JPH0873778A - Zinc-rich paint and its production - Google Patents

Abstract

PURPOSE: To produce a zinc-rich paint which can give a coating film suppressing the formation of white rust, preventing the corrosion of the iron ground for a long time and having a good appearance by using a specified pigment slurry and a silicic binder as the principal components. CONSTITUTION: Zinc flakes in the form of a flaky zinc powder having a mean particle diameter of 2-40μm and an average thickness of 5μm or below and 3-20wt.%, based on the weight of the zinc flakes, aluminum flakes are introduced into an alcohol and/or a ketone under agitation. 0.1-12wt.%, based on the weight of the zinc flakes, inorganic metal salt soluble in the alcohol or the ketone is added to the dispersion to obtain a pigment slurry. This slurry is left to stand for one day or longer. An inorganic binder being a partial saponificate of an alkali silicate and an alkyl silicate is mixed with a solvent such as isopropanol, and water is added to the mixture to form a uniform dispersion. Hydrochloric acid as a catalyst is added to this dispersion, and the mixture is reacted under agitation to obtain an alkyl silicate binder. This is mixed with the above prepared pigment slurry to obtain a zinc-rich paint having a metallic zinc content of 60-95wt.%, based on the weight of the solid matter of the coating material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zinc rich paint, and more particularly to a zinc rich paint having a large corrosion resistance and a good coating appearance.

[0002]

2. Description of the Related Art Zinc rich paint (high-concentration zinc dust paint) is a rust preventive paint that contains a high concentration of zinc powder in an inorganic or organic binder (binder). Electrochemical sacrificial protection function The secondary product of zinc is the function of blocking the atmosphere. That is, since zinc is a metal that is electrochemically less base than iron, it is a sacrifice and melts before iron, so that the elution of iron is suppressed. And this alone cannot be expected to have a long-term rust preventive effect, but as the next step, the eluted zinc reacts with carbon dioxide gas in the air to form water-insoluble basic zinc carbonate, which is the surface of the coating film. Deposited on the surface to suppress the activity of zinc and provide long-term corrosion protection.

Among the zinc-rich paints of this kind, those using an organic binder are binders such as epoxy ester resin which are dense and have high electrical insulation. There is little direct contact between the zinc powders, and the electrical conduction through the binder is weak, so the conductivity in the coating film containing zinc is not always reliable. Therefore, when a coating film is formed, the above-mentioned electrochemical sacrificial protection effect of zinc between the base material (iron) and the base material (iron) is weak, and the base material (iron) is corroded early. For this reason, the organic zinc-rich paint is generally used as an undercoat rather than being used alone, and is then coated with another paint.

On the other hand, in the case of using an inorganic binder, the viscosity of the binder is small, and particularly alkali silicate and alkyl silicate have many voids inside, so almost all zinc powders come into direct contact with each other. The ion is easily passed through the binder while it is in a state of being in contact. Therefore, the conductivity of the coating film is good, and since the electrochemical sacrificial protective action of zinc is exerted for a long period of time, it is used in combination with the topcoat or alone, and is used for factory buildings, marine structures, Very versatile in various chemical plants. These inorganic zinc-rich paints are produced by mixing granular zinc powder, an inorganic binder, and thinner in advance, and when this is applied to the base, the coating film is hardened by the hardening action of the binder.

[0005]

As described above, the inorganic zinc-rich paint is very useful because it has high corrosion resistance even when used alone, but it has the following problems.

(1) Zinc causes white rust due to the presence of water, oxygen, carbon dioxide gas, etc., and is particularly noticeable in the early stage of application and when water drops adhere. This cause is less likely to occur when zinc becomes a zinc salt such as zinc oxide or basic zinc carbonate and completely blocks the atmosphere, but the zinc compound is not dense enough in the early stage after application. When a water drop adheres at, a potential difference occurs between zinc and iron, and zinc is selectively ionized and bonded with oxygen and carbon dioxide gas in the environment,
It changes to zinc oxide, basic zinc carbonate, etc. and deposits on the surface to become white rust. Here, since the zinc powder has a large surface area, the area in which such a corrosive action occurs is large, so that the occurrence of white rust becomes remarkable.

