WO1995002643A1 - Microcapsule-containing printing inks for indirect letterpress printing - Google Patents
Microcapsule-containing printing inks for indirect letterpress printing Download PDFInfo
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- WO1995002643A1 WO1995002643A1 PCT/EP1994/002102 EP9402102W WO9502643A1 WO 1995002643 A1 WO1995002643 A1 WO 1995002643A1 EP 9402102 W EP9402102 W EP 9402102W WO 9502643 A1 WO9502643 A1 WO 9502643A1
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- printing
- printing inks
- weight
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- microcapsules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
- B41M5/1246—Application of the layer, e.g. by printing
Definitions
- the present invention relates to new printing inks for indirect letterpress printing which contain microcapsules containing color formers, water, binders, organic solvents and, if appropriate, further additives customary for letterpress inks.
- the invention relates to a method for producing pressure-sensitive, carbon-free transmission systems based on the technique of indirect letterpress using these printing inks.
- Reaction copy papers are well known. Their mode of operation consists in that a color-forming component, which is usually dissolved in organic solvent and encased in a microcapsule, and a color-developing component are brought into contact with one another and thereby react to form a color.
- a color-forming component which is usually dissolved in organic solvent and encased in a microcapsule
- a color-developing component are brought into contact with one another and thereby react to form a color.
- encapsulated color former and developer are applied together in one layer to the carrier material, generally paper.
- Multilayer systems usually consist of two or more sheets of paper lying one on top of the other, in which a donor layer containing microcapsules is applied to the back of the top sheet and a receiver layer containing the developer is applied to the front of each sheet underneath. In both cases, the microcapsules are destroyed by the pressure when writing, and a copy is produced by the reaction of the color former and color developer.
- printing inks for indirect letterpress printing which contain microcapsules containing color formers, water, binder, organic solvent and, if appropriate, other additives customary for letterpress printing inks.
- the printing inks according to the invention generally contain 1 to 30% by weight, preferably 5 to 20% by weight, of water.
- the content of microcapsules is generally 20 to 20 45% by weight, preferably 30 to 40% by weight.
- Suitable materials for the microcapsules for the printing inks according to the invention are the generally known materials, e.g. those based on gelatin, especially those based on po-
- polymers such as polyacrylates, polyamides, polyurethanes, polysulfonamides and polyesters, polyadducts, e.g. of polyisocyanates and polyamines and in particular of polycondensation products such as formaldehyde condensates.
- polymers such as polyacrylates, polyamides, polyurethanes, polysulfonamides and polyesters, polyadducts, e.g. of polyisocyanates and polyamines and in particular of polycondensation products such as formaldehyde condensates.
- polymers such as polyacrylates, polyamides, polyurethanes, polysulfonamides and polyesters, polyadducts, e.g. of polyisocyanates and polyamines and in particular of polycondensation products such as formaldehyde condensates.
- polycondensation products such as formaldehyde condensates.
- formaldehyde condensates include phenol
- Suitable color formers for the printing inks according to the invention are the compounds which are usually used and which develop color in contact with an acid.
- Examples include triphenylmethanes, diphenylmethanes, xanthenes, in particular fluoranes and rhodamine lactams, thiazines and spiropyrans, which can be used individually or in the form of mixtures.
- core oils used as solvents for the color former also correspond to the prior art.
- examples include chlorinated diphenyl, chlorinated paraffin, cottonseed oil, peanut oil, silicone oil, phthalate esters, phosphate esters, sulfonate esters, monochlorobenzene, partially hydrogenated terphenyls, alkylated di-
- Suitable binders are the compounds conventionally used for such printing inks and compiled, for example, in "The Printing Ink Manual", 4th Ed., 1988, Van Nostrand Reinhold, London.
- Examples are natural resins such as rosin, resinates, shellac and asphalts, synthetic resins such as phenolic resins, phenol-modified rosins, alkyd resins, terpene resins, polyamide resins, polyimide resins, polyacrylates and methacrylates, chlorinated rubber, vinyl ester resins, hydrocarbon resins and oleophilic resins and oleophilic resins semi-drying oils and litho varnishes based on linseed oil and suitable mixtures of these compounds.
- natural resins such as rosin, resinates, shellac and asphalts
- synthetic resins such as phenolic resins, phenol-modified rosins, alkyd resins, terpene resins, polyamide resins, polyimide resins, polyacrylates and methacrylates, chlorinated rubber, vinyl ester resins, hydrocarbon resins and oleophilic resins and oleophilic resins semi-drying oils and litho varnishes
- the printing inks according to the invention generally contain about 5 to 30% by weight, preferably 3 to 20% by weight, of binder.
