Cyclic ether copolymer, coating resin composition, optical devices, and process for production of the devices

Abstract

This invention provides a cyclic ether copolymer such as a cyclic ether copolymer excellent in solubility in solvents and easy to form uniform thin films therefrom. The present invention relates to a cyclic ether copolymer obtained from a 1,3-dioxole ring structure-containing compound represented by the following general formula (I) and an ethylenically unsaturated monomer: (wherein R1 and R2 are the same or different and each represents F, H, Cl or a perfluoroalkyl group containing 1 to 5 carbon atoms and X1 and X2 are the same or different and each represents F, H, Cl or —OR3, and R3 represents a perfluoroalkyl group containing 1 to 5 carbon atoms, provided that at least one of R1 and R2 is F or a perfluoroalkyl group containing 1 to 5 carbon atoms), which compolymer has a glass transition point of 100 to 135° C. and an intrinsic viscosity of 0.01 to 0.4 dl/g as determined at 35° C. in perfluoro-2-butyltetrahydrofuran.

Dependencies are inferred from the claim text.