JP2017025246A - Aqueous paint composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an aqueous paint composition that uses pellet-like (e.g., granular) carbon black but is excellent in the dispersibility and dispersion stability of carbon black.SOLUTION: A method for producing an aqueous paint composition comprises a step for mixing at least pellet-like carbon black, at least one of (meth) acrylic acid resin and maleic acid resin, and nonionic surfactant.SELECTED DRAWING: None

Description

  The present invention relates to an aqueous paint composition and a method for producing the same. Specifically, the present invention relates to a method for producing an aqueous paint composition having excellent dispersibility of pellet-like carbon black and subsequent dispersion stability of carbon black, and an aqueous paint composition.

  Conventionally, oil-based paints, water-based paints, and the like are known as paints. As water-based paints, for example, pigments, resin binders, and the like are known. Water-based paints are characterized by rapid drying after drawing and easy dilution and washing with water.

  Carbon black is generally used as the black pigment used in the aqueous paint composition. For example, in a black aqueous paint composition, it is known that the blackness becomes higher as the primary particle diameter of carbon black used as a pigment is smaller (see, for example, Patent Document 1). However, when the primary particle size of the carbon black is reduced, the transparency of the aqueous paint composition is increased, so that gloss is easily generated on the black drawing surface. When gloss occurs on the black drawing surface, there is a problem that the blackness is lowered due to light reflection on the drawing surface.

  As a method for solving such a problem, for example, it is conceivable to use carbon black having a high structure as a pigment. However, high-structure carbon black is difficult to handle if it remains in powder form because of its low bulk specific gravity. For this reason, generally, carbon black having a high structure is granulated in a pellet form (granular form).

JP 2008-285632 A

However, as a result of investigation by the present inventor, although pellet-like carbon black is easy to handle, it is dispersed in an aqueous paint composition as compared with powdery carbon black as disclosed in Patent Document 1. It was revealed that the dispersion stability of carbon black in the obtained water-soluble paint composition was inferior. In particular, the high structure carbon black (e.g., for example, DBP oil absorption 130 cm ^3/100 g or more, still more for example 170cm ^3/100 g or more), but has the advantage of increased blackness is molded into pellets It was revealed that it was difficult to disperse in the aqueous paint composition and the dispersion stability was poor.
Under such circumstances, the present invention obtained the dispersibility of carbon black when preparing an aqueous paint composition, despite the use of pellet-like (including granular) carbon black. The main object is to provide a method for producing an aqueous paint composition having excellent dispersion stability of carbon black in the aqueous paint composition. Furthermore, another object of the present invention is to provide an aqueous paint composition that contains carbon black having a high structure and is excellent in dispersion stability of the carbon black.

The present inventor has intensively studied to solve the above problems. As a result, the method for producing an aqueous paint composition includes a step of mixing at least pellet-shaped carbon black, at least one of a (meth) acrylic acid resin and a maleic acid resin, and a nonionic surfactant. As a result, it was found that an aqueous paint composition having excellent dispersibility and excellent dispersion stability of the carbon black can be obtained. Furthermore, the present inventors, the carbon black contained in the pellets of carbon black having a high structure (DBP absorption amount of carbon black, for example, 170cm ^3/100 g or more) at which in each case, an aqueous paint composition, By containing the carbon black, at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin, and a nonionic surfactant, the carbon black is excellent in dispersibility and dispersion stability. It has been found that a paint composition can be obtained.
The present invention has been completed by further studies based on this finding.

That is, the present invention provides the following inventions.
Item 1. A method for producing an aqueous paint composition, comprising a step of mixing at least pellet carbon black, at least one of a (meth) acrylic resin and a maleic resin, and a nonionic surfactant.
Item 2. Item 1. The nonionic surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, sorbitan fatty acid ester, polyoxyalkylene derivative, and glycerin fatty acid ester. A method for producing the aqueous paint composition as described.
Item 3. Item ^{3. The} method for producing an aqueous paint composition according to Item 1 or 2, wherein the carbon black has a DBP absorption amount of 130 cm 3/100 g or more.
Item 4. Including at least carbon black, at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin, and a nonionic surfactant,
The aqueous paint composition whose DBP absorption amount of the said carbon black is 170 cm < ³ > / 100g or more.
Item 5. Item 4. The nonionic surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, sorbitan fatty acid ester, polyoxyalkylene derivative, and glycerin fatty acid ester. The aqueous paint composition as described.

