KR20030058342A - Panchromatic material of intaglio plate ink for Super Orlof Intaglio and intaglio plate ink containing the same - Google Patents

Abstract

PURPOSE: An ink used in super orlof intaglio printing and a vehicle for the ink are provided to improve ink transferability, to prevent ink scattering and to obtain improved chemical and alkaline resistances of the printed product. CONSTITUTION: The ink used in super orlof intaglio printing comprises two types of vehicles, i.e., a first vehicle varnish and a second vehicle varnish. The first vehicle varnish is produced by the method comprising the steps of: (i) adding an epoxy resin to a vegetable oil fatty acid in the presence of a catalyst under inert atmosphere, carrying out esterification and cooling; (ii) adding a polyhydric alcohol and a polybasic acid to the product of the step (i), reacting and cooling them; and (iii) adding a polybasic acid to the product of the step (ii), reacting and cooling them, adding a glycol ether solvent and continuing the reaction. The second vehicle varnish is produced by the method comprising the steps of: (a) adding a polyhydric alcohol and a polybasic acid to a vegetable oil fatty acid in the presence of a catalyst under inert atmosphere, carrying out esterification and cooling; and (b) adding an aliphatic hydrocarbon solvent and a polybasic acid to the product of the step (a) and reacting them.

Description

Colorants of intaglio inks for high speed printing presses and intaglio inks containing the same {Panchromatic material of intaglio plate ink for Super Orlof Intaglio and intaglio plate ink containing the same}

The present invention relates to a colorant of intaglio inks for high-speed printing presses and intaglio inks containing the same, and more particularly, it is possible to erode even low-alkaline insoluble solutions when printing intaglios such as banknotes or various securities, and ink transferability during high-speed printing. The ink which can be applied to the Super Orlof Intaglio, which has good and no ink scattering, does not have a bleeding when loading high-definition prints, and has excellent chemical resistance and alkali resistance of printed products. It relates to a colorant used in the preparation of the ink.

In intaglio printing, the indentation of the intaglio is filled with ink, and then the ink on the non-wire portion (except for the indentation) is wiped with a wiping roller, and the soiled wiping roller is wiped off. Washing the stained ink with an alkaline aqueous solution is called a waterless method.

In order to facilitate water quenching, the ink must be easily dispersed in an alkaline solution, and the printed material that has been fixed by transferring the main ink to the paper must be strong in chemical resistance and alkali resistance, and the ink hardening does not occur on the printing machine when printing for a long time. Should be free of ink scattering.

Conventional water-insoluble intaglio inks have a weak alkali resistance and have provided a method for producing alkaline intaglio inks having improved therein (Korean Patent No. 37961), but the intaglio inks thus prepared have a thickness of 100 μm or less. It is possible to print paperless paper in China, and it is difficult to print paperless paper with high depth intaglio ink. In addition, the water-insoluble high-depth intaglio ink disclosed in Korean Patent No. 089670 can obtain a high-depth intaglio print, but it does not have sufficient ink scattering and inevitability during high-speed printing, and the non-inkable intaglio printing ink (Korean Patent No. 128373) When printing at high speed, the ink scattering and the internal curing drying property of the ink film were insufficient, resulting in a problem of separation of prints.

Accordingly, an object of the present invention is to improve the above-described problems, such as the paperlessness in high-depth printing plate, ignorance in a large size paper, anti-misting at high speed printing, internal curing of the ink film, drying properties, etc. It is to provide a first developer used for excellent intaglio ink.

Another object of the present invention is to provide another second developer used in the intaglio ink.

Still another object of the present invention is to provide an intaglio ink containing the first and second color agents.

In order to achieve the above object, the first developer of the present invention adds 10 to 15% by weight of an epoxy resin to 25 to 30% by weight of vegetable oil fatty acid in the presence of a catalyst and an inert gas, while stirring at 230 to 240 ° C for 1.5 to 2.0 hours. A first step of reacting and cooling to 190-210 ° C .; Adding a polyhydric alcohol 14 to 18% by weight and a polybasic acid 18 to 20% by weight to the reactant of the first step to react for 0.5 to 1 hour at 220 to 230 ° C. and to cool to 160 to 180 ° C .; And a third step of adding 6 to 8% by weight of polybasic acid to the reactant of the second step, reacting at 170 to 180 ° C for 0.5 to 1.0 hours, quenching to 150 to 170 ° C, and then adding 20 to 30% by weight of a glycol ether solvent. It is prepared through, has an acid value of 65 to 70, a viscosity of 250 to 350 poise (25 ℃).

In order to achieve the another object of the present invention, the second developer is added in the presence of a catalyst and an inert gas, 20 to 30% by weight of vegetable oil fatty acid, 7 to 10% by weight of polyhydric alcohol and 6 to 10% by weight of polybasic acid, 230 to 240 with stirring A first step of esterifying at 3 ° C. for about 3 to 4 hours and cooling to 190 to 210 ° C .; And 45 to 55% by weight of an aliphatic hydrocarbon solvent and 7 to 10% by weight of a polybasic acid are added to the reactant of the first step, followed by a second step of reacting for 0.5 to 1.0 hours at 170 to 180 ° C., and having an acid value of 45 to 55. Has gel properties.

In order to achieve another object of the present invention, the intaglio ink of the present invention is 25 to 30% by weight of the first colorant varnish, 8 to 15% by weight of the second colorant varnish, 5 to 10% by weight glycol ether solvent, aliphatic hydrocarbon 10-15 wt% of the solvent, 3-5 wt% of the wax, 1-3 wt% of the dispersant, 0.1-2 wt% of the desiccant, 5-15 wt% of the coloring pigment, 5-10 wt% of the iron oxide pigment, and 20-30 of the extender pigment. Weight percent by weight.

Hereinafter, the present invention will be described in more detail.

First, comparing the Super Orlof Intaglio with the large printing paper and the previous intaglio printing machine, the high speed printing machine with the large printing paper has three different colors of ink ejected from each inking device. It is an indirect inking method that puts ink on a plate after joining one collecting drum after passing through it.The hardness of engraving roller is higher than before, so the transferability of ink should be good, and the conventional short inking system More rollers and roller nips, and all the roller diameters except the ink container are small, so the ink stability and ink weather stability are required by strong winsim force when printing at high speed. A composition is needed.

Therefore, in the present invention, two new colorants for manufacturing ink (hereinafter referred to as "first colorant and second colorant varnish") are used. The first colorant varnish is an epoxy resin-modified alkyd varnish having excellent chemical resistance, alkali resistance, stone resistance, etc., and having a whey oil solubility to improve internal curing at room temperature and to prevent ink scattering (inkic acid is proportional to whey). , The second colorant varnish increases the acid value of the resin to improve water dispersibility, in particular to maintain the physical properties of the ink uniformly in printing, and to increase the viscoelasticity of the ink in high-speed printing rheological alkyd having a gel structure excellent in preventing ink scattering effect Gel varnish.

Looking at the manufacturing process of the first colorant varnish and the second colorant varnish in more detail as follows.

Varnish 1

In a one-step reaction, 25 to 30% by weight of vegetable oil fatty acid is added with 10 to 15% by weight of epoxy resin and a small amount of catalyst (lithium hydroxide) and esterified at 230 to 240 ° C. for about 1.5 to 2.0 hours while stirring in the presence of an inert gas (nitrogen). After cooling to 190-210 ° C, 14 to 18% by weight of polyhydric alcohol and 18 to 20% by weight of polybasic acid were added thereto in a two-step reaction, and reacted at 220 to 230 ° C for 0.5 to 1 hour and cooled to 160 to 180 ° C. After adding 6 to 8% by weight of polybasic acid in a three-step reaction, and reacting for 0.5 to 1.0 hours at 170 to 180 ° C, quenching to 150 to 170 ° C, and adding 20 to 30% by weight of a glycol ether solvent to complete the reaction. Epoxy resin modified alkyd varnishes having physical properties of 65 to 70 and a viscosity of 250 to 350 poise (25 ° C.) are obtained.

Epoxy resin used in the present invention is one from the group consisting of epoxy resin of 800 to 900 epoxy equivalent, epoxy resin of epoxy equivalent of 1750 to 2100, epoxy resin of epoxy equivalent of 2400 to 3300 and epoxy resin of epoxy equivalent of 4000 to 6000, or More selected resins may be used.

In the synthesis of the first colorant varnish, as the epoxy resin content is increased or the epoxy equivalent is increased, the molecular weight of the resin is increased so that the chemical resistance of the ink is increased, but the viscosity is increased and the moisture is decreased, and the solvent input amount is increased. Physical property adjustment becomes difficult.

In addition, the glycol ether solvent may be selected from one or more selected from the group consisting of diethylene glycol monobutyl ether, diethylene glycol monoethyl ether and diethylene glycol monomethyl ether.

Second colorant varnish

In a one-step reaction, a trace amount of catalyst (lithium hydroxide) is added to 20 to 30% by weight of vegetable oil fatty acid and 7 to 10% by weight of polyhydric alcohol and 6 to 10% by weight of polybasic acid, and stirred at 230 to 240 ° C while stirring in the presence of an inert gas (nitrogen). After about 3 to 4 hours of esterification and cooling to 190 to 210 ° C, 45 to 55% by weight of aliphatic hydrocarbon solvent and 7 to 10% by weight of polybasic acid are added thereto in a two-step reaction, and 0.5 to 1.0 hours at 170 to 180 ° C. The reaction yields a rheological alkyd gel varnish having an acid value of 45 to 55.

