| abstract |
PURPOSE: To obtain a composition having a high thermal decomposition temperature and improved impact and heat resistance, by incorporating a specific hindered phenolic compound in a mixture of a diene rubber-aromatic vinyl graft copolymer, etc. with α-methylstyrene copolymer. n CONSTITUTION: 0.05W4.0pts.wt. Hindered phenolic compound, e.g. 1,3,5-tris(3', 5'-di-tert-butyl-4-hydroxybenzyl)isocyanurate, having a molecular weight ≥500 is incorporated in 100pts.wt. resin mixture consisting of 10W60pts.wt. graft copolymer obtained by polymerizing 60W20pts.wt. monomeric mixture consisting of 20W 80wt% aromatic vinyl compound, 0W80wt% methyl methacrylate and 0W35wt% acrylonitrile in the presence of 40W80pts.wt. diene rubber-like polymer and 90W 40pts.wt. copolymer obtained by polymerizing a monomeric mixture consisting of 40W80wt% α-methylstyrene, 0W40wt% methyl methacrylate and 5W35wt% acrylonitrile. n COPYRIGHT: (C)1981,JPO&Japio |