EP0293427B1 - Verfahren zur herstellung einer ptfe-dispersion als schmieröl oder schmierölzusatz - Google Patents

Verfahren zur herstellung einer ptfe-dispersion als schmieröl oder schmierölzusatz Download PDF

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Publication number
EP0293427B1
EP0293427B1 EP87907956A EP87907956A EP0293427B1 EP 0293427 B1 EP0293427 B1 EP 0293427B1 EP 87907956 A EP87907956 A EP 87907956A EP 87907956 A EP87907956 A EP 87907956A EP 0293427 B1 EP0293427 B1 EP 0293427B1
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EP
European Patent Office
Prior art keywords
temperature
ptfe
fact
set forth
zone
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
EP87907956A
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German (de)
English (en)
French (fr)
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EP0293427A1 (de
Inventor
Malte Huth
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.)
HUTH, MARC
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HUTH Marc
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Publication date
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Publication of EP0293427A1 publication Critical patent/EP0293427A1/de
Application granted granted Critical
Publication of EP0293427B1 publication Critical patent/EP0293427B1/de
Anticipated expiration legal-status Critical
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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
    • C10M147/00—Lubricating compositions characterised by the additive being a macromolecular compound containing halogen
    • C10M147/02—Monomer containing carbon, hydrogen and halogen 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/28—Polyoxyalkylenes of alkylene oxides containing 2 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/36—Polyoxyalkylenes etherified
    • 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
    • C10M157/00—Lubricating compositions characterised by the additive being a mixture of two or more macromolecular compounds covered by more than one of the main groups C10M143/00 - C10M155/00, each of these compounds being essential
    • C10M157/02—Lubricating compositions characterised by the additive being a mixture of two or more macromolecular compounds covered by more than one of the main groups C10M143/00 - C10M155/00, each of these compounds being essential at least one of them being a halogen-containing compound
    • 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
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02—Water
    • 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
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two 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
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06—Perfluorinated compounds
    • 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
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/02—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen 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
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • 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
    • C10N2040/02—Bearings
    • 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
    • C10N2040/25—Internal-combustion engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/251—Alcohol fueled engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • C10N2040/28—Rotary engines
    • 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
    • C10N2050/015—Dispersions of solid lubricants
    • C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
    • 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
    • C10N2070/00—Specific manufacturing methods for lubricant compositions
    • C10N2070/02—Concentrating of additives

