Production of polypropylene having improved properties

Details Production of polypropylene having improved properties Production of polypropylene having improved properties

2007-01-30

2007-01-30

McClendon, Sanza L. (Department: 1711)

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S113000, C522S157000, C522S150000, C522S160000, C522S161000

Reexamination Certificate

active

10332160

ABSTRACT:
A process for producing polypropylene having increased melt strength, the process comprising irradiating polypropylene which has been polymerised using a Ziegler-Natta catalyst with an electron beam having an energy of at least 5 MeV and a radiation dose of at least 10 kGray and mechanically processing the irradiated polypropylene to form long chain branches on the polypropylene molecules, whereby the polypropylene has a melt flow index (MFI) of at least 25 dg/min.

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