发明名称 |
PROCESS FOR THE PRODUCTION OF STEREOREGULAR POLYMERS AND ELASTOMERS OF .ALPHA.-OLEFINS AND CERTAIN NOVEL CATALYSTS THEREFOR |
摘要 |
The present invention provides a process for the pressure modulated polymerization of one or more .alpha.-olefins having at least 3 carbon atoms, which comprises: contacting the monomer or monomers in a polar or non-polar solvent under polymerization conditions with a homogeneous catalyst system including: a) a cationic form of a racemic mixture of a chiral octahedral transition metal complex or of a non chiral octahedral transition metal complex, comprising 1, 2 or 3 bidentate chelating ligands and no cyclopentadienyl ligands and having C1, C2, or C3 symmetry, provided that when a complex comprising only a single ligand is used for the production of stereoregular polystyrene, said single ligand has natural chirality, and b) an anion of a Lewis acid or a Brönsted acid; and adjusting the pressure so as to obtain at will either a highly stereoregular polymer or copolymer or an elastomer.
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申请公布号 |
CA2298772(A1) |
申请公布日期 |
1999.02.04 |
申请号 |
CA19982298772 |
申请日期 |
1998.07.24 |
申请人 |
TECHNION RESEARCH AND DEVELOPMENT FOUNDATION LTD. |
发明人 |
SHMULINSON, MICHAL;EISEN, MORIS S.;AVERBUJ, CLAUDIA;VOLKIS, VICTORIA;TISH, EDITH |
分类号 |
C08F4/00;C08F4/02;C08F4/44;C08F4/60;C08F4/602;C08F4/642;C08F4/659;C08F10/00;C08F12/08;C08F110/06;C08F210/06;(IPC1-7):C08F10/00 |
主分类号 |
C08F4/00 |
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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