Patent ID: 6399711
Filing Date: 2002-06-04
Classification: C08F,C08L

Abstract:
A process for producing a rubber reinforced styrene-based resin which comprises the following steps:a step of prepolymerizing a styrene-based monomer stock solution containing from 2 to 15% by weight of a rubbery polymer; a step of feeding a prepolymer liquid prepolymerized in the above step into a circulating reactor via a mixing means; a step of polymerizing the prepolymer liquid fed into the circulating reactor to obtain a polymer liquid; a step of circulating a portion of the polymer liquid from the circulating reactor back into the mixing means at a flow amount of from about 0.5 to 3 times the flow amount of the prepolymer liquid fed into the mixing means, and substantially uniformly mixing the prepolymer liquid and the polymer liquid; and a step of further polymerizing the polymer liquid polymerized in the circulating reactor, in a plug-flow type reactor.