发明授权
- 专利标题： Process for the preparation of a syndiotactic polyolefin
- 专利标题（中）： 制备烯烃聚合物的方法
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申请号： US962032申请日： 1992-10-15
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公开(公告)号： US5239022A公开(公告)日： 1993-08-24
- 发明人: Andreas Winter , Martin Antberg , Walter Spaleck , Jurgen Rohrmann , Volker Dolle
- 申请人： Andreas Winter , Martin Antberg , Walter Spaleck , Jurgen Rohrmann , Volker Dolle
- 申请人地址： DEX Frankfurt
- 专利权人： hoechst Aktiengesellschaft
- 当前专利权人： hoechst Aktiengesellschaft
- 当前专利权人地址： DEX Frankfurt
- 优先权： DEX4035885 19901112
- 主分类号： C08F4/64
- IPC分类号： C08F4/64 ; C08F4/659 ; C08F4/6592 ; C08F10/00 ; C08F110/02 ; C08F110/06 ; C08F210/06
摘要：
A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single-membered or multimembered chain in which R.sup.7 may furthermore be a (substituted) hetero atom, m+n is zero or 1 and R.sup.10 is hydrogen. The catalyst system gives polymers having high stereospecificity and a high melting point.
公开/授权文献
- US4242039A Pump impeller seals with spiral grooves 公开/授权日：1980-12-30
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