KR20200028175A - Intaglio printing forgery prevention ink composition - Google Patents

Abstract

The present invention relates to an anti-tampering ink composition for printing an intaglio and a print medium comprising the same. The present invention has an effect of having high light reflectivity due to low light scattering properties and gloss particles, which are excellent in three-dimensionality and tactile feel, and are difficult to see in ordinary colored inks, has an effect that various forgery and alteration are impossible, including image duplication, and has high transparency and excellent color purity when pigment is added, and is eco-friendly and has an effect of minimizing the use of a solvent by not using a petroleum-based solvent or being used to the minimum required.

Description

{Intaglio printing forgery prevention ink composition}

The present invention relates to a forgery-prevention ink composition for intaglio printing.

The traditional intaglio printing technology, which is used professionally in the printing of world currencies, such as Korean paper money and the US dollar, is a prototype technology of intaglio printing technology that is the matrix developed by modern commercial gravure printing technology. This intaglio printing technology, unlike the simple docking ring of gravure printing, is a high-cost printing that requires the removal of extra ink other than the ink filled in the intaglio recess by the high-pressure wiping cylinder due to the specificity of using a high-viscosity printing ink containing a high content of solid components. Technology. This technique is difficult to easily replace with other printing methods, and it has been used to date for printing banknotes that require anti-counterfeiting by allowing the formation of a thick ink layer of sharp lines.

As an ink used in intaglio printing technology, a metallic ink having better security is mainly used. The metallic ink means an ink containing metal particles such as metal flakes that express metal luster by reflecting light or particles that change the refractive index. Cards, bills, and the like printed with the metallic ink have different characteristics such as color tone and gloss compared to those made with ordinary ink, and thus it is easy to discriminate the counterfeits even with the naked eye.

However, in the case of intaglio printing using a metallic ink, there is a limitation that the color tone, gloss characteristics, etc. of the metallic ink are not effectively expressed due to problems such as reduction in color purity of the pigment, deterioration of gloss, and induction of light scattering.

KR 10-2001-0092226 A (2001.10.24)

An object of the present invention is to provide an anti-counterfeiting ink composition for printing intaglio and having a high light reflectivity due to low light scattering and gloss particles, while having excellent three-dimensionality and tactile feel, and a printing medium comprising the same.

Accordingly, an object of the present invention is to provide a forgery-preventing ink composition for intaglio printing, which is impossible in various types of forgery, including image duplication, etc., and a printing medium including the same.

Another object of the present invention is to provide an anti-counterfeiting ink composition for printing intaglio printing having excellent three-dimensionality and tactile feel, high transparency, and excellent color purity when pigment is added.

Another object of the present invention is to provide an environment-friendly, tamper-resistant ink composition for printing intaglio that can minimize the use of a solvent and a printing medium comprising the same, which can minimize the use of a petroleum-based solvent.

An anti-tampering ink composition for printing intaglio according to the present invention includes: a wax compound comprising anionic surface-modified base material particles and a cationic aqueous wax emulsion; And glossy plate-like particles.

In one example of the present invention, the wax compound may further include silicone quartz.

In one example of the present invention, the wax compound may further include a siloxane-based polymer having a hydroxy or amine group.

In one embodiment of the present invention, the wax compound is an olefin-based wax, paraffin wax, rico wax, monta wax, candelilla wax, emulsifying wax, olive wax, japen wax, micro crystallin wax, and modified waxes thereof. It may further include any one or more additional wax components selected.

In an example of the present invention, the anionic surface-modified base material particles may be metal oxide particles having a sulfonate group on the surface.

In one example of the present invention, the wax compound may include 0.5 to 20% by weight of the anionic surface-modified base material particles, 5 to 30% by weight of a cationic water-based wax emulsion, and the balance of water.

