Preparation and use of sulphur-containing polyether-urethanes
US4666618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Apr 18, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The new sulphur-containing polyether-urethanes are prepared by a polyaddition reaction of aromatic, cycloaliphatic and/or aliphatic polyisocyanates with PA0 (a) at least one aliphatic dialcohol containing a sulphur bridge, of the formula ##STR1## in which R.sup.1 to R.sup.8 are identical or different and denote hydrogen or an alkyl radical with 1 to 10 carbon atoms and PA1 x denotes the average number of sulphur atoms in the range from 1.5 to 4, PA0 if appropriate in the presence of PA0 (b) a polyethylene glycol and/or PA0 (c) a dialcohol which carries at least one anionic group and/or at least one diamine which carries an anionic group, and, if appropriate, PA0 (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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.