KR101915924B1 - Coating composition and method for forming a dry coating film - Google Patents

Abstract

(A), an amine-based curing agent (B), a vinyl chloride-based copolymer (C), a monoepoxide compound (D), and a mixture of a bisphenol A type epoxy resin Wherein the content of the vinyl chloride copolymer (C) is 5 to 50 parts by mass based on 100 parts by mass of the bisphenol A epoxy resin (A), and the amount of the monoepoxide compound ( D) is 2 to 50 parts by mass based on 100 parts by mass of the amine-based curing agent (B), and the first agent contains the bisphenol A-type epoxy resin (A) and the vinyl chloride-based copolymer (C) (Meth) acrylate compound (E) contains an amine curing agent (B) and a monoepoxide compound (D), and a vinyl ester resin, a coating film formed using the coating composition, and a coating film Ships and offshore structures are provided.

Description

Coating composition and method for forming a dry coating film

The present invention relates to an epoxy based anticorrosion coating composition. The present invention also relates to a conventional coating film formed of the conventional coating composition, and to a coating material such as a ship or an ocean structure having the conventional coating film. The present invention also relates to a coating film forming method and a coating material used therefor.

In general, marine structures such as ships, bridges, tanks, and plants are subjected to a spray coating on the surface thereof for the purpose of imparting corrosion resistance under severe corrosive environments. There are many cases where an antifouling paint is applied on the painting surface. In order to impart desired characteristics by forming a coating film, it is important to control the thickness of the dried coating film, and if the formed dried coating film does not have a sufficient thickness, characteristics to be imparted are also likely to become insufficient.

For example, Japanese Unexamined Patent Application Publication No. 10-211464 (Patent Document 1) discloses a method in which a non-tar epoxy resin heavy paint is applied to the bottom, bottom, and waterline of a ship, Thereby coating a hydrolyzable antifouling paint. Japanese Unexamined Patent Application Publication No. 10-259351 (Patent Document 2) discloses a non-tar epoxy resin coating composition comprising a bisphenol-type epoxy resin, a vinyl chloride-based copolymer, and a curing agent comprising polyamide or a modified product thereof, On a ship or the like, and coating a non-tin-based hydrolyzable antifouling paint thereon. Japanese Patent Application Laid-Open No. 2002-167548 (Patent Document 3) discloses coating an epoxy coating composition containing a specific urethane amine compound as an anticorrosive paint on a ship or the like, and coating an overcoating paint thereon .

However, the film thickness control of the coating film is not an easy task. As a conventional method of controlling the film thickness, there is a method of controlling the thickness of the film before i) a wet gauge in order to confirm in advance whether or not a target dry film thickness (to obtain desired physical properties sufficiently) is obtained, ), And calculating and confirming the dry film thickness on the basis thereof,

ii) a method of directly measuring the film thickness of the dry coating film using an electronic film thickness meter or the like, in order to confirm whether or not the film thickness of the dry coating film reaches a target film thickness

.

However, in any of the above methods, it is difficult to effectively manage the film thickness in the following cases.

1) When the area of the surface of the substrate on which the coating material is coated is large, such as a ship. In this case, it is extremely complicated to measure the film thickness using a wet gauge, an electronic film thickness meter or the like over the entire surface of the substrate, which is difficult in practice.

2) The surface of the substrate on which the coating material is coated includes a surface which is not easily coated. It is difficult and cumbersome to measure the film thickness of the coating film formed on such a surface by using a wet gauge or an electronic film thickness meter, although the film thickness is likely to be uneven on the surface on which the coating of the coating material is not easy.

3) When the target film thickness of the coat formed by one coat is large. The film thickness after formation of the coating film to be formed in one shot is liable to increase in frequency of measurement of the coating film thickness during coating, which makes management of film thickness troublesome. On the other hand, " one shot " means that a series of operations from coating to painting to drying is performed once. Thus, the coating film formed by one coat means coating the coating once or plural times , And a coating film formed by performing a drying treatment once.

As a method for solving the above conventional problems, JP-A-10-216621 (Patent Document 4) and JP-A-2002-066445 (Patent Document 5) It is disclosed that a coating film is formed by using a paint capable of determining whether or not a coating film thickness of a wet coating film has reached a specified film thickness by observing a change in color of a wet coating film during coating, have.

