NO136716B - - Google Patents

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Publication number
NO136716B
NO136716B NO1203/73A NO120373A NO136716B NO 136716 B NO136716 B NO 136716B NO 1203/73 A NO1203/73 A NO 1203/73A NO 120373 A NO120373 A NO 120373A NO 136716 B NO136716 B NO 136716B
Authority
NO
Norway
Prior art keywords
lubricant
particles
present
dry
metal
Prior art date
Application number
NO1203/73A
Other languages
Norwegian (no)
Other versions
NO136716C (en
Inventor
Ralph James Hovey
Afsar Ali Kahn
Original Assignee
Bunker Ramo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bunker Ramo filed Critical Bunker Ramo
Priority to NO731203A priority Critical patent/NO136716C/en
Publication of NO136716B publication Critical patent/NO136716B/no
Publication of NO136716C publication Critical patent/NO136716C/en

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Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B31/00Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/08Lubrication
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M7/00Solid 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
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D15/02Combined electrolytic and electrophoretic processes with charged materials
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04Elements
    • C10M2201/05Metals; Alloys
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06Metal compounds
    • C10M2201/065Sulfides; Selenides; Tellurides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06Metal compounds
    • C10M2201/065Sulfides; Selenides; Tellurides
    • C10M2201/066Molybdenum sulfide
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2211/00Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06Perfluorinated compounds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/02Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06Perfluoro polymers
    • C10M2213/062Polytetrafluoroethylene [PTFE]
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/02Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/02Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/028Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/06Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2227/00Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/04Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions having a silicon-to-carbon bond, e.g. organo-silanes
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00Form in which the lubricant is applied to the material being lubricated
    • C10N2050/08Solids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10Semi-solids; greasy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/1266O, S, or organic compound in metal component

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Electroplating Methods And Accessories (AREA)

Description

Foreliggende oppfinnelse vedrører et tørt smøremiddel og er kjennetegnet ved at det består av findelte partikler med en partikkeldiameter på 0,05-0,5 mikron, av en fluorhydrokarbonpolymer dispergert i kobber, gull, sølv eller nikkel. The present invention relates to a dry lubricant and is characterized by the fact that it consists of finely divided particles with a particle diameter of 0.05-0.5 microns, of a fluorohydrocarbon polymer dispersed in copper, gold, silver or nickel.

Det er ifølge oppfinnelsen foretrukket at fluorhydrokarbonpolymeren er polytetrafluoreten. According to the invention, it is preferred that the fluorohydrocarbon polymer is polytetrafluoroethylene.

Hittil, når tørre smøremidler, pulvere, vokser og flytende smøremidler anbringes på en overflate, blir partiklene og væsken, i stedet for å klebe seg godt til overflaten, i de fleste tilfeller og i stor utstrekning fjernet etter den første avtørking. Heretofore, when dry lubricants, powders, waxes and liquid lubricants are applied to a surface, the particles and liquid, instead of adhering well to the surface, are in most cases largely removed after the initial wiping.

Ifølge foreliggende oppfinnelse tilveiebringes et tørt smøremiddel som tillater kontroll av hvordan og hvor smøremidlet er tilstede og av hvor meget smøremiddel som finnes på overflaten til enhver tid. According to the present invention, a dry lubricant is provided which allows control of how and where the lubricant is present and of how much lubricant is present on the surface at any time.

Ved hjelp av det tørre smøremiddel ifølge foreliggende oppfinnelse oppnås et smøremiddelbelegg som tilfører smøremidlet etterhvert som basismaterialet slites, dvs. f.eks. et lager med overlegne smøremiddelegenskaper. With the aid of the dry lubricant according to the present invention, a lubricant coating is obtained which adds the lubricant as the base material wears, i.e. e.g. a bearing with superior lubricant properties.

Smøremidlet ifølge oppfinnelsen muliggjør også en "målbestilling" av en lageroverflate for å tilfredsstille spesi-fike krav. The lubricant according to the invention also enables a "target order" of a bearing surface to satisfy specific requirements.

