CS239779B1 - Colour writing liquid for marking of polyamide - Google Patents

Abstract

The composition of writing and marking is solved fluid. The writing fluid is a solution an organic dye in a solvent consisting of from a mixture of organic acids with organic solvents. Writing Fluid ' then optionally further containing other enhancers migration of writing fluid into polyamide and improving her behavior in writing instruments. The writing fluid is of good quality traces of writing and the productive way of her creation.

Description

(54) Colored writing and marking fluid designed especially for marking and marking of polyamide

The composition of writing and marking fluid is solved. The writing fluid is a solution of an organic dye in a solvent consisting of a mixture of organic acids with organic solvents. The writing fluid then optionally further comprises other substances which increase the migration of the writing fluid into the polyamide and improve its behavior in the writing compositions. Writing fluid achieves a quality writing trace and a productive way of creating it.

The subject of the invention is a colored writing and marking fluid intended in particular for the labeling and marking of polyamide.

According to the prior art described, for example, A.A. No. 117 740, a dispersion of color pigments in 80-90% formic acid, glacial acetic acid, ethylene chlorohydrin or other organic etching or dissolving polyamide is used for this purpose.

The prior art writing and marking fluids have a number of disadvantages. Because they are dispersions, these fluids are unusable in modern writing instruments such as markers or markers and the like.

Pigment dispersions clog fine capillaries and pores of writing and marker systems, writing fluids stop flowing through the system in a short time, rendering the writing device unusable and unusable.

Hitherto known writing fluids need to be applied to the polyamide in an improvised, unproductive manner, which in turn does not guarantee a sufficiently high-quality resulting print trace and which in turn does not guarantee productive and unpretentious work in marking polyamide.

After the application of the known writing fluids to the polyamide, another disadvantage is that the pigment dispersion penetrates very hard, unevenly and imperfectly into the polyamide mass, the more imperfectly the larger the primary pigment particle size, the greater the occurrence of agglomerates, aggregates or other formations. that arise in dispersion systems.

The resulting font trace then exhibits a low abrasion resistance and the life of the inscription that has been produced by the prior art writing fluid is low. These disadvantages are overcome by the press-on and the marking fluid according to the invention.

The essence of the invention is that the writing and marking fluid consists of a solution of 0.50 to 20.00% by weight. % of organic dye in a mixture of 20.00 to 75.00 wt. parts by weight of an aliphatic unsaturated monocarboxylic acid having 1 to 6 carbon atoms in the molecule or a mixture of these acids and 20.00 to 60.00 wt. parts of an organic solvent or a mixture of organic solvents selected from the group consisting of lower aliphatic alcohols having 2 to 6 carbon atoms in the molecule or mixtures thereof, or amides having 1 to 6 carbon atoms in the backbone or mixtures thereof and / or dialkyl amides having 1 to 6 atoms C 1 -C 6 alkyl or mixtures thereof and / or glycol ethers, preferably C 1 -C 6 ethylene glycol monoalkyl ethers or mixtures thereof and / or C 1 -C 6 dlethylene glycol monoalkyl ethers or mixtures thereof, and and / or saturated chlorinated aliphatic hydrocarbons having 1 to 4 carbon atoms and 1 to 4 chlorine atoms or mixtures thereof and / or unsaturated chlorinated aliphatic hydrocarbons having 2 carbon atoms and 2 to 4 chlorine atoms or mixtures thereof and / or chlorinated aromatic hydrocarbons having a number of 6 to 11 carbon atoms and 1 to 3 'chlorine atoms, or mixtures thereof.

Optionally, the writing and marking fluid of the present invention may further comprise other substances which increase its dissolution effect against the polyamide and thus further increase the migration of the fluid into the polyamide and which further increase the abrasion resistance of the resulting print trace.

The use of phenol, ortho, -meta, - and para-cresol, pyrocatechin, resorcinol and hydroquinone, or mixtures thereof, in amounts of up to 30.00 wt. parts in 100.00 wt. writing and marking fluid parts.

Optionally, surfactants may be used to improve the flow of writing fluid through the writing system of the marker and marker. The use of surfactants from the group of sodium and / or potassium salts of dialkyl sulfosuccinates having 1 to 8 carbon atoms in alkyls in amounts of up to 5.00 wt. parts in 100.00 wt. parts of writing fluid.

Instead of said organic acids, the writing fluid may comprise substantially any other acid. For example, hydrochloric, sulfuric, phosphoric, nitric and the like can be used.

The writing and marking fluid of the present invention then exhibits a number of advantages and improvements. The combination of acids with organic solvents creates a very efficient dissolution system that ensures perfect solution even when very high dye concentrations are used.

The organic solvents can then be used to achieve the optimum boiling point of the writing fluid, both in relation to the method used to apply the writing liquid to the polyamide and in relation to the type of acid used.

The writing and marking fluid of the present invention can then be used in markers and markers to provide a very simple yet highly productive method of applying the writing fluid to the polyamide while at the same time achieving and maintaining a high-quality resulting ink trace.

The writing fluid according to the invention then exhibits a deeper and more uniform migration into the polyamide, which results in a substantially higher abrasion resistance and a longer service life of the resulting polyamide trace.

The migration of writing fluids to polyamide is further increased by the presence of phenol, cresol, resorcinol, and the like. The surfactants reduce the surface tension of the writing fluids, improve its flow through the writing system of markers and markers, thereby further improving their writing properties.

The invention is illustrated by the following examples:

Exemplary black writing liquid aniline black formic acid dimethylformamide

10.00 wt. 70.00 wt. 20.00 wt. parts

Example 2

Gray writing fluid azo dye 0.50 wt. parts acetic acid 40.00 wt. parts propionic acid 35,00 wt. parts hexanol 14.50 wt. parts diethylene glycol monomethyl ether 10.00 wt. parts

Example 3

Black writing liquid aniline black 10.00 wt. parts formic acid 50.00 wt. parts hexanoic acid 10.00 wt. parts butanol 15.00 wt. parts formamide 15.00 wt. parts

Example 4

Brown writing liquid

azo dye 5.00 wt. parts formic acid 50.00 wt. parts butyric acid 25,00 wt. parts dibuty1formamid 10.00 wt. parts tetrachlorethylene 10.00 wt. parts

Example 5

Red writing liquid xanthene dye 20,00 wt. parts acetic acid 15.00 wt. parts valeric acid 5.00 wt. parts butanamide 15.00 wt. parts dihexylhexanamide 15.00 wt. parts chlorobenzene 30,00 wt. parts

Example 6

Black writing liquid

aniline black 10.00 wt. parts formic acid 30.00 wt. parts propionic acid 15.00 wt. parts dibutylacetamide 5.00 wt. parts ethylene glycol monopropyl ether 30.00 wt. parts te tr achlórme than 10.00 wt. parts

Example 7

Orange writing liquid azo dye 20,00 wt. parts propionic acid 45,00 wt. parts chlortoluene 30,00 wt. parts 1,2-diohloroethane 5.00 wt. parts

Example 8

Black writing liquid aniline black 10.00 wt. parts formic acid 40.00 wt. parts butyric acid 30,00 wt. parts triohlornaftalen 10.00 wt. parts chloropropane 10.00 wt. parts

Example 9

Orange writing liquid azo dye 5.00 wt. % acetic acid 50.00 wt. parts of trichlorethylene 25.00 wt. propanol 25.00 wt. parts of sodium bis-2-ethylhexylsulfosuccinate

5.00 wt. parts

IN.

Example

Black writing liquid

aniline black 10.00 wt. parts formic acid 60,00 wt. parts ethylene glycol monoethyl ether 10.00 wt. parts chlorobutane 10.00 wt. parts chloronaphthalene 10.00 parts 1 and d 11 Brown writing liquid azo dye 8.00 wt. parts acetic acid 10.00 wt. parts butyric acid 2.0 wt. parts rezorcin 30,00 wt. parts propanol 25,00 wt. parts acetamide 25,00 wt. parts 1 to d 12 black writing liquid aniline black 10.00 wt. parts formic acid 45,00 wt. parts dlethylformamide ’ 25,00 wt. parts d ie thylene glycol monobutyle ther 20,00 wt. parts

Claims (3)

SUBJECT OF THE INVENTION 1. A color writing and marking fluid for marking and marking polyamide, characterized in that it consists of a solution of 0.50 to 20.00% by weight. % of organic dye in a mixture of 20.00 to 75.00 wt. parts by weight of an aliphatic unsaturated monocarboxylic acid having up to 6 carbon atoms in the molecule, or a mixture of these acids and 20.00 to 60.00 wt. parts of an organic solvent or a mixture of organic solvents selected from the group consisting of lower aliphatic alcohols having 2 to 6 carbon atoms in the molecule or mixtures thereof and / or amides having 1 to 6 carbon atoms in the backbone or mixtures thereof; C 1 -C 6 alkyl and / or mixtures thereof, and / or glycol ethers preferably C 1 -C 6 ethylene glycol monoalkyl ethers or mixtures thereof, and / or C 1 -C 6 diethylene glycol monoalkyl ether or mixtures thereof and / or saturated chlorinated aliphatic hydrocarbons having 1 to 4 carbon atoms and 1 to 4 chlorine atoms or mixtures thereof, and / or unsaturated chlorinated aliphatic hydrocarbons having 2 to 4 carbon atoms and 2 or 4 chlorine atoms or mixtures thereof and / or chlorinated aromatic hydrocarbons having 6 to 11 carbon atoms and 1 to 3 chlorine atoms, or mixtures thereof. 2. A colored writing and marking fluid as recited in claim 1 wherein at 100.00 wt. The parts optionally further comprise up to 30.00 wt. parts of phenol and / or ortho-cresol, and / or meta-cresol and / or para-cresol, and / or pyrocatechin, and / or resorcinol, and / or hydroquinone. 3. A coloring and marking fluid as claimed in claim 1, wherein at 100.00 wt. parts optionally further comprising up to 5.00 wt. % of surfactants from the group of sodium and / or potassium salts of dialkylsulfosuccinates having 1 to 8 carbon atoms in alkyls.