In one example of the present invention, the wax compound is 0.5 to 20% by weight of anionic surface-modified base material particles, 5 to 30% by weight of a cationic aqueous wax emulsion, 1 to 20% by weight of silicone quartz, hydroxy or amine groups The branch may contain 0.1 to 5% by weight of the siloxane-based polymer and the remaining amount of water.

In one example of the present invention, the glossy plate-like particles are metal plate-like particles; And plate-like particles coated with a metal oxide on the surface of the base material. It may include any one or more selected from the like.

The anti-tampering ink composition for printing intaglio according to an embodiment of the present invention may further include fumed silica nanoparticles.

The anti-tampering ink composition for printing intaglio according to an embodiment of the present invention may include 60 to 600 parts by weight of glossy plate-like particles and 30 to 300 parts by weight of the fumed silica nanoparticles with respect to 100 parts by weight of the wax compound.

The anti-tampering ink composition for printing intaglio according to an embodiment of the present invention may include any one or two or more selected from colorants, solvents, surfactants, desiccants, and lubricants.

The present invention can provide a printing medium intaglio printing with the anti-tampering ink composition for printing intaglio.

The anti-tampering ink composition for printing intaglio printing of the present invention and a printing medium containing the same have an effect of having high light reflectivity due to low light scattering properties and gloss particles while having excellent three-dimensionality and touch.

The anti-tampering ink composition for printing intaglio of the present invention and a printing medium containing the same have an effect that various forgery itself is impossible, including image duplication.

The anti-tampering ink composition for printing intaglio printing of the present invention and the printing medium containing the same have excellent three-dimensionality and tactile feel, yet have high transparency and excellent color purity when pigment is added.

The anti-tampering ink composition for printing intaglio printing of the present invention and the printing medium containing the same are environmentally friendly because they may or may not use a petroleum-based solvent, and have an effect of minimizing the use of a solvent.

Even if the effects are not explicitly mentioned in the present invention, the effects described in the specification expected by the technical features of the present invention and the inherent effects thereof are treated as described in the specification of the present invention.

Hereinafter, the forgery prevention ink composition for printing intaglio according to the present invention will be described in detail.

Unless otherwise defined in technical terms and scientific terms used in the present specification, those skilled in the art to which this invention belongs have meanings commonly understood, and the following description makes the subject matter of the present invention unnecessary. Descriptions of known functions and configurations that may be obscured are omitted.

As used herein, the singular form of the term may be interpreted as including the plural form unless otherwise specified.

 The units of% used in the present specification without specific mention mean the weight% unless otherwise specified.

An anti-tampering ink composition for printing intaglio according to the present invention includes: a wax compound comprising anionic surface-modified base material particles and a cationic aqueous wax emulsion; And glossy plate-like particles.

As the ink composition contains the wax compound, the transparency and particle size are improved, especially in the case of printing by an intaglio printing method, as compared with the case of the conventional general wax, and the gloss and glitter characteristics are improved along with the metallic color. Intaglio printing is excellent in three-dimensional feel because of the thick print pattern, but for this reason, there is a problem in that color purity and transparency are deteriorated compared to inkjet and laser printing methods. However, in the present invention, as an anionic surface-modified base material particle, a cationic water-based wax emulsion, and a wax compound containing water are used, it has low light scattering properties and high light reflectivity due to gloss particles that are difficult to see in ordinary colored inks. It has excellent three-dimensionality and tactile feel, yet has high transparency and excellent color purity when pigments are added. In addition, as described above, the three-dimensional, tactile, and tactile characteristics are excellent, and thus tactile perception-based forgery and alteration prevention can be maximized, and various forgery and alteration, including image duplication, are impossible.

