EP0365413B1 - Dispersions d'halogenures de terres rares en milieu huileux - Google Patents

Dispersions d'halogenures de terres rares en milieu huileux Download PDF

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Publication number
EP0365413B1
EP0365413B1 EP89402850A EP89402850A EP0365413B1 EP 0365413 B1 EP0365413 B1 EP 0365413B1 EP 89402850 A EP89402850 A EP 89402850A EP 89402850 A EP89402850 A EP 89402850A EP 0365413 B1 EP0365413 B1 EP 0365413B1
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Prior art keywords
rare
dispersions
radical
active agent
earth halides
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EP89402850A
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German (de)
English (en)
French (fr)
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EP0365413A1 (fr
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Christian Segaud
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Rhodia Chimie SAS
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Rhone Poulenc Chimie SA
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    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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    • C10M2209/107—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
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Definitions

  • the subject of the present invention is dispersions of rare earth halides in an oily medium and their process of preparation. More specifically, the invention relates to dispersions of rare earth fluorides in an oily medium. The invention also relates to their application in the field of lubrication.
  • Lubricants based on mineral or synthetic oils are the most commonly used. They generally contain various additives: additives improving the viscosity index, additives lowering the pour point, anti-wear and extreme pressure additives, neutralizing additives, oxidation inhibitors, corrosion inhibitors, dispersant and detergent additives, additives anti-foam.
  • rare earth fluorides can be used as extreme pressure additives, preventing direct contact with metal surfaces, under severe operating conditions (seizure).
  • the aim of the present invention is to provide dispersions of rare earth halides in an oily medium intended, in particular, to be incorporated into a conventional lubrication formulation.
  • Another object of the invention is to have dispersions having sufficient stability properties with regard to the envisaged application and generally, stability is required in a temperature range from - 10 ° C to + 45 ° C.
  • the dispersions of rare earth halides in an oily medium are characterized in that they comprise at least one rare earth halide, an oil base and at least one surfactant comprising a hydrophobic part and a hydrophilic part consisting of ethylene oxide and / or propylene oxide units and, optionally, a hydrophilic functional group.
  • rare earth used in accordance with the invention includes the rare earth elements having atomic numbers from 57 to 71 inclusive and the yttrium with atomic number equal to 39.
  • the preferred rare earth elements are ceric rare earths such as lanthanum, cerium, praseodymium, neodymium and samarium. among these, cerium is preferably chosen.
  • rare earth halides there may be mentioned, in particular, chlorides or fluorides: the latter being preferred.
  • the size of the aggregates in the case of a rare earth trifluoride, ranging between 0.05 and 3.0 f..lm with a particle size distribution more or less tightened according to the method of obtaining said fluoride, it is interesting that the oily dispersion of the invention can be obtained from any rare earth fluoride, whatever its particle size.
  • Cerium trifluoride the subject of French patent application FR-A-2,633,603, which has a fine and tight particle size, constitutes a raw material of choice.
  • It has an average diameter of its aggregates varying between 0.1 and 0.5 ⁇ m and preferably between 0.15 and 0.30 ⁇ m: the particle size fraction greater than 1 and 2 ⁇ m being respectively less than 10 and 5% by weight.
  • the monodisperse nature of the size distribution of the aggregates is highlighted by the dispersion index defined by the ratio which is in the range from 0.3 to 0.6 and preferably from 0.3 to 0.45.
  • oil involved in the dispersions of rare earth halides of the invention use may be made of a vegetable, mineral or synthetic oil.
  • vegetable oils examples include rapeseed oil, linseed oil, soybean oil, coconut oil.
  • Mineral oils from petroleum cracking are the oils most often used. They consist of a mixture of a large number of hydrocarbons which can be classified as saturated straight chain hydrocarbons (n-paraffins) or branched (isoparaffins) into alicyclic hydrocarbons, aromatic hydrocarbons.
  • paraffinic oils essentially contain paraffinic and isoparaffinic hydrocarbons, substantially less alicyclic hydrocarbons and very little aromatic hydrocarbons.
  • naphthenic oils have higher alicyclic and aromatic hydrocarbon contents.
  • Paraffinic or naphthenic oils or their mixture are preferred according to the invention.
  • the organic esters generally correspond to the formula R'OOC (CH 2 ) n COOR 'in which R' is a linear or branched alkyl radical having approximately 6 to 9 carbon atoms and n is a number between 2 and approximately 20.
  • R' is a linear or branched alkyl radical having approximately 6 to 9 carbon atoms and n is a number between 2 and approximately 20.
  • the alkyl esters of adipic, azelaic or sebacic acids are preferred.
  • the phosphoric esters which can be used correspond to the formula OP (OR ") 3 in which R" can be an alkyl or aryl radical having approximately 4 to 20 carbon atoms.
  • R" can be an alkyl or aryl radical having approximately 4 to 20 carbon atoms.
