Mannich base composition
US4157309A · kind A · utility
22Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1977 |
| Grant date | Jun 5, 1979 |
| Priority date | — |
| Expiry date | Sep 30, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New Mannich bases and the alkaline earth metal salts thereof are prepared by condensing formaldehyde and a polyamine with a sulfur-containing phenolic mixture consisting of (1) from 5 to 35 mol percent of a sulfurized alkylphenol of the formula ##STR1## wherein R is C.sub.8 -C.sub.36 alkyl, n is an integer from 1 to 8, and y is an integer from 1 to 9, and (2) from 95 to 65 mol percent of phenol alkylated with a propylene tetramer. They are useful as highly alkaline additives for lubricating oils, particularly for use in marine cylinder, railroad, and automotive diesel lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.