Back to results
US 4,454,059 AGranted
Nitrogenous dispersants, lubricants and concentrates containing said nitrogenous dispersants
AssigneeThe Lubrizol Corporation
InventorsJohn F. Pindar, Jerome M. Cohen, Charles P. Bryant
Life of this patent
Estimating the term…
Abstract
Compositions useful as lubricant and fuel dispersants are prepared by reacting an intermediate (A) of the formulae ##STR1## wherein each R is hydrogen or a lower hydrocarbon-based group, Ar is an aromatic moiety having at least one aliphatic substituent of at least 6 carbon atoms and x is 1 to about 10, with an amino compound (B) which contains one or more amino groups having hydrogen bonded directly to an amino nitrogen.
Claims15
A composition made by the method comprising
- 1. reacting at least one phenol compound containing at least one aliphatic or alicyclic substituent of at least about six carbon atoms with at least one aldehyde or precursor thereof in the presence of an alkaline reagent, at a temperature up to about 125.degree. C.;
- then
- 2. substantially neutralizing the intermediate thus formed at a temperature up to about 150.degree. C;
- and then
- 3. reacting the neutralized intermediate with at least one amino compound which contains one or more amino groups having hydrogen directly bonded to amino nitrogen.
2 more elements
Dependencies are inferred from the claim text.