Polypropylene thermoplastic elastomer compositions having...

Details Polypropylene thermoplastic elastomer compositions having... Polypropylene thermoplastic elastomer compositions having...

C - Chemistry, Metallurgy

08

L

C08L 23/16 (2006.01) C08L 23/12 (2006.01) C08L 23/26 (2006.01)

Patent

CA 2334533

Thermoplastic elastomer compositions having improved processability while maintaining good physical properties are prepared from a mixture of olefinic rubber and a polypropylene composition having a melt flow rate in the range of from about 0.5 to about 5 dg/min. and a molecular weight distribution Mw/Mn of greater than 5.5 up to about 20. The rubber component of the mixture may be at least partially cured by dynamic vulcanization.

L'invention concerne des compositions élastomères thermoplastiques possédant une transformabilité accrue ainsi que des bonnes propriétés physiques. On fabrique lesdites compositions à partir d'un mélange de caoutchouc oléfinique et d'une composition polypropylénique possédant une vitesse de fluage de l'ordre d'environ 0,5 à environ 5 dg/min. et une répartition du poids moléculaire Mw/Mn supérieure à 5,5 et pouvant atteindre environ 20. Le composant caoutchouc du mélange peut être au moins partiellement traité par vulcanisation dynamique.

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