Novel polyureas and their use as grease thickening agents
US4261845A · kind A · utility
12Cited by
13References
8Claims
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Key dates
| Filing date | Jan 18, 1980 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Jan 18, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2229/05
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel polyureas of the formula: ##STR1## wherein n is 9 to 18, m is 2 to 10, X and Y are each either ethyl, methyl or a hydrogen atom and R=aromatic, aliphatic or cycloaliphatic, are described herein. These polyureas are particularly useful as thickening agents for lubricating oils to make greases. The polyureas may be prepared by reacting the aminated products of propoxylated fatty alcohols with organic polyisocyanates. The reaction is a simple process requiring no heat. Very low levels of the resulting polyureas are required to thicken oils of lubricating viscosity into greases which have good high temperature stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.