JPH09194756A - New aqueous aluminum pigment composition and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition containing specific aluminum powder, and a phosphorus compound, water and/or a hydrophilic solvent as essential components, excellent in dispersibility and storage stability, and suitable for aqueous metallic inks, etc. SOLUTION: This new aqueous aluminum pigment composition is obtained by grinding (A) atomized aluminum powder and/or aluminum foils in (B) a hydrophobic inactive solvent, treating the obtained flaky aluminum powder with an unsaturated carboxylic acid, removing the component B, and subsequently treating the left treated aluminum powder with (C) a phosphorus compound, and water and/or (D) a hydrophilic solvent. The component C is preferably one or more kinds of compounds selected from phosphoric ester compounds of the formula [R is H, a 8-24C alkyl, an alkenylene, etc.; A is a 2-4C alkylene; (m) is 0-20; R1 is H, an alkyl, an alkenyl, etc.; (n) is 1-10], such as tridecyl acid phosphate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel aqueous aluminum pigment composition suitable for an aqueous metallic ink or an aqueous metallic paint, and a method for producing the same, and more specifically, an aqueous ink and an aqueous paint having low dispersibility in water and pigment. Relates to a novel aqueous aluminum pigment composition having extremely excellent dispersibility and storage stability, and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, in the field of inks and paints, water-based inks and water-based paints containing very little or no organic solvent have been increasingly used as a resource-saving and pollution-free measure. Is coming. In addition, due to the remarkable technological progress of water-based inks and paints, the high-quality finished appearance, which has hitherto been achieved only by solvent-based inks and paints, has become possible with water-based inks and paints. However, in metallic inks and paints containing aluminum pigments, there are still few examples of water-based inks and water-based paints that can be put to practical use.

There are two main reasons for this. One of them is that aluminum pigments are easily corroded in water-based inks and paints. Another reason is that aluminum pigments are wet pulverized with an inert solvent such as mineral spirit due to the problem of dust explosion, so that the inert solvent inevitably remains in the product. For this reason, when dispersing the aluminum pigment containing the inert solvent in water and water-based inks and water-based coatings, it is inevitable that a large amount of surfactant must be used.

Many findings have been disclosed regarding the first corrosion problem. In particular, when metal powder is present in water-based inks and paints, corrosion by water occurs in any of acidic, neutral, basic, or multiple regions based on the properties of various metals, and hydrogen gas is generated. Occur. This is a very serious safety problem in the process of making ink and paint in ink and paint manufacturers, and in the printing and paint processes of printing, automobiles and home appliances manufacturers. In addition, in the following, the corrosiveness of metal powder pigments in water-based inks and paints and the corrosiveness of metal powder pigments when stored alone as metal powder pigments, not as inks and paints, are combined. It is described as storage stability of.

A number of inventions have been disclosed so far in order to improve the storage stability, but unfortunately, no technique which can be put to practical use has been established yet. For example, US Pat.
No. 93,254, a method using a wetting agent such as polyamide, aliphatic amide, fluorine, and silicone, and a method using a perfluorinated alkyl wetting agent described in US Pat. No. 3,926,874, US Japanese Patent No. 4,138,270 discloses a method of using a fatty acid or an alkanolamide of a fatty acid and a nonionic wetting agent, but none of them shows a sufficient improving effect on storage stability, and However, there is a problem that the wetness between the metal powder pigment and water is poor. Further, JP-B-2-15590 discloses a method of using a phosphoric ester of caprolactone for the purpose of suppressing the reaction between a metal powder pigment and water and improving storage stability.
Japanese Examined Patent Publication No. 2-15591 discloses a method of using octylphenyl dihydrogen phosphate and a diethylamine adduct of bis (octylphenyl) hydrogen phosphate for the same purpose.
Further, JP-A-61-47771 discloses a method of using a reaction product of an orthophosphoric acid or phosphoric acid monoester and an epoxy compound in an aqueous coating, which is further disclosed in Japanese Patent Publication No. 2662/1994.
No. 4 discloses a method of using a reaction product of a copolymer of styrene-allyl alcohol, p-tert-amylphenol, and orthophosphoric acid or phosphorus pentoxide as an aqueous paint, but any of them has an improving effect. Which is not sufficient or has a comparatively improved effect, but has a problem that it can be obtained only as a coating composition, not as a metal powder pigment, and can be put to practical use is not.

