US3853773A - Anti-gum and solvating lubricant - Google Patents

Anti-gum and solvating lubricant Download PDF

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Publication number
US3853773A
US3853773A US00317965A US31796572A US3853773A US 3853773 A US3853773 A US 3853773A US 00317965 A US00317965 A US 00317965A US 31796572 A US31796572 A US 31796572A US 3853773 A US3853773 A US 3853773A
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Prior art keywords
mineral oil
white mineral
lubricant
oil
oils
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US00317965A
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J Martin
C Patros
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International Business Machines Corp
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International Business Machines Corp
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/68—Esters
    • C10M129/70—Esters of monocarboxylic acids
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    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/08—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium containing a sulfur-to-oxygen bond
    • C10M135/10—Sulfonic acids or derivatives thereof
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    • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04—Phosphate esters
    • C10M137/10—Thio derivatives
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    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/06—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing butene
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    • C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
    • C10M149/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M149/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amino group
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    • C10M169/04—Mixtures of base-materials and additives
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/104—Aromatic fractions
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/106—Naphthenic fractions
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    • C10M2203/108—Residual fractions, e.g. bright stocks
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    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/50—Medical uses

Definitions

  • Lubricants normally recommended for such service are hydraulic oils which are naphthenic and paraffinic in nature and contain anti-oxidants, rust inhibitors and anti-foam agents. Also investigated have been modern types of watchmaker oils which are compounded to resist aging, gumming up, spreading and evaporating. These lubricants have not provided the lubricating life sought.
  • the viscosity of transmission fluids is normally found to be in the vicinity of 180 SUS whereas in many precision machine applications a viscosity in the range of 70 to 90 SUS is desired. Since an oil that oxidizes easily (or has a poor oxidization resistance) will polymerize and increase in carbon chain length resulting in increased viscosity, it is necessary that any modification of a transmission fluid to reduce viscosity not compromise the oxidization resistance of the resulting lubricant.
  • oils used to make the anti-gum and solvating oil are as follows:
  • Oil A is a type A transmission fluid comprising a mineral oil with the following additives:
  • Anti-oxidant and corrosion inhibitor an alkaline earth metal salt of petroleum sulfonic acid; for example, calcium petroleum sulfonate.
  • Anti-wear agent metallic salt of a dialkyl dithiophosphate for example, zinc dithiophosphate.
  • Detergent and dispersant metal free ashless amine for example, copolymer of lauryl methacrylate and diethyl aminoethyl methacrylate.
  • Viscosity index improver alkyl olefin polymer for example, polyisobutylene.
  • Friction modifier a fatty ester; for example, methyl-stearate.
  • pour point depressor a wax alkylated naphthalene; for example, barium salt of wax substituted naphthalene.
  • Anti-foam agent silicone polymer for example, dimethyl silicone.
  • the viscosity of this compounded mineral oil is 180 i 10 SUS at F.
  • Oil B is a white mineral oil meeting the purity and test requirements of the US. Pharmacopoeia (U.S.P.) and National Formulary. These seven requirements are as follows:
  • the viscosity of this oil is 51 i 3 SUS at 100F.
  • Metals such as copper and iron when in the soluble state, catalyze the liquid phase oxidation of lubricating oils.
  • the presence of a metal salt reduces the length of the induction period associated with the oxidation reaction by facilitating the decomposition of the hydroperoxide to provide the free radicals essential to the chain propagating (polymerization) mechanism.
  • a lubricating oil comprising a highly compounded mineral oil containing: as an anti-oxidant and corrosion inhibitor, a calcium petroleum sulfonate; as an anti-wear agent, zinc dithiophosphate; as an detergent-dispersant, a polypolar polymer consisting of a iiitrogen containing monomer linked to a long chain methacrylate; and as a viscosity index improver, polyisobutylene, the improvement comprising adding to the base oil 25 to percent by volume of a highly refined white mineral oil not exceeding a viscosity of 180 SUS.
  • an extended life lubricant for precision mechanisms comprising a highly compounded mineral oil containing: as an anti-oxidant and corrosion inhibitor, a calcium petroleum sulfonate; as an anti-wear agent, zinc dithiophosphate; as a detergent-dispersant, a polypolar polymer consisting of a nitrogen containing monomer linked to a long chain methacrylate, the improvement comprising adding to the base oil 40 to 60 percent by volume of a highly refined white mineral oil not exceeding a viscosity of I SUS.
  • said highly refined white mineral oil is a colorless, odorless, tasteless white mineral oil insoluble in water and alcohol, miscible with oils, and which is non-alkaline and non-acid.