In the wax compound, the anionic surface-modified base material particles may be anionic charged particles, specifically, abrasive particles. The base material may be metal such as aluminum, ceramic such as silicate, glass, or the like. Preferably, it may be metal oxide particles having a sulfonate group on the surface. Various metals may be used as the type of the metal, but preferably, when the glossy plate-like particle includes a metal-based component, the same metal may be used. For example, the metal is aluminum, that is, the metal oxide particles may be alumina particles. Specifically, the metal oxide particles having a sulfonate group on the surface may be prepared by reacting alumina particles with sodium paratoluene sulfonate. The particles are preferably in nanometer units, specifically, having a particle size of 200 nm or less, and more specifically 10 to 200 nm. However, this is only described as a preferred example, of course, the present invention is not limited to this.

In the wax compound, the cationic water-based wax emulsion may be an aqueous emulsion in which wax particles are dispersed, and specifically, the emulsion may include an emulsifier such as ethylene glycol or an aliphatic amine derivative, and wax particles may be dispersed in water. . At this time, the emulsifier may be included in 3 to 25% by weight based on the total weight of the cationic water-based wax emulsion, and water may be included as a residual amount. As a specific example, the cationic water-based wax emulsion may be an aqueous emulsion containing 7 to 20% by weight and specifically 10 to 15% by weight of solid wax particles having an average particle diameter of 10 to 200 nm. At this time, the wax is a cationic wax, which is a wax having a cationic active component, such as carnauba wax, candelilla wax, orange-peel wax, montan wax, and re-pen (japan) wax, bead wax, and the like can be used, and preferably, carnauba wax is preferably used.

In a preferred example, the wax compound may further include silicone quartz. When a silicone quartz is further used, it is possible to impart a more improved gloss effect while preventing deterioration of dimensionality and color purity. As a specific example, the silicon quartz may be ammonium functional silicone.

The silicone quartz may mean a polysiloxane having a quaternary ammonium group or an emulsion composition containing the same. At this time, the composition may contain 20 to 80% by weight of the polysiloxane having the quaternary ammonium group. In addition, the emulsion may include an emulsifier such as ethylene glycol or an aliphatic amine derivative, such that the polysiloxane particles are dispersed in water.

As a specific example, the silicon quartz may be a compound represented by Formula 1 below.

[Formula 1]

In Chemical Formula 1, R ²¹ , R ²² , R ²³ , R ³⁰ and R ³¹ may be each independently a hydroxy, phenoxy, alkoxy or monovalent hydrocarbon group, and R ²⁴ , R ²⁵ and R ²⁷ are independently of each other It may be a monovalent hydrocarbon group, R ²⁸ may include a monovalent hydrocarbon group or nitrogen and at least a portion of the -R ¹ -Z-Q3 group may be present, and R ²⁶ and R ²⁹ include nitrogen and at least partially -R ¹ -Z-Q3 group or a plurality of groups may be present, and -R ¹ -is a divalent hydrocarbon group capable of selectively bonding an ether or ester functional group or -R ¹⁷ N (Q1) R ^18- It may be any one, -R ¹⁷ -and -R ¹⁸ -may be an independent divalent hydrocarbon group capable of selectively bonding an ether or ester functional group, -Q1 is -CH ₂ CH (OH) CH ₂ N ⁺ ( ^{R 4) (R 5) (} R 6) X -, hydrogen, or optionally hydroxy, diol, amide, ether or Thermal switch may first date monovalent hydrocarbon capable of binding a functional group, R ^4, R ⁵ and R ⁶ may be an independent monovalent hydrocarbon group, X ^- may be a halogen ion that corresponds, -Z- is -N ( Q2) - may be, -Q3 and -Q2 are independently from each other _{-CH 2 CH (OH) CH 2} N + (R 4) (R 5) (R 6) X -, hydrogen, optionally hydroxy, diol , May be a monovalent hydrocarbon group capable of bringing an amide, ether or ester functional group, a, b, d, e and g are all integers of 0 or more, a is 0 to 2 + g, b is 0 to 2 + g, d is 0 to 500, e is 0 to 100, g is 0 to 100, a + b is 2 or more, e + b is 0, provided that at least some of Q1, Q2 and Q3 are -CH ₂ CH (OH) _{^{CH 2 N + (R 4)}} (R 5) (R 6) X - a.

