| 摘要 |
PURPOSE:To produce a resin having excellent mechanical strength such as impact resistance, etc., readily, by preliminarily polymerizing a solution consisting of a styrenic monomer and a rubber-like polymer by a perfect blend type reactor and carrying out phase inversion by a blender. CONSTITUTION:A raw material solution comprising a styrenic monomer (e.g. styrene, etc.) and a rubber-like polymer (e.g. polybutadiene, polyisoprene, etc.) as main components is continuously fed to a perfect blend type reactor, preliminarly polymerization is carried out by the reactor in a range (preferably 3-20%) not to exceed polymerization conversion ratio wherein the rubber-like polymer in the raw material solution is granulated. The prepared polymer solution is fed to a blender, mixed with a circulating polymerization solution having 30-80% polymerization conversion ratio of the styrenic monomer to granulate the rubber-like polymer. Then polymer solution is continuously fed to a plug flow type reactor and polymerization is continued. EFFECT:Phase inversion can be carried out in a short time and the reaction solution during phase inversion can be kept in an excellent blended state without reducing particle diameters of rubber particles.
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