Polyolefin graft copolymer/polyamide blend

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 51/06 (2006.01) C08F 255/00 (2006.01) C08L 77/00 (2006.01) C08L 77/02 (2006.01) C08L 77/06 (2006.01)

Patent

CA 2320888

A polymer blend contains: 1) about 1 % to about 98 % of a graft copolymer comprising a backbone of a propylene polymer material having graft polymerized thereto monomers selected from a) at least one vinyl aromatic compound and an unsaturated carboxylic acid and b) at least one vinyl aromatic compound and an anhydride of an unsaturated acid or its acid form, wherein the polymerized monomers are present in an amount of about 10 to about 95 parts per hundred parts of the propylene polymer material, and 2) about 99 % to about 2 % of at least one polyamide resin. The composition optionally also contains about 2 % to about 30 % of one or more rubber components, about 5 % to about 90 % of a broad molecular weight distribution propylene polymer material, or both.

L'invention porte sur un mélange de polymères comprenant: (1) d'environ 1 % à environ 98 % d'un copolymère greffé à squelette de polymère de propylène auquel sont greffés par polymérisation des monomères choisis parmi (a) au moins un composé vinylique aromatique et un acide carboxylique insaturé, et (b) au moins un composé vinylique aromatique et un anhydride d'un acide insaturé ou sa forme acide, les monomères polymérisés étant présents à raison d'environ 10 à environ 95 parties pour cents du susdit polymère de propylène; et (2) d'environ 99 % à environ 2 % d'au moins une résine de polyamide. La composition peut en outre contenir facultativement d'environ 2 % à environ 30 % de composants de caoutchouc, d'environ 5 % à environ 90 % d'un polymère de propylène à distribution étendue du poids moléculaire, ou les deux.

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