As another specific example, the silicon quartz may be polydimethylsiloxane having a quaternary ammonium group, and may contain one or more organic radicals. The organic radical may be, for example, an organic radical of the general formula -QN (CH ₃ ) ₂ -R, where Q represents a bridge member having 2 to 6 carbon atoms, which also contains one or more components such as OH. May contain, R represents alkyl having 1 to 18 carbon atoms, specifically 1 to 3 carbon atoms, and R is, for example, OH, Cl, NH ₂ , COOH, OCH ₃ or acyl-NH having 2 to 18 carbon atoms. Represents alkyl which may be substituted internally or at the terminal.

In addition, the silicon quartz may have a viscosity of 150 to 500 mPas (20 ° C acc. To Brookfield), and may have a density of 0.8 to 1.2 g / ml. The silicon quartz molecule can actually unfold to provide a flat condition and provide a smooth surface for adhesion of the wax particles. Suitable silicone quartz is disclosed in detail in U.S. Patent Nos. 5,592,5341, 660,7717, and 664637, and is commercially available as EVONIK's TEGO Polish Additive Q70 or Degussa AG's Rewoquat®SQ, so it may be used. However, these specific matters are only described as a preferred example, of course, the present invention is not limited thereto.

In a preferred example, the wax compound may further include a siloxane-based polymer having a hydroxy or amine group. When this is satisfied, the three-dimensionality of the intaglio printing can be improved by inducing stronger bonding with other components, and the glossiness can be further increased. Specifically, the weight average molecular weight of the siloxane-based polymer may be 10,000 to 200,000, and the density may be 0.9 to 0.99 g / ml. However, these specific matters are only described as a preferred example, and of course, the present invention is not limited thereto.

In one example of the present invention, the wax compound may further include a wax component to suit the printability of the ink composition. As a specific example, the wax component is any one or two selected from olefin-based wax, paraffin wax, rico wax, candelilla wax, emulsifying wax, olive wax, Jaffeen wax, micro crystalline wax, and modified waxes thereof. Although it may include the above, it is of course that various known waxes may be used.

The composition ratio of the wax compound is not particularly limited, but anionic surface-modified base material particles 0.5 to 20% by weight, specifically 1 to 15% by weight, cationic aqueous wax emulsion 5 to 30% by weight, specifically 7 to 25 It may be to include a weight percent, at this time may include water in the remaining amount. When the wax compound contains silicone quartz, the silicone quartz may be included in 1 to 20% by weight, specifically 3 to 15% by weight, and when the wax compound further comprises the siloxane-based polymer, 0.1 to 5% by weight %, Specifically 0.3 to 3% by weight. At this time, the rest may be used as the remaining amount of water.

In the ink composition, the glossy plate-like particles may be irrespective of the metallic properties visually by reflecting the irradiated light, and for example, any one or more selected from plate-like particles coated with the surface of the base metal and metal plate-like particles, etc. It may include. It is preferable that the metal oxide is plate-like particles coated on the surface of the base material, while realizing physical properties (viscosity, etc.) suitable for intaglio ink, and at the same time, it is possible to further improve the glitter characteristics (Glitter). The base material is not particularly limited, and examples thereof include ceramic-based materials including metals such as aluminum, metal oxides such as alumina, and minerals such as glass and mica. As a preferred example, the shiny plate-like particles may be plate-like particles having a metal oxide surface coated on glass, and when it satisfies this, it is possible to maximize the shiny property. However, this is only described as a preferred example, of course, the present invention is not limited to this.

In the ink composition, the ink composition may include 60 to 600 parts by weight of glossy plate-like particles, specifically 100 to 400 parts by weight, based on 100 parts by weight of the wax compound. However, this is only described as a preferred example, of course, the present invention is not limited to this.

