Preparation of polystyrene by continuous anionic polymerization

Details Preparation of polystyrene by continuous anionic polymerization Preparation of polystyrene by continuous anionic polymerization

1997-05-06

1999-05-11

Teskin, Fred

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

Synthetic resins

Polymerizing in tubular or loop reactor

526 65, 526 88, 526173, 526346, C08F12/08;2/06

Patent

active

059028653

ABSTRACT:
In a process for preparing polystyrene by continuous anionic polymerization of styrene monomer by means of a catalyst based on a metal alkyl preferably in the presence of a solvent at a temperature in the range from 30 to 70.degree. C., the styrene monomer is fed to an essentially isothermally operated circulation reactor configured as a closed tube loop which has, for example, a specific cooling area of at least 50 m.sup.2 per m.sup.3 of reactor volume, with the circulation velocity of the reaction mixture and the residence time being set such that the monomer conversion reaches at least 50% and the polymerization is completed in an essentially backmixing-free tube reactor.

REFERENCES:
patent: 3035033 (1962-05-01), Kenmore et al.
patent: 4200713 (1980-04-01), Wingler et al.
patent: 4209599 (1980-06-01), Brady et al.
patent: 4442273 (1984-04-01), Neiditch et al.
patent: 5194525 (1993-03-01), Miura et al.

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