JP3302653B2 - Painted metal sheet with excellent slip and abrasion resistance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has excellent slip resistance and abrasion resistance, and can withstand bending and other processing, and is used as an exterior material, an interior material, a surface material, a home appliance surface material, a kitchen equipment material, and the like. Related to painted metal sheets.

[0002]

2. Description of the Related Art When a metal plate is subjected to clear coating, the surface state becomes smooth, high in gloss and sharpness, and fingerprints and scratches are hardly formed. Taking advantage of such advantages, clear painted metal sheets are used in various fields as interior materials, exterior materials and the like. However, it is difficult to apply to a part having a remarkable flaw, such as a floor or a table top, because the flaw resistance, abrasion resistance, and slip resistance are insufficient. The scratch resistance and abrasion resistance of the coating are improved by the addition of inorganic aggregate. For example, a powder coating material having improved abrasion resistance and scratch resistance by blending fibrous glass in an amount of 5 to 70% by weight (JP-A-48-66640) is passed through a 150-mesh sieve having a thickness of 3 μm or less. 0.3 to 50% flaky glass
A paint for a pre-coated steel sheet having improved abrasion resistance and scratch resistance by blending (Japanese Patent Application Laid-Open No. 51-8128), an average particle diameter of 3 to 30 parts by weight per 100 parts by weight of a solid content of a vehicle in a coating film.
A coated metal plate (JP-A-8-183926) excellent in scratch resistance and stain resistance using an acrylic resin paint containing 5 to 60 parts by weight of an inorganic aggregate of μm is known.
However, since the transparency of the coating film is poor in any case, it is difficult to make full use of the design properties of the base metal or the undercoating film. Further, although excellent in scratch resistance and abrasion resistance, sufficient properties are not obtained with respect to slip resistance.

[0003] The scratch resistance and abrasion resistance are measured by using an electron beam-curable acrylic paint (Japanese Patent Publication No. 55-5422, Japanese Patent Publication No. 56-8070, Japanese Patent Application Laid-Open No. 1-2229622, Japanese Patent Application Laid-Open No. 2-228663). As can be seen in Japanese Patent Application Laid-Open Publication No. HEI 7-303, it is also improved by irradiation with an electron beam or the like. Since the coating film irradiated with the electron beam has a pencil hardness of 9H or more, the coating film has excellent wear resistance, scratch resistance, and stain resistance. However, the processing cost of the coating film is low, an expensive paint is required, and special electron beam irradiation equipment is required for curing the coating film, so that the production cost is high. Another drawback is that the coating cured by electron beam irradiation is inferior in weather resistance to the thermosetting coating. By the way, floor materials are required to have slip resistance, abrasion resistance and scratch resistance, and granite, ceramic tile,
Vinyl chloride tiles, vinyl chloride sheets and the like are usually used. However, those having the original design feeling of a metal plate such as a stainless steel plate and an aluminum plate are rarely used. Many table tops are also made of wood, and there are no products with metal design on the front.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in order to solve such a problem, and forms a transparent or translucent overcoat film containing flaky glass and calcium silicate. It is an object of the present invention to provide a metal plate having improved slip resistance and abrasion resistance by making full use of the design properties of a base metal or an undercoating film. In order to achieve the object, the coated metal sheet of the present invention comprises 5 to 25% by weight of flaky glass having a thickness of 8 μm or less and an average diameter in the longitudinal direction of 10 to 70 μm based on a nonvolatile component of the coating and an average primary particle size of 1 to 8
A transparent or translucent top coat having a thickness of 5 to 40 μm and a surface roughness Ra of 1.0 to 6.0 μm formed from a top coat containing 0.5 to 10% by weight of calcium silicate of 0.5 μm is provided on the surface layer. It is characterized by having. It is preferable to blend a triazine-based ultraviolet absorber and / or a benzotriazole-based ultraviolet absorber in the paint for forming the top coat. The material of the metal plate used as the substrate is not particularly limited, and may be a cold rolled steel plate, various types of plated steel plates,
Stainless steel plates, copper plates, aluminum plates, etc. are used. However, in order to obtain the original design feeling of the metal, a metal plate having a metallic luster such as a stainless steel plate, an aluminum plate, or a copper plate is preferable. Prior to the formation of the undercoat or topcoat, the base metal plate is subjected to chemical treatment such as mechanical polishing, pickling, phosphate treatment, and chromate treatment, depending on the type and surface condition of the metal plate. The film adhesion can be improved.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A coated metal plate according to the present invention is provided with a base coat layer 2 and a primer layer 3 as required on the surface of a base metal plate 1 as shown in FIG. Is formed. As long as there is a top coat 4 on the surface layer, a coated metal plate (a) having a base coat layer 2 provided between the base metal plate 1 and the top coat 4, a base coat layer 2 and a base coat layer 2 provided between the base metal plate 1 and the top Either a coated metal plate (b) provided with the primer layer 3 or a coated metal plate (c) provided directly with the overcoat 4 on the base metal plate 1 may be used. The base coat layer 2 is not limited to white, and may have another color tone including a clear coating film. The transparent or translucent top coat 4 is formed with a thickness of 5 to 40 μm.
If the film thickness is less than 5 μm, sufficient wear resistance cannot be obtained. Conversely, if the film thickness exceeds 40 μm, the solvent remaining in the coating film at the time of baking may rapidly evaporate, and a pinhole-like coating defect called “side” may be generated. Also, 40μ
When the thickness is more than m, the transparency of the coating film is impaired, and the metallic luster of the base metal plate 1 and when an undercoat film is formed, the undercoat film cannot be sufficiently designed.

