C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/578
C08F 12/08 (2006.01) B01F 5/00 (2006.01) B01F 5/10 (2006.01) B01J 19/24 (2006.01) B29B 7/32 (2006.01) B29B 7/74 (2006.01)
Patent
CA 1308854
Abstract of the Disclosure 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 includ- ing at least one tubular reactor having fixedly set therein a plurality of mixing elements having no moving parts; characterized in that while a polymerization 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 to 130 °C is polymerized in the intitial 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 polymeri- zation solution is introduced continuously into the main-polymerization line (II) and polymerized.
576519
Morita Tsuyoshi
Shimazu Kyotaro
Dainippon Ink And Chemicals Inc.
Smart & Biggar
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