| 摘要 |
PURPOSE:To obtain the titled resin low in an impurity content, by reacting an aromatic polyhalogen compound with an alkali metal sulfide in the presence of a polymerization promotor in a specified amount of an amide polar solvent, subjecting the reaction mixture to hot solid/liquid separation and washing the product. CONSTITUTION:1mol of an aromatic polyhalogen compound (e.g., p- dichlorobenzene) is dissolved in at most 400g of an amide polar solvent (e.g., N-methylbyrrolidone) and reacted with an alkali metal sulfide, both of hydrogen sulfide and an alkali metal-containing base or both of an alkali metal hydrosulfide and an alkali metal-containing base. After the completion of the reaction, the polymerization solution is subjected to hot solid/liquid separation and a temperature of 50 deg.C to the b.p. of the solvent, and the separated solid matter is washed with the same solvent as above heated to a temperature of 50 deg.C to the b.p. to remove adhering mother liquor. In this way, a polyphenylene sulfide resin of a cyclic oligomer content <=1.5wt% (as measured by a methylene chloride extraction method) is obtained.
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