EP0122948B1 - Process for producing a metal-soap antifriction layer on a metallized registration layer support - Google Patents

Process for producing a metal-soap antifriction layer on a metallized registration layer support Download PDF

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Publication number
EP0122948B1
EP0122948B1 EP83103905A EP83103905A EP0122948B1 EP 0122948 B1 EP0122948 B1 EP 0122948B1 EP 83103905 A EP83103905 A EP 83103905A EP 83103905 A EP83103905 A EP 83103905A EP 0122948 B1 EP0122948 B1 EP 0122948B1
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European Patent Office
Prior art keywords
metal
layer
lacquer
fatty acids
soap
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EP83103905A
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German (de)
French (fr)
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EP0122948A1 (en
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Marian Dipl.-Ing. Briska
Jürgen D. Dr. Bahr
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IBM Deutschland GmbH
International Business Machines Corp
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IBM Deutschland GmbH
International Business Machines Corp
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Priority to DE8383103905T priority Critical patent/DE3372339D1/en
Priority to EP83103905A priority patent/EP0122948B1/en
Priority to AT83103905T priority patent/ATE28149T1/en
Priority to JP59014580A priority patent/JPS59199288A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24Ablative recording, e.g. by burning marks; Spark recording
    • B41M5/245Electroerosion or spark recording

Definitions

  • the invention relates to a method for producing a sufficiently thick and resistant sliding layer on the surface of an aluminum layer of a recording medium lying over a carrier layer and a lacquer layer, the back of which is also coated with a lacquer layer in which at least one of the two lacquer layers contains a fatty acid or a mixture of Fatty acids is added.
  • a thin layer of finished soap can be applied to the record carrier.
  • this process is very effective and safe, but it requires an additional operation in paper production and allows only a limited control of the layer thickness.
  • a metal diketone or a metal keto ester admixed approximately in a stoichiometric ratio to the fatty acid or the mixture of fatty acids, the hydrogen form of the metal complex has a clear ketoenoltautomerie and that then after coating the material with aluminum in a vacuum, the recording medium is wound up to the roll and stored.
  • An oligomeric fatty acid is used as the fatty acid, which consists of 80 to 90% of dimer, the rest of trimer and tetramer. This process has a number of significant advantages; the rate of the reaction can be influenced, for example, by the choice of the enol concerned and by the choice of the metal.
  • the enolates of the alkali and alkaline earth metals are also chemically stable enough. It has been shown that some requirements cannot be met with this method. In particular, this previously proposed method is not suitable for the use of higher quality enolates of Al, Ti, Mn, Zr, Zn, etc., which are too stable, which results in the formation of thin soap layers.
  • the present invention also aims at the formation of thicker and more resistant soap layers which cannot be produced to a sufficient extent with the method already proposed.
  • the procedure according to the invention is such that a metal alkoxide is selected for converting fatty acids to metal soap that, based on the metal alkoxide addition, 1 to 10% by weight in the wet paint.
  • % of an alkoxide mixture consisting of 1 mol each of Mg (OCH 2 CH 3 ) 2 or At (OCH 2 CH 3 ) 3 .
  • Ti (OCH (CH 3 ) 2 ) 4 and TiC1 4 is admixed, and that after the material has been evaporated with aluminum in a vacuum, the recording medium is then wound up into a roll and stored.
  • the drawing shows a partial sectional view of a recording medium wound into a roll, in particular two superimposed sections of a recording medium, consisting of a substrate 1, e.g. B. of paper, a front-side lacquer layer 2, a metal layer 3 and a rear-side lacquer layer 4.
  • the metal alkoxide mixtures are at the same time effective catalysts for the polymerization of unsaturated fatty acids.
  • the new process for internal soap formation thus represents a high-level conversion of the -COOH groups to a metal soap and then a polymerization or copolymerization of the fatty acid chains to form a resistant coating.
  • the general conditions for this reaction are given within narrow limits, since these are solid-state reactions acts in thin layers without external influence.
  • the reaction temperature should be as much as 20 ° C., the removal of a specific reaction component to achieve higher yields being possible only by diffusion processes.
  • the catalyst is prepared by adding 57 g of Mg (OC 2 H 5 ) 2 and 142 g of tetraisopropyl titanate in 1,000 ml of a mixture of saturated hydrocarbons (boiling point approx. 150 ° C., for example hydrogenated diesel oil fraction) suspended and 95 g of TiCl 4 were added dropwise at 50 ° C. in a pure nitrogen atmosphere within 2 hours.
  • the suspension is decanted with the hydrocarbon mixture at 60 ° C. and washed several times and resuspended in 1,000 ml.
  • Al (CH 2 CH (CH 3 ) 23 triisobutylaluminum is then dissolved in 1,000 ml of the same solvent and 100 ml of it are added dropwise to 100 ml of the above suspension at 100 ° C. and the mixture is stirred for about 3 hours
  • Other inert solvents that have been freed from oxygen and moisture can also be used.
  • the ethyl alcoholates of the alkali metals are particularly flammable, they are always processed in the form of dilute solutions. This offers an elegant solution by adsorbing it on amorphous Si0 2 , which is used as an important filler for the paints, in amounts of 5-20% by weight, which makes handling much safer.
  • the aliphatic alcohol resulting from the reaction should have a high vapor pressure and high diffusibility so that it is quickly removed from the reaction zone.
  • the short chain alcohols meet these conditions better than the long chain ones. The latter are again fewer sensitive to moisture and less flammable.
  • a good compromise is an isopropyl or isobutyl alcoholate.
  • the cis isomers polymerize faster to resinous substances than the trans isomers.
  • the conjugated double bonds are far superior to the non-conjugated ones, also with regard to the quality of the polymer in terms of mechanical resistance, impact resistance and adhesion.
  • the ratio of the alkoxides to the fatty acids should be approximately stoichiometric.
  • the process now has the following very important advantages. A strong polymerization is obtained with targeted control to achieve resistant, non-brittle, partially elastic coatings. Since the alkoxides of higher quality metals are still sufficiently reactive, thicker soap layers are also obtained here.
  • the metal alkoxides are also well compatible with the metal-alkoxy-alkyl chloride complexes, which can act as polymerization catalysts. Many metal alkoxides are also readily soluble in non-polar solvents such as hydrocarbons, chlorinated hydrocarbons and aromatics. Finally, the use of the metal alkoxides also permits the use of fatty acids with conjugated double bonds, possibly in a mixture with dicyclopentadiene, and thus leads to an optimal success in terms of thick and resistant soap layers.

