DE1771424A1 - Color transfer material and process for its manufacture - Google Patents

Description

Reaker-Belipa G.m.b _ "-." _ _ Dorf-Krauthaueen about

\ I l \ ~ k "lh Düren, 9.4a 1968

(Poets 5165 Niederau

Nideggener Str. 38)

P.O. Box 516 Dürön 445 sf / hn

Color transmission material and method for its division

The invention relates to a method for producing color transfer material, in particular disposable carbon paper, by coating an at least superficially absorbent carrier with it a mixture that contains waxes, polymer binders and pigments in an organic liquid

Carbon papers, both.Multi-carbon paper and a » Carbon paper, carbonless paper for handwriting and machine typefaces and similar color transfer materials usually have an ink-releasing layer of wax, oil and paint «

Such materials with oily paint ζ · Β · made of hot carbon are known to have essential parts. The paint layer smears in the wet condition and becomes dry and dry over time hard, the oil and other low molecular weight substances migrate into the Backing paper * b, whereby the color layer is very intense subsides, and dl · copies are not wisohlest.

With the so-called disposable carbon paper, i.e. the cheapest scribble paper for one-time use, there are further disadvantages

share. Disposable carbon paper is durohweg by application Clay produced by hot carbon, d. H. ron sohmeltigem Waohs- / Oil compositions containing RuO or similar pigments «, The. The single-use carbon papers on the market are provided with an excessively high amount of ink, which is far above the "type" anechlag required amount. Last but not least, the application of the paint layer must be very high, and

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a noticeable reduction in blackness through a change in the secondary particles in their light absorption capacity Hot carbon paints. All these deficiencies leave a significant quality improvement in particular of the disposable carbon papers over the up to now hardly any more.

These Naohteile are typical of the hot carbon process, because this requires enamel colors that are on the coating or printing ^ machines at the usual high stray speeds still the

P

Leave out the creation of a continuous layer.

The rheological requirements for hot carbon paints limit the amount of figment that can be processed. _S can be Normalerweiee can dor color even with beaded or weakly colored soot little more than 20 i "enforce) at pronounced Farbrußen lowered custody the amount Nooh significant, such Rube fall ever processed are generated from farbatarken carbon blacks with high Ölblndung can praktiaoh not flowable Heißoarbonfarben because they are no longer processable due to the high degree of thickening « However, they would be particularly advantageous because of their great depth of color.

Eb has therefore not lacked in attempts to develop oil-free transfer layers for copy materials. Are known special into "eolohe materials comprising a dye-binder layer may be Waoheüber-Bchicht tr ag en, 'wherein Nooh arranged on this color layer is a _(between the support and the ink layer an intermediate layer on the support ₀ One of the disadvantages of this well-known oil-free materials are due to their more-

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layered structure, namely their complex and expensive Production in several working days. The individual layers do not just have to go under in a correspondingly large number of work aisles special conditions must be applied and dried, but the individual preparations must also be coordinated with one another be that she baw. the layers made from it are not calibrated affect each other.

Also the combination of mutually contradicting properties, namely good adhesion of the color layer to the carbonless copy material on the one hand, on the one hand, on the other hand, on the other hand, a high level of urif purity is achieved and good adhesion of the color particles transferred to the copy eur achievement of good smear resistance of the copies, on the other hand, material and procedural difficulties are repeatedly encountered.

Single layer rubbing materials are also already available has been described. Their layer is usually a continuous, practically homogeneous, solid coating of a waxy one Material. Since large amounts of this as The material used for binding is transferred, and the material itself is soft and sticky, but the copies are consistently not wlsohfeet, and the copy material is from the smeared for the same reason. It doesn’t matter Roll whether the carbonaaase with a liquid color from the melt with a suitable solid binding agent all solution in one, liquid organic solvent or in the form of an emulsion bswo dispersion in suitable liquids on the carrier

is brought. bath

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A color transmission material that has recently become known the single-layer type? has a coating »that in one non-sticky waohe usually contains carbon blacks ale pigment, where Jedooh the Waohe is mixed with talc and together with this by low molecular weight Athyloelluloee as a binder to be held by the carrier. This known material is made by adding the pigment and the talc dispersed in a solution of Waohe and Athyloelluloee in toluene, the dispersion spreads onto the carrier and the solvent evaporates, the wax crystallizing out. The talc is supposed to The formation of a layer of fine discrete parts and, at the same time, the coefficient of friction of the sole surface reduce, so that they are more resistant to scratching or Will rub off, but on the other hand not the portability of the Waohs / obstruct particles of dye under the Sohreibdruok