The vegetable oil fatty acid used to prepare the first and second colorants varnish is preferably dehydrated castor oil fatty acid with rapid oxidation drying, and may be used linseed oil, soybean oil fatty acid or a mixture thereof.

In addition, the polyhydric alcohol may be selected from one or more selected from the group consisting of diethylene glycol, triethylene glycol, trimethylol propane, glycerine, trimethylol ethane, pentaerythritol and dipentaerythritol, and polybasic acid As one or more selected from the group consisting of phthalic anhydride, isophthalic acid, maleic anhydride, fumaric acid, adipic acid and trimellitic anhydride.

In addition, the aliphatic hydrocarbon solvent used in the second colorant varnish preferably uses a solvent having a boiling range of 150 to 210 ° C. and / or a solvent having a boiling range of 230 to 320 ° C. to improve gas phase stability and abrasion resistance. .

Meanwhile, according to the present invention, the ink of the present invention is prepared by using the epoxy resin modified alkyd varnish and the rheology alkyd gel varnish as the first and second colorants, and the first colorant varnish is 25 to 30% by weight, 8-15 wt% of the second colorant varnish, 5-10 wt% of the glycol ether solvent, 10-15 wt% of the aliphatic hydrocarbon solvent, 3-5 wt% of the wax, 1-3 wt% of the dispersant, and 0.1-2 wt% of the drying agent. %, Coloring pigments 5 to 15% by weight, iron oxide pigments 5 to 10% by weight, and sieving pigments 20 to 30% by weight, mixed and stirred to prepare a water-insoluble plate printing ink.

However, when the input materials are diversified in this way, the resin properties such as reactivity, chemical resistance, and water dispersibility vary according to the input materials, composition ratio, and reaction conditions, and thus, adjustment of the appropriate composition ratio and reaction condition setting is necessary.

The glycol ether solvent used in the preparation of the ink of the present invention may be selected from one or more selected from the group consisting of diethylene glycol monobuty ether, diethylene glycol monoethyl ether and diethylene glycol monomethyl ether, and may be used for aliphatic hydrocarbons. The solvent is mixed with a solvent having a boiling point of 150 to 210 ° C. and / or a solvent having a boiling point of 230 to 320 ° C. in order to improve gaseous stability and nonfatability, and the wax used to improve the anti-backing effect is montan ester. It is preferable to mix with paraffin wax rather than using stone gum wax alone.

On the other hand, other pigments, extender pigments, desiccants and the like are used as they are used in conventional ink production.

As described above, the present invention is capable of printing high-depth intaglio printing by using a non-impressive intaglio printing method, which is excellent in indelity, ink transferability, and anti-backing aptitude in a high speed printing machine, and particularly in a high speed printing machine having a large printing paper (10,000 sheets / It is a water-insoluble intaglio printing ink which is free from ink scattering and has excellent quality characteristics such as chemical resistance and alkali resistance of printed products.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following examples.

Example 1

Preparation of the First Colorant Varnish

In a one-step reaction, 10.4% by weight of epoxy resin (epoxy equivalent 1750 to 2100) and a small amount of lithium hydroxide were added to 28.4% by weight of dehydrated castor oil fatty acid, followed by esterification at about 230 ° C. for about 2.0 hours with stirring in the presence of nitrogen, and about 200 ° C. After cooling, the reaction was carried out at about 230 ° C. for about 1 hour by adding 14.0% by weight of trimethylolpropane and 18.2% by weight of phthalic anhydride in a two-step reaction, and then cooled to about 170 ° C. 6.0 wt% was added and reacted at about 180 ° C. for about 1.0 hour, followed by quenching at about 160 ° C., followed by the addition of 23 wt% of diethylene glycol monomethyl ether to complete the reaction, thereby obtaining an acid value of about 67 and a viscosity of 300 poise (25 ° C.). An epoxy resin modified alkyd varnish having was prepared.

Example 2

Preparation of Second Colorant Varnish

In a one-step reaction, 26.1 wt% of dehydrated castor oil fatty acid was added with 7.6 wt% of pentaerythritol and 6.2 wt% of isophthalic acid, followed by esterification at about 240 ° C. for about 3 hours with stirring in the presence of nitrogen. After cooling to ℃, 52.4% by weight of high boiling aliphatic hydrocarbon (boiling range 230 to 320 ° C) and 7.7% by weight of trimellitic anhydride were added in a two-step reaction, and reacted at about 180 ° C for about 1.0 hours to give an acid value of about 50 Rheological alkyd gel varnishes having gel properties were prepared.

