C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/00 (2006.01) C08F 4/62 (2006.01) C08F 10/00 (2006.01)
Patent
CA 2054246
ABSTRACT Novel hydridotris(pyrazolyl)borate complexes of Group 4 metals of the Periodic Table of the Elements are coordination polymerization catalysts. The complexes are of the formula HY'M'X'n'X3 (I) or [HY'M'X'n'X2]+ A- (II) wherein:- HY is a hydroidotris(pyrazolyl)borate ion in which the pyrazolyl group can be substituted by, for example, C1-C6 alkyl; M is a Group 4 metal, especially titanium or zirconium; each X is an inert anionic ligand, especially OR in formula I and R in formula II, wherein H is phenyl or C1-C6 alkyl or cycloalky; X' is an inert neutral donar ligand; n i3 0 or 1, preferably 0; and A- is a noncoordinating, compatible anion of a Bronsted acid salt. 39,230-F When the complex is of formula I, it is preferably used with an aluminum compound containing Al- O, Al-N or Al-P bonds, especially an alkylaluminoxane, and, optionally, a tri(C1-C6 alkyl)aluminum compound. 39,230-F
Smart & Biggar
The Dow Chemical Company
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