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...
Patent
1996-11-29
1998-11-17
Morgan, Kriellion S.
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...
C08K 334
Patent
active
058377646
ABSTRACT:
A polypropylene resin composition comprising the following components (A), (B), (C) and (D): (A) a crystalline ethylene-propylene block copolymer containing a room-temperature-p-xylene-soluble fraction Ac having an ethylene content of 12-26% by weight and an intrinsic viscosity (measured at 135.degree. C. in decalin) of 6 dl/g or more, (B) a crystalline ethylene-propylene block copolymer containing a room-temperature-p-xylene-soluble fraction Bc having an ethylene content of 27-50% by weight and an intrinsic viscosity (measured at 135.degree. C. in decalin) of 4 dl/g or less, (C) an ethylene-.alpha.-olefin copolymer obtained by polymerization using a single-site catalyst, having a molecular weight distribution (Mw/Mn) of 2.5 or less, a melt flow ratio (MI.sub.10 /MI.sub.2.16) of 6-15 (wherein MI.sub.10 is a melt index measured at 190.degree. C. under a load of 10 kg and MI.sub.2.16 is a melt index measured at 190.degree. C. under a load of 2.16 kg) and an .alpha.-olefin proportion of 70 mole % or less, and (D) a talc having an average particle diameter of 3-7 .mu.m as measured by laser diffraction. In the composition the weight ratios As and Bs of the room-temperature-p-xylene-soluble fractions Ac and Bc to the total weight of the components (A) and (B) satisfy the following formulas (1) and (2):
REFERENCES:
patent: 4439573 (1984-03-01), Fukui et al.
patent: 5001182 (1991-03-01), Maruya et al.
patent: 5045589 (1991-09-01), Ueno
patent: 5308908 (1994-05-01), Fukui et al.
Akagawa Tomohiko
Hinenoya Saburo
Inoue Kaoru
Nishio Takeyoshi
Nomura Takao
Morgan Kriellion S.
Toyota Jidosha & Kabushiki Kaisha
Ube Industries Ltd.
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