Process for producing styrenic polymer

Details Process for producing styrenic polymer Process for producing styrenic polymer

1996-07-22

1997-04-22

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 77, 526133, 526134, 526150, 526153, 526170, 526346, C08F 1208

Patent

active

056230346

ABSTRACT:
There is disclosed a process for producing a syndiotactic polystyrene (SPS) which comprises polymerizing a styrenic monomer having a content of indene-based compounds of at most 50 ppm by bringing a polymerization catalyst into contact with the above styrenic monomer, which catalyst preferably comprises an (A) transition metal compound (e.g. Ti compound) and (B) an (a) compound capable of reacting with the above transition metal compound (component (A)) to form an ionic complex (e.g. DMAB) or a (b) oxygen atom-containing compound (e.g. MAO), and optionally a (C) alkyl group-containing metallic compound (e.g. TIBA). By virtue of using the above styrenic monomer, the process enables to minimize the amount of the residual metals in the resultant styrenic polymer without deterioration of the catalytic activity, simplify the process and thereby curtail the production cost of SPS.

REFERENCES:
patent: 5066741 (1991-11-01), Campbell, Jr.
patent: 5142005 (1992-08-01), Albizzati et al.
patent: 5183853 (1993-02-01), Guerra et al.
Pellecchia et al, Novel Aluminoxane-free catalysts for syndio-specific polymerization of styrene, Macromol. Chem., Rapid Commun., 13, 265-268 (1992).

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