CS196450B2 - Developper for the two-component diazotypic material - Google Patents

Abstract

1373250 Developing diazotype materials ADDRESSOGRAPH-MULTIGRAPH CORP 18 Nov 1971 [26 March 1971] 53684/71 Heading G2C A liquid developer for developing exposed two component diazotype material comprises 1-20 wt per cent of a fatty carboxylic acid having 16 to 18 carbon atoms and from 20-80 wt per cent of morpholine, piperidine or an alkyl morpholine or an alkyl piperidine, diethylenetriamine, N- aminoethylethanolamine or an amine of formula:- wherein R 1 is alkyl, cycloalkyl, alkaryl, alkylol, alkoxy or alkylolalkoxy and R 2 and R 3 are any of the groups specified for R 1 or hydrogen dissolved with or without water by a monohydric alcohol with at least 6 C atoms, a poly-hydric alcohol or a glycolether. The developer may be as disclosed in Specification 1143703 with oleic, stearic, psalmitic or a octadeca-(di or tri) enoic acid added. The developer may be used in the apparatus of Specification 1143702, the acid allowing more uniform distribution of the liquid.

Description

The invention relates to a liquid developer for developing a two-component diazotypic material in which the active ingredient is an organic amine. In particular, the invention relates to a liquid developer composition that can be used under conditions where a small amount of developer liquid is spread over the surface of a two-component diazotypic material bearing a latent image.

A diazotypic reproduction process in which a two-component diazotypic material is developed by applying a small amount of developing fluid, usually not exceeding three grams per square meter, to the surface. This known technique, providing a dry copy directly from the liquid evolution stage, is practiced by supplying controlled amounts of a concentrated developing solution containing an aliphatic amine to said two-component diazotypic material. This technique envisages the formation of a developing area through which exposed diazotypic paper passes and where a controllable small amount of developing fluid is directly applied to the latent image-bearing surface of the paper to effectively produce an azo-dye image resulting in dry odor-free copies prepared for further use.

. ..;. 2 .. _:

The amount of liquid developer contemplated does not exceed 3 grams of developer per square meter of latent image bearing surface, with a preferred amount being between about 0.5 and 2 grams per square meter of surface being developed.

The aforementioned method, described in U.S. Pat. No. 3,446,620, can be implemented using a number of different types of devices designed to apply a controllable amount of liquid. One of these devices is described in U.S. Pat. No. 3,626,833. However, it will be appreciated that due to the design of these developing devices, the application of very small amounts of liquid to the surface is not without problems. ί

In circumstances where the liquid developer is applied at 1 or 2 grams per square meter of two-component diazotypic material, it is necessary that the developing liquid is uniformly applied to the developing surface in the developing area, thereby ensuring that the resulting azo-dye image has a uniform It has been shown that difficulties arise in the case of devices which are intended to achieve uniform application of a small amount of developing fluid over the entire surface of the latent image bearing surface.

Devices equipped with applicator rollers, the surface of which has been specially treated to contain a controlled amount of liquid, interacting with the scraper to further control the controlled amount of liquid, tend to generate high frictional forces in the development region. These frictional forces at the point of application result in tension in the drive mechanism of the device, which in turn leads to an unstable movement of the drive rollers. As a result, there is a noticeable change in speed. Thus, the paper to be developed is progressing through the outer region unevenly resulting in streaking of the image and irregularity of the copies due to irregular application of the developing liquid.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved liquid developing composition for developing a two-component diazotypic material that allows uniform and uniform application of a very small amount of the liquid developing composition to the surface of the diazotypic material. . . .

It is a further object of the present invention to provide an improved liquid composition for developing a two-component diazotypic material which, when applied, would reduce the stresses generated by the developing apparatus under conditions of application of less than 3 grams of said developer. liquid onto the surface of the diazotypic material carrying the latent image.

It is also an object of the present invention to provide an improved developing liquid composition for developing a two-component diazotypic material utilizing a concentrated solution of an aliphatic amine and a carbonic fatty acid enhancing the lubricity of the system to improve uniformity. and · uniformity of application.

The above drawbacks have no liquid developer for the two-component diazotypic material according to the invention, comprising 20 to 79% by weight. % of a liquid organic amine dissolved in a polyhydric alcohol such as hexylene glycol, diethylene glycol, polyethylene glycol, trimethylene glycol, ethylene glycol, propylene glycol, dipropylene glycol and glycerin, in a glycol ether or a monovalent alcohol containing at least 6 carbon atoms, is selected from the group consisting of morpholine, piperidine, lower alkyl morpholine, lower alkylplperidine and an amine of formula

Rz / R1-N \

R3.

wherein R 1 is lower, alkyl, cyclohexyl, lower alkylaryl, lower alkylol or lower alkoxy or lower alkylalkoxy and R 2 and R 5 are lower alkyl, cyclohexyl, lower alkylaryl, lower alkylol, lower alkoxy or lower alkyl alkoxy or hydrogen, characterized in that it contains from 1 to 20% by weight of carboxylic acid. %, wherein the acid has a carbon chain of 18 to 18 carbon atoms.

