Method and compositions for toughening polyester resins

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 67/00 (2006.01) C08J 3/20 (2006.01) C08L 23/08 (2006.01) C08L 33/04 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2218856

An acrylic modifier composition for improving impact resistance of polyester compositions is provided which comprises (a) between about 10% to about 90% by weight of a first component selected from the group consisting of an ethylene alkyl acrylate co-polymer and ethylene alkyl methacrylate copolymer, wherein the alkyl is C1 to C10; and (b) between about 10% to about 90% by weight of a second component selected from the terpolymer group consisting of ethylene/alkylacrylate/ glycidyl methacrylate; ethylene/alkyl acrylatet/glycidyl acrylate; ethylene/alkyl methacrylate/glycidyl acrylate; and ethylene/alkyl methacrylate/glycidyl methacrylate, wherein the alkyl is C1 to C10. Polyester compositions toughened by addition of the modifier composition are disclosed, as are articles molded from these compositions and processes for forming these polyester compositions.

On présente une composition de modificateur en acrylique pour améliorer la résistance au choc des compositions de polyester comprenant a) d'environ 10 % à environ 90 % en poids d'un premier constituant choisi parmi le groupe constitué d'un copolymère d'éthylène et d'acrylate d'alkyle et d'un copolymère d'éthylène et de méthacrylate d'alkyle, où l'alkyle possède de 1 à 10 atomes de carbone; et b) d'environ 10 % à environ 90 % en poids d'un second constituant choisi parmi le groupe constitué des terpolymères suivants : éthylène-acrylate d'alkyle-méthacrylate glycidyle; éthylène-acrylate d'alkyle-acrylate de glycidyle; éthylène-méthacrylate d'alkyle-acrylate de glycidyle; et éthylène-méthacrylate d'alkyle-méthacrylate de glycidyle, où l'alkyle possède de 1 à 10 atomes de carbone. Des compositions de polyester rendues plus résistantes au choc par l'addition de la composition de modificateur sont dévoilées, comme le sont des objets moulés à partir de ces compositions et des procédés pour former ces compositions de polyester.

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