Abstract

1. Method of forming a sufficiently thick and resistant gliding layer on the surface of a record carrier comprising a base material, a lacquer layer, and a top aluminium layer, the back surface of the record carrier being also coated with a lacquer layer, where to one of the two lacquer layers a fatty acid or a mixture of fatty acids is admixed, characterized in that for a conversion of fatty acids into metal soap a metal alkoxide is selected, that relative to the metal alkoxide admixture in the liquid lacquer 1 to 10% by weight of an alkoxide mixture respectively consisting of 1 mol Mg(OCH2 CH3 )2 or Al(OCH2 CH3 )3 , Ti(OCH(CH3 )2 )4 , and TiCl4 is admixed, and that after the aluminium deposition on the material in a vacuum the record carrier material is wound into a roll, and stored.

Description

Die Erfindung betrifft ein Verfahren zum Erzeugen einer hinreichend dicken und widerstandsfähigen Gleitschicht auf der Oberfläche einer über einer Trägerschicht und einer Lackschicht liegenden Aluminiumschicht eines Aufzeichnungsträgers, dessen Rückseite ebenfalls mit einer Lackschicht überzogen ist, bei welchem mindestens einer der beiden Lackschichten eine Fettsäure oder ein Gemisch von Fettsäuren beigemischt ist.The invention relates to a method for producing a sufficiently thick and resistant sliding layer on the surface of an aluminum layer of a recording medium lying over a carrier layer and a lacquer layer, the back of which is also coated with a lacquer layer in which at least one of the two lacquer layers contains a fatty acid or a mixture of Fatty acids is added.

Bei der Aufzeichnung nach dem Metallpapier-Registrierverfahren ist ein ständiger Kontakt zwischen sich relativ zum Aufzeichnungsträger bewegenden Schreibelektroden und der Metalloberfläche des Aufzeichnungsträgers erforderlich. Dadurch werden auf den unbedruckten Stellen des Aufzeichnungsträgers durch die Schreibelektroden verursachte Schleifspuren sichtbar, deren Intensität das Schriftbild empfindlich zu stören vermag.When recording using the metal paper registration method, constant contact between the writing electrodes moving relative to the recording medium and the metal surface of the recording medium is required. As a result, grinding marks caused by the writing electrodes are visible on the unprinted areas of the recording medium, the intensity of which can sensitively disturb the typeface.

