SU422171A3 - COPY PAPER P T BFOND O '^ HEGO - Google Patents

Description

This invention relates to a copy paper for a reproduction method using alcohol.

Copier papers for alcohol reproduction are known, consisting of a fabric or other suitable film or sheet material, coated with a colorless derivative of a basic dye, for example, crystal violet lactone. When copying, copy paper is placed on the coated side of the surface of the paper to be copied, on the other side of which the labels are printed, causing the coating to be transferred as a colorless reversed image onto the first of the paper surfaces to obtain the main copy at the contact areas of the copier paper. and paper for copying. Thereafter, the paper is contacted to obtain a copy in contact with sheets of paper moistened with a solvent, for example ethanol, containing an acidic substance. The solvent dissolves part of the primary dye derivative and transfers it to each sheet of paper, where it reacts with an acidic substance to form a dye that reproduces the original inscription or printing on paper to make a copy.

A disadvantage of the known copying paper is that the derivatives of the basic dyes used therein tend to form sticky coatings which cannot be easily and satisfactorily applied to the fabric or other film or sheet material and can result in fuzzy copies or copies that have poor light resistance. The object of the present invention is to manufacture carbon paper having improved properties.

For this purpose, a copy paper is made to produce a master copy with an alcohol-based pyrotechnic method consisting of a substrate and a colorless coating on it containing a leucoauramine compound of the formula I,

RX, E.

„N-A-CH-B-

R-- i

/

X yi

25

where A and B are substituted or unsubstituted aromatic groups; Ri, R, R, and R are hydrogen atoms, substituted alkyls, aralkyls, cycloalkyls, or aryls, or form part of the hydrocarbon chain that, together with the nitrogen atom linked to it, forms a heterocycle;

X is a hydrogen atom, a hydroxyl, unsubstituted or substituted amino, alkyl, cycloalkyl, aralkyl, or aryl group;

Y is an unsubstituted or substituted alkyl, cycloalkyl, aralkyl, aryl or heterocyclic group, X and Y together with the nitrogen atom linked to them can form a substituted heterocycle.

Aromatic grooves A and B are, in particular, 1,4-phenylene, or 1,4-naphthylene, which may contain as substituents alkyl, alkoxy or trialkylammonium groups or halogen atoms.

As R1, R3, R4, X and Y, there may be substituted lower alkyl groups, for example, ethyl, iropyl, butyl, R-OXYETHYL, | 3-chloroethyl, p-trimethylammonium methyl, or p-pyridyl-1-ethyl group, substituted aralkyl groups, for example 4-methoxybenzyl, 2-methylbenzyl, substituted cycloalkyl groups, for example 2-methylcyclohexyl, 4-methylcyclohexyl, substituted aryl groups, for example 2-methylphenyl, 4-methylphenyl, 3-chlorophenyl, naphthyl-2.

Examples of heterocycles that can be formed by R and R or R and R can also be five- or six-membered picals, such as piperidine, N-methyliperazine or morpholine ring.

Preferably, it is a hydrogen atom or, together with Y and a nitrogen atom, forms a heterocyclic ring such as a pyrrolidine, piperidine, morpholine or iierazine.

The substituted amino groups that may be represented by X are dialkylamino groups, such as dimethylamino and diethylamino.

An example of a substituted aryl group which may be represented by Y is 2-, 3-, and 4-methylphenylalkyl or halogen-substituted aryl.

The heterocyclic groups that can be represented by Y are such five-membered, six-membered, saturated or unsaturated heterocycles, such as pyridium, piperidine, pyrrolidine or morpholine.

Leucoauramide compounds of formula I can be obtained by reacting compounds of formula II

,,one

N-A-CH-B-N.

R

N / H

II

7, R

where A, B, R, R2, R and R are as defined above;

2 is a sulfur atom or, preferably, an oxygen, and R is an alkyl group, or, preferably, a hydrogen atom, with an amine, of the formula

Y-NHX, where X and Y are as defined above.