- Suitable solvents for the printing inks according to the invention are the solvents known to be used for such purposes. Please also refer to "The Printing Manual". Suitable examples are: alcohols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, pentanol, isopentanol, neopentanol, hexanol, 2-ethyl-1, 3-hexanediol and glycerol; Glycols such as 1,2-ethylene glycol, 1,2- and 1,3-propylene glycol and 1,2-, 2,3- and 1,4-butylene glycol; Ether alcohols such as di- and triethylene glycol, ethylene glycol monomethyl and ethyl ether, 3-methoxypropanol and 3-isopropoxypropanol; Ethers such as methyl tert-butyl ether, tetrahydrofuran and dioxane
- the printing inks according to the invention generally contain about 15 to 60% by weight, preferably 20 to 40% by weight, of organic solvent.
- the printing inks according to the invention can contain other additives customary for printing inks and known to the person skilled in the art, such as waxes, drying agents, gelling agents, antioxidants, surface-active auxiliaries, deodorants, defoamers, and dyes and pigments (for example titanium dioxide) for coloring.
- additives customary for printing inks such as waxes, drying agents, gelling agents, antioxidants, surface-active auxiliaries, deodorants, defoamers, and dyes and pigments (for example titanium dioxide) for coloring.
- spacers which counteract the destruction of the microcapsules when the printing ink is rubbed in and during the printing process itself, and which enable the prints to have high rubbing fastness.
- Suitable spacers are known to be e.g. Cellulose fibers and calibrated starch. However, other substances such as the solid melamine balls described in DE-A-39 35 111 can also be used for this purpose.
- the spacers are generally used in amounts of up to 15% by weight, preferably 5 to 10% by weight, based on the printing ink.
- the procedure is expediently such that the binder is first dissolved in the solvent and the other constituents are then stirred in.
- microcapsules can be used in dry form as microcapsule powder or as an aqueous dispersion. Depending on the water content required for the finished printing ink, one or the other procedure is preferable. If necessary, excess water can also be evaporated in a vacuum.
- the printing inks according to the invention are, even with high microcapsule contents of generally> 30% by weight, of low viscosity and can therefore be printed without problems. Another advantage is that, due to the possible higher microcapsule contents, lower thicknesses of the layers to be applied of approximately 4 to 6 ⁇ m are sufficient to obtain copies of the desired intensity.
- the printing inks according to the invention can advantageously be used according to the technique of indirect letterpress printing (or dry offset printing) for the production of two- or multi-component reaction carbonless papers. It is surprising that the printing inks according to the invention can also be used with high water contents of about> 10% by weight while achieving excellent printing results.
- the ink is preferably applied via a few (i.e. about 3 to 5) ink rollers.
- a variant of the printing process according to the invention is that the printing ink is transferred from the dampening unit and not from the inking unit.
- the acidic compounds such as acidic clays, for example montmorillonites, smectites and especially bentonites and phenols, which are commonly used, can be used as color-developing substances for the receiver layers of the carbonless papers.
- naphthenic oil 5.7% by weight of hydrocarbon resin (Sheboffset 68140; DSM Resins, NL) 30.8% by weight of glycerin 15 1.8% by weight of terpene oil
- alkyd resin Sovernol® KA 3089; Henkel
- aluminum silicate bentonite
- microcapsule powder microcapsules based on melamine / formaldehyde according to EP-A-26 914, containing black color-developing color formers
- the printing ink obtained was applied in indirect letterpress printing (dry offset printing) in an amount of 5 g / m 2 to base paper (50 g / m 2 ).
- legible documents were also obtained.
Abstract
Printing inks for indirect letterpress printing contain microcapsules that contain colour generating agents, water, binders, an organic solvent and if required other usual additives for letterpress printing inks.
Description
Mikrokapseln enthaltende Druckfarben für den indirekten BuchdruckPrinting inks containing microcapsules for indirect letterpress printing
Beschreibungdescription
Die vorliegende Erfindung betrifft neue Druckfarben für den indi¬ rekten Buchdruck, die Farbbildner enthaltende Mikrokapseln, Was¬ ser, Bindemittel, organisches Lösungsmittel und gegebenenfalls weitere für Buchdruckfarben übliche Zusatzstoffe enthalten.The present invention relates to new printing inks for indirect letterpress printing which contain microcapsules containing color formers, water, binders, organic solvents and, if appropriate, further additives customary for letterpress inks.
Außerdem betrifft die Erfindung ein Verfahren zur Herstellung von druckempfindlichen, kohlefreien ÜbertragungsSystemen nach der Technik des indirekten Buchdrucks unter Verwendung dieser Druck¬ farben.In addition, the invention relates to a method for producing pressure-sensitive, carbon-free transmission systems based on the technique of indirect letterpress using these printing inks.
