EP0254284B1 - Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huile minérales - Google Patents

Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huile minérales Download PDF

Info

Publication number
EP0254284B1
EP0254284B1 EP87110581A EP87110581A EP0254284B1 EP 0254284 B1 EP0254284 B1 EP 0254284B1 EP 87110581 A EP87110581 A EP 87110581A EP 87110581 A EP87110581 A EP 87110581A EP 0254284 B1 EP0254284 B1 EP 0254284B1
Authority
EP
European Patent Office
Prior art keywords
vinyl acetate
ethylene
weight
parts
mineral oil
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
EP87110581A
Other languages
German (de)
English (en)
Other versions
EP0254284A1 (fr
Inventor
Wolfgang Dr. Dipl.-Chem. Payer
Ludger Dr. Dipl.-Chem. Bexten
John Dr. Dipl.-Chem. Hobes
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Priority to AT87110581T priority Critical patent/ATE64409T1/de
Publication of EP0254284A1 publication Critical patent/EP0254284A1/fr
Application granted granted Critical
Publication of EP0254284B1 publication Critical patent/EP0254284B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/192—Macromolecular compounds
    • C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C10L1/197—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid
    • C10L1/1973—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid mono-carboxylic

Definitions

  • the present invention relates to a process for improving the flowability of mineral oils and mineral oil distillates by adding mixtures of an ethylene-vinyl acetate-diisobutylene terpolymer and an ethylene-vinyl acetate copolymer.
  • Mineral oils such as crude oil, diesel fuel or heating oil contain dissolved paraffin, which crystallizes out at low temperatures. These solid deposits often lead to disruptions in the extraction and use of mineral oils. For example, the ability of crude oil production and transport facilities to function until their complete failure are impaired. In diesel engines and combustion plants, the filters can become clogged, which ultimately results in an interruption in the fuel or heating medium supply.
  • additives are added to mineral oils that counteract the formation of wax crystals. This prevents an increase in the viscosity of the oils and lowers their pour point.
  • Copolymers of ethylene and carboxylic acid esters of vinyl alcohol have become very important as pour point depressants and flow improvers for crude oils and middle distillates.
  • ethylene-vinyl acetate copolymers have proven particularly useful.
  • Such copolymers and their use are described, for example, in DE-PS 19 14 756. They are generally manufactured by copolymerization of the monomers in autoclaves at temperatures from 80 to 150 ° C and pressures from 5 to 15 MPa in the presence of peroxides as initiators and organic solvents as the reaction medium.
  • the remedy is to add large quantities or to mix the mineral oil or mineral oil distillate with low-boiling hydrocarbons.
  • DE 26 39 672 Al describes mixtures of polymers with an ethylene skeleton and copolymers of C2bis C50 olefins, which can lead to a synergistic improvement in the flow properties of distillate hydrocarbon oils in the cold.
  • the object was therefore to find additives which have an even greater range of uses than the known flow improvers. They are also intended to increase the flowability of oils in which the known additives have little or no effect.
  • the object described above is achieved by a method for improving the flowability of mineral oils and mineral oil distillates. It is characterized in that mixtures of an ethylene-vinyl acetate-diisobutylene terpolymer and an ethylene-vinyl acetate copolymer are added to the mineral oils or mineral oil distillates.
  • the ethylene-vinyl acetate-diisobutylene terpolymers used according to the invention contain 25 to 78 parts by weight of vinyl acetate and 0.5 to 45 parts by weight of diisobutylene per 100 parts by weight of ethylene. Terpolymers with 30 to 55 parts by weight of vinyl acetate and 1.0 to 27.5 parts by weight of diisobutylene per 100 parts by weight of ethylene have proven particularly useful.
  • the average molecular weight of the terpolymers measured by vapor pressure osmometry is 500 to 10 000 g.mol -1 , preferably 1000 to 5000.g mol -1 and in particular 1500 to 3500.g mol -1 .
  • Each 100 CH2 groups have 6 to 20 and preferably 7 to 15 CH3 groups in the side chains, which do not result from the acetate residue of the vinyl acetate.
  • the number of CH3 groups is determined by H-NMR spectroscopy.
  • the production of the ethylene-vinyl acetate-diisobutylene terpolymers is known. It can e.g. by polymerization of the monomer mixture at pressures above 50 MPa and temperatures from 150 to 350 ° C. in the presence of oxygen or radical initiators in autoclaves or tubular reactors.
  • Diisobutylene is a mixture consisting essentially of 2,4,4-trimethylpentene (1) and 2,4,4-trimethylpentene (2). It is formed during the dimerization of isobutylene (2-methylpropene) with acidic catalysts (e.g. ion exchangers).
  • acidic catalysts e.g. ion exchangers
  • the ethylene-vinyl acetate copolymers used according to the invention contain 5 to 54 parts by weight of vinyl acetate per 100 parts by weight of ethylene. Copolymers with 11 to 33 parts by weight of vinyl acetate per 100 parts by weight of ethylene have proven particularly useful.
  • the average molecular weight of the copolymers which, like the average molecular weight of the terpolymers, is measured by vapor pressure osmometry, is 500 to 10 000 g.mo l-1 .
  • Copolymers with a molecular weight of 1,000 to 5,000 g.mol -1 have proven particularly useful.
  • Each l00 CH2 groups have the copolymers l to l0 and preferably 3 to 7 CH3 groups in the side chains, which do not result from the acetate residue of the vinyl acetate.
  • the number of CH3 groups is determined by H-NMR spectroscopy.
  • the production of the ethylene-vinyl acetate copolymers is known. It can e.g. by polymerization of the monomer mixture at pressures of 5 to 15 MPa and temperatures of 70 to 150 ° C in the presence of free radical initiators.
  • An organic solvent or suspension medium such as toluene can be used as the reaction medium.
  • the weight ratio of ethylene-vinyl acetate-diisobutylene terpolymer and ethylene-vinyl acetate copolymer in the mixtures is 100: 1 to 1: 1. Mixtures containing the terpolymer and copolymer in a weight ratio of 20: 1 to 3: 1 are preferred.
  • the process according to the invention improves both the flowability of mineral oils and of mineral oil distillates.
  • mineral oils is understood to mean crude oils and distillation residues such as heavy fuel oil.
  • Mineral oil distillates are hydrocarbon fractions with a boiling temperature between about 150 and 400 ° C. These include, for example, petroleum, light heating oils and diesel fuel. Middle distillates such as heating oil EL and diesel fuel are of particular importance.
  • the mixture of terpolymer and copolymer is added to mineral oils or mineral oil distillates in the form of solutions which contain 20 to 70% by weight (based on the solution) of the polymers.
  • Suitable solvents are aliphatic or aromatic hydrocarbons or hydrocarbon mixtures, e.g. Gasoline fractions. Kerosene is particularly suitable.
  • the amount of polymer based on mineral oil or mineral oil distillates should be 0.001 to 2, preferably 0.005 to 0.5% by weight.
  • the polymer mixtures can be used alone or together with other additives, e.g. with other pour point depressants or dewaxing aids, with corrosion inhibitors, antioxidants, sludge inhibitors and additives to lower the cloud point.
  • additives e.g. with other pour point depressants or dewaxing aids, with corrosion inhibitors, antioxidants, sludge inhibitors and additives to lower the cloud point.
  • the vinyl acetate content in the polymer is determined using the pyrolysis method. For this purpose, 200 mg of the polymer are heated with 300 mg of pure polyethylene in a pyrolysis flask to 450 ° C. for 5 minutes and the cracked gases are collected in a 250 ml round-bottom flask. The resulting acetic acid is reacted with a NaJ / KJO3 solution and the iodine released is titrated with Na2S2O3 solution. The diisobutylene content in the polymer is determined by 13 C-NMR spectroscopy.
  • Table 2 summarizes the results which describe the effectiveness of the process according to the invention for improving the flowability of mineral oils and mineral oil distillates.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Lubricants (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Claims (3)