As compounds of formula II, Michlera hydrol, bis- (4-diethylaminophenyl) -methanol, bis- (2-methoxy-4dimethylaminophenyl) -methanol, bis- (4-iiperidinophenyl) -methanol, bis (2-methyl- 4-dimethylaminophenyl) -methanol and bis- (N-methyl-b-tetrahydroquinolinyl) -methanol, bis- (4-dimethylaminophenyl) methyl merciptan and their alkyl ethers.

Ethanolamine, aniline, N-methylaniline, toluidines, anisidines, phenylhydroxylamine, benzylamine, α-naphthylamine, piperidine, morpholine and other primary or secondary amines can be used as the Y-NHX compound.

Leucoauramine compounds are conveniently prepared in a solvent such as water, a degraded or aromatic solvent,

for example, chlorobenzene, xylene or toluene, at a temperature of from 20 to 150 ° C, preferably from 60 to 100 ° C.

The coating comprising the leucoauramine compound may be a wax and

such as carnauba, sugar cane, bee, Chinese insects, candelli, ozocerite, raw montan wax or mixtures of such waxes; petroleum products such as petrolatum; polymeric material such as vinyl acetate and vinyl chloride sonolymer, polystyrene, ethyl cellulose and cellulose acetate, mineral oil, lanolin, tallow and vegetable or animal oil, hoofed fat or castor oil.

The leucoauramine compound is used in an amount of 15-65%, preferably 45-55%, relative to the weight of the total coating. Coverage can be obtained by conventional

methods, for example, processing of ingredients at an acceptable temperature on the rollers or a tacol mixer as a three-roll mixer, heatable ball mill or millstone mill.

Films of paraffin wax, ethyl cellulose, polyvinyl chloride, or polyvinyl acetate are used as materials for precoating. Coating on the material iodlozhki that

may be a fabric, film or sheet material, may be applied using any suitable devices, such as rollers, a knife, etc. Preferably, the coating weighs 15-

25 g per 1 m2.

To prevent the formation of sticky coatings and fuzzy copies on them, it is desirable that the leucoauramine compound be dispersed in the coating and not dissolved.

in it or made in the form of a melt.

Therefore, the binder should be selected so as to eliminate the dissolution of the leucoauramine compound. The temperature should be maintained below the melting point of the leucoauramine compound. Conveniently, the binder has a lower melting point than the leucoauramine compound.

The paper for the copy and for transferring the image from the main copy is impregnated by known methods with a solvent for the leucoauramine compound, which may contain an acidic substance.

The solvent may, for example, be a lower alcohol, such as methanol, ethanol, n-propanol or isopropanol.

It is also desirable that the solvent contains a higher boiling point polar solvent, such as benzyl alcohol, since otherwise the first copies give only a weak image.

The acidic substance may be present in the copying fluid or on paper to make a copy. The copying fluid may contain an organic acid, such as tannic acid, WINE, salicylic, anthranilic or benzoic ACID, or an inorganic acid, such as SALTIC acid. To reduce the degree of corrosion of the image and equipment, it is desirable that acid boiling is present in copy paper. In these cases, it may be a so-called acidic mineral, for example, kaolin, talc, bentonite, calcium sulfate, calcium citrate, magnesium trisilicate, calcium phosphate or barium sulfate. An acid-treated coating containing acids such as dubillia, oleic acid, gallium, lauric acid, phosphotungstic or phosphomolybdeic acid may be used, possibly in combination with precipitated calcium carbonate.

Example 1. 42 weight, part bis - (“- dime lamt1nophenyl-morpholine-methane is mixed with e of 30 parts of liquid gray to pyaub wax and 70 parts by weight of vaseline at 80T. Smog. Passed through a heated three-woven blender until until the degree of dispersion corresponds to the Hegman scale of 6. The dispersion is applied as a coating on a melinex polyester film to obtain a coating weighing 18.0 g per 1 m with good flow.

