| 摘要 |
PURPOSE:To provide the title polymer composed of a group of recurring units having specific ring structure, having a molecular weight corresponding to a specific intrinsic viscosity, easily moldable by press molding, having excellent thermal stability and high transmittance of ultraviolet ray and infrared ray and useful for lens, etc. CONSTITUTION:The objective polymer is composed essentially of a group of recurring units (A) having a ring structure exposed by formula I and/or formula II (n is 1 or 2) and having an intrinsic viscosity of >=0.1. Preferably, the component A is derived from perfluoroallyl vinyl ether and/or perfluorobutenyl vinyl ether and the polymer is composed essentially of the component A and (B) a group of recurring units expressed by -(CF2-CFX)-(X is F, Cl, O-CF2CF2CF3, etc.). |
