Impact-resistant polyolefin compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/10 (2006.01) C08F 297/08 (2006.01) C08F 210/06 (2006.01) C08L 23/08 (2006.01) C08L 23/14 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2470660

Polyolefin compositions comprising (percent by weight): 1) 55 % - 90 % of a crystalline propylene homopolymer or copolymer containing up to 15 % of ethylene and/or C4-C10 .alpha.-olefin(s); 2) 10 % - 45 % of a blend of a copolymer of propylene with more than 15 % up to 40 % of ethylene (copolymer (a)), and a copolymer of ethylene with one or more C4-C10 .alpha.-olefin(s) containing from 10 % to 40 % of said C4-C10 .alpha.-olefin(s) (copolymer (b)), wherein the weight ratio (a)/(b) is from 1/4 to 4/1.

La présente invention se rapporte à des compositions de polyoléfines comprenant (en pourcentage en poids): 1) 55 % à 90 % d'un homopolymère ou d'un copolymère de propylène cristallin contenant jusqu'à 15 % d'éthylène et/ou d'.alpha.-oléfine(s) C¿4?-C¿10?; 2) 10 % à 45 % d'un mélange composé d'un copolymère de propylène comportant plus de 15 % à 40 % d'éthylène (copolymère (a)), et d'un copolymère d'éthylène comportant une ou plusieurs .alpha.-oléfine(s) C¿4?-C¿10? contenant de 10 % à 40 % de ladite ou desdites .alpha.-oléfine(s) C¿4?-C¿10? (copolymère (b)), le rapport en poids des copolymères (a)/(b) étant compris entre 1/4 et 4/1.

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