After 3 days, optimum hardness is achieved. The film is placed side by side, ileupte coating, on the paper for the main copy. On paper, to make a master copy, an inscription is made using a typewriter. On paper, to obtain a master copy, a reverse print is formed with a clear and complete transfer of the coating from the "melinex" film.

on the paper to get the main copy in areas that were acted by the button key. Paper to make a master copy is used in an alcohol machine to reproduce an image on a number of sheets of paper to make copies. Copy paper is impregnated with a mixture of 86 wt. h, 94% ethanol. 10 wt. including benzyl alcohol and

4 wt. including salicylic acid, with the first copy of a bright blue prints. The color appears fully after 10 minutes.

Use of a leucoauramine compound is obtained by heating a paste from a hydrol.

Michler (410 g), morpholine (104 g) and ethanol (1000 ml) at reflux temperature for 4 hours, cooling the mixture overnight, separating the crystalline solid product, rinsing it with ethanol and DRYING. Get 147 g

product with so pl. 148 ° C.

EXAMPLE 2 A mixture to obtain COATING is prepared by mixing 4 HRV. h. Bisp - dittIt.t. I nolonil - morin olinmet on.

4 wt. h. liner ln m m weak viscosity and R weight. part ltr. tilketon in conditioner for cn Red Devil juice with glass of pearls, spread out 3 mln for 1 in with the addition of 3 wt. including toluene and 0.5 wt. including a copolyopa of vinyllapate-vinyl chloride, mixing with an electric puller and diluting 4 weight. including methyl ethyl ketone.

On the fabric of the n b taper coating ttz composition. containing polyvinyl alcohol

and ethylcellulose, for MSYa, of a weak acidity of a fabric that would otherwise cause a color to appear when applying a coating containing a leucoauramine gloss.

The prepared mixture is applied to the nl treated fabric and the fabric is USED (as in Example T) to obtain a reverse print on the paper to obtain a master copy. Get a clear print with full portability of the coating.

Printer 1 paper is used to make a master copy. For processing copies, paper treated with clay attapulum is used using a mixture of

90 weight. h. 94% of its ethanol, n and 10 wt. including benzyl alcohol as copier. Get clear, purple-blue copies from the first copy. The color appears fully 10 minutes after copying.

The table lists suitable leucoauramine compounds of the formula I, where for the values of A and B the phenyl means a 1,4-phenylene group.

Subject invention

Claims (5)

1. Copy paper for the manufacture of the main copy used in the alcohol reproduction method, consisting of a substrate and a coating on it containing a colorless dye derivative, characterized in that, in order to improve the properties of the copy layer, a colorless dye derivative is used leucoauramine compound of the formula Vb „N-A-CH-B-N: "I / X yi where a and b are unsubstituted or substituted aromatic groups; R, R R3 and R are hydrogen atoms, unsubstituted or substituted alkyl groups, aralkyl, cycloalkyl or aryl groups, or form part of the hydrocarbon chain which, together with the nitrogen atom linked to it, closes the heterocyclic ring; X is a hydrogen atom, a hydroxyl, unsubstituted or substituted amino, alkyl, cycloalkyl, aralkyl, or arcl group; Y is a substituted alkyl, cycloalkyl, aralkyl, aryl, or heterocyclic group; X and Y together with the nitrogen atom linked to them can form an unsubstituted or substituted heterocyclic ring. 2. Copier paper according to claim 1, with the exception that leucoauramine of the formula R In which R, R2, R and R- are the same or different alkyls; R is a hydrogen atom or an alkyl; X is a hydrogen atom, unsubstituted or substituted alkyl, aryl, aralkyl; Y is unsubstituted or substitutional aryl, alkyl with hydroxyl, ether, monoalkylamino or dialplamino, heterocyclic, acylamino or sulfonamide group, X and Y together with the nitrogen atom can form a heterocyclic ring. 3. A copy paper according to claim 2. O TL and the fact that in the leucoauramine compound each of R, R, R is methyl, each R is a hydrogen atom, X is a hydrogen atom, is a non-specific or substituted aryl radical , or X and Y together with the nitrogen atom form a heterocycle ring. 4. Copier paper on PP. 1-3, characterized in that the coating contains from 15 to 65% of the leucoauramine compound in terms of fire resistance to the total weight of the coating. 5. Copier paper on PP. 1-4, characterized in that a pre-coating is applied between the substrate and the coating.