C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/643 (2006.01) C08F 12/04 (2006.01) C08F 12/06 (2006.01)
Patent
CA 2113177
2113177 9303067 PCTABS00019 A process for preparing syndiotactic vinyl aromatic polymers comprising contacting at least one polymerizable vinyl aromatic monomer under polymerization conditions with a catalyst comprising a compound corresponding to the formula: LmMXn + RA, wherein L is a delocalized .pi.-bonding group containing up to 50 nonhydrogen atoms; m is 0 or 1; M is a metal of Group 4 of the Periodic Table; X each occurrence is an inert, anionic ligand containing up to 20 nonhydrogen atoms; n is an integer greater than or equal to 1 and the sum of m and n is one less than the valence of M; and RA is RB(C6F5)C3, where R is hydride, hydrocarbyl, silyl, a combination thereof or a substituted derivative thereof having up to 20 nonhydrogen atoms. Also included is a process for preparing the catalyst.
Smart & Biggar
The Dow Chemical Company
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