A molding composition having improved impact strength

Details A molding composition having improved impact strength A molding composition having improved impact strength

C - Chemistry, Metallurgy

08

G

C08G 64/42 (2006.01) C08G 63/64 (2006.01) C08G 64/18 (2006.01) C08G 77/445 (2006.01) C08G 77/448 (2006.01) C08G 81/00 (2006.01)

Patent

CA 2246103

A thermoplastic molding composition having improved impact strength and a process for its preparation are disclosed. The structure of the resinous component of the composition contains carbonate structural units, polyester structural units and lactone-siloxane structural units conforming to (see fig. I) wherein m is 1 to 90, n is 5 to 300, R is an alkyl or a phenyl radical, p is 2 to 12 and q is 2 to 20. The preparation of the resinous component entails reactive blending in the presence of a transesterification catalyst of polycarbonate, (co)polyester and a lactone siloxane copolymer.

Divulgation d'une composition thermoplastique pour moulage possédant une résistance aux chocs améliorée, et d'un procédé pour sa préparation. Le composant résineux de la composition a une structure renfermant des motifs carbonate, des motifs polyester et des motifs lactone-siloxane conformes à (voir figure I), dans laquelle m est un nombre allant de 1 à 90, n est un nombre allant de 5 à 300, R est un radical alkyle ou phényle, p est un nombre allant de 2 à 12 et q est un nombre allant de 2 à 20. La préparation du composant résineux nécessite le mélange des réactifs en présence d'un catalyseur de transestérification de polycarbonate, de (co)polyester et de copolymère lactone-siloxane.

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