JPH1060314A - Black drawing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a black drawing material which has lower color value, glass, and toxicity than those of a black drawing material contg. a carbon black itself as the colorant by using a composite of a black pigment and a specific substance as the colorant. SOLUTION: This material is prepd. by using, as the colorant, a composite comprising at least one black pigment (e.g. a carbon black) and a resin which is pref. water-insoluble and is pref. selected from among epoxy, acrylic, urethane, styrene, ethylene, phenol, urea, amide, melamine, and benzoguanamine resins. The composite is pref. in such a form that the pigment is covered with the resin, that the resin is bonded to the surface and/or the inside of the pigment, that the resin is stuck to the surface and/or the inside of the pigment, or that two or more such states are combined. This material has blackness equivalent to that of a drawing material contg. aniline black.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a black drawing material, and more particularly, to a water-based drawing material such as a black poster color, a watercolor paint, and an emulsion paint.

[0002]

2. Description of the Related Art Black has the effect of tightening pictures and enhancing chromatic colors, and can be said to be one of the most important colors in the field of painting and design. As a black drawing material for drawing black, a drawing material using carbon black as a coloring agent and a material containing aniline black are widely known.

[0003]

In the field of black drawing materials, blacker ones, in other words, those with lower brightness and less luster, can be said to be good quality drawing materials. Then, in two points of lightness and gloss, when comparing the above-described drawing material using carbon black as a coloring agent and the drawing material using aniline black as a coloring agent, aniline black has lower brightness,
And less glossy, darker. Therefore, in the case of a drawing material using carbon black as a coloring agent, if the blackness is insufficient, a drawing material containing aniline black is used.

However, a drawing material using aniline black as a coloring agent has a serious drawback of being toxic.
That is, although a black drawing material using carbon black as a coloring agent is safe, it is glossy and has insufficient blackness. On the other hand, a drawing material using aniline black as a coloring agent is satisfactory in terms of blackness, but is toxic and dangerous. Therefore, an object of the present invention is to provide a black drawing material having lower brightness, less gloss, and less toxicity than a drawing material using carbon black as a pigment.

[0005]

Means for Solving the Problems In order to achieve the above object, the inventors of the present invention have conducted studies and found that when a black drawing material is produced using a composite of a black pigment and a resin as a coloring agent, the black pigment is produced. It has been found that there is no gloss and the lightness is further reduced as compared with the case where it is blended as a colorant. The invention according to claim 1 based on this discovery is a black drawing material characterized in that a composite of one or more black pigments and a resin is used as a coloring agent.

The invention according to claim 2, which embodies the above invention, is the black drawing material according to claim 1, wherein the colorant is a composite of carbon black and a resin.

A third aspect of the present invention further embodies the above invention.
The invention described in the above is the black drawing material according to claim 1 or 2, wherein the black drawing material is aqueous and the resin is insoluble in water.

According to a fourth aspect of the present invention, the black pigment and the resin are combined in a form in which the black pigment is coated with a resin, and a resin is formed on the surface and / or inside of the black pigment. The black drawing material according to any one of claims 1 to 3, wherein the black drawing material is in a form in which a resin is attached to a surface and / or inside of a black pigment, or in a composite form thereof. . .

According to a fifth aspect of the present invention, the resin is epoxy resin, acrylic resin, urethane resin, styrene resin, ethylene resin, phenol resin, urea resin, amide resin, melamine resin, benzoguanamine. The black drawing material according to any one of claims 1 to 4, wherein the black drawing material is one or more resins selected from resins.

[0010]

Embodiments of the present invention will be further described below. The black drawing material of the present invention uses, as a coloring agent, a composite of one or more black pigments and a resin. The components other than the colorant are the same as those for ordinary poster colors and emulsion paints, and a known fixing agent, anti-drying agent, dispersant, extender, and the like are added as necessary.

[0011] Explaining the specific components of the black drawing material, carbon black is most suitable as a black pigment serving as a colorant. The method for producing carbon black and the raw materials are not particularly limited. The specific methods for producing carbon black are listed, and they are produced by known methods such as a thermal black method, an acetylene black method, a channel black method, a gas furnace black method, an oil furnace black method, a pine smoke method, and a lamp black method. Carbon black can be used in the present invention. The raw materials for carbon black are listed as natural gas, acetylene,
Carbon black derived from aromatic oil, pine resin, animal and vegetable oil, etc. can be used in the present invention.

Other examples of pigments that can be employed in the present invention include iron black, bone black, titanium black and the like. In addition, although the problem of toxicity remains, aniline black can be used in the present invention as a pigment for obtaining a black drawing material having lower brightness.