Reaktionsdurchschreibepapiere sind wohlbekannt. Ihre Funktions¬ weise besteht darin, daß eine farbbildende Komponente, die in der Regel in organischem Lösungsmittel gelöst und von einer Mikrokap- sel umhüllt vorliegt, und eine farbentwickelnde Komponente mit- einander in Kontakt gebracht werden und dabei unter Farbbildung reagieren. Bei einschichtigen Systemen, sogenannten Einkompo- nenten-Reaktionsdurchschreibepapieren, sind verkapselter Farb¬ bildner und Entwickler gemeinsam in einer Schicht auf das Träger¬ material, in der Regel Papier, aufgebracht. Mehrschichtige Sy- steme bestehen üblicherweise aus zwei oder mehreren aufeinander- liegenden Papierblättern, bei denen auf die Rückseite des oben liegenden Blattes eine Mikrokapseln enthaltende Geberschicht und auf die Vorderseite des jeweils darunter liegenden Blattes eine den Entwickler enthaltende Nehmerschicht aufgebracht ist. In bei- den Fällen werden die Mikrokapseln durch die Druckeinwirkung beim Beschreiben zerstört, und durch Reaktion von Farbbildner und Farbentwickler entsteht eine Durchschrift.Reaction copy papers are well known. Their mode of operation consists in that a color-forming component, which is usually dissolved in organic solvent and encased in a microcapsule, and a color-developing component are brought into contact with one another and thereby react to form a color. In the case of single-layer systems, so-called one-component carbonless copying papers, encapsulated color former and developer are applied together in one layer to the carrier material, generally paper. Multilayer systems usually consist of two or more sheets of paper lying one on top of the other, in which a donor layer containing microcapsules is applied to the back of the top sheet and a receiver layer containing the developer is applied to the front of each sheet underneath. In both cases, the microcapsules are destroyed by the pressure when writing, and a copy is produced by the reaction of the color former and color developer.
In der EP-A 37 4'77 und der älteren deutschen Patentanmeldung DE-A 42 35 788 ist die Herstellung dieser Übertragungssysteme nach der Buch- oder Offsetdrucktechnik unter Verwendung die Mi¬ krokapseln enthaltender Druckfarben beschrieben. In beiden Fällen werden, wie für den Offsetdruck üblich, wasserfreie Druckfarben verwendet. Dabei sind Druckfarben mit höheren Mikrokapselgehalten von etwa 20 bis 25 Gew.-% in der Regel zu viskos für eine Anwen¬ dung. Um ausreichend intensive Durchschriften zu erzielen, muß die Druckfarbe daher in hohen Schichtdicken von etwa > 6 μm aufge¬ bracht werden.
Der Erfindung lag daher die Aufgabe zugrunde, Druckfarben bereit¬ zustellen, welche die genannten Nachteile nicht aufweisen, und eine vorteilhafte Herstellung von Reaktionsdurchschreibepapieren ermöglichen. 5In EP-A 37 4 '77 and the earlier German patent application DE-A 42 35 788 the production of these transmission systems according to the letterpress or offset printing technique using the Mi¬ krokapseln containing ink described. In both cases, as is usual for offset printing, water-free printing inks are used. Printing inks with higher microcapsule contents of about 20 to 25% by weight are generally too viscous for an application. In order to achieve sufficiently intensive copies, the printing ink must therefore be applied in high layer thicknesses of approximately> 6 μm. The invention was therefore based on the object of providing printing inks which do not have the disadvantages mentioned and which make it possible to advantageously produce reaction carbonless papers. 5
Demgemäß wurden Druckfarben für den indirekten Buchdruck gefun¬ den, die Farbbildner enthaltende Mikrokapseln, Wasser, Bindemit¬ tel, organisches Lösungsmittel und gegebenenfalls weitere für Buchdruckfarben übliche Zusatzstoffe enthalten.Accordingly, printing inks for indirect letterpress printing have been found which contain microcapsules containing color formers, water, binder, organic solvent and, if appropriate, other additives customary for letterpress printing inks.
1010
Außerdem wurde ein Verfahren zur Herstellung von druckempfindli¬ chen, kohlefreien Übertragungssystemen nach der Technik des indi¬ rekten Buchdrucks gefunden, welches dadurch gekennzeichnet ist, daß man hierfür diese Druckfarben verwendet.In addition, a process for the production of pressure-sensitive, carbon-free transmission systems according to the technique of indirect letterpress printing has been found, which is characterized in that these printing inks are used for this.