Abstract

Extended service lubrication properties as evidenced by a reduced viscosity increase are achieved by a lubricant composition of 25 percent to 75 percent by volume of highly compounded mineral oil in the form of type A transmission fluid with the balance highly refined white mineral oil. During accelerated oxidation testing, a significant range of compositions of the combination of oils has a viscosity increase which is less than that of either of the component oils, evidencing enhanced oxidation stability.

Description

Unite States Patent [191 Martin et a1.
[ ANTI-GUM AND SOLVATING LUBRICANT [73] Assignee: International Business Machines Corporation, Armonk, NY.
221 Filed: Dec. 26, 1972 21 Appl. No.: 317,965
[52] U.S. Cl. 252/32.7 E, 252/33.4, 252/59, 252/74, 252/76 [51] Int. Cl ClOm 1/48 [58] Field of Search 252/32.7 E, 33.4, 59, 74, 252/76 [56] References Cited UNITED STATES PATENTS 2,085,693 6/1937 Byrne 252/59 X 2,210,140 8/1940 Colbeth 252/56 2,323,360 7/1043 Wallace 252/59 X 2,851,422 9/1958 Manteuffel et al. 252/59 X Dec. 10, 1974 3,049,494 8/1962 Palmer et a1. 252/32.7 E X 3,156,652 11/1964 Foehr 252/75 3,175,976 3/1965 Foehr.... 252/75 3,250,716 5/1966 Akers 252/76 X 3,523,082 8/1970 Vienna et al. 252/33.4 X
Primary Examiner-Patrick P. Garvin Assistant ExaminerAndrew H. Metz Attorney, Agent, or FirmRobert W. Lahtinen 57 ABSTRACT 4 Claims, No Drawings BACKGROUND OF THE INVENTION In a period when increasing costs for servicing machines makes it necessary to pursue designs requiring minimum service on a regular or recurring basis, all aspects of operation must exhibit a common advance in maintenance free function. Advances in electronic reliability must be accompanied by not only reliable, maintenance free mechanical structures, but also, lubricants and lubrication techniques that have similar long term characteristics. Many lubricants commonly used for precision mechanical devices have not been wholly satisfactory.
Lubricants normally recommended for such service are hydraulic oils which are naphthenic and paraffinic in nature and contain anti-oxidants, rust inhibitors and anti-foam agents. Also investigated have been modern types of watchmaker oils which are compounded to resist aging, gumming up, spreading and evaporating. These lubricants have not provided the lubricating life sought.
Generally, satisfactory lubricating properties are found using automatic transmission fluids. These fluids possess superior performance characteristics, especially as to cleanliness and fluid life as measured by oxidative deterioration. In automatic transmissions employing fluid drive or torque converters, the hydraulic fluid performs the functions of a power transmission medium, a heat transfer medium and a lubricant for bearing surfaces. Rigorous requirements have been established for qualifying fluids for such use including a viscosity index of at least 130, a flash point of about 330F minimum, a pour point below F and additionally must pass the copper strip corrosion test and possess good oxidation resistance.
The viscosity of transmission fluids is normally found to be in the vicinity of 180 SUS whereas in many precision machine applications a viscosity in the range of 70 to 90 SUS is desired. Since an oil that oxidizes easily (or has a poor oxidization resistance) will polymerize and increase in carbon chain length resulting in increased viscosity, it is necessary that any modification of a transmission fluid to reduce viscosity not compromise the oxidization resistance of the resulting lubricant.
We have found that combining a type-A transmission fluid and a highly refined white mineral oil not only achieves superior lubricating qualities, but maintains viscosity over an extended period with a lesser percentage change than either of the oils of the combination individually. The ability of the combination of oils to exceed the ability of either component oil to maintain viscosity over an extended life exists in a range of combinations from percent to in excess of 75 percent with respect to the concentration by volume of type A transmission fluid in the combination. The optimum combination is approximately percent of each component. The range of concentrations utilized extends from approximately 25 percent to 75 percent type A transmission fluid by volume. While a 75 percent concentration has a viscosity increase during an accelerated oxidation test slightly higher than that of type A transmission fluid, the increase was only about one fourth that of a 100 percent concentration of pure white minteral oil.
The oils used to make the anti-gum and solvating oil are as follows:
