Cyclopentadienyl Complexes Of Group 6 Substituted By Silyl Halides
AssigneeBasell Polyolefine GmbH
InventorsShahram Mihan, Markus Enders, Pablo Fernandez
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Abstract
Cyclopentadienyl complexes of group 6 having at least one cyclopentadienyl system which is substituted by at least one silyl group which bears at least one halogen substituent and a catalyst system comprising at least one of the cyclopentadienyl complexes, and also a process for preparing them, the use of the catalyst system for the polymerization or copolymerization of olefins and a process for preparing polyolefins by polymerization or copolymerization of olefins in the presence of the catalyst system.
Claims10
A cyclopentadienyl complex of group 6 having at least one cyclopentadienyl system which is substituted by at least one silyl group which bears at least one halogen substituent.
A process for preparing cyclopentadienyl complexes of group 6 having at least one cyclopentadienyl system which bears at least one silyl group SiR2D, where
- D is fluorine, chlorine, bromine or iodine, in particular chlorine or bromine,
- the radicals R are each, independently of one another, hydrogen, C1-C22-alkyl, C2-C22-alkenyl, C6-C22-aryl, arylalkyl having from 1 to 16 carbon atoms in the alkyl part and from 6 to 21 carbon atoms in the aryl part, NR12, N(SiR13)2, OR1, OSiR13, SiR13, where the organic radicals R may also be substituted by halogens and/or two radicals R may also be joined to form a five-, six- or seven-membered ring, and
- the radicals R1 are each, independently of one another, hydrogen, C1-C22-alkyl, C2-C22-alkenyl, C6-C22-aryl, arylalkyl having from 1 to 16 carbon atoms in the alkyl part and from 6 to 21 carbon atoms in the aryl part, where the organic radicals R1 may also be substituted by halogens and/or two radicals R1 may also be joined to form a five-, six- or seven-membered ring,
- which comprises reacting a cyclopentadienyl complex of group 6 comprising at least one cyclopentadienyl system which is substituted by at least one silyl group SiR3 with a boron trihalide BD3.
Dependencies are inferred from the claim text.