1515
Die erfindungsgemäßen Druckfarben enthalten in der Regel 1 bis 30 Gew.-%, bevorzugt 5 bis 20 Gew.-% Wasser.The printing inks according to the invention generally contain 1 to 30% by weight, preferably 5 to 20% by weight, of water.
Der Gehalt an Mikrokapseln beträgt im allgemeinen 20 bis 20 45 Gew.-%, vorzugsweise 30 bis 40 Gew.-%.The content of microcapsules is generally 20 to 20 45% by weight, preferably 30 to 40% by weight.
Als Material für die Mikrokapseln eignen sich für die erfindungs¬ gemäßen Druckfarben die allgemein bekannten Materialien, z.B. solche auf Basis von Gelatine, vor allem solche auf Basis von Po-Suitable materials for the microcapsules for the printing inks according to the invention are the generally known materials, e.g. those based on gelatin, especially those based on po-
25 lymeren wie Polyacrylaten, Polyamiden, Polyurethanen, Polysulfo- namiden und Polyestern, Polyadditionsprodukten, z.B. von Polyiso- cyanaten und Polyaminen und insbesondere von Polykondensations- produkten wie Formaldehydkondensaten. Unter diesen sind neben Phenol/Formaldehyd- und Harnstoff/Formaldehydkondensaten die aus25 polymers such as polyacrylates, polyamides, polyurethanes, polysulfonamides and polyesters, polyadducts, e.g. of polyisocyanates and polyamines and in particular of polycondensation products such as formaldehyde condensates. These include phenol / formaldehyde and urea / formaldehyde condensates
30 der EP-A-26 914 bekannten Melamin/Formaldehyd-Kondensate beson¬ ders bevorzugt.30 of the melamine / formaldehyde condensates known from EP-A-26 914 are particularly preferred.
Als Farbbildner sind für die erfindungsgemäßen Druckfarben die üblicherweise eingesetzten Verbindungen geeignet, die in Kontakt 35 mit einer Säure Farbe entwickeln. Als Beispiele seien Triphenyl- methane, Diphenylmethane, Xanthene, insbesondere Fluorane und Rhodaminlactame, Thiazine und Spiropyrane genannt, die einzeln oder in Form von Mischungen verwendet werden können.Suitable color formers for the printing inks according to the invention are the compounds which are usually used and which develop color in contact with an acid. Examples include triphenylmethanes, diphenylmethanes, xanthenes, in particular fluoranes and rhodamine lactams, thiazines and spiropyrans, which can be used individually or in the form of mixtures.
40 Die als Lösungsmittel für den Farbbildner eingesetzten sog. Kern¬ öle entsprechen ebenfalls dem Stand der Technik. Beispielhaft seien chloriertes Diphenyl, chloriertes Paraffin, Baumwollsamen- öl, Erdnußöl, Silikonöl, Phthalatester, Phosphatester, Sulfonat- ester, Monochlorbenzol, teilhydrierte Terphenyle, alkylierte Di-The so-called core oils used as solvents for the color former also correspond to the prior art. Examples include chlorinated diphenyl, chlorinated paraffin, cottonseed oil, peanut oil, silicone oil, phthalate esters, phosphate esters, sulfonate esters, monochlorobenzene, partially hydrogenated terphenyls, alkylated di-
45 phenyle, alkylierte Naphthaline, Arylether, Arylalkylether und höher alkyliertes Benzol aufgeführt.
Als Bindemittel kommen die üblicherweise für solche Druckfarben eingesetzten und beispielsweise in "The Printing Ink Manual", 4th Ed., 1988, Van Nostrand Reinhold, London, zusammengestellten Verbindungen in Betracht. Beispiele sind natürliche Harze wie Ko- lophonium, Resinate, Schellack und Asphalte, synthetische Harze wie Phenolharze, phenolmodifizierte Kolophoniumharze, Alkydharze, Terpenharze, Polyamidharze, Polyimidharze, Polyacrylate und -methacrylate, chlorierte Gummi, Vinylesterharze, Kohlenwasser¬ stoffharze und oleophile Harze wie trocknende und halbtrocknende Öle und Lithofirnisse auf Basis von Leinöl sowie geeignete Mischungen dieser Verbindungen.45 phenyls, alkylated naphthalenes, aryl ethers, aryl alkyl ethers and higher alkylated benzene listed. Suitable binders are the compounds conventionally used for such printing inks and compiled, for example, in "The Printing Ink Manual", 4th Ed., 1988, Van Nostrand Reinhold, London. Examples are natural resins such as rosin, resinates, shellac and asphalts, synthetic resins such as phenolic resins, phenol-modified rosins, alkyd resins, terpene resins, polyamide resins, polyimide resins, polyacrylates and methacrylates, chlorinated rubber, vinyl ester resins, hydrocarbon resins and oleophilic resins and oleophilic resins semi-drying oils and litho varnishes based on linseed oil and suitable mixtures of these compounds.
