EP0186188B1 - Schmierstoff für Wasserarmaturen, wie Wasserhähne und dergleichen - Google Patents

Schmierstoff für Wasserarmaturen, wie Wasserhähne und dergleichen Download PDF

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Publication number
EP0186188B1
EP0186188B1 EP85116505A EP85116505A EP0186188B1 EP 0186188 B1 EP0186188 B1 EP 0186188B1 EP 85116505 A EP85116505 A EP 85116505A EP 85116505 A EP85116505 A EP 85116505A EP 0186188 B1 EP0186188 B1 EP 0186188B1
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EP
European Patent Office
Prior art keywords
acid
lubricant
additive component
water
lubricant according
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
Application number
EP85116505A
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German (de)
English (en)
French (fr)
Other versions
EP0186188A3 (en
EP0186188A2 (de
Inventor
Ulrich Fahl
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.)
Dow Silicones Deutschland GmbH
Original Assignee
Dow Corning GmbH
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Filing date
Publication date
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Publication of EP0186188A2 publication Critical patent/EP0186188A2/de
Publication of EP0186188A3 publication Critical patent/EP0186188A3/de
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Publication of EP0186188B1 publication Critical patent/EP0186188B1/de
Expired legal-status Critical Current

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    • C10M169/00Lubricating 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
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    • C10M2201/085Phosphorus oxides, acids or salts
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    • C10M2203/10Petroleum or coal fractions, e.g. tars, solvents, bitumen
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    • C10N2040/44Super vacuum or supercritical use
    • 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
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/50Medical uses

