Dispersant Mannich base compositions
US4178259A · kind A · utility
12Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1978 |
| Grant date | Dec 11, 1979 |
| Priority date | — |
| Expiry date | May 1, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New Mannich bases and their alkaline earth metal salts are prepared by condensing formaldehyde and a polyamine with a sulfur-containing phenolic mixture consisting of (1) from 5 to 40% of a sulfurized alkylphenol; and (2) from 95 to 60% of phenol alkylated with polyisobutene of 16 to 128 carbon atoms or a mixture of said phenol alkylated with polyisobutene and phenol alkylated with a propylene tetramer. They are useful as additives for lubricating oils, particularly for use in marine cylinder lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.