Die erfindungsgemäßen Druckfarben enthalten im allgemeinen etwa 5 bis 30 Gew.-%, bevorzugt 3 bis 20 Gew.-% Bindemittel.The printing inks according to the invention generally contain about 5 to 30% by weight, preferably 3 to 20% by weight, of binder.
Für die erfindungsgemäßen Druckfarben kommen als Lösungsmittel die bekanntermaßen für solche Zwecke eingesetzten Lösungsmittel in Frage. Hier sei ebenfalls auf "The Printing Manual" verwiesen. Als geeignete Beispiele seien genannt: Alkohole wie Methanol, Ethanol, Propanol, Isopropanol, Butanol, Isobutanol, sec- Butanol, Pentanol, Isopentanol, Neopentanol, Hexanol, 2-Ethyl-l,3-hexandiol und Glycerin; Glykole wie 1,2-Ethylen- glykol, 1,2- und 1,3-Propylenglykol und 1,2-, 2,3- und 1,4-Butylenglykol; Etheralkohole wie Di- und Triethylenglykol, Ethylenglykolmonomethyl- und -ethylether, 3-Methoxypropanol und 3-Isopropoxypropanol; Ether wie Methyl-tert.-butylether, Tetra- hydrofuran und Dioxan; Ketone wie Aceton und Methylethylketon; Ketoalkohole wie Diacetonalkohol; Alkoholamine wie Triethanol- amin; Ester wie Essigsäureethyl-, -propyl- und -butylester; ali- phatische und aromatische Kohlenwasserstoffe wie Pentan, Hexan, Heptan, Octan, Isooctan, Petrolether, Toluol, Xylol, Ethylbenzol, Tetralin, Dekalin, Dimethylnaphthalin, Testbenzin, Mineralöl und Kerosin; trocknende Pflanzenöle wie dehydriertes Leinöl und Rizi¬ nusöl; tierische' Öle wie Fischöle; halbtrocknende Öle wie Sojaöl sowie kompatible Mischungen dieser Lösungsmittel.Suitable solvents for the printing inks according to the invention are the solvents known to be used for such purposes. Please also refer to "The Printing Manual". Suitable examples are: alcohols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, pentanol, isopentanol, neopentanol, hexanol, 2-ethyl-1, 3-hexanediol and glycerol; Glycols such as 1,2-ethylene glycol, 1,2- and 1,3-propylene glycol and 1,2-, 2,3- and 1,4-butylene glycol; Ether alcohols such as di- and triethylene glycol, ethylene glycol monomethyl and ethyl ether, 3-methoxypropanol and 3-isopropoxypropanol; Ethers such as methyl tert-butyl ether, tetrahydrofuran and dioxane; Ketones such as acetone and methyl ethyl ketone; Keto alcohols such as diacetone alcohol; Alcohol amines such as triethanolamine; Esters such as ethyl, propyl and butyl acetate; aliphatic and aromatic hydrocarbons such as pentane, hexane, heptane, octane, isooctane, petroleum ether, toluene, xylene, ethylbenzene, tetralin, decalin, dimethylnaphthalene, white spirit, mineral oil and kerosene; drying vegetable oils such as dehydrated linseed oil and castor oil; animal 'oils such as fish oils; semi-drying oils such as soybean oil and compatible mixtures of these solvents.
Die erfindungsgemäßen Druckfarben enthalten in der Regel etwa 15 bis 60 Gew.-%, vorzugsweise 20 bis 40 Gew.-% organisches Lösungs¬ mittel.The printing inks according to the invention generally contain about 15 to 60% by weight, preferably 20 to 40% by weight, of organic solvent.
Außerdem können die erfindungsgemäßen Druckfarben weitere für Druckfarben übliche und dem Fachmann geläufige Zusatzstoffe wie Wachse, Trockenstoffe, Geliermittel, Antioxidantien, oberflächen¬ aktive Hilfsmittel, Deodorantien, Entschäumer sowie Farbstoffe und Pigmente (z.B. Titandioxid) zur Einfärbung enthalten.
Von besonderem Interesse sind hierbei sog. Abstandshalter, die der Zerstörung der Mikrokapseln beim Anreiben der Druckfarbe und beim Druckvorgang selbst entgegenwirken und eine hohe Reibecht¬ heit der Drucke ermöglichen.In addition, the printing inks according to the invention can contain other additives customary for printing inks and known to the person skilled in the art, such as waxes, drying agents, gelling agents, antioxidants, surface-active auxiliaries, deodorants, defoamers, and dyes and pigments (for example titanium dioxide) for coloring. Of particular interest here are so-called spacers, which counteract the destruction of the microcapsules when the printing ink is rubbed in and during the printing process itself, and which enable the prints to have high rubbing fastness.
