Thermoplastic composition having low gloss

Details Thermoplastic composition having low gloss Thermoplastic composition having low gloss

C - Chemistry, Metallurgy

08

L

C08L 69/00 (2006.01) C08K 3/34 (2006.01) C08L 51/00 (2006.01)

Patent

CA 2695565

A thermoplastic molding composition characterized in that its 60° gloss is lower than 40 is disclosed. The composition contains 10 to 94.5 pbw aromatic (co)polycarbonate, 4 to 40 pbw rubber graft (co)polymer > containing EP(D)M or (co)polyacrylate as graft base and a grafted phase compatible with said aromatic (co)polycarbonate, and 0.05 to 10 pbw siloxane (co)polymer. The siloxane (co)polymer contains siloxane structural units that contain epoxy functionalities (SG) and optionally siloxane units that contain no epoxy functionalities (SNG) at a ratio of (SG) units to the total (SG)+(SNG) units greater than 0.05.

La présente invention concerne une composition de moulage thermoplastique caractérisée en ce que sa brillance à 60° est inférieure à 40. La composition contient de 10 à 94,5 % en poids d'un (co)polycarbonate aromatique, de 4 à 40 % en poids de (co)polymère caoutchouc greffé > contenant de l'EP(D)M ou du (co)polyacrylate comme base de greffe et une phase greffée compatible avec ledit (co)polycarbonate aromatique, et de 0,05 à 10 % en poids de (co)polymère siloxane. Le (co)polymère siloxane contient des unités structurelles siloxane qui contiennent des fonctionnalités époxy (SG) et éventuellement des unités siloxane qui ne contiennent pas de fonctionnalités époxy (SNG) à un rapport d'unités (SG) sur le total des unités (SG)+(SNG) supérieur à 0,05.

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