KR20090037071A - Water-based ink composition which containing pigment with a metalic lustre - Google Patents

Abstract

A water-based ink composition is provided to express various colors unlike conventional pearl or aluminium powder pigment, to maximize gloss effect, and to improve stability by effectively suppressing the sedimentation of the formulation ingredients. A water-based ink composition with excellent metallic luster comprises aluminium pigment powder vacuum-deposited with synthetic resin 0.5~5.0 weight%, water-soluble thickener resin 0.1~5.0 weight%, precipitation inhibitor 1.0~40 weight%, dispersing stabilizer 1.0~7.0 weight%, moisturizing agent 1.0~40 weight%, coloring agent 0.2~3.0 weight% and the balance of water.

Description

WATER-BASED INK COMPOSITION WHICH CONTAINING PIGMENT WITH A METALIC LUSTRE

The present invention relates to an aqueous ink composition having excellent metal glossiness, and more particularly, by using aluminum pigment powder in which a synthetic resin is vacuum-deposited, an inherent metallic luster of aluminum pigment is expressed, and a colorant is applied to the vacuum-deposited synthetic resin layer. As it can be deposited, it is possible to deposit various colors as well as excellent metallic gloss. It is stable against acid, alkali and other corrosive solvents and is not affected by the materials used together, and it is water-soluble thickening resin, sedimentation inhibitor, dispersion stabilizer, humectant, It is related with the aqueous ink composition which is excellent in the metallic glossiness which the stability which can suppress the sedimentation of a composition component by including a coloring agent etc. effectively is improved.

In the ink composition having a conventional metallic luster, an aqueous ink composition using an aluminum powder pigment, an ink composition using a Pearl pigment, and an aqueous metallic ink using a fixing agent for coloring the aluminum powder with an organic pigment. And the like have been proposed.

At this time, in the case of the conventional typical aqueous ink composition, by using a gloss pigment, such as aluminum powder or pearl (Pearl) it was possible to obtain a little gloss and three-dimensional feeling, but was not satisfactory level.

 In addition, as a method of obtaining a metallic color, a method of coloring a gloss pigment using a colorant was applied, but a problem of loss of glossiness due to the use of a resin in the coloring step was generated. In addition, problems caused by deterioration of product reliability due to deposits and bubbles generated in the aqueous ink composition when left for a long time.

The present invention aims to solve problems such as loss of metallic glossiness due to loss of metallic glossiness, weakening of metallic glossiness on a stroke, or a decrease in reliability of a product due to deposition of composition components or generation of bubbles when the aqueous ink composition is left for a long time. .

As an example of the present invention for achieving the above object, the aqueous ink composition excellent in the metallic luster of the present invention is 0.5 to 5.0% by weight of an aluminum pigment powder, in which a synthetic resin is vacuum-deposited with respect to the total weight of an ink, and a water-soluble thickening resin of 0.1 to 5 It is characterized in that it comprises a weight percent, anti-settling agent 0.1 to 3.0% by weight, dispersion stabilizer 1.0 to 7% by weight, moisturizer 1.0 to 40% by weight, colorant 0.2 to 3.0% by weight and the balance of water.

Hereinafter, it will be described in detail for each composition component constituting the aqueous ink composition of the present invention.

First, the aqueous ink composition of the present invention uses aluminum pigment powder in which the synthetic resin is vacuum-deposited.

The aqueous ink composition of the present invention is an aqueous ink composition to which a synthetic resin is vacuum-deposited aluminum pigment powder, which is an aluminum film of various colors in which a synthetic resin and an adhesive pigment are bonded by a vacuum deposition method, wherein the synthetic resin is vacuum-deposited aluminum pigment powder. Is a new type of metal luster powder, which can be applied to obtain an aqueous ink composition exhibiting a very good metallic luster, and is also a fine powder, which exhibits excellent hiding power.

That is, the synthetic resin is vacuum-deposited aluminum pigment powder is composed of synthetic resin, adhesive pigment and aluminum metal, by adsorbing or coating the color pigment on the surface of the metal piece on which the synthetic resin is deposited by chemical adsorption method and vacuum deposition method, etc. It is a substance that makes it possible to express vivid and excellent glossiness and polychromaticity which cannot be obtained from metal powder. The synthetic resin is not limited as long as it is a resin capable of depositing the adhesive pigment and aluminum pigment powder, specifically, for example, acrylic synthetic resin, urethane synthetic resin and the like can be used.

