KR20130106963A

KR20130106963A - Ink composition including waste ink for printing

Info

Publication number: KR20130106963A
Application number: KR1020120028661A
Authority: KR
Inventors: 문석영; 김재영; 김근형; 박상규
Original assignee: 대한잉크 주식회사
Priority date: 2012-03-21
Filing date: 2012-03-21
Publication date: 2013-10-01

Abstract

An ink composition comprising waste printing ink is disclosed. First, a vehicle composition comprising 20 to 70 wt% of a rosin modified phenol resin, 29 to 79 wt% of dry oil and soybean oil, 0.1 to 2 wt% of a gelling agent, and 0.1 to 5 wt% of a plasticizer is prepared. 30 to 70 wt% of the vehicle composition, 5 to 20 wt% of at least one of dry oil and soybean oil, 5 to 30 wt% of pigment, 5 to 20 wt% of waste printing ink, and 0.5 to 10 wt% of thixotropic agent Manufacture. It is possible to prepare an ink composition including waste printing ink and having excellent physical properties.

Description

Ink composition containing ink for waste printing {Ink Composition Including Waste Ink for Printing}

The present invention relates to an ink composition comprising waste printing ink, and more particularly, to include waste printing ink, and has excellent printing aptitude such as concentration, gloss, emulsification suitability, set drying characteristics, and worker's stability by volatile organic compounds. It relates to an ink composition comprising the ink for waste printing which can be guaranteed.

The generation rate of the waste printing ink is about 1.1% by weight based on the total amount of the composition in the ink composition manufacturing process, and about 1.5% by weight relative to the amount used when printing in the printing shop. The generated waste printing ink is completely discarded after recovery, which causes environmental pollution and economic loss.

When the waste printing ink is reapplied as an ink, it is inevitable that the physical properties are deteriorated with respect to concentration, gloss, emulsification property, set drying, and volatile organic compound (VOC). Therefore, there is a need for the development of a technology capable of recycling waste ink.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle composition which focuses on this need and can exhibit excellent physical properties when applying waste printing inks for printing.

It is another object of the present invention to provide an ink composition comprising waste printing ink but which is prepared using the above-described vehicle composition and exhibits excellent physical properties when applied for printing.

In order to achieve the above object, in the present invention, 20 to 70% by weight of rosin-modified phenolic resin, 29 to 79% by weight of a mixture of dry oil and soybean oil, 0.1 to 2% by weight of a gelling agent and 0.1 to 5% by weight of a plasticizer A vehicle composition is provided.

In one embodiment, the rosin-modified phenolic resin has a weight average molecular weight range of 30,000 to 100,000, a softening point of 160 to 180 ℃ range, acid value of 25 mgKOH / g or less, Gardner viscosity of K ~ O range, Heptane dilution may range from 5-20 and the color number may be 12 or less.

In one embodiment, the rosin-modified phenolic resin comprises a rosin of 20 to 70% by weight, the rosin may be at least one selected from the group consisting of gum rosin, delosin and wood rosin.

In one embodiment, the rosin-modified phenolic resin may be prepared by reacting an intermediate obtained by the esterification reaction of a mixture containing the rosin and petroleum resin with a polyhydric alcohol with a phenol compound and paraformaldehyde.

In one embodiment, the dry oil may be at least one selected from the group consisting of iodine value 130 ~ 220, saponification value 180 ~ 200 range, paulownia oil, amine phosphorus oil, linseed oil and castor oil. In addition, the soybean oil may have an iodine value in the range of 125 to 140 and a saponification value in the range of 180 to 200.

In one embodiment, the gelling agent may be any one of chelated alkoxides and alkoxides.

In one embodiment, the plasticizer is a phthalate, carboxylate, aliphatic diesters, epoxides, fatty acid esters, chlorinated paraffins and poly It may be at least one selected from the group consisting of ester (polyester).

In order to achieve the above object of the present invention, in the present invention, 20 to 70% by weight of rosin-modified phenol resin, 29 to 79% by weight of a mixture of dry oil and soybean oil, 0.1 to 2% by weight of a gelling agent and 0.1 to 5% by weight of a plasticizer are used. 30 to 70% by weight of a vehicle composition comprising; 5-20% by weight of at least one of dry oil and soybean oil; Pigment 5-30 wt%; 5-20% by weight of waste printing ink; And it provides an ink composition comprising 0.5 to 10% by weight thixotropic agent.

