| 摘要 |
PURPOSE:To obtain the subject polymer excellent in molding properties at a low cost without using an expensive assistant by reacting an aromatic dihalogen compound with an alkali metal sulfide in an organic amide solvent in the presence of an aromatic polyhalogen compound under condensation- refluxing of a gaseous phase without using an expensive assistant. CONSTITUTION:This polyarylene sulfide having a high molecular weight and excellent for melt spinnability, blow moldability and extrusion moldability is obtained at a low cost by the use of low pressure reaction vessel without using an expensive assistant requiring high cost for separating and recovering from a product by reacting an alkali metal sulfide (e.g. sodium sulfide) with an aromatic dihalogen compound (e.g. p-dichlorobenzene) in an aromatic amide solvent (e.g. N-methyl-2-pyrrolidone) in the presence of an aromatic polyhalogen compound (e.g. 1,3,5-trichlorobenzene) in an amount of 0.005-1.5mol% based on the alkali metal sulfide under pressure at 260 deg.C and allowing to reflux a portion of gaseous phase in a reaction vessel as the liq. phase by cooling a vapor-holding part of the reaction vessel to condense the portion of the gaseous phase. |