Geeignete Abstandshalter sind bekanntermaßen z.B. Cellulosefasern und kalibrierte Stärke. Es können aber auch andere Substanzen wie die in der DE-A-39 35 111 beschriebenen Melaminvollkugeln für diesen Zweck eingesetzt werden.Suitable spacers are known to be e.g. Cellulose fibers and calibrated starch. However, other substances such as the solid melamine balls described in DE-A-39 35 111 can also be used for this purpose.
Die Abstandshalter werden in der Regel in Mengen von bis zu 15 Gew.-%, vorzugsweise 5 bis 10 Gew.-%, bezogen auf die Druck¬ farbe, eingesetzt.The spacers are generally used in amounts of up to 15% by weight, preferably 5 to 10% by weight, based on the printing ink.
Bei der Herstellung der erfindungsgemäßen Druckfarben geht man zweckmäßigerweise so vor, daß man zunächst das Bindemittel im Lösungsmittel löst und dann die übrigen Bestandteile einrührt.In the preparation of the printing inks according to the invention, the procedure is expediently such that the binder is first dissolved in the solvent and the other constituents are then stirred in.
Die Mikrokapseln können dabei in trockener Form als Mikrokapsel- pulver oder als wäßrige Dispersion eingesetzt werden. Je nach dem für die fertige Druckfarbe gewünschten Wassergehalt ist die eine oder die andere Vorgehensweise vorzuziehen. Nötigenfalls kann überschüssiges Wasser auch im Vakuum verdampft werden.The microcapsules can be used in dry form as microcapsule powder or as an aqueous dispersion. Depending on the water content required for the finished printing ink, one or the other procedure is preferable. If necessary, excess water can also be evaporated in a vacuum.
Die erfindungsgemäßen Druckfarben sind auch bei hohen Mikrokap- selgehalten von in der Regel > 30 Gew.-% niedrigviskos und können daher problemlos verdruckt werden. Weiterhin ist von Vorteil, daß aufgrund der möglichen höheren Mikrokapselgehalte niedrigere Dik- ken der aufzubringenden Schichten von etwa 4 bis 6 μ ausreichen, um Durchschriften der gewünschten Intensität zu erhalten.The printing inks according to the invention are, even with high microcapsule contents of generally> 30% by weight, of low viscosity and can therefore be printed without problems. Another advantage is that, due to the possible higher microcapsule contents, lower thicknesses of the layers to be applied of approximately 4 to 6 μm are sufficient to obtain copies of the desired intensity.
Die erfindungsgemäßen Druckfarben können vorteilhaft nach der Technik des indirekten Buchdrucks (oder Trockenoffsetdrucks) zur Herstellung von zwei- bzw. mehrkomponentigen Reaktionsdurch- schreibepapieren verwendet werden. Dabei ist überraschend, daß die erfindungsgemäßen Druckfarben auch mit hohen Wassergehalten von etwa > 10 Gew.-% unter Erzielung hervorragender Druckergeb¬ nisse eingesetzt werden können.The printing inks according to the invention can advantageously be used according to the technique of indirect letterpress printing (or dry offset printing) for the production of two- or multi-component reaction carbonless papers. It is surprising that the printing inks according to the invention can also be used with high water contents of about> 10% by weight while achieving excellent printing results.
Der Farbauftrag erfolgt dabei vorzugsweise über wenige (d.h. etwa 3 bis 5) Farbwalzen.The ink is preferably applied via a few (i.e. about 3 to 5) ink rollers.
Eine Variante des erfindungsgemäßen Druckverfahrens besteht darin, daß man die Druckfarbe aus dem Feuchtwerk überträgt und nicht aus dem Farbwerk. Auf diese Weise könnten auch Schichten höherer Dicke problemlos aufgebracht werden.
Als farbentwickelnde Substanzen können für die Nehmerschichten der Reaktionsdurchschreibepapiere die üblicherweise verwendeten sauer reagierenden Verbindungen wie saure Tone, z.B. Mont- morillonite, Smektite und vor allem Bentonite, und Phenole einge- 5 setzt werden.A variant of the printing process according to the invention is that the printing ink is transferred from the dampening unit and not from the inking unit. In this way, layers of greater thickness could also be applied without problems. The acidic compounds such as acidic clays, for example montmorillonites, smectites and especially bentonites and phenols, which are commonly used, can be used as color-developing substances for the receiver layers of the carbonless papers.