Oil A is a type A transmission fluid comprising a mineral oil with the following additives:
l. Anti-oxidant and corrosion inhibitor an alkaline earth metal salt of petroleum sulfonic acid; for example, calcium petroleum sulfonate.
2. Anti-wear agent metallic salt of a dialkyl dithiophosphate; for example, zinc dithiophosphate.
3. Detergent and dispersant metal free ashless amine; for example, copolymer of lauryl methacrylate and diethyl aminoethyl methacrylate.
4. Viscosity index improver alkyl olefin polymer; for example, polyisobutylene.
5. Friction modifier a fatty ester; for example, methyl-stearate.
6. Pour point depressor a wax alkylated naphthalene; for example, barium salt of wax substituted naphthalene.
7. Anti-foam agent silicone polymer; for example, dimethyl silicone.
The viscosity of this compounded mineral oil is 180 i 10 SUS at F.
' A representative type A transmission fluid used as oil A and possessing the above qualities and composition is set forth and described in US. Pats. No. 3,156,652 and 3,175,976.
Oil B is a white mineral oil meeting the purity and test requirements of the US. Pharmacopoeia (U.S.P.) and National Formulary. These seven requirements are as follows:
1. Colorless, odorless, and tasteless.
2. Insoluble in water and alcohol.
3. Miscible with oils.
4. No acidity or alkalinity.
5. Must pass readily carbonizable substances test (hot acid test).
6. Must pass sulfur content test.
7. Must pass solid paraffin test.
The viscosity of this oil is 51 i 3 SUS at 100F.
Second only in importance to the primary function of a lubricant in reducing friction (in lubricating) isits ability to provide long life (oxidation stability) so that it may complete its heat transfer/coolant functions without triggering off sludge and varnish formation. The prevention of sludge formation and inhibition of polymerization by our oil has been shown in comparative physical tests and this is an attempt to describe the mechanism that occurs.
Metals such as copper and iron, when in the soluble state, catalyze the liquid phase oxidation of lubricating oils. The presence of a metal salt reduces the length of the induction period associated with the oxidation reaction by facilitating the decomposition of the hydroperoxide to provide the free radicals essential to the chain propagating (polymerization) mechanism. Thesereactions are as follows:
l. 2RH 0 2R (free radical) H 0 3. RH ROO R ROOH (hydroperoxide) 4. ROOl-l M" (metal ion) RO M" OH It is seen that the oxidation/reduction cycle of the metal catalyst is maintained by these two reactions. Anti-oxidants used as additives in our formulation reduce polymerization by metal deactivation and directly decompose the hydroperoxides. The purified white mineral oil has tremendous solubilizing ability. It is capable of solubilizing any polymerization products and therefore keeps sludge formation to a minimum. The combination of solubilizing and oxidation inhibition that is produced by the mixture results in an anti-gum and solvating oil.
TABLE I: Viscosity change of oils in oxidation test. Samples of each oil or mixture were tested with copper and iron particles added to accelerate oxidation.
What is claimed is:
1. In a lubricating oil comprising a highly compounded mineral oil containing: as an anti-oxidant and corrosion inhibitor, a calcium petroleum sulfonate; as an anti-wear agent, zinc dithiophosphate; as an detergent-dispersant, a polypolar polymer consisting of a iiitrogen containing monomer linked to a long chain methacrylate; and as a viscosity index improver, polyisobutylene, the improvement comprising adding to the base oil 25 to percent by volume of a highly refined white mineral oil not exceeding a viscosity of 180 SUS.
2. The lubricant of claim 1 wherein said highly refined white mineral oil is a colorless, odorless, tasteless white mineral oil insoluble in water and alcohol, miscible with oils, and which is non-alkaline and non-acid.
3. In an extended life lubricant for precision mechanisms comprising a highly compounded mineral oil containing: as an anti-oxidant and corrosion inhibitor, a calcium petroleum sulfonate; as an anti-wear agent, zinc dithiophosphate; as a detergent-dispersant, a polypolar polymer consisting of a nitrogen containing monomer linked to a long chain methacrylate, the improvement comprising adding to the base oil 40 to 60 percent by volume of a highly refined white mineral oil not exceeding a viscosity of I SUS.
4. The lubricant of claim 3 wherein said highly refined white mineral oil is a colorless, odorless, tasteless white mineral oil insoluble in water and alcohol, miscible with oils, and which is non-alkaline and non-acid.

