| 摘要 |
<p>1353509 Polyether thioethers BAYER AG 2 Sept 1971 [4 Sept 1970] 41008/71 Heading C2C A condensation product is prepared by reacting together thiodiglycol, an aliphatic alcohol with 6 to 10 carbon atoms and a polyethylene glycol-mono-alkyl (C 3 -C 5 ) ether, which has an average molecular weight in the range of from 200 to 400, in a molar ratio of thiodiglycol : alcohol : ether of 1 : 0À5-2 : 0À1-0À5 at a temperature in the range of from 140‹ C. to 200‹ C. and in the presence of a catalyst comprising phosphorous acid and an organic sulphonate of a divalent metal from the Groups IIA, IIB or VIII of the Periodic System, and removing the water formed.</p> |