In one embodiment, the thixotropic agent is castor oil modifide wax, synthetic micronized silica, organic bentonite, polyamide wax, polyethylene oxide And it may be at least one selected from the group consisting of cationic surfactant (cationic surfactant).

In one embodiment, the cationic surfactant may be any one of quaternary ammonium salts represented by the following <Formula 1> and imidazonium quaternary salts represented by the following <Formula 2> or <Formula 3>.

&Lt; Formula 1 >

In Formula 1, R ₁ and R ₂ are independently one of -CH ₃ and -CH ₂ OH, and R ₃ and R ₄ are independently of each other lauryl and oleyl functional group.

(2)

In Formula 2, Q ′ and Q ″ ′ are alkyl groups consisting of hydrocarbons, Q ″ is any one of C ₁ -C ₄ alkyl and hydroxyalkyl, and Y ⁻ is a compatible anion.

In Formula 3, R ′, R ″, and R ′ ″ are alkyl groups, and Y ⁻ is halogen or monoalkyl sulfate.

In one embodiment, the volatile organic compound content contained in the ink composition may be less than 5% by weight.

The ink composition according to the embodiment of the present invention configured as described above has excellent printability due to good physical properties related to concentration, gloss, emulsification property, set drying, and volatile organic compound content, even when including waste printing ink.

Hereinafter, a vehicle composition according to an embodiment of the present invention, an ink composition including the same, and a method of preparing the same will be described in detail.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are further described in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, an ink composition according to an embodiment of the present invention will be described in detail.

Example of the present invention provides a vehicle composition for an ink composition comprising 20 to 70% by weight of rosin-modified phenolic resin, 29 to 79% by weight of dry oil and soybean oil, 0.1 to 2% by weight of gelling agent and 0.1 to 5% by weight of plasticizer. .

The rosin-modified phenolic resin preferably contains 20 to 70% by weight of rosin. Since the rosin-modified phenolic resin has a solid form, it is dissolved at about 180 ° C. to 200 ° C. by adding dry oil and soybean oil together, gelling with a gelling agent such as aluminum chelate, and then adjusting the viscosity using a plasticizer. To be made and applied to one vehicle composition.

The rosin-modified phenolic resin has a weight average molecular weight in the range of 30,000 to 100,000, a softening point in the range of 160 to 180 ° C, an acid value of 25 mgKOH / g or less, a Gardner viscosity of K to O range, and n-heptane dilution of 5 It is preferable that the range is -20 and the color number is 12 or less.

When the rosin-modified phenolic resin is applied to the vehicle composition comprising the same as the ink composition, if the weight average molecular weight is less than 30,000, the drying of the set is slow, and the thermal stability is low, the viscoelasticity of the ink is weakened when the plate temperature rises, which may cause contamination of the non-active line part. Can be. In addition, when the weight average molecular weight exceeds 100,000, it is difficult to control the viscosity of the ink, which may cause a transfer failure. Therefore, the weight average molecular weight of the rosin-modified phenol resin is preferably about 30,000 to 100,000.

In addition, the rosin-modified phenolic resin has a softening point of less than 160 ℃ may adversely affect the drying and may cause a poor viscosity. In addition, when the softening point exceeds about 180 ℃ there is a disadvantage that the increase in viscosity may occur and the transfer force may drop. Therefore, the softening point of the rosin-modified phenol resin is preferably in the range of 160 ℃ to 180 ℃.

The rosin may be at least one of gum rosin, thalrose and wood rosin. These can be used individually or in mixture.

In addition, the rosin-modified phenolic resin may be prepared by reacting an intermediate obtained by esterification of a mixture including the rosin and petroleum resin with a polyhydric alcohol with a phenol compound and paraformaldehyde.

If this is explained in more detail as follows.

The rosin-modified phenolic resin used in the vehicle composition may be prepared by reacting rosin, petroleum resin, polyhydric alcohol, phenolic compound and paraformaldehyde. Specifically, the rosin-modified phenolic resin is prepared by reacting an intermediate obtained by esterification of a mixture containing a rosin and a petroleum resin with a polyhydric alcohol with a phenol compound and paraformaldehyde, and has a weight average molecular weight of 30,000 to 100,000 and 160 It has a softening point of ℃ to 180 ℃.

