发明授权
- 专利标题： Method for the production of low density copolymers of ethylene
- 专利标题（中）： 乙烯低密度共聚物生产方法
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申请号： US784308申请日： 1977-04-04
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公开(公告)号： US4190614A公开(公告)日： 1980-02-26
- 发明人: Akira Ito , Kenji Iwata
- 申请人： Akira Ito , Kenji Iwata
- 申请人地址： JPX Tokyo
- 专利权人： Mitsui Toatsu Chemicals, Incorporated
- 当前专利权人： Mitsui Toatsu Chemicals, Incorporated
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX51-40888 19760413
- 主分类号： C08F2/00
- IPC分类号： C08F2/00 ; C08F2/04 ; C08F2/06 ; C08F4/00 ; C08F4/60 ; C08F4/64 ; C08F10/02 ; C08F210/00 ; C08F210/02 ; C08F210/16 ; C08F297/08 ; C08F4/02 ; C08F255/02
摘要：
In producing a low density polyethylene by a slurry copolymerization of ethylene and an .alpha.-olefin with use of a catalyst consisting of a magnesium compound-supported titanium and/or vanadium compound and an organoaluminum compound, a certain amount of ethylene is subject to a pre-polymerization in the presence of said catalyst prior to the copolymerization. Successively, the slurry copolymerization of ethylene and an .alpha.-olefin is effected in a low-boiling diluent to obtain a low density polyethylene of 0.925-0.950 in density, covering various grades in a wide range.
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