As practical experiments have shown, “these requirements become however, only inadequately met. The color is neither clean to the touch, nor are the copies produced whispered and intense. Of the The main disadvantage of this known material, however, lies in a procedural difficulty that Soot, Athyloelluloee and toluene have disproportionately low proportions of color bodies, whereby colorless copies are created After stirring it up in a short tent, so that "it forms a sole sheet and a clear liquid layer over it that is cloudy and white. A fine liquid layer, at least for a certain period of time stable dispersion does not allow sloh to be prepared. Ss is therefore also not possible to streioh the described material on UbIlohen maaohinen and to produce in exactly reproducible quality, there

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even with careful! Recirculation of the coating mass over and over again Inhomogeneities occur.

This invention aims to remedy these problems and solves the ^ task of developing a process that in a single Streiohvorgang to a carbonless material, especially for Single use, with a thin application of paint, which is resistant to aging, diffusion-proof, dry and non-smearing is, intensive, sharp, smudge-proof and erasable copies ^ delivers, and which allows it in place of fillers entirely outstandingly higher amounts of color bodies and also to incorporate them in a deeply colored condition »

This object is achieved according to the invention in that aan gel-forming waxes, namely at least one wax with a penetration (according to ASTM D 1371-57 at 77 ° F and 100 g) of 1-10 _tons, preferably 2-8, and at least one Wax with a penetration of 10-60, preferably 20-25, or a mixture of both with an average penetration of about 10-20, and up to about 20 percent by weight, preferably up to about 10 percent by weight of a high molecular weight binder, in one of the waxes solvating non- to black-polar liquid dissolves to a concentrated, clear solution as possible, at room temperature approx. 40 - approx. 70 percent by weight, preferably 50 - 60 percent by weight, of the amount of wax precipitates as gel particles, the dispersion / solution optionally with setting or ₀ Adherence to this quantitative ratio between the excreted and dissolved Waohs shares

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and 'with retention or additional formation of the gel particles diluted with further liquid or wax solution, then the Pigments dispersed vigorously, the mass obtained in itself in a known manner on the paper and distributes the liquid below the softening temperature of the solid wax particles.

The preferred procedure is to use a liquid with ^ positive, preferably large, solubility coefficient for the Waxes used and the dissolution or separation caused by heating or preferably rapid cooling of the liquid. The preferred liquids are those that are easy to calibrate Can be removed from the layer, special aliphatic and aromatic hydrocarbons or chlorinated hydrocarbons, preferably light gasoline, 1,1,1-trichloroethane, benzene, or toluene Mixtures thereof »

For the classification of wax systems, especially gel-forming waxes, see Fischer-Presting, "Laboratoriumsbuch für die Investigation of technical "axle, resin and oil mixtures" 3rd edition, VEB Wilhelm Knapp Verlag, Halle (Baale) 1958 page 463 referenced.

The two gel-forming waxes defined above are referred to below as "harder ¹¹ " and "softer" wax for the sake of simplicity.

All harder waxes come into consideration, in particular, natural or synthetic waxes, oxidized montan waxes, their esters and

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Amides, solid hydrocarbons, mineral waxes or their

I-

Mixtures, especially branched-chain Pennsylvanian petroleum waxes e.

Examples of suitable amorphous waxes are listed below * led commercial products, which are useful in practical ourohführung of the invention have proven particularly well »

Double-chain penneylvaniache petroleum waxes

in particular the uncut products with a very fine structure and large plastics, which are obtained exclusively from crude oil residues by means of selec- M tire! separation with a narrow melting point range, adhesion and cohesion, especially the qualities with a melting point according to ASTM B 127-49 ran 84 - 86 ° 0 bew ₀ 88 - 90 ° C and a penetration number according to ASTM D - 1321 - 57 T # at 77 ° Γ, 100 g of max. 8 bew. 7 and whiter to light color ₀

S wax

Acid waohs on laontanwachibasy, dropping point 78 - 83 ° C, solidification M

point 73 - 77 ° C, acid chamber 135 - 155, soaping chamber 155 - 175 ,

Density at 20 ° C, 1.00 - 1.02 {all who

methods determined), color light yellowish.

