Polymer blends from interpolymer of ethylene/alpha-olefin...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 297/08 (2006.01) C08F 2/38 (2006.01) C08F 4/646 (2006.01) C08L 23/00 (2006.01)

Patent

CA 2601241

Disclosed herein are polymer blends comprising at least one ethylene/.alpha.- olefm interpolymer and two different polyolefins which can be homopolymers. The ethylene/.alpha.- olefm interpolymers are block copolymers comprising at least a hard block and at least a soft block. In some embodiments, the ethylene/.alpha.-olefin interpolymer can function as a compatibilizer between the two polyolefins which may not be otherwise compatible. Methods of making the polymer blends and molded articles made from the polymer blends are also described.

L'invention porte sur des mélanges de polymères comportant au moins un interpolymère d'éthylène/alphaoléfine, à compatibilité améliorée, et deux polyoléfines pouvant être des homopolymères. Les interpolymères d'éthylène/alphaoléfine sont des copolymères blocs comprenant au moins un bloc dur et au moins un bloc mou. Dans certaines exécutions, l'interpolymère d'éthylène/alphaoléfine peut servir de compatibiliseur entre les deux polyoléfines qui peuvent n'être pas compatibles. L'invention porte également sur des procédés d'élaboration desdits mélanges de polymères, et sur des articles moulés en étant faits.

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