(2) When zinc powder is used, a dull gray appearance is obtained, and a metallic luster like that of hot dipping cannot be obtained. For this reason, zinc rich paint cannot be used as a paint for automobile parts, civil engineering structures, etc. where appearance is important, and when it is used without topcoating, its application is very limited. It will be a good thing. On the other hand, JP-A-4-27076
Attempts have also been made to produce zinc-rich paints using zinc flakes instead of zinc powder as described in JP-A-8. The use of zinc flakes provides a glossy appearance, and since the total surface area is larger than that of zinc powder, it has the advantage of exhibiting better corrosion resistance than zinc powder when used properly.

However, since zinc flakes are produced by adding a higher fatty acid such as stearic acid as a grinding aid or a lubricant to zinc powder as a raw material and spreading it with a ball mill or the like, the fatty acid or its metal salt is zinc. It remains on the surface of the flakes. Since these prevent contact between the binder and zinc, the adhesion of the coating film is not very good, and because they prevent contact between zinc and between zinc and the substrate, the electrochemical sacrificial protective effect is reduced, and white There is a problem that rust is generated significantly.

The present invention has been made under such circumstances, and an object of the present invention is to provide a zinc-rich paint that can obtain a good appearance.

Still another object is to provide a zinc rich paint which can suppress the generation of white rust and which can prevent the corrosion of the base iron over a long period of time.

[0011]

The zinc-rich paint of the present invention comprises a pigment slurry obtained by mixing zinc flakes, for example, aluminum flakes and alcohol, and a silicate-based binder. And are the main components. Here, the zinc flakes are scaly zinc powders having an average major axis of, for example, 2 μm to 40 μm and an average thickness of, for example, 5 μm or less, which is different from the conventionally used granular zinc powder. The aluminum flakes are effective in suppressing the generation of white rust as described later, but nickel flakes may be mixed in place of the aluminum flakes or together with the aluminum flakes. These flakes are also scale-like metal powder.

Regarding the manufacturing method of zinc rich paint,
Zinc flakes and, for example, aluminum flakes were put into an alcohol and stirred to adjust the pigment slurry, while preparing an inorganic binder to which a solvent was added,
A zinc rich paint is obtained by mixing this with the pigment slurry.

Examples of the alcohol include methanol, ethyl alcohol, isopropyl alcohol, ethylene glycol and the like, and examples of the ketone include acetone and methyl ethyl ketone. The amount of each component of the pigment slurry is not particularly limited, but if the amount of zinc flakes is too small, the zinc flakes do not become uniform in the slurry and the original function of the zinc rich paint is obtained. Corrosion resistance is reduced. Further, the blending amount of aluminum flakes (or nickel flakes) is preferably 3 to 20% by weight or more with respect to zinc flakes in order to obtain a sufficient white rust suppressing effect.

Further, in the pigment slurry, an inorganic metal salt soluble in alcohol or ketone, such as calcium nitrate, magnesium nitrate, ferric nitrate, nickel nitrate, cobalt nitrate or zinc nitrate in the case of ethanol. It is preferable to add a nitrate or a hydrochloride such as ferrous chloride, ferric chloride or nickel chloride. These additives are
As described below, the purpose is to obtain the effect of removing fatty acids from zinc flakes and the effect of suppressing the elution of zinc, and in order to obtain these effects sufficiently, 0.1 to 1% of zinc flakes is used.
It is desirable to add 2% by weight.

As the inorganic binder, alkali silicates such as sodium silicate and potassium silicate, or partial hydrolysates of alkyl silicates such as methyl silicate and ethyl silicate can be used. Since these have a large number of voids, direct contact between the zinc flakes can be sufficiently achieved, and the ions can easily move even in the binder, which is preferable, but the present invention is not limited to these binders. It is not limited. If the content of metallic zinc in the solid component relative to the solid content of the binder is too small, the degree of direct contact with the zinc flakes will be small, and conversely if it is too large, the coating film will be sufficiently cured when applied. Therefore, the content of metallic zinc is preferably 60 to 95% by weight based on the solid content in the coating.

[0016]

By using zinc flakes, the appearance after coating has a metallic luster, which is better than that using zinc powder. When zinc flakes are slurried with alcohol, fatty acids such as stearic acid and zinc stearate used as grinding aids and lubricants when flaking in the manufacturing process of zinc flakes The residual metal salt swells and separates from the zinc flakes. This detaching action is sufficiently performed by leaving it at room temperature for about one week after being made into a slurry.
Heating the pigment slurry is more accelerated and shortens the required standing time. It is presumed that the fatty acid and its metal salt adhering to the zinc flakes are swollen by the alcohol and / or the ketone and are peeled off, and further, the metal salt soluble in the alcohol and / or the ketone (nitrate or By adding chloride, the peeling action is further promoted, and the required standing period is shortened to, for example, about one day.

