Dynamically vulcanizable polyolefin compositions

Details Dynamically vulcanizable polyolefin compositions Dynamically vulcanizable polyolefin compositions

C - Chemistry, Metallurgy

08

L

C08L 23/08 (2006.01) C08J 3/24 (2006.01) C08L 23/10 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2194856

The present invention relates to polyolefin compositions comprising: (a) 20 to 50 parts by weight of a particular propylene polymer having an mwd greater than 3.5; and (b) 50 to 80 parts by weight of an elastomeric ethylene copolymer having a low enthalpy of fusion and a narrow mwd. The compositions of the invention are capable of giving, after dynamic vulcanization, thermoplastic elastomeric products having optimum elastomeric properties and a good balance of physico-mechanical properties.

Compositions de polyoléfines qui comprennent (a) de 20 à 50 parties en poids d'un polymère de propylène particulier ayant un répartition des poids moléculaires (mwd) supérieure à 3,5 et (b) 50 à 80 parties en poids d'un copolymère d'éthylène élastomère ayant une faible enthalpie de fusion et une mwd étroite. Les compositions de la présente invention sont capables de fournir, après vulcanisation dynamique, des produits élastomères thermoplastiques ayant des propriétés élastomères optimales et un bon équilibre des propriétés physico-mécaniques.

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