| 摘要 |
PURPOSE:To prepare a composition having excellent optical properties and impact resistance as well as remarkably reduced moisture absorption, by compounding a copolymer composed of methyl methacrylate and cyclohexyl methacrylate with an impact-resistant acrylic resin. CONSTITUTION:The objective composition is prepared by compounding (A) 70- 98pts.wt., preferably 80-95pts.wt. of a copolymer composed of (a) 50-85wt% (in terms of monomer) methyl methacrylate, (b) 15-50wt% cyclohexyl methacrylate and (c) 0-10% other vinyl monomer copolymerizable therewith with (B) 2-30pts.wt., preferably 5-20pts.wt. of an impact-resistant acrylic resin containing a crosslinked acrylic acid ester polymer as the rubber component. The heat decomposition resistance of the composition can be improved by using a vinyl compound, preferably a compound containing 0.2-10% alkyl acrylate having 1-8C alkyl, as a component of the component (A). |
