US3822208A - Electric contact grease - Google Patents

Electric contact grease Download PDF

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Publication number
US3822208A
US3822208A US00346794A US34679473A US3822208A US 3822208 A US3822208 A US 3822208A US 00346794 A US00346794 A US 00346794A US 34679473 A US34679473 A US 34679473A US 3822208 A US3822208 A US 3822208A
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US
United States
Prior art keywords
contact
electric contact
grease
percent
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00346794A
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English (en)
Inventor
M Haga
K Kariya
A Inami
S Shida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
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Publication of US3822208A publication Critical patent/US3822208A/en
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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
    • C10M7/00—Solid or semi-solid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single solid or semi-solid substances
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/34—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C10M2215/065—Phenyl-Naphthyl amines
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/066—Arylene diamines
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/067—Polyaryl amine alkanes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/16—Dielectric; Insulating oil or insulators
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/17—Electric or magnetic purposes for electric contacts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/08—Solids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy

Definitions

  • the present invention relates to an electric contact grease which has particular application in sliding contacts of electrical machines and apparatuses.
  • contact failure is usually caused by oxidation, sulphurization and wear of contact metal surfaces and sludge formed by oxidation and polymerization of grease itself used for the contact. Therefore, the role of contact grease is to prevent oxidation, sulphurization and wear of contact metals so as to stabilize the electric contact resistance, to prevent noise and to lengthen the life of the electric contact.
  • a contact grease according to the present invention consists essentially of a major amount of di-Z-ethyl-hexyl sebacate, 0.5 to 40.0 percent by weight of polyoxypropylene butyl ether (POPBE) C H O(CH 'CH-CH O),,H, 0.2 to 5.0 percent by weight of an amino compound as an antioxidant, and 9 to 18 percent by weight of lithium stearate.
  • POPBE polyoxypropylene butyl ether
  • the novel contact grease according to the present invention prevents an electric contact from failing, and ensures satisfactory contacting action for a longer time period, especially when applied to an electric contact which is composed of a contact rivet made of a metal selected from the group consisting of platinum, gold, silver, copper and their alloys as one contact, and the other contact is a plate made of nickel or nickel silver.
  • Nickel is often used for plating a printed circuit or a contact metal because of its good chemical stability and mechanical characteristics although its electric resistivity is comparably higher.
  • Di-Z-ethyl-hexyl sebacate as defined herein includes commercially available material as well as pure material.
  • a contact grease according to the present invention comprises PORBE. It is preferable that the POPBE has 4 to 50 average mols of propylene oxide (PD) group.
  • PD propylene oxide
  • the POP-BE with less than 4 mols of PO group results in contact grease which has poor antiwearing property, and higher than 50 mols results in contact grease which also has poor antiwearing property.
  • the antiwearing property is also poor.
  • the contact grease according to the present invention also comprises an amino compound as an antioxidant, i.e. at least one member selected from the group consisting of N,N'-di-sec-butyl-paraphenylene diamine, N,N,N,N'- tetramethyl-4,4'-diamino diphenyl methane (tetra base) and N-phenyl-u-naphthyl amine.
  • an amino compound as an antioxidant i.e. at least one member selected from the group consisting of N,N'-di-sec-butyl-paraphenylene diamine, N,N,N,N'- tetramethyl-4,4'-diamino diphenyl methane (tetra base) and N-phenyl-u-naphthyl amine.
  • the amino compound as an antioxidant not only serves to prevent the POPBE from oxidation, but at the same time decreases the wear of contact metals and stabilizes the contact resistance.
  • the contact grease according to the present invention also comprises lithium stearate.
  • the lithium stearate defined herein includes commercially available material as well as pure material.
  • the lithium stearate When the lithium stearate is present in an amount lower than 9 percent by weight, the grease has poor physical stability. When that amount is higher than 18 percent by weight, the antiwearing property becomes poorer.
  • the contact grease according to the present invention is preferably added with other additives, such as a rust inhibitor, an antisulphurizing agent, etc.
  • a mixture of the di-Z-ethyl-hexyl sebacate, POPBE, amino compound and lithium stearate with or without rust inhibitor and antisulphurizing agent is heated at 2l0230 C. to form a homogeneous liquid.
  • the mixture is cooled rapidly, milled by a conventional method, and is subjected to a reduced pressure so as to remove air and foam.
  • the resulting greases are smooth and buttery in texture and have excellent mechanical and thermal stability.
  • Example 1 A mixture of 86.2 g. of di-Z-ethyl-hexyl sebacate, 1.0 g. of POPB E having 5.0 mols of PO groups, 0.3 g. of tetra base and 12.5 g. of lithium stearate is heated at about
  • Example 2 A mixture of 77.3 g. of di-Z-ethyl-hexyl sebacate, 8.2 g. of POPBE having 15.2 mols of PO group, 1.0 g. of N,N'-di-sec-butyl-paraphenylene diamine and 13.5 g. of lithium stearate is heated at 215 C.
  • Example 1 The resulting mixture is treated in a way similar to that of Example 1.
  • the test is carried out similarly to Example 1 and the test results are shown in Table 1 and in the Figure.
  • Example 3 A mixture of 78.5 g. of di-Z-ethyl-hexyl sebacate, 5.5 g. of POPBE having 47.5 mols of PO group, 1.8 g. of tetra base and 14.2 g. of lithium stearate is heated at 220 C.
  • Example 1 The resulting mixture is treated in a way similar to that of Example 1.
  • the test is carried out similarly to Example 1 and the test results are shown in Table 1 and in the Figure.
  • Example 4 A mixture of 48.7 g. of di-Z-ethyl-hexyl sebacate, 38.5 g. of POPBE having 23.0 mols of PO group, 1.5 g. of N,N'-di-sec-butyl paraphenylene diamine and 11.3 g. of lithium stearate is heated at 230 C.
  • Example 1 The resulting mixture is treated in a way similar to that of Example 1.
  • the test is carried out similarly to Example 1 and the testing result is shown in Table 1 and in the Figure.
  • Example 5 A mixture of 65.0 g. of di-2-ethyl-hexyl sebacate, 21.0 g. of PO-PBE having 35.2 mols of PO group, 3.5 g. of N- phenyl-a-naphthyl amine and 10.5 g. of lithium stearate is heated at 210 C.
  • Example 1 The resulting mixture is treated in a way similar to that of Example 1.
  • the test is carried out similarly to Example 1 and the test results are shown in Table 1 and in the Figure.
  • Table 1 shows the testing results of antiwearing property of the grease of Examples 1 to 5 and a commercially available conventional grease for comparison.
  • the greases were applied to the sliding contact which comprises a combination of a movable contact rivet and fixed contact plate.
  • the material used for the fixed contact plate is nickel.
  • the radius of curvature of the top of the movable contact rivet is 2 mm.
  • the rivet is made of at least one member selected from the group consisting of platinum, gold, silver, copper and their alloys.
  • the wear of the contact rivet was measured as the decreased thickness of the top of the rivet after 50 thousand times of sliding action with sliding speed of 8 cm./ sec. and sliding distance of 4 cm.
  • the difference between the contact resistance before and after sliding action should not be large in order to be used effectively for electric contact.
  • the grease according to the present invention provides an electric contact having a stable contact resistivity, with complete prevention of noise generation and with lengthening the life of the electric contact.
  • Example 1 0.032 2---" Example 2..-.-. 0.027 3
  • Example3 0.024 4
  • Example 4 0.020 5-.
  • Example 5 0.022 6--.. Silicone grease-.. 0.060 0. 007 Ag 0.052 Ag-Cu (-10) 0. 01s 90 Au-Ag-Pt(69-216) 0 017 90 Nickel, sllver 0.014
  • An electric contact grease consisting essentially of:

