- 专利标题: Process for producing propylene resin composition
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申请号: US12656841申请日: 2010-02-17
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公开(公告)号: US08278392B2公开(公告)日: 2012-10-02
- 发明人: Satoru Moritomi , Takashi Sanada , Mitsuyoshi Shimano
- 申请人: Satoru Moritomi , Takashi Sanada , Mitsuyoshi Shimano
- 申请人地址: JP Tokyo
- 专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人地址: JP Tokyo
- 代理机构: Foley & Lardner LLP
- 优先权: JP2004-117577 20040413
- 主分类号: C08F297/08
- IPC分类号: C08F297/08 ; C08F4/00
摘要:
Disclosed are processes for producing polypropylene resin compositions including two or three sorts of propylene-based polymeric materials, the processes including a first step of melt-kneading at least a propylene-α-olefin block copolymer containing a polymer portion composed mainly of propylene and a propylene-α-olefin copolymer portion having a relatively high intrinsic viscosity and a second step of melt-kneading the product of the first step with a propylene-ethylene block copolymer containing a polymer portion composed mainly of propylene and a propylene-ethylene copolymer portion having a relatively low intrinsic viscosity or a polymer portion composed mainly of propylene having a relatively low intrinsic viscosity. In the composition produced by these processes, no or substantially no fish eyes develop.
公开/授权文献
- US20100152385A1 Process for producing propylene resin composition 公开/授权日:2010-06-17