Invention Grant
- Patent Title: Propylene resin material and method for the production thereof
- Patent Title (中): 丙烯树脂材料及其制造方法
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Application No.: US14028768Application Date: 2013-09-17
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Publication No.: US09303112B2Publication Date: 2016-04-05
- Inventor: Mitsuyoshi Shimano , Hiroyoshi Nakajima
- Applicant: Sumitomo Chemical Company, Limited
- Applicant Address: JP Tokyo
- Assignee: Sumitomo Chemical Company, Limited
- Current Assignee: Sumitomo Chemical Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Panitch Schwarze Belisario & Nadel LLP
- Priority: JP2012-209240 20120924
- Main IPC: C08F293/00
- IPC: C08F293/00 ; C08L53/00 ; C08L23/12 ; C08K5/14

Abstract:
Disclosed are a propylene resin material capable of affording a molded article superior in impact properties, tensile properties, and appearance, and a method for producing the same. The propylene resin material includes a propylene homopolymer portion and a propylene-ethylene copolymer portion and satisfies specific requirements. The production method includes the step of mixing an organic peroxide with a propylene polymeric material produced via a multistage polymerization process using a polymerization catalyst and comprising a propylene homopolymer portion and a propylene-ethylene copolymer portion, the step of heating the mixture obtained via the mixing step, at a temperature lower than a decomposition temperature of the organic peroxide at which the half-life of the organic peroxide is one minute, and the step of washing the mixture heated in the heating step, with a medium containing an organic solvent.
Public/Granted literature
- US20140088255A1 PROPYLENE RESIN MATERIAL AND METHOD FOR THE PRODUCTION THEREOF Public/Granted day:2014-03-27
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