On the other hand, the present applicant discloses in Japanese Patent Publication No. 60-8057, a very effective method for suppressing the reaction between a metal powder pigment and water by using a specific organic phosphoric acid ester. There is. On the other hand, another problem of dispersibility in water and water based inks and paints is addressed in all disclosed findings by the use of high amounts of surfactant. For example, Japanese Examined Patent Publication No. 60-8057 discloses a water-dispersible aluminum powder paste comprising aluminum powder and a special organic phosphoric acid ester compound and having excellent long-term storage stability. A surface active agent is required as a means for imparting water dispersibility to an aluminum powder that has been surface-treated in advance.

Further, in Japanese Patent Publication No. 59-15153, dimer acid improves the corrosion resistance of metal pigments, but a surfactant is an essential component for imparting water dispersibility. In Japanese Patent Laid-Open No. 55-1036, the generation of hydrogen gas from the metal powder is suppressed by the saturated or unsaturated higher fatty acid. However, by containing an anionic or nonionic surfactant, the metal powder is dispersed in water. It imparts sex. As mentioned above, many technologies have been published for metal powder pigments intended for use in water-based paints or water-based inks, but all of them contain a hydrophobic inert solvent in the metal powder pigments. Therefore, when dispersing the metal powder pigment in water or water-based paint or water-based ink,
A dispersibility-imparting agent such as a surfactant is used together or the surfactant contained in the ink or paint is used for dispersion. However, in that case, the adhesion of the coating film is reduced due to the use of a large amount of a surfactant, and it is difficult to impart sufficient dispersibility itself, and the primary particles cannot be dispersed in the paint or the ink. There arises a problem that the hiding property / coloring property of the coating film is deteriorated.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a novel aqueous aluminum pigment which eliminates the above-mentioned drawbacks of the prior art, and further has excellent storage stability, and
It is an object of the present invention to provide a novel aqueous aluminum pigment excellent in coating film performance.

[0009]

[Means for Solving the Problems] According to the conventional knowledge,
The phosphorus compound as used in the present invention basically exhibits hydrophobicity, and the composition of the above-mentioned aluminum pigment, phosphorus compound, water and / or hydrophilic solvent is contained in a large amount in water and water-based ink and water-based paint. It has been considered that sufficient dispersibility cannot be imparted unless a dispersibility-imparting agent such as the above-mentioned surfactant is used together or the surface activity of the paint or ink is increased. However, according to the findings of the present inventors, by selecting a specific composition, it is possible to impart extremely excellent dispersibility and storage stability in water and water-based inks and water-based coatings without using a surfactant. It turned out to be possible, and as a result, arrived at the present invention.

That is, the present invention is a novel aqueous aluminum pigment composition characterized by containing an aluminum powder treated with an unsaturated carboxylic acid, a phosphorus compound, and water and / or a hydrophilic solvent as essential components. And a manufacturing method thereof. Furthermore, as a preferred embodiment thereof, atomized aluminum powder and / or aluminum foil is crushed in a hydrophobic inert solvent to produce flaky aluminum powder, which is treated with an unsaturated carboxylic acid, and then a hydrophobic inert solvent. Except for the above, the above-mentioned novel aqueous aluminum pigment composition characterized by being treated with the above-mentioned phosphorus compound and water and / or a hydrophilic solvent, wherein the above-mentioned phosphorus compound is represented by the following formula (1): The present invention relates to the above novel aqueous aluminum pigment composition characterized by being one or more selected from phosphoric acid ester compounds, and a method for producing the same.

