KR20110064367A - Photosensitive ink composition - Google Patents

Abstract

The present invention provides a photosensitive capsule in which a compound expressing color in response to ultraviolet rays is encapsulated, a solvent that does not chemically react with the photosensitive capsule, a binder serving as an adhesive to facilitate adhesion to a printed object, and photosensitive capsule particles. A photosensitive ink composition comprising a dispersant for separating and dispersing evenly in the solvent, an antisettling agent for inhibiting sedimentation of the photosensitive capsule particles, an antifoaming agent for suppressing bubble generation, and a slip agent for reducing a coefficient of friction will be. According to the present invention, the photosensitive capsule is uniformly dispersed in the ink composition and is very stable. When the photosensitive ink composition is printed on a printing object, the photosensitive capsule reacts according to the difference in the ultraviolet wavelength band to express color.

Ink, photosensitive capsule, ultraviolet ray, binder, dispersant, antisettling agent, antifoaming agent, slip agent

Description

Photosensitive ink composition

The present invention relates to an ink composition, and more particularly to a photosensitive ink composition that expresses color in response to ultraviolet light.

Photochromic agents are materials that cause color change by absorbing light. Until recently, many studies on photochromic agents and their phenomena have been made.

Compounds exhibiting photochromic phenomena include tungsten compounds, organic compounds such as silver halides that are widely used as photosensitizers, spiropyran, spiroxazine, azo compounds, and diarylethenes. It is reported that such inorganic compounds are present.

Various organic photochromic agents, including spiro compounds, are not only stable in themselves, but also have low solubility in water due to their large molecular size compared to other organic compounds. It is also difficult to disperse. In particular, the spiro compound is difficult to synthesize, and it is difficult to obtain a high purity compound, and also has a disadvantage that the price is expensive. However, the spiro compound has the advantage that the photosensitivity is very fast, the photochromic effect is very large.

Therefore, studies have been actively made to stabilize the spiro compounds and use them as photochromic agents by encapsulating them for improving light resistance.

US Patent No. 5,017,225 discloses microencapsulated photochromic materials and methods for their preparation.

In addition, Korean Patent No. 0127771 discloses a method for preparing a capsule photochromic composition.

However, the photochromic agents disclosed in U.S. Patent No. 5,017,225 and Korean Patent No. 0127771 have a problem that they are entangled with each other and are difficult to transfer to a coating object. In addition, it is difficult to properly disperse the photochromic agent in an aqueous or oily ink, and even if the photochromic agent is added to the ink composition, it is difficult to control because it has a large molecular weight, and it is difficult to control it. There is a difficulty, and after printing, the printed object preferably has an even surface, but it is difficult to obtain an even surface because the photochromic agents are agglomerated with one another.

The technical problem to be achieved by the present invention is that the photosensitive capsule is uniformly dispersed in the ink composition, very stable, can suppress the settling of the photosensitive capsule, easy to transfer to the print object, obtain an even surface after printing, and reacts to ultraviolet rays By providing a photosensitive ink composition that expresses the color.

In the ink composition which expresses color in response to ultraviolet rays, the present invention relates to 20 to 40% by weight of a photosensitive capsule in which a compound expressing color in response to ultraviolet light is encapsulated, and an aqueous solvent 10 to 10 that does not chemically react with the photosensitive capsule. 30 to 30% by weight, 40 to 70% by weight of a binder serving as an adhesive to easily adhere to a printing object, 0.1 to 3% by weight of a dispersant for separating the photosensitive capsule particles from each other and evenly dispersed in the aqueous solvent, and the photosensitive capsule 0.1 to 3% by weight of an antisettling agent for inhibiting sedimentation of particles, 0.01 to 3% by weight of antifoaming agent for suppressing bubble generation, and 0.1 to 3% by weight of slip agent for reducing the coefficient of friction of the ink composition, wherein It provides a photosensitive ink composition having a maximum particle size of the ink composition is 5 to 20㎛, the viscosity of the ink composition has a range of 100 to 1000 cps.

