US3865743A
Expired / Lapsed
US
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Functional fluids
Assignee: McDonnell Douglas Corp
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Filing: 1972-05-01
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Granted: 1975-02-11
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Expires: 1992-05-01
Abstract
Abstract Production of functional fluids, including aircraft hydraulic fluids and aircraft engine lubricants of improved fire resistance, comprising a functional fluid base stock consisting essentially of a phosphate ester, e.g., tri-n-butyl phosphate, di-n-butyl phenyl phosphate, or mixtures thereof, and a polyalkylene glycol material, e.g., polypropylene glycol or a polypropylene glycol diether, having a molecular weight ranging from about 500 to about 2,000, and which can optionally include a dicarboxylic acid ester, e.g., a diester of adipic acid such as diisodecyl adipate, and a small amount of an organic iodo compound additive such as iodobiphenyl or iodonaphthalene incorporated in such base stock.
Inventors
- 👤 Martin B Sheratte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
C; C10; C10M; C10M3/00; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/105; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/024; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2040/00; C10N2040/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
208 words
A FUNCTIONAL FLUID COMPOSITION CONSISTING ESSENTIALLY OF A PHOSPHATE ESTER HAVING THE GENERAL FORMULA: R1-O-P(=O)(-O-R2)-O-R3 WHERE R1, R2 AND R3 ARE EACH A MEMBER SELECTED FROM THE GROUP CONSISTING OF ARYL, ALKARAYL, ALKYL OF FROM ABOUT 3 TO ABOUT 10 CARBON ATOMS, AND ALKOXYALKYL HAVING FROM ABOUT 3 TO ABOUT 8 CARBON ATOMS, AND (2) A POLYALKYLENE GLYCOL MATERIAL HAVING TERMINAL GROUPS SELECTED FROM THE CLASS CONSISTING OF FREE HYDROXYL AND ETHER GROUPS, SAID ETHER GROUPS BEING OXYALKYL GROUPS WHEREIN THE ALKYL RADICALS CONTAIN FROM 1 TO ABOUT 8 CARBON ATOMS, SAID ALKYLENE GROUPS BEING SELECTED FROM THE CLASS CONSISTING OF ETHYLENE AND PROPYLENE RADICALS, AND MIXTURES THEREOF, SAID POLYALKYLENE GLYCOL MATERIAL HAVING A MOLECULAR WEIGHT RANGING FROM ABOUT 500 TO ABOUT 2,000, SAID PHOSPHATE ESTER BEING PRESENT IN AN AMOUNT RANGING FROM ABOUT 15 TO ABOUT 90%, AND SAID GLYCOL MATERIAL BEING PRESENT IN AN AMOUNT RANGING FROM ABOUT 10 TO ABOUT 85%, BY WEIGHT OF SAID COMPOSITION, AND A SMALL AMOUNT OF ORGANIC IODO COMPOUND SUFFICIENT TO ENHANCE THE AUTOIGNITION TEMPERATURE OF SAID BASE STOCK, SAID IODO COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF ARYL AND ALKARYL MONO, DI AND TRIODIDES, SAID ARYL AND ALKARYL RADICALS CONTAINING FROM ABOUT 6 TO ABOUT 15 CARBON ATOMS.
