Thermoplastic propylene elastomers and one pot/two catalysts...

Details Thermoplastic propylene elastomers and one pot/two catalysts... Thermoplastic propylene elastomers and one pot/two catalysts...

C - Chemistry, Metallurgy

08

L

C08L 23/12 (2006.01) C08F 4/646 (2006.01) C08L 23/10 (2006.01) C08L 23/14 (2006.01)

Patent

CA 2209773

This invention relates to polypropylene blends, particularly blends of high molecular weight amorphous polypropylene with lower molecular weight isotactic polypropylene. These blends exhibit unusual elastomeric properties. This invention also relates to the production of polypropylene blend compositions using at least two catalyst systems, one for producing amorphous polypropylene and one for producing crystalline polypropylene.

La présente invention concerne des mélanges de polypropylènes, en particulier des mélanges de polypropylène amorphe de poids moléculaire élevé et de polypropylène isotactique de poids moléculaire plus bas. Ces mélanges possèdent des propriétés d'élastomère inhabituelles. La présente invention concerne aussi la production de compositions pour mélanges de polypropylènes utilisant au moins deux systèmes de catalyse, l'un pour produire un polypropylène amorphe, l'autre pour produire un polypropylène cristallin.

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