In addition, the present invention, in the ink composition to express the color in response to the ultraviolet light, 20 to 40% by weight of the photosensitive capsule in which the compound expressing the color in response to the ultraviolet light and the oil-based solvent that does not chemically react with the photosensitive capsule 30 to 60% by weight, 10 to 20% by weight of a binder acting as an adhesive to easily adhere to a printing object, and 0.1 to 3% by weight of a dispersant for separating the photosensitive capsule particles from each other and dispersing the oil solvent evenly. 0.1 to 3% by weight of an antisettling agent for inhibiting sedimentation of the photosensitive capsule particles, 0.01 to 3% by weight of an antifoaming agent for suppressing bubble generation, and 0.1 to 3% by weight of a slipping agent for reducing the coefficient of friction of the ink composition; The maximum particle size of the ink composition is 5 to 20 μm, and the viscosity of the ink composition provides a photosensitive ink composition having a range of 500 to 3000 cps.

The aqueous solvent is water, and the binder may be an acrylic emulsion or a urethane emulsion.

The acrylic emulsion is methyl methacrylate (Methylmethacrylate), methyl acrylate (Methylacrylate), ethyl acrylate (Ethylacrylate), normal butyl acrylate (n-Butylacrylate), normal butyl methacrylate (n-Butylmethacrylate), ethyl meth Ethylmethacrylate, isobutyl methacrylate, isocrymethic acid, methacrylic acid, isopropyl methacrylate, isopropylpropacrylate, 2-ethylhexyl acrylate, 1,6 Hexanediol diacrylate (1,6-Hexanedioldiacrylate), 2-hydroxyethyl methacrylate (2-Hydroxyethylmethacrylate) and 2-hydroxyethyl acrylate (2-Hydroxyethylacrylate) containing at least one monomer It may be composed of mullion.

The urethane-based emulsion may include a urethane-based polymer obtained by the reaction of a diisocyanate component and a diol component.

The oil solvent is toluene or xylene, which is an aromatic solvent, and the binder is acrylic, polyvinyl, polyurethane, polyamide, ethylene It may be a vinyl acetate (EVA) -based, polyester (polyester) -based or chlorinated polypropylene (Chlorinated Polypropylene) -based binder.

The dispersant may be composed of a copolymer solution having a pigment affinity group.

The anti-settling agent may be made of silica.

The antifoaming agent may be made of a polysiloxane antifoaming agent.

The slip agent may be made of a polyethylene-based, polyamide-based, polypropylene-based or fluorine-based slip agent.

According to the photosensitive ink composition and the manufacturing method thereof according to the present invention, the photosensitive capsule is uniformly dispersed in the ink composition and is very stable.

In addition, the phenomenon in which the photosensitive capsules are entangled with each other can be suppressed, and the phenomenon of settling in the ink composition can also be suppressed.

In addition, transfer to the printing object is easy, and the printed object can be obtained with an even surface after printing.

Although the photosensitive capsule has a large molecular weight, the photosensitive oil ink composition may be printed on a printing object such as paper or film using various printing techniques such as a gravure method, a flexo method, and a screen method. Can be.

In addition, when the photosensitive ink composition containing the photosensitive capsule is printed on an object to be printed, the photosensitive capsule reacts according to the difference in the ultraviolet wavelength band, and thus it is possible to predict the degree of ultraviolet rays using the photosensitive capsule.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen.

Ultraviolet rays are absorbed by the photosensitive capsules contained in the photosensitive ink to develop colors. Photosensitive capsules are encapsulated compounds that express color in response to ultraviolet light. The color is expressed according to the amount of ultraviolet light absorbed.

Ultraviolet rays are a kind of sunlight, which means sunlight existing outside the violet wavelength, which is the shortest wavelength in the visible light (wavelength of 400 to 800 nm) region, the region is usually about 200 to 400 nm. Ultraviolet A (Ultra Violet-A) has a wavelength of 320 to 400 nm, ultraviolet B (UV-B) has a wavelength of 290 to 320 nm, and ultraviolet C (UV-C) is 200 to 290 Has a wavelength of nm.

