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US 4,386,939 AGranted
Reaction products of certain heterocycles with aminophenols
AssigneeThe Lubrizol Corporation
InventorRichard M. Lange
Life of this patent
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Abstract
Aminophenols and analogous aromatic compounds, especially those containing a hydrocarbon-based substituent preferably having about 10 to about 750 aliphatic carbon atoms, react with 3- or 4-membered ring heterocyclic compounds, preferably epoxides, to form compositions useful as dispersants and detergents in lubricants and fuels.
Claims37
A nitrogen-containing composition prepared by reacting, at a temperature from about 25.degree. C. to about 250.degree. C.:
- (A) at least one aromatic compound having the formula ##STR3## wherein:
- Ar is a single-ring or fused-ring aromatic radical;
- R is a substantially saturated non-aromatic hydrocarbon-based radical containing an average of about 10 to about 750 aliphatic carbon atoms;
- and
- each of a, b and c is an integer from 1 to three times the number of aromatic nuclei in Ar;
- with
- (B) at least one 3- or 4-membered ring heterocyclic compound in which the heterocyclic atom is a single oxygen, sulfur or nitrogen atom;
- at least about one-half equivalent of reagent B being used per equivalent of reagent A.
5 more elements
A nitrogen-containing composition having the formula ##STR4## wherein:
- Ar is a single-ring or fused-ring aromatic radical;
- R is a substantially saturated non-aromatic hydrocarbon-based radical containing an average of about 10 to about 750 aliphatic carbon atoms;
- R' is a divalent 1,2- or 1,3-hydrocarbon-based radical;
- X is oxygen, sulfur or NR";
- R" is hydrogen or a hydrocarbon-based radical containing from 1 to about 18 carbon atoms;
- each of a, b and c is an integer from 1 to three times the number of aromatic nuclei in Ar;
- each of d, e and f is an integer from 0 to 10;
- and
- d+e+f is at least 1.
6 more elements
Dependencies are inferred from the claim text.