| abstract |
Electrical devices, e.g. molded circuit boards, connectors and capacitors, fabricated from electrical insulating component, comprising norbornene dicarboximide thermoplastic polymer exhibiting a glass transition temperature greater than about 200 DEG C., moisture absorption after equilibrating in boiling water of less than about 3 weight percent and an electrical permittivity at 1000 hertz measured at 25 DEG C. and 50 percent relative humidity of less than 2.8. Preferred polymers comprise N-methyl norbornene dicarboximide, N-ethyl norbornene dicarboximide, N-propyl norbornene dicarboximide, N-butyl norbornene dicarboximide, N-trifluoroethyl norbornene dicarboximide, N-phenyl norbornene dicarboximide, N-trifluoromethylphenyl norbornene dicarboximide, N-cyclohexyl norbornene dicarboximide, N-cycloheptyl norbornene dicarboximide, N-cyclooctyl norbornene dicarboximide. |