Diese Schleifspuren lassen sich durch eine Gleitschicht auf der Aluminiumschicht entscheidend verringern, unter Umständen sogar vollständig unterdrücken. Als Gleitmittel hat sich Seife ganz allgemein als besonders günstig erwiesen. Nicht nur wegen der hervorragenden Gleiteigenschaften von Seife und der Tatsache, daß eine solche Schicht nach der Aufbringung dort stabil erhalten bleibt, sondern weil aufgrund der chemischen Wirkung während des Ausbrennvorgangs die Ablagerung von Verbrennungsrückständen auf den Stirnflächen der Elektroden verhindert wird, welche besonders stark zum Aufreißen der Aluminiumschicht außerhalb der eigentlichen Aufzeichnung und damit zum Erzeugen der Schleifspuren beitragen.These traces of grinding can be significantly reduced by a sliding layer on the aluminum layer, and may even be completely suppressed. Soap has generally proven to be a particularly good lubricant. Not only because of the excellent sliding properties of soap and the fact that such a layer remains stably there after application, but also because of the chemical effect during the burn-out process the deposition of combustion residues on the end faces of the electrodes, which is particularly strong for tearing open, is prevented the aluminum layer outside the actual recording and thus contribute to the creation of the grinding marks.

Man kann an sich eine dünne Schicht fertiger Seife auf dem Aufzeichnungsträger auftragen. Dieses Verfahren ist im Prinzip sehr wirkungsvoll und sicher, erfordert jedoch einen zusätzlichen Arbeitsgang bei der Papierherstellung und erlaubt nur eine begrenzte Kontrolle der Schichtdicke.A thin layer of finished soap can be applied to the record carrier. In principle, this process is very effective and safe, but it requires an additional operation in paper production and allows only a limited control of the layer thickness.

Die interne Bildung einer Seife durch die chemische Reaktion dafür geeigneter Stoffe, welche den Lackschichten beigegeben werden, ist dafür wesentlich besser geeignet. Bei diesen Verfahren sind die Schichtdicken grundsätzlich wesentlich geringer, und es muß darauf geachtet werden, daß durch die Wahl geeigneter Ausgangsstoffe genügend Seife gebildet wird.The internal formation of a soap through the chemical reaction of suitable substances that are added to the lacquer layers is much more suitable for this. In these processes, the layer thicknesses are fundamentally much smaller, and care must be taken to ensure that sufficient soap is formed by the selection of suitable starting materials.

Verfahren dieser Art und ihre Weiterentwicklung sind beispielsweise aus der DE-A-3 007 331 und den darauf aufbauenden DE-A-3 011 591, DE-A-3 040 485 und insbesondere DE-A-3 040 513 bekannt.Methods of this type and their further development are known, for example, from DE-A-3 007 331 and DE-A-3 011 591, DE-A-3 040 485 and in particular DE-A-3 040 513 which build on them.

Die Erfindung beschreitet nunmehr einen völlig anderen Weg. Es hat sich nämlich bei ausgedehnten Versuchen gezeigt, daß es wünschenswert wäre, nicht nur die Dicke der zu erzeugenden Gleitschicht beeinflußbar zu machen, sondern auch eine kompakte Metallseifenschicht zu erzielen, die sich durch besondere Widerstandsfähigkeit auszeichnet. Eine besonders interessante Weiterentwicklung in dieser Richtung ist in der EP-A-83 100 529.3 (16 653) der Anmelderin beschrieben, welche nach Art. 54 (3) u. (4) ebenfalls zum Stand der Technik gehört. In dem dort beschriebenen Verfahren werden einem nassen Lack 0,1 bis ca. 3 Gew. %, bezogen auf den nassen Lack, eines Metalldiketons oder eines Metallketoesters etwa im stöchiometrischen Verhältnis zur Fettsäure bzw. dem Gemisch von Fettsäuren beigemischt, wobei die Wasserstofform des Metallkomplexes eine deutliche Ketoenoltautomerie aufweist und daß dann nach dem Beschichten des Materials mit Aluminium im Vakuum das Aufzeichnungsträgermaterial zur Rolle aufgewickelt und gelagert wird. Dabei wird als Fettsäure eine oligomere Fettsäure verwendet, die zu 80 bis 90 % aus Dimer, der Rest aus Trimer und Tetramer besteht. Dieses Verfahren hat eine Reihe von beachtlichen Vorteilen; man kann beispielsweise dadurch die Geschwindigkeit der Umsetzung durch die Wahl des betreffenden Enols und durch die Auswahl des Metalls beeinflussen. Die Enolate der Alkali- und Erdalkalimetalle sind dabei auch chemisch genügend stabil. Es hat sich gezeigt, daß sich einige Forderungen mit diesem Verfahren nicht erfüllen lassen. Insbesondere eignet sich dieses bereits vorgeschlagene Verfahren nicht für den Einsatz höherwertiger Enolate von Al, Ti, Mn, Zr, Zn, usw., die zu stabil sind, was die Bildung von dünnen Seifenschichten zur Folge hat. Die vorliegende Erfindung zielt ebenfalls auf die Bildung von dickeren und widerstandsfähigen Seifenschichten ab, die sich mit dem bereits vorgeschlagenen Verfahren nicht in ausreichendem Maße herstellen lassen.The invention now takes a completely different path. It has been shown in extensive tests that it would be desirable not only to make it possible to influence the thickness of the sliding layer to be produced, but also to achieve a compact metal soap layer which is distinguished by particular resistance. A particularly interesting further development in this direction is described in EP-A-83 100 529.3 (16 653) by the applicant, which according to Art. 54 (3) u. (4) also belongs to the prior art. In the process described there, 0.1 to approx. 3% by weight, based on the wet paint, of a metal diketone or a metal keto ester is admixed approximately in a stoichiometric ratio to the fatty acid or the mixture of fatty acids, the hydrogen form of the metal complex has a clear ketoenoltautomerie and that then after coating the material with aluminum in a vacuum, the recording medium is wound up to the roll and stored. An oligomeric fatty acid is used as the fatty acid, which consists of 80 to 90% of dimer, the rest of trimer and tetramer. This process has a number of significant advantages; the rate of the reaction can be influenced, for example, by the choice of the enol concerned and by the choice of the metal. The enolates of the alkali and alkaline earth metals are also chemically stable enough. It has been shown that some requirements cannot be met with this method. In particular, this previously proposed method is not suitable for the use of higher quality enolates of Al, Ti, Mn, Zr, Zn, etc., which are too stable, which results in the formation of thin soap layers. The present invention also aims at the formation of thicker and more resistant soap layers which cannot be produced to a sufficient extent with the method already proposed.

Zum Erzeugen einer hinreichend dicken und widerstandsfähigen zähen Gleitschicht dieser Art geht man erfindungsgemäß in der Weise vor, daß für eine Umsetzung von Fettsäuren zu Metallseife ein Metallalkoxyd ausgewählt wird, daß, bezogen auf die Metallalkoxyd-Zugabe, in den nassen Lack 1 bis 10 Gew.% einer Alkoxydmischung, bestehend aus je 1 Mol Mg(OCH2CH3)2 oder At(OCH2CH3)3. Ti(OCH(CH3)2)4 und TiC14 beigemischt wird, und daß dann nach dem Bedampfen des Materials mit Aluminium im Vakuum das Aufzeichnungsträgermaterial zur Rolle aufgewickelt und gelagert wird.To produce a sufficiently thick and resistant tough sliding layer of this type, the procedure according to the invention is such that a metal alkoxide is selected for converting fatty acids to metal soap that, based on the metal alkoxide addition, 1 to 10% by weight in the wet paint. % of an alkoxide mixture consisting of 1 mol each of Mg (OCH 2 CH 3 ) 2 or At (OCH 2 CH 3 ) 3 . Ti (OCH (CH 3 ) 2 ) 4 and TiC1 4 is admixed, and that after the material has been evaporated with aluminum in a vacuum, the recording medium is then wound up into a roll and stored.

Weitere Ausgestaltungen der Erfindung sind den Unteransprüchen im einzelnen zu entnehmen.Further refinements of the invention can be found in the subclaims in detail.

Die Erfindung wird nunmehr anhand von Ausführungsbeispielen im Zusammenhang mit entsprechenden technischen Überlegungen näher erläutert, wobei eine Zeichnung die Erfindung noch verdeutlichen soll.The invention will now be explained in greater detail on the basis of exemplary embodiments in connection with corresponding technical considerations, with a drawing to clarify the invention.