In addition, the aluminum pigment powder vacuum-deposited synthetic resin can be produced by applying a variety of known vacuum deposition method is not limited by the method of the vacuum deposition method of the present invention.

As described above, the aluminum pigment powder in which the synthetic resin is vacuum-deposited is stable to acid, alkali, and other corrosive solvents because the synthetic resin acts as a protective film for the aluminum powder, and has excellent hiding power, thus not affecting the materials used together. Have Since the colorant is deposited on the vacuum-deposited synthetic resin layer, it is possible to deposit not only excellent metallic luster but also various colors. Since the synthetic resin is vacuum-deposited, the deposited thickness is formed in small units in nanometers so that the metallic luster of aluminum is excellent. Expressed.

In addition, compared to the conventional aluminum powder pigment specific gravity of 1.5 to 1.9 range, the aluminum pigment powder vacuum-deposited synthetic resin of the present invention has a specific gravity of 1.2 to 1.3 level does not settle in the ink composition, and the dispersibility is good Excellent stability.

The synthetic resin is vacuum-deposited aluminum pigment powder is used in the particle size of the particle size range of 10 ~ 200 ㎛, preferably 50 ~ 180 ㎛ large particle diameter, if the diameter is less than the above range tends not to strongly express metallic luster If the diameter is larger than the above range, the sedimentation separation of the particles themselves, the clogging of the pen tip, and the writing resistance tend to deteriorate. Therefore, it is preferable to maintain the above range in order to express a strong metallic luster on the cut line.

The aluminum pigment powder vacuum-deposited the synthetic resin is used in the ink composition 0.5 to 5.0% by weight, preferably 1.0 to 3.5% by weight, when the amount is less than 0.5% by weight does not effectively give a metallic luster to the handwriting, When the amount exceeds 5.0% by weight, it is difficult to pass the clearance between the ball and the ball receiving portion, which tends to interfere with ink outflow, which is not preferable.

The aluminum pigment powder in which the synthetic resin is vacuum-deposited is preferable because it can further enhance the metallic luster when using a colored material visually distinguished from the colorant. That is, it is better if the colorant constituting the background color at the time of writing and the aluminum pigment powder vacuum-deposited with the synthetic resin imparting metallic luster are different colors. The colors they represent are sufficient to be visually distinguished colors, and most preferably, when a color representing complementary colors is applied on the color wheel, the effect of the complementary colors used can be maximized.

Secondly, the aqueous ink composition of the present invention uses a water soluble thickening resin.

The said water-soluble thickening resin is a component used in order to provide moderate viscosity to suppress sedimentation of the solid content which comprises an ink composition. The aqueous ink composition of the present invention has a range of 400 to 900 poise (25 ° C, 1 rpm), preferably 500 to 700 poise (25 ° C, 1 rpm), and most preferably 500 to 650 poise (25 ° C, 1 rpm). It is preferable to use a thickening resin suitable to achieve this because it is preferable in terms of fluidity and dispersibility of the ink. That is, in order to most preferably suppress the sedimentation of the vacuum-deposited aluminum pigment powder of the synthetic resin having a high gloss particle size among the components constituting the aqueous ink composition of the present invention, the viscosity of the ink is measured using an EMD viscometer [TOKISANGYO Co., Ltd.]. , Ltd)] is especially good to adjust the viscosity at 25 ° C. at 1 rpm to indicate the above range. In addition, it is preferable to use a water-soluble thing for the said thickening resin so that it may be suitable for an aqueous ink composition.

As the water-soluble thickening resin, an ionic polysaccharide or a derivative thereof may be used. Specifically, for example, one or two species selected from ionic polysaccharides or derivatives thereof, such as xanthan gum, wellan gum and guar gum, may be used. The above mixture can be used, Preferably it is good to use the xanthan gum which is easy to adjust an average particle diameter minutely. In addition, the state of the handwriting written using the ink containing it is stable even for long term storage.

The water-soluble thickening resin is used 0.1 to 5% by weight, preferably 0.12 to 3.3% by weight in the aqueous ink composition of the present invention, if the amount is less than 0.1% by weight, the viscosity of the colored metal powder pigment occurs because If the amount of use exceeds 5% by weight, the fluidity of the ink decreases, and writing defects tend to occur due to poor traceability of the ink, which is not preferable.

