| 摘要 |
PURPOSE:To obtain the titled composition of high heat distortion temperature with no discoloration, easy to process, suitable as a packaging material, by polymerization of a monomer mixture of specified composition containing an unsaturated nitrile monomer in the presence of a conjugated diene rubbery polymer. CONSTITUTION:The objective composition can be obtained by polymerization, in the presence of (A) 1-30pts.wt. of a conjugated diene rubbery polymer, of 100pts.wt. of a monomer mixture made up of (B) 60-90wt.% of an unsaturated nitrile monomer [pref., (meth)acrylonitrile], (C) 20-5wt.% of an acrylic alkyl ester (pref., methyl acrylate) and (D) 10-0wt.% of a 1-4C methacrylic alkyl ester (pref., methyl methacrylate) in an aqueous medium. The conjugated diene monomer constituting the component A is pref. 1,3-butadiene. |
