| 摘要 |
PURPOSE:To develop an impermeable carbon material which has a high carbonization rate and is small in shrinkage at the time of carbonization by subjecting a thermally cured molding consisting of a thermosetting intermediate product which is obtd. by a reaction of a mixture composed of a condensed polycyclic arom. compd., arom. crosslinking agent and acid catalyst and a specific aggregate to thermal curing and molding, then carbonizing the molding. CONSTITUTION:The mixture composed of the condensed polycyclic arom. compd. which is a deriv. consisting of naphthalene, etc., as main skeleton, heavy gravity oils of coal and petroleum, tar, etc., and the oxide, sulfide, halide, etc. of said materials, the arom. crosslinking agent consisting of 1 or >=2 arom. rings contg. a hydroxyl methyl group, etc., and the acid catalyst such as aluminum chloride or phosphoric acid or the thermosetting intermediate product obtd. by the thermal reaction of such mixture is compounded with the aggregate such as fibers and granular particles of carbon or graphite. Such mixture is heated to 100-400 deg.C in an oxidative or nonoxidative atmosphere and is plasticized. The mixture is thereafter thermally cured and molded to the prescribed shape and is heated in succession to carbonize and further to graphitize the same. The impermeable carbon material which has high carbonization rate, is small in shrinkage at the time of carbonization and has intricate shape is thus produced. |