  • Tricresylphosphate is an example of this class of synthetic oils.
  • oils of the polyalkylene glycol type mention may be made of polypropylene glycol and mixtures of polyethylene glycol and polypropylene glycol.
  • silicone oils mention may be made of dimethyl-polysiloxanes, diphenyl-polysiloxanes, methylphenyl-polysiloxanes.
  • the surfactant involved in the dispersions of rare earth halides of the invention has a hydrophobic part having, preferably, the same chemical nature as the oil base in order to allow its solubilization in oil.
  • the hydrophobic part can be constituted by a hydrocarbon group such as, for example, a linear or branched alkyl group or saturated or unsaturated cycloalkyl, a phenyl or alkylphenyl group, a naphthyl or alkylnaphthyl group.
  • a hydrocarbon group such as, for example, a linear or branched alkyl group or saturated or unsaturated cycloalkyl, a phenyl or alkylphenyl group, a naphthyl or alkylnaphthyl group.
  • the hydrophilic part of the surfactant is capable of adsorbing on the surface of the solid, namely the rare earth halide. It can include oxyethylenated and / or oxypropylenated units and optionally anionic groups such as sulfonate, sulfate or phosphate.
  • the number of ethylene oxide and / or propylene oxide units per mole of surfactant is advantageously less than or equal to 12. It is preferably chosen between 2 and 8.
  • the term “residue of an inorganic or organic base” means a metal atom, most often an alkali such as sodium or potassium, an ammonium radical or an ammonium residue of formula N (R k R I R m R n ) in which R k represents hydrogen and R ,, R m , R n identical or different, represented sense hydrogen, linear or branched alkyl or hydroxyalkyl radicals having from 1 to about 4 carbon atoms or phenyl radicals: two of the alkyl radicals can form a single divalent radical possibly containing an oxygen atom.
  • fatty alcohols involved in one of the formulas (I) to (III) use is made in particular of primary alcohols resulting from OXO synthesis and in particular to mixtures of isomeric alcohols sold under the name of primary alcohol "amyl “,” isohexanol “,” isodecanol “,” tridecanol “,” hexadecanol “or with linear aliphatic alcohols obtained by the Ziegler process, available in the form of cuts which are mixtures of alcohols C 6 to C 10 and C 12 to C 20 .
  • polyoxyalkylene fatty alcohols suitable for the invention mention may be made in particular of those derived from lauric, stearic, oleic alcohols and tridecanol ex-synthesis OXO.
  • Polyoxyethylenated derivatives of octylphenol, nonylphenol, dodecylphenol and dinonylphenol are preferred.
  • polyoxyalkylene fatty acid amides for example, lauric acid or coconut oil.
  • fatty acids examples include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid and natural fatty acids mixed in soybean, coconut oils, copra or in fats, especially tallow.
  • the preferred dispersions of cerium trifluoride in an oily medium of the invention comprise a mineral oil of the paraffinic type and a polyoxyethylenated surfactant derived from linear saturated aliphatic fatty alcohol (s) or branched (s) or of an amine of synthetic or natural fatty acid (s): the number of moles of ethylene oxide per mole of alcohol or amine is preferably lower to 10 and even more preferably between 2 and 6.
  • One method of obtaining dispersions of rare earth halides in an oily medium consists in preparing a solution of the surfactant as defined in the oil base which constitutes the dispersion medium, to be dispersed with stirring , at least one rare earth halide, then grinding the dispersion and optionally degassing the dispersion obtained.
  • the preparation of the dispersion medium presents no difficulty. It is carried out with stirring, by conventional stirring means (anchor, propeller or turbine stirring).
  • the dispersion of the rare earth halide is carried out with stirring.
  • the grinding operation is continued until an average fineness of approximately 4 ⁇ m is obtained. It is preferable that no particle exceeds 50 f..lm.
  • the dispersion can be ground in a vertical or horizontal ball mill.
  • the degassing operation is carried out while maintaining the dispersion with gentle agitation.
  • any additives required in the intended application for example, viscosity index modifiers (thickeners or thinners), oxidation inhibitors , corrosion inhibitors.
  • Dispersions of rare earth halides in oily medium can be used in all applications where such dispersions are used, in particular, in the field of lubrication and corrosion.
  • the dispersions of rare earth fluorides in an oily medium can be incorporated in the oily phase of conventional lubrication formulations in liquid, greasy or pasty form.
  • the dispersion of cerium trifluoride dispersion is carried out in an oily medium: the cerium trifluoride having an average diameter of aggregates of 0.3 ⁇ m.
  • the dispersion medium is first prepared, by dissolving 101 g of the surfactant defined in the various examples, in 1000 g of a PRIMOL 352 oil, which is a so-called paraffinic mineral oil containing 70% of hydrocarbons paraffinic and 30% naphthenic hydrocarbons (% carbon).
  • a PRIMOL 352 oil which is a so-called paraffinic mineral oil containing 70% of hydrocarbons paraffinic and 30% naphthenic hydrocarbons (% carbon).
  • a predispersion is thus obtained which is then ground in a "Mini Motor Mill” marketed by EIGER ENGINEERING Ltd; the grinding chamber is filled with 59 g of glass beads 1 mm in diameter, the rotation being 4000 rpm. The grinding is carried out for approximately 4 min.
  • the stability properties of said dispersion are assessed by subjecting it to an accelerated aging test, which consists in heating the dispersion in an oven at 40 ° C for 1 week.

