Processes

Details Processes Processes

C - Chemistry, Metallurgy

08

F

402/374

C08F 4/54 (2006.01) C08F 4/50 (2006.01)

Patent

CA 2032804

ABSTRACT QM 35561 "PROCESSES" A process for addition polymerisation of vinylic (in particuar methacrylic) monomers at a temperature in the range of -20 to 60°C, in the presence of a catalyst comprising: (a) a first component of empirical formula (I): MT (I) wherein M is an alkali metal atom; and T is bulky hydrocarbyl which contains at least 4 carbon atoms and is optionally substituted by one or more pendent substituents, or hetero-substituted hydrocarbyl, each of which is inert in the process conditions; and (b) a (co-catalyst) second component comprising a compound of empirical formula (II): Q(Xm)(Yn)Zp (II) wherein Q is Al, B or Zn; m, n and p are each 0 or an integer such that (m ~ n + p) = 2 or 3 (depending on the appropriate valency of Q; and X, Y and Z are each independently optionally substituted bulky hydrocarbyl, or X and Y together are optionally substituted hydrocarbadiyl, and Z is optionally substituted bulky hydrocarbyl, all of which groups are inert in the process conditions.

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