| 摘要 |
A cross-linkable dielectric impregnation compsn, contains: (a) a polydienic polyol; (b) a polyisocyanate with functionality of at least 2; and (c) an inert liq. filler in amt.: (i) to give viscosity 50 mPa.s at the temp. of impregnation for at least 1 day; and (ii) to obtain a tangent delta (tan delta ), at 20 degrees C and 50 Hz, after complete cross-linking, of below 0.02. |
