US4569776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-based hydraulic fluid compositions containing selected two-component anti-wear agents
Assignee: Gateway Additive Co
•
Filing: 1985-03-22
•
Granted: 1986-02-11
•
Expires: 2005-03-22
Abstract
Abstract Disclosed is an improved water-based hydraulic fluid composition which comprises an aqueous composition having a viscosity of at least 5 centistokes at 40 DEG C. which contains up to about 95 percent by weight of water, at least 0.1 percent by weight of a carboxylic acid lubricity agent, and an effective amount of at least one selected anti-wear additive; wherein the improvement comprises: said anti-wear agent comprising the combination of: (a) an aromatic compound containing one to three electron-releasing substituent components, wherein said electron-releasing substituents are selected from the group consisting of amino, alkyl-substituted amino having 1 to about 12 carbon atoms, amido groups of the formula -NHC(=O)R wherein R is an alkyl group having 1 to about 12 carbon atoms, alkoxy having 1 to about 12 carbon atoms, and mixtures thereof; with (b) an aromatic compound containing one to three electron-withdrawing substituent components, wherein said electron-withdrawing substituents are selected from the group consisting of nitro, cyano, sulfo, and mixtures thereof.
Inventors
- 👤 Philip R. Miller
- 👤 Richard M. Mullins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:53
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M129/00; C10M129/02; C10M129/26; C10M129/28; C10M129/38; C10M129/44; C10M129/48; C10M129/54; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C10M133/16; C10M133/24; C10M133/30; C10M133/32; C10M135/00; C10M135/08; C10M135/10; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/123; C10M2207/125; C10M2207/128; C10M2207/129; C10M2207/14; C10M2207/142; C10M2207/144; C10M2207/22; C10M2209/00; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/068; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/16; C10M2215/20; C10M2215/202; C10M2215/24; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
181 words
In a water-based hydraulic fluid composition which comprises an aqueous composition having a viscosity of at least 5 centistokes at 40° C. which contains up to about 95 percent by weight of water, at least 0.1 percent by weight of a carboxylic acid lubricity agent and an effective amount of an anti-wear agent, wherein the improvement comprises: said anti-wear agent comprising the combination of: (a) at least about 0.0025 gram-moles per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-releasing substituent components, wherein said electron-releasing substituents are selected from the group consisting of amino, alkyl-substituted amino having 1 to about 12 carbon atoms, amido groups of the formula --NHC(═O)R wherein R is an alkyl group having 1 to about 12 carbon atoms, alkoxy having 1 to about 12 carbon atoms, and mixtures thereof; with (b) at least about 0.0025 gram-mole per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-withdrawing substituent components, wherein said electron-withdrawing substituents are selected from the group consisting of nitro, cyano, sulfo, and mixtures thereof.
Claim 2
Dependent Claim
181 words
In a water-based hydraulic fluid composition which comprises an aqueous composition having a viscosity of at least 5 centistokes at 40° C. which contains up to about 95 percent by weight of water, at least 0.1 percent by weight of a carboxylic acid lubricity agent and an effective amount of an anti-wear agent, wherein the improvement comprises: said anti-wear agent comprising the combination of: (a) at least about 0.0025 gram-moles per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-releasing substituent components, wherein said electron-releasing substituents are selected from the group consisting of amino, alkyl-substituted amino having 1 to about 12 carbon atoms, amido groups of the formula --NHC(═O)R wherein R is an alkyl group having 1 to about 12 carbon atoms, alkoxy having 1 to about 12 carbon atoms, and mixtures thereof; with (b) at least about 0.0025 gram-mole per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-withdrawing substituent components, wherein said electron-withdrawing substituents are selected from the group consisting of nitro, cyano, sulfo, and mixtures thereof.
Claim 3
Dependent Claim
18 words
The water-based hydraulic fluid of claim 1 which contains at least about 20 percent by weight of water.
Claim 4
Dependent Claim
21 words
The water-based hydraulic fluid of claim 1 wherein component (a) of said anti-wear agent is a substituted mononuclear benzoic acid compound.
