Abstract:
Addition polymerization catalysts comprising a derivative of a titanium or zirconium in the +4 oxidation state prepared by metal center oxidation and cation complex formation of a reduced metal precursor complex via electron transfer in a single step by use of a neutral organic oxidant, optionally in the presence of a Lewis acid mitigator.
Abstract:
Dimeric Group 4 metal metallocene compounds wherein the metal is in the +3 formal oxidation state useful as components of catalysts for addition polymerizations.
Abstract:
Metal complexes comprising a polydentate chelating group, catalysts and polymerization processes using the same for the polymerization of olefins, especially propylene, are disclosed.
Abstract:
A process for preparing homopolymers and copolymers of addition polymerizable monomers, or mixtures of such monomers, and the resulting polymer, wherein the process comprising contacting said monomer or mixture under high monomer conversion polymerization conditions with a catalyst composition comprising: a) a catalyst system comprising a Group 3-10 metal complex; and c) a silane, or hydrocarbylsilane corresponding to the formula: JjSiH4-j or AnJjSiH4-(n+j) wherein: J is C1-40 hydrocarbyl, A is a C2-20 alkenyl group, n is 1 or 2, and j is 0 or 1; wherein the polymer comprises from 0.1 to 100 long chain branches per 10,000 carbons, and at least some of which comprise a silane branching center.
Abstract:
Metal complexes, addition polymerisation catalysts containing the same and olefin polymerisation processes using the same comprising a boratabenzene group or divalent derivative thereof are disclosed.
Abstract:
Group 4 metal complexes useful as addition polymerization catalysts are prepared by electrolysis of cyclopentadienyl metal complexes under inert electrolysis conditions.