Die Zeichnung zeigt dabei eine Teilschnittansicht aus einem zu einer Rolle aufgewickelten Aufzeichnungsträger, insbesondere zwei übereinanderliegende Abschnitte eines Aufzeichnungsträgers, bestehend aus einem Substrat 1, z. B. aus Papier, einer Vorderseiten-Lackschicht 2, einer Metallschicht 3 und einer Rückseiten-Lackschicht 4.The drawing shows a partial sectional view of a recording medium wound into a roll, in particular two superimposed sections of a recording medium, consisting of a substrate 1, e.g. B. of paper, a front-side lacquer layer 2, a metal layer 3 and a rear-side lacquer layer 4.

Diese beiden Bahnen des Aufzeichnungsträgers liegen so eng aneinander, daß sich eine innige Berührung zwischen der Metallschicht der unteren Bahn und der Rückseiten-Lackschicht der oberen Bahn ergibt.These two tracks of the record carrier are so close together that there is an intimate one Contact between the metal layer of the lower sheet and the rear lacquer layer of the upper sheet results.

Wenn nun die beiden Lackschichten gemäß der Erfindung behandelt sind, dann kommt es nach dem Aufwickeln zur Rolle durch Diffusion der beiden Komponenten in entgegengesetzter Richtung zur Vermischung und damit zu einer Reaktion zwischen der Fettsäure und dem Gemisch von Metallalkoxyden (Metallalkoholaten).If the two lacquer layers are now treated according to the invention, then after the reeling, the roll by diffusion of the two components in the opposite direction results in mixing and thus a reaction between the fatty acid and the mixture of metal alkoxides (metal alcoholates).

Die Metallalkoxydgemische sind dabei gleichzeitig wirkungsvolle Katalysatoren für die Polymerisation ungesättigter Fettsäuren. Das neue Verfahren zur internen Seifenbildung stellt also eine hochgradige Umsetzung der -COOH Gruppen zu einer Metallseife und anschließend eine Polymerisation bzw. Copolymerisation der Fettsäureketten zu einem widerstandsfähigen Überzug dar. Die Rahmenbedingungen für diese Reaktion sind in engen Grenzen vorgegeben, da es sich hier um Festkörperreaktionen in dünnen Schichten ohne äußere Einflußnahme handelt. Hier soll beispielsweise die Reaktionstemperatur möglichst bei 20 °C liegen, wobei das Entfernen einer bestimmten Reaktionskomponente zur Erzielung höherer Ausbeuten nur durch Diffusionsvorgänge möglich ist.The metal alkoxide mixtures are at the same time effective catalysts for the polymerization of unsaturated fatty acids. The new process for internal soap formation thus represents a high-level conversion of the -COOH groups to a metal soap and then a polymerization or copolymerization of the fatty acid chains to form a resistant coating. The general conditions for this reaction are given within narrow limits, since these are solid-state reactions acts in thin layers without external influence. Here, for example, the reaction temperature should be as much as 20 ° C., the removal of a specific reaction component to achieve higher yields being possible only by diffusion processes.

Bei der Herstellung des Katalysators geht man so vor, daß man in 1 000 ml eines Gemisches aus gesättigten Kohlenwasserstoffen (Siedepunkt ca. 150 °C, z. B. hydrierte Dieselölfraktion) 57 g Mg (OC2H5)2 und 142 g Tetraisopropyltitanat suspendiert und innerhalb 2 Stunden 95 g TiCl4 bei 50 °C in reiner Stickstoff-Atmosphäre zutropft. Die Suspension wird mit dem Kohlenwasserstoffgemisch bei 60 °C dekantiert und mehrmals gewaschen und wieder in 1 000 ml suspendiert.The catalyst is prepared by adding 57 g of Mg (OC 2 H 5 ) 2 and 142 g of tetraisopropyl titanate in 1,000 ml of a mixture of saturated hydrocarbons (boiling point approx. 150 ° C., for example hydrogenated diesel oil fraction) suspended and 95 g of TiCl 4 were added dropwise at 50 ° C. in a pure nitrogen atmosphere within 2 hours. The suspension is decanted with the hydrocarbon mixture at 60 ° C. and washed several times and resuspended in 1,000 ml.