Definitions

  • the invention relates to a method for producing a PTFE dispersion in oil as a lubricating oil or lubricating oil additive, PTFE in powder form or as an aqueous dispersion in the presence of a nonionic surfactant as an antistatic agent being mixed with a commercially available mineral oil.
  • Dispersions based on polytetrafluoroethylene (PTFE) which are commercially available under the collective term of oil additives are known to have an extremely low coefficient of friction, so that it makes sense to use them as lubricants, e.g. in engine oil or gear oil or to reduce wear on machine guides, in threads or similar applications in which two friction partners are exposed to high loads.
  • PTFE polytetrafluoroethylene
  • Dispersions based on polytetrafluoroethylene (PTFE) which are commercially available under the collective term of oil additives are known to have an extremely low coefficient of friction, so that it makes sense to use them as lubricants, e.g. in engine oil or gear oil or to reduce wear on machine guides, in threads or similar applications in which two friction partners are exposed to high loads.
  • PTFE is naturally anti-adhesive.
  • Ionogenic PTFE dispersions generally have the disadvantage that they can only be installed in media with a corresponding charge, which means a corresponding application limitation. But even if this prerequisite is met, PTFE agglomeration can be expected after a short period of operation in polluting media such as lubricating oils.
  • the present invention has for its object to provide a method of the generic type, which enables the production of a PTFE dispersion in oil, the desired film formation on metallic surfaces can be realized permanently in its lubricating use and wherein it depends on a certain ionization Oil doesn't arrive.
  • This object is achieved in the generic method in that a permanent attachment of the nonionic surfactant to the PTFE particles is achieved by a subsequent heat treatment with several temperature zones, the mixture first a shock zone with maximum temperature and then one or more tempering zones with increasingly lower Flows through temperatures and the maximum temperature corresponds at most to the limit value for the heat resistance of the surfactant.
  • the PTFE particles it is possible to coat the PTFE particles permanently with a net-active substance in the form of a surfactant, so that their static charge is prevented, or at least considerably reduced, which in turn favors their even wetting of the metal surfaces or enables them in the first place.
  • the PTFE particles thus converted into a neutral charge state adhere to the cathodic metal surface, where they form a thin, homogeneous film, which is responsible for a decisive improvement in the friction behavior of the coated metal surface.
  • the described advantageous effects of the lubricating oil or lubricating oil additive produced by the process according to the invention can be traced back to the heat treatment proposed according to the invention, by means of which the surfactant ions are permanently attached to the PTFE particles.
  • the shock zone causes the charge carriers present on the PTFE to be released; this results in wetting of the PTFE, the charge-free particles of which are permanently coated by the addition of the nonionic surfactant.
  • the subsequent tempering zones prevent the surfactant from decomposing with the surprising one Effect of long-term stable neutrality of the mixture on PTFE with the non-ionic surfactant.
  • the heat treatment according to the invention also ensures that the PTFE aglomerates present in the still untreated mixture dissolve. This creates the essential prerequisites for the formation of a homogeneous PTFE film over the metal surfaces to be treated.
  • the dispersion according to the invention is charge-neutral, it can be used equally well with cationic, anionic and nonionic engine oils. Due to the surfactant coating, the PTFE is no longer accessible to external charge carriers; it can neither agglomerate nor settle. Any sediment that may arise can be redispersed by gentle shaking or stirring.
  • nonylphenol polyglycol ether is used as the surfactant.
  • the maximum temperature used in the shock zone is 280 ° C.
  • two to four tempering zones follow the shock zone, the temperature of the last tempering zone being 40-60 ° C.
  • Three tempering zones are expediently provided, the temperatures in the first and second tempering zones being approximately 200 ° C. and 120 ° C.
  • a particularly advantageous embodiment of the method according to the invention is that the mixture flows at ambient temperature into a flow channel in which the temperature zones corresponding to the heat treatment follow one another, and that the flow channel is extended by a calming section exposed to the ambient temperature, which consists of a PTFE tube .
  • a duct piece lined with PTFE can also be used.
  • the maintenance of the electroneutral properties of the mixture is ensured by the PTFE tube, which advantageously represents the outflow for the finished mixture.
  • the PTFE tube is advantageously extended into the flow channel up to a maximum of the first tempering zone.
  • the PTFE tube expediently extends into the middle tempering zone.
  • a particularly simple procedure provides that the temperature zones follow one another closely along a vertical flow channel. This results in relatively low requirements for the design of the apparatus.
  • a flow channel with mutually insulated, separately temperature-controllable sections is sufficient, for example in the configuration present in known extruders.
  • both the flow rate and the dwell times in the upstream flow sections can be influenced in a simple manner.
  • a flow channel 1 which is composed of four sections 2, 3, 4 and 5 from top to bottom.
  • the temperatures of the individual sections can be regulated independently of one another. Between the sections there is in each case an insert 8 made of a heat-insulating material.
  • a PTFE tube 7 is inserted into the flow channel 1 from below, which forms a so-called calming section and opens directly into a filling container (not shown).
  • Devices for heating the individual sections and for regulating the temperature have been omitted in the drawing for the sake of a clear representation.
  • the uppermost section 2 of the flow channel 1 is connected directly to a filling funnel 6, into which the mixture of the PTFE oil dispersion and the surfactant is filled at an ambient temperature TU of approximately 20 ° C.
  • the process can be carried out in batches or in continuous operation. In the context of the invention, a recirculating operation with multiple recirculation of a batch can also be expedient.
  • the individual sections of the flow channel 1 can have approximately the same length, the total length of the flow channel should be approximately one meter or more.
  • the diameter of the flow channel or the PTFE tube should be selected so that the liquid in the individual sections almost assumes the temperature of the respective section. In a specific exemplary embodiment, the diameter D of the flow channel is approximately twice the PTFE tube, the latter approximately 10 mm, with a liquid throughput of 2-5 liters per minute.
  • the uppermost section 2 corresponds to the shock zone ZO with a temperature TO of approximately 280 ° C.
  • the next section 3 forms a first tempering zone Z1 with a temperature T1 of approximately 200 ° C.
  • the following section 4 forms a middle tempering zone Z2 with a temperature T2 of approximately 120 ° C; the bottom section 5 forms the last tempering zone Z3 with a temperature T3 of about 40-60 ° C.
  • the PTFE tube 7 is inserted from below into the flow channel 1, so that it lies sealingly against the inner wall of the last section 5 and in part of the penultimate section 4.
  • the PTFE tube 7 is calibrated in accordance with a certain quantity of liquid.
  • the essential function of the PTFE tube is to avoid contact of the treated liquid with the steel sections of the flow channel 1 in the area of the low temperatures, ie the PTFE particles in the liquid should not be given an opportunity by wetting metal surfaces before Filling into suitable plastic containers with a charge exchange of the metal surface.
  • the PTFE powder admixed as a disperse phase should be as fine as possible; the preferred particle size of the PTFE agglomerates is between 0.1 and 1.0 micrometers. Investigations under the scanning electron microscope have shown a particle size in the range from 0.2 to 0.3 micrometers.
  • the proportions in the dispersion can either be selected so that a finished lubricating oil or only a lubricating oil additive is formed, the latter being an additive concentrate which is diluted with oil before use.
  • a suitable lubricating oil additive is produced by the process according to the invention in such a way that a mineral oil content of 10% by weight is initially introduced; 0.5% by weight of nonylphenol polyglycol ether and then 2% by weight of PTFE are stirred in until a homogeneous paste is formed. The paste is then mixed with a further 87.5% by weight of mineral oil. This liquid mixture is then subjected to the heat treatment process according to the invention.
EP87907956A 1986-12-13 1987-12-02 Verfahren zur herstellung einer ptfe-dispersion als schmieröl oder schmierölzusatz Expired - Lifetime EP0293427B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3642617 1986-12-13
DE3642617A DE3642617C1 (de) 1986-12-13 1986-12-13 Verfahren zur Herstellung einer PTFE-Dispersion als Schmieroel oder Schmieroelzusatz

