JP6255123B1 - Liquid ink composition - Google Patents

Abstract

An object of the present invention is to provide a liquid ink composition for gravure inks and flexographic inks which is excellent in friction resistance, oil resistance, heat resistance, and printability. In addition, it is to provide a printed matter using the ink composition.
The solution of the present invention includes a liquid comprising a thermoplastic polyamide resin (A) using a rice bran fatty acid as a reaction raw material, a fibrous resin (B), and an organic solvent (C). The present invention relates to an ink composition.
[Selection figure] None

Description

  The present invention relates to a liquid ink composition mainly used for surface printing of soft packaging materials, and can be used for either gravure or flexographic printing, and additionally uses the liquid ink. It relates to printed matter.

  A liquid resin composition used mainly for surface printing of a soft packaging material by a gravure printing method or a flexographic printing method uses a polyamide resin as a main component. In recent years, the use of aromatic solvents such as toluene and ketone solvents such as methyl ethyl ketone is being restricted in terms of both work hygiene during printing and the harmfulness of packaging materials. Along with this, from the viewpoint of printability, toluene-free liquid inks are aromatic as solvents, instead of ketone solvents, acetates such as ethyl acetate and propyl acetate, alcohols such as isopropyl alcohol and normal propyl alcohol. There is a tendency to use a solvent, a non-aromatic hydrocarbon solvent such as methylcyclohexane or a mixed solvent thereof.

However, when non-aromatic solvents are used, the friction resistance, oil resistance, heat resistance and printability required for surface printing inks are inferior to conventional toluene-based inks. It has become.
On the other hand, liquid inks using a mixed resin system of nitrified cotton / polyamide resin, or nitrified cotton / urethane resin, and inks using a thermoplastic polyamide resin in which the polyamide resin reacts with dimer acid and diamine are disclosed. Vegetable fatty acids such as tall oil fatty acids or synthetic oil fatty acids are used as reaction raw materials for dimer acids (for example, Patent Documents 1 and 2).
However, although various vegetable fatty acids are described as reaction raw materials for the dimer acid, there is no description of the superiority of using rice bran fatty acid. The liquid ink composition of the present invention realizes an ink composition having sufficient friction resistance, oil resistance, heat resistance, and printability even in a non-toluene solvent composition. Utilization of fatty acids as raw materials is desired from the viewpoint of saving carbon offset and fossil resources.

JP 2006-029122 A JP 2005-171167 A

  An object of the present invention is to provide a liquid ink composition for gravure inks and flexographic inks that is excellent in friction resistance, oil resistance, heat resistance, and printability. Moreover, it is providing the printed matter using this ink composition.

  As a result of intensive studies to solve the above problems, the liquid ink composition of the present invention is obtained by blending a thermoplastic polyamide resin, a fiber-based resin, and an organic solvent using a specific vegetable fatty acid as a reaction raw material. The inventors have found that the friction resistance, oil resistance, heat resistance, and printability are improved, and have completed the invention.

  That is, the present invention relates to a liquid ink composition characterized by containing a thermoplastic polyamide resin (A) using a rice bran fatty acid as a reaction raw material, a fiber-based resin (B), and an organic solvent (C).

  The present invention further relates to a liquid ink composition containing 0.01 to 10.0% by mass of the total amount of the plasticizer (D).

  The present invention also relates to a liquid ink composition further containing a chelate crosslinking agent (E).

  The present invention also relates to a liquid ink composition further containing a colorant (F).

  The present invention also relates to a liquid ink composition in which the organic solvent (C) does not contain an aromatic organic solvent and / or a ketone solvent.

  Moreover, this invention relates to the printed matter formed by printing this liquid ink composition.

  According to the present invention, a liquid ink composition for gravure inks and flexographic inks excellent in friction resistance, oil resistance, heat resistance, and printability can be obtained.