Ir wax

Density at 20 ° C, 1.00 - 1.02 {all values based on the DCS input

Acid wax based on montan wax, dropping point 80 - 85 ° C, Freezing point 75 - 80 ° C, acid ahl 120 - 140, saponification ale 140 - 160, diet at 20 ° C, 1.00 - 1.02 (all values determined according to the D&P Einheltsmethods), color yellowish

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Candelilla wax can also be used «

The taikrowaohee are used as softer waxes. in the narrower sense, including the ozokerites and soft ceresins and similar petrolatum waxes, which, in contrast to the paraffins, have a microcrystalline structure and a melting point of about 60-70 ° C, in particular about 65 ° C. Eeter waxes are also suitable with an acid number less than 60 »preferably between 10 and 30», a saponification between 80 and 150 and a melting point below 85 ° G ₀ , the Japanese guard and the finely crystalline bee guard have also proven themselves.

The waxes can also be used in mixtures of two or more representatives of the same group or of both groups. Dit products mentioned are already mostly self mixtures of different, though related compounds} so are the montan waxes preferably petroleum excretions duroh more or won less intensive refining · Ee therefore are usually Raffinatione- ^ll Bohnitte · ¹ so that it is possible “Instead of using a harder wax and a softer wax, use a medium wax of the appropriate fraction width”, provided that it corresponds to a mixture of these two waxes in the proportions given above and provides the same properties.

The binders are used for cementing the guard and paint lines among each other and on the substrate. The type and amount of the layer-forming substances can be determined by a person skilled in the art in the context of the explanations below.

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A binder is preferably used which is at least predominantly soluble in the liquid in the range between the solution and drying temperature ₀

Polyvinyl ethers of straight-chain or branched aliphatic alcohols with 1-20 carbon atoms are particularly suitable, in particular Fatty alcohols, preferably with styrene and its derivatives

(eg a-Methyl-styrene, Yinyltoluol u _o a.) mode fixed alkyd resins, A'thoxylinharze / or ^ with natural resin acids modifixierte Phtnol- resins used.

This group of binders is preferred because of their representatives Sohon in concentrations of a few percent by weight significantly reduce the viscosity of the Waohadipsereion prepared according to the invention and in particular the coating color, especially if this was obtained by cooling the waOhVsolution «You will therefore rewarded here as a viscosity regulator. Your effect is especially surprising because, as already said above, carbon paper inks because of the incorporated BuQ or pigment ' particles cause particular difficulties with regard to their viscosity and flow behavior

To explain this phenomenon one can - without the invention on to establish any theories «since ·! assume the following ι

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It is well known that microcrystalline Waohse show the ability to strongly hold back solvents under swellings (retention effect). This phenomenon is the greater, the smaller the The proportion of straight-chain paraffins is, ia aioh the above

called waxes mostly characterized by a particularly high degree of branching and often also a large proportion of ring-shaped paraffins- draw, this retention effect is particularly pronounced in them} from a hot solution, the sparingly soluble parts precipitate first when it cools down and form relatively large swelling bodies, As the solution cools further, they also gradually separate the slightly less sparingly soluble parts also take the form of swelling bodies. Ήθ in addition to excreted and solvated waxes in that Contains solvent dissolved water

The retention effect of the waxes used according to the invention has however, the disadvantage that you have to use a relatively large amount of solvent to produce a spreadable mass; especially with The addition of finely divided, "active" carbon blacks as pigments is a problem for such a dispersion if not enough solvent is added so high that the viscosity is neither sufficiently mixed nor can be passed satisfactorily. However, the use of large amounts of solution is from an economic standpoint ° unsatisfactory, since the losses are high and / or expensive JJJ solvent recovery systems are required.

"The aforementioned viscosity regulator can help here. More possible ^m wise, the influence they exert on the viscosity, in practice, it is preferable to lower the viscosity

ORIGINAL

Colloid peptization can be explained, however electrical also come Charge reversal processes with the pigments at the phase boundaries are possible. Bb should not be necessary for the layer-forming Substance is truly soluble in the solvent if it only has a greater solubility than the waxes. However show substances that only dissolve in the solvent in a cloudy manner, a weaker effect in the direction of a viscosity reduction, so that larger amounts of either this substance or the solvent must be used so that the same viscosity * reduction in a readily soluble substance is achieved. In particular of the latter, 1 - 2 # are usually sufficient, but can the determination of the additional amount taking into account the desired Viscosity reduction and the binding effect, the the substance in the dispersion / solution on the one hand and the finished one On the other hand, can be determined by the Faohmann through simple experiments

The following commercial products have proven particularly effective as viscosity regulators: jm

Medium viscosity polyvinyl methyl ether with a K-word of 40.

Vinyl toluene modified alkyd resin, 60 % in white spirit. Characteristic data phthalic anhydride 19 # Linoleic acid content »33 Ί * Viscosity at 20 ° C: 40 fiig in gasoline

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Naturally modified phenolic resin, Sohmelabereioh 95 - 105 ° » soluble inter alia in aromatics.