Claim 5
Dependent Claim
42 words
The water-based hydraulic fluid of claim 3 wherein said benzoic acid compound is selected from the group consisting of monoaminobenzoic acids; diaminobenzoic acids; mono-(alkoxy-substituted) benzoic acids wherein the carbon atoms in said alkoxy group contains from about 1 to 12 carbon atoms.
Claim 6
Dependent Claim
16 words
The water-based hydraulic fluid of claim 3 wherein said benzoic acid compounds are para-substituted benzoic acids.
Claim 7
Dependent Claim
28 words
The water-based hydraulic fluid of claim 5 wherein said benzoic acid compound is selected from the group consisting of p-aminobenzoic acid, 3,4-diaminobenzoic acid, p-methoxybenzoic acid and p-n-butoxybenzoic acid.
Claim 8
Dependent Claim
22 words
The water-based hydraulic fluid of claim 1 wherein component (a) of said anti-wear agent is a mononuclear para-substituted benzene sulfonic acid compound.
Claim 9
Dependent Claim
13 words
The water-based hydraulic fluid of claim 7 wherein component (a) is p-aminobenzenesulfonic acid.
Claim 10
Dependent Claim
21 words
The water-based hydraulic fluid of claim 1 wherein component (b) of said anti-wear agent is a substituted mononuclear benzoic acid compound.
Claim 11
Dependent Claim
29 words
The water-based hydraulic fluid of claim 9 wherein benzoic acid compound is selected from the group consisting of mononitrobenzoic acid, dinitrobenzoic acid, trinitrobenzoic acid, monocyanobenzoic acid and monosulfobenzoic acid.
Claim 12
Dependent Claim
17 words
The water-based hydraulic fluid of claim 10 wherein said benzoic acid compound is a parasubstituted benzoic acid.
Claim 13
Dependent Claim
24 words
The water-based hydraulic fluid of claim 11 wherein said benzoic acid compound is selected from the group consisting of p-nitrobenzoic acid and p-cyanobenzoic acid.
Claim 14
Independent Claim
148 words
A method for enhancing the anti-wear properties of water-based hydraulic fluid compositions containing an acidic lubricity agent which comprises incorporating into said hydraulic fluid said anti-wear agent comprising the combination of: (a) at least about 0.0025 gram-moles per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-releasing substituent components, wherein said electron-releasing substituents are selected from the group consisting of amino, alkyl-substituted amino having 1 to about 12 carbon atoms, amido groups of the formula --NHC(═O)R wherein R is an alkyl group having 1 to about 12 carbon atoms, alkoxy having 1 to about 12 carbon atoms, and mixtures thereof; with (b) at least about 0.0025 gram-mole per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-withdrawing substituent components, wherein said electron-withdrawing substituents are selected from the group consisting of nitro, cyano, sulfo, and mixtures thereof.
Claim 15
Independent Claim
148 words
A method for enhancing the anti-wear properties of water-based hydraulic fluid compositions containing an acidic lubricity agent which comprises incorporating into said hydraulic fluid said anti-wear agent comprising the combination of: (a) at least about 0.0025 gram-moles per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-releasing substituent components, wherein said electron-releasing substituents are selected from the group consisting of amino, alkyl-substituted amino having 1 to about 12 carbon atoms, amido groups of the formula --NHC(═O)R wherein R is an alkyl group having 1 to about 12 carbon atoms, alkoxy having 1 to about 12 carbon atoms, and mixtures thereof; with (b) at least about 0.0025 gram-mole per liter of said water-based hydraulic fluid of an aromatic compound containing one to three electron-withdrawing substituent components, wherein said electron-withdrawing substituents are selected from the group consisting of nitro, cyano, sulfo, and mixtures thereof.
References Cited (Backward Citations)
US2330239A
Cited
US3227652A
Cited
US3245909A
Cited
GB1099620A
Cited
US3826746A
Cited
US4347148A
Cited
US4434066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |