发明名称 |
Process for production of polyarylene sulfides. |
摘要 |
<p>In a process for preparing a polyarylene sulfide by reacting an alkali metal sulfide and at least one dihaloaromatic compound in an organic amide solvent at an elevated temperature: a highly pure anhydrous alkali metal sulfide reactant having a purity of at least 95% by weight and a content of alkali metal hydrosulfide impurity of not greater than 2% by weight is employed. The water is deliberately added in a proportion of 0.1 to 0.8 moles per each mole of the alkali metal sulfide used in the process. The alkali metal sulfide reactant is charged in a concentration of 2.5 to 5 moles per liter of the reaction mixture. The deliberate addition of water enables one to omit a dehydration stage which has been desirably or rather necessarily effected to obtain a satisfactory polymer product where a hydrous alkali metal sulfide reactant is employed. The improved process of the invention provides a highly pure polyarylene sulfide product having a relatively increased molecular weight and a decreased content of by-product oligomers.</p> |
申请公布号 |
EP0480685(A2) |
申请公布日期 |
1992.04.15 |
申请号 |
EP19910309230 |
申请日期 |
1991.10.08 |
申请人 |
TOSOH CORPORATION |
发明人 |
INOUE, HIROSHI;KATO, TOSHIKAZU |
分类号 |
C08G75/02;C08G75/06 |
主分类号 |
C08G75/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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