Polymers based on vinyl acetate, in an organic solution

Thermoplastic polyrinyl isobutyl ethers

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Mixtures of these viscosity regulators can also be used and / and with other sohioht-forming substances that use This effect does not show in the solvent used, * .B. \ Ethyl cellulose in 1,1,1-triohlorethane.

Even if the binding agent on the one hand and the liquid for dispersing baw <> dissolving the waxes and the binding agent must be coordinated with one another in order to achieve optimal results in the gosehilddrten sense mentioned not offer aohwaoh polar solvents ₍ consistently achieve good to very good results "

The viscosity-reducing effect of the substances mentioned makes it possible to include such EuQs as color pigments in the coating slip incorporate, which show a pronounced thixotropy due to their large surface.

By adapting the quantity and quantity of the components of the shoe, especially the waxes and the substances that form the skin, let it the bond and the adhesive strength of the color layer on the carrier are coordinated and the plastic separation of the color layer under the Regulating writing pressure "" It is assumed that the pigment particles are surrounded by the fine wax particles that have reached the dry state via gel-like swelling bodies, but not or are not completely filled out by these, nor by the Skin-forming binders, which due to their high molecular weight and linear structure cannot penetrate the pigment parts, but cement the gel and pigment parts to one another and affect the hardness of the work.

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Any carrier is primarily paper, in particular a smooth raw material or one-sided smooth raw material such as 20 g carbon raw paper. However, nonwovens made from synthetic fibers and other materials can also be used, which at least superficially have a certain absorbency without, however, to to be porous. If necessary, the carrier material can also be used a back cover and / or intermediate layer or otherwise- * how to be groomed.

To achieve a high color depth, it is particularly advantageous to that the less soluble waxes are separated out as gel particles, which are at least partially larger than the pigment particles bsw their abutment particles or agglomerates.

In terms of manufacturing technology, the process feature has proven to be very good It has proven to be a precautionary measure to remove the layer before drying immediately after the dispersion has been blown up, with air from about 5 - 25 ° C applied.

Whenever "pigments" are spoken of, this is the expression generally do understand! for example, instead of RuB, a Dye absorbed onto a support can be used

Even old "guard" are not Waohse in the narrower (oheal) sense meant, but - as the substances listed show. Substances of suitable quality.

The invention is achieved when, for example, soot in the case of soot s the sole from a high not attainable with hot water

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If there is a proportion of carbon black, carbon blacks also serve to prevent a significantly higher degree of blackening and, despite the high proportion of carbon black, the color layers have a previously unknown odor resistance. Furthermore, the layers of paint are dry and tack-free; They are therefore particularly suitable for sets of forms and for processing on additional carriers. The erfinriunggge i: .lx2 layers produced do not suffer the well-known change of the hot-carboxylic colors on prolonged storage, in particular, they do not harden after. It is particularly important that the color layers produced according to the invention have, with improved effectiveness, only 1/4 - 1/5 of the weight of conventional colored carbon paper.

Without wishing to restrict the invention to a specific theory, the following should be made to explain the excellent properties of the materials produced by the process of the invention, in particular the greater depth of color of the color layer: Despite extensive experiments with the most intense blacks, it has not been possible to date with hot carbon paints To increase the degree of blackening of the m copies beyond the known level. The carbon blacks always experience a reduction in the degree of blackening in hot carbon paints. The cause lies in the liquid oil or melted * wax, which fills the soot particles in the liquid state and thereby makes the hot carbon paint flowable. *

In contrast to hot carbon paints, the paint layers produced according to the invention do not contain any oily constituents. The wax particles are approximately the size of the color pigment platelets, in the case of carbon black

that of the agglomerates of the secondary particles, the former being im

209821/0126 10 - 20 μ and the latter mean 20 «50 μ in size.

