US3625899A
Expired / Lapsed
US
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Water-insensitive hydraulic fluids containing borate esters
Assignee: Olin Corp
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Filing: 1968-04-01
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Granted: 1971-12-07
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Expires: 1988-04-01
Abstract
Abstract A water-insensitive hydraulic fluid composition comprising from about 54.5 to about 92 percent by weight of at least one borate ester, from 0 to about 20 percent by weight of a polyoxyalkylene glycol and from about 3 to about 43 percent by weight of a glycol monoether or diether diluent together with minor amounts of an alkaline buffer and an antioxidant, if desired. Such waterinsensitive hydraulic fluids are high boiling compositions suitable for use as brake fluids.
Inventors
- 👤 Arthur W Sawyer
- 👤 David A Csejka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:27
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C07; C07F; C07F5/00; C07F5/02; C07F5/04; C10M105/00; C10M105/78; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M125/00; C10M125/20; C10M125/26; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M133/38; C10M133/40; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/28; C10M145/36; C10M169/00; C10M169/04; C10M169/044; C10M3/00; F; F02; F02M; F02M1/00; C10M2201/00; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/083; C10M2201/084; C10M2201/085; C10M2201/087; C10M2201/10; C10M2201/102; C10M2201/105; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/024; C10M2207/025; C10M2207/026; C10M2207/04; C10M2207/046; C10M2207/08; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/18; C10M2207/20; C10M2207/28; C10M2207/282; C10M2207/284; C10M2207/285; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/044; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/14; C10M2215/18; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/087; C10M2219/088; C10M2219/089; C10M2219/09; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2227/00; C10M2227/06; C10M2227/061; C10M2227/0615; C10M2227/062; C10M2227/0625; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
439 words
A hydraulic fluid composition consisting essentially of (A) from about 54.5 to about 92 percent by weight, based on the total weight of the fluid composition of at least one base or lubricant selected from the group consisting of (a) borate ester of the formula: (R1(O-(CxH2x))y-O)3-B wherein R1 is alkyl of from one to four carbon atoms, x is an integer of from 2 to 4 and y is an integer of from 2 to 4; (b) a borate ester of the formula: (R1-(OCH2CHR2)m-(OCH2CHR3)nO)3-B, wherein R1 is alkyl of from one to four carbon atoms, R2 and R3 are independently selected from the group consisting of hydrogen and methyl, m and n are positive integers whose sum is from 2 to 20, and with the proviso that one of R2 and R3 is methyl and one of R2 and R3 is hydrogen; (c) a borate ester of the formula: (R1(Rg)O)3-B, wherein R1 is alkyl of from one to four carbon atoms, Rg is a heteric oxyalkylene chain of the formula: (-(OCH2CH2)r, (OCH2 CHCH3)s-), wherein the sum of r and s is not more than 20 and wherein the weight percent of the oxyethylene units is not less than 20 based on the total weight of all the oxyalkylene units; and (d) a borate ester of the formula: wherein T1, T2 and T3 are each an independently selected alkyl group having from one to four carbon atoms; R4, R5, R6, R7, R8 and R9 are independently selected from the group consisting of hydrogen and methyl, n and m are positive integers independently selected in each chain and whose sum in each chain is from 2 to 20 and with the proviso that in no more than two of the chains is the sum of n and M the same; (B) from 0 to about 20 percent by weight, based on the total weight of the fluid composition, of a polyoxyalkylene glycol having a molecular weight of not less than 150 and up to about 400, (C) from about 3 to about 43 percent by weight, based on the total weight of the fluid, of at least one diluent having the formula: R(O-(CH2)x)yOR'', wherein R is alkyl of one to four inclusive carbon atoms, R'' is selected from the group consisting of hydrogen and alkyl of from one to four inclusive carbon atoms, x is an integer of from 2 to 4 inclusive, and y is an integer of from 2 to 4 inclusive and (D) from about 0.5 to about 6.0 percent by weight, based on the total weight of the fluid of an inhibitor for pH and corrosion control.
Claim 2
Dependent Claim
15 words
The hydraulic fluid composition of claim 2 wherein the said base or lubricant is: (CH3(OCH2CH2)3O)3-B.
Claim 3
Dependent Claim
21 words
The hydraulic fluid composition of claim 2 wherein the said polyoxyalkylene compound is polyethylene glycol having a molecular weight of 300.