Definitions

  • the moving parts from the water supply sector namely of so-called water fittings, such as taps, water pumps, water level monitors, water slides and other water shut-off devices or termostat valves in the household and in the industry, which are made of metal, such as brass, or ceramic, such as Alumina ceramics, must be treated with special lubricants to maintain their functionality, namely mobility and tightness of their sliding surfaces.
  • Various lubricants are already available for this purpose. They consist essentially of a natural or synthetic highly viscous lubricating oil or grease, which usually contains a thickener to further increase its consistency.
  • Such lubricants are, for example, the valve and damping greases from Klüber Lubrication Kunststoff KG, Kunststoff, marketed under the name UNISILIKON L silicone greases. These consist of a highly viscous dimethylsiloxane as a lubricating oil and a finely divided polytetrafluoroethylene as a thickener.
  • the UNISILIKON L 641 contains 80 percent by weight of a dimethylpolysiloxane with a viscosity of 60,000 mm 2 sec- 1 and 20 percent by weight of powdered polytetrafluoroethylene with a melting point of about 330 ° C, a melt viscosity at 380 ° C of about 10 Pa-sec, a density of about 2.2 and an average particle size of about 1 to 6 Il m.
  • these UNISILIKON L silicone greases reference is made, for example, to pages 6 and 7 of the Klüber prospectus with the identifier 02.11.2 d.
  • DOW CORNING FS-3452 sealing grease which contains a highly viscous fluorosilicone oil as a lubricating oil and a polytetrafluoroethylene of the type already described as a thickening agent and is described, for example, in brochure 71-114-03 from Dow Corning GmbH, Kunststoff .
  • lubricants for water fittings also based on highly viscous dimethylpolysiloxanes, which are thickened with highly disperse silicon dioxide, such as MOLYKOTE 111 COMPOUND and DOW CORNING VALVE SEAL, which are described, for example, in the leaflets 22-063B-03 and 22-208-03 from Dow Corning GmbH, Kunststoff.
  • Comparable lubricants for water fittings are also based on natural, highly viscous lubricating oils, which are also mixed with conventional organic or inorganic thickeners to increase their consistency.
  • Such lubricants are, for example, the valve greases and tap greases MOLYKOTE 1011 and 1001, which contain a paraffin oil (Paraffinum subliquidum 210 - extra heavy) and bentonite as a thickening agent as lubricating oil and are described, for example, in leaflet 71-119-03 from Dow Corning GmbH, Kunststoff .
  • the object of the invention is therefore to provide a new lubricant for water fittings, such as taps and the like, which maintains its effectiveness compared to the known lubricants much longer, since the formation of deposits, in particular in the form of lime and rust, on the contact surfaces of the lubricated Movable parts of such fittings is inhibited to a high degree, so that such fittings have a much longer functionality.
  • the lubricant for water fittings resulting from the patent claims which differs from the known lubricants of this type essentially in that it contains as additive (a) at least one complexing agent and (b) optionally at least one hydrophobizing agent.
  • the lubricant according to the invention is distinguished from the known lubricants for water fittings with comparable lubrication performance, above all in that its lubricity is retained for a considerably longer time, since the disturbing formation of deposits, in particular in the form of lime and rust, is blocked for a long time with this lubricant.
  • the fittings treated with this therefore remain functional for a relatively long time.
  • the lubricant according to the invention is, of course, preferably designed with regard to the various constituents contained in it in such a way that it corresponds to the respective food law regulations, since it is intended to be used primarily for water fittings, such as taps and the like. For its composition, therefore, all those components that do not meet this condition are normally excluded.
  • the predominant constituent of the lubricant according to the invention is, of course, a natural or synthetic, highly viscous lubricating oil or grease, which is already used in the known lubricants of this type, and which is in each case present in such an amount that, together with the other constituents, a total amount of 100% results. If, in addition to the lubricating oil or grease, the lubricant according to the invention only contains, for example, only the complexing agent (a), the proportion of lubricating oil or grease can for example, even make up 97 to 99.7 percent by weight.
  • the proportion of lubricating oil or grease decreases accordingly, so that it can be present in an amount of, for example, 85 to 97.7 percent by weight. If a thickener is also present in the lubricant according to the invention, which applies to an increased extent particularly when a lubricating oil is used, the above-mentioned amounts of lubricating oil or grease naturally decrease in accordance with the content of thickening agent.
  • suitable lubricating oils or greases are, for example, highly viscous mineral oils, synthetic hydrocarbon oils, aliphatic or aromatic polyethers, fluorinated polyethers, silicones or flourished silicones.
  • the viscosity of such lubricating oils or greases is generally between about 40,000 and 150,000 mm 2. sec- 1 at 25 ° C, with dimethylpolysiloxanes with viscosities in this range being particularly preferred.
  • lubricating oils or lubricating greases based on mineral oils can also be used, namely, for example, white oils with a viscosity in this range, such as medium-heavy, heavy and extra-heavy paraffin oils.
  • the lubricant according to the invention either contains no thickener at all or a certain amount of a conventional organic or inorganic thickener.
  • the amount of thickener present can therefore range up to about 40 percent by weight, and is preferably about 5 to 30 percent by weight, especially 10 to 20 percent by weight, of the total lubricant.
