C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/52 (2006.01) C07F 17/00 (2006.01) C08F 2/00 (2006.01) C08F 4/76 (2006.01) C08F 10/00 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01) C08F 110/02 (2006.01) C08F 110/06 (2006.01) C08F 210/06 (2006.01) C08F 210/16 (2006.01)
Patent
CA 2072058
Addition polymerization catalysts having a limiting charge separated structure corresponding to the formula: LMX* XA-, wherein: L is a derivative of a substituted delocalized n-bonded group imparting a constrained geometry to the metal active site and containing up to 50 nonhydrogen atoms; M is a metal of Group 4 or the Lanthanide series of the Periodic Table of the Elements; X independently each occurrence is hydride or a hydrocarbyl, silyl or germyl group having up to 20 carbon, silicon or germanium atoms; and A- is an anion of a Lewis acid, A, having relative Lewis acidity greater than or equal to that of phenylbis(perfluorophenyl)borane, said anion being compatible with the metal cation, are prepared by contacting a derivative of a Group 4 or Lanthanide metal corresponding to the formula: LMX2, wherein L, M, and X are as previously defined, with the Lewis acid, A.
Lapointe Robert E.
Mcadon Mark H.
Nickias Peter N.
Stevens James C.
Dow Global Technologies Inc.
Smart & Biggar
The Dow Chemical Company
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