Impact-resistant moulding materials and moulded bodies

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 33/12 (2006.01) C08F 283/12 (2006.01) C08F 290/14 (2006.01) C08L 33/06 (2006.01) C08L 51/04 (2006.01) C08L 51/08 (2006.01) C08L 55/02 (2006.01) C08L 33/20 (2006.01) C08L 35/06 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2474774

The invention relates to impact-resistant moulding materials comprising poly(meth)acrylate and at least one silicon rubber graft polymer comprising between 0.05 and 95 wt. %, in relation to the total weight of the copolymer, of a core a) consisting of an organosilicon polymer of general formula (R2SiO2/2)x (RSiO3/2)Y (SiO4/2)x wherein x = between 0 and 99.5 mole %, y = between 0.5 and 100 mole %, z = between 0 and 50 mole %, and R represents alkyl or alkenyl radicals comprising between 1 and 6 C atoms and being the same or different, aryl radicals or substituted hydrocarbon radicals; between 0 and 94. 5 wt. %, in relation to the total weight of the copolymer, of a polydialkylsiloxane layer b); between 5 and 95 wt. %, in relation to the total weight of the copolymer, of an envelope c) consisting of organic polymers. The invention is characterised in that the core a) comprises vinyl groups, and the envelope c) can be obtained by radical polymerisation of a mixture containing acrylic acid esters and methacrylates.

L'invention concerne des matière à mouler résistant aux chocs, contenant du poly(méth)acrylate et au moins un copolymère greffé de caoutchouc silicone qui comprend : 0,05 à 95 % en poids, par rapport au poids total du copolymère, d'un noyau a) constitué d'un polymère organosilicié de formule générale (R¿2?SiO¿2/2?)¿x? (RSiO¿3/2?)¿y? (SiO¿4/2?)¿z?, dans laquelle x = 0 à 99,5 % en moles, y = 0,5 à 100 % en moles, z = 0 à 50 % en moles, les groupes R représentent des groupes alkyle ou alcényle identiques ou différents comportant 1 à 6 atomes de C, des groupes aryles ou des groupes d'hydrocarbures substitués ; 0 à 94,5 % en poids, par rapport au poids total du copolymère, d'une couche de polydialkylsiloxane b) ; et 5 à 95 % en poids, par rapport au poids total du copolymère, d'une enveloppe c) constituée de polymères organiques. L'invention est caractérisée en ce que le noyau a) comprend des groupes vinyliques et en ce que l'enveloppe c) s'obtient par polymérisation radicalaire d'un mélange contenant des esters acryliques et des méthacrylates.

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