High molecular weight polyolefin and catalyst and process...

Details High molecular weight polyolefin and catalyst and process... High molecular weight polyolefin and catalyst and process...

2005-04-12

2005-04-12

Lu, Caixia (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000, C526S348200, C526S348300

Reexamination Certificate

active

06878790

ABSTRACT:
The present invention relates to polyolefins and in particular to polyolefins comprising C3-C20monomers and having a molecular weight of at least 700 kg/mol preferably 1000 kg/mol. The present invention further relates to a hafnium based metallocene catalyst and a process for making such polyolefins.

REFERENCES:
patent: 4522982 (1985-06-01), Ewen
patent: 5747621 (1998-05-01), Resconi et al.
patent: WO 9205208 (1992-04-01), None
patent: WO 9952955 (1999-10-01), None
Mansel S., et al., “Synthesis and Properties of Elastometric Poly(propylene)”, Macromolecular Chemistry and Physics, Wiley-VCH Verlag GmbH, Weinheim, Germany, vol. 200, No. 6, Jun. 6, 1999, pp. 1292-1297.

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