US2018057767A1PendingUtilityA1
Lubricant composition
Est. expiryAug 25, 2036(~10.1 yrs left)· nominal 20-yr term from priority
C10M 141/08C10N 2030/06C10M 141/06C10M 2207/284C10M 2215/26C10N 2040/252C10N 2040/26C10N 2030/12C10N 2030/10C10M 2207/026C10N 2040/255C10M 2215/221C10M 133/12C10M 2207/289C10M 2219/082C10M 2203/1025C10M 2215/064C10M 133/40C23F 1/16C10M 129/76C10N 2240/102C10N 2240/104C10N 2240/105C10N 2230/10
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Claims
Abstract
A lubricant composition has an increased oxidation induction time. The lubricant composition includes a base oil present in an amount of greater than 85 parts by weight per 100 parts by weight of the lubricant composition. The lubricant composition also includes an antioxidant component including particular first, second, and third antioxidants.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A lubricant composition having an increased oxidation induction time determined according to ASTM D6186 and comprising:
a base oil present in an amount of greater than 85 parts by weight per 100 parts by weight of said lubricant composition; and an antioxidant component comprising;
a first antioxidant having the structure,
wherein R is a straight or branched alkyl group having 7 to 17 carbon atoms, and wherein n is from 6 to 18,
a second antioxidant having the structure:
wherein each of A, D, E and G is carbon or nitrogen and wherein R 2 and R 3 are each independently chosen from hydrogen, alkyl, N-(alkyl) 2 , styryl, and α-alkyl styryl groups, provided that at least one of R 2 and R 3 is not hydrogen, and
a third antioxidant having the structure:
wherein m is a number from 1 to 10 and R 4 is hydrogen or an alkyl group having 1 to 12 carbon atoms, and
wherein R 5 is an alkyl group having 1 to 20 carbon atoms and each of R 6 and R 7 is independently —CH 2 —S-alkyl, wherein the alkyl group bonded to the sulfur atom has 1 to 20 carbon atoms.
2 . The lubricant composition of claim 1 wherein said first, second, and third antioxidants are present in a ratio of from 0.1:0.1:0.1 to 3:5:5.
3 . The lubricant composition of claim 1 wherein R is a straight or branched alkyl group of 11 or 17 carbon atoms.
4 . The lubricant composition of claim 1 wherein R is a straight or branched alkyl group of 8 to 14 carbon atoms.
5 . The lubricant composition of claim 1 wherein R is a straight or branched alkyl group of 10 to 14 carbon atoms.
6 . The lubricant composition of claim 1 wherein R is a straight or branched alkyl group of 10 to 12 carbon atoms.
7 . The lubricant composition of claim 1 wherein R is a straight or branched alkyl group of 11 atoms.
8 . The lubricant composition of claim 1 wherein said second antioxidant has the structure:
wherein each of A, D, E, and G is a carbon atom, R 2 is an octyl group, and R 3 is a butyl group.
9 . The lubricant composition of claim 1 wherein said second antioxidant has the structure:
wherein at least two of A, D, E and G are nitrogen atoms and wherein R 2 and R 3 are each independently hydrogen or N-(alkyl) 2 wherein the alkyl group has 1 to 20 carbon atoms.
10 . The lubricant composition of claim 1 wherein said second antioxidant has the structure:
wherein at least one of A, D, E and G is a nitrogen atom and wherein R 2 and R 3 are each independently hydrogen or N-(alkyl) 2 wherein the alkyl group has 1 to 20 carbon atoms.
11 . The lubricant composition of claim 1 wherein said third antioxidant has the structure:
wherein m is 1 and R 4 is:
12 . The lubricant composition of claim 1 wherein said third antioxidant has the structure:
m is 1 and R 4 is C 8 H 17 .
13 . The lubricant composition of claim 1 wherein said third antioxidant has the structure:
wherein R 5 is a methyl group and each of R 6 and R 7 is independently —CH 2 —S—C 8 H 17 .
14 . The lubricant composition of claim 1 wherein said base oil is further defined as an API Group II, Group III or Group IV oil.
15 . The lubricant composition of claim 1 having an oxidation induction time of greater than 10 minutes determined according to ASTM D6186.
16 . The lubricant composition of claim 1 having an oxidation induction time of greater than 12 minutes determined according to ASTM D6186.
17 . The lubricant composition of claim 1 having an oxidation induction time of greater than 12 minutes determined according to ASTM D6186, wherein said base oil is further defined as an API Group II oil, wherein said first antioxidant has the structure:
wherein R is a straight alkyl group having 11 carbon atoms,
wherein said second antioxidant having the structure:
wherein each of A, D, E, and G is a carbon atom, R 2 is an octyl group, and R 3 is a butyl group, and
wherein said third antioxidant having the structure:
wherein m is 1 and R 4 is:
and wherein said first, second, and third antioxidants are present in a ratio of from 0.1:0.1:0.1 to 3:5:5.
18 . A method of forming the lubricant composition of claim 1 wherein the method comprises the step of combining the base oil and the antioxidant component to form the lubricant composition.
19 . A method of reducing corrosion of a steel article, said method comprising the steps of:
A. providing a base oil; B. providing an antioxidant component comprising;
a first antioxidant having the structure,
wherein R is a straight or branched alkyl group having 7 to 17 carbon atoms, and
wherein n is from 6 to 18,
a second antioxidant having the structure:
wherein each of A, D, E and G is carbon or nitrogen and wherein R 2 and R 3 are each independently chosen from hydrogen, alkyl, N-(alkyl) 2 , styryl, and α-alkyl styryl groups, provided that at least one of R 2 and R 3 is not hydrogen, and
a third antioxidant having the structure:
wherein m is a number from 1 to 10 and R 4 is hydrogen or an alkyl group having 1 to 12 carbon atoms, and
wherein R 5 is an alkyl group having 1 to 20 carbon atoms and each of R 6 and R 7 is independently —CH 2 —S-alkyl, wherein the alkyl group bonded to the sulfur atom has 1 to 20 carbon atoms,
C. combining the base oil and the antioxidant component to form the lubricant composition wherein the base oil is present in an amount of greater than 85 parts by weight per 100 parts by weight of the lubricant composition; and
D. applying the lubricant composition to the steel article;
wherein the composition has an oxidation induction time of greater than 10 minutes determined according to ASTM D6186.
20 . The method of claim 19 wherein the composition has an oxidation induction time of greater than 12 minutes determined according to ASTM D6186, wherein the base oil is further defined as an API Group II oil, wherein the first antioxidant has the structure:
wherein R is a straight alkyl group having 11 carbon atoms,
wherein the second antioxidant having the structure:
wherein each of A, D, E, and G is a carbon atom, R 2 is an octyl group, and R 3 is a butyl group, and
wherein the third antioxidant having the structure:
wherein m is 1 and R 4 is:
and wherein the first, second, and third antioxidants are present in a ratio of from 0.1:0.1:0.1 to 3:5:5Cited by (0)
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