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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Application filed by Sumitomo Chemical Co LtdfiledCriticalSumitomo Chemical Co Ltd
Priority to JP185379ApriorityCriticalpatent/JPS5594935A/en
Publication of JPS5594935ApublicationCriticalpatent/JPS5594935A/en
Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds
(AREA)
Abstract
PURPOSE: To enable the semi-continuous production without an opened system by a mechanism wherein, in obtaining a condensate polymer by a high-viscosity bulk polycondensation reaction, a process from a monomer reaction to a high polymer formation is divided into three stages and these stages are rationally combined.
CONSTITUTION: A monomer easily subjected to condensation reaction is synthesized in a first stage reaction tank and generated by-products and/or solvent are removed Moreover, oligomer is optionally formed from this monomer. Still more, the viscosity of a reaction product in a first stage reaction tank must be below 5000 poises. Subsequently, this reaction product is transferred to a second stage reaction tank and a solid multidispersed prepolymer is formed by applying shearing force at a temperature below a fusing point of a prepolymer with desired MW. This prepolymer is pelletized by an extruder and, in a third reaction tank, obtained pellets are polymerized to produce a bulk polycondensate. As a monomer to be used herein, a difunctional monmer alone or a combination thereof can be used.
COPYRIGHT: (C)1980,JPO&Japio
JP185379A1979-01-091979-01-09Preparation of high-viscosity bulk polycondensate
PendingJPS5594935A
(en)
Process for producing a polymer or copolymer from a monomeric material consisting of an acrylate, a methacrylate or a mixture of such monomers, resin made by the same, process for mass polymerization for preparation of poly (butyl acrylate 2-acrylate) -ethylhexyl), solvent-free resin, mass polymerization process for preparing substantially solvent-free poly (butyl acrylate 2-ethyl hexyl acrylate), poly (butyl acrylate 2-ethyl acrylate) -hexyl) solvent free, a process comprising a step for covering manufacturing articles with a resin composition, manufacturing articles, solvent-free polymerized reaction product, mass polymerization process for substantially solvent-free polymer or copolymer preparation, and, product made by the same