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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)
  • Inorganic Chemistry (AREA)
  • Colloid Chemistry (AREA)
  • Lubricants (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Hard Magnetic Materials (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Plant Substances (AREA)
EP89402850A 1988-10-21 1989-10-16 Dispersions d'halogenures de terres rares en milieu huileux Expired - Lifetime EP0365413B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402850T ATE78511T1 (de) 1988-10-21 1989-10-16 Dispersionen von halogeniden seltener erder in oel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8813796 1988-10-21
FR8813796A FR2638168A1 (fr) 1988-10-21 1988-10-21 Dispersions d'halogenures de terres rares en milieu huileux

Publications (2)

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EP0365413A1 EP0365413A1 (fr) 1990-04-25
EP0365413B1 true EP0365413B1 (fr) 1992-07-22

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US (1) US4946608A (enrdf_load_stackoverflow)
EP (1) EP0365413B1 (enrdf_load_stackoverflow)
JP (1) JPH02158691A (enrdf_load_stackoverflow)
KR (1) KR920009631B1 (enrdf_load_stackoverflow)
AT (1) ATE78511T1 (enrdf_load_stackoverflow)
AU (1) AU613803B2 (enrdf_load_stackoverflow)
BR (1) BR8905339A (enrdf_load_stackoverflow)
DE (1) DE68902215T2 (enrdf_load_stackoverflow)
FI (1) FI895009A7 (enrdf_load_stackoverflow)
FR (1) FR2638168A1 (enrdf_load_stackoverflow)
GR (1) GR3005885T3 (enrdf_load_stackoverflow)
NO (1) NO894162L (enrdf_load_stackoverflow)
ZA (1) ZA897961B (enrdf_load_stackoverflow)