The photosensitive ink absorbs ultraviolet rays in a specific area, thereby changing its molecular structure, thereby causing visible light to develop. Coloration of the photosensitive ink indicates the presence of ultraviolet light in a specific area, and the higher the amount of ultraviolet light, the closer the absorption amount is to a maximum, thereby producing a vivid color.

For example, when the photosensitive ink develops blue and red, red color is developed in the ultraviolet A region, and blue color is developed in the ultraviolet B region having a shorter wavelength than red. As described above, since blue and red colors have different wavelength bands, it is possible to predict the degree of ultraviolet rays by using the same. In the case where the color of the blue color by the photosensitive ink is strong, it means that there is a stronger ultraviolet light than the color of the red color.

<Photosensitive capsule>

Photosensitive capsules can be obtained through the following process.

As the compound causing the photochromic phenomenon, spiro-based compounds such as spiropyran and spiroxazine may be used. These spiro compounds are not only low in stability, but also have a disadvantage in that they are hardly soluble in water and difficult to disperse in water due to their large solubility in water compared to other organic compounds. It is very quick to respond, so the photochromic effect is very large.

Spiro compounds have the following structural formula.

In the above structural formula, R1 is alkoxy, halogen atom or trifluoromethyl such as hydrogen, methoxy or ethoxy group, R2 is hydrogen or alkyl group such as methyl or ethyl group, R3 is hydrogen, dimethylamine or diethylamine etc. Is an amine, piperidine or molpholine, R 4 is hydrogen, an alkoxy or halogen atom such as methoxy or ethoxy, X is carbon (spiropyrane) or nitrogen (spirooxazine), and Y is Oxygen or sulfur, A is an aromatic ring compound such as benzene or naphthalene, and B is an aromatic ring compound or heterocyclic compound such as benzene or naphthalene, and the like.

In order to obtain a photosensitive capsule, a spiro-based solution is prepared by first dissolving a spiro-based compound such as Spiropyran and Spirooxazine in an oil with an additive. Heat the vessel containing water and add gelatin (or melamine) to the vessel containing water to prepare a dissolved gelatin (or melamine) solution.

While stirring the gelatin (or melamine) solution using a stirrer, the spiro-based solution is added dropwise to form an emulsion, while continuing stirring to add a coating resin to the stirrer to coat the emulsified particles with a coating resin. The photosensitive capsule obtained by coating with a resin for coating is very stable and can be used in various types of paints, inks or pigments. The photosensitive capsule has chemical resistance, chemical resistance and the like and has high chemical stability.

The photosensitive capsule has been described with reference to a spiro-based compound causing a photochromic phenomenon, it may be made of a photosensitive capsule containing a variety of compounds that cause a photochromic phenomenon in addition to the spiro-based compound. Such a photosensitive capsule may be included in an aqueous ink composition or an oily ink composition to implement a photosensitive ink composition that expresses color in response to ultraviolet rays.

<Photosensitive aqueous ink composition>

Hereinafter, a photosensitive aqueous ink composition according to a preferred embodiment of the present invention will be described.

Water and emulsion, which are aqueous solvents, are added to the stirrer and stirred. It is preferable that the stirring speed of a stirrer is about 800-1500 rpm.

It is preferable to add 10-30 weight% of said water with respect to the total amount of the photosensitive ink composition in consideration of the viscosity of the photosensitive ink composition, the degree of color development with respect to the ultraviolet-ray after printing, etc.

The emulsion serves as an adhesive to allow the photosensitive ink composition and the photosensitive capsule contained therein to adhere to a printing object such as paper or film. As the emulsion, an acrylic emulsion (emulsion) or a urethane (urethane) emulsion may be used. The acrylic emulsion or urethane emulsion is preferably added in an amount of 40 to 70 wt% based on the total amount of the photosensitive ink composition in consideration of the viscosity of the photosensitive ink composition.

