Moldable thermosetting composition

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 67/06 (2006.01) C08F 290/06 (2006.01) C08L 63/10 (2006.01)

Patent

CA 2477156

The invention concerns a thermosetting moulding composition comprising: a polyester or vinyl ester epoxy resin (A) in solution in an ethylenically unsaturated liquid monomer (B); at least an anti-shrink additive (C); an organic peroxide catalyst; and a mineral filler. Said composition is characterized in that the ethylenically unsaturated liquid monomer (B) is a vinyltoluene and/or a t-butyl styrene; and the anti-shrink additive(s) is/are free of acid functionality and is/are selected among methyl methacrylate copolymers and a comonomer which is a vinyl and/or a methyl acrylate and/or ethyl acrylate monomer, in solution in the ethylenically unsaturated monomer (B). Such a composition is designed, in particular, for the automotive industry.

L'invention concerne une composition thermodurcissable moulable comprenant: une résine polyester ou époxy vinylester (A) en solution dans un monomère liquide à insaturation éthylénique (B); au moins un additif anti-retrait (C); un catalyseur peroxyde organique; et une charge minérale; et se caractérisant en ce que: le monomère liquide à insaturation éthylénique (B) est un vinyltoluène et/ou un t-butyl styrène; et le ou les additif(s) anti-retrait (C) est/sont dépourvu(s) de fonctionnalité acide et est/sont choisi(s) parmi les copolymères de méthacrylate de méthyle et d'un comonomère qui est un monomère vinylique et/ou de l'acrylate de méthyle et/ou de l'acrylate d'éthyle, en solution dans le monomère à insaturation éthylénique (B). Une telle composition est destinée, en particulier, à l'industrie automobile.

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