The resin constituting the composite with the pigment or the like is preferably insoluble in water. Examples of such resins include epoxy resins, acrylic resins, urethane resins,
Examples include styrene resin, ethylene resin, phenol resin, urea resin, amide resin, melamine resin, benzoguanamine resin, and the like, and these resins can be used alone or selectively blended.

The composite form of the black pigment or the like and the resin may be a form in which the resin is coated on the black pigment or the like, a form in which the resin is bonded to the surface or the inside of the black pigment, or a form in which the resin adheres to the surface or the inside of the black pigment. Desirably, any of these forms or a composite form thereof. Means for coating the surface of the black pigment with a resin include a microcapsule method, more specifically, an interfacial polymerization method, an insitu polymerization method, a curing-in-liquid coating method (orifice method), a phase separation method from an aqueous solution, and a liquid separation method. A middle drying method or the like can be adopted. In addition to the microcapsule method, there is a method of binding or attaching a resin to the dispersed black pigment. As an example, there is a pigment having a pigment as a core and its surface covered with a large number of colloidal resin particles. When a colorant covered with colloidal resin particles is used for the core of the above-described black pigment, it is preferable that the surrounding resin particles are sufficiently smaller than the core of the pigment. Further, it is desirable that the colloidal resin particles cover the core of the pigment with almost no gap. However, needless to say, the present invention does not exclude those in which the core of the pigment is directly exposed to the outside. Further, the colorant employed in the present invention, the pigment,
It may be one in which a resin having a size similar to that of the pigment particles is bonded. In addition, the black pigment or the like can be combined with the resin by kneading and pulverizing a black pigment or a black dye into a thermoplastic resin or a thermosetting resin.

The fixing agent to be incorporated in the drawing material is preferably a water-soluble one. For example, gum arabic, locust bean gum, tragacanth gum, guar gum, alginic acid,
Gelatin, carrageenan, casein, xanthan gum,
Dextran, methylcellulose, ethylcellulose,
Hydroxyethyl cellulose, sodium starch glycolate, carboxymethyl cellulose, sodium alginate, propylene glycol alginate,
Polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether, sodium polyacrylate, carboxyvinyl polymer, polyethylene oxide, a copolymer of vinyl acetate and polyvinyl pyrrolidone, an alkali metal salt of an acrylic resin, or the like can be employed alone or in a suitable mixture. .

In addition to water as a solvent, ethylene glycol, propylene glycol, glycerin, polyethylene glycol and the like may be appropriately mixed.

Examples of the extender include calcium carbonate, silica, and alumina silicate, and examples of the thickener include bentonite and a thixotropic agent. However, these are not necessarily required.

Nonionic dispersants,
Alternatively, it is desirable to mix anionic substances alone or in combination. Here, examples of the nonionic dispersant include polyoxyethylene derivatives such as polyoxyethylene nonylphenyl ether, and sorbitan derivatives. Examples of the anionic dispersant include a sodium formalin naphthalene sulfonate condensate and a polycarboxylic acid dispersant.

[0019]

Next, examples of the drawing material of the present invention and experiments conducted to confirm the effects of the present invention will be described.
As an example of the present invention, a poster color and an emulsion paint containing the colorant described below were produced. Explaining sequentially, in Table 1 below, those other than “Epicure U” were premixed, and this mixture was added to a three-roll mill for 3 minutes.
Twice to create a black pigment base. Then, "Epicure U" was added to this pigment base in the amount shown in Table 1,
The mixture was dispersed by a homomixer in 300 cc of a 5% gelatin solution at 60 ° C. and further stirred for 3 hours by a dissolver. Then, the obtained dispersion was filtered and dried to prepare a colorant in which the surface of carbon black as a black pigment was coated with an epoxy resin.

[0020]

[Table 1]

A black poster color was produced by the formulation shown in Table 2 containing the coloring agent. Black emulsion paint was also produced by the formulation in Table 3 which also contained a colorant. In the mixing of the emulsion paints, pre-mixes other than Movinyl 700 and Nopco 8034L are pre-mixed, and then Movinyl 700 and Nopco 803 are mixed.
4 L were added. In addition, mixing of the composition of Table 2 and Table 3 was performed by passing through a three-roll mill three times.

[0022]

[Table 2]

[0023]

[Table 3]

Similarly, in Table 4 below, “Euronate E
H), and then premixed with a three-roll mill.
A single pass made the pigment base. Then, “Euronate EH” was added to the pigment base in the amount shown in Table 4, and 60
The mixture was dispersed with a homomixer in 300 cc of a 5% gelatin solution at 5 ° C., and further stirred for 3 hours with a dissolver. Then, the obtained dispersion was filtered and dried to prepare a black colorant in which a surface of a carbon black as a black pigment was coated with a urethane resin.

[0025]

[Table 4]

Then, a black poster color was produced by the formulation of Table 2 containing the coloring agent. Black emulsion paint was also produced by the formulation in Table 3 which also contained a colorant.

Further, a black poster color was produced by using the composition shown in Table 2 containing Laborol 220 (M) black as a coloring agent and containing the coloring agent. The colorant used in the present experimental data was obtained by coating the surface of a pigment with an acrylic resin, and the shape of the particles was a true sphere. Similarly, a black emulsion paint was produced by the formulation of Table 3 containing a coloring agent.

Next, a comparative example will be described. As a comparative example, the components of Table 5 were mixed by passing through a three-roll mill three times using carbon black itself as a colorant to produce a black poster color. The formulation in Table 5 is based on the carbon black No. Except for the blending amount of 25, it is the same as that of the poster color of the example of Table 2 described above. The absolute amount of carbon black in the composition of the comparative example is smaller than the absolute amount of carbon black in the composition of the example. Further, only the coloring agent was added to the carbon black No. 25 was changed to carbon black # 45 manufactured by Mitsubishi Chemical Corporation to produce a black poster color. In addition, only the coloring agent was added to the carbon black No. From 25, carbon black manufactured by Tegusa Japan KK was changed to Printex 300 to produce a black poster color.

[0029]

[Table 5]

As yet another comparative example, the components shown in Table 6 were mixed by passing through a three-roll mill three times using carbon black itself as a colorant to produce a black emulsion paint. The formulation in Table 6 is based on the carbon black No. Except for the compounding amount of 25, it is the same as the emulsion paint of the example of Table 3 described above. Note that Movinyl 700 and Nopco 8034L were added later. Also in the composition of this comparative example, the absolute amount of carbon black is
Less than the absolute amount of carbon black in the formulations of the examples.

[0031]

[Table 6]

As another comparative example, the components shown in Table 7 were mixed by passing through a three-roll mill three times using aniline black as a coloring agent to produce a black poster color. The composition of Table 7 is the same as the composition of the poster color of the above-described Example of Table 2 except for the amount of aniline black.

[0033]

[Table 7]

The poster color and emulsion paint produced above were mixed with water at a weight ratio of 5: 1, and 0.6 g of the mixture was applied to a 5 cm × 8 cm drawing paper (white Kent 15).
5 g of JIS P-3301). Then, the test piece was placed on a spectrophotometer to measure the lightness. The results were as shown in Tables 8 and 9 below.

[0035]

[Table 8]

[0036]

[Table 9]

That is, the poster color and the emulsion paint containing the colorant according to the embodiment of the present invention are:
The brightness was lower than that of a poster color or the like using carbon black itself as a colorant as a comparative example, and it was black.
Further, as a result of visual observation, the poster color and the emulsion paint containing the colorant according to the example of the present invention had lower gloss than the poster color using carbon black itself as the colorant as the comparative example. The poster color in which the coloring agent according to the example of the present invention was blended exhibited blackness comparable to that of a paint in which aniline black was blended.

[0038]

The black drawing material of the present invention has lower brightness, lower luster and is comparable to a black drawing material blended with aniline black, compared to a commonly used black drawing material using carbon black itself as a coloring agent. It develops darkness.
Further, the black drawing material of the present invention has an effect of low toxicity. Therefore, the black drawing material of the present invention has an excellent effect of being black and safe.

Claims (5)

[Claims] 1. A black drawing material characterized in that a composite of one or more black pigments and a resin is used as a coloring agent. 2. The black drawing material according to claim 1, wherein the colorant is a composite of carbon black and a resin. 3. The black drawing material according to claim 1, wherein the black drawing material is water-based and the resin is insoluble in water. 4. The composite form of the black pigment and the resin may be a form in which the black pigment is coated with the resin, a form in which the resin is bonded to the surface and / or the inside of the black pigment, or a form in which the resin is bonded to the surface and / or the inside of the black pigment. The black drawing material according to any one of claims 1 to 3, wherein the black drawing material is any one of a form to which a resin is attached and a composite form thereof. 5. The resin is an epoxy resin, an acrylic resin,
The urethane resin, styrene resin, ethylene resin, phenol resin, urea resin, amide resin, melamine resin, one or more resins selected from benzoguanamine resins, according to any one of claims 1 to 4, Black drawing material.