[0006] The thickness of the top coat 4 is preferably in the range of 10 to 25 µm from the balance of slip resistance and abrasion resistance.
In applications such as flooring materials where a large amount of wear due to use is expected, a clear coating layer can be further provided as an undercoat film in consideration of wear. By adding a curing agent such as melamine, urea, or isocyanate to the coating film, the hardness of the coating film can be increased. The top coat 4 has a thickness of 8 μm
Hereinafter, 5 to 25% by weight of flaky glass having an average diameter in the longitudinal direction of 10 to 70 μm is blended. If the compounding amount of the flaky glass is less than 5% by weight, the pencil hardness of the coating film becomes F or less, and a sufficient coating film hardness cannot be secured. In addition, since the flaky glass beads are scattered on the surface of the coating film, the unevenness of the coating film surface becomes coarse and the appearance is deteriorated. Conversely, when a large amount of flaky glass exceeding 25% by weight is blended, the opacity of the coating film tends to increase and the surface roughness tends to decrease.

The flaky glass compounded in the coating film is regulated to have a thickness of 8 μm or less and an average diameter in the longitudinal direction of 10 to 70 μm in consideration of required characteristics of the coating film and coating workability.
When a flaky glass having a thickness of more than 8 μm is blended, not only the coating film is easily broken when the coated metal plate is bent, but also easily dropped off due to abrasion. Thick flaky glass tends to settle in the paint, which adversely affects painting workability. The average diameter in the longitudinal direction of the flaky glass is 70μ
If it exceeds m, the flaky glass easily falls off from the surface of the coating film after coating. Conversely, if the average diameter does not reach 10 μm, it becomes difficult to obtain a coating film having a surface roughness Ra of 1.0 μm or more. The top coat 4 has an average primary particle size of 1 to 8 μm
Of calcium silicate is added. Calcium silicate has a particle diameter of 15 to 50 μ in which primary particles are secondarily aggregated in a paint.
m and form a coating film in an agglomerated state, thereby contributing to an improvement in slip resistance. If the average primary particle size exceeds 8 μm, the secondary particles are likely to settle, and the coating workability is deteriorated.
Conversely, if the primary particle size does not reach 1 μm, the secondary particle size also becomes small, so that sufficient slip resistance cannot be obtained.

[0008] Calcium silicate is 0.5 to 10% by weight
(Preferably 1.5 to 5% by weight) is blended in the overcoat 4. If the amount is less than 0.5% by weight, sufficient slip resistance due to calcium silicate cannot be obtained. Conversely, if the amount exceeds 10% by weight, the transparency of the coating film is impaired, and the metallic luster of the base metal plate 1 or the design of the undercoating film cannot be sufficiently exhibited when the undercoating film is formed. The top coat 4 preferably has a coat hardness of 2H or more in a state of being baked and cured. A curing agent such as methylated melamine and butylated melamine for increasing the hardness of the coating film and a curing catalyst such as a sulfonic acid compound for curing the coating film in a short time may be added to the coating film. good. The color of the top coat 4 is
In the case where the base metal plate 1 has a metallic luster or an undercoating film formed thereon, it is preferable that the undercoating material be as transparent as possible so that the design property of the undercoating material is sufficiently exhibited.

Examples of the paint for forming the transparent or translucent top coat 4 include polyvinyl resins such as polyvinyl alcohol, polyvinyl butyral, polyvinyl acetal, polyvinyl acetate, polyvinyl chloride, polyvinyl pyrrolidone and polystyrene, and polymethyl (meth). Acrylate resins such as acrylate, polybutyl (meth) acrylate, polyacrylamide, polyacrylonitrile, polyester resins, polycarbonate resins, polyurethane resins,
Polyamide resin, urea resin, polycaprolactone resin,
A polyarylate resin, a polysulfone resin, a silicone polyester resin, an epoxy resin, or the like, or a copolymer or a mixture of these resins is used as a paint.

When an ultraviolet absorber is added to the transparent or translucent top coat 4, the decrease in adhesion and discoloration due to the transmission of sunlight, ultraviolet rays and the like are suppressed. The ultraviolet absorber contained in the top coat 4 is required to be excellent in heat resistance, sublimation resistance and solubility. Above all, in the air atmosphere,
It is preferable to exhibit heat resistance of not more than 10% by weight at 300 ° C. under a heating condition of 5 ° C./min. There are benzotriazole-based, triazine-based and the like as UV absorbers that satisfy the required characteristics. Preferably,
The triazine alone or a mixture of the triazine and the benzotriazole is added to the paint for the top coat 4. Further, a hindered amine-based light stabilizer can be blended at a ratio of 0 to 3.0% by weight.

The benzotriazole type ultraviolet absorbers include octyl-3- [3-t-butyl-5- (2H-benzotriazol-2-yl) -4-hydroxyphenyl] propinate (TINUVIN 384 manufactured by Ciba Geigy).
), 2- [2-hydroxy-3,5-bis (α, α '
Dimethylbenzyl) phenyl] -2H-benzotriazole (TINUVIN 900 manufactured by Ciba-Geigy), methyl-3
Condensation product of-[3-t-butyl-5- (2H-benzotriazol-2-yl) -4-hydroxyphenyl] propinate and -polyethylene glycol (molecular weight: about 300) (TINUVIN 1130 manufactured by Ciba Geigy), 2- [ 2 '
-Hydroxy-3 '-(3 ", 4", 5 ", 6" -tetrahydrophthalimidomethyl) -5'-methylphenyl "-benzotriazole (manufactured by Kyodo Yakuhin Co., Ltd.
orb 590).

The triazine-based ultraviolet absorber includes, for example, 2- [4-[(2-hydroxy-3-didecyloxypropyl) -oxy] -2-hydroxyphenyl] -4,
6-bis (2,4-dimethylphenyl) -1,3,5-
Triazine and 2- [4-((2-hydroxy-3-tridecyloxypropyl) -oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl-
Mixture of 1,3,5-triazine (Ciba-Geigy)
TINUVIN 400). These ultraviolet absorbers can be used alone or in combination of two or more. The blending amount of the ultraviolet absorber is 1 to 1 with respect to the nonvolatile component of the paint.
It is preferably adjusted to 8% by weight. If the amount is more than 18% by weight, the stain resistance, workability, appearance of the coating film and the like tend to deteriorate. Further, coloring of the coating film due to the ultraviolet absorber is also observed.

In order to further improve the light fastness of the transparent or translucent top coat 4, it is preferable to add a hindered amine-based light stabilizer at a ratio of 3% by weight or less based on the non-volatile components of the paint, if necessary. . Examples of the hindered amine light stabilizer include the following substances. Screw (2, 2,
6,6-tetramethyl-4-piperidyl) sebacate (SANOL LS770 manufactured by Sankyo Co., Ltd.), bis (1,2,2)
2,6,6-pentamethyl-4-piperidyl) sebacate (SANOL LS765 manufactured by Sankyo Co., Ltd.), 1- {2- [3
-(3,5-Di-t-butyl-4-hydroxyphenyl) propionyloxy] ethyl} -4- [3- (3
5-Di-t-butyl-4-hydroxyphenyl) propionyloxy "-2,2,6,6-tetramethylpiperidine (SANOL LS2626 manufactured by Sankyo), 4-benzoyloxy-2,2,6,6-tetra Methyl piperidine (SANOL LS744 manufactured by Sankyo Co., Ltd.), 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-
Triazaspiro [4,5] decane-2,4-dione (SANOL LS440 manufactured by Sankyo), 2- (3,5-di-t)
-Hydroxybenzyl-2-n-butylmalonate bis (1,2,2,6,6-pentamethyl-4-piperidyl) (TINUVIN 144 manufactured by Ciba-Geigy), bis (2,2,6,6-tetramethyl-succinate) 4-piperidyl)
Esters (TINUVIN 780FF manufactured by Ciba-Geigy), polycondensates of dimethyl succinate and 1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine (TINUVIN 622LD manufactured by Ciba-Geigy), poly {[6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl]
[(2,2,6,6-tetramethyl-4-piperidyl)
Imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino] ミ ノ (Ciba-Geigy)
CHIMASSORB 944LD), N, N'-bis (3-aminopropyl) ethylenediamine and 2,4-bis [N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino] -6 Polycondensate of chloro-1,3,5-triazine (CHIMASSORB 119FL manufactured by Ciba Geigy),
Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate (TINUVIN 292 manufactured by Ciba-Geigy)
), Bis (1-octaoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate (TINUVIN 123 manufactured by Ciba-Geigy), HA-70G (manufactured by Sankyo Co., Ltd.), ADK STAB LA-52, ADK STAB LA
-57, ADK STAB LA-62, ADK STAB LA
-63, ADK STAB LA-67, ADK STAB L
A-68, ADK STAB LA-82, ADK STAB
LA-87 (made by Asahi Denka Kogyo Co., Ltd.)

These light stabilizers can be used alone or
A mixture of more than one species can be used. Even when the light stabilizer is added in a large amount exceeding 3.0% by weight, the effect of improving the light resistance is saturated and the improvement corresponding to the increase in the amount is not seen, but rather the coating appearance tends to be deteriorated. The light stabilizer is preferably added in the range of 0.5 to 1.5% by weight. The transparent or translucent top coat 4 is formed via the base coat layer 2 (FIG. 1a), via the base coat layer 2 and the primer layer 3 (FIG. 1b), or directly on the base metal plate 1 (FIG. 1c). be able to. In any case, the color tone of the base metal plate 1 and the base coat layer 2 becomes a ground pattern, and a painted metal plate having a unique depth feeling utilizing the texture of the base material can be obtained.

[0015]

Example 1 A top coat 4 was directly provided on a base metal plate 1.
Production of painted steel sheet (Examples 1 to 11 of the present invention, Comparative Examples 1 to 4, 7
-12: FIG. 1c) A SUS304HL stainless steel sheet having a thickness of 0.5 mm is subjected to degreasing, surface conditioning treatment, and application-type chromate treatment. Then, a translucent top coating is applied so that the dry film thickness becomes 16 μm. By baking at a temperature of 230 ° C. for 1 minute, a translucent resin coating film (top coating film 4) was formed. As a top coat, the thickness is 4 to 12 μm based on the non-volatile components of the paint.
m, 3 to 30% by weight of flaky glass having an average diameter of 45 to 90 μm in the longitudinal direction, 0.3 to 12% by weight of calcium silicate having an average diameter of 3.5 to 8 μm, and a triazine-based ultraviolet absorber (Ciba Geigy Co., Ltd.) Polyester paint to which 3% by weight of TINUVIN 400 (trade name) was added.

The top coat 4 is formed via the base coat layer 2.
Manufacture of formed coated steel sheet (Examples 12 to 15 of the present invention, Comparative Example 5
6: FIG. 1b) After applying a degreasing and surface conditioning treatment to a hot-dip galvanized steel sheet having a sheet thickness of 0.5 mm and performing a coating type chromate treatment, a white polyester-based resin paint is applied so that the dry film thickness becomes 18 μm. The white base coat layer 2 was formed by baking at a plate temperature of 220 ° C. for 1 minute. 5 to 25% by weight of flaky glass having a thickness of 4 to 12 μm and an average diameter in the longitudinal direction of 45 to 90 μm based on the non-volatile components of the paint, and an average primary particle size of 3.5 to 8
μm calcium silicate 0.5 to 10% by weight, triazine-based UV absorber (TINUVIN 400 manufactured by Ciba-Geigy)
) Was applied so as to have a dry film thickness of 16 μm using a translucent polyester-based overcoating material containing 3% by weight of
By baking at a plate temperature of 230 ° C. for 1 minute, a translucent top coat 4 was formed. Table 1 (Example of the present invention) and Table 2 (Comparative Example) show the coating structure of each of the obtained coated steel sheets.

[0017]

[0018]

Performance Test of Coated Steel Sheet The coating metal adhesion, coating film hardness, workability, slip resistance, abrasion resistance, surface roughness, and transparency of the coating film of each of the obtained coated metal sheets were examined. In the coating film adhesion test, the cross section of Eriksen (J
6m including the cross cut specified in IS G3320
m extruded) test, and the peeling state of the coating layer was evaluated in five steps by peeling the adhesive tape. 20 ° C in the workability test
In this room, a 180 ° bending process of 0 to 6 t (1 t when one plate having the same thickness as the test piece is sandwiched) was performed. The surface of the coating film after the bending was observed. A: No cracks were detected at 0 to 2 t, ◎: Cracks occurred at 3 to 4 t, ○: Cracks occurred at 5 t, Δ: Cracks occurred at 6 t. Those in which was generated were evaluated as x. Usually, if the evaluation point is ○ or more, it can be practically used for a precoated steel sheet.

The coating film hardness is JIS-K-5400-6-
Inspection was carried out by a scratching method using Mitsubishi Uni (manufactured by Mitsubishi Pencil Co., Ltd.) in accordance with Section 8.4, and the evaluation was made based on the pencil hardness of the limit at which no scratches were formed. In the slip resistance test, a static friction coefficient and a dynamic friction coefficient were measured using a dynamic slip tester of a spring type. The test piece was stuck under the threat metal, and a neoprene rubber plate having a thickness of 5 mm and a Shore A hardness of 60 was stuck on the slide plate. A predetermined weight was placed on the threat metal, the total weight was adjusted to 800 g, and the weight was moved on the slide plate. Then, the static friction coefficient was obtained from the maximum static friction force at the moment when the threat metal began to slide, and the dynamic friction coefficient was obtained from the kinetic friction force 20 seconds after the start of sliding of the threat metal according to the following equation. , Static friction coefficient or dynamic friction coefficient = F / P, where F: maximum static friction force or kinetic friction force P: total weight of threat metal and weight

In the abrasion resistance test, a hole having a diameter of 6 mm was made in the center of a test piece having a diameter of 120 mm, and the test piece was attached to a Taber abrasion tester after measuring the weight. After being rotated 200 times, the weight of the test piece was measured, and the weight loss was determined from the weight difference before and after the test, and the Taber index was calculated according to the following equation. Taber index = abrasion loss (mg) × 1000 / rotational speed (200) The surface roughness of the coating film was measured with a contact-type surface roughness meter, and the center line average roughness Ra was determined. The transparency of the coating film was examined by visual observation. If the top coating film 4 had sufficient transparency to make use of the metallic luster of the base metal plate 1 or the design of the base coat layer 2, there was some haze. Those that could make use of the design of the object were rated as △, and those that did not make use of the design due to opacity were rated as x.

The results of the above tests are shown in Table 3 (Example of the present invention) and Table 4 (Comparative Example). As is clear from the comparison between Tables 3 and 4, all of the coated steel sheets of the present invention exhibited excellent coating film adhesion, pencil hardness, workability, slip resistance, abrasion resistance, surface roughness, and transparency. All exhibited satisfactory performance. When the amount of calcium silicate added was increased, slip resistance was improved, but abrasion resistance and transparency tended to be reduced. This indicates that it is necessary to determine the amount of calcium silicate to be added depending on whether the emphasis is placed on design, abrasion resistance or slip resistance. Table 3
As can be seen from the above, the coating film hardness tended to increase as the amount of flaky glass added increased. In contrast,
The coated steel sheet of Comparative Example (Table 4) was inferior in one or more of coating film adhesion, pencil hardness, workability, slip resistance, abrasion resistance, surface roughness, and transparency. That is, in Test No. 1, the transparency was inferior, in Test No. 2, the coating film hardness was insufficient, and in Test Nos. 3 to 6, the coating film adhesion and workability were poor due to the difference in the particle size of the flaky glass. In No. 7, sufficient slip resistance could not be obtained because flaky glass having a small average diameter in the longitudinal direction was blended. In Test No. 8, sufficient slip resistance was not obtained because the amount of calcium silicate was small.
In Test No. 9, the transparency of the coating film was insufficient due to excessive addition of calcium silicate.

[0023]

[0024]

[0025]

Example 2 A top coat 4 was applied via a base coat layer 2.
Production of the provided coated steel sheet (Examples 16 to 24 of the present invention, Comparative Example 1)
3 to 16: FIG. 1a) A hot-dip galvanized steel sheet having a thickness of 0.5 mm is subjected to a degreasing, surface conditioning treatment and a coating type chromate treatment, and then a white polyester resin paint is applied so that a dry film thickness becomes 18 μm. By baking at a plate temperature of 220 ° C. for 1 minute, a white base coat layer 2 was formed. Next, a polyester-based top coat was applied so as to have a dry film thickness of 16 μm, and baked at a plate temperature of 230 ° C. for 1 minute to form a translucent top coat 4. In Examples 16 to 24 of the present invention and Comparative Example 13, 20% by weight of flaky glass having a thickness of 4 μm and an average diameter in the longitudinal direction of 45 μm based on the paint non-volatile component was used.
5% by weight of calcium silicate having an average primary particle size of 3.5 μm, and a triazine-based UV absorber (TIBA Geigy Co., Ltd.)
NUVIN 400) and / or a benzotriazole-based UV absorber (TINUVIN 384 manufactured by Ciba-Geigy) in an amount of 0 to 6% by weight, a hindered amine light stabilizer (Ciba-Geigy)
A translucent polyester paint containing 1.5% by weight of TINUVIN 123) was used as a top coat. Comparative Example 14-
In No. 16, the procedure was the same except that 1 to 6% by weight of a benzophenone-based ultraviolet absorber (Viosorb 130, manufactured by Kyodo Yakuhin Co., Ltd.) was used instead of the triazine-based ultraviolet absorber and the benzotriazole-based ultraviolet absorber. Thus, a top coat 4 was formed.

Each of the used ultraviolet absorbers is placed in an air atmosphere,
Heating to 300 ° C at a heating rate of 5 ° C / min for thermogravimetric analysis,
The weight loss rate at 300 ° C. was determined. The weight reduction rate was 3.5% by weight for the triazine-based UV absorber, 5% by weight for the benzotriazole-based UV absorber, and 33% by weight for the benzophenone UV-absorber. Excellent weather resistance and heat resistance of the agent were confirmed.

Performance test of the manufactured coated steel sheet A test piece was cut out from each manufactured coated steel sheet, and the light resistance was examined. In the light resistance test, the test piece was left for 500 hours in a sunshine carbon arc weather meter set at 63 ° C. under the condition of irradiating with fresh water for 12 minutes during irradiation for 60 minutes. Measure the color tone of cyan on the test piece after the test,
The color difference ΔE from the unirradiated test piece was determined. Further, in the same manner as in Example 1, the test piece after the test was examined for coating film adhesion and workability. Table 5 (Example of the present invention) and Table 6
This is shown in comparison with (Comparative Example). The coated steel sheet of the present invention example (Table 5) exhibited sufficiently satisfactory characteristics in all of light resistance, coating film adhesion, and workability. Above all, a system in which a triazine-based ultraviolet absorber and a benzotriazole-based ultraviolet absorber were mixed at a ratio of 1: 1 tended to have better light resistance than a system in which each was blended alone.
On the other hand, Test No. 1 to which no ultraviolet absorber was added
The coated steel sheet No. 3 was inferior in all of light resistance, coating film adhesion, and workability. In addition, in the coated steel sheets of Test Nos. 14 to 16 in which a benzophenone-based ultraviolet absorber was blended instead of the triazine-based ultraviolet absorber or the benzotriazole-based ultraviolet absorber, sufficient light resistance was not obtained.

[0028]

[0029]

[0030]

As described above, in the coated metal plate of the present invention, since the top coat is transparent or translucent, the design properties of the base metal or the undercoat can be fully utilized and the slip resistance can be improved. , Excellent wear resistance. This coated metal sheet is used as an exterior material, an interior material, a surface layer material, a surface layer material of home electric appliances, a material for kitchen appliances, etc. by utilizing its excellent properties.

[Brief description of the drawings]

FIG. 1 shows a cross section of a surface layer portion of a coated metal sheet according to the present invention, in which a transparent or translucent top coat 4 is provided on a base coat layer 2 (a), a primer layer 3 and a base coat layer 2 are provided. Example (b) in which a transparent or translucent top coat 4 is provided, and a transparent or translucent top coat 4
Example with (c)

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁷ Identification code FI B32B 27/20 B32B 27/20 Z C09D 5/00 C09D 5/00 Z C09K 3/14 540 C09K 3/14 540C 540D (56) References JP-A-8-183926 (JP, A) JP-A-1-229622 (JP, A) JP-A-2-2422863 (JP, A) JP-A-56-40544 (JP, A) JP-A-9 JP-A-279060 (JP, A) JP-A-62-181370 (JP, A) JP-B-51-8128 (JP, B1) JP-B-39-14057 (JP, B1) (58) Fields investigated (Int. .7, DB name) B32B 15/08 B05D ⁷ /14-7/24 C09D 5/00-5/46 C09K 3/14

Claims (2)

(57) [Claims] 1. A paint having a thickness of 8 μm or less based on a nonvolatile component of a paint,
Flake glass with an average diameter in the longitudinal direction of 10 to 70 μm
A film thickness of 5 to 40 μm and a surface roughness Ra of 1.0 to 6.0 formed from a topcoat containing 25% by weight and 0.5 to 10% by weight of calcium silicate having an average primary particle size of 1 to 8 μm.
A coated metal plate having excellent slip resistance and abrasion resistance, provided with a transparent or translucent top coat of μm on the surface layer. 2. The coated metal sheet according to claim 1, wherein a triazine-based UV absorber and / or a benzotriazole-based UV absorber are blended in the top coat.