JPS6361982B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a slurry thermosetting water-dispersed resin coating composition. Specifically, the present invention is directed to preventing the occurrence of cracks (during heating, foaming of the film mainly due to rapid evaporation of the dispersion medium and the occurrence of pinholes, small holes, etc. caused by this) and cracks during film formation by heating. without smoothness or other physical
A slurry thermosetting water dispersion resin coating composition (hereinafter referred to as "slurry coating") with improved particle settling and redispersibility that forms a coating film with excellent chemical properties such as water resistance, moisture resistance, and corrosion resistance. ”)
Regarding. BACKGROUND ART In recent years, there has been a demand for pollution-free and resource-saving paints and coatings, and slurry paints have been developed as one suitable for this purpose, and efforts are being made to put them into practical use. For example, Japanese Patent Application Laid-open No. 48-45529 discloses a method of coating a slurry made by uniformly suspending a water-insoluble powder coating in water, and uses various film-forming materials (acrylic resin) as a base for powder particles. , alkyd resin, vinyl resin, polyester, nylon, epoxy resin, etc.). This type of slurry-like water-suspended resin generally has a particle size of 1 to 100.
Because it is made by dispersing micron-sized resin powder at a solid content concentration of 20 to 70% by weight in a medium mainly composed of water, it is free from environmental pollution and toxicity caused by organic solvents, and is applied using ordinary liquid paints. It has the advantage that it can be applied and a relatively thick finish can be obtained with one coating. Furthermore, since a large amount of water-soluble surfactant is not used in its constituent components, the film has excellent water resistance, moisture resistance,
It also has good chemical resistance. However, it has been pointed out that the water-dispersed slurry resin having such advantages also has the following disadvantages due to its nature. The most notable of these is the use of relatively large amounts of water-soluble thickeners, inorganic pigment (including extender pigment) dispersions, water-soluble resins, etc. in order to suspend resin particles in water in a stable dispersion state. This is something I had to do. For example, Japanese Patent Publication No. 55-4149 and No. 55-4149
Publication No. 4150 discloses an aqueous dispersion coating composition containing an aqueous resin or an aqueous resin having an auxiliary chemically reactive group, but these compositions are not satisfactory in terms of water resistance and moisture resistance. Moreover, due to the coexistence of an aqueous resin, sedimentation of resin particles in an aqueous dispersion system was observed, resulting in insufficient dispersion stability. Furthermore, an example of blending a hydrophilic ultrafine particulate inorganic compound (i.e., the above-mentioned inorganic pigment) into a water-dispersed resin system is also introduced in Japanese Patent Publication No. 55-4342. Unavoidable disadvantages include inhibiting the melt flowability of the resin and reducing the smoothness, gloss, etc. of the coating. Additionally, there was a problem in that the coating film was prone to cracking and wrinkles during heating and forming. In order to solve these problems, for example, JP-A-54-132630 discloses an example of adding polyethylene glycol with an average molecular weight of 200 to 10,000 to a specific thermosetting resin powder. In addition, the slurry paint is unsatisfactory in terms of particle sedimentation and redispersibility, as well as long-term storage stability. Regarding the formulation of water-soluble resin, a slurry paint described in Japanese Patent Publication No. 55-433 is known as a special example in which scale-like aluminum pigment is added, but the purpose of obtaining a high-brightness coating film is Therefore, it can be said that the above-mentioned defects are built in. In addition, as a method to solve the painting and manufacturing problems peculiar to slurry paints,
There are techniques proposed in Japanese Patent Publication No. 144442, Japanese Patent Publication No. 55-4341, etc., and US Pat. Discloses a method for producing a homogeneous, thin, adhesive, non-porous Lutzker film by applying to a metal surface a suspension of a long-term shelf-stable aqueous composition comprising an aminococonut fatty acid oxetylate wetting agent. Specifically, the stability of the dispersed resin particles in the system, such as particle settling and redispersibility, the melt flowability of the resin during heating and film formation, such as the occurrence of cracks and wrinkles, and the physical and chemical properties of the cured coating film. There is nothing to suggest about the problem of the present invention, which aims to simultaneously solve various problems such as properties such as smoothness of the coated surface, water resistance, humidity resistance, corrosion resistance, etc. The present inventors have achieved a stable dispersion state of thermosetting resin particles, promoting melt fluidity of thermosetting resin particles during heating film formation, and at the same time improving coating surface smoothness, water resistance, moisture resistance, etc. As a result of extensive searches for additives (hereinafter simply referred to as "flow aids") that have little negative impact on paint film performance, we have found that in the technical field of slurry paints, we have achieved extremely unique effects not found in conventional technology. HLB8.5 as flow aid
By using the following water-insoluble or water-dispersible nonionic surfactants, we have been able to solve the above problems. That is, the present invention provides thermosetting resin particles that are water-insoluble and solid at room temperature (hereinafter abbreviated as "resin particles").
and a water-insoluble or water-dispersible nonionic surfactant with an HLB of 8.5 or less, which is a fluidity aid, in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the particles, and dispersed in an aqueous medium. It is. Conventionally, water-soluble surfactants such as nonionic surfactants have been used exclusively as dispersion aids when dispersing solid components such as resin powders and pigments in water in the technical field of slurry coatings. Attention has been paid only to the distributed function in .
As a result of various studies, the present inventors have discovered that a specific nonionic surfactant has a significant effect on the melt fluidity of resin particles during the coating film formation process of a slurry paint. In the present invention, by using a water-insoluble or water-dispersible nonionic surfactant with an HLB of 8.5 or less in a thermosetting powder slurry system, it is possible to improve the slippage between resin particles during heating after coating, and to When the surfactant is compatible with the resin component, it can provide a plasticizing effect, which further improves the melt flowability of the resin particles.
The smoothness of the painted surface can be significantly improved. Another advantage is that if the surfactant is used in an appropriate amount, it will hardly have any adverse effect on the properties such as water resistance, moisture resistance, and corrosion resistance after the coating film is formed. HLB is currently widely used as an indicator of the hydrophilic/lipophilic balance in nonionic surfactant molecules. It is assumed that the hydrophilic portion in the molecule is mainly polyoxyethylene and polyhydric alcohol, and when they are present in the molecule in an amount of W% by weight, it can be expressed as HLB=W/5. When the HLB of the nonionic surfactant calculated by the above formula is 12 to 14, it is understood that the hydrophilicity and lipophilicity are almost balanced, and when it is 12 or less, the degree of lipophilicity increases. That is, the nonionic surfactant used in the slurry paint of the present invention has its properties in the lipophilic region. The HLB of the nonionic surfactant, which is a fluidity aid used in the present invention, is 8.5 or less, preferably 8 or less. If the HLB exceeds 8.5, it is not preferable because even if it is water-dispersible, it acts strongly as a hydrophilic substance and has an adverse effect on the water resistance, moisture resistance, etc. of the cured coating film. In the present invention, the nonionic surfactant as a fluidity aid can be used without particular quantitative restrictions for the purpose of improving the melt fluidity of the resin particles, but preferably 0.1 parts by weight per 100 parts by weight of the resin particles. ~Ten
The amount added is preferably 0.5 to 5 parts by weight, more preferably 0.5 to 5 parts by weight. If the amount is less than 0.1 part by weight, the fluidity improving effect tends to decrease, and if it exceeds 10 parts by weight, it may tend to affect the water resistance, moisture resistance, etc. of the cured coating film. Furthermore, if the nonionic surfactant has a low HLB and is insoluble in water, it is necessary to use a trace amount of a water-soluble surfactant in combination and disperse it in water. As such water-soluble surfactants, nonionic surfactants are preferred, but cationic surfactants, anionic surfactants, amphoteric surfactants, etc. can also be used depending on the case. It is preferable to use as little water-soluble surfactant as possible.
Specifically, 0.01 to 1.0 per 100 parts by weight of resin particles.
The range is in parts by weight. If it is less than 0.01 part by weight, the water dispersion effect will be small, and if it is more than 1.0 part by weight, the water resistance, moisture resistance, etc. of the coating film will likely be impaired. Note that the water-soluble surfactant described above is used not only for water dispersion of the nonionic surfactant as a fluidity aid, but also as a dispersion aid for resin particles in an aqueous medium. Specific examples of these water-soluble surfactants will be described later. Specific examples of nonionic surfactants that can be used as fluidity aids include polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, and polyoxyethylene sorbitan fatty acid ester with an HLB of 8.5 or less. , polyoxyethylene alkyl phosphates, alkyl phosphates, polyoxyethylene castor oil derivatives, glycerin monofatty acid esters, sorbitan fatty acid esters, and the like. The resin particles used in the present invention are particles made of a thermosetting resin that is insoluble in water and solid at room temperature, and
Any material may be used as long as it has the ability to form a coating film, and any resin particles commonly used as powder coatings can be used without particular limitation, and may also contain pigments and the like. That is, after being applied, it is cured by heating to form a coating film having a predetermined performance, and if necessary, ordinary curing agents, pigments,
Resin particles of film-forming resins containing additives, fillers, etc. can be used. Note that the resin particles in the present invention include not only those made only of a thermosetting resin but also those containing pigments and the like as described above. The glass transition temperature and melting point of the resin particles in the present invention are determined by coating performance and dispersion stability, and the values differ depending on the type of coating film-forming resin. In the case of the slurry-like paint of the present invention, the dispersion stability is very good due to the addition of the fluidity aid described above, so it is possible to use a slurry-like paint with a relatively low glass transition temperature or low melting point. It is preferably solid and has a softening temperature of 30 to 120°C. If the softening temperature is below 30°C, resin particles tend to fuse together, and after being made into a paint, it undergoes a gel-like change during storage, making it unstable and undesirable for use. Further, if the softening temperature is 120° C. or higher, it is difficult to obtain good coating surface smoothness even if a large amount of the fluidity aid is used, which is not preferable. The particle size of the resin particles in the present invention is suitably an average particle size of 3 to 50 microns in an aqueous medium. When the average particle size is less than 3 microns, the apparent paint viscosity increases due to increased thixotropy of the system. Therefore, if the viscosity is adjusted to an appropriate level during use, for example, during spray painting, the solid content will be low, making it difficult to finish with a thick film. Moreover, if the average particle size is 50 microns or more, it is not preferable because the smoothness of the coated surface after heating film formation decreases. Furthermore, the average particle size is preferably 30 microns or less to prevent clogging of spray guns and the like. The average particle size is measured using an optical microscope or a centrifugal sedimentation light transmission type particle size distribution analyzer, and is calculated as the arithmetic mean directional diameter per particle. Specific examples of the film-forming resin constituting the resin particles used in the present invention include epoxy resins, epoxy/polyester resins, polyester resins,
Examples include thermosetting resins such as acrylic resins and polyurethane resins. The aqueous medium used in the present invention has water as a main component and contains one or more of the above-mentioned water-soluble surfactants, hydrophilic solvents, water-soluble thickeners, inorganic pigments, and fluidity enhancers. I can do it. Such an aqueous medium can be used without any particular quantitative restriction as long as it provides appropriate fluidity or viscosity to the slurry coating, but it is preferably used in an amount per 100 parts by weight of resin particles.
A range of 40 to 400 parts by weight is employed. The water-soluble surfactants added to the aqueous medium in the present invention include nonionic, anionic, cationic, and amphoteric surfactants, and include resin particles.
It is appropriate to use it in a range of 0.01 to 1.0 parts by weight per 100 parts by weight. Among these water-soluble surfactants, examples of anionic surfactants include alkyl sulfate salts,
Examples include polyoxyethylene alkyl ether sulfate ester salt, alkyl sulfosuccinate, N-acyl sarcosine salt, β-naphthalene sulfonic acid formalin condensate salt, and the like. Examples of cationic surfactants include quaternary ammonium salts, pyridinium salts, and the like. Examples of nonionic surfactants include sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene alcohol ether, glycerin fatty acid ester, polyoxyethylene castor oil derivative, Polyoxyethylene alkyl phenyl ether, alkyl phosphate ester,
Examples include polyoxyethylene phosphate ester, polyoxyethylene/polyoxypropylene block polymer, fatty acid alkylolamide, and the like. In order to further improve the storage stability of the slurry coating material of the present invention, a known hydrophilic solvent may be added in an amount of 0.01 to 5 parts by weight per 100 parts by weight of water. The hydrophilic solvent is preferably one that has no solubility in the resin particles at room temperature and has a boiling point of 180°C or higher; examples thereof include ethylene glycol, diethylene glycol, triethylene glycol,
Examples include propylene glycol/dipropylene glycol, 1,4-butanediol, 1,3-butylene glycol, hexylene glycol, dipropylene glycol, tripropylene glycol, pentanediol, and peptanediol. In the present invention, the aqueous medium is added to 100 parts by weight of resin particles in order to prevent the paint film from slipping off, improve particle settling properties of slurry paint, and improve storage stability.
A known water-soluble thickener can be added in an amount of 0.01 to 1.0 parts by weight. If the amount added is less than 0.01 part by weight, the effect will not be sufficient, and if the amount added is more than 1.0 part by weight, the coating film performance, especially the gloss, will decrease.
Smoothness deteriorates. Examples of such water-soluble thickeners include alkali salts of carboxyl group-containing acrylic copolymers, polyvinylpyrrolidone, polyacrylamide, cellulose derivatives, and polyethylene oxide (preferably those with a molecular weight of 30,000 or more). In order to prevent the paint film from slipping off and further improve the storage stability of the slurry paint, the aqueous medium used in the present invention contains 0.01 to 0.0% per 100 parts by weight of the resin particles.
A known inorganic pigment can be added in an amount of 3.0 parts by weight. For example, fine powder of silica, aluminum oxide, calcium carbonate, clay, bentonite, talc, etc. can be blended. If these are added in an amount of 0.01 part by weight or less, there will be no effect, and if the amount is 3.0 parts by weight or more, the coating will not be effective. This is not preferable because it reduces the gloss of the film and also impairs the melt fluidity of the resin. As the fluidity enhancer added to the aqueous medium in the present invention, ethylene oxide or propylene oxide adducts of symmetrical diols having a molecular weight of 90 to 300 are used. The molecular weight of diols used as fluidity enhancers is 90.
The following exhibits properties similar to polyethylene glycol and is unfavorable in terms of coating performance, particularly water resistance and moisture resistance. Furthermore, if the molecular weight is 300 or more, surfactant-like properties become strong, resulting in a decrease in water resistance and moisture resistance of the coating film, which is not preferable. The preferred molecular weight range is
It is 150-250. Examples of diols in ethylene oxide or propylene oxide adducts of symmetric diols having a molecular weight of 90 to 300 include bisphenol A;
Cyclohexane 1,4-diol, n-butane 1,4-diol, n-pentane 1,5-diol, n-hexane 1,6-diol, 1,4-dimethyl/n-butane 1,4-diol, 1 ,4-
Diethyl n-butane 1,4-diol, 3,6-
dimethyl 4-octyne 3,6-diol, 2,
4,7,9-tetramethyl-5-decyne 4,7-
Diols and the like can be mentioned. Particularly preferred are 3,6 dimethyl 4-octyne 3,6-diol and 2,4,7,9-tetramethyl-5-decyne 4,7-diol. Examples of the ethylene oxide or propylene oxide adducts of the diols include: 4 to 100 moles of ethylene oxide or propylene oxide were added per mole of symmetrical diol such as (Number of moles of ethylene oxide added: N=x+y) Compounds having a structure in which the diol moiety forms a hydrophobic chain are preferred. Among the above-mentioned symmetrical diols, those having an acetylene bond and their adducts with ethylene oxide have already been comprehensively described in the "Painting and Paints" magazine (February 1978 issue). It also outlines examples of anti-foaming properties and paint film repellency (wetting) for thermosetting acrylic emulsions and water-soluble air-drying alkyd primers; Regarding the solution of the specific problem of the present invention in the system, no description can be found that is sufficient to suggest it. When the number of moles of ethylene oxide or propylene oxide added to the diols is 4 or less, the solubility in water decreases, making it difficult to use. Furthermore, if 100 mol or more is added, it becomes almost the same as polyethylene glycol or polypropylene glycol, and the coating film performance deteriorates, which is undesirable. Preferably it is 10 to 50 moles. Note that propylene oxide adducts of the diols have slightly weaker hydrophilicity than ethylene oxide adducts, and may tend to be poorly soluble in water in some cases, so it is preferable to use ethylene oxide adducts. It is desirable to use them together and to add a dispersion process using an attritor or the like after adding them to the resin particles. The amount of fluidity enhancer added varies somewhat depending on its type, but it can be used in the range of 1 to 20 parts by weight per 100 parts by weight of the resin particles, and if it is less than 1 part by weight, the dispersion stability may be slightly reduced. It only shows a tendency to improve, but the fluidity increasing effect is insufficient. Also, 20
If more than 1 part by weight is used, there is a tendency for coating film performance to deteriorate, which is undesirable. 2 for 100 parts by weight of resin flow
It is preferable to use it in a range of 10 parts by weight. A known surface tension modifier (also referred to as a coating surface modifier) may be added to the slurry paint of the present invention in an amount of 1% by weight or less based on water to prevent repelling of the paint film. Examples of the surface tension modifier include surface tension modifiers commonly used in water-based paints, such as acrylic oligomers and silicone oil. In producing the resin particles in the present invention,
A process is employed in which the raw resin composition is heated, melted and kneaded, cooled and then pulverized, or dissolved in a solvent and then dispersed and mixed, and then the resin composition from which the solvent has been removed is pulverized. In the present invention, in order to disperse resin particles in an aqueous medium, HLB8.5 is used as the pulverized particles and a fluidity aid.
The following aqueous dispersion of a nonionic surfactant is mixed in an aqueous medium and dispersed using a conventional dispersion method such as a ball mill, sand mill, or attritor until a predetermined particle size is obtained. As explained above, according to the slurry-like paint of the present invention, by using a fluidity aid that is a nonionic surfactant with an HLB of 8.5 or less, particle settling properties and redispersibility of the slurry-like paint can be improved. is significantly improved compared to conventional slurry paints, thus improving long-term storage, painting workability, etc., and improving the melt flowability of the resin during coating film formation under heating of slurry paints. As a result, there are no cracks or wrinkles, and at the same time, the cured coating film has improved coating properties such as smoothness, water resistance, moisture resistance, and corrosion resistance. Effects can be obtained. The present invention will be further explained below with reference to Examples and Comparative Examples. In the examples, parts and % represent parts by weight and % by weight, respectively. Examples 1 to 13 and Comparative Example 1 After dry blending each raw material with the following formulation, melt-kneading at about 100 ° C using an extruder,
Then, after cooling, it is crushed. This is classified and the particle size is 30~
100 micron polyester thermosetting resin particles (glue) were produced. Hydroxyl functional polyester resin Note ¹⁾ 80 parts Blocked isocyanate curing agent Note ²⁾ 20 Titanium oxide (rutile type) 48 Carbon black 2 Organotin catalyst 1 Painted surface conditioner 1 152 Note 1) Yokohama Kasei Co., Ltd. Product sold by the company, product name URALAC P-2504, softening temperature 96℃ Note 2) Product of Fueva Chemical Company, product name ADDUCT B-989 (1) Production of slurry paints A to F For 100 parts of the above resin particles, 0.1 part of water-soluble nonionic surfactant (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., trade name: Neugen ET-143) and 100 parts of deionized water.
A coarsely dispersed slurry liquid was prepared. An aqueous dispersion of polyoxyethylene monooleate having an HLB of 8.4 as a fluidity aid was prepared using the following formulation (parts).

[Table] Add 50 parts each of the fluidity aid aqueous dispersions of A to F above to 1 part of 200. Six types were created. During the production process, particle size was measured using a microscope, and the dispersion process using an attritor was appropriately adjusted so that the particle size range was 15 to 35 microns and the average particle size was about 25 microns. (2) Production of slurry-like paints G to J Aqueous dispersions G to J were prepared by mixing polyoxyethylene dilauric acid ester with HLB 6.6 as a fluidity aid in the following proportions (parts).

[Table] For 200.1 parts of the above coarsely dispersed slurry liquid, 50, 50,
60 and 70 parts were added to prepare slurry paints G to J in the same manner as in (1) above. (3) Production of slurry-like paints K, L, and M Polyoxyethylene nonyl phenyl ether of HLB 5.7 as a fluidity aid was mixed into aqueous dispersions K to M using the following proportions (parts).

[Table] As for the water dispersion method, the fluidity aid and Neugen ET-143 were mixed, and deionized water was added little by little to this and dispersed with stirring. In this case, if necessary, it may be mechanically dispersed using a homomixer or the like. Add 50 parts of each of fluidity aid aqueous dispersions K to M to 200.1 parts of the coarsely dispersed slurry liquid, and prepare slurry paints K to M in the same manner as in (1) above.
was created. (4) Production of slurry paint N (Comparative Example 1) As a comparative example, the coarsely dispersed slurry liquid
22 parts of deionized water was added to 200.1 parts and dispersed with an attritor in the same manner as in (1) above to prepare a slurry paint N. (5) Test For each of the obtained slurry paints, the resin particle settling property, redispersibility, painted surface smoothness,
Tested for water resistance, cracks and underarms. (1) Resin particle sedimentation and redispersibility
After stirring the slurry paint whose particle size was adjusted for 40 seconds, it was allowed to stand at 20°C for 15 days, and the sedimentation state of the resin particles was determined by observing the sedimentation state. After stirring again, the redispersibility was determined by the difficulty of dispersion. . (2) Paint surface smoothness, water resistance, cracks and underarms Dilute the slurry paint with deionized water to a viscosity of 20 seconds with a #4 food cup, and spray it onto a zinc phosphate treated steel plate (thickness:
0.8 mm, manufactured by Nippon Test Panel Co., Ltd., Bonderite #3118 treatment) was coated to a dry film thickness of 60 ± 10 microns, and then heated at 180℃ for 30 minutes.
Baking was performed for a minute. These coated plates were evaluated for surface smoothness, cracks, and other surface conditions. However, for coated plates that may cause wrinkles, the treated steel plate should be sprayed in a gradual manner with a minimum dry film thickness of about 20 microns and a maximum dry film thickness of about 90 microns, then left indoors for 5 minutes and then applied under the above conditions. I did the baking. In addition, amino alkyd resin paint white (manufactured by Kansai Paint Company: product name Amiratsuku #805)
Spray paint on the above painted plate and heat at 140℃.
For the coating film obtained by baking for 30 minutes at 40℃,
A 40-day water resistance (immersion) test was conducted to evaluate the condition of the painted surface. The test results are shown in Table-1.

[Table] The criteria for each of the above tests are as follows. (The same applies hereinafter.) (1) Resin particle settling property evaluation (numbers are ratings; the same applies hereinafter) After being left in a room at 20℃ for 15 days 1 Hard sediment is formed (poor) 2 Soft sediment is formed (slightly poor) 3 A small amount of supernatant liquid is formed (Good) 4 Almost no sedimentation (Excellent) (2) Evaluation of redispersibility After being left in a room at 20℃ for 15 days 1 Difficult to stir (Poor) 2 More than 5 minutes of stirring required (Slightly Poor) 3 Re-dispersed within 1 to 5 minutes of stirring (Good) 4 Re-dispersed within 1 minute of stirring (Excellent) (3) Evaluation of coated surface smoothness (visual) 1 Orange skin is noticeable (Poor) 2 Orange skin is observed (Slightly Poor) 3 Orange skin is hardly recognized.
(Slightly poor) 4 Good smoothness (4) Water resistance evaluation 1 Blisters occur and gloss decreases
(Poor) 2 Blisters all over (Slightly poor) 3 Small blisters (Good) 4 A few small blisters in some areas - No blisters (Excellent) (5) Crack evaluation 1 All over (Poor) 2 Parts (Slightly poor) 3 Occurs in very few areas (Good) 4 No occurrence (Excellent) (6) Armpits 1 Occurs when the dry film thickness is 40 microns or less
(Defect) 2 Occurs when the dry film thickness is 40 to 60 microns.
(Slightly poor) 3 Occurred when the dry film thickness was 60 microns or more (Excellent) Examples 14 to 16 and Comparative Example 2 Following the manufacturing method of resin particles in Examples 1 to 13,
Epoxy thermosetting resin particles (gray) were prepared using the following formulation. Bisphenol A type diepoxy resin Note ³⁾ 94 parts Dicyandiamide/imidazole curing agent 6 Titanium oxide (rutile type) 48 Carbon black 2 Paint surface conditioner 1 151 Note 3) Softening point, approx. 97℃, epoxy equivalent approx. 950 To 100 parts of the resin particles, 0.1 part of a water-soluble nonionic surfactant (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Neugen ET-143) and 100 parts of deionized water were added to prepare a roughly dispersed slurry liquid. did. Using this roughly dispersed slurry liquid, Examples 3 and 9
According to the formulation and method of 12, fluidity aid aqueous dispersions C, I and L were added and dispersed, respectively, to prepare slurry paints C', I' and L'. Further, as Comparative Example 2, an epoxy slurry paint N' was prepared using the same formulation and method as in the case of the slurry paint N. Table for slurry paints C', I', L' and N'
A test similar to 1 was conducted. The results are shown in Table-2.

【table】

Claims (1)

[Claims] 1 Water-insoluble thermosetting resin particles that are solid at room temperature and 0.1 to 10 parts by weight of a water-insoluble or water-dispersible nonionic surfactant having an HLB of 8.5 or less as a fluidity aid per 100 parts by weight of the particles are combined into an aqueous solution. A slurry-like thermosetting water-dispersed resin coating composition that is dispersed in a medium.