METAL-PARTICLE DISPERSION COMPOSITION AND AQUEOUS COATING COMPOSITION

Abstract

Provided is a metal-particle dispersion composition as a composition containing dispersed metal particles and being suitable for use in aqueous coating compositions, etc., the metal-particle dispersion composition comprising 10-80 mass % metal particles, 0.01-10 mass % organic titanate compound in a chelate form, 1-40 mass % water, and 2-30 mass % organic solvent having a higher boiling point than water, the amounts being based on the whole composition, wherein the organic titanate compound is an organic compound represented by Ti(OR).sub.4 (the OR groups include at least one chelatable substituent based on triethanolamine) and the organic solvent having a higher boiling point than water is a C.sub.7 or lower alcohol compound.

Claims

1. A metal-particle dispersion composition containing, based on the entire composition, 10 to 80 mass % of metal particles, 0.01 to 10 mass % of an organic titanate compound in a chelate form, 1 to 40 mass % of water, and 2 to 30 mass % of an organic solvent having a higher boiling point than water, wherein the organic titanate compound is an organic compound represented by Ti(OR).sub.4, provided that OR groups include at least one chelatable substituent based on triethanolamine, and wherein the organic solvent having a higher boiling point than water is alcohols having 7 or less carbon atoms, and wherein the metal particles include one or more particles selected from among Cr, Cu, SUS304, In, Mn, Sn, Ni, Fe, Ti, V, Ag, and Co.

2. The metal-particle dispersion composition according to claim 1, wherein a metallic material contained in the metal particles is composed of a metal or alloy including an element that satisfies either of being able to form at least one of a water-insoluble oxide and a water-insoluble hydroxide and being insoluble in water with a pH of 8 as a base material.

3. The metal-particle dispersion composition according to claim 1, wherein the OR groups include an alkoxy group and do not include a hydroxyl group.

4. The metal-particle dispersion composition according to claim 3, wherein the OR groups include an alkoxy group having 4 or less carbon atoms and the chelatable substituent based on triethanolamine.

5. The metal-particle dispersion composition according to claim 1, wherein a proportion of the content of the organic titanate compound with respect to the content of the metal particles is 0.5% or more.

6. The metal-particle dispersion composition according to claim 1, wherein a ratio of the number of carbon atoms N.sub.C to the number of hydroxyl groups N.sub.OH in the alcohols is 4 or less.

7. A metal-particle dispersion composition containing, based on the entire composition, 10 to 80 mass % of metal particles, 0.01 to 10 mass % of an organic titanate compound, 1 to 40 mass % of water, and 2 to 30 mass % of an organic solvent having a higher boiling point than water, wherein the organic titanate compound is an organic compound represented by Ti(OR).sub.4, provided that OR groups include at least one substituent based on a pyrophosphate ester, and wherein the organic solvent having a higher boiling point than water has 7 to 20 carbon atoms and has a plurality of ether bonds.

8. The metal-particle dispersion composition according to claim 7, wherein, in the substituent based on a pyrophosphate ester contained in the organic titanate compound, the number of ester groups bonded to each pyrophosphate is 1 or more and 2 or less.

9. The metal-particle dispersion composition according to claim 7, wherein the number of carbon atoms of each ester group bonded to pyrophosphate is 5 or more.

10. The metal-particle dispersion composition according to claim 7, wherein the number of ether bonds contained in the organic solvent having a higher boiling point than water is 3 or more.

11. The metal-particle dispersion composition according to claim 7, wherein the organic solvent having a higher boiling point than water contains a smaller number of hydroxyl groups than the number of ether bonds.

12. An aqueous coating composition including the metal-particle dispersion composition according to claim 1.

Description

EXAMPLES

[0039] While the effects of the present invention have been described below with reference to examples, the present invention is not limited thereto.

Example 1

[0040] A metal-particle dispersion composition containing 3 g of water, 2 g of any organic solvent shown in Table 1, 1 g of any organic titanate compound shown in Table 2, and 3 g of any metal particles shown in Table 3 was prepared (Table 4).

TABLE-US-00001 TABLE 1 Product name, Number etc. Chemical name Production OS-1 Hisolve EDM Diethylene TOHO Chemical glycol ethyl Industry Co., Ltd. methyl ether OS-2 Hisolve MTEM Tetraethylene glycol dimethyl ether OS-3 PrG Propylene glycol AGC Inc. OS-4 DPrG Dipropylene glycol OS-5 PM Propylene glycol Dow Chemical monoethyl ether Japan OS-6 DPM DiPropylene glycol Dow Chemical monoethyl ether Japan OS-7 Ethanol Wako Pure Chemical Industries, Ltd. OS-8 n-Propanol Wako Pure Chemical Industries, Ltd. OS-9 2-Propanol Wako Pure Chemical Industries, Ltd. OS-10 1 -Butanol Wako Pure Chemical Industries, Ltd. OS-11 n-Pentanol Wako Pure Chemical Industries, Ltd. OS-12 2-Pentanol Wako Pure Chemical Industries, Ltd.

