METHOD FOR PRODUCING METHACRYLIC RESIN CAST PLATE,申请号JP20050379953-传众专利搜索

METHOD FOR PRODUCING METHACRYLIC RESIN CAST PLATE

申请公布号：JP2007177170(A)

申请号：JP20050379953

申请日期：2005.12.28

申请公布日期：2007.07.12

申请人：

MITSUBISHI RAYON CO LTD

发明人：MATSUO MITSUHIRO;HATANO WATARU

分类号：C08F265/06;C08F2/00;C08F2/01

主分类号：C08F265/06

摘要：PROBLEM TO BE SOLVED: To provide a method for producing a methacrylic resin cast plate which is reduced in the foaming during polymerization. SOLUTION: The method for producing a methacrylic resin cast plate comprises performing cast polymerization of a syrup that is produced through partial polymerization of a raw material mainly comprised of a methacrylic monomer or a monomer mixture in the presence of a radical polymerization initiator, wherein the methacrylic monomer is a methylmethacrylate alone, the monomer mixture contains 60% by mass or more of the methylmethacrylate, the methylmethacrylate may be a methylmethacrylate prepared by an ACH method, a nitrogen compound with a specific molecular weight contained in the methylmethacrylate is 10 ppm or less, and cast polymerization is performed using a syrup that is produced through partial polymerization of a methacrylic monomer or a methacrylic monomer mixture with a dissolved oxygen concentration of 2 ppm or less in the presence of a radical polymerization initiator in a manner so that the polymer content is within a specific range. COPYRIGHT: (C)2007,JPO&INPIT