As described above, the fatty acid and the fatty acid salt are zinc flakes.
If the zinc flakes are separated from the base metal, electrical contact between the zinc flakes and the base metal and electrical contact between the zinc flakes can be secured, so that the adhesion to the base is good, and the zinc flakes
The original electrochemical sacrificial protection of ku can be fully functioned. Further, by adding the metal salt, in addition to the above-mentioned releasing action, the elution of zinc after coating is moderately suppressed, which makes it possible to prolong the electrochemical anticorrosion function. Is effective for. It should be noted that it is preferable to add the metal salt during preparation of the pigment slurry (at the time of making the metal flake into a slurry), because the zinc rich paint can be applied after leaving the fatty acid or the fatty acid salt until it is sufficiently separated. The binder may be added at the time of mixing with the binder, and in that case, the additive may be mixed alone or a method of adding it in the binder in advance may be adopted.

When the pigment slurry thus obtained, the binder and the thinner are mixed and coated on a base made of, for example, iron, a cured coating film is formed by the curing action of zinc and the binder. The aluminum frame present in the coating film
As will be apparent from the examples described below, the black has an action of suppressing the generation of white rust. Although the reason is not clear,
The aluminum flakes cover the upper surface of the coating film to some extent and have the effect of shielding the coating film from the environment. (Leafing effect). It is speculated that this effect suppresses the corrosion of zinc to some extent. Further, due to the presence of the aluminum flakes, the coating surface has a metallic luster like hot dip galvanizing, and a better coating appearance can be obtained as compared with the case of zinc flakes alone.

Therefore, the zinc rich paint of the present invention is
Since it can be used as a single layer without overcoating, it has a wider application range as an exterior coating even for exterior parts such as automobile parts and building parts, and the coating process is more difficult than undercoating and topcoating. To be simplified. And in the case of hot dip galvanizing that can obtain the same appearance, the use place was limited because a melting bath for melting zinc was required, but the zinc rich paint of the present invention does not require such a large-scale device. Therefore, it can be used on site without bringing the object to be coated into a special factory.

The aluminum flakes have the effects of suppressing white rust and providing a good appearance, and prevent the zinc flakes from aggregating when the pigment slurry is adjusted.
It also has the effect of making the dispersion of the paint uniform, which allows a uniform coating film to be obtained. Although the above effect can be obtained by using nickel flakes instead of aluminum flakes, the present invention is not necessarily limited to using these metal flakes, and zinc flakes alone. May be Incidentally, in the composition of the present invention, a pigment used in a usual coating composition other than the above essential components, a solvent, an anti-settling agent,
Additives such as anti-sagging agents may be blended in appropriate amounts without any problem.

The composition obtained according to the present invention may be applied to the iron base material by a usual means such as air spray, airless spray, roll coater, brush and dried by natural drying or hot air drying. A bar coater was used to control the film thickness for experimental coating in the laboratory.

[0022]

【Example】

Example 1 Zinc flakes were mixed with ethyl alcohol to prepare a metal pigment slurry according to the blending amount shown in Table 1, and the slurry was allowed to stand at room temperature for 7 days, and then mixed with an ethyl silicate binder to prepare a zinc rich paint. Got Here, the ethyl silicate binder was manufactured by the following method. That is, for example, 50 parts by weight of ethyl silicate 40 and 44 parts by weight of iso-propanol are placed in a reaction container made of a polyethylene container, stirred several times, and then 5 parts by weight of water is added and further stirred. When water is uniformly dispersed (or dissolved), 1 part by weight of 1N hydrochloric acid is poured as a catalyst to start the reaction. Stirring 1
Perform at 00-200 rpm. When the liquid temperature rises and after the maximum temperature has passed, stirring is continued for about 1 to 2 hours until it returns to room temperature, to obtain an ethyl silicate binder having a solid content of about 20 wt%. The zinc rich paint produced in this way was applied to the test panel with a bar coater, and
It was left to dry for a day. The test panel was used after cold-rolled steel plate (SDCC-D) 150 × 70 × 0.8 mm was polished with glass bead blast to degrease the solvent.