Fra norsk patent nr. 127.304 er det kjent en frem-gangsmåte til fremstilling av en glideflate, f.eks. en lager-overf late, belagt med en sammensetning hovedsakelig bestående av findelte partikler av et fast smøremiddel dispergert i et metall. Ifølge fremgangsmåten utfelles således negativt ladede partikler med smøremiddelegenskaper elektroforetisk på en basis(lageroverflate) hovedsakelig samtidig med den elektro-lytiske utfellingen av et metall, slik som kobber, gull, sølv eller nikkel. Denne samutfelling oppnås ved periodisk å reversere polariteten til gjenstanden som skal belegges, hvor-ved, dersom man antar at gjenstanden først gjøres til katode, metallet først vil utfelles, deretter, ved reversering av polariteten slik at gjenstanden danner en anode, vil de negativt ladede smøremiddelpartikler utfelles osv. ved hjelp av periodiske reverseringer, inntil et sjikt av ønsket tykkelse oppnås. From Norwegian patent no. 127,304, a method for producing a sliding surface is known, e.g. a bearing surface coated with a composition consisting mainly of finely divided particles of a solid lubricant dispersed in a metal. According to the method, negatively charged particles with lubricant properties are thus deposited electrophoretically on a base (bearing surface) essentially simultaneously with the electrolytic precipitation of a metal, such as copper, gold, silver or nickel. This coprecipitation is achieved by periodically reversing the polarity of the object to be coated, whereby, assuming that the object is first made a cathode, the metal will first precipitate, then, by reversing the polarity so that the object forms an anode, the negatively charged lubricant particles are precipitated, etc. by means of periodic reversals, until a layer of the desired thickness is obtained.

Partiklene utfelles som et tynt sjikt av findelte partikler med 0,05 - 0,5 mikron diameter og metallet utfelles som et kontinuerlig tynt lag eller sjikt over og del-vis omkring partiklene slik at sluttresultatet med flerlags-utfellingen i alt vesentlig er en homogen dispersjon av partikler i metall. The particles are deposited as a thin layer of finely divided particles with a diameter of 0.05 - 0.5 microns and the metal is deposited as a continuous thin layer or layer above and partly around the particles so that the end result of the multi-layer deposition is essentially a homogeneous dispersion of metal particles.

Smøremiddelpartiklene ifølge foreliggende oppfinnelse består av fluorhydrokarbonpolymerer, fortrinnsvis polytetrafluoreten; foretrukne fluorhydrokarboner resp. fluorhydrokarbonpolymerer er de som er helt fluorerte, og det beste av disse er, sett fra synspunktet med lav friksjonskoeffisient, polytetrafluoreten. Dette materiale, med varebetegnelsen "TEFLOnC^)" finnes i handelen i form av negativt ladede partikler i en vannholdig væske. The lubricant particles according to the present invention consist of fluorohydrocarbon polymers, preferably polytetrafluoroethylene; preferred fluorohydrocarbons or fluorohydrocarbon polymers are those that are fully fluorinated, and the best of these, from a low friction coefficient point of view, is polytetrafluoroethylene. This material, with the trade name "TEFLOnC^)" is commercially available in the form of negatively charged particles in an aqueous liquid.

Smøremiddelsammensetningene kan anbringes på en hvilken som helst overflate, f.eks. overflater hos keramiske materialer, metaller, osv. The lubricant compositions can be applied to any surface, e.g. surfaces of ceramic materials, metals, etc.

De behandlede overflater kan anvendes til lager, inkludert lager i klokker; elektriske kontakter, hardbelagte verktøyoverflater og som et tørt smøremiddel anbragt på karosserier henholdsvis kapsler for militære kjøretøyer henholdsvis romfartøyer. The treated surfaces can be used for bearings, including bearings in watches; electrical contacts, hard-coated tool surfaces and as a dry lubricant applied to car bodies and capsules for military vehicles and spacecraft respectively.

De med smøremidlet ifølge oppfinnelsen behandlede deler oppviser lav friksjon og øket slitasjebestandighet. The parts treated with the lubricant according to the invention exhibit low friction and increased wear resistance.

Beleggene gir konstante trykkrefter ved innføring og utføring av kontaktorganer i elektriske kontaktorer og beleggene oppviser en lav elektrisk motstand og dermed oppnår kontaktorganene en øket slitasjebestandighet. The coatings provide constant pressure forces when inserting and removing contact elements in electrical contactors and the coatings exhibit a low electrical resistance and thus the contact elements achieve increased wear resistance.

Beleggene kan ha en hvilken som helst tykkelse, men vanligvis har det sammensatte sjikt en totaltykkelse på omkring 0,0025 mm for tilfredsstillende resultater som smøremiddel. The coatings can be of any thickness, but usually the composite layer has a total thickness of about 0.0025 mm for satisfactory results as a lubricant.