The acrylic emulsion is methyl methacrylate (Methylmethacrylate), methyl acrylate (Methylacrylate), ethyl acrylate (Ethylacrylate), normal butyl acrylate (n-Butylacrylate), normal butyl methacrylate (n-Butylmethacrylate), ethyl meth Ethylmethacrylate, isobutyl methacrylate, isocrymethic acid, methacrylic acid, isopropyl methacrylate, isopropylpropacrylate, 2-ethylhexyl acrylate, 1,6 -At least one monomer of hexanediol diacrylate (1,6-Hexanedioldiacrylate), 2-hydroxyethyl methacrylate (2-Hydroxyethylmethacrylate) and 2-hydroxyethyl acrylate (2-Hydroxyethylacrylate) It may be a solution in which water is mixed with an acryl-based compound. It is preferable that the said acrylic emulsion contains 30-50 weight% of acrylic compounds, and contains 50-70 weight% of water.

The urethane-based emulsion may include a urethane-based polymer obtained by the reaction of the diisocyanate component and the diol component. The diisocyanate component is phenylene diisocyanate, tolylene diisocyanate, diphenylditan-4,4'-diisocyanate, xylylene diisocyanate, isophorone diisocyanate, 1,6-hexamethylene diisocyanate, lysine diisocyanate And the like. The diol component may be polyester diol, polyether diol, polycarbonate diol, or the like. It is preferable that the said urethane type emulsion contains 30-50 weight% of urethane polymers, and contains 50 to 70 weight% of water.

While stirring the stirrer, a copolymer solution dispersant having a pigment affinity group was added thereto. The dispersant may be, for example, a polyacrylate block copolymer solution having carboxylic acid as the pigment affinity group. The dispersant separates the photosensitive capsule particles and serves to suppress agglomeration. It is preferable to add 0.1 to 3 weight% of said dispersing agent with respect to the total amount of the photosensitive ink composition.

The photosensitive capsule is added while stirring the stirrer. It is preferable to add 20-40 weight% of the said photosensitive capsule with respect to the total amount of the photosensitive ink composition. If the amount of the photosensitive capsule is too small, the degree of visual perception of color change is weak, and the photochromic effect may be reduced. If the amount of the photosensitive capsule is too large, the printing defects such as ink may not be printed well. May occur.

While stirring the stirrer, additives such as a sedimentation inhibitor, an antifoaming agent, and a slipping agent are added.

The antisettling agent is added to suppress the phenomenon that the particles constituting the photosensitive ink composition is settled. The anti-settling agent may be used inorganic materials such as silica, alumina, kaolinite, bentonite, dolomite, vialite (BaSO ₄ ), calcium carbonate (CaCO ₃ ), talc, titania, diatomaceous earth, and the like. Since reactivity to light is required, it is preferable to use a transparent silicon-based anti-settling agent such as silica. It is preferable to add 0.1 to 3 weight% of said anti-settling agent with respect to the total amount of the photosensitive ink composition.

The antifoaming agent may generate bubbles at the time of dispersion or printing, and is added to suppress the generation of bubbles or to suppress the occurrence of pinholes during printing due to the bubbles. The antifoaming agent may be a polysiloxane antifoaming agent. It is preferable to add 0.01 to 3 weight% of said antifoamers with respect to the total amount of the photosensitive ink composition.

The slip agent is added to prevent gelation of the photosensitive ink composition and to reduce the coefficient of friction so that ink does not come out by friction after printing. The slip agent may be a polyethylene, polyamide, or fluorine slip agent. It is preferable that the said slip agent is added 0.1 to 3 weight% with respect to the total amount of the photosensitive ink composition.

The photosensitive ink composition thus obtained has a particle size of about 5 to 20 µm. The photosensitive ink composition has a viscosity of about 100 to 1000 cps (centi poise).

