US3907691A
Expired / Lapsed
US
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Extreme-pressure mixed metal borate lubricant
Assignee: Chevron USA Inc
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Filing: 1974-07-15
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Granted: 1975-09-23
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Expires: 1994-07-15
Abstract
Abstract Mixed metal borate lubricant: A. REACT BORIC ACID WITH ALKALINE EARTH METAL CARBONATE OVERBASED METAL SULFONATE IN A LUBRICATING OIL OR GREASE MEDIUM TO FORM AN INTERMEDIATE B. REACT ALKALI METAL BASE WITH INTERMEDIATE TO FORM MIXED ALKALI AND ALKALINE EARTH METAL BORATE DISPERSION.
Inventors
- 👤 John M King
- 👤 Nicolaas Bakker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:26
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C10M2201/00; C10M2201/087; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/044; C10M2217/045; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/12; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2040/00; C10N2040/02; C10N2040/20; C10N2040/22; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
120 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PORTIONS OF AN OIL OF LUBRICATING VISCOSITY AND FROM 0.1 TO 60 WEIGHT PERCENT OF A PARTICULATE MIXED ALKALI AND ALKALINE EARTH METAL BORATE MEDIUM: (1) BORIC ACID, (2) AN ALKALINE EARTH REACTION MEDIUM: (1) BORIC ACID, WITH (2) AND ALKALINE EARTH METAL CARBONATE OVERBASED ALKALI OR ALKALINE EARTH METAL SULFONATE DISPERSANT, WHEREIN THE MOLAR RATIO OF BORIC ACID TO ALKALINE EARTH METAL CARBONATE IS FROM ABOUT 2 TO ABOUT 6, TO FORM AN INTERMEDIATE REACTION PRODUCT WHICH IS THEN REACTED WITH AN ALKALI METAL BASE TO FORM SAID MIXED ALKALI AND ALKALINE EARTH METAL BORATE, WHEREIN THE MOLAR RATIO OF ALKALI METAL BASE TO SAID INTERMEDIATE IS FROM ABOUT 1 TO ABOUT 3.
Claim 2
Dependent Claim
120 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PORTIONS OF AN OIL OF LUBRICATING VISCOSITY AND FROM 0.1 TO 60 WEIGHT PERCENT OF A PARTICULATE MIXED ALKALI AND ALKALINE EARTH METAL BORATE MEDIUM: (1) BORIC ACID, (2) AN ALKALINE EARTH REACTION MEDIUM: (1) BORIC ACID, WITH (2) AND ALKALINE EARTH METAL CARBONATE OVERBASED ALKALI OR ALKALINE EARTH METAL SULFONATE DISPERSANT, WHEREIN THE MOLAR RATIO OF BORIC ACID TO ALKALINE EARTH METAL CARBONATE IS FROM ABOUT 2 TO ABOUT 6, TO FORM AN INTERMEDIATE REACTION PRODUCT WHICH IS THEN REACTED WITH AN ALKALI METAL BASE TO FORM SAID MIXED ALKALI AND ALKALINE EARTH METAL BORATE, WHEREIN THE MOLAR RATIO OF ALKALI METAL BASE TO SAID INTERMEDIATE IS FROM ABOUT 1 TO ABOUT 3.
Claim 3
Dependent Claim
26 words
The lubricating composition defined in claim 1 wherein said particulate mixed alkali and alkaline earth metal borate has a mean particle size below about 1 micron.
Claim 4
Dependent Claim
28 words
The lubricating compoSition defined in claim 2 wherein said oil of viscosity vescosity is a hydrocarbon petroleum oil having a viscosity of 50 to 1,000 SUS at 38*C.
Claim 5
Dependent Claim
32 words
The lubricating composition defined in claim 3 wherein a lipophilic, nonionic, surface-active agent having a hydrophilic-lipophilic balance value below 7 is also present at a concentration of 0.01 to 5 weight percent.
Claim 6
Dependent Claim
28 words
The lubricating composition defined in claim 2 wherein said particulate mixed alkali and alkaline earth metal borate is present at a concentration of 4 to 15 weight percent.
Claim 7
Dependent Claim
47 words
The lubricating composition defined in claim 5 wherein a thickener selected from the group consisting of polyurea, alkali metal terephthalamate, lithium hydroxy stearate, calcium complex soap and aluminum complex soap is also present in an amount to thicken said lubricating oil to the consistency of a grease.
Claim 8
Dependent Claim
21 words
The lubricating composition defined in claim 5 wherein said mixed alkali and alkaline earth metal borate is sodium and calcium borate.