In a preferred embodiment, the anti-tampering ink composition for printing intaglio according to an embodiment of the present invention may further include fumed silica nanoparticles. When the fumed silica nanoparticles are included in the ink composition, it has excellent oil absorption properties to realize more suitable physical properties for intaglio printing. In particular, it realizes high light transmittance to further enhance the shiny properties of gloss particles due to minimization of light scattering. You can. The average particle diameter of the fumed silica nanoparticles may be nano-units, and may be, for example, 10 to 300 nm. However, these specific matters are only described as a preferred example, and of course, the present invention is not limited thereto.

When the anti-tampering ink composition for printing intaglio according to an embodiment of the present invention includes the fumed silica nanoparticles, the ink composition is 30 to 300 parts by weight of silica nanoparticles, specifically 50 to 200 parts by weight based on 100 parts by weight of the wax compound. It may include parts by weight. However, this is only described as a preferred example, of course, the present invention is not limited to this.

The anti-tampering ink composition for intaglio printing according to an embodiment of the present invention may include any one or two or more selected from colorants, solvents, surfactants, desiccants, and lubricants to secure properties suitable for intaglio printing.

The colorant may be used as long as it is used in the ink composition for intaglio printing, for example, ester-based polymers, acrylic-styrene copolymers, cellulose acetate propionate-based polymers and vinyl chloride-based polymers, vinyl chloride-vinyl acetate copolymers, urethane-based polymers, acrylic-based Polymers, olefin-based polymers, styrene-based polymers, phenoxy-based polymers, epoxy-based polymers, and modified polymers thereof. Also, it is better to use one or two or more selected from urethane-modified alkyd colorants, epoxy-modified alkyd colorants, polyester-modified alkyd colorants, rosin-modified alkyd colorants, melamine-modified alkyd colorants, amide-modified alkyd colorants and acrylic-modified alkyd colorants. You can. In the ink composition field, colorants are well-known materials that are widely used, and you may refer to these well-known documents.

The content of the colorant used is not particularly limited, and for example, the ink composition may include 200 to 1,000 parts by weight of the colorant, specifically 300 to 800 parts by weight based on 100 parts by weight of the wax compound. However, this is only described as a preferred example, of course, the present invention is not limited to this.

The solvent may be used as long as it is used in the ink composition for intaglio printing, and may include, for example, any one or more selected from water, alkylcarbitol compounds and alkylketone compounds, glycol ether compounds and aliphatic hydrocarbon compounds. Methyl carbitol, ethyl carbitol, etc. may be exemplified as the alkyl carbitol-based compound, and methyl ethyl ketone-based compound may be exemplified as the alkyl ketone-based compound. As the glycol ether-based compound, any one or two or more selected from diethylene glycol monobutyl ether, diethylene glycol monoethyl ether, and diethylene glycol monomethyl ether can be exemplified. Examples of the aliphatic hydrocarbon-based compound include a high-boiling-point aliphatic petroleum-based solvent at 250 to 350 ° C. Solvents in the field of ink compositions correspond to well-known materials widely used, and you may refer to these well-known documents.

The use content of the solvent is not particularly limited, and for example, the ink composition may include 200 to 1,000 parts by weight of solvent, specifically 300 to 800 parts by weight based on 100 parts by weight of the wax compound. However, this is only described as a preferred example, of course, the present invention is not limited to this.

The surfactant may be any one of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, and amphoteric surfactants, and these surfactants correspond to known materials widely used in the field of ink compositions. , You may refer to these well-known documents, and the use content thereof is the same.

The desiccant may be exemplified by manganese, cobalt dryer, and the like, but since it corresponds to a well-known material widely used in the ink composition field, you may refer to these known documents. In addition, its use content is also a part that can be appropriately adjusted, for example, it may be used as 1 to 20 parts by weight based on 100 parts by weight of the wax compound. However, this is only described as a preferred example, of course, the present invention is not limited to this.