Claims (2)

1. Tørt smøremiddel, karakterisert ved at det består av findelte partikler med en partikkeldiameter på 0,05-0,5 mikron, av en fluorhydrokarbonpolymer dispergert i kobber, gull, sølv eller nikkel.1. Dry lubricant, characterized in that it consists of finely divided particles with a particle diameter of 0.05-0.5 microns, of a fluorohydrocarbon polymer dispersed in copper, gold, silver or nickel. 2. Tørt smøremiddel ifølge krav 1, karakterisert ved at fluorhydrokarbonpolymeren er polytetrafluoreten .2. Dry lubricant according to claim 1, characterized in that the fluorohydrocarbon polymer is polytetrafluoroethylene.
NO731203A 1966-01-13 1973-03-23 DRY LUBRICANT CONCERNING FINDING PARTICLES OF A FLUORHYDROCARBON POLYMER DISPERGED IN A METAL NO136716C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO731203A NO136716C (en) 1966-01-13 1973-03-23 DRY LUBRICANT CONCERNING FINDING PARTICLES OF A FLUORHYDROCARBON POLYMER DISPERGED IN A METAL

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US52035966A 1966-01-13 1966-01-13
NO00166306A NO127304B (en) 1966-01-13 1967-01-07
US2442470A 1970-04-03 1970-04-03
NO731203A NO136716C (en) 1966-01-13 1973-03-23 DRY LUBRICANT CONCERNING FINDING PARTICLES OF A FLUORHYDROCARBON POLYMER DISPERGED IN A METAL

Publications (2)

Publication Number Publication Date
NO136716B true NO136716B (en) 1977-07-18
NO136716C NO136716C (en) 1977-10-26

Family

ID=26698428

Family Applications (2)

Application Number Title Priority Date Filing Date
NO00166306A NO127304B (en) 1966-01-13 1967-01-07
NO731203A NO136716C (en) 1966-01-13 1973-03-23 DRY LUBRICANT CONCERNING FINDING PARTICLES OF A FLUORHYDROCARBON POLYMER DISPERGED IN A METAL

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NO00166306A NO127304B (en) 1966-01-13 1967-01-07

Country Status (11)

Country Link
US (1) US3582481A (en)
AT (1) AT293583B (en)
CH (1) CH466664A (en)
DE (1) DE1621793C3 (en)
DK (1) DK137961C (en)
FR (1) FR1510284A (en)
GB (1) GB1178741A (en)
IL (1) IL27166A (en)
LU (1) LU52780A1 (en)
NO (2) NO127304B (en)
SE (2) SE332478B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT312317B (en) * 1971-03-25 1973-12-27 Plansee Metallwerk Wear-resistant coatings for machine parts
US3787338A (en) * 1972-02-25 1974-01-22 Gen Electric Aqueous dispersions of finely divided lubricants in polyamide acid
JPS5315011B2 (en) * 1972-06-03 1978-05-22
US4318792A (en) * 1980-07-07 1982-03-09 Trw Inc. Process for depositing forging lubricant on titanium workpiece
GB2221224A (en) * 1988-07-06 1990-01-31 Ici Plc Simultaneous electrodeposition of metal and film-forming polymer from a single bath
JPH0324297A (en) * 1989-06-22 1991-02-01 Nkk Corp Composite plating film having superior releasability
US20060024511A1 (en) * 2004-07-29 2006-02-02 Joseph Elmer Electro-coat adhesion layer with a siloxane top coat
WO2006082179A1 (en) * 2005-02-04 2006-08-10 Siemens Aktiengesellschaft Surface with a wettability-reducing microstructure and method for the production thereof
EP2103719A1 (en) * 2008-03-18 2009-09-23 Technical University of Denmark A method for producing a multilayer structure
WO2016130656A1 (en) 2015-02-10 2016-08-18 Valspar Sourcing, Inc. Novel electrodeposition system

Also Published As

Publication number Publication date
FR1510284A (en) 1968-01-19
AT293583B (en) 1971-10-11
SE332478B (en) 1971-02-08
CH466664A (en) 1968-12-15
DE1621793B2 (en) 1978-06-08
US3582481A (en) 1971-06-01
SE365533B (en) 1974-03-25
NO127304B (en) 1973-06-04
NO136716C (en) 1977-10-26
DK137961C (en) 1978-11-06
DK137961B (en) 1978-06-12
LU52780A1 (en) 1968-09-03
DE1621793C3 (en) 1979-02-08
IL27166A (en) 1971-01-28
GB1178741A (en) 1970-01-21
DE1621793A1 (en) 1971-07-08

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