Polypropylene resin composition, polypropylene resin foamed mate

Details Polypropylene resin composition, polypropylene resin foamed mate Polypropylene resin composition, polypropylene resin foamed mate

1995-07-17

1997-04-01

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 94, C08J 910

Patent

active

056166273

ABSTRACT:
The present invention relates to a polypropylene resin composition containing about 90 to 60 parts by weight of a polypropylene block copolymer (A); and about 10 to 40 parts by weight of a polyethylene resin (B), wherein the polypropylene block copolymer is a polypropylene block copolymer which contains about 99 to 90% by weight of a crystalline polypropylene (a) and about 1 to 10% by weight of an amorphous ethylene-.alpha.-olefin copolymer (b) and has a melt flow rate (MFR) of about 2 to 15 g/10 minutes, and a die swell ratio, measured by a capillary rheometer, of at least 1.7. Foamed materials containing a fine and uniform foam are obtainable from this composition.

REFERENCES:
patent: 3608009 (1971-09-01), Changani
patent: 3846349 (1974-11-01), Harada et al.
patent: 4510031 (1985-04-01), Matsumura et al.
JP-A-54-3874, Jan. 1979 (Derwent Abstracts).
JP-A-55-31807, Mar. 1980 (Derwent Abstracts).
JP-A-55-31808, Mar. 1980 (Derwent Abstracts).

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