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Bel the layer formation, the drying is directed so that the

Gel particles remain in solid form, so that the carbon black or pigment particles cannot penetrate. The weight of the soluble In the case of carbon blacks, the wax and binding agents should not exceed their weight To fill in shoe formation,

Whether the interior of the pigment particles is filled with oil or wax is or not »but now results in a fundamental difference in the optical behavior · This results from the following consideration, using a single soot secondary particle as an example «U based on rope

A hot carbon particle, a soot part, made with wax and oil is filled, can be compared to a droplet, in which the chain of soot is embedded in a ball-shaped manner A ray of light which falls from the outside into such a droplet becomes a * or P repeated total reflection in the interior of the droplet emerge from it, the probability being high that it will not continue into the layer, aonderifin is deflected back outwards » During this process, there is only a slight increase in growth on average the jet, because the volume of the oil droplet is much larger, than that of the soot chain enclosed in it and the light absorption is therefore relatively low lato The medium Ul / which is denser than air Waohs increases the refraction and decreases the absorption of light,

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Basically unfilled soot parts produced according to the invention on the other hand, air contains no refraction upon incidence of light and there is no total reflection. So the loan will be if it does not work is absorbed on the carbon chain, practically straightforward Particles pass through and disappear in the course of the layer, there It finally came to a soot part after breaking the enveloping one Wax is absorbed. The blackening of the layer is therefore significantly higher. The same applies to the copies produced.

This high color thickness enables the coloration of the parbso layer to reduce it to an unprecedented degree and thereby increase coverage and blackening «Disposable carbon paper, that naoh dem Method according to the invention was produced, comes with a coloring layer of 2-3 g / m, while a hot carbon single-use carbon

paper jobs of 8-10 g / m to achieve reasonably sufficient Copies require, apart from other disadvantages, this advantage counteracts the method according to the invention conventional views economically feasible and even delivers products that are cheaper than the familiar disposable carbon papers are. That the Waohteileohen dwe manufactured according to the invention Materials have not entered the pigments, can be recognized by the fact that the transferability is immediately canceled » the layer is heated until it melts.

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The invention is explained in more detail below with reference to exemplary embodiments. Ropes are used in these examples as parts by weight, unless otherwise stated "

The general procedure is as follows: The waxes are made as possible A little hot solvent dissolved to give a clear solution. This solution is strongly agitated by means of an emulsifying or diapering unit cooled down. Eb, if necessary, a very oily dispersible ion is formed, the particles of which solidify on further cooling, with the whole solution becomes opaque and pasty. Now, at the latest, is the preferred viscosity agent dissolve in the dispersion, making it thin to the desired extent. If necessary, the dispersion is under Continued stirring with further proportions, the gel formation non-interfering solvents at 20-25 ° C, so that a Flowable opaque liquid with possibly thixotropic behavior results. This dispersion contains gel parts in solid form, duroh Solvents and genuinely dissolved water fractions are solvated, as well as dissolved waxes and binders that remain soluble even at room temperature o In this mixture of dispersion and solution, the Color pigment under dispersing »granted and mixed up | the The preparation is now ready to be coated. It can be easily processed.

After the paper carrier has been coated, it now occurs, as assumed a kind of filtration, dlt «around zone structure the finished material leads to the surface of deodorant paper preferably solvent or wax solution penetrate. On the fiber

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is, especially if the ale layer is blown immediately with cold air, the dissolved wax is finely separated. On the one hand, the porosity of the carrier surface is reduced by the Waohteilchen and, on the other hand, direct contact between the pigment and the termies _o on the eo is preferably formed. The zone consisting of soft water components on or in the surface of the paper is deposited by the pigment particles encased in gel particles, and these are bound to themselves and to the carrier by means of the long-chain binding agent, which slowly dissolves when the solvent evaporates separates, but due to its high molecular weight is also prevented from penetrating the paper. As microscopic examinations show, when the ink layer is written off, the pigment / wax particles apparently become detached in the above-mentioned transition zone, since the pastes at the "written off" surface areas of the paper carrier are still largely coated with wax, which, however, does not contain any pigment.

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example 1

In 50 parts of gasoline with a boiling range of 100-125 ° there are 7 parts of the branched-chain pennBylvian petroleum wax described above, 6 parts of micro-wax 60/65 with a softening range of 60-65 ° and 2.0 parts of polyvinyl ether of stearyl alcohol duroh heating to 80-100 ⁰ C a clear solution. The clear solution is cooled down to a temperature of 25 ° or below with vigorous stirring. An almost paste-like, white-opaque mass is formed which, in addition to dissolved wax, contains wax particles boiled out of the solution . The mixture is treated with the aid of an effective dispersing unit. In the now flowable, finely divided opaque dispersion, 7 parts of a subsequently compacted split or flame black, namely a Parbrußeo with an average particle size of 500-720 Å and a BET surface of 32 m / g, and 1 part of a finely dispersed, in the form of secondary parts, are added present silica stirred in and then dispersed below 25 ° C. This preparation is applied to the surface of a 20 g cellulose paper using a known brushing method in such a large amount that a layer of approx. 2-3 g / m dry weight is created Blown in a stream of air and then dried in a stream of air at room temperature. The material is then exposed to a temperature of up to approx. 40 - 50 ° C for a short time to remove the last residue of the solvent. That

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Product can be called inraal carbon paper. It lies completely flat, has no grip and, despite the small amount of paint applied, delivers a deep black color that is completely detached from the wearer Copy that is smudge-proof and let dry and results in copies with sharp contours.