Japanese Patent Application Laid-Open No. 10-211464 Japanese Patent Application Laid-Open No. 10-259351 Japanese Patent Application Laid-Open No. 2002-167548 Japanese Unexamined Patent Application Publication No. 10-216621 Japanese Patent Application Laid-Open No. 2002-066445

When the epoxy based anticorrosive coating composition has a long period of time from the application of the epoxy-based anticorrosive coating composition to the application of the topcoat, when the anticorrosive anticorrosive coating composition is applied to the substrate and then the top coating is applied thereto, There was a problem of falling behind. Patent Document 3 discloses that the problem can be solved by containing a specific urethane amine compound in the epoxy coating composition. On the other hand, if the period is shortened in order to secure the adhesion to the top coat, the coating work process becomes troublesome, or the coating worker is forced into a severe working environment.

It is an object of the present invention to provide a coating composition which can form a coating film having good adhesion to an upper coating film even when a coating composition is applied for a long period of time until coating the upper coating composition while maintaining good adhesion to the top coating film. Which is capable of prolonging the period of time required for the coating of the coating film. Another object of the present invention is to provide a coating film (anticorrosive film) formed using the anticorrosion coating composition, and a vessel and an offshore structure having the coating film.

It is still another object of the present invention to provide a coating composition which can form a coating film having good adhesion to a top coat even when a topcoat is applied for a long period of time. In other words, it is possible to coat the top coat while maintaining good adhesion to the top coat By using an epoxy based anticorrosive coating composition capable of extending a period of time until the formation of a coating film which can easily form a dry film having a predetermined film thickness while suppressing the film thickness shortage And to provide a paint to be used in the method.

The present invention provides an anticorrosive coating composition as described below, and a coating film, a vessel and an offshore structure.

[1] A resin composition comprising a bisphenol A epoxy resin (A), an amine curing agent (B), a vinyl chloride copolymer (C), and a monoepoxide compound (D)

The content of the vinyl chloride-based copolymer (C) is 5 to 50 parts by mass based on 100 parts by mass of the bisphenol A type epoxy resin (A)

Wherein the content of the monoepoxide compound (D) is 2 to 50 parts by mass relative to 100 parts by mass of the amine curing agent (B).

[2] The anticorrosional coating composition according to [1], wherein the content ratio of the monoepoxide compound (D) to the vinyl chloride copolymer (C) is 0.02 to 2.5 in mass ratio.

[3] The anticorrosive coating composition according to [1] or [2], wherein the monoepoxide compound (D) comprises an alkyl glycidyl ether compound.

[4] The anticorrosive coating composition according to any one of [1] to [3], wherein the amine curing agent (B) is a polyamide amine.

[5] The anticorrosive coating composition according to any one of [1] to [4], wherein the vinyl chloride-based copolymer (C) is a vinyl chloride-vinyl alkyl ether copolymer.

[6] An anticorrosive coating composition according to any one of [1] to [5], further comprising a (meth) acrylate compound (E).

[7] A two-part type anticorrosion coating composition comprising a first agent and a second agent,

Wherein the first agent contains the bisphenol A-type epoxy resin (A) and the vinyl chloride-based copolymer (C)

The anticorrosive coating composition according to any one of [1] to [6], wherein the second agent contains the amine curing agent (B) and the monoepoxide compound (D).

[8] A coated film formed from the anticorrosion coating composition according to any one of [1] to [7].

[9] A ship or an offshore structure having the coating film described in [8].

The present invention also provides a method for forming a dry coating film and a coloring type coating material as described below.

[1] A method for forming a dried coating film on a surface of a substrate,

The following process:

[1] a step of setting a dry film thickness T;

[2] A two-part coloring system paint comprising a first agent and a second agent, wherein the following conditions (a) to (i)

  (a) a coating film formed of the coloring type paint having the dry film thickness T conceals the surface of the object,

  (b) a color difference DELTA E1 between a coating film formed of the colored coating film having the dry film thickness T and a coating film formed of the colored coating film having a dry film thickness of 0.7T is 2.0 or more,

  (c) contains a coloring pigment,

  (D) a bisphenol A epoxy resin (A), an amine curing agent (B), a vinyl chloride copolymer (C), a monoepoxide compound (D), a (meth) acrylate compound (E) Lt; / RTI >

  (e) the content of the vinyl chloride-based copolymer (C) is 5 to 50 parts by mass based on 100 parts by mass of the bisphenol A epoxy resin (A)

  (f) the content of the monoepoxide compound (D) is 2 to 50 parts by mass based on 100 parts by mass of the amine curing agent (B)