In ebenfalls 1 000 ml des gleichen Lösungsmittels werden anschließend ca. 0,1 Mol AI (CH2CH(CH3)23 = Triisobutylaluminium gelöst und 100 ml davon zu 100 ml der obigen Suspension bei 100 °C zugetropft und ca. 3 Stunden gerührt. Man kann auch andere inerte Lösungsmittel verwenden, die von Sauerstoff und Feuchtigkeit befreit worden sind.About 0.1 mol of Al (CH 2 CH (CH 3 ) 23 = triisobutylaluminum is then dissolved in 1,000 ml of the same solvent and 100 ml of it are added dropwise to 100 ml of the above suspension at 100 ° C. and the mixture is stirred for about 3 hours Other inert solvents that have been freed from oxygen and moisture can also be used.

In unserem Beispiel der Erzeugung einer AI-Seifenschicht auf dem Aufzeichnungsträger werden 1 kg des AI- isopropylates und zwischen 40-400 ml des obigen Katalysatorgemisches in ca. 100 kg nassen Lack vor der Papierbeschichtung eingerührt.In our example of producing an Al soap layer on the recording medium, 1 kg of the Al isopropylate and between 40-400 ml of the above catalyst mixture are stirred into about 100 kg of wet lacquer before the paper coating.

Da insbesondere die Äthylalkoholate der Alkalimetalle leicht brennbar sind, werden sie stets in Form verdünnter Lösungen verarbeitet. Hier bietet sich eine elegante Lösung, indem man diese an amorphem Si02, das als wichtiger Füllstoff für die Lacke verwendet wird, in Mengen von 5-20 Gew. % adsorbiert, wodurch die Handhabung viel sicherer wird.Since the ethyl alcoholates of the alkali metals are particularly flammable, they are always processed in the form of dilute solutions. This offers an elegant solution by adsorbing it on amorphous Si0 2 , which is used as an important filler for the paints, in amounts of 5-20% by weight, which makes handling much safer.

Vom thermodynamischen Standpunkt her ist die Reaktion zwischen den Fettsäuren und den Me-Alkoxyden stark exotherm, d. h., die Seifenbildung wird stark begünstigt:

  • Die Fettsäure ist zwar eine schwache Säure mit einer Aciditätskonstante von 10-6, pKA(Fet) = 6, doch ist das Alkoxyd als starke Base anzusehen :
    Figure imgb0001
From a thermodynamic point of view, the reaction between the fatty acids and the Me alkoxides is highly exothermic, ie, the formation of soaps is greatly promoted:
  • The fatty acid is a weak acid with an acidity constant of 10- 6 , pK A (Fet) = 6, but the alkoxide is to be regarded as a strong base:
    Figure imgb0001

Die Aciditätskonstante ist 10-17, pKA(Alkoxyd) = 17The acidity constant is 10 -17 , pK A (alkoxide) = 17

Die resultierende Konstante der Reaktion ist

Figure imgb0002
The resulting constant of the reaction is
Figure imgb0002

Die freie Energie steht zu pK in folgender Beziehung :

  • ΔG = - 2,3 RT logK = 1,4 pK in kcal/mol bei 20 °C
  • d. h., ΔG = 1,4 (- 11) = - 15.4 kcal/mol.
The free energy has the following relationship to pK:
  • ΔG = - 2.3 RT logK = 1.4 pK in kcal / mol at 20 ° C
  • ie, ΔG = 1.4 (- 11) = - 15.4 kcal / mol.

Bei der Reaktion zwischen der Fettsäure und dem Me-Alkoxyd werden also 15,4 kcal/mol frei : Je negativer der Betrag der freien Energie, desto größer die Antriebskraft der Reaktion.In the reaction between the fatty acid and the Me alkoxide, 15.4 kcal / mol are released: the more negative the amount of free energy, the greater the driving force of the reaction.

Die Gesamt-Reaktion lautet :

Figure imgb0003
The overall response is:
Figure imgb0003

Der durch die Reaktion entstandene aliphatische Alkohol sollte einen hohen Dampfdruck sowie hohe Diffusionsfähigkeit aufweisen, damit er rasch aus der Reaktionszone entfernt wird. Die kurzkettigen Alkohole erfüllen diese Bedingungen besser als die langkettigen. Die letzteren sind wiederum weniger feuchtigkeitsempfindlich und weniger brennbar. Ein guter Kompromiß ist ein Isopropyl- oder Isobutylalkoholat.The aliphatic alcohol resulting from the reaction should have a high vapor pressure and high diffusibility so that it is quickly removed from the reaction zone. The short chain alcohols meet these conditions better than the long chain ones. The latter are again fewer sensitive to moisture and less flammable. A good compromise is an isopropyl or isobutyl alcoholate.