Example 2

7 parts by S wax, and 6 parts of Japan wax are dissolved hot in 4-5 parts gasoline 100/125 and under the action of a Diepergier- _- sets quickly cooled to 20 °. The result is an opaque paste, the cold with an additional 30 parts gasoline is diluted 100/125 under Diapergieren ₀ To this mixture contains dispersed in a "" wax solution, the gel particles, 4 parts of the alkyd vinyltoluolmodifizierten above and further 10 parts gasoline ■ 100 / 125 is added and the whole is mixed well.

7 parts of parbon black are incorporated into the dispersion obtained.

The now finished dispersion is in the well-known catfish so on a " Cellulose paper is coated on so that in the event of blackout the order is 2-3 g / m amounts to. Immediately after spreading the preparation, as in Example 1 described dried. The results are comparable to those of Example 1.

Example 3

Proceed as in Example 2, but use instead of S-wax an equal amount of L-facho instead of Japanese wax beeswax

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and instead of 7 parts of carbon black, 35 parts of inactive carbon black, ie a thermal cracking black with an average particle size of 3,000-5,000 Å and a BBT surface area of 6-8 m / g.

Example 4

The procedure is as in Example 1, but that of Uikrowachoes is used 60/65 Welchcereein and as a viscosity regulator 4.0 parts Polyvinyl methyl ether K 40 (20% in toluene).

Example 5

The procedure is as in Example 1, but used as the harder one Wax candelilla wax and alο pigment 8 parts copper phthalocyanine

> ei3plel 6

The procedure is as in Example 1, except that all solutions and / or solutions are used. Diluent 1,1,1-trichloroethane.

Example 7

The procedure v / jLe in Example 1 is repeated, but instead of Rui3 7 parts of ultramarine blue.

Example 8

The procedure is as in Example 1, but using 5 parts of one high density carbon black. The dispersion is diluted in this Trap with 70 instead of 35 parts of gasoline »

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Example 9

The procedure is as in Example 1, but using parts of the 50 parts of gasoline, which are used to dissolve »50 parts of toluene and instead of the 35 parts of gasoline, which are used to dilute the dispersion are used, 50 parts of toluene.

Example 10

This bit game is intended to "explain how to get through simple experiments suitable plasticities for the production of a material from- ^ can choose whose color layer for one-time use to the Entirely transferred to the places exposed to writing pressure

Approach 10 A contains essentially all 50 # dissolved fractions. the The layer is sticky and is peeled off from the carrier On the other hand, batch 10 G contains too few white waxes. The üiurchaohrift There is not enough contrast and the transmission is blurred and not type-appropriate. The shift also has the watch parts, ready to show a certain brittleness.

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Approach 10 B gives optimal results _c

harderβ
wax

softer
guard

regulator

5 pieces (26.7 *) 7 pieces (46.7 *) 9 pieces (60.0 *)

8 parts (60.0 #) 6 parts (40.0 *) 4 parts (26.7 *)

2 parts (13.3 *)

writes very badly, little color is transferred, faint color copies

2 parts (13.3 *)

writes eehr
well, shift
is elastic
Copies bind
type-appropriate

2 parts (13.3 *)

writes usable but blurred »the layer in brittle Copies not appropriate to type.

From dieeer juxtaposition of Annätzen can be seen that the hardness or elasticity of the color layer can be set as desired so that calibration satisfactory copies Lansen generate ₀

Example 11

The procedure is as in Example 1, but used as the softer one Wax 6 parts beeswax and as a viscosity regulator 2 parts poly

viny Ibu tyl'ither.

In all of the above examples, not only materials are obtained which meet the requirements set out above, sondenihat Even in spite of small amounts of solvent, preparations are easy to spread to disposal.

