Production of styrene resins by continuous bulk polymerization

Details Production of styrene resins by continuous bulk polymerization Production of styrene resins by continuous bulk polymerization

1988-09-09

1990-08-14

Schofer, Joseph L.

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

Synthetic resins

Polymerizing in tubular or loop reactor

526 65, 526 67, 526 68, 526 88, 526227, 526228, 526232, 5262323, 5262325, 526346, 526918, C08F 202, C08F 432

Patent

active

049488473

ABSTRACT:
A process for producing a styrene resin by continuous bulk polymerization using a polymerization apparatus comprising a circulating line (I) for initial-stage polymerization including at least one tubular reactor having fixedly set therein a plurality of mixing elements having no moving parts and a main-polymerization line (II) following the circulating line (I) and including at least one tubular reactor having fixedly set therein a plurality of mixing elements having no moving parts; characterized in that while a polmerization solution containing a styrene monomer (A), an organic solvent (B) and an organic peroxide (C) whose half life reaches 10 hours at a temperature of 75.degree. to 130.degree. C. is polymerized in the initial stage while it is circulated through the circulating line (I), and at the same time, a minor part or a major part of the initial-stage polymerization solution is introduced continuously into the main-polymerization line (II) and polymerized.

REFERENCES:
patent: 4209599 (1980-06-01), Brady et al.
patent: 4376847 (1983-03-01), Matsubara et al.
Abstract of Japanese Patent Publication No. 610/1972.
Abstract of Japanese Laid-Open Patent Publication No. 173107/1983.
Abstract of Japanese Laid-Open Patent Publication No. 1515/1984.
Polymer Processes, C. E. Schildknecht (ed.), Interscience, N.Y., 31 (1956).

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