  • thickener to be used is known to the person skilled in the art, and this includes, for example, metal soaps, metal complex soaps, polyureas, terephthalamates, plastic powders of all kinds, such as polyamide powder, polytetrafluoroethylene powder or polyfluoroethylene propylene powder as organic thickeners or highly disperse silicon dioxide, bentonite, inorganic thickener and montmorillonite, as montmorillonite .
  • the component which is primarily responsible for the particular mode of action of the lubricant according to the invention is additive (a), which is at least a complexing agent.
  • additive (a) which is at least a complexing agent.
  • This component ensures that the ions that otherwise lead to deposits do not result in any precipitation, since they are bound to the complex.
  • a complexing agent is preferably used which is relatively sparingly water-soluble, so that it is consumed only slowly over the course of time and has a lasting effect, in particular using a complexing agent which is primarily capable of binding calcium ions and iron ions. Mixtures of different types of complexing agents can of course also be used.
  • the amount of complexing agent in the lubricant of the present invention is generally 0.3 to 3 percent by weight, and is preferably 0.5 to 1.5 percent by weight.
  • the amount of the hydrophobicizing agent used as additive (b) can accordingly generally be 0 to 15 percent by weight, and preferably 3 to 10 percent by weight, again based on the total weight of the individual components present in the lubricant according to the invention.
  • silicone-based water repellents must also be used primarily, and examples of such water repellents are methyl silicone resins, methylphenyl silicone resins, silicone alkyd resins, condensation products from polysiloxanes and polyesters or polyepoxides, polysiloxane resins or vinyl groups or silane groups with allyl groups .
  • the lubricating oils or lubricating greases present in the lubricant according to the invention are not silicone-based, so that they represent corresponding natural or synthetic lubricating oils or lubricating greases, such as mineral oils, synthetic hydrocarbons, aliphatic or aromatic polyether or fluorinated polyethers, then the additive serving as a water repellent is (b) preferably a tall oil resin or an alkyd resin.
  • the lubricant according to the invention is particularly suitable as Lubricant for water fittings, such as taps and the like, and it is preferably used for corresponding fittings made of ceramic, such as, for example, made of aluminum oxide ceramic. In addition to the desired high lubrication and tightness, it also gives the fittings treated with them a particularly long service life without premature loss of their functionality.
  • a homogenizer 79 percent by weight of a dimethylpolysiloxane with a viscosity at 25 ° C. of 50,000 mm 2 sec - 1 , 20 percent by weight of a polytetrafluoroethylene (HOSTAFLON TF 9202) and 1% of nitrilotriacetic acid are mixed together.
  • the lubricant obtained in this way looks milky white and is particularly suitable for the lubrication and sealing of water fittings, in particular ceramic fittings.
  • a homogenizer 69 percent by weight of a dimethylpolysiloxane with a viscosity at 25 ° C. of 100,000 mm 2 .sec -1 and 20 percent by weight of polytetrafluoroethylene of the type specified above are mixed together, followed by further mixing 10 percent by weight of a dimethyltrimethylpolysiloxane with a viscosity at 25 ° C from 600 to 1000 mm 2. sec- 1 and 1 weight percent trans-1,2-cyclohexylene-dinitrilotetraacetic acid. A lubricant with a milky white appearance is again obtained.
  • a homogenizer 60 percent by weight of a dimethylpolysiloxane with a viscosity at 25 ° C. of 60,000 mm 2 sec- 1 and 20 percent by weight of a polyfluoroethylene propylene (TL 120) are mixed with one another and then, with further mixing, 10 percent by weight of a methylphenylpolysiloxane with a viscosity are added 25 ° C of 5000 mm 2 ⁇ sec -1 and 10 weight percent vinylbenzyltrimethylammonium polymer, which in turn leads to a milky white lubricant.
  • TL 120 polyfluoroethylene propylene
  • the milky white lubricant obtained in this way shows a resting penetration mm / 10 (50 g cone) from 330 to 350, a water resistance according to DIN 51807 at 5 h / 90 ° C from 0 and a dynamic toughness at 200 sec- 1 of 33,000 mm 2 ⁇ sec -1 (20 ° C), 29,000 mm 2 ⁇ sec -1 (40 ° C) and 25,000 mm 2 ⁇ sec -1 (60 ° C).
  • the theoretical temperature range of this lubricant ranges from -40 ° C to + 200 ° C.
  • a homogenizer 79 percent by weight of a dimethylpolysiloxane with a viscosity at 25 ° C. of 60,000 mm 2 sec- 1 and 20 percent by weight of polytetrafluoroethylene are mixed with one another, and the mixture obtained is then mixed with 1 percent by weight of ethylenediaminetetraacetic acid, resulting in a lubricant milky white appearance.
  • a white oil (Paraffinum subliquidum 210) are mixed with 10% by weight of aluminum stearate benzoate complex in a homogenizer, and 5% by weight of a tall oil resin (40%) and 2% by weight of nitrilotriacetic acid are then added with further mixing. A somewhat yellowish-looking lubricant is obtained.
  • a homogenizer 80 percent by weight of a dimethylpolysiloxane with a viscosity at 25 ° C of 60,000 mm 2 sec- 1 is mixed with 20 percent by weight of a polytetrafluoroethylene, resulting in a conventional valve and damping grease, which is sold under the trade name UNISILIKON L 641 known silicone grease from Klüber Lubrication Ober KG.
  • the water fitting from Rokal with the designation Karibik 2000 (article no. 017005) is used, in which two perforated ceramic discs control the water flow and the mixing temperature.
  • This faucet is a so-called single-lever washbasin with a smooth body.
  • the test bench works with 19 radial and 21 axial cycles per minute.
  • Example 4 content of lubricating oil + thickener + complexing agent
  • Example 5 content of lubricating oil + thickening agent + complexing agent + hydrophobizing agent
  • Example 7 content of lubricating oil + thickening agent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
EP85116505A 1984-12-24 1985-12-23 Schmierstoff für Wasserarmaturen, wie Wasserhähne und dergleichen Expired EP0186188B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3447346 1984-12-24
DE19843447346 DE3447346A1 (de) 1984-12-24 1984-12-24 Schmierstoff fuer wasserarmaturen, wie wasserhaehne und dergleichen

