US4606834A
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Lubricating oil containing VII pour depressant
Assignee: Afton Chemical Additives Corp
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Filing: 1985-09-10
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Granted: 1986-08-19
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Expires: 2005-09-10
Abstract
Abstract A multifunctional additive for lube oils contains a terpolymer of lauryl methacrylate, stearyl methacrylate, and N,N-dimethylaminopropyl methacrylamide.
Inventors
- 👤 William P. Hart
- 👤 Donald L. Mays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:47
CPC Classifications
C; C10; C10M; C10M149/00; C10M149/02; C10M149/04; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C10M149/06; C10M151/00; C10M151/02; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
104 words
A lubricating oil composition comprising (i) a major portion of a hydrocarbon lubricating oil and (ii) a minor, effective, viscosity index improving amount of a terpolymer of (i) a first monomer ##STR9## (ii) a second monomer ##STR10## and (iii) a third monomer ##STR11## wherein A is --NH--, --O--, or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R" is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 2
Dependent Claim
104 words
A lubricating oil composition comprising (i) a major portion of a hydrocarbon lubricating oil and (ii) a minor, effective, viscosity index improving amount of a terpolymer of (i) a first monomer ##STR9## (ii) a second monomer ##STR10## and (iii) a third monomer ##STR11## wherein A is --NH--, --O--, or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R" is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 3
Dependent Claim
18 words
A lubricating oil composition as claimed in claim 1 wherein in said first monomer, R 2 is lauryl.
Claim 4
Dependent Claim
24 words
A lubricating oil composition as claimed in claim 1 wherein said first monomer is present in said terpolymer in amount of 58 mole%-73 mole%.
Claim 5
Dependent Claim
18 words
A lubricating oil composition as claimed in claim 1 wherein in said second monomer, R 3 is stearyl.
Claim 6
Dependent Claim
24 words
A lubricating oil composition as claimed in claim 1 wherein said second monomer is present in said terpolymer in amount of 21 mole%-35 mole%.
Claim 7
Dependent Claim
17 words
A lubricating oil composition as claimed in claim 1 wherein in said third monomer, R' is methyl.
Claim 8
Dependent Claim
24 words
A lubricating oil composition as claimed in claim 1 wherein said third monomer is present in said terpolymer in amount of 6 mole%-7 mole%.
Claim 9
Dependent Claim
20 words
A lubricating oil composition as claimed in claim 1 wherein the molecular weight M n of said terpolymer is 20,000-120,000.
Claim 10
Dependent Claim
20 words
A lubricating oil composition as claimed in claim 1 wherein the molecular weight M n of said terpolymer is 40,000-100,000.
Claim 11
Dependent Claim
18 words
A lubricating oil composition as claimed in claim 1 wherein said viscosity improving amount is 0.01 w%-2.5 w%.
Claim 12
Dependent Claim
67 words
A lubricating oil composition comprising (i) a major portion of a hydrocarbon lubricating oil and (ii) a viscosity index improving amount of 0.01 w%-2.5 w% of a terpolymer, of molecular weight M n of 20,000-120,000, of (a) as first monomer 58-73 mole% derived from lauryl methacrylate; (b) as second monomer 21-35 mole% derived from stearyl methacrylate; and (c) as third monomer 6-7 mole% derived from N,N-dimethylaminopropyl methacrylamide.
Claim 13
Dependent Claim
67 words
A lubricating oil composition comprising (i) a major portion of a hydrocarbon lubricating oil and (ii) a viscosity index improving amount of 0.01 w%-2.5 w% of a terpolymer, of molecular weight M n of 20,000-120,000, of (a) as first monomer 58-73 mole% derived from lauryl methacrylate; (b) as second monomer 21-35 mole% derived from stearyl methacrylate; and (c) as third monomer 6-7 mole% derived from N,N-dimethylaminopropyl methacrylamide.
Claim 14
Independent Claim
100 words
The method of improving the properties of a lubricating oil composition which comprises adding thereto a viscosity-index improving amount of a terpolymer of (i) a first monomer ##STR12## (ii) a second monomer ##STR13## and (iii) a third monomer ##STR14## wherein A is --NH--, --O--, or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R' is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 15
Independent Claim
100 words
The method of improving the properties of a lubricating oil composition which comprises adding thereto a viscosity-index improving amount of a terpolymer of (i) a first monomer ##STR12## (ii) a second monomer ##STR13## and (iii) a third monomer ##STR14## wherein A is --NH--, --O--, or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R' is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 16
Dependent Claim
82 words
A terpolymer consisting essentially of (i) a first monomer ##STR15## (ii) a second monomer ##STR16## and (iii) a third monomer ##STR17## wherein A is --NH--, --O--, or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R' is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 17
Dependent Claim
82 words
A terpolymer consisting essentially of (i) a first monomer ##STR15## (ii) a second monomer ##STR16## and (iii) a third monomer ##STR17## wherein A is --NH--, --O--, or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R' is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 18
Dependent Claim
16 words
A terpolymer as claimed in claim 13 wherein in said first monomer, R 2 is lauryl.
