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    Ethylene/Alpha-olefin copolymer and process for preparing the same
    4.
    发明公开
    Ethylene/Alpha-olefin copolymer and process for preparing the same 有权
    乙烯/α-烯烃共聚物和Verfahren zu seiner Herstellung

    公开(公告)号：EP0926169A2

    公开(公告)日：1999-06-30

    申请号：EP98310650.1

    申请日：1998-12-23

    申请人： Mitsui Chemicals, Inc.

    发明人： Sugimura, Kenji ,  Yoshitsugu, Ken ,  Takahashi, Mamoru ,  Nakagawa, Takashi

    IPC分类号： C08F210/16 ,  C08F4/646

    CPC分类号： C08F210/16 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65925 ,  C08F10/00 ,  Y10S526/943 ,  C08F4/65904 ,  C08F210/14 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/20 ,  C08F2500/26

    摘要： A copolymer (A) of ethylene and an α-olefin having 6 to 8 carbon atoms, the copolymer having:

    (A-i) a melt tension (MT) at 190°C and a melt flow rate (MFR) which satisfy the relationship 9.0×MFR -0.65 > MT > 2.2×MFR -0.84 ;
    (A-ii) a flow activation energy ((E a )×10 -4 J/molK) determined from a shift factor of time-temperature superposition of the flow curve, a carbon atom number (C) of the α-olefin in the copolymer and a α-olefin content (x mol%) in the copolymer which satisfy the following relationship (0.039Ln(C-2)+0.0096)×x+2.87 a )×10 -4 ≤ (0.039Ln(C-2)+0.1660)×x+2.87; and
    (A-iii) a haze value when formed into a film having a thickness of 30 µm by inflation molding, a density (d) in g/cm 3 and a melt tension (MT) which satisfy the following relationships:
    when the flow index (FI) defined as a shear rate when the shear stress reaches 2.4×10 6 dyne/cm 2 at 190°C and the melt flow rate (MFR) satisfy the relationship FI ≥ 100×MFR , Haze 1.4 )×(C-3) 0.1 when the carbon atom number (C) of the α-olefin is 6, or Haze 1.4 ) when the carbon atom number (C) of the α-olefin is 7 or 8,
    and
    when the flow index (FI) defined as a shear rate when the shear stress reaches 2.4×10 6 dyne/cm 2 at 190°C and the melt flow rate (MFR) satisfy the relationship FI , Haze 1.4 )×(C-3) 0.1 when the carbon atom number (C) of the α-olefin is 6, Haze 1.4 ) when the carbon atom number (C) of the α-olefin is 7 or 8.

    摘要翻译： 乙烯与碳原子数为6〜8的α-烯烃的共聚物（A），该共聚物在（190℃）下具有：（A 1）熔体张力（MT），熔体流动速率（MFR）满足关系式 （A-ii）由流动曲线的时间 - 温度叠加的偏移因子确定的流动活化能（（Ea）×10 -4 J / mol K），α-烯烃的碳原子数（C） 在共聚物中的α-烯烃含量（xmol％），当通过吹塑成型形成厚度为30μm的膜时，共聚物中的α-烯烃含量（xmol％）满足以下关系式（A-iii）时的雾度值， 满足以下关系的密度（d）（g / cm 3）和熔体张力（MT）：当剪切应力达到2.4×10 6达因/厘米时剪切速率的流动指数（FI） <2>，当碳原子数为（C））时，当α-烯烃的碳原子数（C）为6时，熔体流动速率（MFR）满足关系FI≥100xMFR， （C）的alph α-烯烃为7或8，并且当在190℃下剪切应力达到2.4×10 6达因/厘米2且熔体流动速率（MFR）时定义为剪切速率的流动指数（FI）满足 当α-烯烃的碳原子数（C）为7或8时，当α-烯烃的碳原子数（C）为6，时，关系FI <100xMFR，。