Classifications

• • 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
  • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
  • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
  • C10M105/10—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M105/14—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms polyhydroxy
• • 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
  • C10M173/00—Lubricating compositions containing more than 10% water
  • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
• • G—PHYSICS
  • G04—HOROLOGY
  • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
  • G04B15/00—Escapements
  • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
• • G—PHYSICS
  • G04—HOROLOGY
  • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
  • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
  • G04B31/08—Lubrication
• • 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
  • C10M2207/02—Hydroxy compounds
  • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
• • 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
  • C10M2207/02—Hydroxy compounds
  • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
  • C10M2207/0225—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups used as base material
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• • 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
  • C10N2040/06—Instruments or other precision apparatus, e.g. damping fluids

Definitions

• the present invention relates to a watch, in particular to a mechanical watch, of which at least some of the moving parts are lubricated by agents with a very low coefficient of friction.
• the lubrication is ensured between the parts in relative motion, generally steel and ruby, by oils well known in the technical field considered, which produce low coefficients of friction, for example ⁇ 0.1 at the temperature of 23 ° C.
• oils well known in the technical field considered, which produce low coefficients of friction, for example ⁇ 0.1 at the temperature of 23 ° C.
• PAO polyalphaolefin
• Such a watch includes a first relatively sliding piece on a second piece, the first piece being formed of oxide or having an oxide layer on the surface, the sliding surface having a chemical affinity with hydrophilic groups, as well as, on the sliding surface of the first part, at least one compound containing one or more hydrophilic groups chosen from C 3 -C 8 polyols having at least one-third of -OH groups relative to the number of carbon atoms.
• This compound may be a mixture and may contain, for example, another substance containing hydrophilic groups, such as water.
• the C 3 -C 8 polyol may be chosen for example from the group comprising glycerol (C 3 H 8 O 3 ), propylene glycol (C 3 H 8 O 2 ), diethylene glycol (C 4 H 10 O 3 ) , 1,6-hexanediol (C 6 H 14 O 2 ), 1,2,6-hexanetriol (C 6 H 14 O 3 ), triethylene glycol (C 6 H 14 O 4 ), diglycerol (C 6 H 14 O 5 ), triglycerol (C 9 H 20 O 7 ), triethanolamine (C 6 H 15 NO 3 ).
• the carbon chain of the polyol may comprise O or N.
• Glycerol is a C 3 alcohol containing 3 -OH groups, propylene glycol a C 3 alcohol containing 2 -OH groups, diethylene glycol a C 4 alcohol comprising 2 -OH groups and 1 O atom in the chain, 1,6-hexanediol, a C 6 alcohol having 2 -OH groups, 1,2,6-hexanetriol, a C 6 alcohol comprising 3 -OH groups, triethylene glycol, a C 6 alcohol comprising 2 -OH groups, and two O atoms in the chain, the diglycerol a C 6 alcohol comprising 4 -OH groups and 1 O atom in the chain, the triglycerol a C 9 alcohol comprising 5 -OH groups and 2 O atoms in the chain and triethanolamine a C 6 alcohol comprising 3 -OH groups and an N atom.
• the second surface may also have a chemical affinity with hydrophilic groups and be, for example formed of oxide or have on the surface an oxide layer, as well as the first surface. It can also be metallic or metal alloy.
• one of the relative sliding parts may be ceramic, in particular alumina or zirconia, more particularly ruby or sapphire
• the other relatively sliding parts may be made of iron, steel, for example steel 20AP , or other alloy of iron, or of brass, aluminum, titanium, cuproberyllium, silicon, nickel, nickel-phosphorus or their alloys.
• the part in question may be a part having a surface coating, obtained for example by galvanic deposition of gold, gold-copper-cadmium and gold, nickel, rhodium, tin-nickel. It may also have an anodized surface, as in the case of aluminum alloy parts or titanium. It can also be modified by a surface treatment such as oxidation, carburization or nitriding. Between the two relatively sliding parts can also be an intermediate layer called "epilame", well known in watchmaking and used to prevent the spreading of lubricants.
• the compound comprising one or more hydrophilic groups is a low molecular weight polyol, for example glycerol or aqueous glycerol.
• This compound acts as a lubricant forming a film or film between the two moving surfaces.
• Examples 1 to 6 indicate the results obtained with aqueous glycerol on various pairs of surfaces, while Examples 7 to 17 give the results obtained with compounds other than glycerol for the same pair of 20AP steel-ruby surfaces.
• the coefficient of friction a standard measure in watchmaking, expresses the dynamic friction and corresponds to the ratio between the tangential force exerted to maintain the relative movement between the two parts and the perpendicular force exerted on them.
• 20AP steel is a hardening carbon steel made of 1% carbon, 0.4% manganese, 0.2% lead, 0.15% silicon, 0.05% sulfur, and iron for the balance.
• the term "epilamed 20AP steel” is intended to denote a 20AP steel on which a conventional epilame has been deposited, in this case that sold under the trademark Fixodrop FK / BS-10 by Moebius et Fils in Allschwil (Switzerland).
• Ruby is a synthetic ruby as commonly used in watchmaking and "85% glycerol" means a liquid composed of glycerol at 85% by weight and 15% by weight of water (mutatis mutandis for Examples 13, 14 and 16). ).
• 941 Oil is a commercial oil manufactured by the same Moebius Company and is a mixture of one alkyl-aryl monooleate and two C 10 -C 13 diesters with anti-wear and extreme pressure additives; its viscosity, measured at 20 ° C., is 100 mm 2 / s.
• PAO + GMO is a mixture of synthetic oils of polyalphaolefin type (PAO D)) having a carbon monoxide content at 20 ° C. of 100 mm 2 / s, and 1% of GMO additive (glycerol monooleate).
• GMO additive glycerol monooleate

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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)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Lubricants (AREA)
• Sliding-Contact Bearings (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (8)

Family Cites Families (8)

• 2007
  • 2007-10-31 EP EP07816221.1A patent/EP2082014B1/de active Active
  • 2007-10-31 WO PCT/CH2007/000538 patent/WO2008052378A2/fr not_active Ceased
  • 2007-10-31 CH CH00525/09A patent/CH698230B1/fr not_active IP Right Cessation

Non-Patent Citations (1)

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