| 摘要 |
<p>PURPOSE:To prepare the titled resin having excellent thermal stability and processability, by copolymerizing styrene, acrylonitrile, methyl methacrylate, etc. in the presence of a polybutadiene latex subjected to the particle growing treatment with a specific acid group-containing copolymer latex. CONSTITUTION:The objective resin can be obtained by polymerizing 93- 30pts.wt. of (A) a monomer mixture consisting of >=30% styrene, acrylonitrile, and/or methyl methacrylate and <=30% other monomer in the presence of (B) 7- 70pts.wt. of a grown rubber latex having a particle diameter of >=0.2mu and obtained by polymerizing (i) a monomer mixture consisting of 3-30% acrylic acid, itaconic acid and/or crotonic acid, 97-35% 1-12C alkyl acrylate and 0- 48% other monomer to (ii) 100pts.wt. of a rubber latex having a pH of >=7 and composed of 100-50% 1,3-butadiene and 0-50% monomer containing the group of formula (e.g. styrene). The polymerization of the component (i) is carried out first by polymerizing 5-90% of the monomer excepting the unsaturated acid, and then polymerizing the remaining 95-10% of the monomer.</p> |