The petroleum resin is used to impart functionality, which serves to shorten the set drying time and to improve the emulsification aptitude by increasing the molecular weight and solubility of the rosin modified phenolic resin.

When preparing the rosin-modified phenolic resin, the amount of rosin is preferably in the range of 20 to 70% by weight. If the amount of the rosin is less than 20% by weight, the unreacted alcohol remains in the resin and loses its properties as a vehicle, and the emulsification ability may deteriorate. If the amount of the rosin is more than 70% by weight, the viscosity of the resin is diluted and the vehicle This is because the viscosity of the can be difficult to control.

Rosin-modified phenolic resin prepared as described above is to be used in the 20 to 70% by weight in the vehicle composition. If its amount is less than 20% by weight, it is difficult to serve as a vehicle due to poor viscosity control and poor transferability of the ink to be manufactured thereafter. Because it can occur.

The vehicle composition according to the embodiment of the present invention includes dry oil and soybean oil. The dry oil may have an iodine value in the range of 130 to 220, a saponification value in the range of 180 to 200, and may be at least one selected from the group consisting of paulownia oil, amine oil, linseed oil, and castor oil.

The soybean oil may have an iodine value in the range of 125 to 140 and a saponification value in the range of 180 to 200.

Drying oil and soybean oil may be used in the preparation of the vehicle composition, and these mixtures may be used in the range of 29 to 79% by weight. If the amount of the mixture is less than 29% by weight, the viscosity may be increased and gloss and fluidity may be deteriorated, and if the amount of the mixture is more than 79% by weight, the water resistance is lowered and the viscosity is undesirably undesirable. to be.

The dry oil has a characteristic of excellent polymerization capacity and the soybean oil may take advantage of each component by mixing and using them as components having excellent resin compatibility. The mixing ratio is not particularly limited when mixing the dry oil and soybean oil, but considering the polymerization capacity and resin compatibility, the mixing ratio of the dry oil and soybean oil is preferably in the range of 5:95 to 20:80.

The gelling agent may be any one of chelated alkoxides, alkoxides, and aluminum chelates as a component used to increase molecular weight and adjust physical properties of the vehicle composition. Specific examples thereof include aluminum sec-butoxide (ASB), aluminum di-isopropoxide acetoacetic ester chelate (AIE-M), and oxyaluminum octoate (AOA).

The amount of the gelling agent to be used is in the range of 0.1 to 2% by weight based on the total amount of the vehicle composition. If the amount thereof is less than 0.1% by weight, the elasticity of the ink is poor, and if the amount thereof is more than 2% by weight, the viscosity is poor, which is not preferable.

The plasticizer is a component that acts as a lubricant to help the molecules move between the molecules and the molecules of the resin. It is also used for the purpose of increasing the content of rosin-modified phenolic resins in the manufacture of vehicle compositions comprising rosin-modified phenolic resins.

The plasticizer includes at least one of phthalate, carboxylate, aliphatic diesters, epoxides, fatty acid esters, chlorinated paraffins and polyesters. One can be used. Specifically, dimethyl phthalate (DMP), dibutyl phthalate (DBP), dioctyl phthalate (DOP), diheptyl phthalate (DHP), and the like can be given.

The plasticizer is in the range of 0.1 to 5% by weight based on the total amount of the vehicle composition. This is because, if the amount of the plasticizer is less than 0.1% by weight, it is difficult to obtain an effect as a plasticizer.

An embodiment of the present invention provides an ink composition comprising the above-described vehicle composition and waste printing ink.

Such a composition comprises 30 to 70% by weight of the aforementioned vehicle composition, 5 to 20% by weight of at least one of dry oil and soybean oil, 5 to 20% by weight of waste printing ink, 5 to 30% by weight of pigment and 0.5 to 10% by weight of thixotropic agent. It is done by The ink composition according to the present invention is an ink composition based on soybean oil.

The vehicle composition is as described above, and includes 20 to 70% by weight of rosin-modified phenol resin, 29 to 79% by weight of dry oil and soybean oil, 0.1 to 2% by weight of a gelling agent, and 0.1 to 5% by weight of a plasticizer.

The ink composition comprises the vehicle composition in the range of 30 to 70 wt% based on the total amount of the ink composition. If the amount thereof is less than 30% by weight, the pigment may not be easily dispersed and defects may occur. If the amount thereof is more than 70% by weight, the viscosity may rise to degrade the transferability.