Claim 4
Dependent Claim
24 words
The hydraulic fluid composition of claim 2 wherein the said diluent is a mixture of triethylene glycol monomethyl ether and tetraethylene glycol monoethyl ether.
Claim 5
Dependent Claim
13 words
The hydraulic fluid of claim 2 wherein the said inhibitor is N-ethyl morpholine.
Claim 6
Dependent Claim
18 words
The hydraulic fluid composition of claim 2 wherein the said inhibitor is a mixture of diethanolamine and tolutriazole.
Claim 7
Dependent Claim
451 words
A hydraulic fluid composition consisting essentially of (A) from about 54.5 to about 92 percent by weight, based on the total weight of the fluid composition of at least one base or lubricant selected from the group consisting of (a) borate ester of the formula: (R1(O-(CxH2x))y-O)3-B wherein R1 is alkyl of from one to four carbon atoms, x is an integer of from 2 to 4 and y is an integer of from 2 to 4; (b) a borate ester of the formula: (R1-(OCH2CHR2)m-(OCH2CHR3)nO)3-B, wherein R1 is alkyl of from one to four carbon atoms, R2 and R3 are independently selected from the group consisting of hydrogen and methyl, m and n are positive integers whose sum is from 2 to 20, and with the proviso that one of R2 and R3 is methyl and one of R2 and R3 is hydrogen; (c) a borate ester of the formula: (R1(Rg)O)3-B, wherein R1 is alkyl of from one to four carbon atoms, Rg is a heteric oxyalkylene chain of the formula: (-(OCH2CH2)r, (OCH2CHCH3)s-), wherein the sum of r and s is not more than 20 and wherein the weight percent of the oxyethylene units is not less than 20 based on the total weight of all the oxyalkylene units; and (d) a borate ester of the formula: wherein T1, T2, and T3 are each an independently selected alkyl group having from one to four carbon atoms; R4, R5, R6, R7, R8 and R9 are independently selected from the group consisting of hydrogen and methyl, n and m are positive integers independently selected in each chain and whose sum in each chain is from 2 to 20, and with the proviso that in no more than two of the chains is the sum of n and m the same; (B) from 0 to about 20 percent by weight based on the total weight of the fluid composition of an polyoxyalkylene glycol having a molecular weight of not less than 150 and up to about 400, (C) from about 3 to about 43 percent by weight based on the total weight of the fluid oF at least one diluent having the formula: R(O-(CH2)x)yOR'', wherein R is alkyl of one to four inclusive carbon atoms, R'' is selected from the group consisting of hydrogen and alkyl of from one to four inclusive carbon atoms, x is an integer of from 2 to 4 inclusive and y is an integer of from 2 to 4 inclusive, (D) from about 0.05 to about 6.0 percent by weight, based on the weight of the total fluid, of an inhibitor for pH and corrosion control and (E) from about 0.001 to about 1.0 percent by weight of an antioxidant.
Claim 8
Dependent Claim
15 words
The hydraulic fluid composition of claim 8 wherein the said base or lubricant is: (CH3(OCH2CH2)3O)3-B.
Claim 9
Dependent Claim
21 words
The hydraulic fluid composition of claim 8 wherein the said polyoxyalkylene glycol is polyethylene glycol having a molecular weight of 300.
Claim 10
Dependent Claim
24 words
The hydraulic fluid composition of claim 8 wherein the said diluent is a mixture of triethylene glycol monomethyl ether and tetraethylene glycol monoethyl ether.
Claim 11
Dependent Claim
14 words
The hydraulic fluid composition of claim 8 wherein the said antioxidant is sodium nitrite.
Claim 12
Dependent Claim
18 words
The hydraulic fluid composition of claim 8 wherein the said inhibitor is a mixture of diethanolamine and tolutriazole.