  (g) the first agent contains the bisphenol A-type epoxy resin (A) and the vinyl chloride-based copolymer (C)

  (h) the second agent contains the amine curing agent (B) and the monoepoxide compound (D)

  (i) the (meth) acrylate compound (E) comprises a vinyl ester resin

, A step of preparing or preparing a coloring-type coating material which satisfies the following conditions:

[3] A method of manufacturing a coloring type coating material, comprising the steps of: coating the surface of the object with the coloring type coating material until the surface of the object is concealed by a coating film comprising the coloring type coating material;

[4] Step of drying the coating film obtained by the process of [3] to obtain a dried coating film

≪ / RTI >

[2] The coloring-type coating material according to any one of [1] to [

  (j) A color difference DELTA E2 between a coating film formed of the coloring type coating material having the dry film thickness T and a coating film formed of the coloring type coating material having a dry film thickness of 1.3T is less than 1

Is satisfied. ≪ / RTI >

[3] The colored coating material according to any one of [1] to [

  (k) a color difference? E3 between the coating film formed of the coloring type coating material having the dry film thickness T and the surface of the object is 20 or more

1] or [2].

[4] The method according to any one of [1] to [3], wherein the coating film formed of the colored coating material having the dry film thickness T has a concealment ratio of 0.90 to 0.98.

[5] The method according to any one of [1] to [4], wherein the content of the colored pigment is 0.01 to 3% by volume in the film forming component.

[6] The method according to any one of [1] to [5], wherein the content ratio of the monoepoxide compound (D) and the vinyl chloride copolymer (C) is 0.02 to 2.5 in mass ratio.

[7] The method according to any one of [1] to [6], wherein the monoepoxide compound (D) comprises an alkyl glycidyl ether compound.

[8] The method according to any one of [1] to [7], wherein the amine curing agent (B) is a polyamide amine.

[9] The method according to any one of [1] to [8], wherein the vinyl chloride-based copolymer (C) is a vinyl chloride-vinyl alkyl ether copolymer.

[10] The colored coating material according to any one of [1] to [10], further comprising a flaky pigment (G) having an average particle size of 10 to 300 μm, an average thickness of 2 to 50 μm, and an aspect ratio of 2 to 100 as defined as an average particle size / ,

The method according to any one of [1] to [9], wherein the content of the scaly pigment (G) in the coating film forming component is 5 to 45% by volume.

[11] The method according to [10], wherein the scaly pigment (G) is at least one kind of pigment selected from the group consisting of talc, mica and glass flake.

[12] A two-part type coloring type paint comprising a first agent and a second agent used for forming a dry coating film having a dry film thickness T on the surface of the article,

The following conditions (a) to (i)

  (a) a coating film formed of the coloring type paint having the dry film thickness T conceals the surface of the object,

  (b) a color difference DELTA E1 between a coating film formed of the colored coating film having the dry film thickness T and a coating film formed of the colored coating film having a dry film thickness of 0.7T is 2.0 or more,

  (c) contains a coloring pigment,

  (D) a bisphenol A epoxy resin (A), an amine curing agent (B), a vinyl chloride copolymer (C), a monoepoxide compound (D), a (meth) acrylate compound (E) Lt; / RTI >

  (e) the content of the vinyl chloride-based copolymer (C) is 5 to 50 parts by mass based on 100 parts by mass of the bisphenol A epoxy resin (A)

  (f) the content of the monoepoxide compound (D) is 2 to 50 parts by mass based on 100 parts by mass of the amine curing agent (B)

  (g) the first agent contains the bisphenol A-type epoxy resin (A) and the vinyl chloride-based copolymer (C)

  (h) the second agent contains the amine curing agent (B) and the monoepoxide compound (D)

  (i) the (meth) acrylate compound (E) comprises a vinyl ester resin

By weight.

[13] the following condition (j):

  (j) A color difference DELTA E2 between a coating film formed of the coloring type coating material having the dry film thickness T and a coating film formed of the coloring type coating material having a dry film thickness of 1.3T is less than 1

Is satisfied. ≪ / RTI >

[14] The following condition (k):

  (k) a color difference? E3 between the coating film formed of the coloring type coating material having the dry film thickness T and the surface of the object is 20 or more

Is further satisfied. [12] or [13].

[15] The coloring-type coating material according to any one of [12] to [14], wherein the coating film formed from the coloring-type coating material having the dry film thickness T has a concealment ratio of 0.90 to 0.98.

[16] The coloring type coating material according to any one of [12] to [15], wherein the content of the coloring pigment is 0.01 to 3% by volume in the coating film forming component.

[17] The coloring-type coating material according to any one of [12] to [16], wherein the content ratio of the monoepoxide compound (D) and the vinyl chloride copolymer (C) is 0.02 to 2.5 in mass ratio.

[18] The coloring-type coating material according to any one of [12] to [17], wherein the monoepoxide compound (D) comprises an alkyl glycidyl ether compound.

[19] The coloring-type coating material according to any one of [12] to [18], wherein the amine-based curing agent (B) is a polyamide amine.

[20] The coloring-type coating material according to any one of [12] to [19], wherein the vinyl chloride-based copolymer (C) is a vinyl chloride-vinyl alkyl ether copolymer.

[21] The coating composition according to any one of [1] to [20], further comprising a flaky pigment (G) having an average particle size of 10 to 300 μm, an average thickness of 2 to 50 μm, and an aspect ratio defined as an average particle size /

The coloring type coating material according to any one of [12] to [20], wherein the content of the scaly pigment (G) is 5 to 45% by volume in the coating film forming component.

[22] The coloring system paint according to [21], wherein the scaly pigment (G) is at least one kind of pigment selected from the group consisting of talc, mica and glass flake.

According to the present invention, it is possible to form a coating film having good adhesion to the top coat even when the top coat is applied for a long period of time. In other words, even when the top coat is coated with the good adhesion to the top coat, A coating composition formed using the coating composition, and a vessel and an offshore structure having the coating film can be provided. The anticorrosive coating composition of the present invention is useful as an anticorrosive coating applied to marine structures such as ships, bridges, tanks, and plants.

According to the present invention, it is possible to form a coating film having good adhesion to the top coat even when the top coat is applied for a long time, in other words, until coating the top coat while maintaining good adhesion to the top coat A coating film forming method capable of easily carrying out a coating operation by using an epoxy based anticorrosive coating composition capable of lengthening the period of time required for forming a dry film having a predetermined film thickness while suppressing insufficient film thickness, And a coloring type paint used therefor can be provided. The coloring-type coating material of the present invention is useful as a coating material for a system applied to, for example, offshore structures, marine structures such as bridges, tanks, and plants.

1 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 (Example 13 and Comparative Example 2).
2 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 (Examples 14 and 15).
FIG. 3 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 in a graph (Examples 16 to 18).
4 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 in a graph (Examples 19 to 21).
5 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 (Example 22).
6 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 (Example 23).
7 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 (Example 24).
8 is a graph showing the relationship between the dry film thickness (μm) and ΔE shown in Tables 4 to 6 (Graphs 25 and 26).

Hereinafter, the present invention will be described in detail.

<Anticorrosive coating composition>

The anticorrosive coating composition according to the present invention contains a bisphenol A type epoxy resin (A), an amine type curing agent (B), a vinyl chloride type copolymer (C), and a monoepoxide compound (D). Hereinafter, each component will be described in detail. On the other hand, hereinafter, the ability to maintain the good adhesion to the top coat and lengthen the period until the top coat is applied is called &quot; high interval adhesion. &Quot; The longer the period, the better the interval adhesion.

(1) Bisphenol A type epoxy resin (A)

Among the known epoxy resins, the anticorrosive coating composition contains a bisphenol A type epoxy resin (A). By using the bisphenol A type epoxy resin (A), it is possible to improve the low temperature curability of the anticorrosive coating composition and to improve the adhesiveness to substrates (substrates) such as blasted steel plates, shop painted steel plates and organic zinc- It is possible to obtain a good anticorrosion property. The bisphenol A type epoxy resin (A) may be used alone or in combination of two or more.

The anticorrosive coating composition may contain an epoxy resin other than the bisphenol A type epoxy resin (A). However, the content of the bisphenol A epoxy resin (A) in the total amount of the epoxy resin is preferably 50% by mass or more, more preferably 70% by mass or more from the viewpoints of low temperature curability, adhesion to the undercoat or top coat film , More preferably 90 mass% or more, and particularly preferably 95 mass% or more (for example 100 mass%). Examples of the epoxy resin other than the bisphenol A type epoxy resin (A) include bisphenol F type epoxy resin, bisphenol AD type epoxy resin, bisphenol S type epoxy resin, biphenyl type epoxy resin, naphthalene type epoxy resin, glycidyl Ester-type epoxy resins, glycidylamine-type epoxy resins, phenol novolak-type epoxy resins, and rubber-modified epoxy resins.

