US4132656A
Expired / Lapsed
US
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Solid particles containing lubricating oil composition and method for using same
Assignee: Atlantic Richfield Co
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Filing: 1978-04-03
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Granted: 1979-01-02
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Expires: 1998-04-03
Abstract
Abstract An improved lubricating oil composition comprising a major amount by weight of oil of lubricating viscosity; a minor amount by weight of solid particles effective to improve the lubricating properties of the composition; and a minor amount by weight of at least one of certain specific polymers has been found to provide improved inhibition of sludge and varnish formation in use. The polymers useful in the present composition comprise (1) an olefin polymer, for example, an ethylene, propylene and 1,4-hexadiene terepolymer, with an dialkylaminoalkyl methacrylate grafted thereon; (2) an interpolymer prepared from a long chain n alkyl-methacrylate and a dialkylaminoalkylmethacrylate or a N (alkanone) acrylamide; or (3) mixtures thereof.
Inventors
- 👤 Donald L. DeVries
- 👤 James M. DeJovine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:58
CPC Classifications
C; C10; C10M; C10M161/00; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10M125/00; C10M149/00; C10M149/02; C10M149/10; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/061; C10M2201/062; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/083; C10M2201/084; C10M2201/087; C10M2201/10; C10M2201/102; C10M2201/105; C10M2201/16; C10M2201/18; C10M2203/00; C10M2203/10; C10M2203/102; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/06; C10M2215/062; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/043; C10M2223/045; C10M2223/06; C10M2223/065; C10M2225/00; C10M2225/02; C10M2227/00; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
99 words
A composition of matter comprising a major amount by weight of oil of lubricating viscosity; a minor amount by weight of solid particles effective to improve the lubricating properties of said composition; and a minor amount by weight of a nitrogen-containing polymer selected from the group consisting of (a) graft polymer having grafted onto an olefin polymer backbone a dialkylaminoalkyl methacrylate; (b) an interpolymer of a long chain n-alkyl-methacrylate and a dialkylaminoalkyl methacrylate or a N(alkanone) acrylamide; and (c) mixtures thereof; said nitrogen-containing polymer being present in an amount effective to reduce the deposit forming tendencies of said composition.
Claim 2
Dependent Claim
99 words
A composition of matter comprising a major amount by weight of oil of lubricating viscosity; a minor amount by weight of solid particles effective to improve the lubricating properties of said composition; and a minor amount by weight of a nitrogen-containing polymer selected from the group consisting of (a) graft polymer having grafted onto an olefin polymer backbone a dialkylaminoalkyl methacrylate; (b) an interpolymer of a long chain n-alkyl-methacrylate and a dialkylaminoalkyl methacrylate or a N(alkanone) acrylamide; and (c) mixtures thereof; said nitrogen-containing polymer being present in an amount effective to reduce the deposit forming tendencies of said composition.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein a major portion of said solid particles have a maximum transverse dimension in the range of about 1 millimicron to about 2 microns.
Claim 4
Dependent Claim
59 words
The composition of claim 2 wherein said solid particles are graphite, molybdenum disulfide, zinc oxide or mixtures thereof, said solid particles being present in the amount of about 0.05% to about 5% by weight of the total composition and said nitrogen-containing polymer is present in an amount of about 0.1% to about 12% by weight of the total composition.
Claim 5
Dependent Claim
25 words
The composition of claim 2 wherein the nitrogen-containing polymer is said graft polymer having a backbone comprising a terpolymer of ethylene, propylene and 1,4-hexadiene terpolymer.
Claim 6
Dependent Claim
25 words
The composition of claim 1 wherein said nitrogen-containing polymer is present in an amount at least about 2 times the amount of said solid particles.
Claim 7
Dependent Claim
114 words
The composition of claim 4 wherein the graft polymer comprises an oil soluble substantially linear hydrocarbonaceous polymer backbone of ethylene; at least one terminally saturated straight chain alkene containing from 3 to about 12 carbon atoms; and at least one terminally unsaturated non-conjugated diolefin containing 5 to about 8 carbon atoms, the backbone having an average chain length of about 700 to about 7,000 carbon atoms and having recurringly grafted thereon a monomer of a dialkylaminoalkyl methacrylate of the formula: ##STR8## where R '1 and R '2 are alkyl of 1 or 2 carbon atoms and A is a divalent alkylene radical of from 2 to about 4 carbon atoms and (3) mixtures thereof.
Claim 8
Dependent Claim
19 words
The composition according to claim 6 wherein about 15% to about 75% by weight of the backbone is ethylene.
Claim 9
Dependent Claim
22 words
The composition according to claim 6 wherein about 25% to about 85% by weight of the backbone is said straight chain alkene.
Claim 10
Dependent Claim
20 words
The composition according to claim 6 wherein about 0.10% to about 15% by weight of the backbone is said diolefin.
Claim 11
Dependent Claim
50 words
The composition according to claim 6 wherein the graft polymer has an inherent viscosity of between about 0.6 and 1.9 as a 0.10 wt. % solution in tetrachloroeothylene at 30° C. and has a weight ratio of backbone component to said graft component of between about 1000:1 and about 1:10.
Claim 12
Dependent Claim
48 words
The composition according to claim 6 wherein about 15% to about 75% by weight of the backbone is ethylene, about 25% to about 85% by weight of the backbone is said straight chain alkene, and about 0.10 to about 15% by weight of the backbone is said diolefin.
Claim 13
Dependent Claim
22 words
The composition of claim 2 wherein the nitrogen-containing polymer is said interpolymer having a number average molecular weight of below about 120,000.
Claim 14
Dependent Claim
34 words
The composition of claim 12 wherein the n-alkyl methacrylate monomers contain about 4 to about 22 carbon atoms in the aliphatic chain, and the number average molecular weight is between about 10,000 and 120,000.
Claim 15
Dependent Claim
22 words
The composition of claim 13 wherein the n-alkyl methacrylate monomers contain about 12 to about 18 carbon atoms in the aliphatic chain.
Claim 16
Dependent Claim
21 words
The composition of claim 14 wherein the dialkylaminoalkyl methacrylate is a di C 1 -C 6 alkylamino C 1-C 6 alkylmethacrylate.
Claim 17
Dependent Claim
11 words
The composition of claim 15 wherein said dialkyl aminomethacrylate is dimethylaminoethylmethacrylate.
Claim 18
Dependent Claim
16 words
The composition of claim 12 wherein said acrylamide is a N(C 4 -C 12 alkanone) acrylamide.
Claim 19
Dependent Claim
16 words
The composition of claim 17 wherein said acrylamide is N(1,1 dimethyl-butan-3-one) acrylamide and N(1,2 dimethyl-1-ethyl-butan-3-one) acrylamide.
Claim 20
Dependent Claim
21 words
The composition of any one of claims 1 to 18 wherein said solid particles are graphite, molybdenum disulfide or mixtures thereof.
Claim 21
Dependent Claim
47 words
The composition of claim 1 wherein said solid particles are present in an amount of about 0.1% to about 2% by weight of the total composition and said nitrogen-containing polymer is present in an amount of about 3% to about 10% by weight of the total composition.
Claim 22
Dependent Claim
26 words
The composition of claim 1 wherein said nitrogen-containing polymer is present in an amount of at least about 2.5 times the amount of said solid particles.
Claim 23
Dependent Claim
17 words
The composition of claim 1 wherein said nitrogen-containing polymer is present in an amount of said graphite.
Claim 24
Dependent Claim
31 words
A method of lubricating an internal combustion engine comprising components requiring lubrication which comprises maintaining a lubricating amount of the composition of claim 1 on components of said engine requiring lubrication.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |