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 4/646 (2006.01) C08F 4/58 (2006.01) C08F 12/00 (2006.01) C08F 12/04 (2006.01)

Patent

CA 2191361

Process for the preparation of crystalline vinylaroma- tic polymers with a predominantly syndiotactic struc- ture which comprises polymerizing vinylaromatic mono- mers, alone or mixed with at least one other monomer, in the presence of a catalytic system essentially consisting of: a) a complex of titanium or zirconium selected from those having general formula: MR1R2R3R4, A1MR1R2R3, A1A2MR1R2 (I) b) a co-catalyst selected from an alkylalumoxane and a compound of boron having formula (II): BX1X2X3 (II) or one of its salts; c) a derivative of tin having general formula: SnR5R6R7R8 (III)

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