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WO1994005721A1 (en) * 1992-09-04 1994-03-17 Henkel Corporation Lubricants for paper coatings
JP5188003B2 (ja) * 2002-04-08 2013-04-24 エーザイ インコーポレイテッド プロポフォールの水溶性プロドラッグを含む薬学的組成物およびその投与方法
AU2003901149A0 (en) * 2003-03-13 2003-03-27 Monash University School Of Physics And Materials Engineering Rare earth - organic corrosion inhibiting coatings
US20060046940A1 (en) * 2004-08-27 2006-03-02 Mohannad Almalki Aqueous conveyor and cutting lubricant
US20070196657A1 (en) * 2005-12-15 2007-08-23 Cabot Corporation Transparent polymer composites
US7470974B2 (en) * 2006-07-14 2008-12-30 Cabot Corporation Substantially transparent material for use with light-emitting device
WO2008094812A2 (en) * 2007-01-29 2008-08-07 The Lubrizol Corporation Lubricating compositions comprising capped polyoxyalkylene polyols
JP5278732B2 (ja) * 2008-06-10 2013-09-04 日立化成株式会社 希土類磁石用処理液及びそれを用いた希土類磁石
JP2011051851A (ja) * 2009-09-03 2011-03-17 Hitachi Chem Co Ltd 希土類フッ化物微粒子分散液、この分散液の製造方法、この分散液を用いた希土類フッ化物薄膜の製造方法、この分散液を用いた高分子化合物／希土類フッ化物複合フィルムの製造方法、及び、この分散液を用いた希土類焼結磁石
CN111670241A (zh) 2018-02-07 2020-09-15 引能仕株式会社 冷冻机油及冷冻机用工作流体组合物
US11384309B2 (en) 2018-02-07 2022-07-12 Eneos Corporation Refrigerator oil and hydraulic fluid composition for refrigerators

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117929A (en) * 1958-08-08 1964-01-14 Texaco Inc Transparent dispersion lubricants
DE1594511A1 (de) * 1966-01-21 1970-12-17 Dow Corning Gmbh Gesenkschmierstoffe
BE791231Q (fr) * 1968-11-04 1973-03-01 Continental Oil Co Agents de dispersion des huiles repandues
US3830280A (en) * 1971-01-25 1974-08-20 Mallory & Co Inc P R Rare earth flouride lubricant for die casting components
US4034133A (en) * 1973-05-14 1977-07-05 International Business Machines Corporation Magnetic recording medium with lubricant
DE2932687A1 (de) * 1979-08-11 1981-02-26 Bayer Ag Emulgatorsystem und seine verwendung als entschaeumungs- und schaumverhuetungsmittel
DE2934951A1 (de) * 1979-08-29 1981-04-02 Bayer Ag, 5090 Leverkusen Waessrige dispersionen von epoxidverbindungen
DE3163160D1 (en) * 1980-05-08 1984-05-24 Exxon Research Engineering Co Lubricating oil composition containing sediment-reducing additive
EP0043963A1 (en) * 1980-06-30 1982-01-20 Union Carbide Corporation Improved process for ethoxylation of broad-range primary alcohols
DE3240309A1 (de) * 1982-10-30 1984-05-03 Bayer Ag, 5090 Leverkusen Verwendung von aralkyl-polyalkylen-glykolethern zur herstellung von waessrigen kohle-aufschlaemmungen
US4507214A (en) * 1983-11-02 1985-03-26 Union Oil Company Of California Rare earth halide grease compositions
CH668265A5 (de) * 1985-09-09 1988-12-15 Lonza Ag Verfahren zur herstellung von schmierwirkstoffen in pulvriger bis pastoeser form.
CH665847A5 (de) * 1985-10-02 1988-06-15 Lonza Ag Verfahren zum suspendieren von festschmierstoffen.
US4715972A (en) * 1986-04-16 1987-12-29 Pacholke Paula J Solid lubricant additive for gear oils
GB2193224A (en) * 1986-05-27 1988-02-03 Grace W R & Co Fuel oil additives

Also Published As

Publication number Publication date
DE68902215D1 (de) 1992-08-27
JPH02158691A (ja) 1990-06-19
GR3005885T3 (enrdf_load_stackoverflow) 1993-06-07
AU613803B2 (en) 1991-08-08
KR920009631B1 (ko) 1992-10-22
KR900006495A (ko) 1990-05-08
FR2638168A1 (fr) 1990-04-27
AU4356589A (en) 1990-04-26
NO894162L (no) 1990-04-23
DE68902215T2 (de) 1993-01-14
EP0365413A1 (fr) 1990-04-25
FI895009A7 (fi) 1990-04-22
FI895009A0 (fi) 1989-10-20
BR8905339A (pt) 1990-05-22
NO894162D0 (no) 1989-10-19
ATE78511T1 (de) 1992-08-15
US4946608A (en) 1990-08-07
ZA897961B (en) 1990-07-25

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