The wax compound or the ink composition containing the same may further include an emulsifier to secure suitable properties of the ink composition for intaglio printing. As a specific example, the emulsifier may be any one or two or more selected from stearyl alcohol, cetyl alcohol, setaryl alcohol, lecithin, pectin, stearic acid, borax, citric acid, triethanolamine, polysorbate, solubiliser and lanolin. It can contain. Since the content of the emulsifier used is a part that can be appropriately adjusted to an extent that emulsification can be performed well, a known document may be referred to, or a person skilled in the art may appropriately control it.

The wax compound or the ink composition containing the same may include any one or two or more selected from fungicides, antibacterial agents, fragrances, and the like in order to further improve weatherability or other functions.

The anti-tampering ink composition for printing intaglio according to the present invention may have a viscosity of 5 to 12 Pa.s (20 ° C), and a tackiness of 80 to 130.

The anti-tampering ink composition for intaglio printing according to the present invention may be a water-based ink composition.

The present invention can provide a printing medium intaglio printing with the anti-tampering ink composition for printing intaglio.

Hereinafter, the present invention will be described in detail through examples, but these are for explaining the present invention in more detail, and the scope of the present invention is not limited by the following examples.

[Production Example 1]

Alumina particle aqueous dispersion was prepared by adding 5 kg of alumina particles (Dispal 25SR, SASOL) having a sulfonate group to the surface of 66.85 kg of deionized water and stirring to uniformly disperse for 20 minutes. 2 kg of polydimethylsiloxane (BYK-SILCLEAN 3720, BYK) having a hydroxy function and 20 kg of cationic carnauba wax emulsion (EMULSION C-340, Tomah) were added to the alumina particle aqueous dispersion and stirred for 15 minutes. , 6 kg of nonionic emulsion (TEGO Polish Additive Q70, EVONIK) containing silicone quartz (polysiloxane having a quaternary ammonium group) at a viscosity of 300 mPas (20 ° C), density of 0.96 g / cm ³ and 70% by weight And stirred for 10 minutes. Subsequently, 0.05 kg of iriodin flash gold and 0.1 kg of Almond F-127400 were further mixed and stirred, followed by standing for 20 days to prepare a wax mixture having an appropriate viscosity and formulation.

After mixing 30 kg of Licowax O flakes (CLARIANT), 32 kg of paraffin wax (411663, SIGMA-ALDRICH) and 8 kg of a petroleum-based solvent (YK-D80, SKchem), heating to 110 ° C, and then slowly sludge with stirring. Cool until state. A wax compound was prepared by mixing and stirring 30 kg of the wax mixture in the cooled stirring material until the sludge.

[Production Example 2]

30 kg of montan wax (M81, DEUREX), 32 kg of paraffin wax (411663, SIGMA-ALDRICH) and 8 kg of petroleum-based solvent (YK-D80, SKchem) were mixed and heated to 110 ° C, and the sludge state was slowly stirred. Cool until 38 kg of the wax mixture of Preparation Example 1 was mixed with the stirred material cooled to the sludge state, and stirred to prepare a wax compound.

[Production Example 3]

In Preparation Example 2, a wax compound was prepared in the same manner as in Production Example 2, except that Montan wax (M82, DEUREX) was used instead of Montan wax (M81, DEUREX).

[Production Example 4]

To 66.75 kg of deionized water, 5 kg of alumina particles (Dispal 25SR, SASOL) having a sulfonate group were added to the surface and stirred to uniformly disperse for 20 minutes to prepare an aqueous dispersion of alumina particles. 1 kg of polydimethylsiloxane (DOW CORNING 536 Fluid, DOW CORNING) having an aminomethoxy functional group and 20 kg of cationic carnauba wax emulsion (EMULSION C-340, Tomah) were added to the alumina particle aqueous dispersion and stirred for 15 minutes. After that, 6 kg of nonionic emulsion (TEGO Polish Additive Q70, EVONIK) containing 300 mPas (20 ° C), a density of 0.96 g / cm ³ and 70% by weight of silicon quartz (polysiloxane having a quaternary ammonium group) Was added and stirred for 10 minutes. Subsequently, 0.15 kg of Dantogard and 0.1 kg of Black Cherry Ra-136730 were further mixed and stirred, and then allowed to stand for 20 days to prepare a wax mixture having an appropriate viscosity and formulation.