Beispiel 1example 1
Zunächst wurde ein Bindemittelfirnis aus 10First, a binder varnish from 10
17,8 Gew.-% naphthenischem Öl 5,7 Gew.-% Kohlenwasserstoffharz (Sheboffset 68140; DSM Resins, NL) 30,8 Gew.-% Glycerin 15 1,8 Gew.-% Terpenöl17.8% by weight of naphthenic oil 5.7% by weight of hydrocarbon resin (Sheboffset 68140; DSM Resins, NL) 30.8% by weight of glycerin 15 1.8% by weight of terpene oil
22,2 Gew.-% Natriumresinat22.2% by weight sodium resinate
1,0 Gew.-% Alkydharz (Sovernol® KA 3089; Henkel) 20,7 Gew.-% einer Mischung aus: 50 Gew.-% Mineralöl 20 28 Gew.-% Aluminiumsilikat (Bentonit)1.0% by weight of alkyd resin (Sovernol® KA 3089; Henkel) 20.7% by weight of a mixture of: 50% by weight of mineral oil 20 28% by weight of aluminum silicate (bentonite)
22 Gew.-% 2-Ethyl-l,3-hexandiol22% by weight of 2-ethyl-1,3-hexanediol
durch Mischen und Lösen der Komponenten hergestellt.made by mixing and dissolving the components.
25 Dieser Firnis wurde zur Herstellung einer Druckfarbe aus25 This varnish was used to make an ink
47 Gew.-% Firnis 15 Gew.-% Wasser 8 Gew.-% Titandioxid 30 30 Gew.-% Mikrokapselpulver (Mikrokapseln auf der Basis von Me- lamin/Formaldehyd gemäß der EP-A-26 914, schwarze Farbe entwickelnden Farbbildner enthaltend)47% by weight of varnish 15% by weight of water 8% by weight of titanium dioxide 30 30% by weight of microcapsule powder (microcapsules based on melamine / formaldehyde according to EP-A-26 914, containing black color-developing color formers )
verwendet. 35used. 35
Die erhaltene Druckfarbe wurde im indirekten Buchdruck (Trocken¬ offsetdruck) in einer Menge von 5 g/m2 auf Rohpapier (50 g/m2) aufgebracht.The printing ink obtained was applied in indirect letterpress printing (dry offset printing) in an amount of 5 g / m 2 to base paper (50 g / m 2 ).
40 Beim Beschreiben in Kontakt mit einer Clay-Nehmerschicht wurden sowohl bei vollflächig als auch bei teilflächig bedrucktem Papier gut lesbare Durchschriften erhalten.40 When writing in contact with a clay receiver layer, easily legible copies were obtained with both full and partially printed paper.
Beispiel 2Example 2
4545
Eine Druckfarbe aus
18,6 Gew.-% Natriumresinat 18,6 Gew.-% GlycerinA printing ink 18.6% by weight sodium resinate 18.6% by weight glycerin
62,8 Gew.-% einer 50 gew.-%igen, wäßrigen Dispersion der Mikro¬ kapseln aus Beispiel 162.8% by weight of a 50% by weight aqueous dispersion of the microcapsules from Example 1
wurde im indirekten Buchdruck in einer Menge von 5 g/m2 auf die Geberseite eines Formularsatzes aufgebracht.was applied in indirect book printing in an amount of 5 g / m 2 to the donor side of a set of forms.
Beim Beschreiben des eine Clay-Nehmerschicht aufweisenden Formu- larsatzes wurden ebenfalls gut lesbare Druckschriften erhalten.When describing the set of forms having a clay receiver layer, legible documents were also obtained.
Beispiel 3Example 3
Eine Druckfarbe ausA printing ink
46,5 Gew.-" Glycerin46.5% by weight " glycerin
8.0 Gew.-% Triethanolamin 5, 9 Gew.-% Wasser8.0% by weight of triethanolamine 5.9% by weight of water
1.1 Gew.-% Isopropanol 4,5 Gew.-% Teflonwachs1.1% by weight of isopropanol 4.5% by weight of Teflon wax
29,5 Gew.-% des Mikrokapselpulvers aus Beispiel 1 4,5 Gew.-% Acrylharzemulsion29.5% by weight of the microcapsule powder from Example 1 4.5% by weight of acrylic resin emulsion
wurde im Trockenoffsetdruck über das Feuchtwerk in einer Menge von 6 g/m2 auf die Geberseite eines Formularsatzes aufgebracht.was applied in dry offset printing via the dampening unit in an amount of 6 g / m 2 to the donor side of a set of forms.
Beim Beschreiben des eine Clay-Nehmerschicht aufweisenden Formu¬ larsatzes wurden ebenfalls gut lesbare Durchschriften erhalten.