Claim 19
Dependent Claim
23 words
A terpolymer as claimed in claim 13 wherein in said first monomer is present in said terpolymer in amount of 58 mole%-73 mole%.
Claim 20
Dependent Claim
16 words
A terpolymer as claimed in claim 13 wherein in said second monomer, R 3 is stearyl.
Claim 21
Dependent Claim
23 words
A terpolymer as claimed in claim 13 wherein in said second monomer is present in said terpolymer in amount of 21 mole%-35 mole%.
Claim 22
Dependent Claim
15 words
A terpolymer as claimed in claim 13 wherein in said third monomer, R' is methyl.
Claim 23
Dependent Claim
23 words
A terpolymer as claimed in claim 13 wherein in said third monomer is present in said terpolymer in amount of 6 mole%-7 mole%.
Claim 24
Dependent Claim
18 words
A terpolymer as claimed in claim 13 wherein the molecular weight M n of said terpolymer is 20,000-120,000.
Claim 25
Dependent Claim
18 words
A terpolymer as claimed in claim 13 wherein the molecular weight M n of said terpolymer is 40,000-100,000.
Claim 26
Dependent Claim
18 words
A terpolymer as claimed in claim 13 wherein the molecular weight M n of said terpolymer is 50,000-90,000.
Claim 27
Dependent Claim
43 words
A terpolymer of molecular weight M n of 60,000-80,000, consisting essentially of (a) as first monomer 58-73 mole% derived from lauryl methacrylate; (b) as second monomer 21-35 mole% derived from stearyl methacrylate; and (c) as third monomer 6-7 mole% derived from N,N-dimethylaminopropyl methacrylamide.
Claim 28
Dependent Claim
43 words
A terpolymer of molecular weight M n of 60,000-80,000, consisting essentially of (a) as first monomer 58-73 mole% derived from lauryl methacrylate; (b) as second monomer 21-35 mole% derived from stearyl methacrylate; and (c) as third monomer 6-7 mole% derived from N,N-dimethylaminopropyl methacrylamide.
Claim 29
Independent Claim
89 words
The method which comprises copolymerizing a mixture of monomers consisting essentially of (i) a first monomer ##STR18## (ii) a second monomer ##STR19## and (iii) a third monomer ##STR20## wherein A is --NH--, --O--; or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R' is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 30
Independent Claim
89 words
The method which comprises copolymerizing a mixture of monomers consisting essentially of (i) a first monomer ##STR18## (ii) a second monomer ##STR19## and (iii) a third monomer ##STR20## wherein A is --NH--, --O--; or --S--; R 1 is hydrogen or a lower alkyl group; R 2 is a C 10 -C 15 alkyl group; R 3 is a C 16 -C 20 alkyl group; R 4 and R 5 are hydrogen alkyl, alkaryl, aralkyl, cycloalkyl, or aryl groups; and R' is an alkylene, cycloalkylene, alkarylene, aralkylene, or arylene group.
Claim 31
Dependent Claim
15 words
The method claimed in claim 22 wherein in said first monomer, R 1 is lauryl.
Claim 32
Dependent Claim
21 words
The method claimed in claim 22 wherein said first monomer is present in said terpolymer in amount of 58 mole%-73 mole%.
Claim 33
Dependent Claim
15 words
The method claimed in claim 22 wherein in said second monomer, R 2 is stearyl.
Claim 34
Dependent Claim
21 words
The method claimed in claim 22 wherein said second monomer is present in said terpolymer in amount of 21 w%-35 mole%.
Claim 35
Dependent Claim
14 words
The method claimed in claim 22 wherein in said third monomer R' is methyl.
Claim 36
Dependent Claim
22 words
The method claimed in claim 22 wherein in said third monomer is present in said terpolymer in amount of 6 mole%-7 mole%.
Claim 37
Dependent Claim
17 words
The method claimed in claim 22 wherein the molecular weight M n of said terpolymer is 20,000-120,000.
Claim 38
Dependent Claim
17 words
The method claimed in claim 22 wherein the molecular weight M n of said terpolymer is 40,000-100,000.
Claim 39
Independent Claim
43 words
The method which comprises copolymerizing a mixture of monomers consisting essentially of (a) as first monomer 58 mole%-73 mole% of lauryl methacrylate; (b) as second monomer 21 mole%-35 mole% of stearyl methacrylate; and (c) as third monomer 6 mole%-7 mole% of N,N-dimethylaminopropyl methacrylamide.
Claim 40
Independent Claim
43 words
The method which comprises copolymerizing a mixture of monomers consisting essentially of (a) as first monomer 58 mole%-73 mole% of lauryl methacrylate; (b) as second monomer 21 mole%-35 mole% of stearyl methacrylate; and (c) as third monomer 6 mole%-7 mole% of N,N-dimethylaminopropyl methacrylamide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |