MAGNETOOPTICAL RECORDING MEDIA

摘要

Optical recording media disclosed herein are excellent in adhesion between the substrate and the enhancement film, as well as in oxidation resistance and long term-stability of magnetooptical recording characteristics. The substrate contains a composition of a random copolymer of ethylene and a cycloolefin and having the formula: ... ¢I! (wherein n is 0 or a positive integer and R1-R12 are each hydrogen, halogen or hydrocarbon or two of R9-R12 together form a ring or R9 and R10 or R11 and R12 together form alkylidene). The composition comprises the random copolymer ¢A! having an intrinsic viscosity of 0.05 to 10 dl/g and a softening temperature of at least 70.degree.C and the random copolymer ¢B! having an intrinsic viscosity of 0.05 to 5 dl/g and a softening temperature of less than 70.degree.C at a random copolymer ¢A!/random copolymer ¢B! weight ratio of from 100/0.1 to 100/10.