申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP1026183A1
公开(公告)日:2000-08-09
A styrene resin composition excellent in luster, rigidity and surface impact strength is provided. A mixed solution of (b1) a homopolymer of a diene monomer or (b2) a copolymer of a styrene monomer and a diene monomer, the copolymer having 15% or less on a weight basis of the styrene structure units, (b3) a copolymer of a styrene monomer and a diene monomer, the copolymer having 20 to 50% on a weight basis of the styrene structure units, (a1) a styrene monomer, and (a2) a (meth)acrylic acid alkyl ester is continuously bulk polymerized in a continuous bulk polymerization line having incorporated therein a tubular reactor with a plurality of mixing elements that have no mobile part fixed inside thereof.
本发明提供了一种在光泽、硬度和表面冲击强度方面都非常出色的苯乙烯树脂组合物。(b1)二烯单体的均聚物或(b2)苯乙烯单体和二烯单体的共聚物(共聚物中苯乙烯结构单元的重量比为 15%或以下)、(b3)苯乙烯单体和二烯单体的共聚物(共聚物中苯乙烯结构单元的重量比为 20%至 50%)的混合溶液、(a1) 苯乙烯单体和 (a2) (甲基)丙烯酸烷基酯在连续大体积聚合生产线中进行连续大体积聚合,该连续大体积聚合生产线包含一个管状反应器,该反应器具有多个混合元件,其内部没有固定的移动部件。