发明名称 |
Process for producing olefin polymers. |
摘要 |
A process for producing an olefin polymer which comprises homopolymerizing or copolymerizing an olefin in a gas phase by using a catalyst system comprising the following components A) and B): A) a solid catalyst component prepared by immobilizing a catalyst component comprising at least titanium, magnesium, halogen and an electron-donative compound on a porous polymer material, said solid catalyst component satisfying the following conditions (a), (b) and (c): (a) ethylene is preliminarily polymerized thereon in an amount of 50-200 g per gram of the component previously immobilized on the porous polymer material. (b) the preliminary polymerization of ethylene is carried out at most at a rate of 3 g/g-immobilized component+/-hour at least until the quantity of the preliminarily polymerized ethylene reaches 5 g/g-immobilized component, and (c) the preliminarily polymerized ethylene polymer has an intrinsic viscosity ÄhÜ of 0.5 dl/g to 2.5 dl/g as measured in tetralin at 135 DEG C; and B) an organoaluminum compound. Thus, an olefin polymer small in the extent of adhesion to polymerization reactor, small in the number of fish-eyes, low in the content of fine powder, high in bulk density and good in fluidity could be produced. |
申请公布号 |
EP0539937(A1) |
申请公布日期 |
1993.05.05 |
申请号 |
EP19920118412 |
申请日期 |
1992.10.28 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
MIYOSHI, YOSHIHIRO;SHIRAISHI, HIROYUKI;KAWAI, KIYOSHI;KOGA, HIDEAKI |
分类号 |
C08F2/34;C08F4/60;C08F4/658;C08F10/00 |
主分类号 |
C08F2/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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