| 摘要 |
PROBLEM TO BE SOLVED: To provide a copolymer having excellent heat resistance, transparency and hardening reactivity, and ozone degradability, and suitable for an optical material.SOLUTION: The above problem is dissolved by an ozone degradable copolymer of maleic anhydride, maleimide or a derivative thereof and a vinyl compound represented by the following general formula, where Rrepresents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a phenyl group which may be substituted, Rrepresents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group which may be substituted, Rrepresents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a phenyl group which may be substituted, Rrepresents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 9 carbon atoms or an alkadienyl group having 4 to 9 carbon atoms, Rand R, together with a carbon atom to which they bind, may constitute a cycloalkenyl group having 3 to 14 carbon atoms or a bicycloalkyl group having 5 to 10 carbon atoms, however excluding the case where all of R, Rand Rare hydrogen atom and Ris a vinyl group or an isopropenyl group. |