Publications (2)

Publication Number Publication Date
EP0293427A1 EP0293427A1 (de) 1988-12-07
EP0293427B1 true EP0293427B1 (de) 1990-05-02

Family

ID=6316112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907956A Expired - Lifetime EP0293427B1 (de) 1986-12-13 1987-12-02 Verfahren zur herstellung einer ptfe-dispersion als schmieröl oder schmierölzusatz

Country Status (9)

Country Link
US (1) US4806281A (es)
EP (1) EP0293427B1 (es)
JP (1) JP2527800B2 (es)
AU (1) AU8330587A (es)
BR (1) BR8707580A (es)
CA (1) CA1301145C (es)
DE (2) DE3642617C1 (es)
ES (1) ES2009226A6 (es)
WO (1) WO1988004314A1 (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69228815T2 (de) * 1991-07-05 1999-11-25 Obrecht Brigitte Schmierölzusammensetzung, verfahren zur herstellung und verwendungen davon, besonders als ölzusatz
US5516556A (en) * 1994-09-23 1996-05-14 Baker; Larry J. Composition for and method of treating skate blades and the like
US6036945A (en) 1997-04-11 2000-03-14 Shamrock Technologies, Inc. Delivery systems for active ingredients including sunscreen actives and methods of making same
US5846447A (en) * 1997-08-26 1998-12-08 E. I. Du Pont De Nemours And Company Process for forming a dispersion of polytetrafluoroethylene
US5990054A (en) * 1997-12-31 1999-11-23 Willis; John Dale Method of mixing diethylene glycol and polytetrafluoroethylene
DE102007055927A1 (de) 2007-12-23 2009-06-25 Leibniz-Institut Für Polymerforschung Dresden E.V. Langzeitstabile Öl-PTFE-Dispersion und Verfahren zu ihrer Herstellung
ITRM20090654A1 (it) * 2009-12-11 2011-06-12 Eon Srl Oli lubrificanti per motori diesel funzionanti con oli vegetali
DE102011083076A1 (de) 2011-09-20 2013-03-21 Leibniz-Institut Für Polymerforschung Dresden E.V. Verfahren zur Herstellung stabiler Öl-PTFE-Dispersionen
CN105754689A (zh) * 2016-03-16 2016-07-13 巩俭 一种制动系统保护涂层液

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432511A (en) * 1961-11-07 1969-03-11 Duriron Co Processing of plastic materials
US4127491A (en) * 1976-07-23 1978-11-28 Michael Ebert Hybrid lubricant including halocarbon oil
US4224173A (en) * 1978-06-12 1980-09-23 Michael Ebert Lubricant oil containing polytetrafluoroethylene and fluorochemical surfactant
US4615817A (en) * 1985-05-17 1986-10-07 Mccoy Frederic C Additives containing polytetrafluoroethylene for making stable lubricants

Also Published As

Publication number Publication date
US4806281A (en) 1989-02-21
DE3762524D1 (de) 1990-06-07
JP2527800B2 (ja) 1996-08-28
DE3642617C1 (de) 1988-04-21
WO1988004314A1 (en) 1988-06-16
EP0293427A1 (de) 1988-12-07
AU8330587A (en) 1988-06-30
CA1301145C (en) 1992-05-19
ES2009226A6 (es) 1989-09-16
BR8707580A (pt) 1989-03-14
JPH01501634A (ja) 1989-06-08

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