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
US00346794A 1972-05-25 1973-04-02 Electric contact grease Expired - Lifetime US3822208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5224272A JPS5340704B2 (enrdf_load_stackoverflow) 1972-05-25 1972-05-25

Publications (1)

Publication Number Publication Date
US3822208A true US3822208A (en) 1974-07-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00346794A Expired - Lifetime US3822208A (en) 1972-05-25 1973-04-02 Electric contact grease

Country Status (5)

Country Link
US (1) US3822208A (enrdf_load_stackoverflow)
JP (1) JPS5340704B2 (enrdf_load_stackoverflow)
CA (1) CA966113A (enrdf_load_stackoverflow)
FR (1) FR2185676B1 (enrdf_load_stackoverflow)
GB (1) GB1371470A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812245A (en) * 1984-06-11 1989-03-14 The Dow Chemical Company Intercalations of crystalline lithium aluminates

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5232614A (en) * 1989-02-23 1993-08-03 Exxon Chemical Patents Inc. Lubricating oil compositions and additives for use therein

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719123A (en) * 1953-06-18 1955-09-27 Robert L Merker Fluid compositions containing a cyclopolysiloxane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812245A (en) * 1984-06-11 1989-03-14 The Dow Chemical Company Intercalations of crystalline lithium aluminates
US4910246A (en) * 1984-06-11 1990-03-20 The Dow Chemical Company Intercalations of crystalline lithium aluminates

Also Published As

Publication number Publication date
DE2320994A1 (de) 1973-12-13
JPS497659A (enrdf_load_stackoverflow) 1974-01-23
FR2185676A1 (enrdf_load_stackoverflow) 1974-01-04
CA966113A (en) 1975-04-15
GB1371470A (en) 1974-10-23
JPS5340704B2 (enrdf_load_stackoverflow) 1978-10-28
FR2185676B1 (enrdf_load_stackoverflow) 1978-06-30
DE2320994B2 (de) 1975-09-04

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