The epoxy equivalent of the bisphenol A type epoxy resin (A) is preferably 100 to 3000, more preferably 150 to 1000, and even more preferably 180 to 500. When the epoxy equivalent is 100 or more, good low temperature curability tends to be obtained and toughness of the resulting coating film tends to be good. If the epoxy equivalent is more than 3,000, the low temperature curability tends to be poor or the coating film tends to become hard.

The number average molecular weight of the bisphenol A type epoxy resin (A) is preferably 200 to 5000, more preferably 250 to 2000 in terms of a standard polystyrene equivalent value measured by gel permeation chromatography (GPC). When the number average molecular weight is within the above range, a conventional anticorrosion coating composition having excellent physical properties and coating workability is likely to be obtained.

The bisphenol A type epoxy resin (A) (solid content) is preferably contained in the solid content of the anticorrosive coating composition in an amount of 10 to 60 mass%, more preferably 15 to 55 mass%. If the content is 10% by mass or more, the corrosion resistance of the coating film tends to be good. When the content is 60% by mass or less, the coating film is not excessively hardened, and a conventional anticorrosion coating composition having excellent crack resistance, which is unlikely to cause problems such as cracking, tends to be obtained. If the content of the bisphenol A type epoxy resin (A) exceeds 60% by mass, the adhesion to the base and top coat films and the interval adhesion tends to be lowered.

(2) amine-based curing agent (B)

As the amine-based curing agent (B), conventionally known epoxy resin curing agents can be used. Specific examples of the amine-based curing agent (B) include a polyamine-based curing agent, a modified polyamine-based curing agent, a polyamide-based curing agent, a modified polyamide-based curing agent and the like. The amine-based curing agent (B) may be used alone or in combination of two or more.

Examples of the polyamine-based curing agent include aliphatic polyamines (meta-xylene diamine, isophorone diamine, diethylene triamine, triethylene tetramine, diaminodiphenyl methane, etc.); Alicyclic polyamines; Aromatic polyamines and the like. The modified polyamine-based curing agent is a modification of the above-mentioned polyamine, and examples thereof include aliphatic, alicyclic or aromatic aliphatic groups modified by epoxide addition, Michael addition, Mannich addition, thioether addition, acrylonitrile addition, Polyamines and the like.

Examples of the polyamide-based curing agent include polyamide amines produced by condensation of dimer acid and polyamine and having reactive first and second amino groups in the molecule. The polyamines forming the polyamide amine may be the aforementioned aliphatic polyamines, alicyclic polyamines, aromatic polyamines, and the like.

The modified polyamide-based curing agent is a modified polyamide, for example, an epoxy adduct formed by adding an epoxy compound to a polyamide, a Mannich-modified product of a modified polyamide, and the like.

Among them, the amine-based curing agent (B) preferably contains a polyamide amine in view of corrosion resistance, crack resistance, adhesion to the base and top coat, and interval adhesion. The content of the polyamide amine in the amine curing agent (B) is preferably 50% by mass or more, more preferably 70% by mass or more, further preferably 90% by mass or more, still more preferably 95% And most preferably 100% by mass (the amine-based curing agent (B) is a polyamide amine). From the viewpoints of crack resistance, adhesion to the base and top coat, etc., the polyamide amine is preferably an aliphatic polyamide amine such as a condensate of a dimeric acid and an aliphatic polyamine.

The amine equivalent of the amine-based curing agent (B) is usually from 50 to 1000, preferably from 100 to 800, more preferably from 150 to 655, and even more preferably from 180 to 500. If the amine equivalent of the amine-based curing agent (B) is within the above range, a conventional anticorrosion coating composition having excellent anticorrosive property, adhesion to the base and top coat, and excellent interval adhesion is easily obtained.

The amine-based curing agent (B) (solid content) is preferably contained in the solid content of the anticorrosive coating composition in an amount of 5 to 40 mass%, more preferably 7 to 30 mass%. When the content of the amine curing agent (B) is within the above range, it is advantageous in terms of corrosion resistance, crack resistance, adhesion to the base and top coat, interval adhesion, and coating workability. From the same viewpoint, the content ratio of the bisphenol A type epoxy resin (A) (solid content) to the amine type curing agent (B) (solid content) in the anticorrosive coating composition is preferably in the range of the equivalent ratio [epoxy group in the bisphenol A type epoxy resin Is preferably from 1 / 0.5 to 1.5, more preferably from 1 / 0.6 to 1.3, and still more preferably from 1 / 0.75 to 1.1 as the active hydrogen in the amine-based curing agent (B).

