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...
Reexamination Certificate
2011-04-12
2011-04-12
Harlan, Robert D. (Department: 1762)
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...
C524S451000, C524S847000, C524S505000, C524S515000, C525S240000
Reexamination Certificate
active
07923501
ABSTRACT:
A polypropylene resin composition contains 2 to 15 wt % of a moldability improver (A) and 85 to 98 wt % of a polypropylene resin (B). The moldability improver (A) is formed of propylene block copolymers (A-1) and (A-2). Each of the propylene block copolymers (A-1) and (A-2) has a crystalline propylene polymer component (A-11), (A-21) and a propylene-ethylene random copolymer component (A-12), (A-22). The propylene block copolymer (A-1) is characterized in that the melt flow rate of the crystalline propylene polymer component (A-11) is high, whereas the propylene block copolymer (A-2) is characterized in that the content ratio of the propylene-ethylene random copolymer component (A-22) is high. The polypropylene resin (B) is formed of a propylene-ethylene block copolymer (B-1), at least one of an ethylene elastomer and a styrene elastomer (B-2) and an inorganic filler (B-3).
REFERENCES:
patent: 6916886 (2005-07-01), Morioka et al.
patent: 2005/0228141 (2005-10-01), Moritomi et al.
patent: 2006/0160942 (2006-07-01), Kanzaki
patent: 10 2006 001 127 (2006-07-01), None
patent: 0 879 853 (1998-11-01), None
patent: 1 086 986 (2001-03-01), None
patent: 2003-253083 (2003-09-01), None
patent: 2004/18647 (2004-01-01), None
patent: 2006-219667 (2006-08-01), None
patent: 2006-219667 (2006-08-01), None
patent: WO 91/04257 (1991-04-01), None
patent: WO 2006/075637 (2006-07-01), None
JIS K 7210, Testing Method for Melt Flow Rate of Thermoplastic, 1976, pp. 590-604.
JIS K 7203, Testing Method for Flexural Properties of Rigid Plastics, 1982, pp. 303-311.
JIS K 7110, Method of Izod Impact Test for Rigid Plastics, 1994, pp. 177-203.
ASTM D 1238-04, Standard Test method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer, Apr. 2004, pp. 269-281.
Saotome Mineyuki
Sato Takayuki
Shimouse Masashi
Takaragi Sinichi
Zanka Yukihito
Foley & Lardner LLP
Harlan Robert D.
Nissan Motor Co,. Ltd.
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