Back to results
US 4,231,757 AGranted
Nitro phenol-amine condensates, methods of making same, fuels and additive concentrates containing them
AssigneeThe Lubrizol Corporation
InventorKirk E. Davis
Life of this patent
Estimating the term…
Abstract
Nitrogen-containing compositions made by condensing a nitro phenol with an organic amino compound having at least one hydrogen atom directly bonded to a nitrogen or oxygen atom are useful as additives for lubricants and fuels. A specific embodiment comprises compositions made by reacting nitro phenols having hydrocarbyl substituents of up to 750 aliphatic carbon atoms with alkylene polyamines.
Claims45
A nitrogen-containing composition substantially free of nitro groups made by condensing:
- (A) at least one nitro phenol represented by the formula ##STR20## wherein R is a substantially saturated, substantially hydrocarbyl, nonaromatic substituent bonded to an aromatic ring carbon of Ar through a direct carbon bond;
- a is zero or an integer of 1 up to three times A where A is the number of aromatic nuclei present in Ar;
- b and c are each independently integers of 1 up to three times A with the proviso that the sum a+b+c does not exceed the unsatisifed valences of Ar;
- and Ar is an aromatic moiety having 0 to 3 optional substituents, Opt, selected from the group consisting of halogen, --L, --OL, --CN, --NH.sub.2, --NHL, --NL.sub.2, --C(O)OL where L is a lower alkyl group of 1 to 7 carbon atoms and combinations of two or more of said optional substituents with
- (B) at least one amine having at least one hydrogen atom directly bonded to a nitrogen atom or an oxygen atom.
2 more elements
A method of preparing a nitrogen-containing composition substantially free of nitro groups which comprises the step of condensing:
- (A) at least one nitro phenol represented by the formula ##STR28## wherein R is a substantially saturated, substantially hydrocarbyl, nonaromatic substituent boned to an aromatic ring carbon of Ar through a direct carbon bond;
- a is zero or an integer of 1 up to three times A where A is the number of aromatic nuclei present in Ar;
- b and c are each independently integers of 1 up to three times A with the proviso that the sum a+b+c does not exceed the unsatisified valences of Ar;
- and Ar is an aromatic moiety having 0 to 3 optional substituents, Opt, selected from the group consisting of halogen, --L, --OL, --CN, --NH.sub.2, --NHL, --NL.sub.2, --C(O)OL where L is a lower alkyl group of 1 to 7 carbon atoms and combinations of two or more of said optional substituents with
- (B) at least one amino compound having at least one hydrogen atom directly bonded to a nitrogen atom or an oxygen atom.
2 more elements
Dependencies are inferred from the claim text.