The photosensitive aqueous ink composition may be printed on a printing object such as paper or film using various printing techniques such as a gravure method, a flexo method, and the like. When the photosensitive aqueous ink composition is printed on a print object and the print object receives ultraviolet rays, the photosensitive aqueous ink composition is colored in a color such as blue or red by a colorant included in the photosensitive capsule.

<Photosensitive oil ink composition>

Hereinafter, a photosensitive oil ink composition according to a preferred embodiment of the present invention will be described.

An oily solvent and a binder are added to the stirrer and stirred. It is preferable that the stirring speed of a stirrer is about 800-1500 rpm.

Hydrocarbon-based solvents may be used as the oil-based solvent. The hydrocarbon-based solvents include toluene, xylene, and the like, which are aromatic solvents. When using a ketone solvent such as methyl ethyl ketone (MEK), diacetone alcohol (DAA), etc., it is preferable not to use the photosensitive capsule because it may melt. It is preferable to add 30-60 weight% of the said solvent with respect to the total amount of the photosensitive ink composition in consideration of the viscosity of the photosensitive ink composition, the degree of color development with respect to the ultraviolet-ray after printing, etc.

The binder serves as an adhesive to allow the photosensitive ink composition and the photosensitive capsule contained therein to adhere to a printing object such as paper or film. The binder is acrylic, polyvinyl, ethylene vinyl acetate, EVA, polyester, polyurethane, polyamide, or polypropylene. A binder can be used. The binder is preferably added in an amount of 10 to 20% by weight based on the total amount of the photosensitive ink composition in consideration of the viscosity of the photosensitive ink composition and the like.

The acrylic binder is methyl methacrylate (Methylmethacrylate), methyl acrylate (Methylacrylate), ethyl acrylate (Ethylacrylate), normal butyl acrylate (n-Butylacrylate), normal butyl methacrylate (n-Butylmethacrylate), ethyl methacryl Ethylmethacrylate, isobutylmethacrylate, methacrylic acid, isopropylmethacrylate, isopropylpropacrylate, 2-ethylhexylacrylate, 1,6- At least one monomer of hexanediol diacrylate (1,6-Hexanedioldiacrylate), 2-hydroxyethyl methacrylate (2-Hydroxyethylmethacrylate) and 2-hydroxyethyl acrylate (2-Hydroxyethylacrylate) is included It may be a binder.

The propylene-based binder may be chlorinated polypropylene (CPP).

While stirring the stirrer, a copolymer solution dispersant having a pigment affinity group was added thereto. The dispersant may be, for example, a polyester / polyurethane block copolymer solution having a tertiary amine as a pigment affinity group. The dispersant separates the photosensitive capsule particles and serves to suppress agglomeration. It is preferable to add 0.1 to 3 weight% of said dispersing agent with respect to the total amount of the photosensitive ink composition.

While stirring the stirrer, a photosensitive capsule in a powder state is introduced. It is preferable to add 20-40 weight% of the said photosensitive capsule with respect to the total amount of the photosensitive ink composition. If the amount of the photosensitive capsule is too small, the degree of visual perception of color change is weak, and the photochromic effect may be reduced. If the amount of the photosensitive capsule is too large, the printing defects such as ink may not be printed well. May occur.

While stirring the stirrer, additives such as a sedimentation inhibitor, an antifoaming agent, and a slipping agent are added.

The antisettling agent is added to suppress the phenomenon that the particles constituting the photosensitive ink composition is settled. The anti-settling agent may be used an inorganic material such as silica (Silica), alumina, kaolinite, bentonite, dolomite, Bayerite (BaSO ₄ ), calcium carbonate (CaCO ₃ ), talc, titania, diatomaceous earth, the photosensitive ink composition to light Since reactivity is required, it is preferable to use a transparent silicon-based anti-settling agent such as silica. It is preferable to add 0.1 to 3 weight% of said anti-settling agent with respect to the total amount of the photosensitive ink composition.

The antifoaming agent may generate bubbles at the time of dispersion or printing, and is added to suppress the generation of bubbles or to suppress the occurrence of pinholes during printing due to the bubbles. The antifoaming agent may be a polysiloxane antifoaming agent. It is preferable to add 0.01 to 3 weight% of said antifoamers with respect to the total amount of the photosensitive ink composition.

The slip agent is added to reduce the coefficient of friction of the photosensitive ink composition so that ink does not come out by friction after printing. The slip agent may be a polyethylene or fluorine slip agent. It is preferable that the said slip agent is added 0.1 to 3 weight% with respect to the total amount of the photosensitive ink composition.

A milling process is performed to adjust the particle size of the photosensitive ink composition and to prevent the photosensitive capsules from tangling with each other and to be evenly dispersed in the photosensitive ink composition. The milling process is carried out by pressing the photosensitive ink composition using at least two, preferably three rolls, thereby obtaining the required particle size and dispersion effect.

The photosensitive ink composition thus obtained has a particle size of about 5 to 20 µm. The photosensitive ink composition has a viscosity of about 500 to 3000 cps (centi poise).

The photosensitive oil ink composition may be printed on a printing object such as paper or film using various printing techniques such as a gravure method and a screen method. When the photosensitive oil ink composition is printed on a printing object, and the printing object receives ultraviolet rays, the photosensitive oil ink composition is colored in a color such as blue or red by a colorant (compound causing photochromic phenomenon) included in the photosensitive capsule.

&Lt; Example 1 >

3g of water and 63g of methyl acrylate, which is an acrylic emulsion, are added to the stirrer and stirred. At this time, the stirrer is stirred at a stirring speed of 800 rpm.

At this time, the temperature of the composition is 10 to 35 ℃ range, the stirring time is 5 to 10 minutes are suitable.

The methyl acrylate (Methylacrylate) is a 50% by weight of methyl acrylate, 50% by weight of water is contained.

While stirring the stirrer, 1 g of a polyacrylate block copolymer solution having carboxylic acid as a pigment affinity group was added as a dispersant. 30 g of photosensitive capsules are added while stirring the stirrer. At this time, the stirrer is set at a stirring speed of 1000 to 1300 rpm, and the temperature is set to about 10 to 30 minutes with a stirring time within a range of 10 to 35 ° C.

While stirring the stirrer, 1 g of silica, a polysiloxane antifoaming agent, 1 g of polyethylene anti-slip agent 1 g is added to obtain a photosensitive aqueous ink composition.

<Example 2>

40 g of toluene, 8 g of polyvinyl chloride as a binder, and 8 g of polypropylene were added to the stirrer and stirred. At this time, the stirrer is set at a stirring speed of 1000 to 1300 rpm and stirred for about 10 to 30 minutes until the binder is completely dissolved.

While stirring the stirrer, 1 g of a polyester / polyurethane block copolymer solution having a tertiary amine as a pigment affinity group was added as a dispersant. 40 g of photosensitive capsules are added while stirring the stirrer. At this time, the stirrer is set at a stirring speed of 800 to 1000 rpm and the temperature is stirred in the range of 10 to 35 ° C.

While stirring the stirrer, 1 g of silica, a polysiloxane antifoaming agent, and 1 g of polyethylene slip agent are added.

In order to control the particle size of the photosensitive ink composition made as described above and to prevent the photosensitive capsule from tangling with each other, the photosensitive ink composition is passed through a three roll mill to perform a milling process to perform a desired particle size. A photosensitive oily ink composition having At this time, the temperature of the composition should be milled in the range of 10 to 35 ℃, and the pressure between the roll and the roll should be adjusted so as not to break the capsule particles.

As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various deformation | transformation by a person of ordinary skill in the art within the scope of the technical idea of this invention is carried out. This is possible.

Claims (11)

In the ink composition which expresses color in response to ultraviolet rays, 20 to 40% by weight of the photosensitive capsule in which the compound expressing color in response to ultraviolet light is encapsulated; 10 to 30% by weight of an aqueous solvent that does not chemically react with the photosensitive capsule; 40 to 70% by weight of a binder that serves as an adhesive to facilitate adhesion to a printing object; 0.1 to 3% by weight of a dispersant for separating the photosensitive capsule particles from each other and evenly dispersed in the aqueous solvent; 0.1 to 3% by weight of a sedimentation inhibitor for inhibiting the settling of the photosensitive capsule particles; 0.01 to 3% by weight of antifoaming agent for suppressing bubble generation; And 0.1 to 3% by weight of a slip agent for reducing the coefficient of friction of the ink composition, The maximum particle size of the ink composition is 5 to 20㎛, the viscosity of the ink composition has a photosensitive ink composition having a range of 100 to 1000 cps. In the ink composition which expresses color in response to ultraviolet rays, 20 to 40% by weight of the photosensitive capsule in which the compound expressing color in response to ultraviolet light is encapsulated; 30 to 60% by weight of an oil-based solvent that does not chemically react with the photosensitive capsule; 10 to 20% by weight of the binder to act as an adhesive to easily adhere to the printing object; 0.1 to 3% by weight of a dispersant for separating the photosensitive capsule particles from each other and evenly dispersed in the oil-based solvent; 0.1 to 3% by weight of a sedimentation inhibitor for inhibiting the settling of the photosensitive capsule particles; 0.01 to 3% by weight of antifoaming agent for suppressing bubble generation; And 0.1 to 3% by weight of a slip agent for reducing the coefficient of friction of the ink composition, The maximum particle size of the ink composition is 5 to 20㎛, the viscosity of the ink composition has a photosensitive ink composition having a range of 500 to 3000 cps. The photosensitive ink composition of claim 1, wherein the aqueous solvent is water, and the binder is an acrylic emulsion or a urethane emulsion. The method of claim 3, wherein the acrylic emulsion is methyl methacrylate (Methylmethacrylate), methyl acrylate (Methylacrylate), ethyl acrylate (Ethylacrylate), normal butyl acrylate (n-Butylacrylate), normal butyl methacrylate ( n-Butylmethacrylate, Ethylmethacrylate, isobutylmethacrylate, isobutyl methacrylate, methacrylic acid, isopropylmethacrylate, isopropyl methacrylate, 2-ethylhexyl acrylate At least one of -Ethylhexylacrylate), 1,6-hexanedioldiacrylate, 1,6-Hexanedioldiacrylate, 2-Hydroxyethylmethacrylate and 2-Hydroxyethylacrylate The photosensitive ink composition, characterized in that consisting of an emulsion containing one monomer. 4. The photosensitive ink composition according to claim 3, wherein the urethane emulsion comprises a urethane polymer obtained by reaction of a diisocyanate component with a diol component. According to claim 2, The oil solvent is toluene (Tolune) or xylene (Xylene) which is an aromatic solvent, The binder is acrylic (polycrylic), polyvinyl (Polyvinyl), polyurethane (polyurethane), polyamide (Polyamide) -based, ethylene vinyl acetate (EVA) -based, polyester (Polyester) -based or chlorinated Polypropylene-based binder, characterized in that the photosensitive ink composition. The photosensitive ink composition of claim 1, wherein the dispersant is a polyacrylate block copolymer solution having carboxylic acid as a pigment affinity group. The photosensitive ink composition of claim 2, wherein the dispersant is a polyester / polyurethane block copolymer solution having a tertiary amine as a pigment affinity group. The photosensitive ink composition according to claim 1 or 2, wherein the antisettling agent is made of silica. The photosensitive ink composition according to claim 1 or 2, wherein the antifoaming agent is made of a polysiloxane antifoaming agent. The photosensitive ink composition according to claim 1 or 2, wherein the slip agent comprises a polyethylene-based, polyamide-based, polypropylene-based or fluorine-based slip agent.