| 摘要 |
The disclosed bonding pitch for electrodes, having a softening point C.I.A. comprised between 80 DEG C. and 150 DEG C., a concentration of quinoline-insoluble substances higher or equal to 4% by weight, a concentration of alpha + beta resins comprised between 28 and 40% by weight, and a fixed carbon content determined according to the standard ISO 6998, at least equal to 51% by weight, is characterized by a vitreous transition domain DELTA Tg, determined by differential calorimetric analysis, at the most equal to 50 DEG C. In order to produce such a pitch, a pitch having a content of quinoline-insoluble substances lower than 4% by weight is subjected to a treatment by waves having a frequency between 0.9 and 300 GHz. Such treatment makes possible the increase of the carbon content of the pitch while preserving a good affinity to the coke and significantly decreasing its vitreous transitional domain. |