Claim 2
Dependent Claim
208 words
A FUNCTIONAL FLUID COMPOSITION CONSISTING ESSENTIALLY OF A PHOSPHATE ESTER HAVING THE GENERAL FORMULA: R1-O-P(=O)(-O-R2)-O-R3 WHERE R1, R2 AND R3 ARE EACH A MEMBER SELECTED FROM THE GROUP CONSISTING OF ARYL, ALKARAYL, ALKYL OF FROM ABOUT 3 TO ABOUT 10 CARBON ATOMS, AND ALKOXYALKYL HAVING FROM ABOUT 3 TO ABOUT 8 CARBON ATOMS, AND (2) A POLYALKYLENE GLYCOL MATERIAL HAVING TERMINAL GROUPS SELECTED FROM THE CLASS CONSISTING OF FREE HYDROXYL AND ETHER GROUPS, SAID ETHER GROUPS BEING OXYALKYL GROUPS WHEREIN THE ALKYL RADICALS CONTAIN FROM 1 TO ABOUT 8 CARBON ATOMS, SAID ALKYLENE GROUPS BEING SELECTED FROM THE CLASS CONSISTING OF ETHYLENE AND PROPYLENE RADICALS, AND MIXTURES THEREOF, SAID POLYALKYLENE GLYCOL MATERIAL HAVING A MOLECULAR WEIGHT RANGING FROM ABOUT 500 TO ABOUT 2,000, SAID PHOSPHATE ESTER BEING PRESENT IN AN AMOUNT RANGING FROM ABOUT 15 TO ABOUT 90%, AND SAID GLYCOL MATERIAL BEING PRESENT IN AN AMOUNT RANGING FROM ABOUT 10 TO ABOUT 85%, BY WEIGHT OF SAID COMPOSITION, AND A SMALL AMOUNT OF ORGANIC IODO COMPOUND SUFFICIENT TO ENHANCE THE AUTOIGNITION TEMPERATURE OF SAID BASE STOCK, SAID IODO COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF ARYL AND ALKARYL MONO, DI AND TRIODIDES, SAID ARYL AND ALKARYL RADICALS CONTAINING FROM ABOUT 6 TO ABOUT 15 CARBON ATOMS.
Claim 3
Dependent Claim
30 words
A functional fluid composition as defined in claim 1, wherein said iodo compound is present in an amount ranging from about 0.1 to about 5%, by weight of said composItion.
Claim 4
Dependent Claim
30 words
A functional fluid composition as defined in claim 1, wherein said iodo compound is present in an amount ranging from about 0.5 to about 2.5%, by weight of said composition.
Claim 5
Dependent Claim
17 words
A functional fluid composition as defined in claim 1, wherein said iodo compound is an aryl iodide.
Claim 6
Dependent Claim
25 words
A functional fluid composition as defined in claim 2, wherein aid iodo compound is selected from the group consisting of phenyl, biphenyl and naphthyl iodides.
Claim 7
Dependent Claim
16 words
A functional fluid composition as defined in claim 5, wherein said iodo compound is a monoiodide.
Claim 8
Dependent Claim
27 words
A functional fluid composition as defined in claim 2, wherein said iodo compound is selected from the group consisting of monoiodo biphenyl, monoiodo xylene and monoiodo naphthalene.
Claim 9
Dependent Claim
28 words
A functional fluid composition as defined in claim 1, wherein said phosphate ester is selected from the group consisting of dialkyl aryl, triaryl, trialkyl, and alkyl diaryl phosphate.
Claim 10
Dependent Claim
24 words
A functional fluid composition as defined in claim 1, said glycol material being a polypropylene glycol diether having a pair of said ether groups.
Claim 11
Dependent Claim
45 words
A functional fluid composition as defined in claim 1, said glycol material being selected from the group consisting of a polypropylene glycol diether having a pair of terminal oxyalkyl groups wherein the alkyl radicals contain from 1 to about 4 carbon atoms, and polypropylene glycol.
Claim 12
Dependent Claim
79 words
A functional fluid composition as defined in claim 2, wherein said phosphate ester is selected from the group consisting of dialkyl aryl, triaryl, trialkyl and alkyl diaryl phosphates, said glycol material being selected from the group consisting of a polypropylene glycol diether having a pair of terminal oxyalkyl groups wherein the alkyl radicals contain from 1 to about 4 carbon atoms, and polypropylene glycol, said polypropylene glycol material having a molecular weight ranging from about 600 to about 1,200.
Claim 13
Dependent Claim
45 words
A functional fluid composition as defined in claim 11, said phosphate ester being present in an amount ranging from about 15 to about 70%, and said glycol material being present in an amount ranging from about 30 to about 85%, by weight of said composition.
