US4089790A
Expired / Lapsed
US
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Synergistic combinations of hydrated potassium borate, antiwear agents, and organic sulfide antioxidants
Assignee: Chevron USA Inc
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Filing: 1975-11-28
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Granted: 1978-05-16
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Expires: 1995-11-28
Abstract
Abstract A synergistic extreme-pressure lubricating composition comprising an oil of lubricating viscosity having dispersed therein: (1) 1-60 weight percent of hydrated potassium borate microparticles having a boron to potassium ratio of about 2.5 to 4.5 (2) from 0.01 to 5.0 weight percent of an antiwear agent selected from (a) a zinc dihydrocarbyl dithiophosphate having from 4 to 20 carbons in each hydrocarbyl group; (b) a C 1 -C 20 amine salt of a dihydrocarbyl dithiophosphoric acid having from 4 to 20 carbons in each hydrocarbyl group; (c) a zinc alkyl aryl sulfonate; or (d) mixtures thereof, and (3) from 0.1 to 5 weight percent of an oil-soluble antioxidant organic sulfur compound containing from 3 to 40 weight percent sulfur, which sulfur is present as organic sulfide or polysulfide or mixtures thereof.
Inventors
- 👤 John Howard Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:28
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2201/00; C10M2201/087; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/028; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/087; C10M2219/088; C10M2219/089; C10M2221/00; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/047; C10M2223/12; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
158 words
A lubricating oil composition containing dispersed therein (1) from 1 to 60 weight percent of a particulate hydrated potassium borate having a mean particle size less than 1 micron and having a boron-to-potassium ratio of 2.5 to 4.5 and containing from 2 to 5 waters of hydration, (2) from 0.01 to 5 weight percent of an antiwear agent selected from (a) a zinc dihydrocarbyl dithiophosphate having from 4 to 20 carbons in each hydrocarbyl group, (b) a C 1 to C 20 ester, C 1 to C 20 amide, or C 1 to C 20 amine salt of a dihydrocarbyl dithiophosphoric acid having from 4 to 20 carbons in each hydrocarbyl group, (c) a zinc alkyl aryl sulfonate; and (d) mixtures thereof, and (3) from 0.1 to 5 weight percent of an oil-soluble antioxidant organic sulfur compound containing from 3 to 40 weight percent sulfur, which sulfur is present as an organic sulfide or polysulfide or mixtures thereof.
Claim 2
Dependent Claim
158 words
A lubricating oil composition containing dispersed therein (1) from 1 to 60 weight percent of a particulate hydrated potassium borate having a mean particle size less than 1 micron and having a boron-to-potassium ratio of 2.5 to 4.5 and containing from 2 to 5 waters of hydration, (2) from 0.01 to 5 weight percent of an antiwear agent selected from (a) a zinc dihydrocarbyl dithiophosphate having from 4 to 20 carbons in each hydrocarbyl group, (b) a C 1 to C 20 ester, C 1 to C 20 amide, or C 1 to C 20 amine salt of a dihydrocarbyl dithiophosphoric acid having from 4 to 20 carbons in each hydrocarbyl group, (c) a zinc alkyl aryl sulfonate; and (d) mixtures thereof, and (3) from 0.1 to 5 weight percent of an oil-soluble antioxidant organic sulfur compound containing from 3 to 40 weight percent sulfur, which sulfur is present as an organic sulfide or polysulfide or mixtures thereof.
Claim 3
Dependent Claim
54 words
The lubricating oil composition of claim 1 containing from 2.5 to 25 weight percent, based on the weight of the composition, of a particulate hydrated potassium borate having a mean particle size less than 1 micron and having a boron-to-potassium ratio of 2.5 to 4.5, and containing from 2 to 5 waters of hydration.
Claim 4
Dependent Claim
30 words
The lubricating oil composition of claim 2 wherein from 0.1 to 2 weight percent of said antiwear agent is present and from 0.25 to 3 of said antioxidant is present.
Claim 5
Dependent Claim
27 words
The lubricating oil composition of claim 3 wherein said antiwear agent is a zinc dihydrocarbyl dithiophosphate having from 5 to 12 carbon atoms in each hydrocarbyl group.
