Monovinylidene aromatic polymers based on highly linear high...

C - Chemistry – Metallurgy – 08 – F

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C08F 279/02 (2006.01) C08F 279/04 (2006.01) C08F 285/00 (2006.01) C08L 25/06 (2006.01) C08L 51/00 (2006.01) C08L 51/04 (2006.01) C08L 55/02 (2006.01)

Patent

CA 2456136

Disclosed are rubber-modified monovinylidene aromatic polymers with improved toughness and rigidity as well as a process for the preparation thereof. The polymer comprises a) a monovinylidene aromatic polymer matrix; and b) rubber particles dispersed therein, characterized in that the rubber particles are produced from a diene rubber having substantially linear structure containing less than one long chain branch per 10,000 carbon atoms in the polymer backbone with a solution viscosity of 5 cPoise to 1000 cPoise and a Mooney Viscosity of 5 to 120.

L'invention concerne des polymères aromatiques monovinylidène modifiés au caoutchouc à résistance et rigidité améliorées ainsi qu'un procédé de préparation de ces derniers. Ledit polymère comprend : a) une matrice polymère aromatique monovinylidène ; et b) des particules de caoutchouc dispersées à l'intérieur dudit polymère, caractérisées en ce que lesdites particules de caoutchouc sont produites à partir d'un caoutchouc diénique à structure sensiblement linéaire contenant moins d'une ramification de chaîne longue pour 10000 atomes de carbone dans le squelette du polymère, avec une viscosité de solution de 5 cPoise à 1000 cPoise et une consistance Mooney comprise entre 5 et 120.

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