  The liquid ink composition of the present invention is characterized by containing a thermoplastic polyamide resin (A) using rice bran fatty acid as a reaction raw material, a fiber-based resin (B), and an organic solvent (C).

The liquid ink composition of the present invention essentially comprises a thermoplastic polyamide resin (A) using rice bran fatty acid as a reaction raw material.
Polyamide resins are generally polycondensates of polycarboxylic acids and polyamines such as polymerized fatty acids and various vegetable fatty acids. Examples of the polymerized fatty acid include dimer acid and hydrogenated dimer acid. Examples of various vegetable fatty acids include tall oil fatty acid, palm oil fatty acid, coconut oil fatty acid, soybean oil fatty acid, cacao fatty acid, and mixed fatty acids of these natural fats and oils, and the present invention uses rice bran fatty acid as a reaction raw material. To do.

  Examples of the polyamine include an aliphatic polyamine, an alicyclic polyamine, and an aromatic polyamine. Examples of the aliphatic polyamine include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexane, piperazine, and N-amino. Examples of the ethyl piperazine include alicyclic polyamines such as isophorodiamine and bisaminomethylcyclohexane, and examples of the aromatic polyamine include metaxylene diamine. Among these, from the viewpoint of solubility, it is preferable to use an aliphatic diamine or an alicyclic diamine.

The thermoplastic polyamide resin (A) using rice bran fatty acid as a reaction raw material has a number average molecular weight of 1000 to 30,000, an acid value of 15 or less, and an amine from the viewpoint of maintaining the high gloss and blocking resistance of the liquid ink composition of the present invention. A value of 5 or less, a softening point of 90 to 150 ° C., and a number average molecular weight of 1000 to 30,000 are preferred, and a softening point of 100 to 130 ° C. and a number average molecular weight of 1000 to 20,000 are more preferred.
When the number average molecular weight is less than 1000, blocking resistance and heat resistance tend to be lowered, and when it exceeds 30,000, low-temperature flexibility tends to be lowered.
As for the compounding quantity of the thermoplastic polyamide resin (A) which makes a rice bran fatty acid a reaction raw material, 10-70 mass% is preferable with respect to the total solid in an ink composition.

  Moreover, the liquid ink composition of the present invention essentially comprises a fiber-based resin (B). A typical example of the fiber-based resin (B) is nitrified cotton. Nitrified cotton can improve the dispersibility of the pigment and can improve the heat resistance and oil resistance of the printing ink coating film by reacting with a metal chelate compound described later. The nitrified cotton used in the liquid ink composition of the present invention preferably has a nitrogen content of 10 to 13% by mass and an average degree of polymerization of 30 to 500, more preferably a nitrogen content of 10 to 13% by mass and an average degree of polymerization. 45-290. The blending amount of nitrified cotton is preferably 1 to 50% by mass with respect to the total solid content in the ink composition.

  The organic solvent (C) that can be used in the liquid ink composition of the present invention is not particularly limited, but for example, aromatic hydrocarbons such as toluene, xylene, Solvesso # 100, Solvesso # 150, hexane, methylcyclohexane, Examples include aliphatic hydrocarbons such as heptane, octane and decane, and various ester organic solvents such as methyl acetate, ethyl acetate, isopropyl acetate, normal propyl acetate, butyl acetate, amyl acetate, ethyl formate and butyl propionate. Water-miscible organic solvents include alcohols such as methanol, ethanol, propanol, butanol and isopropyl alcohol, ketones such as acetone, methyl ethyl ketone and cyclohaxanone, ethylene glycol (mono, di) methyl ether, ethylene glycol (mono, di) ethyl Ether, ethylene glycol monopropyl ether, ethylene glycol monoisopropyl ether, monobutyl ether, diethylene glycol (mono, di) methyl ether, diethylene glycol (mono, di) ethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether, triethylene glycol (mono, Di) methyl ether, propylene glycol (mono, di) methyl ether, propylene glycol Over mono propyl ether, propylene glycol monobutyl ether, dipropylene glycol (mono, di) include various organic solvents glycol ether such as methyl ether. Note that it is more preferable not to use an aromatic solvent such as toluene or a ketone solvent such as methyl ethyl ketone from the viewpoint of both work hygiene during printing and the harmfulness of the packaging material. Of these, a mixed solution of isopropyl alcohol / ethyl acetate / normal propyl acetate / methylcyclohexane is more preferable from the viewpoint of solubility in polyamide resin and nitrified cotton. In addition, glycol ethers can be added for drying adjustment as long as it is less than 10% by mass of the total amount of the composition.

Furthermore, in the liquid ink composition of the present invention, a plasticizer (D) may be added in order to improve the fluidity, adhesiveness, and friction resistance of the composition. In the case of a polycondensation polymer such as a polyamide resin, by adding a plasticizer (D), thickening can be suppressed, and the flexibility and flexibility of the dried ink film after printing can be maintained.
Examples of the plasticizer (D) include fatty oils such as castor oil, phthalic acid esters such as dioctyl phthalate, phosphoric acid esters, fatty acid esters such as adipic acid esters and sebacic acid esters, polyesters, and epoxies. Examples include epoxy systems such as modified vegetable oils, citric acid esters such as tributyl acetylcitrate, and sulfonic acid amide systems such as N-butylbenzenesulfonamide and N-ethyltoluenesulfonamide. Of these, citrate esters, epoxidized vegetable oils, phosphate esters and sulfonate amides are preferred.
The blending amount of the plasticizer (D) is preferably 0.01 to 10.0% by mass, more preferably 0.1 to 5.0% by mass, and more preferably 0.5 to 3.0% of the total amount of the composition. If it is mass%, it is still more preferable.

Furthermore, the liquid ink composition of the present invention may contain a chelate crosslinking agent (E). The chelate crosslinking agent (E) is intended to improve cohesion and is preferably a chelate type organic metal compound. As the metal chelate compound, organic titanium, organic zirconium, or organic aluminum can be used. When a chelate-type metal organic compound is used, the crosslinking reaction is completed without heating, but a stable crosslinking reaction is obtained that hardly causes hydrolysis at room temperature, and particularly when amine is present in the molecule. The effect is great.
Titanium chelate possesses Ti—O—C bonds in one molecule, and has a role of strengthening intermolecular or intramolecular crosslinking of the resin by having this alkoxy group. Examples of the titanium chelate include titanium alkoxide and titanium acylate. Examples of the titanium alkoxide include tetraisopropyl titanate, tetranormal butyl titanate, butyl titanate dimer, tetra (2-ethylhexyl) titanate, tetramethyl titanate, tetrastearyl titanate, triethanolamine titanate, titanium acetyl acetate, titanium ethyl acetoacetate. , Titanium lactate, octylene glycol titanate, titanium tetraacetyl acetate, titanium phosphate compound and the like. Of the organic titanium systems, titanium phosphate compounds and titanium acetyl acetate are preferred.
In addition, the compounding quantity of a chelate crosslinking agent (E) has preferable 0.1-5.0 mass% of a composition whole quantity, More preferably, it is 0.5-3.0 mass%.

  Examples of the colorant (F) used in the liquid ink composition of the invention include organic and inorganic pigments and dyes used in general inks, paints, and recording agents. Organic pigments include azo, phthalocyanine, anthraquinone, perylene, perinone, quinacridone, thioindigo, dioxazine, isoindolinone, quinophthalone, azomethine azo, dictopyrrolopyrrole, isoindoline, etc. Pigments. Indigo ink is copper phthalocyanine, and transparent yellow ink is C.I. I. Pigment No Yellow 83 is preferably used.

  For example, pigment C.I. I. Black7, Y12, Y13, Y14, Y17, Y83, Y74, Y-154, Y180, R57: 1, R122, R48: 1, R48: 2, R48: 3, R53: 1, R146, R-150 R-166, R170, R184, R185, V19, V23, V32, O13, O16, O34, G7, G36, B15: 3, B15: 4, W6 and the like.

  Examples of the inorganic pigment include carbon black, titanium oxide, zinc oxide, zinc sulfide, barium sulfate, calcium carbonate, chromium oxide, silica, bengara, aluminum, mica (mica), and the like. From the viewpoints of cost and coloring power, it is preferable to use titanium oxide for white ink, carbon black for black ink, aluminum for silver ink, and mica for pearl ink. Aluminum is in the form of powder or paste, but is preferably used in the form of paste from the viewpoint of handling and safety, and whether to use leafing or non-leafing is appropriately selected from the viewpoint of brightness and concentration. The colorant is an amount sufficient to ensure the concentration and coloring power of the ink, that is, 1 to 50% by mass with respect to the total mass of the ink composition, and 1 to 40% by mass with respect to the total solid content in the ink composition. It is preferable that it is contained in the ratio. Moreover, a coloring agent can be used individually or in combination of 2 or more types.

(Normal production method)
The liquid ink composition of the present invention can be produced, for example, by adding, for example, nitrified cotton and organic solvent (C) previously dissolved in an organic solvent to the thermoplastic polyamide resin (A) using rice bran fatty acid as a reaction raw material. Depending on plasticizer (D), chelate crosslinker (E), colorant (F), other additives such as polyethylene wax, amide wax, extender pigment, antistatic agent, antiblocking agent, ink fluidity and dispersion Usually used in a ball mill, attritor, sand mill, triple roll, etc., in combination with a surfactant or a resin compatible with polyamide resin in a range where thickening and gelation do not occur over time It is produced by kneading using a printing ink manufacturing apparatus. In particular, the addition of an antistatic agent is effective in suppressing static electricity troubles during printing called whiskers that are likely to occur when an ester solvent or a ketone solvent is used.

Examples of the resin that can be used in combination with the thermoplastic polyamide resin (A) using rice bran fatty acid as a reaction raw material include chlorinated polyethylene, chlorinated polypropylene, chlorinated polyolefin such as chlorinated ethylene / propylene, ethylene / vinyl acetate copolymer or the like Chlorinated resins, vinyl chloride / vinyl acetate copolymers, rosin resins and their modified products, ketone resins, cellulose resins such as cellulose acetate propionate and cellulose acetate butyrate, urethane-modified ketone resins, urethane resins, urethanes Examples include urea resins and maleic acid-modified resins.
The thermoplastic polyamide resin (A) using rice bran fatty acid as a reaction raw material, a polyamide resin derived from vegetable fatty acid such as tall oil, and a polyamide resin derived from synthetic fatty acid can also be mixed and used.

  The present invention provides a printed matter obtained by printing the above-described liquid ink.

The present invention will be described more specifically with reference to examples. Hereinafter, both “parts” and “%” are based on mass.
In addition, the measurement of the number average molecular weight (polystyrene conversion) Mn by GPC (gel permeation chromatography) in the present invention was performed using the HLC8220 system manufactured by Tosoh Corporation under the following conditions.
Separation column: Four TSKgelGMHHR-N manufactured by Tosoh Corporation are used. Column temperature: 40 ° C. Moving layer: Tetrahydrofuran manufactured by Wako Pure Chemical Industries, Ltd. Flow rate: 1.0 ml / min. Sample concentration: 1.0% by weight. Sample injection volume: 100 microliters. Detector: differential refractometer.

[Preparation of dimer acid (X) using rice bran fatty acid as a reaction raw material]
100 parts of rice bran fatty acid (acid value 200, iodine value 108), 6 parts of montmorillonite clay, 0.1 part of lithium hydroxide, 0.1 part of calcium hydroxide and 1 part of water were added to the autoclave. The inside of the system was placed in a nitrogen atmosphere, and after sealing, the pressure was maintained at 0.5 MPa while stirring and the mixture was heated at 230 ° C. for 3 hours. The reaction was then cooled to 130 ° C. and treated with 1 part of 75% phosphoric acid for 1 hour. Solid matter was removed by pressure filtration to obtain a crude product. This product was introduced into a falling film distillation apparatus, and the monomer acid was removed under the conditions of a pressure of 0.1 kPa and a temperature of 200 ° C.
The obtained dimer acid (X) was measured by GPC (gel permeation chromatography), and it was confirmed that the dimer component was 75%.

[Preparation of thermoplastic polyamide resin (A) using rice bran fatty acid as reaction raw material]
In a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen gas inlet tube, 100 parts of dimer acid (X) derived from rice bran fatty acid obtained above, rice bran fatty acid (Acid 100S; Borso Oil & Fat Co., Ltd.) 1 part), 5 parts of sebacic acid, 10 parts of ethylenediamine, 5 parts of hexamethylenediamine, and 0.24 part of triphenylphosphine were added, and the system was made into a nitrogen atmosphere. Slowly raise the temperature to 0 ° C. Subsequently, by performing dehydration condensation at 200 ° C. for 5 hours with stirring, a dimer acid-modified polyamide resin composition derived from rice bran fatty acid having a softening point of 125 ° C., an amine value of 2, an acid value of 8 and a number average molecular weight of 11,000 is obtained. Obtained.

[Preparation of thermoplastic polyamide resin (T) using tall fatty acid as reaction raw material]
In a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen gas inlet tube, dimer acid (Haridimer 270S; manufactured by Harima Chemicals Co., Ltd.) 100 parts, tall oil fatty acid (Hartol FA-1; Harima Chemical ( Co., Ltd.) 1 part, 5 parts of sebacic acid, 10 parts of ethylenediamine, 5 parts of hexamethylenediamine, and 0.24 part of triphenylphosphine were added, and the inside of the system was put into a nitrogen atmosphere. The temperature is slowly raised to 200 ° C. Subsequently, by performing dehydration condensation at 200 ° C. for 5 hours with stirring, a dimer acid-modified polyamide resin composition derived from tall fatty acid having a softening point of 123 ° C., an amine value of 2, an acid value of 8, and a number average molecular weight of 10,000 ( T) was obtained.

[Production of nitrified cotton varnish (S)]
37.5 parts of industrialized nitrified cotton H1 / 2 (nitrocellulose, non-volatile content 70%, viscosity 9.0 to 14.9% at JIS K-6703 with a solution concentration of 25.0%, manufactured by Taihei Chemicals Co., Ltd.) 62.5 parts of a mixture of isopropyl alcohol / ethyl acetate / normal propyl acetate / methylcyclohexane (weight ratio of 25/25/13/10) was added and mixed well to prepare a nitrified cotton varnish (S). .

Examples 1-9, Comparative Examples 1-8
[Ink preparation method]
The mixture mixed at the blending ratios shown in Table 1 and Table 2 is kneaded using a Mighty Mill (manufactured by Inoue Seisakusho Co., Ltd.) to prepare the indigo inks described in Examples 1-9 and Comparative Examples 1-8. The following evaluation was carried out for each.

(Viscosity measurement)
The indigo inks listed in Table 1 and Table 2 were used as Zaan Cup No. 4 was used to measure the viscosity at a liquid temperature of 25 ° C. immediately after ink production. The measured value is preferably 12 seconds to 18 seconds.

[Viscosity stability]
The indigo inks listed in Tables 1 and 2 were each collected in glass bottles and stored at 50 ° C. for 28 days. Thereafter, the viscosity was measured to evaluate the change in viscosity before storage.
(Evaluation criteria)
5: No viscosity change Viscosity change is less than 2 seconds 4: Viscosity change is small Viscosity difference is 2 seconds or more and less than 5 seconds 3: Viscosity change is slightly large Viscosity difference is 5 seconds or more and less than 10 seconds 2: Viscosity change is large Difference is 10 seconds or more and less than 15 seconds 1: Viscosity change is very large Viscosity difference is 15 seconds or more

〔Oil resistance〕
The indigo ink listed in Table 1 and Table 2 was applied with a bar coater # 10 to a biaxially stretched polypropylene film (FOR Thalm Chemical Co., Ltd., FOR thickness 20 μm) subjected to corona discharge treatment on one side, and allowed to stand for 24 hours. A printed material was created.
Next, 2 cc of soybean white squeezed oil was applied to the printed surface with a cotton swab and left in an oven at 40 ° C. for 24 hours. Thereafter, the dried white bar was rubbed with the soybean white squeezed oil application portion, and the state of the printed surface was visually evaluated.
(Evaluation criteria)
5: The printed film does not detach from the film at all.
4: Less than 20% is detached from the film as the area ratio of the printed film.
3: 20% or more and less than 40% of the film as the printed film area ratio
Is within the practical range.
2: 40% or more and less than 60% of the film as a printed film area ratio
Detach from.
1: 60% or more of the printed surface area is detached from the film.

〔Heat-resistant〕
The indigo ink listed in Table 1 and Table 2 was applied with a bar coater # 10 to a biaxially stretched polypropylene film (FOR Thalm Chemical Co., Ltd., FOR thickness 20 μm) subjected to corona discharge treatment on one side, and allowed to stand for 24 hours. A printed material was created.
Next, an aluminum foil is superimposed on the printed surface, and heat-pressed using a heat seal tester under conditions of a temperature of 180 ° C., a load of 2 kg / cm ² and a press-bonding time of 1 second, and cooled to room temperature of 25 ° C. It peeled off and evaluated the state of the printing surface visually.
(Evaluation criteria)
5: The printed film does not peel from the film at all.
4: Less than 20% peels from the film as the area ratio of the printed film.
3: 20% or more and less than 40% of the film as the printed film area ratio
Although it is peeled off, it is within the practical range.
2: 40% or more and less than 60% of the film as a printed film area ratio
Peel from.
1: 60% or more peels from the film as the area ratio of the printed surface.

〔Adhesiveness〕
The indigo ink listed in Table 1 and Table 2 was applied with a bar coater # 10 to a biaxially stretched polypropylene film (FOR Thalm Chemical Co., Ltd., FOR thickness 20 μm) subjected to corona discharge treatment on one side, and allowed to stand for 24 hours. A printed material was created.
Subsequently, after attaching a cellophane tape (manufactured by Nichiban Co., Ltd.) to this printed surface, the tape was quickly peeled off, and the state of the printed surface was visually evaluated.
(Evaluation criteria)
5: The printed film does not peel from the film at all.
4: Less than 20% peels from the film as the area ratio of the printed film.
3: 20% or more and less than 40% of the film as the printed film area ratio
Although it is peeled off, it is within the practical range.
2: 40% or more and less than 60% of the film as a printed film area ratio
Peel from.
1: 60% or more peels from the film as the area ratio of the printed surface.

(Abrasion resistance)
The indigo ink listed in Table 1 and Table 2 was applied with a bar coater # 10 to a biaxially stretched polypropylene film (FOR Thalm Chemical Co., Ltd., FOR thickness 20 μm) subjected to corona discharge treatment on one side, and allowed to stand for 24 hours. A printed material was created.
Then, using a Sutherland type abrasion tester, rubbing with white fine paper 100 times at a load of 2 pounds, and the indigo ink was visually evaluated.
(Evaluation criteria)
5: No color on the rubbed white fine paper.
4: A moderately light color of “5” and “3” is obtained on white fine quality paper that is rubbed.
3: The rubbing white fine paper is lightly colored but is in a practical range.
2: The rubbed white high-quality paper is colored moderately in the evaluations “3” and “1”.
1: A dark color is applied to white high-quality paper that has been rubbed.

[Printability test: Scratch test]
The indigo inks listed in Tables 1 and 2 were diluted with a mixed organic solvent having the same ratio used for ink preparation, and diluted with Zaan Cup No. 3 manufactured by Koseisha Co., Ltd. for 16 seconds. A biaxially stretched polypropylene film (FORTA made by Futamura Chemical Co., Ltd.) subjected to corona discharge treatment on one side using an MD type gravure printing machine (Fuji Machinery Co., Ltd.) equipped with a laser gravure plate having a plate depth of 25 μm. Printing was performed on a treated surface having a thickness of 20 μm. And the transfer degree (scratch degree) of the ink to the printing part of printed matter was evaluated. In the blur test, evaluation was performed at a printing speed of 300 m / min at a circumference of 600 mmφ of the gravure plate.
(Evaluation criteria)
5: There is no blur.
4: Slightly blurring occurred.
3: Slight blurring, practical range.
2: Scratch can be remarkably confirmed.
1: Scratch occurs frequently.

[Blocking resistance]
Using the permanent distortion tester (manufactured by Tester Sangyo Co., Ltd.), the printed surface and the non-printed surface of a good printed material with no evaluation of “5” in the printed material when printed under the above-mentioned distorted test conditions are combined. The film was tightened with a pressure of / cm ² and peeled by hand after 1 day at 40 ° C., and the blocking resistance was evaluated from the degree of ink peeling and the strength of peeling resistance.
(Evaluation criteria)
5: There is no peeling of the printed film, and no peeling resistance is felt.
4: There is no peeling of the printed film, but no peeling resistance is felt.
3: There is no peeling of the printed film, but peeling resistance is felt.
2: Peeling of the printed film is observed, and the stains are remarkably generated.
1: The printed film is almost peeled off and the peel resistance is felt strongly.

The raw materials in the table are as follows.
Nitrified cotton H1 / 2 (nitrocellulose, 70% non-volatile content, 9.0-14.9% viscosity at 25.0% solution according to JIS K-6703, manufactured by Taihei Chemicals Co., Ltd.)
Fastogen Blue 5380 (manufactured by DIC Corporation): C.I. I. Pig.
No. = B-15: 3
Siberizer C6 plasticizer (Merck): N-ethyl o / p-toluenesulfonamido titanium TAA chelating agent (BORICA): Titanium acetylacetonate CAS: 17927-27-9

  From the above results, the liquid ink composition of the present invention can have friction resistance, oil resistance, heat resistance, and printability.

  The liquid ink composition of the present invention is an environment-friendly gravure ink or flexographic ink from the viewpoint of saving carbon offset and fossil resources, such as food packaging materials such as bread, rice crackers and rice ball packaging, retort food packaging materials, It can be widely used in flexible packaging applications for industrial products such as snack confectionery packaging materials, liquid containers, sanitary, cosmetics and electronic parts.

Claims (5)

Thermoplastic polyamide resin rice bran fatty acid and the reactants (A), cellulose resins (B), organic solvents (C), and a liquid ink composition containing a plasticizer (D), the plasticizer The amount of (D) added is 0.01 to 10.0% by mass of the total amount of the composition,
A liquid ink composition, wherein the liquid ink composition is at least one selected from a citrate ester, an epoxidized vegetable oil, a phosphate ester type, and a sulfonic acid amide type .
Further, liquid ink composition of claim 1 containing chelating crosslinking agent (E).
Furthermore, the liquid ink composition of Claim 1 or 2 containing a coloring agent (F).
Liquid ink composition according to the organic solvent (C) is any one of claims 1-3 which does not contain an aromatic organic solvent and / or a ketone solvent.
The printed matter formed by printing the liquid ink as described in any one of Claims 1-4 .