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1. (WO2016104701) PROCESS FOR PRODUCING (METH)ACRYLIC RESIN COMPOSITION

Pub. No.:    WO/2016/104701    International Application No.:    PCT/JP2015/086224
Publication Date: Fri Jul 01 01:59:59 CEST 2016 International Filing Date: Sat Dec 26 00:59:59 CET 2015
IPC: C08F 20/18
C08F 6/26
Applicants: KURARAY CO., LTD.
株式会社クラレ
Inventors: OZAWA, Hiroshi
小澤 宙
KITADE, Yasuhito
北出 康仁
TANAKA, Shouji
田中 正二
Title: PROCESS FOR PRODUCING (METH)ACRYLIC RESIN COMPOSITION
Abstract:
A process for producing a (meth)acrylic resin composition, the process comprising: continuously feeding, to a vessel type reactor, polymerizable monomers comprising 50-100 mass% methyl methacrylate, 0-20 mass% alkyl acrylate, and 0-30 mass% other monomer(s), a chain-transfer agent, and a free-radical polymerization initiator; polymerizing the polymerizable monomers by bulk polymerization to a conversion into polymer of 40-70 mass%, thereby obtaining a liquid containing a (meth)acrylic resin; continuously feeding the obtained liquid to a vented extruder to separate the liquid into volatile matter and the (meth)acrylic resin; continuously feeding the separated volatile matter to a distillation column to obtain a fraction containing methyl methacrylate; adding a polymerization inhibitor to the fraction; and reusing the fraction to which the polymerization inhibitor has been added, in the polymerizable monomers.