Weatherable resinous composition with improved heat resistance

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 51/04 (2006.01) C08F 265/04 (2006.01) C08L 55/02 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2581937

Disclosed are compositions comprising: (i) a rubber modified thermoplastic resin comprising a discontinuous elastomeric phase dispersed in a rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is grafted to the elastomeric phase, and wherein the elastomeric phase comprises a polymer having structural units derived from at least one (C1- C12)alkyl(meth)acrylate monomer; (ii) a second polymer consisting essentially of structural units derived from at least one (C1-C12)alkyl(meth)acrylate monomer; and optionally (iii) a third polymer comprising structural units derived from at least one alkenyl aromatic monomer and at least one monoethylenically unsaturated nitrile monomer prepared in a separate polymerization step and added to the composition. In other embodiments the present invention comprises articles made from said compositions.

L'invention concerne des compositions comprenant: (i) une résine thermoplastique modifiée au caoutchouc comprenant une phase élastomère discontinue dispersée dans une phase thermoplastique rigide, au moins une partie de la phase thermoplastique rigide étant greffée à la phase élastomère, cette dernière comprenant un polymère possédant des unités de construction dérivées d'au moins un monomère (méth)acrylate d'alkyle (C1-C12); (ii) un deuxième polymère constitué essentiellement d'unités de construction dérivées d'au moins un monomère (méth)acrylate d'alkyle (C1-C12); et éventuellement (iii) un troisième polymère comprenant des unités de construction dérivées d'au moins un monomère alcényle aromatique et d'au moins un monomère de nitrile non saturé monoéthyléniquement préparé dans une étape de polymérisation séparée et ajouté à la composition. Dans d'autres modes de réalisation, l'invention concerne des articles à base de ces compositions.

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