Example 3

The ink prepared by the preparation of the present invention is the first colorant varnish prepared in Example 1, the second colorant varnish prepared in Example 2, glycol ether solvents, aliphatic hydrocarbon solvents, waxes, dispersants, drying agents, coloring Pigments, iron oxide pigments and extender pigments were mixed in the amounts shown in Table 1 below, stirred, and ground to prepare an ink.

Comparative Example 1

To the ink was prepared by mixing and stirring in the amounts and ingredients shown in Table 1 below.

Ingredient Example 3 Comparative Example 1 Red yellow blue Red yellow blue Varnish 1 25 25 27 Second colorant varnish 10 10 12 Epoxy Modified Alkyd Varnishes 32 32 35 Red Pigment (White Thread) 6 6 Yellow Pigment (Disazo Furnace) 6 6 Blue Pigment (Cyanine Blue) 6 6 Iron oxide pigment 7 7 7 7 Sieving pigment 25 25 28 28 28 32 Montan ester wax 3 3 3 5 5 5 Paraffin wax 2 2 2 Aliphatic Hydrocarbon Solvent (boiling point 230-320 ℃) 7 7 7 Aliphatic hydrocarbon solvent (boiling point range 150-210 ℃) 5 5 5 13 13 13 Glycol Ether Solvent (Diethylene Glycol Monobutyl Ether) 7 7 7 7 7 7 Dispersant 2 2 2 One One One Desiccant (cobalt octoate) One One One One One One system 100 100 100 100 100 100

The ink properties produced in this way have a range of 10-20, yield value (45 ° C., dyne / cm 2) 3,000 to 4,000, drying time (25 ° C., time) 3 to 7, and printing. As a result of printing using a caustic soda solution of 1.0% caustic soda and 0.5% lot oil on a large-format high-speed printing machine, it is possible to print various materials such as transferability, incorruption, printing effect, non-stickiness, and ink scattering prevention property than the ink of Comparative Example 1. The aptitude, chemical resistance and alkali resistance were good quality.

As described above, the present invention is capable of printing high-depth gravure printing because it is excellent in indelity, ink transferability, and anti-backing aptitude in a high speed printing machine by means of a water intaglio intaglio printing method, and in particular, high speed printing (10,000) It is a water-insoluble intaglio printing ink having no quality scattering even after long periods of time) and excellent quality characteristics of chemical resistance and alkali resistance of a printed product.

Claims (5)

In the presence of a catalyst and an inert gas, A first step of adding 10-15 wt% of epoxy resin to 25 to 30 wt% of vegetable oil fatty acid and esterifying at 230 to 240 ° C. for 1.5 to 2.0 hours while stirring and cooling to 190 to 210 ° C .; Adding a polyhydric alcohol 14 to 18% by weight and a polybasic acid 18 to 20% by weight to the reactant of the first step to react for 0.5 to 1 hour at 220 to 230 ° C. and to cool to 160 to 180 ° C .; And 6-8 wt% of polybasic acid was added to the reactant of the second step, the reaction was carried out at 170-180 ° C. for 0.5-1.0 hour, quenched at 150-170 ° C., and the reaction was performed by adding 20-30% by weight of a glycol ether solvent. A colorant varnish for a water-insoluble intaglio printing ink, which is prepared through, having an acid value of 65 to 70 and a viscosity of 250 to 350 poise (25 ° C.). In the presence of a catalyst and an inert gas, The first step of adding 7 to 10% by weight of polyhydric alcohol and 6 to 10% by weight of polybasic acid to 20 to 30% by weight of vegetable oil fatty acid, esterification at 230 to 240 ° C. for about 3 to 4 hours with stirring and cooling to 190 to 210 ° C. ; And 45 to 55% by weight of an aliphatic hydrocarbon solvent and 7 to 10% by weight of a polybasic acid are added to the reaction product of the first step, followed by a second step of reacting 0.5 to 1.0 hours at 170 to 180 ° C. A colorant for a water-insoluble intaglio printing ink, characterized by having: The method of claim 1 or 2, wherein the vegetable oil fatty acid is one or more selected from the group consisting of dehydrated castor oil, linseed oil and soybean oil fatty acid. 25 to 30% by weight of the colorant varnish according to claim 1, 8 to 15% by weight of the colorant varnish according to claim 2, 5 to 10% by weight of a glycol ether solvent, 10 to 15% by weight of an aliphatic hydrocarbon solvent, wax 3 to 5 Water-insoluble intaglio printing, comprising: 1% to 3% by weight, 1 to 3% by weight of dispersant, 0.1 to 2% by weight, 5 to 15% by weight of pigmented pigment, 5 to 10% by weight of iron oxide pigment, and 20 to 30% by weight of extender pigment. ink. 5. The inkless intaglio printing ink of claim 4, wherein the wax is selected from the group consisting of montan ester wax and paraffin wax.