  1. Procédé pour améliorer la fluidité d'huiles minérales et de leurs distillats, caractérisé en ce que l'on ajoute aux huiles minérales ou à leurs distillats des mélanges d'un copolymère ternaire éthylène-acétate de vinyle-diisobutylène et d'un copolymère éthylène-acétate de vinyle, à des proportions relatives de 100:1 à 1:1, de préférence de 20:1 à 3:1, entre le copolymère ternaire et le copolymère, le copolymère ternaire éthylène-acétate de vinyle-diisobutylène contenant de 25 à 78, plus spécialement de 35 à 55 parties en poids d'acétate de vinyle et de 0,5 à 45, plus spécialement de 1,0 à 27,5 parties en poids de diisobutylène pour 100 parties en poids d'éthylène, ayant une masse moléculaire moyenne (mesurée par osmométrie de pression de vapeur) de 500 à 10 000, de préférence de 1 000 à 5 000 et plus spécialement de 1 500 à 3 500 g.mol -1 et contenant dans les chaînes latérales, pour 100 groupes CH₂, de 6 à 20, de préférence de 7 à 15 groupes CH₃ ne provenant pas du radical acétate de l'acétate de vinyle, et le copolymère éthylène-acétate de vinyle contenant de 5 à 54, plus spécialement de 11 à 33 parties en poids d'acétate de vinyle pour 100 parties en poids d'éthylène, ayant une masse moléculaire moyenne (mesurée par osmométrie de pression de vapeur) de 500 à 10 000, plus spécialement de 1 000 à 5 000 g.mol-1 et contenant dans les chaînes latérales, pour 100 groupes cH₂, de 1 à 10, de préférence de 3 à 7 groupes CH₃ ne provenant pas du radical acétate de l'acétate de vinyle.
  2. Huile minérale ou distillat d'huile minérale ayant une fluidité améliorée, caractérisés en ce qu'ils contiennent de 0,001 à 2, de préférence de 0,005 à 0,5 % de leurs poids d'un mélange consistant en un copolymère ternaire éthylène-acétate de vinyle-diisobutylène et un copolymère éthylène-acétate de vinyle dans des proportions relatives en poids de 100:1 à 1:1, de préférence de 20:1 à 3:1.
  3. Huile minérale ou distillat d'huile minérale selon la revendication 2, caractérisés en ce que :
    - le copolymère ternaire éthylène-acétate de vinyle-diisobutylène contient de 25 à 78, plus spécialement de 30 à 55 parties en poids d'acétate de vinyle et de 0,5 à 45, plus spécialement de 1,0 à 27,5 parties en poids de diisobutylène pour 100 parties en poids d'éthylène, il a une masse moléculaire moyenne (mesurée par osmométrie de pression de vapeur) de 500 à 10 000, de préférence de 1 000 à 5 000 et plus spécialement de 1 500 à 3 500 g.mol-1 et il contient dans les chaînes latérales, pour 100 groupes CH₂, de 6 à 20, de préférence de 7 à 15 groupes cH₃ qui ne proviennent pas du radical acétate de l'acétate de vinyle,
    - le copolymère éthylène-acétate de vinyle contient de 5 à 54, plus spécialement de 11 à 33 parties en poids d'acétate de vinyle pour 100 parties en poids d'éthylène, il a une masse moléculaire moyenne (mesurée par osmométrie de pression de vapeur) de 500 à 10 000, plus spécialement de 1 000 à 5 000 g.mol-1 et il contient dans les chaînes latérales, pour 100 groupes CH₂, de 1 à 10, de préférence de 3 à 7 groupes CH₃ ne provenant pas du radical acétate de l'acétate de vinyle.
EP87110581A 1986-07-25 1987-07-22 Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huile minérales Expired - Lifetime EP0254284B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110581T ATE64409T1 (de) 1986-07-25 1987-07-22 Verfahren zur verbesserung der fliessfaehigkeit von mineraloelen und mineraloeldestillaten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863625174 DE3625174A1 (de) 1986-07-25 1986-07-25 Verfahren zur verbesserung der fliessfaehigkeit von mineraloelen und mineraloeldestillaten
DE3625174 1986-07-25

Publications (2)

Publication Number Publication Date
EP0254284A1 EP0254284A1 (fr) 1988-01-27
EP0254284B1 true EP0254284B1 (fr) 1991-06-12

Family

ID=6305966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110581A Expired - Lifetime EP0254284B1 (fr) 1986-07-25 1987-07-22 Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huile minérales

Country Status (4)

Country Link
EP (1) EP0254284B1 (fr)
AT (1) ATE64409T1 (fr)
DE (2) DE3625174A1 (fr)
ES (1) ES2023855B3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857776A1 (fr) 1997-01-07 1998-08-12 Clariant GmbH Amélioration de la fluidité d'huiles minérales et de distillates d'huiles minérales par l'utilisation de résines alkylphénol-aldéhyde
WO2010081634A1 (fr) 2009-01-13 2010-07-22 Evonik Rohmax Additives Gmbh Compositions de carburant ayant un point de trouble amélioré et des propriétés améliorées au stockage
WO2011095249A1 (fr) 2010-02-05 2011-08-11 Evonik Rohmax Additives Gmbh Composition ayant une filtrabilité améliorée
DE10155774B4 (de) 2001-11-14 2020-07-02 Clariant Produkte (Deutschland) Gmbh Additive für schwefelarme Mineralöldestillate, umfassend einen Ester alkoxylierten Glycerins und einen polaren stickstoffhaltigen Paraffindispergator

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922146A1 (de) * 1989-07-06 1991-01-17 Roehm Gmbh Additive fuer dieselkraftstoff
CN1035676C (zh) * 1991-12-12 1997-08-20 中国石油化工总公司石油化工科学研究院 柴油流动改进剂的制备方法
GB9213871D0 (en) † 1992-06-30 1992-08-12 Exxon Chemical Patents Inc Oil additives and compositions
DE19620118C1 (de) * 1996-05-18 1997-10-23 Hoechst Ag Terpolymerisate des Ethylens, ihre Herstellung und ihre Verwendung als Additive für Mineralöldestillate
DE19620119C1 (de) * 1996-05-18 1997-10-23 Hoechst Ag Terpolymerisate des Ethylens, ihre Herstellung und ihre Verwendung als Additive für Mineralöldestillate
US5681359A (en) * 1996-10-22 1997-10-28 Quantum Chemical Corporation Ethylene vinyl acetate and isobutylene terpolymer as a cold flow improver for distillate fuel compositions
DE19729056C1 (de) * 1997-07-08 1998-12-03 Clariant Gmbh Fließverbesserer für Mineralöle
DE19739271A1 (de) * 1997-09-08 1999-03-11 Clariant Gmbh Additiv zur Verbesserung der Fließfähigkeit von Mineralölen und Mineralöldestillaten
DE19802690C2 (de) * 1998-01-24 2003-02-20 Clariant Gmbh Additiv zur Verbesserung der Kaltfließeigenschaften von Brennstoffölen
DE19823565A1 (de) 1998-05-27 1999-12-02 Clariant Gmbh Mischungen von Copolymeren mit verbesserter Schmierwirkung
EP1294832B1 (fr) 2000-06-15 2004-09-08 Clariant International Ltd. Additif pour ameliorer la fuidite a froid et la stabilite au stockage du petrole brut
DE10155747B4 (de) 2001-11-14 2008-09-11 Clariant Produkte (Deutschland) Gmbh Additive für schwefelarme Mineralöldestillate, umfassend einen Ester eines alkoxylierten Polyols und ein Alkylphenol-Aldehydharz
US6673131B2 (en) 2002-01-17 2004-01-06 Equistar Chemicals, Lp Fuel additive compositions and distillate fuels containing same
EP1380635B1 (fr) 2002-07-09 2013-01-23 Clariant Produkte (Deutschland) GmbH Agent d'amélioration de l'écoulement à froid pour huiles combustibles d'origine animale ou végétale.
DE10349851B4 (de) 2003-10-25 2008-06-19 Clariant Produkte (Deutschland) Gmbh Kaltfließverbesserer für Brennstofföle pflanzlichen oder tierischen Ursprungs
DE10349850C5 (de) 2003-10-25 2011-12-08 Clariant Produkte (Deutschland) Gmbh Kaltfließverbesserer für Brennstofföle pflanzlichen oder tierischen Ursprungs
DE10357878C5 (de) 2003-12-11 2013-07-25 Clariant Produkte (Deutschland) Gmbh Brennstofföle aus Mitteldestillaten und Ölen pflanzlichen oder tierischen Ursprungs mit verbesserten Kälteeigenschaften
DE10357880B4 (de) 2003-12-11 2008-05-29 Clariant Produkte (Deutschland) Gmbh Brennstofföle aus Mitteldestillaten und Ölen pflanzlichen oder tierischen Ursprungs mit verbesserten Kälteeigenschaften
ITMI20132043A1 (it) 2013-12-06 2015-06-07 Eni Spa Composizioni a base di copolimeri etilene-vinilacetato e loro impiego come additivi anti-gelificazione di greggi petroliferi paraffinici

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1914756C3 (de) * 1968-04-01 1985-05-15 Exxon Research and Engineering Co., Linden, N.J. Verwendung von Ethylen-Vinylacetat- Mischpolymerisaten für Erdöl-Destillate
JPH0710900B2 (ja) * 1982-06-18 1995-02-08 エクソン リサーチ アンド エンヂニアリング コムパニー 中級蒸留物燃料油用流動性改良剤
CA1263663C (fr) * 1984-12-06 1989-12-05 Terpolymeres d'ethylene, d'acetate de vinyle et d'isobutylene, additifs abaissant le point d'ecoulement dans les hydrocarbures distilles
DE3501384A1 (de) * 1985-01-17 1986-07-17 Ruhrchemie Ag, 4200 Oberhausen Verfahren zur verbesserung der fliessfaehigkeit von mineraloelen und mineraloeldestillaten
US4746327A (en) * 1985-03-25 1988-05-24 Standard Oil Company (Indiana) Ethylene-unsaturated, ester-substituted olefin terpolymer flow improvers
DE3616056A1 (de) * 1985-05-29 1986-12-04 Hoechst Ag, 65929 Frankfurt Verwendung von ethylen-terpolymerisaten als additive fuer mineraloele und mineraloeldestillate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857776A1 (fr) 1997-01-07 1998-08-12 Clariant GmbH Amélioration de la fluidité d'huiles minérales et de distillates d'huiles minérales par l'utilisation de résines alkylphénol-aldéhyde
DE10155774B4 (de) 2001-11-14 2020-07-02 Clariant Produkte (Deutschland) Gmbh Additive für schwefelarme Mineralöldestillate, umfassend einen Ester alkoxylierten Glycerins und einen polaren stickstoffhaltigen Paraffindispergator
WO2010081634A1 (fr) 2009-01-13 2010-07-22 Evonik Rohmax Additives Gmbh Compositions de carburant ayant un point de trouble amélioré et des propriétés améliorées au stockage
WO2011095249A1 (fr) 2010-02-05 2011-08-11 Evonik Rohmax Additives Gmbh Composition ayant une filtrabilité améliorée

Also Published As

Publication number Publication date
DE3770711D1 (de) 1991-07-18
EP0254284A1 (fr) 1988-01-27
ATE64409T1 (de) 1991-06-15
DE3625174A1 (de) 1988-01-28
ES2023855B3 (es) 1992-02-16

Similar Documents

Publication Publication Date Title
EP0254284B1 (fr) Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huile minérales
EP0203554B1 (fr) Utilisation de terpolymères d'éthylène, comme additifs pour huiles minérales et distillats d'huiles minérales
EP0463518B1 (fr) Terpolymères de l'éthylène, leur préparation et leur utilisation pour les distillats d'huile minérale
EP0493769B1 (fr) Terpolymères de l'éthylène, leur préparation et leur utilisation pour les distillats d'huile minérale
EP0777712B1 (fr) Melanges polymeres et leur utilisation comme additifs pour distillats moyens de petrole
DE19757830C2 (de) Brennstofföle mit verbesserter Schmierwirkung
EP0807642B1 (fr) Terpolymères de l'éthylène, leur préparation et leur utilisation pour les distillats d'huile minérale
EP0258572B1 (fr) Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huiles minérales
EP0922716B1 (fr) Procédé de préparation de terpolymères d'éthylène et leur utilisation comme additifs à l'huile minérale et aux distillats d'huile minérale
EP0405270B1 (fr) Procédé d'amélioration de la fluidité d'huiles minérales et de distillats d'huiles minérales
DE3640613A1 (de) Verfahren zur herstellung von ethylen-mischpolymerisaten und deren verwendung als zusatz zu mineraloel und mineraloelfraktionen
DE2519577C2 (de) Additive und diese enthaltende brenn- und treibstoffe
DE2331041A1 (de) Heizoelformulierung
EP0406684A1 (fr) Additif pour combustible diesel
DE2446829A1 (de) Brennstoffoel
EP1200539B1 (fr) Utilisation de copolymeres comportant des groupes hydroxyl pour la preparation d'huiles combustibles a pouvoir lubrifiant ameliore
DE3382624T3 (de) Zwischendestillatzubereitungen mit verbessertem Fliessverhalten bei niedriger Temperatur.
DE19729057A1 (de) Copolymere auf Basis von Ethylen und ungesättigten Carbonsäureestern und ihre Verwendung als Mineralöladditive
EP0190553B1 (fr) Procédé d'amélioration de la fluidité des huiles minérales et des distillats d'huiles minérales
EP0890633B1 (fr) Utilisation de copolymères d'éthylène et d'esters carboxyliques insaturés dans des distillats moyens pour l'amélioration des propriétés d'écoulement à froid
EP0251002B1 (fr) Procédé pour améliorer la fluidité d'huiles minérales et de distillats d'huiles minérales
EP0309897B1 (fr) Copolymères d'éthylène et d'ester vinylique de l'acide méthoxy-acétique et application comme additifs aux distillats d'huile minérale
DE19816797C2 (de) Verwendung von stickstoffhaltigen Ethylencopolymeren zur Herstellung von Brennstoffölen mit verbesserter Schmierwirkung
DE2620840C2 (fr)
DE4341765A1 (de) Copolymerisate auf Ethylenbasis und ihre Verwendung als Fließverbesserer in Erdölmitteldestillaten

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19880209

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HOECHST AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19890502

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 64409

Country of ref document: AT

Date of ref document: 19910615

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3770711

Country of ref document: DE

Date of ref document: 19910718

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2023855

Country of ref document: ES

Kind code of ref document: B3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920623

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920629

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920710

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920713

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19920715

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19920717

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19920722

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920731

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920805

Year of fee payment: 6

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930722

Ref country code: GB

Effective date: 19930722

Ref country code: AT

Effective date: 19930722

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930723

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19930723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930731

Ref country code: CH

Effective date: 19930731

Ref country code: BE

Effective date: 19930731

BERE Be: lapsed

Owner name: HOECHST A.G.

Effective date: 19930731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930722

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 87110581.3

Effective date: 19940210

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980912

Year of fee payment: 12

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050722