Third, the aqueous ink composition of the present invention uses a sedimentation inhibitor.

The antisettling agent is a component used in order to prevent the solid components constituting the aqueous ink composition from settling during long term standing. The aqueous ink composition of the present invention may use smectite-based clay as a sedimentation inhibitor, and specifically, for example, montmonilonite, bentonite, acidic clay, biderite, chibunsai, One or a mixture of two or more selected from sconate and saponite may be used, and montmonilonite is preferably used. This is because there is a characteristic that the maintenance of the colorant is easy.

The anti-settling agent is used in the aqueous ink composition of the present invention 0.1 to 3.0% by weight, preferably 0.3 to 1.8% by weight, when the amount is less than 0.1% by weight tends to have a low effect of preventing the sedimentation of the solid component If the amount of use exceeds 3.0% by weight, the writing feeling tends to be extremely lowered, which is not preferable.

Fourthly, the aqueous ink composition of the present invention uses a dispersion stabilizer.

The dispersion stabilizer is a component used for controlling the viscosity of the ink in the aqueous ink composition of the present invention and for stable dispersion of composition components such as colorants. In the aqueous ink composition of the present invention, a water-soluble resin may be used as the dispersion stabilizer. Specifically, for example, a mixture of one or two or more selected from acrylic resins, styrene maleic acid copolymers, cellulose derivatives and styrene acrylic resins may be used. It is possible to use, and preferably, styrene acrylic resin can be used.

The dispersion stabilizer may be used in the aqueous ink composition of the present invention 1.0 to 7% by weight, preferably 2.2 to 6% by weight, when the amount is less than 1.0% by weight, the dispersion stability tends to be low, and the amount is 7 When the amount is more than% by weight, the ink viscosity at the initial stage of manufacture is high and the writing property tends to be lowered, which is not preferable.

Fifthly, the aqueous ink composition of the present invention uses a humectant.

The humectant uses a water-soluble organic solvent for drying the pen tip of the ink composition and preventing freezing of the ink.

Specifically, for example, one or a mixture of two or more selected from glycols such as glycerin, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, polyhydric alcohols, and the like can be used.

The moisturizing agent may be used in an aqueous ink composition of the present invention in an amount of 1.0 to 40% by weight, preferably 5 to 20% by weight, and when the amount is less than 1.0% by weight, wetting of the pigment or wear of the ball support of the tip is required. There is a tendency that the prevention and drying prevention effects of the nib tend to be lowered, and when the amount of use exceeds 40% by weight, the drying of the peeling line tends to be slow, causing a bleeding phenomenon to occur.

Sixth, the aqueous ink composition of the present invention uses a colorant.

The colorant is a component that allows the synthetic resin to be colored on the synthetic resin of the vacuum-deposited aluminum pigment powder to enable the expression of various colors in addition to the metallic luster. The colorant may be used without particular limitation to components that are not chemically or physically affected by the aluminum pigment powder in which the synthetic resin is vacuum deposited. For example, inorganic pigments, such as carbon black and titanium black, an organic pigment, etc. can be used.

The colorant is preferably used in the range of 0.2 to 3.0% by weight, preferably 0.1 to 1.5% by weight in the aqueous ink composition. When the amount of the colorant is less than 0.2% by weight, the color development is not sufficient, and 3.0% by weight. When there is more than this, there exists a tendency for the dispersibility to water to fall.

In addition, the aqueous ink composition of the present invention comprises water. That is, the aqueous ink composition of the present invention uses water as the main solvent, the amount of which is contained in the remaining amount in the total aqueous ink composition.

In addition to the components set forth above, as additives commonly used in the art within the scope of not impairing the object of the present invention, surfactants, rust inhibitors, preservatives, pH adjusting agents and the like can be used, and the use of such additives is within the scope of the present invention. Not limiting the obvious.

Although the aqueous ink composition excellent in the metallic luster of the present invention is not particularly limited, the aluminum pigment powder obtained by vacuum deposition of synthetic resin on the aluminum powder obtained by pulverization by a conventional method, a water-soluble thickening resin, a sedimentation inhibitor, Dispersion stabilizers, humectants, colorants, water and the like, and other additives are prepared by mixing and stirring.

In addition, a well-known dispersion method, defoaming method, filtration method, etc. can be employ | adopted at the time of the said mixing stirring.

The aqueous ink composition having excellent metallic luster of the present invention can be variously applied to a writing instrument field, a printing field, and the like, and particularly, when applied to the writing instrument field, excellent handwriting is stably exhibited.

According to the present invention, not only to remove the monotony of the conventional pearl (pearl) or aluminum powder pigment, but also to maximize the gloss effect by applying a multi-color aluminum film in one ink, Sedimentation can be effectively suppressed and stability can be improved.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited by the following Examples.

Examples 1-12 and Comparative Examples 1-6

In the following compositions and blending amounts shown in Tables 1 to 2, various known methods of preparing ink can be used to produce aqueous ink for ballpoint pens having a metallic luster of the present invention.

For example, by mixing and agitating each of the above components with a stirrer such as a dissolver and mixing and grinding by a ball mill and three rolls or the like, centrifugation and filtration to remove coarse particles, undissolved matters and mixed solids in the pigment particles. This can be obtained easily.

Test Example

Using the ink compositions of Examples 1 to 12 and Comparative Examples 1 to 6, metal glossiness, three-dimensional feeling, writing feeling, stability, viscosity, and viscosity stability over time were measured by the following method. Tables 1-2 are shown.

1) Metal glossiness: It was measured by visual observation of the handwriting state, the highest metallic gloss in writing state was indicated by ◎, the next highest one was indicated by ○, and the lower or no metallic glossiness was × Indicated.

2) Three-dimensional effect: The handwriting state was measured by visual observation, and the highest three-dimensional effect of the handwriting state was indicated by ◎, the next higher one was indicated by ○, and those with low or no metallic glossiness were indicated by ×.

3) Writing feeling: The writing feeling is marked as ◎ on the basis that the writing feeling is good and slippery by the sense of writing, and the next best is marked as ○, and the writing feeling is bad and not very slippery What was not possible was represented by x.

4) Written test: The handwriting test was done by hand, and the condition of handwriting and ink consumption were examined. In addition, the writing conditions in the automatic writing tester is writing speed 4.5m / min, writing load 100g, writing angle 70 °. As a result, it was indicated by ◎ that the ink could be consumed to the last, and ○ by the one that could be consumed to the very last.

5) Stability: The ink composition was settled by standing for one month in a constant temperature and humidity chamber (50 ° C, 60% RH), and the ink separation and the bubble generation in the ink were good and sufficiently writable was indicated by ◎. In the case of handwriting, there is no problem with a mark ○, and if not, the mark is indicated with a ×.

6) Viscosity of Ink and Viscosity Stability over Time: The viscosity at 25 rpm was measured at 1 rpm using an EMD viscometer (manufactured by TOKISANGYO Co., Ltd.) within one week after ink production. After leaving it at room temperature for 1 month, the viscosity value of 1 rpm was measured by the same method to confirm the viscosity stability over time of the ink composition. Viscosity stability with the said passage of time was shown by (circle) and the thing which does not differ within 10% with the initial stage, and the other thing was represented by x.

The components shown in Tables 1 to 2 are as follows.

Aluminum paste, Eckart cmbh & co.KG manufactured, AL-PASTE STAPA 212

Pigment powder ①, Showa Aluminum Powder Co., Ltd Manufacture, trade name Frend Color, Oike Industrial Co., Ltd. Manufacture, trade name LG COLOR, MEADOWBROOK, S, INC. Manufacturer, trade name # E000

Manufacture of pigment powder ②, Showa Aluminum Powder Co., Ltd, trade name Frend Color, Oike Industrial Co., Ltd. Manufacture, trade name LG COLOR, MEADOWBROOK, S, INC. Manufacture, trade name # P100404

Manufacture of Pigment Powder ③, Showa Aluminum Powder Co., Ltd, trade name Frend Color, Oike Industrial Co., Ltd., Trade name LG COLOR, MEADOWBROOK, S, INC. Manufacturer, trade name # E000

Pigment powder ④, Showa Aluminum Powder Co., Ltd manufacture, trade name Frend Color, Oike Industrial Co., Ltd. Manufacture, trade name LG COLOR, MEADOWBROOK, S, INC. Manufacture, Trade Name # P450404

Pigment powder ⑤, Showa Aluminum Powder Co., Ltd manufacture, trade name Frend Color, Oike Industrial Co., Ltd. Manufacture, trade name LG COLOR, MEADOWBROOK, S, INC. Manufacture, Trade Name # P210404

Pigment powder ⑥, Showa Aluminum Powder Co., Ltd manufacture, trade name Frend Color, Oike Industrial Co., Ltd. Manufacture, trade name LG COLOR, MEADOWBROOK, S, INC. Manufacturer, trade name # E000

Manufacture of Pigment Powder ⑦, Showa Aluminum Powder Co., Ltd, trade name Frend Color, Oike Industrial Co., Ltd., Trade name LG COLOR, MEADOWBROOK, S, INC. Manufacture, Trade Name # C330404

Water-soluble thickening resin ①, Sansho Co., Ltd., KELZAN GUM

Manufacture of water-soluble thickening resin ②, Dainippon Sunmitomo Pharma Co., Ltd, trade name ECHO GUM

Water soluble thickening resin ③, Sansho (manufactured by KK), trade name K9A48

Water-soluble thickener④, manufactured by Dainippon Sunmitomo Pharma Co., Ltd, trade name Leozan

Manufacture of water-soluble thickener ⑤, Rohm and Hass australia PTY LTD, trade name ACRYSOL (R) ASE-60

Water-soluble thickener⑥, manufactured by Wako Pure chemical industries.LTD, trade name HIVISWAKO 103

Sedimentation inhibitor ①, Kunimine industries co, LTD manufacture, trade name: KUNIPIA-F

Manufacture of Dispersion Stabilizer ①, Rohm and Hass australia PTY LTD, trade name ACRYSOL I-62 Thickang Agent

Colorant ①, manufactured by SINLOIHI co., LTD, trade name R / W L-YELLOW NF

Colorant ②, Nippon keikokangaku co., LTD manufacture, trade name LUMIKOL NKW-2302

Colorant ③, manufactured by FUJI PIGMENT CO., Ltd, trade name FUJI SP

Antirust agent, Tong Yang Chemical Co., Ltd., trade name B.T.L

Preservative, Dooyang Material, Proxel XL-2

According to Tables 1 to 2, the aqueous ink composition to which the synthetic resin of the present invention is applied with vacuum-deposited aluminum pigment powder can be confirmed that the sedimentation of the composition is less stable, excellent metallic luster, excellent three-dimensional, writing feeling, etc. Appeared.

In the above, a preferred embodiment of the aqueous ink composition having excellent metallic luster according to the present invention has been described. However, the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description. This also belongs to the scope of the present invention.

Claims (8)

0.5-5.0 wt% of aluminum pigment powder vacuum-deposited with synthetic resin, 0.1-5.0 wt% of water-soluble thickening resin, 0.1-3.0 wt% of antisettling agent, 1.0-7.0 wt% of dispersion stabilizer, 1.0-40 wt% of moisturizer, 0.2-3.0 colorant An aqueous ink composition having excellent metallic luster, comprising a weight% and a residual amount of water. The method according to claim 1, The synthetic resin is vacuum-deposited aluminum pigment powder is an aqueous ink composition excellent in metallic luster, characterized in that it has a diameter in the range of 10 ~ 200 ㎛. The method according to claim 1, The aluminum pigment powder is vacuum-deposited the synthetic resin is an aqueous ink composition excellent in metallic luster, characterized in that the color is visually distinguished from the colorant. The method according to claim 1, The water-soluble thickening resin is an aqueous ink composition excellent in metallic luster, characterized in that the ionic polysaccharides or derivatives thereof. The method according to claim 1, The anti-settling agent is an aqueous ink composition excellent in metallic luster, characterized in that the smectite-based clay mineral. The method according to claim 1, The dispersion stabilizer is an aqueous ink composition having excellent metallic luster, wherein the dispersion stabilizer is one or a mixture of two or more selected from acrylic resins, styrene maleic acid copolymers, cellulose derivatives, and styrene acrylic resins. The method according to claim 1, The moisturizing agent is an aqueous ink composition having excellent metallic luster, wherein the moisturizing agent is one or a mixture of two or more selected from glycols and polyhydric alcohols selected from glycerin, ethylene glycol, diethylene glycol, triethylene glycol, and propylene glycol. The method according to claim 1, The aqueous ink composition is an aqueous ink composition excellent in metallic luster, characterized in that exhibits a viscosity characteristic in the range of 400 ~ 900 poise (25 ℃, 1 rpm).