发明授权
- 专利标题： Ethylene-&agr;-olefin copolymer and polyethylene composition
- 专利标题（中）： 乙烯-α-烯烃共聚物和聚乙烯组合物
-
申请号： US09649619申请日： 2000-08-29
-
公开(公告)号： US06667375B1公开(公告)日： 2003-12-23
- 发明人: Tadahiro Mitsuno , Seiichiro Ima , Hiroyuki Shiraishi
- 申请人： Tadahiro Mitsuno , Seiichiro Ima , Hiroyuki Shiraishi
- 优先权： JP11-245626 19990831; JP11-251557 19990906
- 主分类号： C08F442
- IPC分类号： C08F442
摘要：
An ethylene-&agr;-olefin copolymer obtained by a gas phase polymerization method in the presence of a catalyst, wherein the copolymer satisfies the following conditions (A-1) to (A-4): (A-1) Melt flow rate (MFR): 0.3 to 5.0 g/10 minutes (A-2) Melt flow rate ratio (MFRR): 20 or more (A-3) Density (d): 0.910 to 0.930 g/cm3 (A-4) Coldxylene-soluble portion (CXS)(wt %) is in the range defined by the formula (1): 1.5×10−4×d−125×MFR0.5+0.3≧CXS formula (1).