The content developer according to the invention is preferably oleic acid as a carbon fatty acid. It preferably contains diethylene glycol monomethyl ether as the glycol ether, and may also contain cis-9,12-octadecadienoic acid as the fatty carbon acid. As an organic amine, the developer may advantageously contain an amine. · The general formula

Wherein R and R 'are the same or different and are lower alkyl or hydroxyalkyl, X is hydrogen, lower alkyl or hydroxyalkyl, and n is 2 to 2; 4.

The developer may further comprise alkanolamine or monoethanolamine as the organic amine, and may contain cis, cis, cis-9,12,15-octadecatrienoic acid as the carbon fatty acid.

In the following section of the description, the liquid developer will be described in more detail.

The alkaline component of the developer may be a compound of formula .....

Rz /

Rl — N ·· \

R3 ..

or.

. ' C,

OF

R1 - N -.

Wherein R 1 is alkyl, cycloalkyl, alkylaryl, alkylol or alkoxy- or alkylolalkoxy and R 2 and R 3 are alkyl, cycloalkyl, alkylaryl, alkylol, alkoxy or alkylolalkoxy or hydrogen, and

C —N 'c

is a heterocyclic ring,. like mprfo-. tench. and piperidine.

Preferred amines for; The development compositions of the invention are compounds of the general formula

Wherein R and R‘ are the same or different and are alkyl or hydroxyalkyl radicals or hydrogen, X is hydrogen, alkyl or hydroxyalkyl and n is an integer from 2 to 4.

The term alkylol is identical to the term hydroxyalkyl and the term alkylolalkoxy is. identical to the term polyol or hydroxyalkyloxyalkyl, which terms may be used interchangeably.

The alkaline component may be diluted with a compound selected from the group consisting of a polyhydric alcohol, a glycol ether, a monofunctional alcohol and water or mixtures thereof. The diluent may be present in an amount of 17 to 60 wt. %, preferably in an amount of 30 to 50 wt. %, based on the composition developing composition.

For the development composition according to. The following amines are particularly suitable for use in the invention: monoethanolamine, isopropanolamine, 2- [2-aminoethoxyethanol, triethanolamine, diethanolamine, 2-amino-2-methyl-1-propanone, N-methylethanolamine, dimethylethanolamine, hexylamine and cyclohexylamine. Other amines, such as beta-hydroxyethyltrimethylammonium carbonate, N-aminoethylethanolamine, alkyl-substituted morpholine and piperidine, have the ability to evolve, diazo-image, but these are somewhat less desirable because they either have a noticeable odor or tend to cause undesirable: color ¹ veils.

Auxiliary diluents are used to distribute the developer over the entire developed surface and hence uniform wetting of the surface. The diluent also finds use as a material that can be used to adjust the viscosity of the developer fluid so that the developer can be easily pumped and guided through various piping into the development area. In addition, if the diluent has a greater volatility than the aliphatic amine, it tends to evaporate from the surface of the material being developed, which results in a drying effect on said surface layer.

As the diluent, a polyhydric alcohol selected from the following group may be used: hexylene glycol, diethylene glycol, polyethylene glycol, trimethylene glycol, ethylene glycol, propylene glycol, dipropylene glycol, glycerin;

a glycol ether selected from the following group: ethylene glycol monoethyl ether (Cellosolve), diethylene glycol monoethyl ether, diethylene glycol monomethyl ether, butyl-Cellosolve;

or a monofunctional alcohol selected from 4-methoxy-4-methylpentanol-2 (pentoxyl), 2-ethylhexanol, cyclohexanol, isooctyl alcohol, hexanol.

It has been found advantageous to use polyhydric alcohols which are fully compatible with aliphatic amines and do not adversely affect the quality of reproduction. Also, polyhydric alcohols such as hexylene glycol and glycol ethers improve the separability of the developing liquid over the surface to be developed.

The liquid developing composition of the invention is characterized by the addition of a third component, a carbon chain fatty acid having a 17-18 carbon atom, such as stearic acid, palmitic acid, cis-9-octadecanoic acid, cis, cis-9,12-octadecadiene and cis cis, cis-9,12,15-octadecatriene, in an amount of 1 to 20 wt. %, preferably in an amount of 3 to 15 wt. %. It will be appreciated that the amount of carbon fatty acid to be added to the developing composition to suppress or substantially reduce frictional forces in the developing system may in part depend on the concentration of the organic amine used in the composition. It has been found that at higher concentrations it may prove necessary to heat the developer above room temperature in order to keep the carbonic acid in solution.

Examples of embodiments of the liquid developer compositions of the present invention are provided below. These examples are illustrative only and are not intended to limit the scope of the invention in any way.

. It goes without saying that from a combination of alkanolamine and carbon. fatty acid, resulting in the alkali-ammonium salt. For example, stearic acid produces a monoethanolamine stearate salt. All percentages are by weight unless otherwise indicated; expressly stated otherwise.

Example 1

Monoethanolamine 60%

Hexylene glycol 20%

Cis-9-octadecanoic acid 20%

The ingredients are mixed together in a mixing vessel to form a uniform solution. This solution is fed to the developer.