After mixing 30 kg of Licowax O flakes (CLARIANT), 32 kg of paraffin wax (411663, SIGMA-ALDRICH) and 8 kg of a petroleum-based solvent (YK-D80, SKchem), heating to 110 ° C, and then slowly sludge with stirring. Cool until state. A wax compound was prepared by mixing and stirring 30 kg of the wax mixture in the cooled stirring material until the sludge.

[Production Example 5]

30 kg of montan wax (M81, DEUREX), 32 kg of paraffin wax (411663, SIGMA-ALDRICH) and 8 kg of petroleum-based solvent (YK-D80, SKchem) were mixed and heated to 110 ° C, and the sludge state was slowly stirred. Cool until 38 kg of the wax mixture of Preparation Example 4 was mixed with the stirred material cooled to the sludge state, and stirred to prepare a wax compound.

[Production Example 6]

In Preparation Example 5, a wax compound was prepared in the same manner as in Preparation Example 2, except that Montan Wax (M82, DEUREX) was used instead of Montan Wax (M81, DEUREX).

[Production Example 7]

In Preparation Example 4, a wax compound was prepared in the same manner as in Preparation Example 4, except that a polydimethylsiloxane having an aminomethoxy functional group was not used.

[Production Example 8]

A wax compound was prepared in the same manner as in Preparation Example 1, except that the polydimethylsiloxane having a hydroxy functional group was not used in Preparation Example 1.

[Production Example 9]

A wax compound was prepared in the same manner as in Preparation Example 4, except that the silicone quartz-containing emulsion was not used in Preparation Example 1.

10 kg of wax compound prepared in Production Example 7, 40 kg of POLYURETHANE VARNISH, Dulux TRADE, 20 kg of plate-like particles coated with aluminum oxide on the surface of the glass base material (average long axis: 40 μm), ethyl carbitol 3.5 as solvent An ink composition was prepared by mixing and stirring kg and 3.5 kg of emulsifier, cetostearyl alcohol.

In Example 1, an ink composition was prepared in the same manner as in Example 1, except that the wax compound prepared in Preparation Example 8 was used instead of the wax compound prepared in Preparation Example 7.

In Example 1, an ink composition was prepared in the same manner as in Example 1, except that the wax compound prepared in Preparation Example 9 was used instead of the wax compound prepared in Preparation Example 7.

In Example 1, an ink composition was prepared in the same manner as in Example 1, except that the wax compound prepared in Preparation Example 1 was used instead of the wax compound prepared in Preparation Example 7.

In Example 4, an ink composition was prepared in the same manner as in Example 4, except that 10 kg of fumed silica nanoparticles were further mixed.

As a result, the ink composition had a viscosity of about 9 Pa.s (20 ° C) and a tackiness of about 100.

[Comparative Example 1]

In Example 1, an ink composition was prepared in the same manner as in Example 1, except that Licowax O flakes (CLARIANT) was used instead of the wax compound.

[Comparative Example 2]

In Example 1, an ink composition was prepared in the same manner as in Example 1, except that paraffin wax (411663, SIGMA-ALDRICH) was used instead of the wax compound.

Flop index evaluation

Flop index was evaluated by measuring changes in reflectivity / brightness of the surface according to the viewing angles of the ink compositions prepared in Examples 1 to 6 and Comparative Examples 1 and 2. Specifically, after applying the ink composition to the metal intaglio and immediately printing the intaglio on printing paper, drying at 70 ° C. for 1 hour and drying at room temperature for 24 hours to prepare a specimen in which the ink composition is printed on paper. Then, the prepared specimen was measured for the Flop index using a color spectrophotometer, and the results are shown in Table 1 below.

