FI59220B - KOPIERINGSMATERIAL - Google Patents

Description

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Patent- och r * gi * t * r * tyreleen '' Antttktn utlagd och utUkrlftM publicend. U j. 01 (32) (33) (31) Pretty • cueik ·! »- e * fW prior ** 21-09-72 Austria-Österrike (AT) A 8132/72 (71) Kores Holding Zug AG, Baarerstrasse 57» CH -63OO Zug, Switzerland-Schweiz (CH) (72) Manuel Cespon, Vienna, Austria-Austria (AT) (7 ^) Leitzinger Oy (5I *) Reproductive material - Kopieringsmaterial Numerous proposals have been made for replicative systems based on chemical color reaction. In reproduction systems of this type, the two overlapping sheets of the reproduction set are each provided with one layer on their contact surfaces. In use, these contacting layers each contain a color reaction component which, under the pressure of writing, coincides with the corresponding component of the second layer and reacts chemically with it to form a colored trace.

Reproduction systems of this quality have different advantages over systems based on the transfer of dyes already in the layer. The paper-producing layers of a series of copies of this quality are colorless or very light in color and do not get their hands dirty. Reproducibility is somewhat selective, i.e. the imprint is created only when two leaves of the same system overlap. By selecting the reaction components to be included in the combination, different colored traces can be obtained. The color of the imprint thus created can be used for storage aid or other orderly purposes.

2,59220 In reproduction systems of this type made known in practice, the underside of the top sheet in question is provided with a layer containing an organic precursor, such as crystal violet lactone, dissolved in oil, while the copy layer of the writing consists of an adsorbable tonal mineral. the oil is stored in fine droplets in the top leaf layer. Under writing pressure, this oil is squeezed out of the layer and transferred to a copy copy sheet, where the crystal violet lactone it contains reacts with the tonal mineral to form a colored imprint. In an older embodiment of this type of reaction replica material, the oil droplets were enclosed in a permeable layer of film-forming binder. However, it turned out that such papers tended to "run off", i. that the oil with its precursors could come out of the layer even without writing pressure and either stained the adjacent color replica layer or also diffused through the substrate, and if there was a pattern replica layer on the other side of the magazine, stained this.

For this reason, in a newer embodiment, the oil droplets are first enclosed in a first step of their operation in a capsule, the wall of which is formed by a film-forming binder. In a second step, a dispersion of such capsules has since been used to prepare the transfer layer. Since the diameter of such capsules is only a few hundredths of a mm and the wall thickness of these capsules is even smaller, the wall of the capsules consists of only a few molecular layers. In order to reduce the diffusion of, above all, smaller molecules through the walls of such thin capsules, it has also been proposed that the walls of the capsules be sealed by attaching other substances or by placing a second shell on top.

The manufacture of such capsules takes place in only a few, highly specialized companies, and it can easily be seen that this and the need to use more work steps make the production of such copy papers considerably more expensive.

It is an object of the invention to provide a replica material which has the advantages of a known reaction-replication system, but which does not overcome the above or other disadvantages.

3,59220

The invention thus relates to a series of copies consisting of at least two overlapping sheets, each of which is provided on its contacting sides with a layer which in each case contains a reaction component which, when touched, gives a chemical color reaction, whereby the upper sheet on. The invention is characterized in that the copy layer contains an organic precursor on the upper side of the lower sheet, which in a manner known per se forms acid-reactive substances upon rearrangement of the molecules when the molecules are rearranged, and the layer on the lower side of the upper sheet which, under the pressure of writing, can move substantially completely, contains an acid-reactive substance.

The invention will be explained in more detail with reference to the following examples. Example 1: 2 A. Machine-smooth base paper having a thickness of about 40 g / m 2 is provided on one side with a layer made of the following coating composition: 5 parts by weight of Bis- (p-hydroxy-phenyl) -propane 20 "Zinc stearate 10" Iron chloride 10 "Polyvinyl chloride / acetate mixed polymer (eg Vinylite VYHH) 150" Acetone

The binder is dissolved in acetone and the other ingredients are added in the order given and ground thoroughly. The resulting mixture is applied so that, after drying, an application strength of 2 g / m 2 is obtained.

B. On another sheet of the same backing paper, apply the following mixture and dry to give a spreading thickness of 2 g / m 2: “59220 3 parts by weight Rhodamine β-lactone 5" Acrylic resin 15 "Kaolin 150" Petrol

The given ingredients are ground together as in the mixture described in A. The two leaves are superimposed so that the coated sides are in contact with each other, with the leaf described in B below. When writing on the free top surface of the upper sheet A, a red imprint is obtained on the coated side of the lower sheet.

