Multi-layer blow molded article of polypropylene

Details Multi-layer blow molded article of polypropylene Multi-layer blow molded article of polypropylene

1996-01-16

1999-03-30

Thibodeau, Paul

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428516, 428 3691, 428519, B32B 2732

Patent

active

058886362

ABSTRACT:
A multi-layer blow molded article of a polypropylene comprising at least two layers, wherein at least one layer of the inner layer or layers comprises a resin composition containing 100-50 parts by weight of a syndiotactic polypropylene with an Mw/Mn of 3.0 or more and 0-50 parts by weight of an ethylene-.alpha.-olefin copolymer elastomer, and the outermost layer comprises a syndiotactic polypropylene with an Mw/Mn of less than 3.0, an isotactic polypropylene with an Mw/Mn of 6.0 or less, a resin composition containing 99-50 parts by weight of either of said polypropylenes and 1-50 parts by weight of an ethylene-.alpha.-olefin copolymer elastomer, or a polypropylene formed by heat degradation of a syndiotactic or isotactic polypropylene and having an Mw/Mn of 3.0 or more.

REFERENCES:
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patent: 5591817 (1997-01-01), Asanuma et al.
patent: 5620803 (1997-04-01), Oyama et al.
patent: 5637367 (1997-06-01), Asnuma et al.
A. J. Pearson, "Metallo-organic Chemistry" John Wiley & Sons, p. 310, 1985.

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