonate copolymer comprising 5 to 95 mol% of recurring unit (component a) represented by the following general formula (I): (see formula I) and 95 to 5 mol% of recurring unit (component b) represented by the following general formula (II): (see formula II) (wherein R a to R d are each independently a hydrogen atom, a hydrocarbon group which may contain an aromatic group having 1 to 9 carbon atoms or a halogen atom, and W is a single bond, a hydrocarbon group which may contain an aromatic group having 1 to 20 carbon atoms or an O, S, SO, SO2, CO or COO group), and various heat resistant parts comprising the copolymer.

L'invention concerne un copolycarbonate possédant de très bonnes propriétés de résistance à la chaleur et de stabilité dimensionnelle. Elle concerne aussi des éléments résistants à la chaleur qui comprennent chacun le copolycarbonate et qui peuvent servir dans des applications variées. Le copolycarbonate comprend entre 5 et 95 moles % d'unités répétitives (ingrédient (a)) représentées par la formule générale suivante (I) : et entre 95 et moles % d'unités répétitives (ingrédient (b)) représentées par la formule générale suivante (II) : dans laquelle R?a¿ à R?d¿ représentent chacun, de manière indépendante, un atome d'hydrogène, un groupe hydrocarboné comportant éventuellement un groupe aromatique en C¿1-9?, ou un groupe halogéno et W représente une liaison simple, un groupe hydrocarboné comportant éventuellement un groupe aromatique en C¿1-20?, un atome d'oxygène, de soufre, un groupe SO, SO¿2?, CO ou COO.

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