DE1913857A1 - Graft copolymer lubricant additives - Google Patents

Graft copolymer lubricant additives

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Publication number
DE1913857A1
DE1913857A1 DE19691913857 DE1913857A DE1913857A1 DE 1913857 A1 DE1913857 A1 DE 1913857A1 DE 19691913857 DE19691913857 DE 19691913857 DE 1913857 A DE1913857 A DE 1913857A DE 1913857 A1 DE1913857 A1 DE 1913857A1
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polymers
lubricating oil
temperature
copolymers
chains
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DE19691913857
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German (de)
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Herbert Schreiber
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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
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/026—Butene
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
    • 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
    • C10M2209/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
    • 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
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • 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
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
    • 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
    • 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
    • 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
    • C10M2209/086—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 polycarboxylic, e.g. maleic acid

Abstract

Graft copolymers contg. one or more chains of polymers (A) which are easily soluble in a lubricant to be improved and are grafted onto polymeric compds. (B), which in the lubricant to be improved are soluble only above a temp. within the temp. range of application and are insol. below this temp. range, are used as lubricant additives having a viscostatic effect. The graft copolymers are suitable for natural oils such as mineral oils or fatty oils of animal and plant origin, and also for synthetic lubricants.

Description

Schmierölzusätze Gegenstand der Erfindung sind viscstatische Zusätze zur Verringerung der Viskositäts-Temperatr-Abhängigkeit von Schmierölen. Die erfindungsgemässen Schmierölzusätze bestehen aus Pfropfcopolymeren, die dadurch gekennzeichnet sind, dass eine oder mehrere Ketten von Polymeren (A), die in dem zu verbessernden Schmieröl gut löslich sind, auf polymere Verbindungen (B), die in dem zu Serbessernden Schmieröl nur oberhalb einer im Bereich der Anwendungstemperatur der Schmieröle liegenden Temperatur löslich und unterhalb dieser Temperatur unlöslich sind, aufgepfropft sind. Als Pfropfcopolymere sind auch die sogenannten Blockcopolymeren, bei denen nur eine oder zwei Polymerketten auf ein Basispolymeres, und zwar an dessen Enden, gepfropft sind, zu betrachten.Lubricating Oil Additives The invention relates to viscostatic additives to reduce the viscosity-temperature dependency of lubricating oils. The inventive Lubricating oil additives consist of graft copolymers, which are characterized by that one or more chains of polymers (A) contained in the lubricating oil to be improved are readily soluble, on polymeric compounds (B), which are in the lubricating oil to be served only above one in the range of the application temperature of the lubricating oils Temperature soluble and insoluble below this temperature are grafted are. The so-called block copolymers are also used as graft copolymers, in which only one or two polymer chains on a base polymer, namely at its ends, are grafted to look at.

Die bisher als Schmierölzusätze beschriebenen Pfropfcppolymeren lassen sich in zwei Gruppen einteilen: Bei der einen sind sowohl das Basispolymere als tuch das aufgepfropfte Polymere gut löslich. Bei der andern Gruppe ist nur die eine dieser beiden Komponenten Löslich, Während die andere Komponente über den ganzen Anwendungs-Xemperatur-Beriich unlöslich ist. Es wurde jedoch bisher nicht erkannt, dass die viscostatische Wirksamkeit wesentlich verbessert wird, wenn, wie bei den erfindungsgemässen Pfropfcopolymernn die Basisketten nuf bei höheren Xemperaturen löslich sind. Während die Lösungen der bisher bekannten viscostatischen Schmierölzusätze in Schmierölin eine, wenn auch etwas flachere, aber immer noch steile Viskostäts-Temperatur-Kurve zeigen, besitzen die erfindungsgemässen Zusätze eine deraft ausgeprägte Wirkung, dass sich die Steigung dieser Kurve iei etwas konzentrierteren Lösungen sogar umkehrt. In einem bestimmten Temperaturbereich nimmt die Viskosität dieser Lösungen mit steigender Temperatur reversibel zu. Ein solcher Effekt war bisher unbekannt.The graft polymers previously described as lubricating oil additives can be used can be divided into two groups: One is both the base polymer and The grafted-on polymer is readily soluble in the cloth. With the other group there is only one these two components are soluble, while the other component all over Application temperature range is insoluble. However, it has not yet been recognized that the viscostatic effectiveness is significantly improved if, as with the According to the invention graft copolymers the base chains only at higher temperatures are soluble. While the solutions of the previously known viscostatic lubricating oil additives in lubricating oil a viscosity-temperature curve, albeit a little flatter, but still steep show, the additives according to the invention have such a pronounced effect, that the slope of this curve is even reversed in the more concentrated solutions. In a certain temperature range, the viscosity of these solutions increases with increasing Temperature reversible to. Such an effect was previously unknown.

Auch der experimentelle Aufwand für die Entwicklung wirksamer viscostatischer Schmierälzusätze kann durch die Erfindu wesentlich verringert werden. du sich für die Zusammensetzung und den Aufbau eines Pfropfcopolymeren aus z.B. 3 verschiedenen Monomeren unendlich viele Variationsmöglichkeiten bieten, waren bisher für die Entwicklung brauchbarer Polymerer zahlreiche 1>olymerisationsversuche erforderlich, wobei die Wirksamkeit der erhaltenen Produkte durch umständliche Viskositätsmessungen bei verschiedenen Temperaturen bestimmt werden musste. Dagegen macht es die Erfindung durch eine dem Fachmann ohne Schwierigkeit mögliche Auswahl der Basispolymeren und der das aufzupfropfende Polymere bikdenden Monomeren möglich , unmittelbar Schmierölzusätze mit höchster Wirksamkeit zu herzustellen.Also the experimental effort for the development of effective viscostatic Lubricant additives can by the invention can be reduced significantly. you are interested in the composition and structure of a graft copolymer from e.g. 3 different monomers offer an infinite number of possibilities for variation Numerous polymerization attempts have so far been made for the development of useful polymers required, the effectiveness of the products obtained by cumbersome viscosity measurements had to be determined at different temperatures. In contrast, the invention makes it by a selection of the base polymers and, which is possible without difficulty for the person skilled in the art of the monomers binding the polymer to be grafted on, direct lubricating oil additives are possible to produce with the highest efficiency.

Die Herstellung der Pfropfcopolymeren kann in an sich bekannter Weise durch rEdikalisch, anionisch, kationisch oder mittels energiereicher Strahlung initiierte Polymerisation der Grundmonomeren der Ketten (A) in Gegenwart der Basispolymeren (B) hergestellt werden. Durch den Einbau reaktionsfähiger Gruppen in das Basispolymere, die als Initiatoren, tJbertragungs- oder Abbruchregler wirken, kann der Pfropfungsgrad erhöht und gesteuert werden.The graft copolymers can be prepared in a manner known per se initiated by radical, anionic, cationic or high-energy radiation Polymerization of the basic monomers of the chains (A) in the presence of the basic polymers (B) can be produced. By incorporating reactive groups into the base polymer, The degree of grafting can act as initiators, transfer or termination regulators can be increased and controlled.

Die erfindungsgemässen Pfropfcopolymeren eignen sich als viscostatische Zusätze sowohl für natürliche Öle wie Mineralöle oder fette Öle tierischen und pflanzlichen Ursprungs als auch für sythtische Schmieröle. Die zusammensSzung der sate.The graft copolymers according to the invention are suitable as viscostatic ones Additives for both natural oils such as mineral oils or fatty oils of animal and vegetable origin Origin as well as for synthetic lubricating oils. The composition of the seeds.

insbesondere diejenige der Basisketten (B), muss dem Lösungsvermögen der Schmieröle angepasst sein. Unter Berücksichtigung der dem Fachmann bekannten Löslichkeitseigenscheften der Polymeren und Copolymeren in den verschiedenenv Schmierölen lassen sich geeignete Polymerisate ohne Schwierigkeit auswählen.in particular that of the basic chains (B), must have the ability to dissolve be adapted to the lubricating oils. Taking into account those known to the person skilled in the art Solubility properties of polymers and copolymers in various lubricating oils suitable polymers can be selected without difficulty.

Bei den Zusätzen für die wirtschaftlich besonders interessanten mineralischen Schmieröleneignen sich als Basispolymere (B) insbesondere die Polymeren und Copolymeren der Monomeren Gruppen: aliphatische und aromatische ungesättigte Kohlenwasserw stoffe, Ester ,-ungesättigter Carbonsäuren, insbesondere der Acryl-, Methacryl-, Pumar- und Maleinsäure, Ester und Äther ungesättigter Alkohole, insbesondere Vinylester und Vinyläther. Zum Aufbau der aufgepfropften, gut löllichen Polymerkatten (A) sind insbesondere Monomere aus folgenden Gruppen geeignet: aliphati sche Kohlenwasserstoffe, insbesondere isobuten, Ester a-ge sättigter Carbonsäuren wie der Acryl-, Methacryl, Fumar- und Maleinsäure ait mindestens 8 C-Atomen im Alkoholrest, Fettsäureester ungesättigter Alkohole, insbesondere Vinyl-Fettsäure-Ester mit mindestens 10 C-Atomen im Fettsäurerest, Äther ungesättigter Alkohole, insbesondere Vinyläther mit mindestens 8 C-Atomen im Alkoholrest.In the case of the additives for the mineral lubricating oils of particular economic interest, the polymers and copolymers of the monomer groups in particular are suitable as base polymers (B): aliphatic and aromatic unsaturated hydrocarbons, esters, unsaturated carboxylic acids, in particular acrylic, methacrylic, pumaric and maleic acid , Esters and ethers of unsaturated alcohols, especially vinyl esters and vinyl ethers. Monomers from the following groups are particularly suitable for building up the grafted-on, readily soluble polymer cats (A): aliphatic hydrocarbons, in particular isobutene, esters a-ge saturated carboxylic acids such as acrylic, methacrylic, fumaric and maleic acid with at least 8 carbon atoms in the alcohol residue, fatty acid esters of unsaturated alcohols, in particular vinyl fatty acid esters with at least 10 carbon atoms in the fatty acid residue, ethers of unsaturated alcohols, in particular vinyl ethers with at least 8 C atoms in the alcohol residue.

Besonders geeignet fUr den Aufbau der erfindungsgemässen Pfropfcopolymerisate sind di Ester der Acryl- und Methacrylsäure, da deren Polymerisate neben den erforderlichen Löslichkleitseigenschaften such eine gute Scherstabilität besitzen. Ausserdem lassen sich mit diesen Monomerem und Polymeren durch anionische Polymerisation besonders leicht definierte Pfropfcopolymere herstellen. Als Basispolymere (B) einen sich insbesondere Polymerisa to oder Copolymerisate der Acryl- und Methacrylsäueester aliphatischer Alkohle mit bis 8 C-Atomen im Alkoholrest. Die aufgepfropften Polymerisatketten (A) können vorwiegend aus Acryl-und Methacrylsäureestern der aliphatischen Alkohole mit 10 bis 16 C-Atomen im Alkochlrest hergestellt werles. Particularly suitable for building up the graft copolymers according to the invention are di esters of acrylic and methacrylic acid, as their polymers in addition to the required Solubility properties also have good shear stability. Also leave especially with these monomers and polymers through anionic polymerization produce easily defined graft copolymers. The base polymer (B) is one in particular polymers or copolymers of acrylic and methacrylic esters aliphatic alcohol with up to 8 carbon atoms in the alcohol residue. The grafted polymer chains (A) Can be made predominantly from acrylic and methacrylic acid esters of aliphatic alcohols with 10 to 16 carbon atoms in the alcohol residue.

Neben diesen im Wesentlien @@@@ppl@ren @@@@@@@ kö@nen auch Monomers mit polaren Gruppen @un Ersielung besonderer Eigenschaften susätzlich eingebaut werden.In addition to these, in the main, monomers can also be used with polar groups @un special properties additionally built in will.

Die erfindungsgenässen Schmierölzusätze zeigen ihre stärkste Wirkmamkeit in dem Temperaturbereich, in dem sich das Basispolymere (B) löst. Sollen Schmierölze mit guter Wirkung über einen breiteren Temperaturbereich hergestellt werden, so empfiehlt es sich, von Mischungen der Basispolymeren (B) mit verschiedener Monomerenzusammensetzung auszugehen, deren einzelne Kompomenten bei verschiedenen Temperaturen in Lösung gehen. Man kann auch Basispolymere verwenden, deren Zusammensetzung sich in der Kette sukzessive ändert. The lubricating oil additives according to the invention show their greatest effectiveness in the temperature range in which the base polymer (B) dissolves. Shall lubricants can be produced with good effect over a wider temperature range, so it is advisable to use mixtures of the base polymers (B) with different monomer compositions assume their individual components at different temperatures in solution walk. You can also use base polymers whose composition is in the Chain changes successively.

Beispiel 1: In einer Lösung von 4 g des Ammoniumsalzes von Dodecyl-Phenol-Polyglykoläther-Monosulfat in 150 g Wasser wird die Mischung von 70 g Butylmethacrylat und 30 g Laurylmethacrylat emulgiert und unter Rühren 24 Stunden bei 65° polymerisiert.Example 1: In a solution of 4 g of the ammonium salt of dodecyl phenol polyglycol ether monosulfate in 150 g of water, the mixture of 70 g of butyl methacrylate and 30 g of lauryl methacrylate emulsified and polymerized with stirring at 65 ° for 24 hours.

Als Initiator wird allmählich eine Lösung von 0,2 g persulfat in 5 g Wasser zugesetzt. Eine isolierte Probe des entstandenen Polymerisats ist bei etwa 130° in Mjnrralöl löslich. Der Polymerisatlösung werden nun 40 g Laurylmethacrylat zugerührt und weitere 20 Stunden bei 65° unter Zusatz von 0,1 g Kaliumpersulfat polymerisiert. Durch Zugabe von Methanol wird das Pfropfoopolymerisat ausgefällt. Man erhält ein Pfropfcopolymerisat mit einer bei ca. 130° in Lösung gehenden Basiskette, auf die gut lösliche Seitenketten aus Polyaurylmethacrylat aufgapfropft sind.A solution of 0.2 g of persulfate in 5 g water added. An isolated sample of the resulting polymer is at about 130 ° soluble in myrral oil. The polymer solution is now 40 g of lauryl methacrylate stirred in and a further 20 hours at 65 ° with the addition of 0.1 g of potassium persulfate polymerized. The graft copolymer is precipitated by adding methanol. A graft copolymer is obtained with a base chain which dissolves at about 130 °, are grafted onto the readily soluble polyauryl methacrylate side chains.

Das Pfopfropolymere kann bei etwa 150° in aliphatischen Mineral ölen gelöst werden. Beim Abkühlen auf Raumtemperatur bleiben diese Lösungen homogen Eine 10 @ige Lösung geliert beim Erwärmen bei etwa 130° und verflüssigt sich wieder beim Abkühlen.The graft polymer can oil at about 150 ° in aliphatic mineral be solved. These solutions remain homogeneous on cooling to room temperature 10 @ige solution gels when heated at about 130 ° and liquefies again when Cooling down.

In Tabelle 1 sind die Viskositäten des reinen Mineralöles und einer 5 %igen Lösung angegeben Tabelle 1 Temperatur 25° 52° 70° 100° 125° 150° Mineralöl cSt 66 20,2 9,6 5,4 3,5 2,4 Lösung 5 % cSt 235 8593 47,0 3699 44,5 35,0 Die Viskosität der 5 %igen Lösung verhält sich im Bereich von 25 bis 1000 normal. Von 100 auf 125° nimmt sie deutlich eu und von 125 auf 150° nur wenig ab.Table 1 shows the viscosities of the pure mineral oil and a 5% solution Table 1 Temperature 25 ° 52 ° 70 ° 100 ° 125 ° 150 ° Mineral oil cSt 66 20.2 9.6 5.4 3.5 2.4 Solution 5% cSt 235 8593 47.0 3699 44.5 35.0 Die The viscosity of the 5% solution is normal in the range from 25 to 1000. It decreases significantly from 100 to 125 ° and only slightly from 125 to 150 °.

Beispiel 2 : Wie in Beispiel 1 wird ein Emulsionspolymerisat hergestellt, mit dem Unterschied, dass in der 1. Stufe eine Mischung von 60 g Octylmethacrylat mit 40 g Butylmethacrylat und in der 2. Stufe 20 g Laurylmethycrylat polymerisiert werden. Das in der 1,. Stufe hergestellte Basispolymere löst sich in einem alihatisehen Mineralöl bdi 45 bis 500. Eine 10 %ige Lösung des Pfropfcopolymerisats mit geliert beim Erwärmen bei 50 bis 600 und wird beim Abküh@len wieder flüssig. Eine 3,3 und eine 1 %ige Lösung zeigen die in Tabelle 2 angegebenen Viskositäten.Example 2: As in Example 1, an emulsion polymer is produced, with the difference that in the 1st stage a mixture of 60 g of octyl methacrylate polymerized with 40 g of butyl methacrylate and in the 2nd stage 20 g of lauryl methacrylate will. That in the 1 ,. The base polymer produced in the first stage dissolves in an aliphatic layer Mineral oil from 45 to 500. A 10% solution of the graft copolymer also gels when heated to 50 to 600 and becomes liquid again when cooled. A 3.3 and a 1% solution show the viscosities given in Table 2.