TABLE-US-00002 TABLE 2 Product name, Number etc. Chemical name Production OTC-1 Orgatix TA-10 Titanium tetraisopropoxide Matsumoto Fine OTC-2 Orgatix TA-22 Butyl titanate dimer Chemical Co., OTC-3 Orgatix TA-25 Tetra normal butyl titanate Ltd. OTC-4 Orgatix TC-100 Titanium acetylacetonate OTC-5 Orgatix TC-300 Titanium lactate ammonium salt OTC-6 Orgatix TC-315 Titanium lactate OTC-7 Orgatix TC-400 Titanium triethanol aminate OTC-8 Orgatix TC-510 Titanium aminoethyl aminoethanolate OTC-9 Orgatix TC-750 Titanium ethyl acetoacetate OTC-10 TAT Di-n-butoxybis(triethanol Nippon Soda aminate)titanium Co., Ltd. OTC-11 B10 Tetrabutoxy titanium oligomer OTC-12 TOG Titanium-i-propoxyoctylene glycolate

TABLE-US-00003 TABLE 3 Product name, Composition, shape (median Number etc. diameterD50) Production MP-1 Zinc Flake GTT Zn flake (D50 = 13 m, under 45 m ECKART GmbH mesh) MP-2 Cr fine powder 10 m Cr (10 m) Kojundo Chemical Lab. Co., Ltd. MP-3 Cu powder ca. 5 m Cu (5 m) MP-4 Cu powder ca. 1 m Cu (1 m) MP-5 SUS304 powder 150 m SUS304 (under 150 m mesh) pass MP-6 In powder 45 m pass In (45 m) MP-7 Mn powder 45 m pass Mn (45 m) MP-8 Mn fine powder 10 m Mn (10 m) MP-9 Zinc Flake GTT Zn flake (D50 = 13 m, under 45 m ECKART GmbH mesh) MP-10 #350 Sn flake Fukuda Metal Foil & Powder Co., Ltd. MP-11 Ni_Flake Type HCA-1 Ni filament, flake Nikko Rica Corporation MP-12 Al powder ca. 30 m Al amorphous particles Kojundo Chemical Lab. Co., Ltd. MP-13 Fe powder 53 m pass Fe flake approximation (under 53 m mesh) MP-14 Fe powder 3 m~5 m Fe spherical shape (3 m to 5 m) MP-15 Ti powder 45 m pass Ti amorphous mass (under 45 m mesh) MP-16 V powder 75 m pass V amorphous mass (under 75 m mesh) MP-17 Ag powder ca. 1 m Ag spike-like amorphose (1 m) MP-20 M31 (Ag 1 m to 3 m) Ag spike-like amorphose (1 m to 3 m) MP-21 Al powder ca. 3 m Al amorphous particles MP-22 Co fine powder ca. 5 m Co filamentshape (5 m) MP-23 Zn powder 75 m pass Zn spherical shape (under 75 m mesh) MP-24 Zn powder ca. 7 m Zn amorphous particles (7 m) MP-25 Ni_10 m Ni filament flake (10 m)

TABLE-US-00004 TABLE 4 Organic Organic chelate Metal Evaluation solvent compound particles result Outline Example 1-1 OS-3 OTC-1 MP-1 D Comparative Example Example 1-2 OTC-2 E Comparative Example Example 1-3 OTC-3 D Comparative Example Example 1-4 OTC-4 D Comparative Example Example 1-5 OTC-5 D Comparative Example Example 1-6 OTC-6 D Comparative Example Example 1-7 OTC-7 A Example of the present invention Example 1-8 OTC-8 D Comparative Example Example 1-9 OTC-9 D Comparative Example Example 1-10 OTC-10 A Example of the present invention Example 1-11 OTC-11 D Comparative Example Example 1-12 OTC-12 E Comparative Example Example 1-13 OS-1 OTC-7 E Comparative Example Example 1-14 OTC-10 E Comparative Example Example 1-15 OS-2 OTC-7 E Comparative Example Example 1-16 OTC-10 E Comparative Example Example 1-17 OS-4 OTC-7 A Example of the present invention Example 1-18 OTC-10 B Example of the present invention

[0041] The obtained metal-particle dispersion composition was put into a sample bottle (capacity: 14 ml) that can be fitted and sealed with a lid, and stirred in a sealed state for 1 minute under a room temperature environment. After stirring, the sample was left and evaluated according to the following evaluation criteria. The evaluation results are shown in Table 4.

[0042] A: Generation of a gas was not visually observed even when 7 days had passed from when it was left.

[0043] B: Generation of a gas was visually observed within 7 days after 5 days had passed from when it was left.

[0044] C: Generation of a gas was visually observed within 5 days after 4 days had passed from when it was left.

[0045] D: Generation of a gas was visually observed within 4 days from when it was left.

[0046] E: Turbidity was observed in a solution part when it was left, and the organic titanate compound was not appropriately dissolved.

[0047] As shown in Table 4, in a metal-particle dispersion composition according to Example 1-7 containing OTC-7 and a metal-particle dispersion composition according to Example 1-10 containing OTC-10, which were an organic titanate compound having a chelating functional group based on triethanolamine, when an organic solvent composed of alcohols having 6 or less carbon atoms having a higher boiling point than water was used, the organic titanate compound was appropriately dissolved, and even if 5 days or longer had passed from when it was left after stirring, generation of a gas was not observed. Here, in Table 1, in the metal-particle dispersion composition determined as A, even if 200 days or longer had passed from when it was left after stirring, generation of a gas was not observed. Both a metal-particle dispersion composition according to Example 1-7 and a metal-particle dispersion composition according to

[0048] Example 1-10 had a pH of 8, and zinc, which was a base material of metal particles, easily formed a hydroxide (Zn(OH).sub.2) at that pH, and thus it is thought that hydrogen was unlikely to be generated even if stirring was performed.

[0049] Here, while the pH of a metal-particle dispersion composition according to Example 1-8 containing an organic titanate compound of OTC-8 was 8.5, since the organic titanate compound of OTC-8 had a NH2 group at the terminal of the chelating functional group, the solubility in the solvent was relatively low, and there was a possibility of an appropriate protective film not being formed on metal particles. In addition, while the pH of a metal-particle dispersion composition according to Example 1-5 containing an organic titanate compound of OTC-5 was 7.5, the organic titanate compound of OTC-5 was a compound having no alkoxy group and having a hydroxyl group. Therefore, it was not possible to exhibit appropriate solubility in a solvent related to a hydrolysis condensation reaction rate, and there was a possibility of an appropriate protective film not being formed on metal particles

Example 2

[0050] A metal-particle dispersion composition containing 3 g of water, 2 g of any organic solvent shown in Table 1, 3 g of any metal particles shown in Table 3, and any organic titanate compound shown in Table 2 in an amount corresponding to 2 wt % of metal particles was prepared (Table 5). In addition, a metal-particle dispersion composition having the same composition but containing no organic titanate compound was prepared (Table 5).

TABLE-US-00005 TABLE 5 Organic Organic chelate Metal Evaluation solvent compound particles result Outline Example 2-1 OS-3 Not MP-2 D Comparative contained Example Example 2-2 OTC-7 S Example of the present invention Example 2-3 Not MP-3 D Comparative contained Example Example 2-4 OTC-7 S Example of the present invention Example 2-5 Not MP-4 E Comparative contained Example Example 2-6 OTC-7 C Example of the present invention Example 2-7 Not MP-5 S Reference contained Example Example 2-8 OTC-7 S Example of the present invention Example 2-9 Not MP-6 D Comparative contained Example Example 2-10 OTC-7 S Example of the present invention Example 2-11 Not MP-7 D Comparative contained Example Example 2-12 OTC-7 B Example of the present invention Example 2-13 Not MP-8 D Comparative contained Example Exampl 2-14 OTC-7 B Example of the present invention Example 2-15 Not MP-9 E Comparative contained Example Example 2-16 OTC-7 S Example of the present invention Example 2-17 Not MP-10 D Comparative contained Example Example 2-18 OTC-7 S Example of the present invention Example 2-19 Not MP-11 D Comparative contained Example Example 2-20 OTC-7 S Example of the present invention Example 2-21 Not MP-12 D Comparative contained Example Example 2-22 OTC-7 A Example of the present invention Example 2-23 Not MP-13 S Reference contained Example Example 2-24 OTC-7 S Example of the present invention Example 2-25 Not MP-14 D Comparative contained Example Example 2-26 OTC-7 S Example of the present invention Example 2-27 Not MP-15 D Comparative contained Example Example 2-28 OTC-7 S Example of the present invention Example 2-29 Not MP-16 E Comparative contained Example Example 2-30 OTC-7 E Reference Example Example 2-31 Not MP-17 E Comparative contained Example Example 2-32 OTC-7 C Example of the present invention

[0051] The obtained metal-particle dispersion composition was put into a sample bottle (capacity: 14 ml) that can be fitted and sealed with a lid, and stirred in a sealed state for 1 minute under a room temperature environment. After stirring, the sample was left and evaluated according to the following evaluation criteria. The evaluation results are shown in Table 5.

[0052] S: Generation of a gas was not visually observed even when 60 days had passed from when it was left.

[0053] A: Generation of a gas was not visually observed even when 7 days had passed from when it was left.

[0054] B: Generation of a gas was visually observed within 7 days after 5 days had passed from when it was left.

[0055] C: Generation of a gas was visually observed within 5 days after 4 days had passed from when it was left.

[0056] D: Generation of a gas was visually observed within 4 days from when it was left.

[0057] E: Generation of a gas was observed during stirring.

[0058] As shown in Table 5, when OTC-7 as an organic titanate compound having a chelating functional group based on triethanolamine was contained, it was possible to significantly reduce a possibility of generating a gas. Here, when metal particles had a non-conductor forming ability (MP-5), even if OTC-7 was not contained (Example 2-7), there was a possibility of generation of a gas being minimized. In addition, when metal particles were iron particles having a relatively large particle size (MP-13), since a specific surface area of metal particles was relatively small, an area of a new surface generated in the metal-particle dispersion composition due to stirring was relatively small, and even if no OTC-7 was contained (Example 2-23), there was a possibility of generating a gas being minimized. When the base material of metal particles was V (MP-16), if the pH of the metal-particle dispersion composition was 8, V.sub.2O.sub.4, an incomplete oxide of V, was formed together with partially protonated vanadate ions (H.sub.2VO.sub.4.sup.). Therefore, it is thought that gas generation easily occurred. When the base material of metal particles was Ag (MP-17), if OTC-7 was not contained (Example 2-31), a gas was generated from the metal-particle dispersion composition during stirring. Since the pH of the metal-particle dispersion composition was 8, no metal was dissolved based on a general potential-pH diagram, but a large specific surface area may have had an effect because the particle size (median diameter D50) was as small as about 1 m. Even in a state in which the solubility of metal particles increased in this manner, when OTC-7 was contained, it was possible to appropriately minimize generation of a gas from the metal-particle dispersion composition.

Example 3

[0059] A metal-particle dispersion composition containing 3 g of water, 2 g of any organic solvent shown in Table 1, 3 g of any metal particles shown in Table 3, and any organic titanate compound shown in Table 2 in an amount corresponding to 2 wt % of metal particles was prepared (Table 6). In addition, a metal-particle dispersion composition having the same composition but containing no organic titanate compound was prepared (Table 6).

TABLE-US-00006 TABLE 6 Organic Organic chelate Metal Evaluation solvent compound particles result Outline Example 3-1 OS-5 Not MP-9 D Comparative contained Example Example 3-2 OTC-7 S Example of the present invention Example 3-3 OS-6 Not D Comparative contained Example Example 3-4 OTC-7 C Example of the present invention Example 3-5 OS-7 Not D Comparative contained Example Example 3-6 OTC-7 S Example of the present invention Example 3-7 OS-8 Not D Reference contained Example Example 3-8 OTC-7 S Example of the present invention Example 3-9 OS-9 Not D Comparative contained Example Example 3-10 OTC-7 S Example of the present invention Example 3-11 OS-10 Not D Comparative contained Example Example 3-12 OTC-7 S Example of the present invention Example 3-13 OS-11 Not D Comparative contained Example Example 3-14 OTC-7 D Comparative Example Example 3-15 OS-12 Not D Comparative contained Example Example 3-16 OTC-7 B Example of the present invention

[0060] The obtained metal-particle dispersion composition was put into a sample bottle (capacity: 14 ml) that can be fitted and sealed with a lid, and stirred in a sealed state for 1 minute under a room temperature environment. After stirring, the sample was left and evaluated according to the following evaluation criteria. The evaluation results are shown in Table 6.

[0061] S: Generation of a gas was not visually observed even when 60 days had passed from when it was left.

[0062] A: Generation of a gas was not visually observed even when 7 days had passed from when it was left.

[0063] B: Generation of a gas was visually observed within 7 days after 5 days had passed from when it was left.

[0064] C: Generation of a gas was visually observed within 5 days after 4 days had passed from when it was left.

[0065] D: Generation of a gas was visually observed within 4 days from when it was left.

[0066] E: Generation of a gas was observed during stirring.

Example 4

[0067] The following phosphoric acid organic titanate compound was prepared.

[0068] Plenact 38S (commercially available from Ajinomoto Fine-Techno Co., Inc.)

[0069] Isopropoxy tri(dioctyl pyrophosphate)titanate

[0070] Reactive group: (H.sub.3C).sub.2CHO

[0071] Functional group: OP(O)(OH)O(O)(OC.sub.8H.sub.17).sub.2

[0072] Composition active component: 90 wt % or more [0073] 2-propanol: 5 to 10 wt % [0074] Toluene: 1.9 wt %

[0075] Plenact 138S (commercially available from Ajinomoto Fine-Techno Co., Inc.)

[0076] Bis(dioctyl pyrophosphate)oxyacetate titanate

[0077] Reactive group: OC(CH.sub.2O)O

[0078] Functional group: OP(O)(OH)O(O)(OC.sub.8H.sub.17).sub.2

[0079] Composition active component: 90 wt % or more [0080] 2-propanol: 5 to 10 wt % [0081] Toluene: 1.9 wt %

[0082] Plenact 238S (commercially available from Ajinomoto Fine-Techno Co., Inc.)

[0083] Bis(dioctyl pyrophosphate)ethylene titanate

[0084] Reactive group: (CH.sub.2O).sub.2

[0085] Functional group: OP(O)(OH)O(O)(OC.sub.8H.sub.17).sub.2

[0086] Composition active component: 80 to 90 wt % [0087] 2-propanol: 10 to 20 wt % [0088] Toluene: 1.4 wt %

[0089] Plenact 338X (commercially available from Ajinomoto Fine-Techno Co., Inc.)

[0090] Bis(dioctyl pyrophosphate)ethylene titanate

[0091] Reactive group: CH.sub.3(CH.sub.3)(H)C

[0092] Functional group: OP(O)(OH)O(O)(OC.sub.8H.sub.17).sub.2

[0093] Composition active component: 80 to 90 wt % [0094] 2-propanol: 10 to 20 wt [0095] Toluene: 1.5 wt %

[0096] Solvents shown in Table 7 were prepared.

TABLE-US-00007 TABLE 7 Product name Manufacturer Structure Structural formula Hisolve EDE TOHO Diethylene glycol C2H5O Chemical ethyl methyl ether (CH2CH2O)2C2H5 Industry Co., Ltd. Hisolve MPM TOHO Polyethylene glycol C2H5O Chemical dimethyl ether (CH2CH2O)nC2H5 Industry Co., Ltd. Hisolve MTEM TOHO Tetraethylene glycol CH3O (CH2CH2O)4CH3 Chemical dimethyl ether Industry Co., Ltd. Ethyl lactate TOHO Ethyl lactate CH3CH (OH)COOC2H5 Chemical Industry Co., Ltd. PrG AGC Inc. Propylene glycol HOCH2CH (OH)CH3 DPrG AGC Inc. Dipropylene glycol [CH3CH (OH)CH2]2O Dowanol PM Dow Propylene glycol CH3OC3H6OH Chemcial monomethyl ether Co., Ltd. Dowanol DPM Dow DiPropylene glycol CH3O (C3H6O)2H Chemcial monomethyl ether Co., Ltd. Dowanol PnB Dow Propylene glycol C4H9OC3H6OH Chemcial n-butyl ether Co., Ltd. Dowanol PMA Dow Propylene glycol CH3OC3H6OCOCH3 Chemcial monomethyl ether Co., Ltd. acetate Dowanol TPM Dow Tripropylene glycol CH3O (C3H6O)3H Chemcial methyl ether Co., Ltd. Dowanol DPnB Dow DiPropylene glycol C4H9O (C3H6O)2H Chemcial n-butyl ether Co., Ltd. Dowanol PPh Dow Propylene glycol C6H5OC3H6OH Chemcial phenyl ether Co., Ltd. Carbitol LG Dow Diethylene glycol CH3CH2O (CH2CH2O)2H Chemcial monoethyl ether Co., Ltd.

[0097] 0.2 g of Plenact 38S was added to 2 g of any organic solvent shown in Table 7, and properties were observed. The results are shown in Table 8.

TABLE-US-00008 TABLE 8 Product Collection Product Amount name Manufacturer Structure amount name Manufacturer Structure added Hisolve TOHO Diethylene 2 g Plenact Ajinomoto isopropoxy tri 0.2 g EDE Chemical glycol ethyl 38S Fine-Techno (dioctyl Industry Co., methyl pyrophosphate Ltd. ether ester) Hisolve TOHO Polyethylene 2 g MPM Chemical glycol Industry Co., dimethyl Ltd. ether Hisolve TOHO Tetraethylene 2 g MTEM Chemical glycol Industry Co., dimethyl Ltd. ether Ethyl TOHO Ethyl 2 g lactate Chemical lactate Industry Co., Ltd. PrG AGC Inc. Propylene 2 g glycol DPrG AGC Inc. Dipropylene 2 g glycol Dowanol Dow Chemcial Propylene 2 g PM Co., Ltd. glycol monomethyl ether Dowanol Dow Chemcial DiPropylene 2 g DPM Co., Ltd. glycol monomethyl ether Dowanol Dow Chemcial Propylene 2 g PnB Co., Ltd. glycol n-butyl ether Dowanol Dow Chemcial Propylene 2 g PMA Co., Ltd. glycol monomethyl ether acetate Dowanol Dow Chemcial Tripropylene 2 g TPM Co.. Ltd. glycol methyl ether Dowanol Dow Chemcial DiPropylene 2 g DPnB Co., Ltd. glycol n-butyl ether Dowanol Dow Chemcial Propylene 2 g PPh Co., Ltd. glycol phenyl ether Carbitol Dow Chemcial Diethylene 2 g LG Co., Ltd. glycol monoethyl ether Product Immediately After3 After 1 After 2 After 4 After 7 After 18 name after addition hr day days days days days Hisolve EDE (known) Hisolve MPM (known) Hisolve MTEM (known) Ethyl orange lactate PrG x (known) DPrG x (known) Dowanol orange PM Dowanol yellow DPM Dowanol PnB Dowanol PMA Dowanol TPM Dowanol DPnB Dowanol PPh Carbitol LG

[0098] 0.2 g of Plenact 138S was added to 2 g of any organic solvent shown in Table 7, and properties were observed. The results are shown in Table 9.

TABLE-US-00009 TABLE 9 Product Collection Product Amount name Manufacturer Structure amount name Manufacturer Structure added Hisolve TOHO Diethylene 2 g Plenact Ajinomoto Bis(dioctyl 0.2 g EDE Chemical glycol ethyl 238S Fine-Techno pyrophosphate Industry Co., methyl ester)glycol Ltd. ether titanate Hisolve TOHO Polyethylene 2 g MPM Chemical glycol Industry Co., dimethyl Ltd. ether Hisolve TOHO Tetraethylene 2 g MTEM Chemical glycol Industry Co., dimethyl Ltd. ether Ethyl TOHO Ethyl 2 g lactate Chemical lactate Industry Co., Ltd. PrG AGC Inc. Propylene 2 g glycol DPrG AGC Inc. Dipropylene 2 g glycol Dowanol Dow Chemcial Propylene 2 g PM Co., Ltd. glycol monomethyl ether Dowanol Dow Chemcial DiPropylene 2 g DPM Co., Ltd. glycol monomethyl ether Dowanol Dow Chemcial Propylene 2 g PnB Co., Ltd. glycol n-butyl ether Dowanol Dow Chemcial Propylene 2 g PMA Co., Ltd. glycol monomethyl ether acetate Dowanol Dow Chemcial Tripropylene 2 g TPM Co., Ltd. glycol methyl ether Dowanol Dow Chemcial DiPropylene 2 g DPnB Co., Ltd. glycol n-butyl ether Dowanol Dow Chemcial Propylene 2 g PPh Co., Ltd. glycol phenyl ether Carbitol Dow Chemcial Diethylene 2 g LG Co., Ltd. glycol monoethyl ether Product Immediately After3 After 1 After 2 After 4 After 7 After 18 name after addition hr day days days days days Hisolve EDE (known) Hisolve MPM (known) Hisolve MTEM (known) Ethyl ?orange/ yellow/ lactate muddy clear PrG x (known) DPrG x (known) Dowanol orange PM Dowanol yellow DPM Dowanol PnB Dowanol PMA Dowanol light light TPM yellow yellow Dowanol DPnB Dowanol PPh Carbitol light light LG yellow yellow

[0099] 0.2 g of Plenact 238S was added to 2 g of any organic solvent shown in Table 7, and properties were observed. The results are shown in Table 10.

TABLE-US-00010 TABLE 10 Product Collection Product Amount name Manufacturer Structure amount name Manufacturer Structure added Hisolve TOHO Diethylene 2 g Plenact Ajinomoto Bis(dioctyl 0.2 g EDE Chemical glycol ethyl 238S Fine-Techno pyrophosphate Industry Co., methyl ether ester)glycol Ltd. titanate Hisolve TOHO Polyethylene 2 g MPM Chemical glycol Industry Co., dimethyl Ltd. ether Hisolve TOHO Tetraethylene 2 g MTEM Chemical glycol Industry Co., dimethyl Ltd. ether Ethyl TOHO Ethyl lactate 2 g lactate Chemical Industry Co., Ltd. PrG AGC Inc. Propylene 2 g glycol DPrG AGC Inc. Dipropylene 2 g glycol Dowanol Dow Propylene 2 g PM Chemcial glycol Co., Ltd. monomethyl ether Dowanol Dow DiPropylene 2 g DPM Chemcial glycol Co., Ltd. monomethyl ether Dowanol Dow Propylene 2 g PnB Chemcial glycol Co., Ltd. n-butyl ether Dowanol Dow Propylene 2 g PMA Chemcial glycol Co., Ltd. monomethyl ether acetate Dowanol Dow Tripropylene 2 g TPM Chemcial glycol Co., Ltd. methyl ether Dowanol Dow DiPropylene 2 g DPnB Chemcial glycol Co., Ltd. n-butyl ether Dowanol Dow Propylene 2 g PPh Chemcial glycol Co., Ltd. phenyl ether Carbitol Dow Diethylene 2 g LG Chemcial glycol Co., Ltd. monoethyl ether Product Immediately After3 After 1 After 2 After 4 After After 18 name after addition hr day days days 7 days days Hisolve EDE Hisolve MPM Hisolve MTEM Ethyl orange lactate PrG turbid gelationx DPrG turbid gelationx Dowanol orange PM Dowanol yellow DPM Dowanol PnB Dowanol PMA Dowanol light light TPM yellow yellow Dowanol DPnB Dowanol PPh Carbitol light light LG yellow yellow

[0100] 0.2 g of Plenact 338X was added to 2 g of any organic solvent shown in Table 7, and properties were observed. The results are shown in Table 11.

TABLE-US-00011 TABLE 11 Product Collection Product Amount name Manufacturer Structure amount name Manufacturer Structure added Hisolve TOHO Diethylene 2 g Plenact Ajinomoto Bis(dioctyl 0.2 g EDE Chemical glycol ethyl 338X Fine-Techno pyrophosphate Industry Co, methyl ether ester) glycol Ltd. titanate Hisolve TOHO Polyethylene 2 g MPM Chemical glycol Industry Co, dimethyl Ltd. ether Hisolve TOHO Tetraethylene 2 g MTEM Chemical glycol Industry Co, dimethyl Ltd. ether Ethyl TOHO Ethyl lactate 2 g lactate Chemical Industry Co, Ltd. PrG AGC Inc. Propylene 2 g glycol DPrG AGC Inc. Dipropylene 2 g glycol Dowanol Dow Propylene 2 g PM Chemcial glycol Co, Ltd. monomethyl ether Dowanol Dow DiPropylene 2 g DPM Chemcial glycol Co., Ltd. monomethyl ether Dowanol Dow Propylene 2 g PnB Chemcial glycol Co., Ltd. n-butyl ether Dowanol Dow Propylene 2 g PMA Chemcial glycol Co., Ltd. monomethyl ether acetate Dowanol Dow Tripropylene 2 g TPM Chemcial glycol Co., Ltd. methyl ether Dowanol Dow DiPropylene 2 g DPnB Chemcial glycol Co., Ltd. n-butyl ether Dowanol Dow Propylene 2 g PPh Chemcial glycol Co., Ltd. phenyl ether Carbitol Dow Diethylene 2 g LG Chemcial glycol Co., Ltd. monoethyl ether Product Immediately After3 After 1 After 2 After 4 After 7 After 18 name after addition hr day days days days days Hisolve EDE Hisolve MPM Hisolve MTEM Ethyl orange lactate PrG turbid gelationx DPrG turbid gelationx Dowanol orange PM Dowanol yellow DPM Dowanol PnB Dowanol PMA Dowanol TPM Dowanol DPnB Dowanol PPh Carbitol LG

[0101] 0.2 g of a substance represented as OTC-7 in Table 2 was added to 2 g of any organic solvent shown in Table 7, and properties were observed. The results are shown in Table 12.

TABLE-US-00012 TABLE 12 Product Collection Product Amount name Manufacturer Structure amount name Manufacturer Structure added Hisolve TOHO Diethylene 2 g Orgatix Matsumoto diisoproxy 0.2 g EDE Chemical glycol ethyl TC400 Fine titanium Industry Co., methyl ether Chemical bis(triethanol Ltd. Co., Ltd. aminate) Hisolve TOHO Polyethylene 2 g MPM Chemical glycol Industry Co., dimethyl Ltd. ether Hisolve TOHO Tetraethylene 2 g MTEM Chemical glycol Industry Co., dimethyl Ltd. ether Ethyl TOHO Ethyl 2 g lactate Chemical lactate Industry Co., Ltd. PrG AGC Inc. Propylene 2 g glycol DPrG AGC Inc. Dipropylene 2 g glycol Dowanol Dow Propylene 2 g PM Chemcial glycol Co., Ltd. monomethyl ether Dowanol Dow DiPropylene 2 g DPM Chemcial glycol Co., Ltd. monomethyl ether Dowanol Dow Propylene 2 g PnB Chemcial glycol Co., Ltd. n-butyl ether Dowanol Dow Propylene 2 g PMA Chemcial glycol Co., Ltd. monomethyl ether acetate Dowanol Dow Tripropylene 2 g TPM Chemcial glycol Co., Ltd. methyl ether Dowanol Dow DiPropylene 2 g DPnB Chemcial glycol Co., Ltd. n-butyl ether Dowanol Dow Propylene 2 g PPh Chemcial glycol Co, Ltd. phenyl ether Carbitol Dow Diethylene 2 g LG Chemcial glycol Co, Ltd. monoethyl ether Product Immediately After3 After 1 After 2 After 4 After After 18 name after addition hr day days days 7 days days Hisolve X (known) EDE Hisolve X (known) MPM Hisolve X (known) MTEM Ethyl ? ? ? x lactate yellow/ yellow/ yellow/ yellow/ turbid turbid turbid turbid PrG (known) DPrG (known) Dowanol ? PM yellow/ yellow/ turbid clear Dowanol ? DPM yellow/ yellow/ turbid clear Dowanol PnB Dowanol ? turbid ? turbid ? turbid xturbid PMA Dowanol light light TPM yellow yellow Dowanol DPnB Dowanol PPh Carbitol light light LG yellow yellow

Example 5

[0102] A metal-particle dispersion composition containing 3 g of water, 2 g of any organic solvent shown in Table 7, 1 g of any of the above phosphoric acid organic titanate compounds, and 3 g of metal particles represented as MP-1 in Table 3 was prepared. The metal-particle dispersion composition obtained in this manner was put into a sample bottle (capacity: 14 ml) that can be fitted and sealed with a lid, and stirred in a sealed state for 1 minute under a room temperature environment. After stirring, the sample was left and observed on a daily basis and stability was evaluated. The evaluation results are shown in Table 13 to Table 15. In Table 13 to Table 15, a result with a numerical value indicated as finished means that decrease in stability was confirmed after storage for the number of days indicated by the number, and evaluation was completed. On the other hand, the expression ongoing means that no decrease in stability was observed even after storage for the number of days (34 days, 35 days) shown in Table 13 to Table 15.

Example 6

[0103] A metal-particle dispersion composition containing 3 g of water, 2 g of Hisolve MTEM shown in Table 7, 3 g of any metal particle shown in Table 3, and 0.2 g of Plenaet 38S or Plenact 238S was prepared (Table 16 to Table 19). In addition, a metal-particle dispersion composition having the same composition but containing none of Plenact 38S and Plenact 238S was prepared (Table 16 to Table 19).

TABLE-US-00013 TABLE 16 Organic Organic chelate Metal Evaluation Confirmation solvent compound particles result date OS-2 Not contained MP-20 Generated 1 Plenact 38S Generated 1 Not contained MP-17 Generated 1 Plenact 38S Generated 4 Not contained MP-12 Generated 2 Plenact 38S Not generated 21 Not contained MP-21 Generated 4 Plenact 38S Generated 8 Not contained MP-22 Generated 0.5 Plenact 38S Not generated 21 Not contained MP-2 Generated 0.5 Plenact 38S Generated 1 Not contained MP-3 Generated 0.5 Plenact 38S Not generated 21 Not contained MP-4 Generated 0.5 Plenact 38S Not generated 22 Not contained MP-13 Generated 11 Plenact 38S Not generated 21 Not contained MP-14 Generated 2 Plenact 38S Not generated 21 Not contained MP-5 Generated 11 Plenact 38S Not generated 21

TABLE-US-00014 TABLE 17 Organic Organic chelate Metal Evaluation Confirmation solvent compound particles result date OS-2 Not contained MP-6 Generated 1 Plenact 38S Not generated 21 Not contained MP-7 Generated 0.5 Plenact 38S Generated 6 Not contained MP-8 Generated 11 Plenact 38S Generated 4 Not contained MP-16 Generated 0 Plenact 38S Not generated 5 Not contained MP-23 Generated 0.5 Plenact 38S Generated 5 Not contained MP-9 Generated 0 Plenact 38S Not generated 34 Not contained MP-24 Generated 4 Plenact 38S Not generated 21 Not contained MP-25 Generated 2 Plenact 38S Not generated 21 Not contained MP-10 Generated 3 Plenact 38S Not generated 21 Not contained MP-15 Generated 3 Plenact 38S Not generated 21

TABLE-US-00015 TABLE 18 Organic Organic chelate Metal Evaluation Confirmation solvent compound particles result date OS-2 Not contained MP-17 Generated 1 Plenact 238S Generated 4 Not contained MP-12 Generated 2 Plenact 238S Not generated 21 Not contained MP-21 Generated 4 Plenact 238S Not generated 21 Not contained MP-22 Generated 0.5 Plenact 238S Not generated 21 Not contained MP-2 Generated 0.5 Plenact 238S Generated 4 Not contained MP-3 Generated 0.5 Plenact 238S Not generated 21 Not contained MP-4 Generated 0.5 Plenact 238S Not generated 21 Not contained MP-13 Generated 11 Plenact 238S Not generated 21 Not contained MP-14 Generated 2 Plenact 238S Not generated 21 Not contained MP-5 Generated 11 Plenact 238S Not generated 21

TABLE-US-00016 TABLE 19 Organic Organic chelate Metal Evaluation Confirmation solvent compound particles result date OS-2 Not contained MP-6 Generated 1 Plenact 238S Not generated 21 Not contained MP-7 Generated 0.5 Plenact 238S Generated 6 Not contained MP-8 Generated 11 Plenact 238S Not generated 21 Not contained MP-16 Generated 0 Plenact 238S Generated 0 Not contained MP-23 Generated 0.5 Plenact 238S Generated 11 Not contained MP-9 Generated 0 Plenact 238S Generated 19 Not contained MP-24 Generated 4 Plenact 238S Not generated 21 Not contained MP-25 Generated 2 Plenact 238S Not generated 21 Not contained MP-10 Generated 3 Plenact 238S Not generated 21 Not contained MP-15 Generated 3 Plenact 238S Not generated 21

[0104] The obtained metal-particle dispersion composition was put into a sample bottle (capacity: 14 ml) that can be fitted and sealed with a lid, and stirred in a sealed state for 1 minute under a room temperature environment. After stirring, the sample was left, and it was checked whether generation of a gas was visually observed. When generation of a gas was confirmed, the column of the evaluation result in Table 16 to Table 19 was set as generated, and the column of confirmation date was set as 0. After 12 hours from when it was left, it was visually checked whether generation of a gas was observed. When generation of a gas was confirmed, the column of the evaluation result in Table 16 to Table 19 was set as generated, and the column of confirmation date was set as 0.5. Thereafter, generation of a gas was visually checked once a day, and when generation of a gas was confirmed, the column of the evaluation result in Table 16 to Table 19 was set as generated, and the number of days since it was first left until generation of a gas was confirmed is shown in the column of confirmation date. When no generation of a gas was confirmed even after a predetermined number of days had passed, the column of the evaluation result in Table 16 to Table 19 was set as not generated, and the column of confirmation date indicates the number of days since it was first left before the final confirmation date.

[0105] Table 20 shows the calculation results of the solubility from the solubility product of various metal elements.

TABLE-US-00017 TABLE 20 Solubility product (Chemical Calculated Type of Assumed phosphate Handbook Revised solubility element Structure Mw 2nd Edition) mol/L g/L Ag Ag.sub.3PO.sub.4 418.58 1.30E20 4.77E08 Al AlPO.sub.4 121.95 3.90E11 7.62E04 Co Co.sub.3 (PO.sub.4) 366.73 1.80E35 1.56E15 Cr CrPO.sub.4.Math.4H.sub.2O 218.97 2.40E23 1.07E09 Cu Cu.sub.3 (PO.sub.4).sub.2 380.59 1.30E37 1.37E16 Fe FePO.sub.4 150.82 1.30E22 1.72E09 Fe.sub.3 (PO.sub.4)28H.sub.2O 501.6 SUS304 In InPO.sub.4 209.79 2.20E22 3.11E09 Mn MnPO.sub.4.Math.H.sub.2O 167.9 V V.sub.3 (PO.sub.4).sub.5 627.7 Zn Zn.sub.3 (PO.sub.4).sub.2 386.08 9.10E33 3.68E14 Zn.sub.3 (PO.sub.4).sub.2.Math.4H.sub.2O 458.2 Ni Ni.sub.3 (PO.sub.4).sub.2 366.01 5.30E31 2.66E13 Ni.sub.3 (PO.sub.4).sub.2.Math.8H.sub.2O 510.1 Sn SnHPO.sub.4 214.7 Ti Ti.sub.3 (PO.sub.4).sub.4 523.5

[0106] In addition, Table 21 shows literature data related to the solubility.

TABLE-US-00018 TABLE 21 Determination of solubility (Chemical Type of Assumed phosphate Handbook Revised 5th element Structure Mw Edition) Ag Ag.sub.3PO.sub.4 418.58 Poorly soluble Al AlPO.sub.4 121.95 Insoluble Co Co.sub.3 (PO.sub.4) 366.73 Insoluble Cr CrPO.sub.4.Math.4H.sub.2O 218.97 Insoluble Cu Cu.sub.3 (PO.sub.4).sub.2 380.59 Insoluble Fe FePO.sub.4 150.82 Poorly soluble Fe.sub.3 (PO.sub.4)28H.sub.2O 501.6 Insoluble SUS304 In InPO.sub.4 209.79 Mn MnPO.sub.4.Math.H.sub.2O 167.9 Insoluble V V.sub.3 (PO.sub.4).sub.5 627.7 Zn Zn.sub.3 (PO.sub.4).sub.2 386.08 Zn.sub.3 (PO.sub.4).sub.2.Math.4H.sub.2O 458.2 Insoluble Ni Ni.sub.3 (PO.sub.4).sub.2 366.01 Ni.sub.3 (PO.sub.4).sub.2.Math.8H.sub.2O 510.1 Insoluble Sn SnHPO.sub.4 214.7 Insoluble Ti Ti.sub.3 (PO.sub.4).sub.4 523.5