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US 11,512,262 B2Granted
Azaphenothiazines and azaphenoxazines as antioxidants
AssigneeUniversity of Ottawa
InventorsDerek Andrew Pratt, Evan Haidasz
Life of this patent
Estimating the term…
Abstract
The present disclosure relates generally to antioxidants. More particularly, the present disclosure relates to lubricating compositions comprising an antioxidant.
Claims21
A lubricant composition useful for engines, comprising:
- an oil of lubricating viscosity, and
- a compound selected from the group consisting of:
- a compound of Formula (I):
- wherein:
- X is CH or N, wherein at least one X is N, and wherein:
- (i) Y is O, and A is either H or an electron donating group;
- wherein said electron donating group is an H atom, a hydrocarbon group, an aryl group, an alkyl group, an alkoxy group, an amine group, a monosubstituted amine, or a disubstituted amine, or
- (ii) Y is S and A is either H or an electron donating group, wherein at least one A is an electron donating group when the ring to which it is attached comprises at least one X that is N;
- and wherein said electron donating group is a hydrocarbon group, an aryl group, an alkyl group, an alkoxy group, an amine group, a monosubstituted amine, or a disubstituted amine;
- a compound of Formula (II)
- a compound of Formula (IV)
- a compound of Formula (VI):
- a compound of Formula (VII):
- a compound of Formula (VIII):
- a compound of Formula (IX):
- a compound of Formula (X):
- and
- a compound of Formula (XI):
15 more elements
A method of forming a lubricant composition useful for engines, comprising combining an oil of lubricating viscosity with a compound selected from the group consisting of:
- a compound of Formula (I):
- wherein:
- X is CH or N, wherein at least one X is N, and wherein:
- (i) Y is O, and A is either H or an electron donating group;
- wherein said electron donating group is an H atom, a hydrocarbon group, an aryl group, an alkyl group, an alkoxy group, an amine group, a monosubstituted amine, or a disubstituted amine, or
- (ii) Y is S and A is either H or an electron donating group, wherein at least one A is an electron donating group when the ring to which it is attached comprises at least one X that is N;
- and wherein said electron donating group is a hydrocarbon group, an aryl group, an alkyl group, an alkoxy group, an amine group, a monosubstituted amine, or a disubstituted amine;
- a compound of Formula (II)
- a compound of Formula (IV)
- a compound of Formula (VI):
- a compound of Formula (VII):
- a compound of Formula (VIII):
- a compound of Formula (IX):
- a compound of Formula (X):
- and
- a compound of Formula (XI):
13 more elements
A method of lubricating a combustion engine comprising applying a lubricant composition comprising an oil of lubricating viscosity and a compound selected from the group consisting of:
- a compound of Formula (I):
- wherein:
- X is CH or N, wherein at least one X is N, and wherein:
- (i) Y is O, and A is either H or an electron donating group;
- wherein said electron donating group is an H atom, a hydrocarbon group, an aryl group, an alkyl group, an alkoxy group, an amine group, a monosubstituted amine, or a disubstituted amine, or
- (ii) Y is S and A is either H or an electron donating group, wherein at least one A is an electron donating group when the ring to which it is attached comprises at least one X that is N;
- and wherein said electron donating group is a hydrocarbon group, an aryl group, an alkyl group, an alkoxy group, an amine group, a monosubstituted amine, or a disubstituted amine;
- a compound of Formula (II)
- a compound of Formula (IV)
- a compound of Formula (VI):
- a compound of Formula (VII):
- a compound of Formula (VIII):
- a compound of Formula (IX):
- a compound of Formula (X):
- and
- a compound of Formula (XI):
13 more elements
Dependencies are inferred from the claim text.