Amorphous polyester resin composition

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 67/00 (2006.01) C08L 67/02 (2006.01) C08L 51/04 (2006.01) C08L 55/02 (2006.01)

Patent

CA 2503295

A substantially amorphous polyester resin composition which comprises 1 to 40 parts by weight of a core-shell impact resistance improving agent having, as a core, a bilayer aromatic vinyl-butadiene based copolymer having a refractive index of 1.55 to 1.60 and containing an innermost layer having a high content in weight of a monomer of cross-linking property, and 60 to 99 parts by weight of at least one aromatic polyester or co-polyester. The polyester resin composition exhibits high transparency and high impact resistance and is improved in the whitening at a low stress.

Cette invention se rapporte à une composition de résine de polyester essentiellement amorphe, qui comprend 1 à 40 parties en poids d'un agent améliorant la résistance aux chocs noyau-enveloppe, comportant, comme noyau, un copolymère bicouche à base de butadiène de vinyle aromatique ayant un indice de réfraction compris entre 1,55 et 1,60 et contenant une couche interne ayant une teneur élevée en poids en un monomère au pouvoir de réticulation, et 60 à 99 parties en poids d'au moins un polyester ou copolyester aromatique. Cette composition de résine de polyester possède une transparence élevée et une forte résistance aux chocs, ainsi qu'une propriété améliorée de blanchiment sous faible contrainte.

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