When describing the set of molds having a clay receiver layer, easily legible copies were also obtained.
Claims
1. Druckfarben für den indirekten Buchdruck, die Farbbildner enthaltende Mikrokapseln, Wasser, Bindemittel, organisches1. Printing inks for indirect letterpress printing, the microcapsules containing color formers, water, binders, organic
Lösungsmittel und gegebenenfalls weitere für Buchdruckfarben übliche Zusatzstoffe enthalten.Contain solvents and optionally other additives common for letterpress inks.
2. Druckfarben nach Anspruch 1, die 1 bis 30 Gew.-% Wasser ent- halten.2. Printing inks according to claim 1, which contain 1 to 30 wt .-% water.
3. Druckfarben nach Anspruch 1 oder 2, die 5 bis 20 Gew.-% Was¬ ser enthalten.3. Printing inks according to claim 1 or 2, which contain 5 to 20 wt .-% water.
4. Druckfarben nach den Ansprüchen 1 bis 3, die 20 bis 45 Gew.-% Mikrokapseln enthalten.4. Printing inks according to claims 1 to 3, which contain 20 to 45 wt .-% microcapsules.
5. Druckfarben nach den Ansprüchen 1 bis 4, die 30 bis 40 Gew.-% Mikrokapseln enthalten.5. Printing inks according to claims 1 to 4, which contain 30 to 40 wt .-% microcapsules.
6. Verfahren zur Herstellung von druckempfindlichen, kohlefreien ÜbertragungsSystemen nach der Technik des indirekten Buch¬ drucks, dadurch gekennzeichnet, daß man hierfür die Druckfar¬ ben gemäß den Ansprüchen 1 bis 5 verwendet.6. A process for the production of pressure-sensitive, carbon-free transmission systems according to the indirect book printing technique, characterized in that the printing inks according to claims 1 to 5 are used for this.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß man die Druckfarben über das Feuchtwerk auf die Druckwalzen auf¬ bringt.7. The method according to claim 6, characterized in that one brings the printing inks over the dampening unit onto the printing rollers.
8. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß man die Druckfarben über wenige Farbwalzen aufträgt. 8. The method according to claim 6, characterized in that the printing inks are applied over a few ink rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU71249/94A AU7124994A (en) | 1993-07-15 | 1994-06-28 | Microcapsule-containing printing inks for indirect letterpress printing |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4323745.2 | 1993-07-15 | ||
| DE19934323745 DE4323745A1 (en) | 1993-07-15 | 1993-07-15 | Printing inks containing microcapsules for indirect letterpress printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995002643A1 true WO1995002643A1 (en) | 1995-01-26 |
Family
ID=6492902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1994/002102 WO1995002643A1 (en) | 1993-07-15 | 1994-06-28 | Microcapsule-containing printing inks for indirect letterpress printing |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU7124994A (en) |
| DE (1) | DE4323745A1 (en) |
| WO (1) | WO1995002643A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6042641A (en) * | 1998-10-16 | 2000-03-28 | The Mead Corporation | CB printing ink |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0036101A1 (en) * | 1980-03-05 | 1981-09-23 | BASF Aktiengesellschaft | Low viscous microcapsules and binders containing aqueous inks for coating and printing, paper sheet coated or printed with the same and use thereof in pressure-sensitive copying systems |
| EP0037477A2 (en) * | 1980-03-26 | 1981-10-14 | Bayer Ag | Copying system and method for its manufacture, and offset or printing dyes useful in this system |
| US4889877A (en) * | 1988-01-07 | 1989-12-26 | The Standard Register Company | High solids CB printing ink |
-
1993
- 1993-07-15 DE DE19934323745 patent/DE4323745A1/en not_active Withdrawn
-
1994
- 1994-06-28 WO PCT/EP1994/002102 patent/WO1995002643A1/en active Application Filing
- 1994-06-28 AU AU71249/94A patent/AU7124994A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0036101A1 (en) * | 1980-03-05 | 1981-09-23 | BASF Aktiengesellschaft | Low viscous microcapsules and binders containing aqueous inks for coating and printing, paper sheet coated or printed with the same and use thereof in pressure-sensitive copying systems |
| EP0037477A2 (en) * | 1980-03-26 | 1981-10-14 | Bayer Ag | Copying system and method for its manufacture, and offset or printing dyes useful in this system |
| US4889877A (en) * | 1988-01-07 | 1989-12-26 | The Standard Register Company | High solids CB printing ink |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6042641A (en) * | 1998-10-16 | 2000-03-28 | The Mead Corporation | CB printing ink |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4323745A1 (en) | 1995-01-19 |
| AU7124994A (en) | 1995-02-13 |
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