The ink composition according to the embodiment of the present invention includes a pigment. As the pigment which can be applied, various kinds of organic or inorganic pigments used in general oily inks can be used, and inorganic pigments which are insoluble in organic solvents are preferably used, and especially black pigments can be used. Specifically Mr. An example is C.I pigment black. However, various pigments may be selectively used depending on the color, and may be used alone or in combination, as necessary.

The amount of the pigment used should be in the range of 5 to 30% by weight based on the total amount of the ink composition. If the amount of the pigment is less than 5% by weight, the problem of poor printing may be due to problems such as low ink concentration, excessive amount of emulsification, and excessive flow. If the amount thereof exceeds 30% by weight, the print quality may be deteriorated due to problems such as reduced fluidity of the ink, lowered amount of emulsification, and poor ink transfer power. Therefore, the amount of the pigment used is in the range of 5 to 30% by weight based on the total amount of the ink composition.

The ink composition of the present invention may include the waste printing ink in the range of 5 to 20% by weight based on the total amount of the ink composition. The waste printing ink may be added in an amount as large as possible in terms of recycling, but may be within a range of up to 20% by weight in consideration of the physical properties of the finally prepared ink composition and the content of volatile organic compounds. The volatile organic compound content of the ink composition to be prepared is preferably to be less than 5% by weight.

The ink composition of the present invention further comprises a thixotropic agent to compensate for the uneven viscosity and poor emulsification ability by using the waste printing ink.

That is, the thixotropic agent is a component used to impart an increase in viscosity and emulsification stability of the ink. These thixotropic agents include castor oil modifide wax, synthetic micronized silica, organic bentonite, polyamide wax, polyethylene oxide, and cationic surfactants. cationic surfactant).

In order to supplement the characteristics of the waste printing ink, the thixotropic agent should be used in the range of 0.5 to 10 wt% based on the total amount of the ink composition. This is not preferable if the amount thereof is less than 0.5 wt% because the physical properties of the ink composition are not obtained at a satisfactory level. If the amount thereof is more than 10 wt%, the viscosity of the ink increases and an emulsification defect occurs. Because.

In particular, as the cationic surfactant, any one of quaternary ammonium salts represented by the following <Formula 1> and imidazonium quaternary salts represented by the following <Formula 2> or <Formula 3> may be used.

&Lt; Formula 1 >

(2)

As other additives that can be used in the ink composition according to the embodiment of the present invention, additive components conventionally used in general oil-based ink may be used without exception. Specifically, drying inhibitors, antioxidants, waxes and the like can be given.

Hereinafter, specific and preferred embodiments of the present invention will be described in more detail while comparing with comparative examples.

Preparation of Vehicle Composition

&Lt; Example 1 >

A pressurized kettle equipped with a thermometer, a condenser, a stirrer, and a water separator was 43% by weight of rosin-modified phenolic resin (KHI-925, manufactured by Kolon Industries Co., Ltd.) under a nitrogen atmosphere, and rinse oil and soybean oil in a ratio of 10: 90 as dry oil. 49 wt% of the mixture was added thereto, and the temperature was raised to 180 ° C. to 200 ° C., and the mixture was maintained to sufficiently dissolve and mix the resin, the dry oil and the soybean oil mixture. After cooling to 160 ° C. and adding 1.2 wt% of AIE-M as a gelling agent, the mixture was maintained for about 1 hour. A vehicle composition was prepared by adding 5% by weight of linseed oil as a viscosity adjusting dry oil and 1.8% by weight of DBP as a plasticizer.

&Lt; Comparative Example 1 &

The vehicle composition was carried out in the same manner as in Example 1, but using 49% by weight of a mixture of linseed oil and petroleum hydrocarbon solvent (MICSOL 2831, unchanged petroleum oil) in a ratio of 10: 90 instead of linseed oil and soybean oil. Was prepared.

Comparative Example 2

A vehicle composition was prepared in the same manner as in Example 1, but using 1.8 wt% of linseed oil instead of 1.8 wt% of DBP as a plasticizer.

The gloss, emulsifiability, viscosity, and set drying characteristics of the vehicle compositions prepared in Examples 1 and Comparative Examples 1 and 2 were evaluated.

Gloss evaluation was performed by printing 0.1cc of each sample on a 120g art paper using a printing machine applying a four-dividing roller, and then measuring the gloss of the printed matter at a 1 minute interval using a 60 ° gross meter (byK-Gardner). The larger the value was, the better the gloss was evaluated.

Emulsification evaluation was evaluated using a Duke Emulsification tester. In the test method, 100 g of each sample and 100 g of tap water were emulsified for 10 minutes, and the emulsification rate was calculated using the amount of remaining tap water. The larger the emulsification rate was, the lower the emulsion stability was.

The viscosity evaluation used the viscosity measuring method by the falling ball method. In the test method, each sample was placed in a dropping tube, stored in a thermostat at 25 ° C. for 30 minutes, and then evaluated as a time when the falling ball passed the 5 cm dropping tube. Falling viscosity was performed according to the following equation 1.

N = 6.56 x T

In Formula 1, N represents a falling ball viscosity, and T represents a time (seconds) through which a falling ball passes through 5 cm of the falling ball. The appropriate level of the falling ball viscosity evaluated the value of 3000-3500 as good.

The set dryness evaluation evaluated the set dryness by rotating the sample at a interval of 1 minute after printing 0.1cc of a sample using a printing machine applying a four-segment roller to 120g art paper, and the smaller the value, the better the dryness.

Evaluation results for the gloss, emulsifiability, viscosity, and set drying characteristics are summarized in Table 1 below.

TABLE 1

As shown in Table 1, it can be seen that the vehicle composition prepared according to Example 1 exhibits excellent properties in gloss when compared to the vehicle composition of Comparative Example 1 prepared using a petroleum hydrocarbon solvent. It can also be seen that the vehicle composition according to Example 1 exhibits excellent properties in terms of gloss and viscosity when compared with the vehicle composition of Comparative Example 2 prepared without the use of a plasticizer.

Preparation of an ink composition comprising the ink for waste printing

The ink composition was prepared using the vehicle composition prepared in Example 1. 20 wt% of the pigment, 49 wt% of the vehicle composition prepared in Example 1, and 15 wt% of the waste printing ink were added thereto, followed by dispersion with a three-roll mill to prepare an ink base. NEROX 505 (Ebonic Carbon Black Korea Co., Ltd.) was used as the pigment. 0.8 wt% of manganese (Mn) as a drying agent, 1 wt% of hydroquinone (HQ) as an antioxidant, 2 wt% of a wax, and 2 wt% of a quaternary ammonium salt as a thixotropic agent were added to the dispersed ink base. Thereafter, 10.2 wt% of linseed oil was mixed as a dry oil for viscosity control, thereby preparing an ink composition having a final volatile organic compound (VOC) of less than 10%.

&Lt; Comparative Example 3 &

The ink composition was prepared in the same manner as in Example 2, but using the vehicle composition prepared in Comparative Example 1. 20 wt% of the pigment and 66 wt% of the vehicle composition prepared in Comparative Example 1 were added thereto, followed by dispersion with a three roll mill to prepare an ink base. NEROX 505 (Ebonic Carbon Black Korea Co., Ltd.) was used as the pigment. 0.8% by weight of manganese (Mn) as a drying agent, 1% by weight of hydroquinone (HQ) as an antioxidant, and 2% by weight of wax were added to the dispersed ink base. Thereafter, 10.2 wt% of MICSOL 2831 (manufactured by unchanged petroleum oil) was mixed as a petroleum hydrocarbon solvent to finally adjust the viscosity to prepare an ink composition.

&Lt; Comparative Example 4 &

The ink composition was prepared in the same manner as in Example 2, but using the vehicle composition prepared in Comparative Example 1. 20 wt% of the pigment, 49 wt% of the vehicle composition prepared in Comparative Example 1, and 15 wt% of the waste printing ink were added thereto, followed by dispersion with a three roll mill to prepare an ink base. NEROX 505 (Ebonic Carbon Black Korea Co., Ltd.) was used as the pigment. 0.8 wt% of manganese (Mn) as a drying agent, 1 wt% of hydroquinone (HQ) as an antioxidant, 2 wt% of a wax, and 2 wt% of a quaternary ammonium salt as a thixotropic agent were added to the dispersed ink base. Thereafter, 10.2 wt% of MICSOL 2831 (manufactured by unchanged petroleum oil) was mixed as a petroleum hydrocarbon solvent for viscosity control to prepare an ink composition.

&Lt; Comparative Example 5 &

In the same manner as in Example 2, an ink composition was prepared without using the waste printing ink and the thixotropic agent. As a pigment, NEROX 505 (Ebonic Carbon Black Korea Co., Ltd.) was used, and 20 wt% of the pigment and 66 wt% of the vehicle prepared in Example 1 were added thereto, followed by dispersion with a three roll mill, followed by an ink base. Was prepared. 0.8% by weight of manganese (Mn) as a drying agent, 1% by weight of hydroquinone (HQ) as an antioxidant, and 2% by weight of wax were added to the dispersed ink base. Thereafter, 10.2 wt% of linseed oil was mixed as a dry oil to prepare an ink composition for viscosity control.

The ink composition samples prepared in Example 2 and Comparative Examples 3 to 5 described above were measured and evaluated for concentration, gloss, set drying, emulsifiability, and volatile organic solvent amount.

The density was evaluated by printing 0.1cc of each sample on a 120g art paper using a printing machine applying a four-segment roller, and then measuring the density of the printed matter using a color difference meter (Spectro Eye, manufactured by X-rite) using a D50 light source. The larger the value, the better the concentration.

The amount of volatile organic solvent was evaluated by putting 2 g of each sample on a glass plate, drying for 1 hour in a thermostat at 100 degrees, and measuring the volatile matter (%). The smaller the value, the lower the volatile organic solvent content.

For gloss, set drying, emulsification, etc., the method applied when evaluating the characteristics of the vehicle composition was used.

In the above, the evaluation result for each characteristic is shown in Table 2 below.

As shown in Table 2, it can be seen that the ink composition according to Example 2 shows good results in all properties including glossiness and can significantly lower the volatile content of the volatile organic solvent. It can be confirmed that even when compared with the ink composition of Comparative Example 5 prepared without using the waste printing ink and the petroleum hydrocarbon organic solvent, it exhibits almost the same physical properties.

As described above, the ink composition based on soybean oil including the waste printing ink according to the present invention can maintain the volatile organic compound (VOC) at less than 5% even when the waste printing ink is included, and the concentration, gloss, emulsification property, set Good results can be obtained in printability tests such as drying.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

Claims

A vehicle composition for an ink composition comprising 20 to 70% by weight of a rosin-modified phenol resin, 29 to 79% by weight of dry oil and soybean oil, 0.1 to 2% by weight of a gelling agent, and 0.1 to 5% by weight of a plasticizer.

The method of claim 1, wherein the plasticizer is a phthalate, carboxylate, aliphatic diesters, epoxides, fatty acid esters, chlorinated paraffins and poly Vehicle composition, characterized in that at least one selected from the group consisting of polyester.

30 to 70 wt% of a vehicle composition comprising 20 to 70 wt% of a rosin-modified phenolic resin, 29 to 79 wt% of dry oil and soybean oil, 0.1 to 2 wt% of a gelling agent, and 0.1 to 5 wt% of a plasticizer;
5-20% by weight of at least one of dry oil and soybean oil;
Pigment 5-30 wt%;
5-20% by weight of waste printing ink; And
Ink composition comprising 0.5 to 10% by weight thixotropic agent.

4. The thixotropic agent of claim 3, wherein the thixotropic agent is castor oil modifide wax, synthetic micronized silica, organic bentonite, polyamide wax, or polyethylene oxide. And at least one selected from the group consisting of cationic surfactant (cationic surfactant) ink composition.

The method of claim 4, wherein the cationic surfactant is characterized in that any one of the quaternary ammonium salt represented by the following <formula 1> and the imidazonium quaternary salt represented by the following <formula 2> or <formula 3> Ink composition.
&Lt; Formula 1 >

(In Formula 1, R ₁ and R ₂ are independently of each other any one of -CH ₃ and -CH ₂ OH, R ₃ and R ₄ are independently of each other any of lauryl and oleyl functional group)
(2)

(Q 'and Q "' in the formula (2) is an alkyl group consisting of a hydrocarbon, Q" is any one of C ₁ -C ₄ alkyl and hydroxyalkyl, Y ^- is a compatible anion)
(3)

(In Formula 3, R ', R''andR''' are alkyl groups, and Y ^- is halogen or monoalkyl sulfate.)