Comparative example Example One 2 One 2 3 4 5 Flop index 2.98 2.91 3.11 3.13 3.02 3.28 3.47

As shown in Table 1, in the case of Comparative Example 1 and Comparative Example 2 in which a common wax was used instead of the wax compound, the Flop index value was significantly lower than that of Examples 1 and 2 in which the wax compound was used, resulting in metallic properties. It can be confirmed that there is a problem in that the glitter characteristics are not properly expressed and the three-dimensionality is also poor.

In addition, in the case of Example 4 in which a wax compound further containing a siloxane-based polymer was used, it was confirmed that the Flop index value and sterility were more improved compared to those in Examples 1 and 2 in which the siloxane-based polymer was not used. You can.

In addition, in the case of Example 3 in which silicon quartz was not used, it can be confirmed that the Flop index and the three-dimensionality were lowered compared to Examples 1 and 2 in which silicon quartz was used.

Further, in the case of Example 5, in which fumed silica nanoparticles were further used, it can be confirmed that the Flop index value and the sterility increased more than those of Examples 1 to 4.

Claims (13)

A wax compound comprising anionic surface-modified base material particles and a cationic aqueous wax emulsion; And
Shiny plate-like particles;
Anti-counterfeiting ink composition for printing intaglio containing. According to claim 1,
The wax compound is a forgery prevention ink composition for gravure printing further comprising a silicone quartz. According to claim 2,
The silicone quartz has a viscosity of 150 to 500 mPas (20 ℃) and a density of 0.8 to 1.2 g / cm ³ quaternary ammonium group having a quaternary ammonium group for preventing tamper-proof ink composition for printing. According to claim 2,
The wax compound is an anti-counterfeiting ink composition for intaglio printing further comprising a siloxane-based polymer having a hydroxy or amine group. According to claim 1,
The wax compound is one or two or more selected from olefin wax, paraffin wax, rico wax, monta wax, candelilla wax, emulsifying wax, olive wax, jaepen wax, micro crystallin wax, and modified waxes thereof. An anti-tampering ink composition for printing intaglio, further comprising a wax component. According to claim 1,
The anionic surface-modified base material particles are metal oxide particles having sulfonate groups on the surface. According to claim 1,
The wax compound is an anionic surface-modified base material particles 0.5 to 20% by weight, a cationic aqueous wax emulsion 5 to 30% by weight, and the remaining amount of water for gravure printing forged ink prevention composition. According to claim 4,
The wax compound is 0.5 to 20% by weight of anionic surface-modified base material particles, 5 to 30% by weight of a cationic aqueous wax emulsion, 1 to 20% by weight of silicone quartz, and 0.1 to 5% by weight of a siloxane-based polymer having a hydroxy or amine group. % Anti-counterfeiting ink composition for intaglio printing comprising% and residual water. According to claim 1,
The glossy plate-like particles include metal plate-like particles; And plate-like particles coated with a metal oxide on the surface of the base material. An anti-tampering ink composition for printing intaglio containing any one or more selected from among. According to claim 1,
An anti-tampering ink composition for printing intaglio, further comprising fumed silica nanoparticles. The method of claim 10,
An anti-tampering ink composition for gravure printing, comprising 60 to 600 parts by weight of glossy plate-like particles and 30 to 300 parts by weight of the fumed silica nanoparticles based on 100 parts by weight of the wax compound. According to claim 1,
An anti-tampering ink composition for intaglio printing, including any one or two or more selected from colorants, solvents, surfactants, desiccants, and lubricants. A printing medium intaglio-printed with a forgery-prevention ink composition for printing intaglio of any one of claims 1 to 12.