Um die Wirksamkeit des Metallalkoxyd-Katalysatorsystems zu erhöhen, werden außer den üblichen gesättigten und ungesättigten bzw. oligomeren Fettsäuren spezielle Fettsäuregemische mit 3 konjugierten Doppelbindungen verwendet :

  • Licansäure
    Figure imgb0004
    Figure imgb0005
    die zu 75 % im Oiticaca-ÖI zusammen mit 10 % Linolsäure enthalten ist und die
  • Eläostearinsäure
    Figure imgb0006
    Figure imgb0007
    die zu ca. 80 % im Tung-Öl zusammen mit ca. 15 % Ölsäure enthalten ist. Der Rest besteht in beiden Fällen aus gesättigten Fettsäuren.
In order to increase the effectiveness of the metal alkoxide catalyst system, special fatty acid mixtures with 3 conjugated double bonds are used in addition to the usual saturated and unsaturated or oligomeric fatty acids:
  • Licanoic acid
    Figure imgb0004
    Figure imgb0005
    which is contained in the Oiticaca oil to 75% together with 10% linoleic acid and the
  • Elaestearic acid
    Figure imgb0006
    Figure imgb0007
    80% of it is contained in the tung oil together with approx. 15% oleic acid. The rest in both cases consists of saturated fatty acids.

Die cis-Isomere polymerisieren schneller zu harzartigen Stoffen als die trans-Isomere. Die konjugierten Doppelbindungen sind den nichtkonjugierten weitaus überlegen, auch was die Qualität des Polymerisates bezüglich mechanischer Widerstandsfähigkeit, Schlagfestigkeit und Haftung betrifft.The cis isomers polymerize faster to resinous substances than the trans isomers. The conjugated double bonds are far superior to the non-conjugated ones, also with regard to the quality of the polymer in terms of mechanical resistance, impact resistance and adhesion.

Zur Verbesserung dieser Eigenschaften werden zu den obigen Säuregemischen einige Teile vonTo improve these properties, some parts of

Dicyclopentadien

Figure imgb0008
beigemischt. Dadurch lassen sich die mechanischen Eigenschaften der polymeren Metallseifenschichten in der gewünschten Weise variieren, so daß die Schichten eine gewisse Elastizität beibehalten.Dicyclopentadiene
Figure imgb0008
added. As a result, the mechanical properties of the polymeric metal soap layers can be varied in the desired manner, so that the layers retain a certain elasticity.

Das Verhältnis der Alkoxyde zu den Fettsäuren soll etwa stöchiometrisch sein.The ratio of the alkoxides to the fatty acids should be approximately stoichiometric.

Das Verfahren hat nun folgende sehr wichtige Vorteile. Man erhält eine starke Polymerisation mit gezielter Steuerung zur Erzielung von widerstandsfähigen, nicht spröden, teilweise elastischen Überzügen. Da die Alkoxyde höherwertiger Metalle noch genügend reaktionsfähig sind, erhält man auch hier dickere Seifenschichten. Die Metallalkoxyde sind auch gut verträglich mit den Metall-Alkoxy-AlkylChlorid-Komplexen, die als Polymerisations-Katalysatoren wirken können. Viele Metallalkoxyde sind außerdem auch in unpolaren Lösungsmitteln wie Kohlenwasserstoffen, chlorierten Kohlenwasserstoffen und Aromaten gut löslich. Schließlich gestattet die Verwendung der Metallalkoxyde auch die Verwendung von Fettsäuren mit konjugierten Doppelbindungen, ggf. im Gemisch mit Dicyclopentadien, und führt damit zu einem optimalen Erfolg, was dicke und widerstandsfähige Seifenschichten angeht.The process now has the following very important advantages. A strong polymerization is obtained with targeted control to achieve resistant, non-brittle, partially elastic coatings. Since the alkoxides of higher quality metals are still sufficiently reactive, thicker soap layers are also obtained here. The metal alkoxides are also well compatible with the metal-alkoxy-alkyl chloride complexes, which can act as polymerization catalysts. Many metal alkoxides are also readily soluble in non-polar solvents such as hydrocarbons, chlorinated hydrocarbons and aromatics. Finally, the use of the metal alkoxides also permits the use of fatty acids with conjugated double bonds, possibly in a mixture with dicyclopentadiene, and thus leads to an optimal success in terms of thick and resistant soap layers.