Example 2

Monoethanolamine 60%

Diethylene glycol monomethyl ether 20%

Diethylene glycol monoethyl ether 17%

Stearic acid 3%

Example 3

2- (2-aminoethoxy) ethanol 40%

Hexylene glycol 25%

Diethylene glycol 10%

Diethylene glycol monomethyl ether 10%

Cis, cis-9,12-octadecadienoic acid 15%

Example 1 a d 4

2- (2-Aminoethoxy) ethanol 50%

Hexylene glycol ^ 5%

Dlethylene glycol monomethyl ether · · '5%

Cis, cis, cis-9,12,15-octadecatrienoic acid 20 2/0

Example · 5

Diethanolamine 40%

Diethylene glycol 30% '

Palmitic Kellite 10%

Example 6 '' Morpholine 5 %%

Monoethanolamine 10%

Dimethylethanolamine 5%

Pentocolové rozp. 2020, Cellosolve 202/0

Hexylene glycol 2525

Cis-9-octadecanoic acid 15%

Example. 7

Monoethanolamine 50%

N-Methylethanolamih _ 10%

Triethanolamine 10 '% ·, Piethy lenglycolmonomethyl ether .... 10%. Cis-9-octadecanoic acid

Example.8.

Monoethanolamine 40%

Ethylene glycol. 30%

Glycerin. .. .10%

Water 10%

Cis-9-octadecanoic acid 10%

Example 9

Monoethanolamine 40% '

Tetraeehylene glycol 30%

Diethylene glycol monomethyl ether 29%. Cis, cis-9,12-octadecaenoic acid 1%

198488

Example 10

Diethylenetriamine 50%

Dlethylene glycol monomethyl ether 25% Hexylene glycol 24% Stearic acid 1% '

Example 11

Hexylamine · 50%%, Hexylene glycol 25 25%

Diethylene glycol. 15%

Cis-9-octadecanoic acid 10 ·%

Example 12 ‘

Cyclohecylamine 50%

Diethylene glycol 25%

Diethylene glycol monomethyl ether 10%

Cis, cis-9,12-octadene-.

kadienová *. . 15%

Example 13. Trlethanolamine ·. 30%

Monoethanolamine. - · 5%

Hexylene glycol. '5%

Di ^^ hylénglykolmonome-.

thylether. -50 o / _o . Kyseeina. c.is-9-octadecane 10%

In all of the above development solutions. the addition of a carbon fatty acid contributes to the necessary lubricity, so that application of the developing liquid by means of a developing device in an amount of 0.5 to

3. The grays per square meter of area to be developed are uniform throughout the area, with no stress in the drive mechanism of the device. The movement of the copying sheet through the developing area is continuous and free of any irregularities, as is the case with developing liquids without the use of a carbon fatty acid, where the azo-dye image is streaked and irregularly formed on the surface of the copying sheet.

Claims (10)

1. ·· Developer for a two-component diazotypic material comprising 20 to 79 wt. O / o liquid organic amine dissolved in a polyhydric alcohol, such as hexylene glycol, diethylene glycol, polyethylene glycol, trimethylene glycol, ethylene glycol, propylene glycol, dipropylene glycol and glycerin, in a glycol ether or monovalent alcohol containing at least 6 carbon atoms, morpholine, piperidine, [lower alkyl] morpholine, (lower alkyl) piperidine, and an amine of the general formula. Rz OF Rl — N \ R 3 wherein R 1 is lower alkyl, cyclohexyl, (lower alkyl) aryl, lower alkylol or lower alkoxy- or lower alkyloalkoxy and R 2 and R 3 are lower alkyl, cyclehexyl, (lower alkyl) aryl, lower alkylol, lower alkoxy- or lower alkylalkoxy or hydrogen, characterized in that it contains carbon fatty acid in an amount of 1 to 20 wt. %, wherein the acid has a carbon chain of 16 to 18. carbon atoms. 2. A developer according to claim 1, characterized in that it comprises oleic acid as the carbon fatty acid. 3. A developer according to claim 1, characterized in that the glycol ether comprises diethylene glycol alkylene monomethyl ether and the like. the carbon fatty acid comprises cis, cis-9,12-octadecadienoic acid. 4. A developer according to claim 1, wherein the organic amine is an amine of the formula R-R 'N-C _n H 2 _-l -OX wherein R and R' are identical or. X is hydrogen, lower alkyl or hydroxy (lower alkyl); and n is an integer from 2 to 4. 5. The developer of claim 4, wherein the organic amine comprises alkanolamine. > 6. The developer of claim 5, wherein the amine is monoethanolamine as the organic amine. 7. A developer according to claim 1, characterized in that it contains cis, cis, cis-9,12,15-octadecatrienoic acid as the carbonic fatty acid. 8. The developer of claim 1, wherein the carbon fatty acid comprises stearic acid. 9. The developer of claim 1, wherein the carbon fatty acid is palmitic acid. 10. The developer of claim 1, wherein the developer comprises from about 3% to about 15% by weight of carbon fatty acid. %, based on the mass of the developing liquid.