Catalysts

Details Catalysts Catalysts

C - Chemistry, Metallurgy

08

F

252/1, 402/374

C08F 4/16 (2006.01) C08F 4/42 (2006.01)

Patent

CA 1318306

QM 34572 ABSTRACT CATALYSTS A catalyst for addition polymerisation comprising (a) an (initiator) first component of formula (I): M(Xm)(Yn)zP (I) wherein M is Si, Ge or Sn m and p are each an integer and n is 0 or an integer such that (m + n + p) =4; X is QR1R22 where Q is N, P, As or P(=T)G.D where T is O or S and G and D are each independently a bond, O or S and R1 and R2 are each independently optionally substituted hydrocarbyl or together are optionally substituted hydrocarbadiyl which are inert in the process conditions of the present invention, or, when Q is P(=T)G.D as hereinbefore defined, R1 and R2 are each independently M(Yn)Zp as hereinbefore defined. Y is independently any group as defined for X, or any group selected from a group OA where A is optionally substituted hydrocarbyl inert in the process conditions of the present invention, or trialkylsilylalkyl; Z is independently any group as defined for Y, or an organic polymer radical comprising further M(Yn)Zp moieties; or p is 2 and Z2 is a group Z18 of the formula - OSiR5R5OSiR7R8O-where R5, R6, R7 and R8 are each independently selected from any of the values defined for R1 or R2, or Z12 is a moiety -EBE- where E is a bond or O and B is a polymer diradical, or E is O and b is an inorganic solid on whose surface the two -O- groups are located, which comprises further -OMXmYnO moieties; (b) and a (co-catalyst) second component salt comprising an anion selected from, azide, cyanide, cyanate, fluoride, bifluoride, nitrate and organic mono- and poly-phosphonates, -phosphinates -sulphonates, -sulphinates, -carboxylates, -siloxides and -oxides (including aliphatic and aromatic anions of these types).;and a cation which in use of the catalyst is inert under the polymerisation process conditions yet renders the co-catalyst available in the polymerising medium, initiator components for such catalysts, compositions comprising such components, and a polymerisation process, in particular the addition polymerisation of vinylic monomers, using the catalysts.

586926

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