Rubber-reinforced vinyl aromatic polymers

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 51/04 (2006.01) C08F 2/00 (2006.01) C08F 257/02 (2006.01) C08F 279/02 (2006.01)

Patent

CA 2531748

Rubber-reinforced vinyl aromatic polymers having a strictly bimodal morphology, comprising from 55 to 90 % by weight of a rigid polymeric matrix and from 10 to 45 % by weight of a rubbery phase dispersed inside said rigid polymeric matrix, in the form of grafted and occluded particles and wherein said rubber particles consist of from 60 to 99 % by weight of particles with a capsule or ~core-shell~ morphology and from 1 to 40 % by weight of particles with a ~salami~ morphology, said percentages being measured on the basis of the weight of the rubber particles only.

L'invention concerne des polymères vinyle aromatiques renforcés par du caoutchouc à morphologie strictement bimodale, comprenant entre 55 et 90 % en poids d'une matrice polymère rigide et entre 10 et 45 % en poids d'une phase caoutchouteuse répartie à l'intérieur de la matrice polymère rigide, sous forme de particules greffées et occluses et dans lesquelles ces particules en caoutchouc consistent en 60 à 99 % en poids de particules à morphologie de capsule ou <= noyau-enveloppe >= et en 1 à 40 % en poids de particules à morphologie <= salami >=, ces pourcentages étant mesurés sur la base du poids des particules de caoutchouc uniquement.

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