Example 2: A. A mixture having the following composition is prepared as described in Example 1: 10 parts by weight of Attapulgite 20 "Iron stearate 10" Zinc chloride ^ "Ethylcellulose 150" Ethyl alcohol

The mixture is applied on a backing paper so that the application thickness 2 is 2 g / m 2.

B. The following coating composition is used to make the residual layer of the inscription: 3 parts by weight Crystal violet lactone 5 "Ethylcellulose 20" Calcium carbonate 100 "Acetone 2

The application thickness is U g / m. When written through as described in Example 1, a blue imprint is obtained.

Example 3: A. A mixture having the following composition is prepared as described in Example 1: 5 59220 5 parts by weight Bis- (p-hydroxy-phenyl) -propane 20 "Lead stearate 10" Zinc chloride 15 "Titanium dioxide 5" Polyvinyl chloride acetate 20 "Acetone

The mixture is applied on a backing paper so that the application thickness 2 becomes 4 g / m.

B. The following coating mixture is used to make the copy layer: 3 parts by weight Crystal violet lactone 5 "Polyvinyl chloride acetate 20" Titanium dioxide 150 "Trichlorethylene 2

The application thickness is 4 g / m. Writing through as described in Example 1 gives a blue imprint.

Example 4: A. As described in Example 1, a mixture having the following composition is prepared: 10 parts by weight of Zinc Chloride 20 "Cadmium Stearate 30" Calcium Carbonate 6 "Polyvinyl Acetate 5" Phosphoric Acid 200 "Trichlorethylene B. The following parts Malachite green lactone 10 "Carboxymethylcellulose 20" Calcium carbonate 200 "Water 2 6 59220

The application thickness is 4 g / m. Writing through as described in Example 1 gives a green imprint.

Example 5: A. As described in Example 1, a mixture having the following composition is prepared: 5 parts by weight Attapulgite 10 "Aluminum stearate 10" Zinc chloride 30 "Kaolin 5" Gum arabic 200 "Water

The mixture is applied on a backing paper so that the application thickness 2 is 3 g / m 3.

B. The following coating composition is used to make the copy layer: 3 parts by weight Crystal violet lactone 1 "Benzoyl-leukomethylene blue 5" Polyvinyl alcohol 20 "Titanium dioxide 190" Water 2

The application thickness is 7 g / m. Writing through as described in Example 1 gives a blue imprint.

Example 6: A. A mixture having the following composition is prepared as described in Example 1: 7 59220 10 parts by weight Bis- (p-hydroxy-phenyl) -propane 20 "Zinc stearate 10" Barium chloride 20 "Kaolin 10" Acrylic resin (40% commercial solution of aliphatic esters) 200 "Xylene

The mixture is applied on a backing paper so that the application thickness 2 is 3 g / m 3.

B. The copy sheet of the inscription is sheet B. prepared as in Example 2. As in this example, a blue imprint is obtained.

Example 7: A. As described in Example 1, a mixture having the following composition is prepared: 5 parts by weight Attapulgite 20 "Zinc stearate 10" Manganese chloride 20 "Titanium dioxide 10" Acrylic resin dispersion (50% in water) 130 "Water

The mixture is applied on a backing paper so that the application thickness 2 is 5 g / m 2.

B. The copy sheet of the article is a sheet prepared according to Example 5. As in this example, a blue imprint is obtained.

Example 8: A. A coating composition having the following composition is prepared: 8 59220 60 parts by weight Ozokerite 20 "Stearic acid 5" Silica 6 "Attapulgite 20" Zinc chloride

First, the waxy ingredients are melted together with ozokerite and stearic acid, and then the other ingredients are mixed in the order given. The mixture is ground hot and applied from the melt to a suitable substrate with a thickness of 40 to 70 g / m 2.

. 2

The application thickness should be about 4-7 g / m. The leaves A thus obtained can be combined with all the leaves B described in Examples 1-5. The writing color substantially corresponds to the colors given in the examples in question.

Example 9: A. As described in Example 8, a coating composition is prepared from the following: 50 parts by weight of Ceresin 40 "Stearic acid 5" Silica 10 "Bisphenol A (bis- (p-hydroxyphenyl) -i-propane 10" Zinc chloride

The mixture obtained as described in Example 8 is ground and hot applied on a backing paper.

As already shown in Examples 6 to 9, the use of copy sheets B is not limited to a combination with the current transfer sheet A of the same example, but the pages of one example can also be combined with the pages of other examples. The color of the prints obtained then substantially corresponds to the color mentioned in connection with sub-sheet B.

In the above examples, only the upper and lower leaves have been described, from which a series of copies consisting of two leaves in each case can be formed. However, it is also possible to make so-called tabs,