Process for producing polyolefin

Details Process for producing polyolefin Process for producing polyolefin

2006-08-22

2006-08-22

Teskin, Fred (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C525S240000, C524S584000, C264S290200, C264S291000

Reexamination Certificate

active

07094856

ABSTRACT:
Process for the production of an oriented polyolefin film using multi-component polymer compositions. One polymer component comprises an isotactic propylene homopolymer produced by the polymerization of propylene with a Ziegler-Natta catalyst. A secondary component is a Ziegler-Natta polymerized ethylene-propylene random copolymer or a metallocene-polymerized ethylene-propylene random copolymer produced by the polymerization of propylene and ethylene in the presence of a metallocene polymerization catalyst. The Ziegler-Natta polymerized copolymer is produced by the polymerization of ethylene and propylene in the presence of a Ziegler-Natta catalyst and contains no more than 0.5 wt. % ethylene and has a xylene solubles content of at least 2 wt. %. The primary and secondary polymer components are mixed together to provide a blend in which, when the secondary component is a Ziegler-Natta polypropylene, is present in an amount within the range of 5–25 wt. % and the secondary polymer component is a metallocene-based copolymer present in an amount of less than 5 wt. %. After mixing the two polymer components together, the mixture is extruded and the formed into a biaxially oriented film.

REFERENCES:
patent: 3952073 (1976-04-01), Isaka et al.
patent: 2002/0032295 (2002-03-01), Peiffer et al.
patent: 2004/0014896 (2004-01-01), Datta et al.

Affiliated with

Also associated with

Rating

Process for producing polyolefin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing polyolefin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing polyolefin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3653724