[0011]

Embedded image

[Wherein R is hydrogen, an alkyl group having 8 to 24 carbon atoms, an alkenyl group, or an alkenyl substituent having 1 to 24 carbon atoms or an aryl group containing at least one alkenyl substituent having 6 to 24 carbon atoms] Represents, and A is 2 to 4 carbon atoms
Represents an alkylene group of, m is 0 to 20, R ₁ and R
May be the same or different and are hydrogen, an alkyl group, an alkenyl group, an aryl group, or R (OA) _m.
(Where R, A and m are as indicated above). n is 1-10. The present invention will be described in more detail below.

The aluminum powder used in the present invention is
Generally, atomized aluminum powder and / or aluminum foil is processed by a method commonly used in the pigment industry, such as a dry ball mill method, a wet ball mill method, an attritor method, or a stamp mill method, and a grinding aid, an inert solvent, etc. It is pulverized in the presence of the solvent to obtain a so-called scaly form, and thereafter, it is obtained through necessary steps such as classification, filtration and mixing. Here, examples of the grinding aid include fatty acids, aliphatic amines, aliphatic amides, and aliphatic alcohols, but oleic acid, stearic acid, stearylamine, etc. are commonly used. However, the present invention is not limited to these. Examples of the inert solvent include mineral spirits, solvent naphtha, toluene, xylene, and the like that exhibit hydrophobicity, and these can be used alone or in combination.

In the present invention, the aluminum powder thus obtained is treated with an unsaturated carboxylic acid, the inert solvent is removed, and the mixture is mixed with a phosphorus compound and / or a hydrophilic solvent. In the aqueous aluminum pigment composition of the present invention, it is possible to contain such an inert solvent exhibiting hydrophobicity, but the weight of the pigment composition is 3% or less, preferably 1% or less, more preferably It is preferably 0.3% or less. When the content exceeds 3%, the dispersibility in water and water-based inks and water-based coatings decreases, and the required amount of surfactant increases.

The particle size of the aluminum powder used in the present invention preferably has a thickness in the range of about 0.01 to 5 μm and a length or width in the range of 1 to about 50 μm. Is. Next, examples of the phosphorus compound useful in the present invention include an inorganic phosphoric acid ester and an acidic organic phosphoric acid ester compound containing a group represented by the formula (2).

[0016]

Embedded image

Examples of the inorganic phosphoric acid include orthophosphoric acid and its condensates, such as pyrophosphoric acid, triphosphoric acid, tetraphosphoric acid and phosphorous acid. Examples of the acidic organic phosphoric acid ester containing a group represented by the formula (2) include compounds represented by the above general formula (1) and salts thereof, and further represented by the formula (2) in the molecule. Examples thereof include phosphoric acid ester compounds derived by reacting a compound containing a group represented by the formula (1) or a mixture of two or more selected from these compounds. Examples of the alkyl group and alkenyl group in R and R ₁ of the general formula (1) are preferably octyl, decyl, tridecyl, lauryl, cetyl, stearyl, oleyl, hexadecyl and the like. Also, R, R
Preferred examples of the aryl group in ₁ are octylphenyl, nonylphenyl, dodecylphenyl, dinonylphenyl, p-tert-amylphenyl and the like.

As A, ethylene, propylene and the like are preferable. If an example is given as a specific compound, the above-mentioned alkyl, alkenyl, and aryl esters of phosphoric acid and esters of alkyl, alkenyl, and aryl groups to which ethylene oxide is added are preferable. The phosphate ester may be either a mono-ester or a di-ester, or a mixture thereof. It may also be a mixture of different types of phosphoric acid ester. For example,
As the acid phosphate compound, octyl acid phosphate, tridecyl acid phosphate, nonylphenyl phosphate and the like can be used. Furthermore, since these phosphorus compounds show acidity in an aqueous solution, it is possible to use inorganic compounds such as ammonium, sodium hydroxide, potassium hydroxide, dibutylamine, triethylamine, monoethanolamine, diethanolamine, triethanolamine, and morpholine. It can be used after being neutralized with an organic basic substance. The phosphorus compound is 0.1 to 20% by weight, preferably 1 to 10% by weight, based on the metal powder.
Used in the range. Here, the amount of phosphorus compound used is
If it is less than 0.1% by weight, the surface protection effect is small, and if it is more than 20% by weight, the water resistance of the coating film obtained from the water-based paint containing the composition tends to be lowered.

The hydrophilic solvent used in the present invention includes:
Ethanol, methanol, butanol, propanol,
Examples thereof include alcohols such as isopropanol, cellosolves such as ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, propylene glycol monoethyl ether, and the like, and one or more of these are used. Further, in the present invention, a surfactant can be used in order to disperse it in water and water-based ink and water-based paint, but it is not essential. Sufficient dispersion can be obtained even when not used. The surfactant is not particularly limited, but a nonionic surfactant is preferable from the viewpoint of storage stability. For example,
Examples include polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether and polyoxyethylene glycol fatty acid ester. These can be added together with the phosphorus compound, water and the hydrophilic solvent.

Next, a method for producing the aluminum pigment composition of the present invention will be described. First, crushed, the method of treating the obtained flaky aluminum powder with an unsaturated carboxylic acid is not particularly limited, for example, the aluminum powder is dispersed in a solvent to perform uniform treatment, unsaturated carboxylic acid is added. It is achieved by The unsaturated carboxylic acid in the present invention means acrylic acid, methacrylic acid,
Itaconic acid, fumaric acid and the like, and one kind or a mixture of two or more kinds thereof is used. The amount used varies depending on the type and properties of the aluminum powder, particularly the surface area, but is generally between 0.01 and 10 parts by weight, and more preferably 0.1 to 5.0 parts by weight, based on the aluminum powder. . If the amount is less than 0.01 parts by weight, the aluminum powder is agglomerated when the inert solvent is removed later, and 10
There is no difference in the effect of suppressing the agglomeration of aluminum powder even if it is used in excess of parts by weight.

The concentration of the aluminum powder in the solvent during the treatment of dispersing the scale-like aluminum powder in the solvent and adding the unsaturated carboxylic acid is not particularly limited.
It is desirable to carry out at 90%. If it is less than 1%, a uniform dispersion can be obtained, but the amount of the solvent to be handled becomes too large, and the labor for removing it later becomes necessary. If it exceeds 90%, the dispersion of the aluminum powder tends to be non-uniform. The above treatment is performed at a temperature of 40 to 150 ° C. for 5 minutes to 10 minutes.
Time is desirable. If the temperature is lower than 40 ° C., the viscosity of the paste is high and it takes time to uniformly disperse the paste.
The evaporation amount of the solvent is large and the concentration of aluminum powder is likely to increase, and it is necessary to take sufficient consideration for steam ignition and the like. If the treatment time is less than 5 minutes, the unsaturated carboxylic acid is likely to be insufficiently dispersed, and if the treatment time exceeds 10 hours, the effect is not increased and only time is required.

Solvents used for the treatment include aliphatic hydrocarbons such as hexane, heptane, octane and mineral spirits, aromatic hydrocarbons such as benzene, toluene, xylene and solvent naphtha, ethers such as tetrahydrofuran and diethyl ether, acetic acid. Ethyl, esters such as butyl acetate, butyl cellosolve, cellosolves such as ethyl cellosolve, methanol, ethanol, propanol,
Examples of alcohols include isopropyl alcohol (IPA) and butanol. Further, the method of removing the hydrophobic inert solvent from the aluminum powder composition thus treated with the unsaturated carboxylic acid is not particularly limited, for example, the above raw materials are charged in a vacuum mixer and mixed under reduced pressure. It is obtained by doing. Further, it may be repeatedly washed with a large amount of hydrophilic solvent.

Finally, after treatment with unsaturated carboxylic acid,
The aluminum powder composition excluding the hydrophobic inert solvent is charged into a mixer or a tank, a phosphorus compound and water and / or a hydrophilic solvent are added, and the mixture is stirred to obtain the aluminum pigment composition of the present invention. To be The order of addition is not particularly limited, but in general, after first treating with an unsaturated carboxylic acid, the aluminum powder composition excluding the hydrophobic inert solvent is added, and then the phosphorus compound and water and / or Stirring efficiency is better when a mixture of hydrophilic solvents is added.

The mixing and stirring temperature is not particularly limited, but in order to sufficiently disperse the phosphorus compound and adsorb it to the aluminum powder composition, 40 ° C. or higher and 100 ° C. or lower, preferably 6
It is preferably 0 ° C or higher and 80 ° C or lower. If it is lower than 40 ° C., it takes time for the phosphorus compound to be uniformly dispersed, and if it exceeds 100 ° C., the amount of water evaporation is large and it becomes difficult to adjust the solid content. The mixing and stirring time is not particularly limited, but is preferably 5 minutes or more and 5 hours or less. If it is less than 5 minutes, the above composition is not uniformly dispersed, and if it exceeds 5 hours, the aluminum particles themselves are deformed, and thus the color tone of the coating film may be significantly changed. In addition, depending on the case, you may incorporate the process of raising solid content by filtering.

[0025]

Embodiments of the present invention will be described below.
It should be noted that the following examples show typical ones for carrying out the present invention, and the present invention is not limited to these. First, the test method and measurement method used will be described. 1. Performance of Aluminum Pigment Composition (1) Storage Stability For the purpose of accelerating and evaluating the storage stability of the aluminum pigment composition, about 100 g of the aluminum pigment composition was placed in a 300 ml tin can, and the lid was covered. Observation of the blistered state of a can after storage for 1 month in a hot air circulation dryer at 50 ° C., and IPA of 5 g of the above sample using a 45 μm sieve.
The dry weight of the residue sieved in (isopropyl alcohol) was measured. This was divided by the heating residue of the sample and expressed as a percentage (weight reduction rate), and evaluated according to the following. Less than 0.02% ・ ・ ・ ◎ 0.02 to less than 0.05% ・ ・ ・ ○ 0.05 to 0.10% ・ ・ ・ △ More than 0.10% ・ ・ ・ ×

(2) Water dispersibility 5 g of the aluminum pigment composition was sampled in a beaker, purified water was added, and predispersion was performed with a spatula. Then 50
It was poured into a cc colorimetric tube, and purified water was added so that the total amount was 40 cc. After vigorously shaking for 1 minute, the mixture was allowed to stand at room temperature, and the sedimentation volume after 30 minutes was measured. The larger the value, the more stable the dispersion state and the better the water dispersibility. (3) Water stability Aluminum pigment composition 2 in a 200 ml Erlenmeyer flask
0 g is collected, 100 ml of purified water is added, and the mixture is shaken vigorously to disperse the sample sufficiently. After adding purified water to a total of 200 cc, attach a measuring pipette with a rubber stopper to the mouth of the flask, immerse in a constant temperature water bath at 60 ° C., and read the amount of gas generated after standing for 24 hours from the scale of the measuring pipette. . Moreover, the following evaluation was made according to the amount of gas generated. Less than 0.5 cc / g ・ ・ ・ ◎ 0.5 to less than 2.0 cc / g ・ ・ ・ ○ 2.0 to 5.0 cc / g ・ ・ ・ △ exceeding 5.0 cc / g ・ ・ ・ ×

2. Aqueous ink and coating film performance An aqueous ink was prepared with the following composition, and (1) storage stability of the ink and (2) coating film appearance were evaluated. Test aluminum pigment composition (heating residue = 65%) 20 parts by weight John Cryl 62 (manufactured by Johnson Polymer Co., Ltd.) 40 〃 John Cryl 711 (〃) 40 〃 Purified water / IPA (= 1/1) 40 〃 (1) Storage stability of ink Put 100 ml of the above ink in a 100 ml Erlenmeyer flask, attach a measuring pipette with a rubber stopper to the mouth of the flask, immerse in a constant temperature water bath at 40 ° C., and change the gas generation amount after leaving for 24 hours. Read from the scale of the measuring pipette. Also,
The same criteria as in the case of 1- (3) Water stability were evaluated according to the amount of gas generated.

(2) Appearance of coating film The above ink was applied onto a PET film with a 3 mil applicator and dried at room temperature for 24 hours to obtain a coated plate. The appearance of the coating film and the amount of transmitted light (hiding power) of the coating film were visually evaluated. It was determined that the greater the amount of transmitted light, the lower the concealability. If the dispersibility in the ink is poor, the pigment will agglomerate,
The hiding power is also low. The hiding power and the presence or absence of aggregates in the coating film were used as indicators of the dispersibility of the aluminum pigment composition in the ink. 3. Aqueous paint and coating film performance An aqueous paint was prepared with the following composition, and (1) storage stability of the paint and (2) coating film appearance were evaluated. Test aluminum pigment composition (heating residue = W%) 2821 / W parts by weight Water-soluble acrylic resin (heating residue = 50%) * 1 370 〃 Water-soluble melamine resin (heating residue = 50%) * 2 100 〃 Purified water 491 〃 Note) * 1: pH adjusted to 9.5 by adding dimethyl ethanolamine to ALMATEX WA-911 (manufactured by Mitsui Toatsu Chemicals, Inc.). * 2: Cymel (manufactured by Mitsui Cyanamid Co., Ltd.) (1) Storage stability of paint Put 100 ml of the above paint in a 100 ml Erlenmeyer flask, attach a measuring pipette with a rubber stopper to the mouth of the flask, and put in a constant temperature water bath at 50 ° C. The amount of gas generated after immersion and standing for 24 hours was read from the memory of the measuring pipette. Also,
The same criteria as in the case of 1- (3) Water stability were evaluated according to the amount of gas generated.

(2) Appearance of coating film The above coating material is spray-painted on a degreased glass plate,
After baking at 30 ° C. for 30 minutes, a coated plate having a dry film thickness of 15 to 20 μm was obtained. The appearance of the coating film and the amount of transmitted light (hiding power) of the coating film were visually evaluated. It was determined that the greater the amount of transmitted light, the lower the concealability. If the dispersibility in the paint is poor, the pigment will agglomerate, and the hiding property will be low. The hiding power and the presence or absence of aggregates in the coating film were used as indices of the dispersibility of the aluminum pigment composition in the coating material. The test aluminum powder composition is adjusted by
The following reference example was followed.

[0030]

[Reference Example 1] (Preparation of scale-like aluminum powder composition) A ball mill having an inner diameter of 34.5 cm and a length of 38.4 cm, a steel ball having a diameter of 3.9 mm, 42 kg, an aluminum atomized powder VA-500 (mountain metal) (stock)
1.4 kg, 1.7 g of mineral spirits and 10 g of stearylamine were added, the mixture was rotated at 60 rpm for 3 hours, 2.8 liters of mineral spirits were added, and the mixture was further rotated for 1 hour and 10 minutes to obtain aluminum. The slurry is washed with mineral spirits, extracted, and a Dalton vibrating screen (manufactured by Sanei Seisakusho Co., Ltd., model 402) fitted with a stainless steel wire mesh with openings of 40 μm
Type) and the underslurry was filtered to obtain a scale-like aluminum powder composition. The metal content of this aluminum powder composition was 74.0% by weight.

[0031]

[Reference Example 2] (Preparation of test aluminum aluminium powder) 400 g of the scale-like aluminum powder composition of Reference Example 1,
Mineral spirit 2.0 liters, acrylic acid 3.0
g in a 4 liter separable flask,
Stir for 4 hours. After squeezing the heating residue to 80% by suction filtration, the mixture was put into a 5 liter universal mixing stirrer (manufactured by Dalton Co., Ltd.) and stirred under reduced pressure at 40 ° C. for 24 hours,
An aluminum powder was obtained. The metal content of this aluminum powder was 99.9% by weight.

[0032]

[Reference Example 3] (Preparation of test aluminum powder) The scale-like aluminum powder composition of Reference Example 1 was placed in a 5 liter universal mixing stirrer (manufactured by Dalton Co.) and stirred under reduced pressure at 40 ° C for 24 hours. Then, aluminum powder was obtained.
The metal content of this aluminum powder was 99.9% by weight.

[0033]

Example 1 100 parts by weight of a metal component of a test aluminum aluminium powder obtained in Reference Example 2 was placed in a 1 liter separable flask, and tridecyl acid phosphate AP-13 was added.
6 parts by weight of (phosphate ester manufactured by Daihachi Chemical Industry Co., Ltd.) and 106 g of purified water were added, and the mixture was stirred at 60 ° C. for 3 hours,
The intended aluminum pigment composition was obtained. The heating residue of this aluminum pigment composition was 50% by weight.

With respect to the obtained aluminum pigment composition, the performances 1, 2 and 3 described above were evaluated, and the results are shown in Table 1.
2 is shown.

[0035]

Comparative Example 1 Example 1 was repeated except that the scale-like aluminum powder composition obtained in Reference Example 1 was used and purified water was 71 g.
An aluminum pigment composition was obtained in the same manner as in. The heating residue of this aluminum pigment composition was 50% by weight, but water and aluminum were separated, and it was not in a uniform state. The performances 1, 2, and 3 of the obtained aluminum pigment composition were evaluated, and the results are shown in Tables 1 and 2.

[0036]

Comparative Example 2 The scale-like aluminum powder composition obtained in Reference Example 1 was used, and 6 parts by weight of a nonionic surfactant was used.
Except that the purified water was 77 g, the same as in Example 1,
An aluminum pigment composition was obtained. The heating residue of this aluminum pigment composition was 50% by weight. The performances 1, 2, and 3 of the obtained aluminum pigment composition were evaluated, and the results are shown in Tables 1 and 2.

[0037]

Comparative Example 3 The scale-like aluminum powder composition obtained in Reference Example 1 was used to evaluate the performances 1, 2 and 3 above, and the results are shown in Tables 1 and 2.

[0038]

[Comparative Example 4] Using the aluminum powder obtained in Reference Example 2,
The performances 1, 2 and 3 described above were evaluated, and the results are shown in Tables 1 and 2.

[0039]

[Comparative Example 5] Using the aluminum powder obtained in Reference Example 3,
The performances 1, 2 and 3 described above were evaluated, and the results are shown in Tables 1 and 2.

[0040]

[Table 1]

[0041]

[Table 2]

[0042]

The aqueous aluminum pigment composition of the present invention is excellent in dispersibility and storage stability and is suitable for aqueous metallic ink or aqueous metallic paint.

Claims (5)

[Claims] 1. A novel aqueous aluminum pigment composition comprising an aluminum powder treated with an unsaturated carboxylic acid, a phosphorus compound, and water and / or a hydrophilic solvent as essential components. 2. Atomized aluminum powder and / or aluminum foil is crushed in a hydrophobic inert solvent to produce scaly aluminum powder, which is treated with an unsaturated carboxylic acid, and then the hydrophobic inert solvent is removed, The novel aqueous aluminum pigment composition according to claim 1, which is treated with a phosphorus compound and water and / or a hydrophilic solvent. 3. The novel compound according to claim 1 or 2, wherein the phosphorus compound is one or more selected from the phosphoric acid ester compounds represented by the following formula (1). Aqueous aluminum pigment composition. Embedded image [Wherein R represents hydrogen, an alkyl group having 8 to 24 carbon atoms, an alkenyl group, or an alkenyl substituent having 1 to 24 carbon atoms or an aryl group containing at least one alkenyl substituent having 6 to 24 carbon atoms, A represents an alkylene group having 2 to 4 carbon atoms, m is 0 to 20, R ₁ and R may be the same or different, and hydrogen, an alkyl group, an alkenyl group, an aryl group, or R (OA) _m (where R,
A and m represent those shown above). n is 1 to 1
0. ] 4. Atomized aluminum powder and / or aluminum foil is crushed in a hydrophobic inert solvent to produce scaly aluminum powder, which is treated with an unsaturated carboxylic acid, and then the hydrophobic inert solvent is removed. The method for producing a novel aqueous aluminum pigment composition according to claim 1, which comprises treating with a phosphorus compound and water and / or a hydrophilic solvent. 5. The novel aqueous aluminum according to claim 4, wherein the phosphorus compound is one kind or two or more kinds selected from the phosphoric acid ester compounds represented by the formula (1). Method for producing pigment composition.