Process for the preparation of crystalline vinylaromatic...

Details Process for the preparation of crystalline vinylaromatic... Process for the preparation of crystalline vinylaromatic...

C - Chemistry, Metallurgy

08

F

C08F 12/02 (2006.01) C08F 4/642 (2006.01) C08F 4/646 (2006.01) C08F 12/04 (2006.01)

Patent

CA 2180170

Process for the preparation of crystalline vinylaroma- tic polymers with a predominantly syndiotactic struc- ture which comprises polymerizing the vinylaromatic monomers in the presence of a catalytic system consisting essentially of: a) a complex of titanium having the formula (I): Ti (OCONRR')n (I) wherein R and R', the same or different, represent a C1-C12 aliphatic radical or C6-C12 aromatic radi- cal whereas n is an integer equal to 3 or 4; b) a cocatalyst selected from aluminoxane and a compound of boron having formula (II): BX1X2X3 (II) wherein X1, X2 and X3, the same or different, represent a C1-C20 perfluorinated hydrocarbon radical.

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