Example 12

The procedure is as in Example 1, but instead of the Polyvinyl ether of stearyl alcohol 1.5 parts of ethyl cellulose and

instead of 50 parts Benein uses 100 parts 1,1,1-Triohlor-

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ethane, and instead of 35 parts gasoline »by diluting 200 parts 1, -1,1-trichloroethane. A decrease in viscosity is not observed in the case where the quantity of solvent has to be greatly increased in order to introduce the carbon black and to make the otherwise practically fine mass diapergive and spreadable. The following table shows the soluble proportions and penetration for a number of waxes or WaahsraieehuJigen. These values apply at 20 ° C. For a dispersion in gasoline 100/125, which was produced by cooling a hoisssn solution with 15 weight percent V / axis. The penetrations are determined aolaher for lösliohen or "insolubles dispersion in feston, looungsirdttelfreien state after each 4" workups _t

the
ie gel was excreted by cooling, dissolved again, and caused to be excreted by cooling and dried. j) ieo was repeated 4 times.

Name of soluble part '· $> Pfenetntion Penstration

LöBl, share unlöel «share

Ponneyl. Guard 23.7 21 8 * |

S-Waohs 5.4 10 2

L-Guard 18.1 10 1

feinfckrint. 17.6 12 3 Ifikrowax

Ceresin 63.5 30 7

Micro-WakeB 77.3 51 8 · 60/65

OEOkerit * 79.4 38 4

Waohemieohung 53.8 24 7 from example 1

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Finally, the experiments through which the loosened wax parts are in a cold wax-solvent disporeion let determine »

As an example for carrying out the experiments to determine the dissolved vVachaantci'le in a cold wax solution dispenser serve the following recipe:

Whoa Parts by weight harder wax ι Pennsylv. firddlwachs H softer wax Micro wooha 12th Viekoeltätsreg-
ler ·. Stearyl alcohol Solvent: Petrol 100/125 170

200

Description of the experiments;

Hg harder Waoho, 12g softer wax and 4 g viscosity regulator v / earth dissolved in 100 g solvent in a 500 ml three-necked flask with stirring on the reflux. This hot solution is then cooled as quickly as possible with stirring in cold water to below 25 ° C. It then forms a rather toxic dispersion. "This is then diluted with 70 g of gasoline 100/125 at room temperature, so that a 15% water dispersion in gasoline 100/125 is obtained." The dispersion is centrifuged. After centrifugation for 30 minutes, the liquid phase is determined to be 168 ml with a specific gravity of 0.73 g / ml. After evaporation of the flüesigen.Phaee a residue of 11.8 g remains. The 11.8 g correspond to 39 _t 3 ° f » deo wax mixtures used.

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177U24

The amount of solid residue from the centrifuge is after

ο
Drying at 110-120 C in a drying cabinet 16.9 g. The dry *, solid centrifuge residue is used again to produce a 15 # strength Wache-BenBindie perslon using the test conditions described above, but using fresh gasoline 100/125.

After centrifugation and evaporation of the solvent, a wax residue of 2.9 g results in the liquid phase. These 2.9 6 correspond to 9.6 # of the starting wax mixture

As a solid, dry centrifuge residue, 12.7 g remain can be used again to make a 15 $ long dispersion «.

The experiment described above is repeated a 3 »and 4 * whale, where there is e3, n soluble wax residue of 0.8 g β 2.7 $ and or 0.6 g β 2.0 $ of the total amount of wax mixture results.

By adding the percentages of the dissolved wax in f a cold wax-gasoline dispersion gives the percentage of the wax that is in a cold wax-gasoline dispersion is really resolved.

In the example above, it is found at 53 »6 fi .

1) 39.3 #

Ii) $ 9.6>

III) 2.7 fo

IV) $ 2.0

LjL original

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177H24

Example 13_.

Similar to Examples 1 to 11, a yellow one is produced Transfer color by adding 1,1,1-tri-

i chloroethane 7 parts by weight of the branched chain described above penneyIvanischen Brdölwaohsee, 3 wt ₀ parts by micro guard 60/65, 3 parts of a GeWo in the outer texture strong plastic, vaselineartigen Mlrkowachaes and 2 wt _o parts by polyvinyl ethers clearly solves the stearyl alcohol by heating. This clear solution is quickly cooled to room temperature with vigorous stirring. This results in a paste "This is reacted with 100 parts by weight of 1,1,1-trichloroethane and 30 wt _e parts by toluene diluted» * In the diluted mixture to be 13 parts by weight of a yellow pigment elndlepergiert with the aid of a high potency DlBpergleraggregates.

Then a very warm transfer color similar to that of Example 6 is produced by adding 7 parts by weight of 1,1,1-triohlorethane to 70 parts by weight of 1,1,1-triohlorethane 2 parts by weight of polyvinyl ether of stearyl alcohol clear by heating, the resulting solution rapidly cools to room temperature with vigorous stirring and diluted with 100 parts by weight of 1,1,1-trichloroethane and 30 parts by weight of cold toluene and finally mixed with it 10 wt ₀ parts by farbinten-Bivem lampblack with vigorous Diapergieren versetet.