According to the present invention, the carbon black is provided by mixing at least a pellet-like carbon black, at least one of a (meth) acrylic resin and a maleic resin, and a nonionic surfactant. An aqueous paint composition having excellent dispersibility and excellent dispersion stability can be suitably produced. Further, according to the present invention, even when the carbon black is a high structure (DBP absorption amount of carbon black for example 170cm ^3/100 g or more), the aqueous paint composition, in addition to the carbon black, ( By including at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin and a nonionic surfactant, an aqueous paint composition excellent in dispersion stability of carbon black having a high structure can be provided. .

1. Method for Producing Aqueous Paint Composition The method for producing the aqueous paint composition of the present invention comprises at least pellet-shaped carbon black, at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin, and a nonionic surfactant. And a step of mixing the above. Hereinafter, the manufacturing method of the aqueous paint composition of this invention is explained in full detail.

(Pelleted carbon black)
In the production method of the present invention, the pellet-like carbon black is obtained by forming powdery carbon black into a pellet. The pellet-like carbon black may be composed only of carbon black, or may be formed by molding carbon black together with a binder. Pellet-like carbon black can be produced by granulating carbon black alone or a mixture of carbon black and a binder. These pellet-like carbon blacks are easily available as commercial products. Examples of commercially available pellet-like carbon black include Toka Black # 4500 and # 8500 manufactured by Tokai Carbon Co., Ltd., such as # 30B and # 3050B manufactured by Mitsubishi Chemical Corporation.

  When the pellet-like carbon black is formed with a binder, the binder contained in the pellet is not particularly limited, but from the viewpoint of improving the dispersibility of the carbon black in the aqueous paint composition, dextrin, Water-soluble binders such as carboxymethyl cellulose, polyvinyl alcohol, and polyethylene glycol are listed. Further, the pellet-like carbon black may contain a surfactant or the like.

  When the pelletized carbon black is formed together with a binder, the binder content is usually about 0.75 to 6 parts by mass with respect to 100 parts by mass of the carbon black.

The DBP absorption of the carbon black constituting a pelletized carbon black is not particularly limited, and preferably about 40~380cm ³ / 100g. Further, from the viewpoint of suppressing a decrease in blackness due to light reflection on the image plane as a high structure carbon black, preferably 130 cm ^3/100 g or more, or more preferably more than 170cm ³ / 100g. The upper limit of the DBP absorption of carbon black is usually, 400 cm ^3/100 g or so. In the present invention, the DBP absorption amount of carbon black is the absorption amount of dibutyl phthalate per 100 g of carbon black, and is measured by a method in accordance with JIS K6217-4 (carbon black oil absorption amount for rubber). It is the value.

  The primary particle diameter of the carbon black constituting the pellet-like carbon black is not particularly limited, and is usually about 10 to 150 nm.

  The particle size of the pellet-like carbon black is not particularly limited, and is usually about 100 to 3000 μm.

  The blending amount of the carbon black in the form of pellets can be appropriately set according to the blackness required for the aqueous paint composition. For example, when it is set as a black aqueous | water-based paint composition, Preferably it is about 5-25 mass% in an aqueous paint composition, More preferably, about 10-20 mass% is mentioned. The amount of the pellet-like carbon black is within these ranges, so that the viscosity as an aqueous paint composition is appropriate and the paint has good elongation, and the coloring power (blackness) of the paint is also suitable. It can be. Furthermore, according to the method for producing an aqueous paint composition of the present invention, as described later, in addition to pellet-like carbon black, at least one of a (meth) acrylic resin and a maleic resin, and a nonionic interface In order to mix with the activator, even if the pelletized carbon black has such a blending amount, the carbon black is excellent in dispersibility, and the carbon black is also excellent in dispersion stability.

((Meth) acrylic resin and maleic resin)
In the present invention, by using at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin together with a nonionic surfactant described later, the dispersibility of the pellet-like carbon black, and the subsequent carbon black The dispersion stability in the aqueous paint composition is improved. That is, carbon black is dispersed from pellet-shaped carbon black by mixing pellet-shaped carbon black, at least one of (meth) acrylic acid-based resin and maleic acid-based resin, and nonionic surfactant, Carbon black is no longer in the form of pellets.