Claims (7)

1. Method of forming a sufficiently thick and resistant gliding layer on the surface of a record carrier comprising a base material, a lacquer layer, and a top aluminium layer, the back surface of the record carrier being also coated with a lacquer layer, where to one of the two lacquer layers a fatty acid or a mixture of fatty acids is admixed, characterized in that for a conversion of fatty acids into metal soap a metal alkoxide is selected, that relative to the metal alkoxide admixture in the liquid lacquer 1 to 10 % by weight of an alkoxide mixture respectively consisting of 1 mol Mg(OCH2CH3)2 or AI(OCH2CH3)3, Ti(OCH(CH3)2)4, and TiCl4 is admixed, and that after the aluminium deposition on the material in a vacuum the record carrier material is wound into a roll, and stored.
2. Method as claimed in claim 1, characterized in that the metal alkoxide is selected from the group consisting of isopropylates, butylates, or isobutylates of Al, Ba, Ca, Mn or Zr, or their mixtures.
3. Method as claimed in claim 1, characterized by the use of a metal organic complex available on the basis of Ti-AI or Ti-AI-Mg in the form of metal-alkoxy-alkyl-chlorides.
4. Method as claimed in claim 1, characterized in that fatty acids with three conjugated double bonds as e.g. licanic acid and eleostearic acid are used.
5. Method as claimed in claim 4, characterized in that dicyclopentadiene is admixed to the said fatty acids.
6. Method as claimed in any one of claims 1 to 5, characterized in that the ratio of the metal alkoxide to the fatty acid mixtures is approximately stoichiometric.
7. Method as claimed in claim 1, characterized in that the metal alkoxides are adsorbed in amorphous Si02 which is then added to the lacquer as a filler.
EP83103905A 1983-04-21 1983-04-21 Process for producing a metal-soap antifriction layer on a metallized registration layer support Expired EP0122948B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8383103905T DE3372339D1 (en) 1983-04-21 1983-04-21 Process for producing a metal-soap antifriction layer on a metallized registration layer support
EP83103905A EP0122948B1 (en) 1983-04-21 1983-04-21 Process for producing a metal-soap antifriction layer on a metallized registration layer support
AT83103905T ATE28149T1 (en) 1983-04-21 1983-04-21 PROCESS FOR CREATING A METAL SOAP LAYER AS A SLIDING LAYER ON A METALLIZED RECORDING CARRIER.
JP59014580A JPS59199288A (en) 1983-04-21 1984-01-31 Method of forming sliding layer on surface of recording carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83103905A EP0122948B1 (en) 1983-04-21 1983-04-21 Process for producing a metal-soap antifriction layer on a metallized registration layer support

Publications (2)

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EP0122948A1 EP0122948A1 (en) 1984-10-31
EP0122948B1 true EP0122948B1 (en) 1987-07-08

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EP (1) EP0122948B1 (en)
JP (1) JPS59199288A (en)
AT (1) ATE28149T1 (en)
DE (1) DE3372339D1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032223A1 (en) * 1980-08-27 1982-04-01 Ibm Deutschland Gmbh, 7000 Stuttgart METHOD FOR REDUCING OR COMPLETELY ELIMINATING SAND OR SCRATCHES ON METAL PAPER
DE3017450A1 (en) * 1980-05-07 1981-11-12 Robert Bosch Gmbh, 7000 Stuttgart RECORD CARRIER FOR REGISTRATION DEVICES
JPS5831109B2 (en) * 1980-07-12 1983-07-04 インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション Method of manufacturing latsuka
DE3032427A1 (en) * 1980-08-28 1982-04-01 Ibm Deutschland Gmbh, 7000 Stuttgart RECORD CARRIER FOR ELECTRIC EROSION PRINTERS AND METHOD FOR THE PRODUCTION THEREOF
DE3033069A1 (en) * 1980-09-03 1982-04-22 Ibm Deutschland Gmbh, 7000 Stuttgart RECORD CARRIER FOR ELECTRIC EROSION PRINTER
DE3171700D1 (en) * 1981-08-21 1985-09-12 Ibm Deutschland Process for preparing compact coating of lacquers for recording materials

Also Published As

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DE3372339D1 (en) 1987-08-13
EP0122948A1 (en) 1984-10-31
JPS59199288A (en) 1984-11-12
ATE28149T1 (en) 1987-07-15

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