Claim 14
Dependent Claim
25 words
A functional fluid composition as defined in claim 11, wherein said iodo compound is selected from the group consisting of phenyl, biphenyl and naphthyl iodides.
Claim 15
Dependent Claim
27 words
A functional fluid composition as defined in claim 11, wherein said iodo compound is selected from the group consisting of monoiodo biphenyl, monoiodo xylene and monoiodo naphthalene.
Claim 16
Dependent Claim
60 words
A functional fluid composition as defined in claim 14, wherein said glycol material is selected from the group consisting of an n-butyl methyl diether of polypropylene glycol having a molecular weight ranging from about 600 to about 1,200, and polypropylene glycol, and said phosphate ester is selected from the group consisting of tributyl phosphate, dibutyl phenyl phosphate and tri-n-hexyl phosphate.
Claim 17
Dependent Claim
71 words
A functional fluid composition as defined in claim 1, additionally including an amount sufficient to lower the viscosity of said fluid of a dicarboxylic acid ester selected from the group consisting of the alkyl diesters of adipic and sebacic acid, containing alkyl groups of from about 4 to about 12 carbon atoms, and an alkyl diester of phthalic acid containing alkyl groups of from about 4 to about 12 carbon atoms.
Claim 18
Dependent Claim
53 words
A functional fluid composition as defined in claim 16, said dcarboxylic acid ester being present in an amount ranging from about 0.01 to about 200% by weight of said glycol material, the total amount of said glycol material and said dicarboxylic acid ester being not greater than 85% by weight of said composition.
Claim 19
Dependent Claim
107 words
A functional fluid composition as defined in claim 11, additionally including a minor proportion of a dicarboxylic acid ester selected from the group consisting of the alkyl diesters of adipic and sebacIc acid, containing alkyl groups of from about 4 to about 12 carbon atoms, and an alkyl diester of phthalic acid containing alkyl groups of from about 4 to about 12 carbon atoms, said dicarboxylic acid ester being present in an amount ranging from 0.01 to about 200% by weight of said glycol material, the total amount of said glycol material and said dicarboxylic acid ester being not greater than 85% by weight of said composition.
Claim 20
Dependent Claim
45 words
A functional fluid composition as defined in claim 17, said dicarboxylic acid ester being an aliphatic dicarboxylic acid diester selected from the group consisting of the alkyl diesters of adipic and sebacic acid, containing alkyl groups of from about 4 to about 12 carbon atoms.
Claim 21
Dependent Claim
25 words
A functional fluid composition as defined in claim 18, wherein said iodo compound is selected from the group consisting of phenyl, biphenyl and naphthyl iodides.
Claim 22
Dependent Claim
27 words
A functional fluid composition as defined in claim 18, wherein said iodo compound is selected from the group consisting of monoiodo biphenyl, monoiodo xylene and monoiodo naphthalene.
Claim 23
Dependent Claim
63 words
A functional fluid composition as defined in claim 15, additionally including about 0.01 to about 200% by weight of said glycol material, of an alkyl diester of adipic acid containing alkyl groups of from about 4 to about 12 carbon atoms, the total amount of said glycol material and said dicarboxylic acid ester being not greater than 85% by weight of said composition.
Claim 24
Dependent Claim
72 words
A functional fluid composition as defined in claim 22, wherein said phosphate ester is tributyl phosphate, said glycol material is polypropylene glycol having a molecular weight of about 500, said alkyl diester is diisodecyl adipate, and said iodo compound is selected from the group consisting of 4-iodobiphenyl iodo xylene and 1-iodonaphthalene, and said iodo compound is present in an amount ranging from about 0.5 to about 2.5%, by weight of said composition.
Claim 25
Dependent Claim
25 words
A functional fluid composition as defined in claim 19, consisting essentially of tri-n-butyl phosphate, octyl diphenyl phosphate, dioctyl adipate, a polypropylene glycol and iodo xylene.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |