EP0236844A3 - Additifs pour huiles minérales ayant des caractéristiques modifiant le point d'écoulement - Google Patents

Additifs pour huiles minérales ayant des caractéristiques modifiant le point d'écoulement Download PDF

Info

Publication number: EP0236844A3
Authority: EP; European Patent Office
Prior art keywords: mol; mit; additives; carbon atoms; kohlenstoffatomen
Prior art date: 1986-03-07
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.): Granted

Application number

EP87102629A

Other languages

German (de)

English (en)

Other versions

EP0236844A2 (fr

EP0236844B1 (fr

Inventor

Horst Dr. Pennewiss

Heinz Jost

Helmut Knöll

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.)

Roehm GmbH Darmstadt

Original Assignee

Roehm GmbH Darmstadt

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.)

1986-03-07

Filing date

1987-02-24

Publication date

1988-03-30

1987-02-24 Application filed by Roehm GmbH Darmstadt filed Critical Roehm GmbH Darmstadt

1987-09-16 Publication of EP0236844A2 publication Critical patent/EP0236844A2/fr

1988-03-30 Publication of EP0236844A3 publication Critical patent/EP0236844A3/fr

1997-09-24 Application granted granted Critical

1997-09-24 Publication of EP0236844B1 publication Critical patent/EP0236844B1/fr

2007-02-24 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/14—Use of additives to fuels or fires for particular purposes for improving low temperature properties
- C10L10/16—Pour-point depressants
- 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
- C10L1/196—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
- C10L1/1963—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof mono-carboxylic
- 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
- C10L1/22—Organic compounds containing nitrogen
- C10L1/234—Macromolecular compounds
- C10L1/236—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derivatives thereof
- 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
- C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
- C10M145/12—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate monocarboxylic
- C10M145/14—Acrylate; Methacrylate
- 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
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- 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
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M149/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amido or imido group
- 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
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M149/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
- 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
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
- 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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- 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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/022—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amino group
- C10M2217/023—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amino group the amino group containing an ester bond
- 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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/024—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amido or imido group
- 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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/028—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
- 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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/06—Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound

Landscapes

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

EP87102629A 1986-03-07 1987-02-24 Utilisation d'additifs pour huiles minérales ayant des caractéristiques modifiant le point d'écoulement Expired - Lifetime EP0236844B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3607444		1986-03-07
DE19863607444 DE3607444A1 (de)	1986-03-07	1986-03-07	Additive fuer mineraloele mit stockpunktverbessernder wirkung

Publications (3)

Publication Number	Publication Date
EP0236844A2 EP0236844A2 (fr)	1987-09-16
EP0236844A3 true EP0236844A3 (fr)	1988-03-30
EP0236844B1 EP0236844B1 (fr)	1997-09-24

Family

ID=6295696

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP87102629A Expired - Lifetime EP0236844B1 (fr)	1986-03-07	1987-02-24	Utilisation d'additifs pour huiles minérales ayant des caractéristiques modifiant le point d'écoulement

Country Status (4)

Country	Link
US (1)	US4867894A (fr)
EP (1)	EP0236844B1 (fr)
JP (1)	JPS62212497A (fr)
DE (2)	DE3607444A1 (fr)

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US5312884A (en) *	1993-04-30	1994-05-17	Rohm And Haas Company	Copolymer useful as a pour point depressant for a lubricating oil
JP2748104B2 (ja) *	1994-03-08	1998-05-06	三洋化成工業株式会社	粘度指数向上剤及び潤滑油
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US6323164B1 (en)	2000-11-01	2001-11-27	Ethyl Corporation	Dispersant (meth) acrylate copolymers having excellent low temperature properties
JP4778688B2 (ja) *	2003-05-30	2011-09-21	三洋化成工業株式会社	流動点降下剤
US7378379B2 (en) *	2003-06-10	2008-05-27	The Lubrizol Corporation	Functionalized polymer composition for grease
JP2007527109A (ja)	2003-07-07	2007-09-20	ダウ・コ−ニング・コ−ポレ−ション	太陽電池の封入
US20060252660A1 (en) *	2005-05-09	2006-11-09	Akhilesh Duggal	Hydrolytically stable viscosity index improves
DE102005041528A1 (de)	2005-08-31	2007-03-01	Rohmax Additives Gmbh	Öllösliche Polymere
US8143202B2 (en) *	2006-11-07	2012-03-27	Ciba Corp.	Methacrylate copolymer pour point depressants
KR101574815B1 (ko) *	2007-12-18	2015-12-04	바스프 에스이	바이오디젤 저온 흐름 개선제
JP5483662B2 (ja) *	2008-01-15	2014-05-07	Ｊｘ日鉱日石エネルギー株式会社	潤滑油組成物
JP5806794B2 (ja) *	2008-03-25	2015-11-10	Ｊｘ日鉱日石エネルギー株式会社	内燃機関用潤滑油組成物
JP2010090251A (ja) *	2008-10-07	2010-04-22	Nippon Oil Corp	潤滑油基油及びその製造方法、潤滑油組成物
CN102239241B (zh)	2008-10-07	2013-09-18	吉坤日矿日石能源株式会社	润滑油基油及其制造方法以及润滑油组合物
WO2010041692A1 (fr)	2008-10-07	2010-04-15	新日本石油株式会社	Composition lubrifiante et procédé pour la produire
JP5829374B2 (ja)	2009-06-04	2015-12-09	Ｊｘ日鉱日石エネルギー株式会社	潤滑油組成物
CN102459547A (zh)	2009-06-04	2012-05-16	吉坤日矿日石能源株式会社	润滑油组合物
WO2010140391A1 (fr)	2009-06-04	2010-12-09	新日本石油株式会社	Composition d'huile de graissage et procede de fabrication associe
US8835367B2 (en)	2009-06-04	2014-09-16	The Lubrizol Corporation	Polymethacrylates as high VI viscosity modifiers
CN103275800B (zh)	2009-06-04	2016-06-22	吉坤日矿日石能源株式会社	润滑油组合物
JP5689592B2 (ja)	2009-09-01	2015-03-25	Ｊｘ日鉱日石エネルギー株式会社	潤滑油組成物
ES2382420T3 (es) *	2009-09-25	2012-06-08	Evonik Rohmax Additives Gmbh	Una composición para mejorar las propiedades de fluidez en frío de aceites combustibles
CN103459569B (zh)	2011-03-25	2018-01-19	巴斯夫欧洲公司	具有改进的非牛顿粘度特性的润滑剂组合物
FR2982871A1 (fr)	2011-11-22	2013-05-24	Univ Sud Toulon Var	Polymeres de poly(acrylate de n-alkyle)s et leur utilisation comme abaisseurs de point d'ecoulement de petrole
CA2869714A1 (fr) *	2012-04-27	2013-10-31	Evonik Oil Additives Gmbh	Utilisation de compositions d'agent ameliorant le fluage a froid pour des combustibles, leurs melanges avec des biocombustibles et leurs formulations
WO2014067748A1 (fr) *	2012-11-02	2014-05-08	Evonik Industries Ag	Formulations de distillat moyen contenant des copolymères de méthacrylate d'alkyle dispersifs exempts de soufre
WO2014067749A1 (fr) *	2012-11-02	2014-05-08	Evonik Industries Ag	Procédé de préparation de polymères dispersants à faible teneur en soufre
SG11201605185WA (en) *	2014-01-21	2016-08-30	Evonik Oil Additives Gmbh	Pour point depressants for improving the low-temperature viscosity of aged lubricating oil
JP2023554452A (ja)	2020-12-18	2023-12-27	エボニックオペレーションズゲーエムベーハー	低い残留モノマー含有量を有するアルキル（メタ）アクリレートのホモポリマーおよびコポリマーを製造する方法

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1986
- 1986-03-07 DE DE19863607444 patent/DE3607444A1/de not_active Ceased
1987
- 1987-02-24 DE DE3752119T patent/DE3752119D1/de not_active Expired - Lifetime
- 1987-02-24 EP EP87102629A patent/EP0236844B1/fr not_active Expired - Lifetime
- 1987-03-03 JP JP62046935A patent/JPS62212497A/ja active Pending
1988
- 1988-04-20 US US07/185,317 patent/US4867894A/en not_active Expired - Lifetime

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1235693A (fr) *	1958-07-28	1960-07-08	Shell Internationale Res Maatc	Procédé de préparation de polymères solubles dans l'huile et à teneur d'azote et produits en résultant
DE1444884A1 (de) *	1962-11-14	1969-01-09	Rohm & Haas	OElgemisch
EP0140274A2 (fr) *	1983-10-28	1985-05-08	Röhm Gmbh	Additifs pour huile lubrifiante

Also Published As

Publication number	Publication date
US4867894A (en)	1989-09-19
DE3607444A1 (de)	1987-09-10
JPS62212497A (ja)	1987-09-18
DE3752119D1 (de)	1997-10-30
EP0236844A2 (fr)	1987-09-16
EP0236844B1 (fr)	1997-09-24

Publication	Publication Date	Title
EP0236844A3 (fr)	1988-03-30	Additifs pour huiles minérales ayant des caractéristiques modifiant le point d'écoulement
DE3381316D1 (de)	1990-04-19	Oel- und kraftstoffzusammensetzungen, verwendung von polymeren als zusaetze in diesen und verfahren zur herstellung von polymeren.
DE69425019D1 (de)	2000-08-03	Copolymer, verwendbar als Stockpunktserniedriger für Schmieröl
JPS55112298A (en)	1980-08-29	Condensed polymer emulsion good for improvement of viscosity index*made of polymethacrylate and olefin copolymer in mineral oil and used as oil additive
WO2001040334A1 (fr)	2001-06-07	Copolymeres obtenus par procedes de polymerisation de radicaux par transfert d'atomes (prta) et procedes permettant de les preparer et de les utiliser
FR2536081B1 (fr)	1986-06-06	Compositions de bitumes-polymeres applicables a la realisation de liants routiers
ES2062234T3 (es)	1994-12-16	Rectificadores del indice de viscosidad de efecto dispersante.
DE3886857D1 (de)	1994-02-17	Fliessverbesserer und Trübungspunkterniedriger.
EP1526167A3 (fr)	2005-05-11	Agent d'amélioration de l'écoulement à froid pour huiles combustibles d'origine végétale ou animale
KR19990037293A (ko)	1999-05-25	(메트)아크릴 단량체의 음이온성 중합을 통한 신규한 유동점 강하제
GB1424977A (en)	1976-02-11	Tetrapolymers and mineral oil compositions containing them
ATE15055T1 (de)	1985-09-15	Schmieroeladditive auf der basis von styrol und schwer-(c12-20)-alkylmethacrylaten, verfahren zu ihrer herstellung und ihre verwendung.
EP0931825A3 (fr)	1999-09-15	Procédé d'amélioration des propriétés d'écoulement à froid d'huiles combustibles
DK27586A (da)	1986-07-29	Fremgangsmaade til fremstilling af et podningscopolymerforligelighedsmiddel, der kan anvendes som olieadditiv
ATE182869T1 (de)	1999-08-15	Neue additive für kohlenwasserstoffschmieröle und distillatbrennstoffe
US2613184A (en)	1952-10-07	Lubricating oil containing a copolymer of an ester of an unsaturated acid and a n-hydrocarbon amide of an unsaturated acid
DE59000480D1 (de)	1992-12-24	Verfahren zur verbesserung der fliessfaehigkeit von mineraloelen und mineraloeldestillaten.
US2998414A (en)	1961-08-29	Copolymer of mixed alkyl esters of unsaturated carboxylic acids
DE2259013B2 (de)	1978-01-26	Schmiermittel
EP1134275A3 (fr)	2002-08-07	Mélanges de copolymères et leurs utilisations comme additif pour l'amélioration des propriétés d'écoulement à froid de distillats moyens
GB928245A (en)	1963-06-12	Lubricating oil compositions
IT1258249B (it)	1996-02-22	Addittivo polimerico per olii lubrificanti
GB1112749A (en)	1968-05-08	Lubricant compositions
DE69117327T2 (de)	1996-10-10	Dispergierender, antioxydierender und multifunktioneller Viskositätsverbesserer
US2475246A (en)	1949-07-05	Lubricants

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