Method for the preparation of a styrene-based polymer

Details Method for the preparation of a styrene-based polymer Method for the preparation of a styrene-based polymer

C - Chemistry, Metallurgy

08

F

402/531, 402/576

C08F 12/08 (2006.01) C08F 4/16 (2006.01)

Patent

CA 1329679

ABSTRACT OF THE DISCLOSURE Binary stereospecific styrene-based polymers composed, substantially, of the isotactic and syndiotactic structures can be prepared by the polymerization of a styrene compound in the presence of a specific catalyst system composed of (a) a solid substance containing titanium and a halogen and insoluble in hydrocarbons and (b) a reaction product of an alkyl aluminum compound, e.g., trimethyl aluminum, with water. The atomic ratio of aluminum to titanium in the catalyst system is a determinant factor for the relative predominance of a stereospecific struc- ture over the other determined by the 13C-NMR method.

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