  From the viewpoint of enhancing the dispersibility and dispersion stability of carbon black, the (meth) acrylic resin is more preferably a styrene- (meth) acrylic acid copolymer and poly (meth) acrylic acid, and styrene- (meth Acrylic acid is particularly preferred. From the same viewpoint, the maleic resin is more preferably a styrene-maleic acid copolymer. Each of the (meth) acrylic acid resin and the maleic acid resin may be used alone or in combination of two or more. In the present invention, “(meth) acrylic acid” means “acrylic acid or methacrylic acid”.

  Although it does not restrict | limit especially as a weight average molecular weight of a (meth) acrylic-acid type resin and a maleic acid-type resin, respectively, For example, about 5,000-tens of thousands are mentioned. In addition, these weight average molecular weights are values measured by gel permeation chromatographic analysis using standard polystyrene.

  The blending amount of the (meth) acrylic resin and the maleic resin is not particularly limited, but the combined use with a nonionic surfactant increases the dispersibility and dispersibility of the carbon black, while increasing the gloss of the drawing surface. From the viewpoint of suppression, in the water-soluble paint composition, it is preferably about 0.1 to 5% by mass, more preferably about 0.1 to 1% by mass. In addition, when using together (meth) acrylic-acid type resin and maleic acid-type resin, this compounding quantity is the total amount of (meth) acrylic-acid type resin and maleic acid-type resin.

(Nonionic surfactant)
In the present invention, the nonionic surfactant mixed with the pellet-shaped carbon black is not particularly limited, but preferably polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, sorbitan fatty acid ester, polyoxyalkylene derivative, Examples include glycerin fatty acid esters. A nonionic surfactant may be used individually by 1 type and may be used in combination of 2 or more type.

  The blending amount of the nonionic surfactant is not particularly limited, but it can be used in combination with at least one of a (meth) acrylic acid resin and a maleic acid resin to improve the dispersibility and dispersibility of the carbon black, and the drawing surface. From the viewpoint of suppressing the gloss of the water-soluble paint composition, it is preferably about 0.01 to 5% by mass, more preferably about 0.1 to 2% by mass in the water-soluble paint composition.

(Anionic surfactant)
In the production method of the present invention, it is preferable to use an anionic surfactant in combination with the aforementioned nonionic surfactant. By using an anionic surfactant in combination, the gloss of the drawing surface can be suppressed while further improving the dispersibility and dispersibility of the carbon black. Although it does not restrict | limit especially as an anionic surfactant, Preferably a sulfonic acid type surfactant etc. are mentioned. An anionic surfactant may be used individually by 1 type, and may be used in combination of 2 or more types.

  The amount of the anionic surfactant is not particularly limited, but the dispersibility and dispersion of carbon black can be achieved by using a nonionic surfactant in combination with at least one of a (meth) acrylic acid resin and a maleic acid resin. From the viewpoint of suppressing the gloss of the drawing surface while enhancing the properties, in the water-soluble paint composition, preferably about 0.1 to 3.0% by mass, more preferably about 0.2 to 1.0% by mass. Is mentioned.

(Water-soluble resin)
In the method for producing an aqueous paint composition of the present invention, in addition to the above-described pellet-shaped carbon black, at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin, and a nonionic surfactant, It is preferable to mix the resin. The water-soluble resin is necessary for the purpose of suitably dispersing the carbon black in the aqueous paint composition and further fixing the colorant on the paint film after drying the paint film of the aqueous paint composition. It is a component blended accordingly.

  It does not restrict | limit especially as water-soluble resin, The water-soluble resin used for a well-known water-based paint composition can be used. Preferred examples of the water-soluble resin include water-soluble cellulose resins, dextrin, water-soluble acrylic resins, polyvinyl alcohol, polyvinyl pyrrolidone, and gum arabic. Among these, dextrin is preferable.

The cellulose resin is not particularly limited as long as it is made by ether-bonding other substituents to the hydroxyl group of cellulose. Specific examples include hydroxyethyl cellulose, methyl hydroxyethyl cellulose, methyl hydroxypropyl cellulose, carboxymethyl cellulose and the like. Can be mentioned. Among these, carboxymethylcellulose is preferable from the viewpoint of increasing the blackness of the drawing surface while enhancing the dispersibility and dispersibility of carbon black. In particular, DBP oil absorption amount as the carbon black of 170cm ^3/100 g or more high structure, styrene as (meth) acrylic acid-based resin - (meth) acrylate is used copolymer, the use of carboxymethyl cellulose as a water-soluble resin Thus, the blackness of the drawing surface can be further effectively increased while further improving the dispersibility and dispersibility of the carbon black. A water-soluble resin may be used individually by 1 type, and may be used in combination of 2 or more types.

  For example, as a commercially available product of hydroxyethyl cellulose, Tyroze H300P, Tyroze H4000P, Tyroze 10000P (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) can be exemplified. Further, for example, commercially available products of carboxymethyl cellulose include CMC Daicel 1120, CMC Daicel 1140, CMC Daicel 1190, CMC Daicel 2260, CMC Daicel 1290, CMC Daicel 1380 (above, manufactured by Daicel Industries, Ltd.), Serogen 5A, Serogen 6A Serogen 7A (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) can be exemplified.

  Specific examples of dextrin include white dextrin (Akadama Dextrin MF-30, No. 4-C, etc .: manufactured by Nissho Chemical Co., Ltd.), yellow dextrin (Akadama Dextrin No. 102S, ND-S, etc .: Nissho Chemical Co., Ltd. Co., Ltd.), roasted dextrins represented by British gum (Akadama British Gum No. 69, APA, etc .: manufactured by Nissho Chemical Co., Ltd.), enzyme-modified dextrins called maltodextrin (Amicol SQ, Penon PKW, etc.): Nissho Chemical Co., Ltd.).

  The water-soluble acrylic resin is obtained by polymerizing acrylic acid and its derivatives, and converting the acid end group to an alkali salt and dissolving in water. Specifically, methyl methacrylate, methyl acrylate, ethyl acrylate, Examples include esters such as ethyl methacrylate, isopropyl acrylate, isopropyl methacrylate, butyl acrylate, and butyl methacrylate, or copolymers obtained by combining the above acrylic esters and methacrylic esters, and styrene-acrylic ester copolymers. It is done. Examples of commercially available water-soluble acrylic resins include Jonkrill 62, Jonkrill 70, Jonkrill 678, Jonkrill 683, Jonkrill 690 (manufactured by BASF).

  In the production method of the present invention, when the water-soluble resin is mixed, the amount of the water-soluble resin is not particularly limited, but is preferably about 10 to 30% by mass, more preferably about 10 to 25% by mass. . By setting the content of the water-soluble resin to 10% by mass or more, and further to 15% by mass or more, excellent fixing power can be imparted to the aqueous paint composition. Further, by setting the content of the water-soluble resin to 30% by mass or less, and further to 25% by mass or less, the aqueous paint composition has a suitable viscosity, and can be a paint having good elongation at the time of drawing. The gloss of the surface can be suppressed.

(water)
In the production method of the present invention, it is preferable to mix water. Although it does not restrict | limit especially as a compounding quantity of water, Preferably it is 10-80 mass% from a viewpoint which makes drying time suitable, setting it as the suitable viscosity and the paint which has the elongation at the time of drawing suitably. Degree, more preferably about 20 to 60% by mass.

(Wetting agent)
In the production method of the present invention, the wetting agent is a component blended as necessary for the purpose of preventing freezing of the aqueous paint composition, delaying drying, improving re-solubility and the like.

  The wetting agent is not particularly limited, and a wetting agent used in a known aqueous paint composition can be used. Specific examples of the wetting agent include glycerin, ethylene glycol, propylene glycol, dipropylene glycol, sorbitol, urea and the like. One type of wetting agent may be used alone, or two or more types may be used in combination.

  When the wetting agent is blended in the aqueous paint composition of the present invention, the content is not particularly limited, but is preferably about 0.1 to 20% by mass, more preferably about 0.5 to 10% by mass. It is done. When the content of the wetting agent is 0.1% by mass or more, and further 0.5% by mass or more, the aqueous paint composition after drying can be suppressed from becoming brittle. Moreover, when the content of the wetting agent is 20% by mass or less, and further 10% by mass or less, the drying time of the aqueous paint composition can be made appropriate.

(Other ingredients)
In the manufacturing method of this invention, you may mix | blend another component as needed other than the component mentioned above. Examples of other components include components blended in known aqueous paint compositions, such as extender pigments, preservatives, thickeners, antifoaming agents, and the like. Examples of extender pigments include calcium carbonate, barium carbonate, bentonite, kaolin, talc, silica, alumina silicate, alumina, calcium sulfate, barium sulfate, and clay. These other components may be used individually by 1 type, and may be used in combination of 2 or more types.

  When blending the extender pigment, the blending amount of the extender pigment is not particularly limited, but is preferably 30% by mass or less, more preferably 20% by mass or less. By setting the amount of the extender pigment to 30% by mass or less, and further to 20% by mass or less, the aqueous paint composition can be made to have a suitable viscosity and a paint having good elongation at the time of drawing.

  Specific examples of the method for producing the aqueous paint composition of the present invention include pellet-shaped carbon black, at least one of (meth) acrylic acid-based resin and maleic acid-based resin, nonionic surfactant, and blended as necessary. The above-described components are sufficiently stirred and kneaded with a dissolver until uniform, and then kneaded using a roll mill. The kneading time by the dissolver and roll mill, kneading temperature and the like are not particularly limited, and may be appropriately set as in the known method for producing an aqueous paint composition.

The aqueous paint composition obtained by the production method of the present invention can be suitably used as a transparent watercolor paint or a translucent watercolor paint. In particular, carbon black is high structure constituting a pelletized carbon black (DBP absorption amount, for example, 130 cm ^3/100 g or more, more preferably 170cm ^3/100 g or more) when it is, the light of the drawing surface of the paint Since the decrease in blackness due to reflection is effectively suppressed, it is suitable as an opaque watercolor paint or a translucent watercolor paint.

2. Water-soluble paint composition The water-soluble paint composition of the present invention comprises at least carbon black, at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin, and a nonionic surfactant. absorption, characterized in that at 170cm ^3/100 g or more.

Although it does not restrict | limit especially as a manufacturing method of the aqueous paint composition of this invention, It can manufacture suitably by the method demonstrated in the item of the above-mentioned "1. Manufacturing method of aqueous paint composition." That is, in the manufacturing method described above, carbon black constituting a pelletized carbon black, by DBP absorption used more than 170cm ^3/100 g, can be suitably produced.

In aqueous paint composition of the present invention, except that the DBP absorption of carbon black is 170cm ^3/100 g or more, the same carbon black as described in the item "1. manufacturing method of an aqueous paint composition" of the aforementioned It is. In addition, the (meth) acrylic acid-based resin and maleic acid-based resin, nonionic surfactant, anionic surfactant, water-soluble resin, water, wetting agent, the types and blending amounts of other components are also described above. This is the same as the item of “1. Method for producing aqueous paint composition”.

As described above, in the water-soluble paint composition of the present invention, carbon black is not a pellet form, DBP absorption amount is dispersed as 170cm ^3/100 g or more powdery.

In aqueous paint composition of the present invention, because the DBP absorption of the carbon black is high structure that 170cm ^3/100 g or more, a decrease in blackness due to light reflection on the drawing surface of the paint can be effectively suppressed. Therefore, the aqueous paint composition of the present invention is particularly suitable as an opaque watercolor paint or a translucent watercolor paint.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated, this invention is not limited to these Examples.

(Example 1-7, Comparative Example 1-4, Reference Example 1)
Each raw material was stirred with a dissolver until the composition and blending amount (parts by mass) shown in Table 1 were uniform, to obtain a dispersion. Next, the obtained dispersion was passed through a three-roll mill twice to obtain aqueous paint compositions of Example 1-7, Comparative Example 1-4, and Reference Example 1. The details of the carbon black listed in Table 1 are as follows. The DBP absorption amount of carbon black is a value measured by the method described above.

<Carbon black>
Carbon black (pelletized) DBP absorption 175cm ^3/100 g (primary particle size 50 nm)
Carbon black (pellet shape) DBP absorption 135cm ³ / 100g (primary particle diameter 38nm)
Carbon black (pellet shape) DBP absorption 62cm ³ / 100g (primary particle size 36nm)
Carbon black (powder) DBP absorption of 110 cm ^3/100 g (primary particle size 24 nm)

(Evaluation of dispersibility)
The dispersion state of carbon black in the above dispersions obtained when preparing the aqueous paint compositions of Example 1-7, Comparative Example 1-4, and Reference Example 1 was evaluated by the following methods. Each dispersion was thinly spread on a drawing paper with a painting knife and dried. The roughness of the coated surface after drying and the presence or absence of coarse particles were confirmed visually and with a finger, and evaluated according to the following criteria. The results are shown in Table 1.
A: There is no roughness and the coating surface is uniform. O: The coating surface is rough, but there are no coarse particles, and the coating surface is uniform. Δ: Small particles are observed on the coating surface. X: Coarse particles are present on the coating surface. Seen

(Evaluation of dispersion stability)
The aqueous paint compositions obtained in Example 1-7, Comparative Example 1-4, and Reference Example 1 were sealed in a polypropylene container and stored at 50 ° C. for 1 month. Changes in hardness of the aqueous paint composition after storage and the aqueous paint composition before encapsulation were evaluated according to the following criteria. The results are shown in Table 1.
○: No change in hardness before encapsulation and after storage Δ: Slightly harder after storage than before encapsulation ×: Much harder after storage than before encapsulation

(Evaluation of blackness)
To 100 parts by mass of the aqueous paint composition obtained in Example 1-7, Comparative Example 1-4, and Reference Example 1, 20 parts by mass of water was added and mixed well. Next, the obtained paint liquid was spread on the Kent paper three times in the vertical direction, the horizontal direction, and the vertical direction. Next, after drying, the maximum spectral reflectance was measured using a spectral color difference meter (SE-2000 manufactured by Nippon Denshoku Industries Co., Ltd.), and the blackness was evaluated according to the following criteria. The results are shown in Table 1.
◎: The maximum spectral reflectance is less than 3.0, and jet blackness is felt strongly. ○: The maximum spectral reflectance is 3.0 or more and less than 3.2, and it is felt jet black. Δ: The maximum spectral reflectance is 3.2. It is less than 3.8, feels a little black, and has a weak jetness x: The maximum spectral reflectance is 3.8 or more and does not feel jetness

As is apparent from the results shown in Table 1, in an aqueous paint composition containing pellet-like carbon black, it is obtained by mixing a (meth) acrylic acid-based resin or a maleic acid-based resin with a nonionic surfactant. The aqueous paint compositions of Examples 1 to 7 were excellent in the dispersibility and dispersion stability of carbon black. Moreover, the aqueous paint composition of Examples 1-4 and 6-7 including carbon black having a large DBP absorption amount and a high structure as pellet-like carbon black was excellent in jetness. Furthermore, styrene as (meth) acrylic acid resin - acrylic acid copolymer, if the DBP absorption as pelletized carbon black was used containing high structure carbon black and 175cm ^3/100 g Example 1 and 4 6 and 7 were particularly excellent in dispersibility. Furthermore, among these, in Examples 1 and 7 containing carboxymethyl cellulose as a water-soluble resin, the blackness was very excellent.

Claims (5)

  A method for producing an aqueous paint composition, comprising a step of mixing at least pellet carbon black, at least one of a (meth) acrylic resin and a maleic resin, and a nonionic surfactant.   The nonionic surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, sorbitan fatty acid ester, polyoxyalkylene derivative, and glycerin fatty acid ester. A method for producing the aqueous paint composition described in 1. Method for producing a DBP absorption amount of the carbon black is 130 cm ^3/100 g or more, the aqueous paint composition according to claim 1 or 2. Including at least carbon black, at least one of a (meth) acrylic acid-based resin and a maleic acid-based resin, and a nonionic surfactant,
The aqueous paint composition whose DBP absorption amount of the said carbon black is 170 cm < ³ > / 100g or more.   The nonionic surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, sorbitan fatty acid ester, polyoxyalkylene derivative, and glycerin fatty acid ester. An aqueous paint composition as described in 1.