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Patent Searching and Data


Title:
POLYPROPYLENE RESIN COMPOSITION FOR INJECTION MOLDING, MOLDED ARTICLE, CONTAINER, AND LID
Document Type and Number:
WIPO Patent Application WO/2012/081667
Kind Code:
A1
Abstract:
This polypropylene resin composition for injection molding contains a propylene resin material. The intrinsic viscosity of the xylene-soluble portion of said polypropylene resin composition is 0.8 to 1.4 dl/g, and the melt flow rate of the polypropylene resin composition is 20 to 40 g/10 min. The aforementioned propylene resin material is obtained by polymerizing an ethylene/1-butene copolymer, containing 74% to 86% ethylene units by mass, in the presence of an ethylene/propylene copolymer which contains 2.0% to 4.0% ethylene units by mass. Said ethylene/1-butene copolymer constitutes 25% to 35% of the mass of the polypropylene resin composition. This invention makes it possible to provide a polypropylene resin composition for injection molding that exhibits excellent blushing resistance and low-temperature impact strength.

Inventors:
NAKAJIMA TAKESHI (JP)
KANNO SHITOSHI (JP)
TSURUMI NOBUYUKI (JP)
SAKAI KAZUHIKO (JP)
Application Number:
PCT/JP2011/079046
Publication Date:
June 21, 2012
Filing Date:
December 15, 2011
Export Citation:
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Assignee:
SUNALLOMER LTD (JP)
NAKAJIMA TAKESHI (JP)
KANNO SHITOSHI (JP)
TSURUMI NOBUYUKI (JP)
SAKAI KAZUHIKO (JP)
International Classes:
C08L23/14; B29C45/00; C08F2/44; C08F210/02; C08F255/04; C08J5/00; C08L23/08
Foreign References:
JP2005530901A2005-10-13
JP2005530900A2005-10-13
JPH08208782A1996-08-13
JP2011140640A2011-07-21
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
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Claims: