Crystalline propylene copolymer compositions having improved...

Details Crystalline propylene copolymer compositions having improved... Crystalline propylene copolymer compositions having improved...

C - Chemistry, Metallurgy

08

L

C08L 23/14 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2459938

Propylene polymer compositions comprising (by weight): A) from 15% to 60% with C4-C8 alpha-olefin(s), containing more than 10%, but less than 14%, of said C4- C8 alpha-olefins (s); B) from 40% to 85% of a copolymer of propylene with C4- C8 alpha-olefin(s), preferably butene, containing from 14% to 30% of said C4- C8 alpha-olefin(s), and optionally from 0,5% to 3% of ethylene; provided that the total content of C4-C8 alpha-olefin(s) in the propylene polymer composition be higher than 10%.

L'invention concerne des compositions de polymère du propylène contenant (en poids) : A) entre 15 % et 60 % de C¿4?-C¿8? alpha-oléfine(s), plus de 10 %, mais moins de 14 %, desdites C¿4?-C¿8? alpha-oléfine(s), B) entre 40 % et 85 % d'un copolymère de propylène avec C¿4?-C¿8? alpha-oléfine(s), de préférence du butène, contenant entre 14 % et 30 % desdites C¿4?-C¿8? alpha-oléfine(s), et facultativement entre 0,5 % et 3 % d'éthylène, à condition que le contenu total de C¿4?-C¿8? alpha-oléfine(s) dans la composition de polymère du propylène soit supérieur à 10 %.

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