Claim 13
Dependent Claim
41 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (CH3(OCH2CH2)3O)3-B 67.39 Triethylene glycol monomethyl ether 23.20 Diethanolamine 1.78 Polyethylene glycol (Mol. wt. 300) 7.62 Sodium nitrite 0.01
Claim 14
Dependent Claim
42 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (CH3(OCH2CH2)3O)3-B 75.00 Triethylene glycol monomethyl ether 6.20 Tetraethylene glycol monoethyl ether 17.00 Diethanolamine 1.68 Tolutriazole 0.10 Sodium nitrite 0.02
Claim 15
Dependent Claim
39 words
The hydraulic fluid composition of claim 3 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (CH3(OCH2CH2)3O)3-B 65.0 Tripropylene glycol dimethyl ether 22.9 N-ethyl morpholine 4.4 Polyethylene glycol (Mol. wt. 250) 7.7
Claim 16
Dependent Claim
41 words
The hydraulic fluid composition of claim 3 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (CH3(OCH2CH2)3O)3-B 67.04 Triethylene glycol monomethyl ether 21.72 N-phenyl morpholine 1.89 Diethanolamine 0.85 Polyethylene glycol (Mol. wt. 300) 8.50
Claim 17
Dependent Claim
47 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (C4H9(OCH2CH2)2O)3-B44.68 (CH3(OCH2CH2)3O)3-B 31.63 Diethylene glycol monobutyl ether 3.81 Triethylene glycol monomethyl ether 11.05 Diethanolamine 1.83 Polyethylene glycol (Mol. wt. 300) 6.98 Sodium nitrite 0.02
Claim 18
Dependent Claim
41 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (C2H5(OCH2CH2)3O)3-B 82.78 Triethylene glycol monoethyl ether 10.00 Methyldiethanolamine 2.20 Polyethylene glycol (Mol. wt. 300) 5.00 Sodium nitrite 0.02
Claim 19
Dependent Claim
41 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (CH3(OCH2CH2)3O)3-B 70.13 Triethylene glycol monomethyl ether 20.00 Diethanolamine 1.86 Triethylene glycol (Mol. wt. 150) 8.00 Sodium nitrite 0.01
Claim 20
Dependent Claim
43 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (C4H9(OCH2CH2)3O)3-B 28.29 (CH3(OCH2CH2)3O)3-B 55.58 Triethylene glycol monomethyl ether 8.05 Polyethylene glycol (Mol. wt. 300) 6.11 Methyldiethanolamine 1.94 Sodium nitrite 0.03
Claim 21
Dependent Claim
26 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight (Borate Ester D)80.46
Claim 22
Dependent Claim
96 words
The hydraulic fluid composition of claim 8 consisting essentially of the following ingredients in the approximate percentage by weight indicated: Percent by Weight Borate Ester (E) of the formula (c) prepared as described below: 29.18 (CH3(OCH2CH2)3O)3-B 55.48 Triethylene glycol monomethyl ether 11.9 Diethanolamine 0.91 Polyethylene glycol (Mol. wt. 300) 2.52 Sodium nitrite 0.01 The borate ester of the formula (c) noted above is prepared by adding a random addition product of ethylene oxide, propylene oxide, and butyl alcohol to a mixture of toluene and ortho boric acid and heating the combined mixture to its boiling point.
Claim 23
Dependent Claim
320 words
In the operation of a fluid pressure operating device which uses hydraulic pressure transmission fluid, the improvement comprising using as said hydraulic pressure transmission fluid a composition consisting essentially of from about 54.5 to about 92 percent by weight, based on the total weight of the fluid composition, of at least one borate ester selected from the group consisting of (a) a borate ester of the formula: (R1(O-(CxH2x))y-O)3-B wherein R1 is alkyl of from one to four carbon atoms, x is an integer of from 2 to 4 and y is an integer of from 2 to 4; (b) a borate ester of the formula: (R1-(OCH2CHR2)m-(OCH2CHR3)nO)3-B, wherein R1 is alkyl of from one to four carbon atoms, R2 and R3 are independently selected from the group consisting of hydrogen and methyl, m and n are positive integers whose sum is from 2 to 20, and with the proviso that one of R2 and R3 is methyl and one of R2 and R3 is hydrogen; (c) a borate ester of the formula: (R1(Rg) O)3-B, wherein R1 is alkyl of from one to four carbon atoms, Rg is a heteric oxyalkylene chain of the formula: (-(OCH2CH2)r, (OCH2CHCH3)s-), wherein the sum of r and s is not more than 20 and wherein the weight percent of the oxyethylene units is not less than 20 based on the total weight of all the oxyalkylene units; and (d) a borate ester of the formula: wherein T1, T2 and T3 are each an independently selected alkyl group having from one to four carbon atoms; R4, R5, R6, R7, R8 and R9 are independently selected from the group consisting of hydrogen and methyl, n and m are positive integers independently selected in each chain and whose sum in each chain is from 2 to 20, and with the proviso that in no more than two of the chains is the sum of n and m the same.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |