发明名称 |
Ethylene (co) polymer and its use |
摘要 |
An ethylene (co)polymer of the present invention is a (co)polymer with excellent moldability and mechanical properties and either an ethylene homopolymer or a copolymer of ethylene and an α-olefin of 4 to 20 carbon atoms. The (co)polymer has methyl branches measured by 13C-NMR less than 0.1 in number per 1,000 carbon atoms and Mw/Mn measured by GPC not lower than 1.8 and lower than 4.5. The (co)polymer is either an ethylene homopolymer or a copolymer of ethylene and an α-olefin of 3 to 20 carbon atoms. The melt tension (MT) and the swell ratio (SR) satisfy the relation; log(MT)>12.9−7.15×SR; and the intrinsic viscosity ([&eegr;]) and the melt flow rate (MFR) satisfy the relation; [&eegr;]>1.85×MFR−0.192 in the case of MFR<1 and the relation; [&eegr;]>1.85×MFR−0.213 in the case of MFR≧1. Such an ethylene (co)polymer can be usable for various molding applications and especially suitable for pipes.
|
申请公布号 |
US7687579(B2) |
申请公布日期 |
2010.03.30 |
申请号 |
US20050211477 |
申请日期 |
2005.08.26 |
申请人 |
MITSUI CHEMICALS, INC. |
发明人 |
TAKAHASHI MAMORU;KASAI TETSUJI;SAITO JUNJI;MATSUKAWA NAOTO;TSURU KAZUTAKA;MITANI MAKOTO;FUJITA TERUNORI;OTSUZUKI SHIRO;MATSUMOTO TETSUHIRO;TSUTSUI TOSHIYUKI |
分类号 |
C08J5/00;C08F4/64;C08F4/642;C08F4/659;C08F4/6592;C08F10/00;C08F10/02;C08F110/02;C08F210/16;C08F255/02;C08L23/04;C08L23/08;C08L51/06;C08L101/00 |
主分类号 |
C08J5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|