Example 2 Zinc flakes and aluminum flakes were mixed with ethyl alcohol in accordance with the blending amounts shown in Table 1 to prepare a metal pigment slurry, and the slurry was allowed to stand at room temperature for 7 days and then added to an ethyl silicate binder. A zinc rich paint was obtained by mixing. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 103 days to dry.

Example 3 Zinc flakes and nickel flakes were mixed with ethyl alcohol in accordance with the blending amounts shown in Table 1 to prepare a metal pigment slurry, which slurry was allowed to stand at room temperature for 7 days, and then the ethyl silicate binder. To obtain a zinc rich paint. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Comparative Example 1 Zinc powder was mixed with an ethyl silicate binder according to the blending amounts shown in Table 1 to obtain a zinc rich paint. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Comparative Example 2 Zinc flakes and aluminum flakes were mixed with ethyl alcohol in accordance with the blending amounts shown in Table 1 to prepare a metal pigment slurry, and the slurry was allowed to stand at room temperature for 1 day, followed by ethyl silicate binder. To obtain a zinc rich paint. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Comparative Example 3 Zinc flakes and aluminum flakes were mixed with an ethyl silicate binder according to the blending amounts shown in Table 1 to obtain a zinc rich paint. Apply this zinc rich paint to the test panel with a bar coater, and
It was left for 0 days to dry.

[Table 1]

Next, the above Examples 1 to 3 and Comparative Examples 1 to 3
The appearance of the coating film obtained in 1 above was visually observed, and the film thickness, adhesion, and corrosion resistance against white rust and red rust were inspected. The film thickness is measured using an electromagnetic film thickness meter (Fisher Permscope), and the adhesion is measured according to JIS
D-0202 General Rules for Coating Films of Automobile Parts According to the 4.15 cross-cut adhesion test method, cellophane tape was peeled off, and the number of cross-cuts left without being completely peeled off was examined. The corrosion resistance was measured by observing the test panel at regular intervals according to JIS Z-2371 salt spray test method, and measuring the time until white rust occurred and the time until red rust occurred.

[Table 2]

From these results, comparing Example 1 with Comparative Example 1, by dissolving zinc flakes in ethanol to prepare a pigment slurry, a metallic luster is obtained as compared with the case where zinc powder is used as the metal powder. It was confirmed that a certain coating appearance can be obtained and that the time until white rust is generated can be extended by about 8 times, and the white rust generation can be suppressed.

Further, by comparing Example 1 and Example 2,
It has been confirmed that the addition of aluminum flakes to the pigment slurry can further suppress the generation of white rust, and by comparing Example 1 and Example 3, the addition of nickel flakes to the pigment slurry further suppresses the generation of red rust. It was confirmed that it can be done. Comparative Example 2
From this, it was confirmed that if the leaving time of the pigment slurry was shortened to 3 days, the adhesion of the coating film was deteriorated and white rust and red rust were likely to occur. As described above, when the pigment slurry is left alone for a short period of time, the fatty acids and metal salts thereof remaining in the zinc flakes cannot be sufficiently released, which causes electrical contact between the zinc flakes and the base material, and the zinc flakes. It is presumed that the electrical contact between flakes is hindered, and the electrochemical sacrificial protective action of zinc flakes cannot be fully functioned. Furthermore, according to Comparative Example 3, when zinc flakes and the like are directly mixed with an ethyl silicate binder without being dissolved in alcohol, a coating appearance having irregularities on the surface is obtained, and the adhesion of the coating film is extremely poor, resulting in white rust and white rust. It was confirmed that red rust was likely to occur.

Example 4 Zinc flakes and aluminum flakes were mixed with methanol in accordance with the blending amounts shown in Table 3 to prepare a metal pigment slurry, and the slurry was allowed to stand at room temperature for 7 days.
A zinc rich paint was obtained by mixing with an ethyl silicate binder. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Example 5 A zinc rich paint was obtained by changing the solvent for the metal pigment slurry used in Example 4 to iso-propanol and using a sodium silicate binder according to the blending amount shown in Table 3. This zinc rich paint was applied to a test panel with a bar coater and left in the room for one day to dry.

Example 6 A zinc rich paint was obtained by changing the solvent for pigment slurry used in Example 4 to n-butanol according to the blending amount shown in Table 3. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Example 7 A zinc rich paint was obtained by changing the solvent for pigment slurry used in Example 4 to ethylene glycol according to the blending amount shown in Table 3. Apply this zinc rich paint to the test panel with a bar coater and
It was left to dry for a day.

Example 8 A zinc rich paint was obtained by changing the solvent for the pigment slurry used in Example 4 to acetone and using a sodium silicate binder in accordance with the blending amount shown in Table 3. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Example 9 According to the blending amount shown in Table 3, the solvent for pigment slurry used in Example 4 was changed to methyl ethyl ketone (MEK) to obtain a dichric paint. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Comparative Example 4 A pigment slurry was prepared by mixing zinc flakes and aluminum flakes with oleic acid in accordance with the blending amounts shown in Table 3, and the slurry was allowed to stand at room temperature for 7 days and then added to an ethyl silicate binder. A zinc rich paint was obtained by mixing. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Comparative Example 5 A zinc rich paint was obtained by changing the solvent for the pigment slurry used in Comparative Example 4 to benzene according to the blending amount shown in Table 3. The pigment slurry was left standing for 3 days at room temperature. This zinc rich paint was applied to a test panel with a bar coater and left indoors for 10 days to dry.

Comparative Example 6 The solvent for the pigment slurry used in Comparative Example 4 was N, N-dimethylformamide (DM) according to the blending amount shown in Table 3.
A zinc rich paint was obtained using sodium silicate binder while changing to F). Paint this zinc rich paint on the test panel with a bar coater,
It was left to dry in the room for 10 days.

[Table 3]

With respect to the coating films obtained in Examples 4 to 9 and Comparative Examples 4 to 6, the appearance, the film thickness, the adhesion, and the weather resistance against white rust and red rust were examined by the method described above. Show

[Table 4] From this result, methanol as a solvent for the pigment slurry,
When an alcohol such as iso-propanol, n-butanol or ethylene glycol or a ketone such as acetone or MEK is used, the adhesiveness of the coating film and the corrosion resistance to rust are remarkably higher than those when benzene oleate or DMF is used. It was confirmed to be good for It is presumed that the reason is that the alcohol and / or ketone removes the fatty acid and the fatty acid zinc residue on the surface of the zinc flake while swelling and improving the adhesion and corrosion resistance of the coating. In particular, it was confirmed that iso-propanol and acetone have a large white rust generation suppressing effect, and ethylene glycol and MEK have a large red rust generation suppressing effect.

Example 10 Zinc flakes, aluminum flakes and ferrous chloride were mixed with ethyl alcohol to prepare a pigment slurry in accordance with the blending amounts shown in Table 5, and the slurry was allowed to stand at room temperature for 1 day. A zinc rich paint was obtained by mixing with an ethyl silicate binder. Apply this zinc rich paint to the test panel by air spray and
It was left for 0 days to dry.

Example 11 A zinc rich paint was obtained by changing the metal salt used in Example 10 to ferric chloride according to the blending amount shown in Table 5. This zinc rich paint was applied to a test panel by air spray and left indoors for 10 days to dry.

Example 12 A zinc rich paint was obtained by changing the metal salt used in Example 10 to magnesium nitrate according to the blending amount shown in Table 5 and using a potassium silicate binder. This zinc rich paint was applied to a test panel by air spray and left to dry in a room for 1 day.

Example 13 A zinc rich paint was obtained by changing the metal salt used in Example 10 to nickel nitrate according to the blending amount shown in Table 5. This zinc rich paint was applied to a test panel by air spray and left indoors for 10 days to dry.

Example 14 A zinc rich paint was obtained by changing the metal salt used in Example 10 to cobalt nitrate according to the blending amount shown in Table 5 and using a potassium silicate binder. This zinc rich paint was applied to a test panel by air spray and left indoors for 10 days to dry.

Example 15 A zinc rich paint was obtained by changing the metal salt used in Example 10 to zinc nitrate according to the blending amount shown in Table 5. This zinc rich paint was applied to a test panel by air spray and left indoors for 10 days to dry.

Comparative Example 7 A pigment slurry was prepared by mixing zinc flakes, aluminum flakes and zinc oxide with ethyl alcohol according to the blending amounts shown in Table 5 and leaving the slurry at room temperature for 1 day. A zinc rich paint was obtained by mixing with an ethyl binder. Apply this zinc rich paint to the test panel by air spray and
It was left to dry for a day.

