发明授权
- 专利标题： Polypropylene-based calendered article and injection-molded article
- 专利标题（中）： 聚丙烯基压延制品和注塑制品
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申请号： US10089066申请日： 2002-04-05
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公开(公告)号： US06734270B1公开(公告)日： 2004-05-11
- 发明人: Yutaka Minami , Masami Kanamaru , Koji Kakigami , Atsuhiko Ubara
- 申请人： Yutaka Minami , Masami Kanamaru , Koji Kakigami , Atsuhiko Ubara
- 优先权： JP11/285638 19991006; JP11/307135 19991028
- 主分类号： C08F444
- IPC分类号： C08F444
摘要：
A polypropylene-based calendered or injection-molded article satisfying the requirements of (1) having a tensile modulus TM of 5 MPa or higher and (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (° C.) satisfying the formula: TM≧5×Tm−450, is less tacky and excellent in flexibility and transparency. Such a polypropylene-based calendered or injection-molded article is produced from a propylene polymer satisfying the requirements of (1) having a component soluble in a 25° C. hexane in a content H25 of 0 to 80% by weight; (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (° C.) satisfying the formula: &Dgr;H≧6×(Tm−140) wherein &Dgr;H is a melting endotherm (J/g); and (3) having an intrinsic viscosity [&eegr;] of 1 to 3 dl/g as measured at 135° C. in tetralin.
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