Publications (3)

Publication Number Publication Date
EP0186188A2 EP0186188A2 (de) 1986-07-02
EP0186188A3 EP0186188A3 (en) 1987-10-07
EP0186188B1 true EP0186188B1 (de) 1989-08-23

Family

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EP85116505A Expired EP0186188B1 (de) 1984-12-24 1985-12-23 Schmierstoff für Wasserarmaturen, wie Wasserhähne und dergleichen

Country Status (5)

Country Link
US (1) US4784795A (enExample)
EP (1) EP0186188B1 (enExample)
JP (1) JPS61159493A (enExample)
CA (1) CA1250279A (enExample)
DE (2) DE3447346A1 (enExample)

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US5154840A (en) * 1992-01-06 1992-10-13 Lyondell Petrochemical Company Environmentally friendly grease compositions
RU2181372C1 (ru) * 2001-06-13 2002-04-20 Демченко Алексей Игнатьевич Уплотнительная смазка для запорной арматуры трубопроводов
US20060201600A1 (en) * 2003-01-17 2006-09-14 Kollin Edward B Lubricants for run-flat tire systems
US7040367B2 (en) * 2003-01-17 2006-05-09 Kollin Edward B Lubricants for run-flat tire systems
US7462661B2 (en) * 2005-07-19 2008-12-09 Xerox Corporation Release fluid additives
ITMI20060568A1 (it) * 2006-03-27 2007-09-28 Nuova Osmo S N C Procedimento per ridurre l'adesione del calcare a componenti di rubinetteria particolarmente per impianti igienico-sanitari
WO2018005535A1 (en) * 2016-06-27 2018-01-04 William Marsh Rice University Fluorine and hydrogen-based adhesive compositions and methods of making the same
US11760952B2 (en) 2021-01-12 2023-09-19 Ingevity South Carolina, Llc Lubricant thickener systems from modified tall oil fatty acids, lubricating compositions, and associated methods
CN113717529A (zh) * 2021-08-25 2021-11-30 广州汇纳新材料科技有限公司 一种导热系数渐增式导热硅脂及其制备方法
DE102021130746A1 (de) 2021-11-24 2023-05-25 Klüber Lubrication München Se & Co. Kg Schmierfett
CN118703247B (zh) * 2024-05-24 2024-12-13 深圳市超润达科技有限公司 密封润滑脂组合物及其制备方法

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Also Published As

Publication number Publication date
EP0186188A3 (en) 1987-10-07
CA1250279A (en) 1989-02-21
DE3447346A1 (de) 1986-06-26
JPS61159493A (ja) 1986-07-19
JPH0412919B2 (enExample) 1992-03-06
DE3447346C2 (enExample) 1989-09-14
DE3572508D1 (en) 1989-09-28
EP0186188A2 (de) 1986-07-02
US4784795A (en) 1988-11-15

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