abstract |
PURPOSE: The titled copolymer excellent in heat resistance, chemical resistance, solvent resistance, dielectric characteristics, rigidity, etc., prepared by adding a specified third component and/or a specified fourth component monomer to a two-component mixture comprising a specified polycyclic monomer component and ethylene and polymerizing the resulting monomer mixture. n CONSTITUTION: A random multicomponent copolymer comprising a 1,4,5,8- dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene (DMON) of formula I (wherein R 1 and R 2 are each H, an alkyl or a halogen), ethylene, a 3C or higher α-olefin and/or a cycloolefin, wherein the ethylene/DMON molar ratio is 95/5W5/95, the molar ratio of the total of the C 3 or higher α-olefin and/or the cycloolefin to DMON is 95/5W20/80, the DMON unit chiefly has a structure of formula II, and the intrinsic viscosity η as measured in decalin at 135°C is 0.005W20dl/g. n COPYRIGHT: (C)1986,JPO&Japio |