Claim 6
Dependent Claim
15 words
The lubricating oil composition of claim 3 wherein said antiwear agent is zinc dinonylnaphthylene sulfonate.
Claim 7
Dependent Claim
17 words
The lubricating oil composition of claim 3 wherein said antioxidant is sulfurized polybutene or sulfurized diparaffin polysulfide.
Claim 8
Dependent Claim
24 words
The lubricating oil composition of claim 1 wherein the hydrated potassium borate microparticles are dispersed by an oil-soluble alkali or alkaline earth metal sulfonate.
Claim 9
Dependent Claim
30 words
The lubricating oil composition of claim 1 wherein the potassium borate is dispersed in a combination of an oil-soluble alkali or alkaline earth metal sulfonate and an alkenyl succinimide dispersant.
Claim 10
Dependent Claim
21 words
The lubricating oil composition of claim 8 wherein said alkali or alkaline earth metal sulfonate dispersant is a calcium petroleum sulfonate.
Claim 11
Dependent Claim
25 words
The lubricating oil composition of claim 9 wherein said alkenyl succinimide dispersant is a polyisobutenyl succinimide prepared by reacting polyisobutenyl succinic anhydride with tetraethylene pentamine.
Claim 12
Dependent Claim
26 words
The lubricating oil composition of claim 10 wherein said antiwear agent is a zinc dihydrocarbyl dithiophosphate and said antioxidant is sulfurized polybutene or sulfurized diparaffin polysulfide.
Claim 13
Dependent Claim
24 words
The lubricating oil composition of claim 11 wherein said zinc dihydrocarbyl dithiophosphate is a zinc dialkyl dithiophosphate wherein the alkyl groups are sterically hindered.
Claim 14
Dependent Claim
32 words
In the method for lubricating a device wherein two metallic moving parts are separated by a lubricant, the improvement comprising using as the lubricant a lubricating oil composition according to claim 1.
Claim 15
Independent Claim
169 words
A method for preparing a lubricant having improved extreme-pressure properties, which comprises admixing with an oil base of lubricating viscosity: (1) from 1 to 60 weight percent of a particulate hydrated potassium borate having a mean particle size less than one micron and having a boron to potassium ratio of 2.5 to 4.5 and containing 2 to 5 waters of hydration; (2) from 0.01 to 5 weight percent of an antiwear agent selected from (a) zinc dihydrocarbyl dithiophosphate having from 4 to 20 carbons in each hydrocarbyl group, (b) a C 1 -C 20 ester, a C 1 -C 20 amide, or C 1 -C 20 amine salt of a dihydrocarbyl dithiophosphoric acid having from 4 to 20 carbons in each hydrocarbyl group, (c) a zinc alkyl aryl sulfonate, and (d) mixtures thereof; and (3) from 0.1 to 5 weight percent of an oil-soluble antioxidant organic sulfur compound containing from 3 to 40 weight percent sulfur, which sulfur is present as an organic sulfide or polysulfide or mixtures thereof.
Claim 16
Independent Claim
169 words
A method for preparing a lubricant having improved extreme-pressure properties, which comprises admixing with an oil base of lubricating viscosity: (1) from 1 to 60 weight percent of a particulate hydrated potassium borate having a mean particle size less than one micron and having a boron to potassium ratio of 2.5 to 4.5 and containing 2 to 5 waters of hydration; (2) from 0.01 to 5 weight percent of an antiwear agent selected from (a) zinc dihydrocarbyl dithiophosphate having from 4 to 20 carbons in each hydrocarbyl group, (b) a C 1 -C 20 ester, a C 1 -C 20 amide, or C 1 -C 20 amine salt of a dihydrocarbyl dithiophosphoric acid having from 4 to 20 carbons in each hydrocarbyl group, (c) a zinc alkyl aryl sulfonate, and (d) mixtures thereof; and (3) from 0.1 to 5 weight percent of an oil-soluble antioxidant organic sulfur compound containing from 3 to 40 weight percent sulfur, which sulfur is present as an organic sulfide or polysulfide or mixtures thereof.
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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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |