| 摘要 |
The new sulphur-containing polyether-urethanes are prepared by a polyaddition reaction of aromatic, cycloaliphatic and/or aliphatic polyisocyanates with (a) at least one aliphatic dialcohol containing a sulphur bridge, of the formula <IMAGE> in which R1 to R8 are identical or different and denote hydrogen or an alkyl radical with 1 to 10 carbon atoms and x denotes the average number of sulphur atoms in the range from 1.5 to 4, if appropriate in the presence of (b) a polyethylene glycol and/or (c) a dialcohol which carries at least one anionic group and/or at least one diamine which carries an anionic group, and, if appropriate, (d) other cycloaliphatic, araliphatic or heterocyclic dialcohols and/or aromatic, cycloaliphatic or aliphatic diamines. The compounds can be used as anti-wear agents in aqueous hydraulic fluids and cooling lubricant concentrates. |