Comparative Example 8 A zinc rich paint was obtained by changing the metal salt used in Comparative Example 4 to zinc acetate according to the blending amount shown in Table 5.
The pigment slurry was allowed to stand for one day at room temperature. This zinc rich paint was applied to a test panel by air spray and left indoors for 10 days to dry.

Comparative Example 9 A zinc rich paint was obtained by changing the metal salt used in Comparative Example 4 to nickel acetate and using a potassium silicate binder according to the blending amount shown in Table 5. The pigment slurry was allowed to stand for one day at room temperature. This zinc rich paint was applied to a test panel by air spray and left indoors for 10 days to dry.

[Table 5]

With respect to the coating films obtained in Examples 10 to 15 and Comparative Examples 7 to 9, the appearance, the film thickness, the adhesion, and the weather resistance against white rust and red rust were measured by the method described above. Show.

[Table 6] From these results, it is possible to add pigments such as ferric chloride and ferric chloride and metal nitrate salts such as magnesium nitrate, nickel nitrate, cobalt nitrate and zinc nitrate It was confirmed that even if it is as short as about 1 day, good adhesion and an effect of suppressing the generation of white rust and red rust can be secured. On the other hand, when zinc oxide, zinc acetate or nickel acetate is added as an additive, the pigment It was confirmed that when the slurry was allowed to stand for as short as one day, the adhesion of the coating film was extremely poor and rust was likely to occur.

As described above, when the alcohol and / or ketone soluble additives such as the above-mentioned hydrochlorides and nitrates are added, the fatty acid and its metal salt attached to the zinc flakes are removed by the alcohol. Is promoted, fatty acids and the like are sufficiently released even if the standing period is short, and by the release of fatty acids and the like, the contact between the zinc flakes and the base or zinc flakes is secured, and the adhesion is improved. It is presumed that the electrochemical sacrificial protection effect possessed can be fully functioned. On the other hand, since zinc oxide, zinc acetate, nickel acetate, etc. are not soluble in alcohol, they can hardly promote the action of releasing the fatty acids etc. adhering to the zinc flakes, and the adhesiveness and rust preventive function are Presumed to be inferior.

[0052]

The zinc-rich paint of the present invention comprises a pigment slurry obtained by mixing zinc flakes with alcohol and / or ketone and an inorganic binder as main components, and therefore, the appearance after painting is It has a metallic luster and is good, and white rust can be suppressed. Further, by adding an alcohol and / or ketone-soluble inorganic metal salt, the leaving time of the pigment slurry is shortened and the adhesion to the substrate is improved,
Furthermore, the occurrence of white rust can be suppressed. Furthermore, by adding aluminum flakes and / or nickel flakes, it is possible to further suppress the occurrence of white rust rather than a better appearance after coating.

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[Procedure amendment]

[Submission date] November 2, 1994

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title: Zinc rich paint and method for producing the same

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zinc rich paint, and more particularly to a zinc rich paint having a large corrosion resistance and a good coating appearance and a method for producing the same.

Claims (8)

[Claims] 1. A pigment slurry, which is obtained by mixing zinc flakes with alcohol and / or ketone, and a silicate-based binder for binding the zinc flakes as a main component. Zinc rich paint. 2. The zinc-rich paint according to claim 1, which contains an inorganic metal salt soluble in alcohol and / or ketone as an additive. 3. The zinc rich paint according to claim 2, wherein the inorganic metal salt is a nitrate and / or a chloride. 4. The zinc rich paint according to claim 1, wherein the binder is an alkyl silicate or an alkali silicate. 5. The zinc rich paint according to claim 1, 2, 3, or 4, wherein the pigment slurry contains aluminum flakes and / or nickel flakes. 6. A first step of mixing zinc flakes with an alcohol and / or a ketone to obtain a pigment slurry, and a second step of mixing the pigment slurry with an alkyl silicate or an alkali silicate. A method for producing a zinc rich paint, which is characterized in that 7. The zinc rich paint according to claim 6, wherein the first step and / or the second step includes a step of adding an alcohol and / or ketone-soluble inorganic metal salt as an additive. Production method. 8. The method for producing a zinc rich paint according to claim 6, wherein the first step includes a step of mixing aluminum flakes and / or nickel flakes.