Tabelle 2 Temperatur 37,8° 98,8% m-Wert # (1) Mineralöl cSt 36,0 5,5 3,79 Lösung 3,3 % cSt 76,0 37,0 1,00 Lösung 1 % @St 44,1 11,15 2,50 (1) m-Wert = Steilheitsfunktion n@ch C. WaltherTable 2 Temperature 37.8 ° 98.8% m-value # (1) Mineral oil cSt 36.0 5.5 3.79 solution 3.3% cSt 76.0 37.0 1.00 solution 1% @St 44.1 11.15 2.50 (1) m-value = Slope function according to C. Walther

Claims (1)

Patentansprüche Anspruch 1: Verewndung von Pfrppfeopolymeren als viscostatisch wirkende Schmierölzusätze, die dadurch gekenneichnet sind, dass in den Pfropfcopolymeren eine oder mehrere Kettdn von Polymeren CA), die in dem zu verbessernden Schmieröl gut löslich sind, auf polymere Verbindungen1(B), die in dem zu verbessernden Schmieröl öl nur oberhalb einer im Bereich der Anwendungstemperatur der Schmieröle liegenden Temperatur löslich und unterhalb dieser Temperatur unlöslich sind, aufgepfropft sind.Claims Claim 1: Use of graft polymers as viscostatic active lubricating oil additives, which are characterized in that in the graft copolymers one or more chains of polymers CA) contained in the lubricating oil to be improved are readily soluble on polymeric compounds 1 (B) which are in the lubricating oil to be improved oil only above a temperature in the range of the application temperature of the lubricating oils Temperature soluble and insoluble below this temperature are grafted are. Anspruch 2: Schmierölzusätze nach Anspruch 1, dadurch gekennzeichnet dass die Pfropfcopolymeren aus Acryl- und/oder Methacrylsäureestern aufgebaut sind.Claim 2: Lubricating oil additives according to Claim 1, characterized that the graft copolymers are built up from acrylic and / or methacrylic acid esters. Anspruch 3: Schmierölzusätze nach Anspruch 1, dadurch gekennzeichnet, dass die pol erden Ketten (A) aus Polymeren oder Copolymeren von Acryl- und oder Methacrylsäureestern aliphatischer Alkohole mit 10 bis 18 O-Atomen im Alkoholrest aufgebaut sind.Claim 3: Lubricating oil additives according to Claim 1, characterized in that that the pole earth chains (A) made of polymers or copolymers of acrylic and or Methacrylic acid esters of aliphatic alcohols with 10 to 18 O atoms in the alcohol residue are constructed. Anspruch 4: Schmierölzusätze nach Anspruch 1, dadurch gekennzeichnet, dasp die polymeren Verbindungen (B) aus Polymeren oder Oopolymerin von Acryl- und/oder Methacrylsäureestern aliphatischer Alkohole mit bis 8 C-Atomen im Alkoholrest aufgebaut sind. Claim 4: Lubricating oil additives according to Claim 1, characterized in that the polymeric compounds (B) are built up from polymers or copolymers of acrylic and / or methacrylic acid esters of aliphatic alcohols with up to 8 carbon atoms in the alcohol residue.
DE19691913857 1969-03-19 1969-03-19 Graft copolymer lubricant additives Pending DE1913857A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014746A1 (en) * 1979-02-16 1980-09-03 Röhm Gmbh Lubricating oil additives
EP0635561A2 (en) * 1993-07-23 1995-01-25 Rohm And Haas Company Copolymer useful as viscosity index improving additive for hydraulic fluid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014746A1 (en) * 1979-02-16 1980-09-03 Röhm Gmbh Lubricating oil additives
US4290925A (en) * 1979-02-16 1981-09-22 Rohm Gmbh Lubricating oil additives
EP0635561A2 (en) * 1993-07-23 1995-01-25 Rohm And Haas Company Copolymer useful as viscosity index improving additive for hydraulic fluid
EP0635561A3 (en) * 1993-07-23 1995-06-21 Rohm & Haas Copolymer useful as viscosity index improving additive for hydraulic fluid.

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