Molded product of a polypropylene resin

Details Molded product of a polypropylene resin Molded product of a polypropylene resin

1995-05-08

1997-02-04

Bleutoe, John C.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524425, 524449, 524451, 524496, 524502, 524511, 524529, 524582, 524240, C08C 2312

Patent

active

055998658

ABSTRACT:
The invention relates to a molded product containing 65 to 95% by weight of a polymer composition and 5 to 35% by weight of an inorganic filler. The polymer composition is a mixture of 45 to 70 parts by weight of a polypropylene resin having a melt flow rare of 10 to 60 g/10 minute and containing 0 to 8% by weight of ethylene, and 30 to 55 parts by weight of an amorphous ethylene-.alpha.-olefin copolymer. The proportion (D) of the filler and that (C) of the copolymer have the relation expressed as D>155-37 lnC. The copolymer is a mixture of 30 to 60% by weight of a high-molecular copolymer having a weight-average molecular weight of 380,000 to 1,000,000 and 40 to 70% by weight of a low-molecular one having weight-average molecular weight of 150,000 to 330,000. The product has a coefficient of linear expansion not exceeding 5.0.times.10.sup.-5 cm/cm/.degree.C.

REFERENCES:
patent: 5001182 (1991-03-01), Maruya et al.
patent: 5189106 (1993-02-01), Morimoto et al.
patent: 5252659 (1993-10-01), Koizumi et al.
Japanese patent abstracts of Nos. 1-271450; 2-311533; 63-95252; 63-186754; 62-153334; 61-34048; 61-21145 1989; 1990; 1988; 1988; 1990; 1986; 1986.

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