| 摘要 |
PURPOSE:To obtain the title compound having a high melt viscosity, excellent heat stability and low coloration, by polymerizing a heated and dehydrated mixture of a hydration water-containing alkali metal sulfide with an alkali metal hydrosulfide with a dihaloaromatic compound. CONSTITUTION:A hydration water-containing alkali metal sulfide (A) (e.g., sodium sulfide) is mixed with an alkali metal hydrosulfide (B) (e.g., sodium hydrosulfide) in an organic polar solvent (e.g., N-methylpyrrolidone) at a molar ratio of 1:0.005-0.05, and this mixture is heated to 180-230 deg.C and dehydrated until the molar ratio of the alkali metal sulfide to the water is 1:0.5-2.0, and polymerized with 0.9-1.1mol., per mol. of the alkali metal sulfide (C), of a dihaloaromatic compound (e.g., p-dichlorobenzene) at 180-300 deg.C for 0.5-20hr.
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