The yellow transfer color is applied to a cellulose paper suitable for thermosetting purposes with a surface 20 to 35 g / m in advance applied in such a way that the finished,

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177H2A

dried layer an application strength of oa. Has 2 g / m » the material is placed in a warm air atmosphere below 5i> ° G

dries.

On the back of the paper coated in this way the black transfer color applied in the same way as described above »

• *

The one on the front rait a yellow one and on the back for example provided with a black color layer Double-sided copywriting material is particularly suitable for creating sets of forms · Leads are arranged in such a way that for creating a blueprint, a copy or to reinforce the Llohtpausbarkeit the Brstsohrift the The reverse side of the sheet of paper old the characters in yellow Color is deposited. The eohwarie sohioht attached to the back of the transferring sheet is used to generate the next copy.

Sa "Burehe ^ hreibeaat" rial gives both by hand and by hand Maeohinenetjhraufen stunning copies, Si · color layers are like and cause nioht sun vtriohmutia of the hands bein Gebravtoh. In particular, the yellow color continues to have a high absorption capacity for actinic light,

^ namentlioh for such light sources, dle ^ for Liohtpausge-

«Ο rate be used · Show the characters generated k> also has a high smudge resistance on writing paper «,

- · Instead of the yellow toffee used, you can use the ° * Color layer with other colored and uncolored substances high absorption capacity for actinic light with simultaneous

Claims (9)

177H24 patent claims 1. Process for the production of color transfer material, in particular single-use carbon paper, duroh an at least surface-absorbent carrier with a mixture that contains, in addition to waxes, polymeric binders and pigments in an organic liquid, characterized in that there are gel-forming waxes and at least one solvated Waohs with a penetration of 1 * 10, preferably 2-8, and at least one wax with a penetration of 10-60, preferably 20-25, or a mixture of both with an average penetration of about 10-20, and up to about 20 Percentage by weight, preferably up to 10 percent by weight, of a high molecular weight binder, dissolves in a non-polar to slightly polar liquid that solvates the waxes to form a possibly concentrated, clear solution, at room temperature _{or the like} . 70 percent by weight, preferably 50-60 percent by weight, of the moisture content of the puddle as gel parts, the dispersion / solution, if necessary, setting or maintaining this quantitative ratio between the excreted and dissolved parts and with the maintenance or additional formation of the gel parts with further liquid or water solution ver thins, then the pigments are vigorously dispersed, the mass thus obtained is applied to the paper in well-known catfish and expels the liquid below the softening temperature of the precipitated Waohteile " 209821/0126 bathroom original 177H24 2. The method according to claim 1 # characterized in that one a solvent with a positive, preferably _t large temperature coefficient of solubility used for the waxes and the resolution or "deposition duroh heating or, preferably, rapid cooling of the liquid causes. 3. Method according to claim Z ₉ daduroh known that one uses' aliphatic · and aromatic hydrocarbons or chlorinated hydrocarbons, preferably gasoline, 1,1,1-triohlorethane, benzene, toluene, or mixtures thereof. ^ 4. The method naoh one of claims 1-3, characterized in that on the one hand natural or synthetic waxes oxidized montan waxes, their cement and amides, solid hydrocarbons, mineral waxes or their mixtures, preferably branched chain synthetic petroleum waxes and on the other hand, Japan wax, micro wax, preferably micro wax 60/65, beeswax or / and softened mineral used, 5. The method naoh one of claims 1-4, characterized in that that one uses a binder which is in the range between Dissolving and drying temperature at least predominantly in the Liquid is soluble » 6. The method naoh claim 5 »characterized in that as Viscosity regulator polyvinyl ether straight-chain or branched aliphatic alcohols 1-20 carbon atoms, especially fatty alcohols preferably modified with styrene and its derivatives alkyd resins, ethoxylin resins, and / or modified with natural resin acids Phenolic resins used. BATH ORIGINAL 209821/0126. ₃ . Ί77Η24 7. The method according to any one of the preceding claims, characterized in that the pigment weight is at least equal to the weight of the dissolved wake components in the Chooses dispersion / solution. Θ. Method according to one of the preceding claims, thereby characterized in that the less soluble waxes are separated out as gel parts which are at least partially larger feie the pigment flakes or their secondary particles or Agglomerates. 9. The method according to any one of the preceding claims, characterized in that the layer prior to drying, preference * wise immediately after spreading the dispersion with air at about 5 "- 25 ° C. 209821/0126 _BAD original