Claims (4)

1. IN A LUBRICATING OIL COMPRISING A HIGHLY COMPOUNDED MINERAL OIL CONTAINING: AS AN ANTI-OXIDANT AND CORRISON INHIBITOR, A CALCIUM PETROLEUM SULFONATE; AS AN ANTI-WEAR AGENT, ZINC DITHIOPHOSPHATE; AS AN DETERGENT-DSIPERANT, A POLYPOLAR POLYMER CONSISTING OF A NITROGEN CONTAINING MONOMER LINKED TO A LONG CHAIN METHACRYLATE; AND AS A VISCOSITY INDEX OIMPROVER POLYISOBUTYLENE, THE IMPROVEMENT COMPRISING ADDING TO THE BASE OIL 25 TO 75 PERCENT BY VOLUME OF A HIGHLY REFINED WHITE MINERAL OIL NOT EXCEEDING A VISCOSITY OF 180 SUS.
2. The lubricant of claim 1 wherein said highly refined white mineral oil is a colorless, odorless, tasteless white mineral oil insoluble in water and alcohol, miscible with oils, and which is non-alkaline and non-acid.
3. In an extended life lubricant for precision mechanisms comprising a highly compounded mineral oil containing: as an anti-oxidant and corrosion inhibitor, a calcium petroleum sulfonate; as an anti-wear agent, zinc dithiophosphate; as a detergent-dispersant, a polypolar polymer consisting of a nitrogen containing monomer linked to a long chain methacrylate, the improvement comprising adding to the base oil 40 to 60 percent by volume of a highly refined white mineral oil not exceeding a viscosity of 180 SUS.
4. The lubricant of claim 3 wherein said highly refined white mineral oil is a colorless, odorless, tasteless white mineral oil insoluble in water and alcohol, miscible with oils, and which is non-alkaline and non-acid.
US00317965A 1972-12-26 1972-12-26 Anti-gum and solvating lubricant Expired - Lifetime US3853773A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933659A (en) * 1974-07-11 1976-01-20 Chevron Research Company Extended life functional fluid
US4469585A (en) * 1983-05-09 1984-09-04 Samuel Cukier Oxidation resistant pitches
US5254273A (en) * 1990-08-06 1993-10-19 Kyodo Yushi Co., Ltd. Grease composition
WO1995006701A1 (en) * 1993-09-03 1995-03-09 Esso Societe Anonyme Française Automotive white oil-based lubricant composition
US6156709A (en) * 1991-02-04 2000-12-05 Muntz; Pieter Jan Dirk Lubricating oil composition

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085693A (en) * 1933-04-20 1937-06-29 Standard Oil Dev Co Preparation of mineral white oils and products prepared therefrom
US2210140A (en) * 1931-11-06 1940-08-06 Colbeth Ivor Milton Lubricant and process of producing it
US2323360A (en) * 1941-07-01 1943-07-06 Standard Oil Co Transmission oil
US2851422A (en) * 1952-11-07 1958-09-09 Pure Oil Co Automatic transmission fluid
US3049494A (en) * 1958-01-15 1962-08-14 Sinclair Refining Co Power transmitting fluids
US3156652A (en) * 1961-09-29 1964-11-10 California Research Corp Automatic transmission fluid
US3175976A (en) * 1965-03-30 Automatic transmission fluids
US3250716A (en) * 1963-05-03 1966-05-10 Shell Oil Co Transmission fluids
US3523082A (en) * 1968-01-26 1970-08-04 Standard Oil Co Lubricating oil composition

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175976A (en) * 1965-03-30 Automatic transmission fluids
US2210140A (en) * 1931-11-06 1940-08-06 Colbeth Ivor Milton Lubricant and process of producing it
US2085693A (en) * 1933-04-20 1937-06-29 Standard Oil Dev Co Preparation of mineral white oils and products prepared therefrom
US2323360A (en) * 1941-07-01 1943-07-06 Standard Oil Co Transmission oil
US2851422A (en) * 1952-11-07 1958-09-09 Pure Oil Co Automatic transmission fluid
US3049494A (en) * 1958-01-15 1962-08-14 Sinclair Refining Co Power transmitting fluids
US3156652A (en) * 1961-09-29 1964-11-10 California Research Corp Automatic transmission fluid
US3250716A (en) * 1963-05-03 1966-05-10 Shell Oil Co Transmission fluids
US3523082A (en) * 1968-01-26 1970-08-04 Standard Oil Co Lubricating oil composition

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933659A (en) * 1974-07-11 1976-01-20 Chevron Research Company Extended life functional fluid
US4469585A (en) * 1983-05-09 1984-09-04 Samuel Cukier Oxidation resistant pitches
US5254273A (en) * 1990-08-06 1993-10-19 Kyodo Yushi Co., Ltd. Grease composition
US6156709A (en) * 1991-02-04 2000-12-05 Muntz; Pieter Jan Dirk Lubricating oil composition
WO1995006701A1 (en) * 1993-09-03 1995-03-09 Esso Societe Anonyme Française Automotive white oil-based lubricant composition

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