KR100889574B1 - Ink composition for marker pen - Google Patents

Abstract

An ink composition for a marker pen is provided to improve coverage and color vividness even in using a little pigment, by using resin and additives. An ink composition for a marker pen comprises mill base 30~36 weight%, solvent 40~50 weight%, plasticizer 10~15 weight%, release agent 2~5 weight%, drying retardant 2~5 weight% and surfactant 5~8 weight%. The mill base comprises colored pigment 3~8 weight%, dispersing agent 0.3~1.5 weight%, resin 11.4~16.0 weight% and alcohol-based solvent 80~85 weight%. At least one kind of a plasticizer is contained in an amount of 10~15 weight% based on the total ink composition. The at least one kind of a plasticizer is selected from a group consisting of triarylphosphate, dimethylphthalate, dioctyl sebacate, dioctyl adipate and iso-octyl stearate.

Description

Marker pen ink composition {INK COMPOSITION FOR MARKER PEN}

The present invention relates to an ink composition having good physical properties such that curling properties are easily separated from a writing surface and greatly increase hiding power and color clarity.

The chalk that has been used up to now has a bad effect on occupational diseases such as instructor's respiratory disorder and classroom environment due to dust generated when writing or erasing.

To compensate for this, an ink composition for a black or colored marker pen has been developed for applying to a white board writing board on a white background.

However, in the case of the conventional white blackboard ink, when writing on a writing surface other than the white blackboard, the desired hiding power does not come out, and when writing on sheet paper, there is a problem that the afterimage of the pigment remains difficult to use when erased.

In addition, the phenomenon that the pigment is settled when left in the pen state in the downward direction occurs, there is also a problem inferior in product stability.

It is an object of the present invention to provide an ink composition for a multipurpose marker pen and a method of manufacturing the same, which have good physical properties such as curling property, which are easily separated from a writing surface, and have greatly increased hiding power and color clarity.

In order to achieve the above object,

According to one aspect of the invention,

In an ink composition for a marker pen comprising a mill base, a solvent, a plasticizer, a mold release agent, a drying retardant, and a surfactant, the mill base is 3 to 8% by weight of colored pigments, 0.3 to 1.5% by weight of a dispersant, and a resin. The ink composition for marker pens which consists of 11.4-16.0 weight% and the alcohol solvent 80-85 weight% can be presented.

In addition, according to another aspect of the present invention,

i) Disperse milling by dispersing 3 ~ 8% by weight of colored pigment, 0.3 ~ 1.5% by weight of dispersant, 11.4 ~ 16.0% by weight of butyral resin in 80 ~ 85% by weight of alcohol solvent, and milling the mill base with an average particle size of 0.10 ~ 0.16μm. Manufacturing; And

ii) 30 to 36% by weight of the mill base, 40 to 50% by weight of solvent, 10 to 15% by weight of plasticizer, 2 to 5% by weight of release agent, 2 to 5% by weight of drying retardant, 5 to 8% by weight of surfactant Including a step, it can be presented a method for producing an ink composition for a marker pen.

Hereinafter, the component which comprises the ink composition of this invention is demonstrated. The unit is weight percent.

Colored pigment is dyno mill, milled for 6-8 pass at 35 ℃ ~ 45 ℃, and the particle size distribution is 0.06 ~ 0.20μm, and the average particle size is 0.10 ~ 0.16μm. The content is preferably 3 to 8% by weight of the mill base, the hiding power is good in the above range.

The colored pigment used for this invention may be either a commercially available organic pigment or an inorganic pigment. In the present invention, PIGMENT RED 254 (CAS NO. 84632-65-5), PIGMENT GREEN 7 (CAS NO. 1328-53-6), PIGMENT BLUE 60 (CAS NO. 81-77-6), PIGMENT BLACK 7 (CAS NO. 84632-65-5) may be used, but is not limited thereto.

The resin imparts adhesion, curling property, and pigment settling prevention function of the ink composition, and may be used by selecting one or more of polyvinyl butyral resin, cellulose resin, and acrylic resin. Since the resin is in a powder state, it is used by dissolving at room temperature for 4 hours.

The content of the resin is preferably 11.4 to 16.0% by weight of the mill base, and 4 to 5.72% by weight in the total ink composition. If the content is less than 4% by weight, there is no peculiar curling effect, and after writing, the pigment residue is left.

Dispersants may include, but are not limited to, polymeric wet dispersants, lecithin, and the like. This function increases the raw material dispersibility of each component, and it is preferable to use 0.3 to 1.5% by weight of the mill base. When using less than 0.3% by weight, there is a problem in raw material dispersion and when it is used in excess of 1.5% by weight, the raw material dispersibility is increased. It increases, but there is a risk of gelation and deterioration by reaction with resin.

The solvent serves to increase the blending ratio of each component and to adjust the viscosity, and ethanol, isopropyl alcohol, n-propyl alcohol, acetone, and the like can be used. If the content of the solvent is too low, there is a problem that the viscosity of the composition is high so that the ink outflow from the marker pen is not very good, if too high, the composition is low viscosity, there is a problem that excessive outflow of ink from the marker pen and color is separated .

The plasticizer allows the thin film film of the resin to be well formed on the writing board surface according to the volatilization of the solvent after writing on the writing surface using ink, and improves the erasability of the handwriting, that is, erasability on the board. The plasticizer usable in the present invention may be used by selecting one or more of phosphate ester-based triaryl phosphate, dimethyl phthalate, dioctyl sebacate, dioctyl adipate, and isooctyl stearate. May be, but is not limited thereto. The plasticizer is preferably used 10 to 15% by weight of the total ink composition, the use of less than 10% by weight of the composition is lowered the flexibility of the composition is less erased, when used in excess of 15% by weight is too high the flexibility is poor drying There is.

The release agent functions to make the ink composition separate from the board or board so that it can be easily erased, and the polyoxyethylene lauryl ether, silicone, sorbitan monolaurate, and cetyl-2-ethylhexanoate (Cetyl 2 -ethyl hexanoate) may be used, but is not limited thereto. It is preferable to use the 2 to 5% by weight of the total ink composition, if less than 2% by weight of the composition of the composition on the blackboard or board is weak, there is a problem that is not easily erased, when used in excess of 5% by weight Oil spreading and scavenging can cause board contamination due to residual oil.

The drying retardant is responsible for delaying the drying of the composition, and may be used at least one of polyglycerol fatty acid ester, glycerin, sucrose fatty acid ester, but is not limited thereto. Since it has low solubility at room temperature, it is good to dissolve it at 50-60 degreeC. The drying retardant is good to use 2 to 5% by weight of the total ink composition, when used in excess of 5% by weight is a problem that the drying speed is slow, and when using less than 2% by weight, the drying proceeds quickly.

Surfactant aims at the peeling of a handwriting on writing surface, and there exist a cationic surfactant, anionic surfactant, nonionic surfactant, etc. in this. In the case of nonionic surfactants, ether type surfactants having high permeability are preferable, and polyoxyethylene alkyl ether, polyoxyethylene ethylene higher alcohol ether, polyoxyethylene nonylphenyl ether, cetyl-2-ethyl hexanoate, n Butyl oleate, i-octyl palmitate, etc. may be used.

The surfactant preferably contains 5 to 8% by weight of the total ink composition, but less than 5% by weight of the surfactant is difficult to achieve uniform handwriting, and when it exceeds 8% by weight, excessive residual oil during erasing is excessive. There is a problem that exists.

In order to prepare the ink composition of the present invention, 3 to 8% by weight of colored pigment, 0.3 to 1.5% by weight of dispersant, and 11.4 to 16.0% by weight of butyral resin are dispersed for 4 hours in 80 to 85% by weight of alcohol solvent, and then 6 to 6 minutes by Dyno mill. By milling about 8 passes, the mill base with a particle size distribution of 0.06 ~ 0.20μm and an average particle size of 0.10 ~ 0.16μm is prepared first. Next, 30 to 36% by weight of the prepared mill base, 40 to 50% by weight of solvent, 10 to 15% by weight of plasticizer, 2 to 5% by weight of release agent, 2 to 5% by weight of drying retardant, and 5 to 8% by weight of surfactant It can manufacture by mixing and stirring.

Marker pen ink of the present invention has excellent characteristics that are separated from the writing surface, and in addition to the white board, there is a property that falls easily when writing on various writing surfaces such as glass plates or sheet paper, and thus the application range is wider than conventional white board inks. In addition, the use of a small amount of pigment compared to the conventional white board ink by varying the content of the resin and additives significantly increases the hiding power and gloss when writing and prevents the pigment settling on the pen to improve the stability of the product.

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. However, this is presented as a preferred example of the present invention and in no sense can be construed as limiting the present invention. Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Example  One

Colored Pigment (PIGMENT RED 254 (JS.INTERNATIONAL), PIGEMNT GREEN 7 (KMAX Corporation), PIGMENT BLUE 60 (KMAX Corporation)) 8 wt%, Polymer Dispersant (DISPERBYK-183, BYK-CHEMIE) 0.3 wt%, Booty 13% by weight of Lal resin (BT 18, WACKER) is dispersed in 55% by weight of ethanol and 23.7% by weight of Isopropyl alcohol, and then milled for 6-8 passes with Dyno mill. A mill base having a particle size distribution of 0.06 to 0.20 μm with an average particle size of 0.10 to 0.16 μm was prepared.

Mill base prepared as above 32.0% by weight, Ethanol 25.2% by weight, Isopropyl alcohol 23.0% by weight, di-i-octyl sebacate (1321, OH SUNG) 1.1% by weight, di 6.5% by weight of octyl adipate, 3.0% by weight of iso octyl stearate (IOS, OH SUNG), 2.0% by weight of PA-67 (DOW CORNING), sucrose fatty acid ester (ZKS 570, ZIKO) 1.0% by weight, CASTOR OIL 1.0% by weight, 2.0% by weight of non-ionic surfactant n-Butyl Oleate (BO, OH SUNG), 3.2% by weight of i-Octyl Palmitate (IOP, OH SUNG) To prepare an ink composition of the present invention. The resin content contained in the final ink composition is 4.2% by weight.

Comparative example  One

Colored Pigment (PIGMENT RED 254 (JS.INTERNATIONAL), PIGEMNT GREEN 7 (KMAX Corporation), PIGMENT BLUE 60 (KMAX Corporation),) 8 wt%, Polymer Dispersant (DISPERBYK-183, BYK-CHEMIE) 0.3 wt%, Dissolve 10 wt% of butyral resin (BT 18, WACKER) in 56.8 wt% of ethanol, 24.9 wt% of isopropyl alcohol, and mill it for 6 ~ 8 passes with Dyno mill. Particle size distribution was 0.06 ~ 0.20μm to prepare a mill base having an average particle size of 0.10 ~ 0.16μm.

Mill base prepared as described above (mill base) 32.0% by weight, Ethanol 26.8% by weight, di-i-octyl sebacate (1321, OH SUNG) 0.9% by weight, dioctyl adipate An ink composition was prepared in the same manner as in Example 1, except that 5.5 wt% and 2.6 wt% of iso octyl stearate (IOS, OH SUNG) were used. The resin content contained in the final ink composition is 3.2% by weight.

Comparative example  2

Colored Pigment (PIGMENT RED 254 (JS.INTERNATIONAL), PIGEMNT GREEN 7 (KMAX Corporation), PIGMENT BLUE 60 (KMAX Corporation),) 8 wt%, Polymer Dispersant (DISPERBYK-183, BYK-CHEMIE) 0.3 wt%, 22 wt% of butyral resin (BT 18, WACKER) is dispersed in 49.5 wt% of ethanol, 20.2 wt% of isopropyl alcohol, and then milled for 6 ~ 8 passes with Dyno mill. Particle size distribution is 0.06 ~ 0.20μm to prepare a mill base with an average particle size of 0.10 ~ 0.16μm.

Mill base prepared as above 32.0% by weight, Ethanol 18.8% by weight, di-i-octyl sebacate (1321, OH SUNG) 1.8% by weight, dioctyl adipate An ink composition was prepared in the same manner as in Example 1, except that 10.4% by weight and 4.8% by weight of isococyl stearate (IOS, OH SUNG) were used. The resin content contained in the final ink composition is 7.0% by weight.

Test Example  One: Hiding power  evaluation

Written on a white chalkboard, sheet paper, and a glass plate with a width of 20 cm and a height of 5 cm, the naked line was visually observed and evaluated. The ink of Comparative Example 1 is less concealed because the writing line concentration is blurred in the board, sheet paper, and glass plate when the same amount of pigment is used, but the ink of the example uses the same amount of pigment but the writing line concentration is compared in the board, sheet paper, and glass plate. It is much darker than the previous example, improving the hiding power and increasing the gloss. Comparative Example 2 was too high viscosity when assembling in the pen is not smooth smooth hiding than Comparative Example 1.

Test Example  2 : On sheet paper Scavenging  evaluation

20cm in width and 5cm in length on the white board were left for 1 day, and the residual degree of pigment and oil remaining once with a blackboard eraser was visually assessed and evaluated for elimination (see FIG. 2). As a result, the ink of Comparative Example 1 had a residual pigment and oil after erasing, so that the staining of the sheet paper was severe, but the ink of the Example did not contaminate the sheet paper due to the residual pigment and oil. In Comparative Example 2, excessive oil was present after the erasing, and the degree of contamination of the sheet paper was severe.

Test Example  3: Dispersibility and Storage Stability Evaluation

In order to confirm the dispersibility of the liquid ink prepared in Example, the degree of separation of the solid-liquid layer which appeared when placed in a glass sample bottle and left for 10 days was evaluated. (Nib), writing part of pen tip) When left for 7 days in the upper direction, the NIB downward direction, and the NIB horizontal direction, the degree of separation was determined by comparing with the writing density in the initial state.

In Comparative Example 1, separation of the solid-liquid layer proceeded when left in the glass sample bottle for 20 days, but in the case of the ink prepared in Example, solid-liquid layer separation was hardly achieved when left in the glass sample bottle for 20 days. After 7 days left in the NIB upward direction, NIB downward direction, and NIB horizontal direction in the market, the comparative example 1 was separated and the concentration difference between the NIB upward direction and the NIB downward direction was severe. There was little difference in concentration. In Comparative Example 2, the solid-liquid layer was not separated when left in the glass sample bottle for 20 days, but after 7 days in the NIB upward direction, NIB downward direction, and NIB horizontal direction, the outflow was not smooth due to the viscosity increase. I didn't write well. In other words, it was found that the dispersibility and storage stability of the examples are high.

Figure 1a is a photograph showing the results of the comparison test the hiding force in the green board of Example 1 and Comparative Example 1 of the present invention,

Figure 1b is a photograph showing the results of a comparison test the hiding force in the board of the Example and Comparative Example 1 of the present invention,

Figure 1c is a photograph showing the results of a comparison test the hiding force in the sheet of the Example and Comparative Example 1 of the present invention,

Figure 1d is a photograph showing the results of comparing the hiding force in the glass plate of Example and Comparative Example 1 of the present invention,

Figure 2 is a photograph showing the results of a comparison test of the eraser in the sheet of the Example of the present invention and Comparative Example 1.

Claims (4)

In the ink composition for marker pens comprising a mill base, a solvent, a plasticizer, a mold release agent, a drying retardant and a surfactant, The mill base is composed of 3 to 8% by weight of pigment, 0.3 to 1.5% by weight of dispersant, 11.4 to 16.0% by weight of resin, and 80 to 85% by weight of alcohol solvent, The ink composition for the marker pen is 30 to 36% by weight of the mill base, 40 to 50% by weight of solvent, 10 to 15% by weight of plasticizer, 2 to 5% by weight of release agent, 2 to 5% by weight of drying retardant and interface An ink composition for a marker pen, comprising 5 to 8% by weight of activator. The method of claim 1, wherein at least one selected from the group consisting of triaryl phosphate, dimethyl phthalate, dioctyl sebacate, dioctyl adipate, and iso octyl stearate The ink composition for marker pens which contains a plasticizer 10-15 weight% of a total ink composition. The ink composition for marker pens according to claim 1, wherein the ink composition for marker pens contains 4 to 5.68% by weight of one or more resins selected from the group consisting of polyvinyl butyral resins, cellulose resins, and acrylic resins. i) Disperse and mill 3 to 8% by weight of colored pigments, 0.3 to 1.5% by weight of dispersant, and 11.4 to 16.0% by weight of butyral resin in 80 to 85% by weight of alcohol-based solvent. Manufacturing; And ii) 30 to 36% by weight of the mill base, 40 to 50% by weight of solvent, 10 to 15% by weight of plasticizer, 2 to 5% by weight of release agent, 2 to 5% by weight of drying retardant, 5 to 8% by weight of surfactant Comprising a step, a method for producing an ink composition for a marker pen.

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