Glass fiber-reinforced polycarbonate molding materials

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 9/08 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2696245

The invention relates to glass fiber-reinforced polycarbonate compositions and molding materials comprising A) from 10 to 85 parts by weight, preferably from 30 to 80 parts by weight, especially from 40 to 70 parts by weight, of polycarbonate, polyestercarbonate or a mixture thereof, B) from 10 to 50 parts by weight, preferably from 15 to 40 parts by weight, especially from 20 to 35 parts by weight, of rubber-free vinyl copolymer, C) from 5 to 50 parts by weight, preferably 7 to 35 parts by weight, especially from 8 to 25 parts by weight, of a sized glass fiber, the size comprising an epoxy polymer, D) from 0 to 2 parts by weight, preferably from 0 to I part by weight, of rubber-modified graft polymers, the composition more preferably being free of rubber-modified graft polymers, and E) from 0 to 10 parts by weight, preferably from 0.01 to 5 parts by weight, especially from 0.1 to 3 parts by weight, of conventional polymer additives, the composition being free of rubber-modified polymers other than component D, and the sum of components A+ B + C + D + E being normalized to 100 parts by weight, which are notable compared to the prior art for high stiffness, high flowability, high processing stability, good chemical resistance and good ageing stability with respect to influences of light and heat, and to the use of the compositions for producing shaped bodies, and to shaped bodies comprising the inventive compositions.

L'invention concerne des compositions et des matières moulables à base de polycarbonate chargé de fibres de verre, contenant A) de 10 à 85 parties en poids, de préférence de 30 à 80 parties en poids, en particulier de 40 à 70 parties en poids de polycarbonate, de polyester carbonate ou d'un mélange de ceux-ci, B) de 10 à 50 parties en poids, de préférence de 15 à 40 parties en poids, en particulier de 20 à 35 parties en poids de copolymère de vinyle exempt de caoutchouc, C) de 5 à 50 parties en poids, de préférence de 7 à 35 parties en poids, en particulier de 8 à 25 parties en poids de fibres de verre encollées dont l'encollage contient un polymère d'époxyde, D) de 0 à 2 parties en poids, de préférence de 0 à 1 partie en poids, en particulier 0 partie en poids de polymères greffés à modification caoutchoutique, et E) de 0 à 10 parties en poids, de préférence de 0,01 à 5 parties en poids, en particulier de 0,1 à 3 parties en poids d'additifs usuels pour polymères, la composition étant dénuée de polymères à modification caoutchoutique autres que le composant D et la somme des composants A + B + C + D + E étant rendue égale à 100 parties en poids. Par rapport à la technique antérieure, ces matières moulables et ces compositions se caractérisent par une grande rigidité, une fluidité élevée, une grande stabilité lors de la transformation, une bonne résistance aux produits chimiques et une bonne tenue au vieillissement dû à la lumière et aux influences thermiques. L'invention concerne également l'utilisation de ces compositions pour fabriquer des articles moulés, ainsi que des articles moulés contenant les compositions de l'invention.

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