| 摘要 |
PROCESS FOR THE PREPARATION OF POLYARYLENE SULFIDE HAVING A LOW ALKALI METAL CONTENT AND PRODUCT THEREOF Polyarylene sulfide having a much reduced content of impurities is prepared by reacting an aromatic polyhalide with an alkali metal sulfide in the presence of a polar organic solvent and subjecting the resulting polyarylene sulfide subsequently to an acid treatment, filtration through a screen having a mesh size of 50-100 .mu., and washing with, successively, the same solvent as used in the preparation of the polymer, water, an organic or inorganic acid, and water. The resulting polyarylene sulfide has a sodium content of less than 20 ppm.
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