Claim 9
Dependent Claim
21 words
The lubricating composition defined in claim 5 wherein said mixed alkali and alkaline earth metal borate is potassium and calcium borate.
Claim 10
Dependent Claim
31 words
The lubricating composition defined in claim 5 wherein said alkaline earth metal carbonate is calcium carbonate and wherein said alkali or alkaline earth metal sulfonate is sodium, calcium or barium sulfonate.
Claim 11
Dependent Claim
24 words
The lubricating composition defined in claim 9 wherein said particulate alkali and alkaline earth metal borate has from 0 to 8 waters of hydration.
Claim 12
Dependent Claim
84 words
A particulate dispersion of an alkali and alkaline earth metal borate prepared by contacting two molar parts of boric acid with each molar equivalent part of an alkaline earth metal carbonate overbased alkali or alkaline earth metal sulfonate within a stable, inert, oleophilic, liquid reaction medium to form an intermediate reaction product, which is then reacted with two molar parts of an alkali metal hydroxide per molar part of said intermediate reaction product to form a mixed alkali and alkaline earth metal borate dispersion.
Claim 13
Dependent Claim
84 words
A particulate dispersion of an alkali and alkaline earth metal borate prepared by contacting two molar parts of boric acid with each molar equivalent part of an alkaline earth metal carbonate overbased alkali or alkaline earth metal sulfonate within a stable, inert, oleophilic, liquid reaction medium to form an intermediate reaction product, which is then reacted with two molar parts of an alkali metal hydroxide per molar part of said intermediate reaction product to form a mixed alkali and alkaline earth metal borate dispersion.
Claim 14
Dependent Claim
30 words
The composition defined in claim 11 wherein said alkaline earth metal carbonate is calcium carbonate and wherein said alkali or alkaline earth metal sulfonate is sodium, calcium or barium sulfonate.
Claim 15
Dependent Claim
113 words
A process for preparing a particulate alkali and alkaline earth metal borate dispersion which comprises contacting an alkaline earth metal carbonate overbased alkali or alkaline earth metal sulfonate with boric acid within a stable, inert, oleophilic, liquid reaction medium, wherein the molar ratio of broic acid to alkaline earth metal carbonate is from about 2 to about 6, and the temperature is 20*- 200*C. to form an intermediate reaction product which is thereafter contacted with an alkali metal base to form said mixed alkali and alkaline earth metal borate, wherein the molar ratio of alkali metal base to said intermediate is from about 1 to about 3 and the temperature is 90*- 140*C.
Claim 16
Dependent Claim
113 words
A process for preparing a particulate alkali and alkaline earth metal borate dispersion which comprises contacting an alkaline earth metal carbonate overbased alkali or alkaline earth metal sulfonate with boric acid within a stable, inert, oleophilic, liquid reaction medium, wherein the molar ratio of broic acid to alkaline earth metal carbonate is from about 2 to about 6, and the temperature is 20*- 200*C. to form an intermediate reaction product which is thereafter contacted with an alkali metal base to form said mixed alkali and alkaline earth metal borate, wherein the molar ratio of alkali metal base to said intermediate is from about 1 to about 3 and the temperature is 90*- 140*C.
Claim 17
Dependent Claim
64 words
The process defined in claim 13 wherein said reaction of boric acid with alkaline earth metal carbonate is conducted at a temperature of 20* to 200*C. for a period of 0.5 to 7 hours and the reaction of said intermediate reaction product and said alkali metal base is conducted at a temperature of 90* to 140*C. for a period of 0.1 to 3 hours.
Claim 18
Dependent Claim
27 words
The process defined in claim 13 wherein from 3 to 5 molar parts of boric acid are contacted for each molar part of alkaline earth metal carbonate.
Claim 19
Dependent Claim
29 words
The process defined in claim 15 wherein said alkaline earth metal carbonate is calcium carbonate and said alkali or alkaline earth metal sulfonate is sodium, calcium or barium sulfonate.
Claim 20
Dependent Claim
24 words
The process defined in claim 16 wherein said particulate mixed alkali and alkaline earth metal borate has from 0 to 8 waters of hydration.
Claim 21
Dependent Claim
47 words
The process dEfined in claim 17 wherein said mixed alkali and alkaline earth metal borate is a sodium and calcium borate or a potassium and calcium borate, wherein said alkaline earth metal carbonate is calcium carbonate, and said alkali or alkaline earth metal sulfonate is calcium sulfonate.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |