KR101936938B1 - Cleaning solution composition for offset-printing cliche and cleaning method using the same - Google Patents

Abstract

The present invention relates to an offset printing plate cleaning liquid composition and a cleaning method using the same. More particularly, the present invention relates to an offset printing plate cleaning liquid composition comprising an alkali compound, a protonic polar solvent, and an aprotic polar solvent to form a fine pattern without containing a corrosion inhibitor and a fluorine compound It is possible to simultaneously remove the solidified ink remaining in the intaglio plate, that is, not only for the BM but also for the RGB ink, uniformly and at a high speed, without damaging the intaglio, thereby ensuring reproducibility of the print pattern, The present invention relates to an offset printing plate precursor composition and a cleaning method using the same, which can improve the process yield and productivity by introducing a direct cleaning process.

Description

TECHNICAL FIELD [0001] The present invention relates to an offset printing plate cleaning liquid composition for offset printing and a cleaning method using the same. BACKGROUND ART [0002]

The present invention relates to an offset printing plate precursor cleaning composition capable of rapidly removing solidified ink remaining on an intaglio after offset printing, and a cleaning method using the same.

The offset printing method has a merit of being capable of precisely printing fine patterns having a size of several tens to several hundreds of microns at a low cost without generating a harmful waste liquid, and has become a technology capable of replacing the photolithography process.

Of the offset printing methods, the intaglio offset printing method has been studied as a technique suitable for forming a fine pattern for wiring which is easy to form a fine pattern having a line width of 200 mu m or less and a relatively high height and is required to have high electrical conductivity.

In the intaglio offset printing method, ink is filled in an engraved part of an intaglio plate engraved with a pattern to be printed on a flat surface of a base material, the transferred ink is transferred to a blanket, and then re-transferred to the blanket . The shape of the fine pattern formed by the intaglio offset printing method is easily influenced by the fluidity of the ink, the pressure applied to the intaglio plate, or the like. When the ink filled in the intaglio plate is not transferred to the blanket, it is deformed. This is disadvantageous in that it is difficult to ensure the reproducibility of the fine pattern.

In order to solve this problem, residual ink is removed by a method of periodically cleaning the intaglio plate once or several times after intaglio offset printing. As the cleaning liquid, an amine-based solution is used as an ordinary peeling liquid or a cleaning liquid, but this solution has a disadvantage in that it is difficult to completely remove the solidified ink, and the corrosion resistance to metal is strong, so that a separate corrosion inhibitor is required. In addition, a solution containing a fluorine compound is also used, but this solution has a disadvantage that its stability is poor and the content of fluorine is high.

It is also difficult to simultaneously remove the red (R), green (G) and blue (B) inks for the black matrix (BM) and the alginic (RGB) It is difficult to remove the ink solidified after intaglio offset printing in a short period of time, so that the ink removal rate is slowed down and the productivity is lowered. You can.

Korean Unexamined Patent Publication No. 2012-65964 discloses an offset printing plate cleaning liquid composition and a cleaning method using the same.

Korea Patent Publication No. 2012-65964

The present invention relates to an offset printing offset cleaning liquid which does not contain a corrosion inhibitor and a fluorine compound and which can remove all the inks for BM and / or RGB remaining in the intaglio plate having fine patterns without damaging the intaglio plate, And to provide a composition.

Another object of the present invention is to provide a cleaning method in which a cleaning process can be continuously performed in-line in an offset printing process using the offset printing offset cleaning liquid composition.

1. An offset printing plate precursor cleaning composition comprising an alkaline compound, a quantum-polar solvent, and an aprotic polar solvent.

2. The offset printing separator cleaning liquid composition according to 1 above, wherein the alkali compound is an organic amine compound, an inorganic alkaline compound or a mixture thereof.

3. The offset printing plate precursor cleaning composition of claim 2, wherein the organic amine compound comprises a compound represented by the following formula

[Chemical Formula 1]

(Wherein R ₁ to R ₃ are independently a hydrogen atom, a substituted or unsubstituted alkyl or hydroxyalkyl group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or hydroxyalkenyl group having 2-10 carbon atoms, a substituted Or an unsubstituted cycloalkyl group or hydroxycycloalkyl group of 5 to 8 carbon atoms, a carboxy group, a phenyl group or a benzyl group, and when R ₁ to R ₃ are substituted, an amino group substituted or unsubstituted with an alkyl group having ₁ to 4 carbon atoms, , An alkyl group having 1 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms substituted with an alkoxy group having 1-10 carbon atoms, which is substituted or unsubstituted with a hydroxyl group, at least one of R ₁ to R ₃ is a hydrogen atom And R ₁ and R ₂ , R ₁ and R ₃ or R ₂ and R ₃ may be connected to form a ring of 4 to 8 angle).

4. The composition of claim 2, wherein the organic amine compound is selected from the group consisting of methylamine, ethylamine, monoisopropylamine, n-butylamine, sec-butylamine, isobutylamine, t-butylamine, pentylamine, monoethanolamine, Propanol, 3-amino-1-propanol, 4-amino-1-butanol, 2- (2-aminoethoxy) ethanol, (Methoxymethyl) aminoethanol, methyl (butoxymethyl) aminoethanol, aminoethylethanolamine, dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutyl (Ethylamino) ethanol, 2- (methylamino) ethanol, diethylamine, diethylamine, diisobutylamine, diisobutylamine, methylethylamine, methylpropylamine, methylisopropylamine, methylbutylamine, methylisobutylamine, diethanolamine, 2- Butanolamine, monomethylethanolamine, trimethylamine, triethylamine, tripropylamine, Amine, tributylamine, tripentylamine, dimethylethylamine, methyldiethylamine, methyldipropylamine, triethanolamine, N-methyldiethanolamine, N, N-dimethylethanolamine, N, N-diethylethanolamine (Methoxymethyl) diethanolamine, (hydroxyethyloxymethyl) diethylamine, monoethanolamine, diethanolamine, triethanolamine, diethanolamine, diethanolamine, N, N-dimethylaminoethanol, N, N-diethylaminoethanol, 2, 3-diethylaminoethanol, 2- (ethylamino) Amino-1-propanol, 4-amino-1-butanol, dibutanolamine, (2-aminoethylamino) (Methoxymethyl) dimethylamine, (butoxymethyl) dimethylamine, (isobutoxymethyl) di (methoxymethyl) diethylamine, Methyl (methoxymethyl) aminoethanol, methyl (methoxymethyl) aminoethanol, methyl (methoxymethyl) aminoethanol, (2-aminoethyl) piperazine, 1- (2-hydroxyethyl) methylamine, Methylpiperazine, 1-amino-4-methylpiperazine, 1-benzylpiperazine, 1-phenylpiperazine, N- (3-aminopropyl) morpholine, An offset printing intaglio that is at least one selected from the group consisting of methylmorpholine, 4-ethylmorpholine, N- formylmorpholine, N- (2-hydroxyethyl) morpholine and N- (3-hydroxypropyl) Cleaning liquid composition.

5. The offset printing plate precursor cleaning composition according to 2 above, wherein the inorganic alkaline compound is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide and ammonium hydroxide.

6. The offset printing separator cleaning liquid composition according to 1 above, wherein the alkali compound is contained in an amount of 1 to 30% by weight based on the total weight of the cleaning liquid composition.

7. The offset printing plate precursor cleaning composition according to item 1 above, wherein the protonic polar solvent comprises a compound represented by the following formula 2:

(2)

(Wherein R 1 and R 2 are each independently hydrogen, an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 5 carbon atoms; R 3 is a substituted or unsubstituted, An alkylene group having 5 to 5 carbon atoms or an alkenylene group having 2 to 5 carbon atoms).

8. The process of claim 1, wherein the protonic polar solvent is 4-hydroxymethyl-1,3-dioxolane, 4-hydroxymethyl-2,2-dimethyl- Dimethyl-1,3-dioxolane, 4-hydroxypropyl-2,2-dimethyl-1,3-dioxolane, 4-hydroxybutyl-2,2- At least one member selected from the group consisting of sulfur, 4-hydroxymethyl-2,2-diethyl-1,3-dioxolane and 4-hydroxymethyl-2-methyl- And the offset printing plate cleaning liquid composition.

9. The offset printing separator cleaning liquid composition of 1 above, wherein the protonic polar solvent is contained in an amount of 1 to 50% by weight based on the total weight of the cleaning liquid composition.

10. The magnetic recording medium according to item 1, wherein the aprotic polar solvent is at least one compound selected from the group consisting of an amide compound, a pyrrolidone compound, an imidazolidinone compound, a lactone compound, a sulfoxide compound, a phosphate compound, Wherein the pressure-sensitive adhesive layer is at least one selected from the group consisting of a pressure-sensitive adhesive layer and a pressure-sensitive adhesive layer.

11. The offset printing separator cleaning liquid composition of 1 above, wherein the aprotic polar solvent is contained in an amount of 20 to 95% by weight in the total weight of the cleaning liquid composition.

12. The offset printing puddle washing liquid composition of 1 above, wherein the quantum-sexic polar solvent and the aprotic polar solvent have a blend weight ratio of 1: 0.25-95.

13. The offset printing offset washing liquid composition of 1 above, further comprising water.

14. A cleaning method comprising a step of dissolving and removing an ink remaining on an intaglio with an offset printing offset cleaning liquid composition according to any one of items 1 to 13 above.

15. The cleaning method of claim 14, wherein the cleaning process is performed continuously on an in-line during the offset printing process.

INDUSTRIAL APPLICABILITY The offset printing plate cleaning liquid composition according to the present invention does not contain a corrosion inhibitor and a fluorine compound and can dissolve the solidified ink remaining on the intaglio plate at a high speed without causing damage to the intaglio plate in which the fine pattern is formed, Reproducibility of the pattern can be ensured.

Further, the cleaning liquid composition of the present invention can simultaneously remove both the ink for RGB as well as the ink for RGB uniformly and at a high speed, and the ink removed by cleaning can be reabsorbed on the intaglio plate to prevent re- have.

In addition, the cleaning composition and cleaning method of the present invention can be introduced directly during the offset process to continuously perform the cleaning process in-line, thereby improving the process yield and productivity.

The present invention relates to an offset printing plate precursor cleaning composition capable of rapidly removing solidified ink remaining on an intaglio after offset printing, and a cleaning method using the same.

Hereinafter, the present invention will be described in detail.

The offset printing offset cleaning composition of the present invention comprises an alkaline compound, a protonic polar solvent and an aprotic polar solvent.

The alkaline compound swells the solidified ink remaining on the intaglio plate and functions to smoothly disperse the pigment contained in the ink and to solvate the ink, and the ink dissolved in the rinsing process after cleaning is removed without being reabsorbed on the intaglio .

The kind of the alkali compound is not particularly limited, and examples thereof include an organic amine compound and an inorganic alkali compound. These may be used alone or in combination of two or more.

The kind of the inorganic alkali compound is not particularly limited, and examples thereof include sodium hydroxide, potassium hydroxide, calcium hydroxide, ammonium hydroxide and the like. These may be used alone or in combination of two or more.

The organic amine compound includes a compound represented by the following formula (1): < EMI ID =

 [Chemical Formula 1]

Wherein R ₁ to R ₃ are independently a hydrogen atom, a substituted or unsubstituted alkyl or hydroxyalkyl group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or hydroxyalkenyl group having 2-10 carbon atoms, a carboxyl group, A substituted or unsubstituted cycloalkyl group or a hydroxycycloalkyl group having 5 to 8 carbon atoms, a phenyl group or a benzyl group. R ₁ to R ₃ is a substituted alkoxy group having a carbon number of 1-10 unsubstituted or substituted with a substituted or unsubstituted with an alkyl group having 1 to 4 carbons when the substituted amino group, a carboxy group, a hydroxy group, an alkyl group, a hydroxy group of a carbon number of 1-10 May be substituted with an alkyl group having from 1 to 10 carbon atoms. Provided that at least one of R ₁ to R ₃ is not a hydrogen atom. These R ₁ and R _{2 ,} R ₁ and R _{3 ,} or R ₂ and R ₃ may be connected to form a ring of 4 to 8 angle.

The kind of the organic amine compound is not particularly limited and examples thereof include methylamine, ethylamine, monoisopropylamine, n-butylamine, sec-butylamine, isobutylamine, t-butylamine, pentylamine, monoethanolamine Amino-1-propanol, 4-amino-1-butanol, 2- (2-aminoethoxy) Primary amine compounds such as ethanol, methyl (methoxymethyl) aminoethane, methyl (methoxymethyl) aminoethanol, methyl (butoxymethyl) aminoethanol and aminoethylethanolamine; There may be mentioned dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutylamine, diisobutylamine, methylethylamine, methylpropylamine, methylisopropylamine, methylbutylamine, methylisobutylamine, diethanolamine , Secondary amine compounds such as 2- (ethylamino) ethanol, 2- (methylamino) ethanol, dibutanolamine, and monomethylethanolamine; But are not limited to, trimethylamine, triethylamine, tripropylamine, tributylamine, tripentylamine, dimethylethylamine, methyldiethylamine, methyldipropylamine, triethanolamine, N-methyldiethanolamine, N, (Methoxymethyl) diethylamine, (methoxymethyl) diethanolamine, and (hydroxyethyloxymethyl) diethylamine, and the like such as N, N-diethylethanolamine, (butoxymethyl) diethylamine, Thiamine compounds; But are not limited to, monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, 2-aminoethanol, 2- (ethylamino) ethanol, 2- (methylamino) ethanol, N-methyldiethanolamine, , N, N-diethylaminoethanol, 2- (2-aminoethylamino) -1-ethanol, 1-amino-2-propanol, Alkanolamines such as amino-1-butanol and dibutanolamine; (Methoxymethyl) dimethylamine, (methoxymethyl) dimethylamine, (butoxymethyl) dimethylamine, (isobutoxymethyl) dimethylamine, (methoxymethyl) diethanolamine (Methoxymethyl) aminoethanol, methyl (butoxymethyl) aminoethanol, 2- (2-aminoethoxy) ethanol, Alkoxy amines such as amino diglycol; 1- (2-hydroxyethyl) piperazine, 1- (2-aminoethyl) piperazine, 1- Methylpiperazine, 1-amino-4-methylpiperazine, 1-benzylpiperazine, 1-phenylpiperazine, N-methylmorpholine, 4-ethylmorpholine, N-formylmorpholine, N - (2-hydroxyethyl) morpholine, N- (3-hydroxypropyl) morpholine, and other cyclic amines. These may be used alone or in combination of two or more.

The content of the alkali compound is not particularly limited within a range that can perform its function, but may be contained in an amount of 1 to 30% by weight, preferably 3 to 20% by weight, based on the total weight of the cleaning liquid composition. When the content of the alkaline compound is 1 wt% or more and 30 wt% or less based on the total weight of the cleaning liquid composition, the ink remaining on the backing plate is sufficiently swollen to maximize the ink removing power.

The protonic polar solvent is a component that improves the solubility of the resin contained in the ink remaining on the intaglio plate and swells the fine pattern ink by penetrating deeply into the edge portion as well as the surface of the intaglio.

The protonic polar solvent includes a compound represented by the following formula (2): < EMI ID =

(2)

R 1 and R 2 are each independently hydrogen, an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 5 carbon atoms; R3 is an alkylene group having 1 to 5 carbon atoms, substituted or unsubstituted with a hydroxy group, and an alkenylene group having 2 to 5 carbon atoms.

Since the quantum-sexy polar solvent has a large influence on the swelling and solubility of the pigments of metals as well as the simple carbon pigments, the pigments which are not carbonaceous pigments have excellent ink removing ability on the intaglio plate.

The kind of the quantum organic solvent is not particularly limited, and examples thereof include 4-hydroxymethyl-1,3-dioxolane, 4-hydroxymethyl-2,2-dimethyl-1,3-dioxolane, 2-dimethyl-1,3-dioxolane, 4-hydroxypropyl-2,2-dimethyl-1,3-dioxolane, 4-hydroxybutyl-2,2- Dioxolane, 4-hydroxymethyl-2,2-diethyl-1,3-dioxolane, 4-hydroxymethyl-2-methyl-2-ethyl-1,3-dioxolane and the like. These may be used alone or in combination of two or more.

The content of the protonic polar solvent is not particularly limited within a range that can function, but may be included in an amount of 1 to 50% by weight, preferably 1 to 40% by weight, based on the total weight of the cleaning liquid composition. If the content of the protonic polar solvent is in the range of 1 wt% or more and 50 wt% or less based on the total weight of the cleaning liquid composition, the cleaning liquid is rapidly infiltrated into the interface between the surface of the glass substrate and the contaminant to increase the cleaning power, .

The polar aprotic solvent is an organic solvent that is very effective in dissolving the resin contained in the ink remaining on the intaglio plate, and swells and dissolves the solidified ink within a short period of time to accelerate permeation of the organic amine compound to the surface of the intaglio plate, Component.

The type of aprotic polar solvent is not particularly limited, and examples thereof include amide-based compounds such as formamide, N-methylformamide and N, N-dimethylformamide; Pyrrolidone compounds such as N-methylpyrrolidone and N-ethylpyrrolidone; Imidazolidinone compounds such as 1,3-dimethyl-2-imidazolidinone and 1,3-dipropyl-2-imidazolidinone; lactone-based compounds such as? -butyrolactone; Sulfoxide compounds such as dimethyl sulfoxide and sulfolane; Phosphate-based compounds such as triethyl phosphate, tributyl phosphate and the like; Carbonate-based compounds such as dimethyl carbonate and ethylene carbonate; cresol-based compounds such as 慣 -cresol, m-cresol and ρ-cresol, and pyrrolidone, amide, or a mixture thereof are preferable from the viewpoints of washing power and economical efficiency. These may be used alone or in combination of two or more.

The content of the aprotic polar solvent is not particularly limited within a range that can function, but may be included in the total weight of the cleaning liquid composition in an amount of 20 to 95% by weight, preferably 40 to 90% by weight. When the content of the aprotic polar solvent is 20 wt% or more and 95 wt% or less in the total weight of the cleaning liquid composition, the solubility improving effect and the swelling speed of the solidified ink are maximized for the resin contained in the ink remaining on the intaglio.

The mixing ratio of the protonic polar solvent to the aprotic polar solvent is not particularly limited and may be mixed at a ratio of 1: 0.25 to 95, for example, and preferably at a ratio of 1: 1 to 90, have.

Optionally, the offset printing offset cleaning composition of the present invention may further comprise water.

Water reduces the adhesion of ink and removes dry ink on a large surface quickly by lift-off. When water is included, the production cost can be reduced by reducing the amount of the organic solvent used.

The kind of water is not particularly limited, but it is preferably deionized distilled water. More preferably, it is deionized distilled water for semiconductor processing and has a resistivity value of 18 M OMEGA. / Cm or more.

The content of water is not particularly limited within a range capable of performing the function, but it may be included in the total weight of the cleaning liquid composition in an amount of 0.1 to 40% by weight, preferably 0.5 to 30% by weight. When the content of water is 0.1 wt% or more and 40 wt% or less in the total weight of the cleaning liquid composition, the effect of assisting the dissolution of the ink by the alkali compound and the solvent is maximized.

The ink to be cleaned of the offset printing separator cleaning liquid composition of the present invention is not particularly limited and may be any conventional ink for RGB, BM, Black or White including a binder resin, a polymerizable compound, a colorant, a polymerization initiator, bezel ink.

The above offset printing plate precursor cleaning composition of the present invention can be produced by a conventional method.

INDUSTRIAL APPLICABILITY The offset printing plate precursor cleaning composition of the present invention does not require a corrosion inhibitor and does not contain a fluorine compound even though it contains an organic amine used in a conventional photoresist stripping liquid or a cleaning liquid, so that the stability of the solution is excellent, All of the inks for RGB (red, green, and blue pixels) as well as the solidified inks remaining in the backing plate, for example, BM (black matrix) can be simultaneously removed at a uniform speed. In particular, not only the ink solidified after the printing process as the organic cleaning liquid but also the residual ink not solidified on the in-line in the printing process can be directly dissolved and removed, thereby improving the process yield and productivity. In addition, the ink dissolved through cleaning can be easily removed through the rinsing process, so that the dissolved ink can be prevented from being adsorbed on the backing plate to contaminate the backing plate. Thus, reproducibility of the print pattern can be ensured.

Further, the present invention provides a cleaning method comprising the step of dissolving and removing the ink remaining on the intaglio plate with the offset printing offset cleaning liquid composition.

In particular, the cleaning method of the present invention is characterized not only by the offset printing process but also by introducing the cleaning process during the offset printing process before the ink is solidified by using the organic cleaning liquid composition. That is, the cleaning liquid composition can be treated on the intaglio plate on in-line during the offset printing process to remove the solidified ink remaining on the intaglio plate as well as the non-solidified residual ink directly by dissolving it directly at a uniform rate. In this way, reproducibility of the print pattern can be ensured and at the same time, the takt-time can be reduced and the process yield and productivity can be greatly improved.

As a method for cleaning the offset printing intaglio plate using the cleaning liquid composition of the present invention, for example, there are a method of directly immersing the intaglio plate containing the ink remaining in the fine pattern in the cleaning liquid composition, a method of spraying the cleaning liquid composition on the intaglio plate, And a method of brushing after applying the composition. These methods may be used in combination. At this time, bubbles or ultrasonic waves may be applied to enhance the cleaning effect.

In addition, the use conditions (temperature, time, etc.) of the cleaning liquid composition are not particularly limited and may be appropriately selected depending on the content and concentration of the ink remaining on the intaglio plate, Lt; 0 > C for 1 second to 3 minutes.

After the intaglio plate is treated with the cleaning liquid composition of the present invention, a step of rinsing with water or an alcohol-based solvent may be further performed if necessary. The rinsing method is not particularly limited and may be performed by, for example, spraying water at a constant pressure using a spray nozzle and a cleaning knife. At this time, deionized distilled water, for example, deionized distilled water for semiconductor processing, having a resistivity of 18 M / cm can be used as the water.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the invention and are not intended to limit the scope of the claims. It will be apparent to those skilled in the art that such variations and modifications are within the scope of the appended claims.

Example

Example  1-11 and Comparative Example  1-10

A cleaning liquid composition was prepared using the ingredients and contents as shown in Table 1 below. Here, the content represents weight%.

division Alkaline compound
(weight%) Quantum polar solvent
(weight%) Aprotic polar solvent
(weight%) The mixing ratio of the quantum and polar aprotic solvents water
(weight%) Kinds content Kinds content Kinds content content Example 1 AEEA 5 D 19 A 76 2: 8 - Example 2 MMEA 5 E 10 B 85 1: 9 - Example 3 MDEA 3 E 29 C 68 3: 7 - Example 4 DGA 3 D 39 A 58 4: 6 - Example 5 MEA 6 D 19 C 75 2: 8 - Example 6 HEP 4 E 67 A 29 7: 3 - Example 7 DMEA 5 E 86 B 9 9: 1 - Example 8 DGA 5 D 27 A 63 3: 7 5 Example 9 DGA 5 E 63 A 27 7: 3 5 Example 10 KOH 5 D 57 B 38 6: 4 - Example 11 NaOH 5 E 38 A 57 4: 6 - Comparative Example 1 - - D 50 B 50 1: 1 - Comparative Example 2 MIPA 27 D 73 - - - - Comparative Example 3 DGA 41 - - B 59 - - Comparative Example 4 MEA 15 - - A 35 - 50 Comparative Example 5 DGA 5 E 45 - - - 50 Comparative Example 6 AEEA 5 - - A 95 - - Comparative Example 7 MMEA 5 D 95 - - - - Comparative Example 8 KOH 5 E 45 - - - 50 Comparative Example 9 KOH 5 - - A 95 - - Comparative Example 10 NaOH 5 D 95 - - - - AEEA: aminoethylethanolamine, MMEA: monomethylethanolamine,
MDEA: N-methyldiethanolamine, DGA: aminodiglycol,
MEA: monoethanolamine, HEP: 1- (2-hydroxyethyl) piperazine,
DMEA: dimethylethanolamine, MIPA: monoisopropanolamine,
KOH: potassium hydroxide, NaOH: sodium hydroxide,
A: N-methylformamide, B: N-methylpyrrolidone,
C: 1,3-dipropyl-2-imidazolidinone, D: HMDO: 4-hydroxymethyl-1,3-dioxolane,
E: HMDMDO: 4-hydroxymethyl-2,2-dimethyl-1,3-dioxolane

Test Example . Evaluation of cleaning ability

In order to evaluate the cleaning ability of red, green and blue inks for RGB and black ink for BM used for offset printing, a linear pattern fine pattern having a pattern width of 160 mu m, a width between patterns of 300 mu m and a height of 20-30 mu m was formed on a glass To form a test board for test evaluation similar to that of the intaglio offset offset print board. (PCF-R-001, Dongwoo Fine-Chem), green ink (PCF-G-001, Dongwoo Fine-Chem Co., Ltd.), blue ink (PCF-B- (DRW-001P, Dongwoo Fine-Chem Co., Ltd.) and white ink (DRW-001P, Dongwoo Fine-Chem Co., Ltd.) were coated in a fine pattern and dried at room temperature for about 30 minutes. Respectively.

The prepared specimens were immersed in a cleaning composition at room temperature for about one minute, and then taken out and rinsed with deionized distilled water for 30 seconds. After the rinse was completed, the specimen was completely dried using nitrogen.

Optical microscope photographs of the dried specimens were taken and evaluated for their cleaning ability based on the following criteria.

<Evaluation Criteria>

◎: ink is completely removed.

○: Excellent removal of ink.

?: A small amount of ink remained.

X: A large amount of ink remains.

division Cleaning ability Surface portion Edge portion Red
ink green
ink blue
ink black
ink White
ink Red
ink green
ink blue
ink black
ink White
ink Example 1 ◎ ◎ ◎ ◎ ◎ ○ ○ ○ ○ ○ Example 2 ◎ ◎ ◎ ◎ ◎ ○ ○ ○ ○ ○ Example 3 ◎ ◎ ◎ ◎ ◎ ○ ○ ○ ○ ○ Example 4 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 5 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 6 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 7 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 8 ◎ ◎ ◎ ○ ○ △ △ △ △ △ Example 9 ◎ ◎ ◎ ◎ ◎ ○ ○ ○ ○ ○ Example 10 ◎ ◎ ◎ ○ ○ △ △ △ △ △ Example 11 ◎ ◎ ◎ ○ ○ △ △ △ △ △ Comparative Example 1 △ △ △ × × × × × × × Comparative Example 2 ○ ○ ○ × × △ △ △ × × Comparative Example 3 ○ ○ ○ × × △ △ △ × × Comparative Example 4 × × × × × × × × × × Comparative Example 5 × × × × × × × × × × Comparative Example 6 ○ ○ ○ × × △ △ △ × × Comparative Example 7 ○ ○ ○ × × △ △ △ × × Comparative Example 8 × × × × × × × × × × Comparative Example 9 ○ ○ ○ × × △ △ △ × × Comparative Example 10 ○ ○ ○ × × △ △ △ × ×

Referring to Table 2, the cleaning composition compositions of Examples 1 to 11 containing an optimal content of alkali compound, aprotic polar solvent, and optionally nonionic surfactant in accordance with the present invention, compared to the cleaning composition compositions of Comparative Examples 1 to 10 Uniform, fast and excellent cleaning performance for red, green, blue, black and white inks.

On the other hand, the cleaning liquid composition of Comparative Example 1 which does not contain an alkaline compound had no swelling and dissolution of the residual ink but was not removed from the intaglio plate in the rinsing process, and the cleaning liquid composition of Comparative Example 2 containing no aprotic polar organic solvent There was a function of swelling and solubility. However, in the case of black and white, the ability to remove the surface of the base plate was lowered, and the edge portion could not be removed in some cases .

Also, in Comparative Example 3, which does not include the quantum-polar solvent represented by the general formula (2), swelling and dissolution performance of the ink including the aprotic polar organic solvent was observed, but it was confirmed that the dissolution time I could.

In the case of Examples 8 and 9 containing a small amount of water, the ink was detached from the cleaning liquid composition in the form of lift off rather than swelling or dissolving the ink while water was introduced. In the case of containing more aprotic polar solvent than the protonic polar solvent, the ink on the surface in contact with the cleaning liquid on the surface was quickly removed by desorption. It can be seen that the removing power against the dry ink is excellent, but a small amount of ink residue is found at the edge portion.

In Comparative Examples 4 and 5 including a large amount of water, the swelling and dissolution performance of the polar solvent was drastically decreased, and the desorption performance was also lowered.

In the case of Comparative Examples 6 to 10 including only one of the protonic polar solvent and the aprotic polar solvent, it was confirmed that the detergency was inferior due to the existence of a large amount of ink residue in some cases, though the surface removal power of the intaglio plate was excellent in some cases.

Claims (15)

As a composition for cleaning ink for black matrix (BM) and RGB,
An offset printing plate precursor washing liquid composition comprising an alkaline compound, a quantum-polar solvent containing a pigment dissolution agent represented by the following formula (2), and an aprotic polar solvent:
(2)

(Wherein R 1 and R 2 are each independently hydrogen, an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 5 carbon atoms; R 3 is a substituted or unsubstituted, An alkylene group having 5 to 5 carbon atoms or an alkenylene group having 2 to 5 carbon atoms).
The offset printing separator cleaning liquid composition according to claim 1, wherein the alkali compound is an organic amine compound, an inorganic alkaline compound or a mixture thereof.
The offset printing plate precursor cleaning composition according to claim 2, wherein the organic amine compound comprises a compound represented by the following Formula 1:
[Chemical Formula 1]

(Wherein R ₁ to R ₃ are independently hydrogen, a substituted or unsubstituted alkyl or hydroxyalkyl group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or hydroxyalkenyl group having 2-10 carbon atoms, An unsubstituted cycloalkyl group or hydroxycycloalkyl group having from 5 to 8 carbon atoms, a carboxy group, a phenyl group or a benzyl group;
A substituted or unsubstituted amino group, a carboxyl group, a hydroxy group, an alkyl group having 1-10 carbon atoms, or an alkoxy group having 1-10 carbon atoms, which is substituted or unsubstituted with a hydroxyl group, wherein R ₁ to R ₃ are substituted Or an alkyl group having 1 to 10 carbon atoms;
At least one of R ₁ to R ₃ is not a hydrogen atom;
Wherein R ₁ and R _2, R ₁ and R ₃ or R ₂ and R ₃ are connected can form a ring having 4 to 8 each).
The organic amine compound according to claim 2, wherein the organic amine compound is selected from the group consisting of methylamine, ethylamine, monoisopropylamine, n-butylamine, sec-butylamine, isobutylamine, t-butylamine, pentylamine, monoethanolamine, Amino-1-propanol, 4-amino-1-butanol, 2- (2-aminoethoxy) ethanol, methyl (Methoxymethyl) aminoethanol, methyl (butoxymethyl) aminoethanol, aminoethylethanolamine, dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutylamine, (Ethylamino) ethanol, 2- (methylamino) ethanol, diisobutylamine, diisobutylamine, diisobutylamine, diisobutylamine, diethylamine, diisobutylamine, methylethylamine, methylpropylamine, methylisopropylamine, , Monomethylethanolamine, trimethylamine, triethylamine, triphosphine N, N-dimethylethanolamine, N, N-dimethylethanolamine, N, N-dimethylethanolamine, N, N-dimethylethanolamine Amine, (methoxymethyl) diethylamine, (methoxymethyl) diethanolamine, (hydroxyethyloxymethyl) diethylamine, monoethanolamine, diethanolamine, triethanolamine , N, N-dimethylaminoethanol, N, N-dimethylaminoethanol, N, N-dimethylaminoethanol, N, N-dimethylaminoethanol, Amino-1-propanol, 4-amino-1-butanol, dibutanolamine, 2- (Methoxymethyl) dimethylamine, (butoxymethyl) dimethylamine, (isobutoxymethyl) dimethylamine, (methoxymethyl) Methyl (methoxymethyl) aminoethanol, methyl (methoxymethyl) aminoethanol, methyl (methoxymethyl) aminoethanol, (2-aminoethyl) piperazine, 1- (2-hydroxyethyl) methylamine, Methylpiperazine, 1-amino-4-methylpiperazine, 1-benzylpiperazine, 1-phenylpiperazine, N- (3-aminopropyl) morpholine, An offset printing intaglio that is at least one selected from the group consisting of methylmorpholine, 4-ethylmorpholine, N- formylmorpholine, N- (2-hydroxyethyl) morpholine and N- (3-hydroxypropyl) Cleaning liquid composition.
The offset printing separator cleaning liquid composition according to claim 2, wherein the inorganic alkaline compound is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide and ammonium hydroxide.
The offset printing plate precursor cleaning composition according to claim 1, wherein the alkali compound is contained in an amount of 1 to 30% by weight based on the total weight of the cleaning liquid composition.
delete The method of claim 1 wherein the protonic polar solvent is selected from the group consisting of 4-hydroxymethyl-1,3-dioxolane, 4-hydroxymethyl-2,2-dimethyl- Dimethyl-1,3-dioxolane, 4-hydroxypropyl-2,2-dimethyl-1,3-dioxolane, 4-hydroxybutyl-2,2- 4-hydroxymethyl-2,2-diethyl-1,3-dioxolane and 4-hydroxymethyl-2-methyl-2-ethyl-1,3-dioxolane Wherein the pressure-sensitive adhesive layer has a thickness of at least 10 mm.
The offset printing cleaning fluid composition according to claim 1, wherein the quantum-solid polar solvent is contained in an amount of 1 to 50% by weight based on the total weight of the cleaning liquid composition.
[3] The composition of claim 1, wherein the aprotic polar solvent is selected from the group consisting of an amide compound, a pyrrolidone compound, an imidazolidinone compound, a lactone compound, a sulfoxide compound, a phosphate compound, a carbonate compound, Wherein the offset printing plate cleaning liquid composition is at least one selected from the group consisting of the following.
The offset printing cleaning fluid composition of claim 1, wherein the aprotic polar solvent comprises 20 to 95 wt% of the total weight of the cleaning fluid composition.
The offset printing puddle cleaner composition of claim 1, wherein the quantum extreme polar solvent and the aprotic polar solvent have a blend weight ratio of 1: 0.25-95.
The offset printing plate precursor cleaning composition according to claim 1, further comprising water.
A cleaning method comprising the step of dissolving and removing an ink remaining on an intaglio with an offset printing offset cleaning composition according to any one of claims 1 to 6 and 8 to 13.
15. The cleaning method according to claim 14, which is carried out continuously on an in-line during an offset printing process.