(3) Copolymer of vinyl chloride type (C)

The anticorrosive coating composition contains a vinyl chloride-based copolymer (C). The vinyl chloride-based copolymer (C) refers to a copolymer containing a constituent unit derived from vinyl chloride. By incorporating the vinyl chloride copolymer (C), it is possible to increase the interval adhesion, the adhesion to the base and top coat, the crack resistance, and the like. The vinyl chloride-based copolymer (C) may be used alone or in combination of two or more.

Specific examples of the vinyl chloride-based copolymer (C) include, for example, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl propionate copolymer, vinyl chloride-vinyl alkyl ether copolymer, vinyl chloride-acrylonitrile copolymer (Meth) acrylate copolymer, a vinyl chloride-styrene copolymer, a vinyl chloride-vinyl acetate copolymer, a vinyl chloride-diethyl maleate copolymer, a vinyl chloride-ethylene copolymer, a vinyl chloride-maleic anhydride copolymer, (Or maleic acid ester) copolymers, vinyl chloride-maleic acid ester copolymers, vinyl chloride-aliphatic vinyl copolymers, and the like, as well as copolymers of vinylidene chloride and vinyl chloride- .

The content of the constituent unit derived from vinyl chloride in the vinyl chloride copolymer (C) is preferably 50% by mass or more, more preferably 60% by mass or more, from the viewpoints of interval adhesion, Or more (for example, 70 mass% or more).

Among these, from the viewpoints of interval adhesion, adhesion to base and top coat, crack resistance, anticorrosiveness, compatibility with bisphenol A epoxy resin (A) and coating workability, vinyl chloride copolymer (C) Is preferably a vinyl chloride-vinyl alkyl ether copolymer. Examples of the vinyl chloride-vinyl alkyl ether copolymer include copolymers of vinyl chloride and alkyl vinyl ethers having 1 to 10, preferably 2 to 5 carbon atoms in the alkyl group. More specifically, vinyl chloride- Vinyl isobutyl ether copolymer, vinyl chloride-vinyl isopropyl ether copolymer, vinyl chloride-vinyl ethyl ether copolymer and the like are preferably used. More preferably, it is a vinyl chloride-vinyl isobutyl ether copolymer.

The weight average molecular weight of the vinyl chloride copolymer (C) is a value in terms of standard polystyrene calculated by GPC measurement, is usually 10,000 to 100,000, preferably 20,000 to 50,000, and more preferably 23,000 to 400,000. If the weight average molecular weight of the vinyl chloride-based copolymer (C) is within the above range, the adhesion to the base and top coat, crack resistance, anticorrosiveness, compatibility with the bisphenol A type epoxy resin (A) It is advantageous in enhancing workability and the like.

The content of the vinyl chloride copolymer (C) (solid content) in the anticorrosive coating composition is 5 to 50 parts by mass, preferably 10 to 45 parts by mass, per 100 parts by mass of the bisphenol A type epoxy resin (A) (For example, 10 to 40 parts by mass). The content of the vinyl chloride-based copolymer (C) is 5 parts by mass or more, whereby the adhesion to the base and top coat, the crack resistance, the anticorrosiveness, the compatibility with the bisphenol A type epoxy resin (A) It is possible to obtain an effect of improving workability and the like. If the content of the vinyl chloride-based copolymer (C) exceeds 50 parts by mass, the effect of improving the adhesion to the phase coat or the interval adhesion may become insufficient or may be deteriorated in some cases.

The vinyl chloride-based copolymer (C) (solid content) is preferably contained in an amount of 1 to 30 mass%, more preferably 2 to 20 mass% (for example, 2.5 to 15 mass%) in the solid content of the anticorrosive coating composition . When the content of the vinyl chloride-based copolymer (C) is within the above range, the adhesion to the base and top coat, crack resistance, anticorrosiveness, compatibility with the bisphenol A type epoxy resin (A) And the like.

(4) The monoepoxide compound (D)

The anticorrosive coating composition contains a monoepoxide compound (D). The monoepoxide compound (D) refers to a compound having one epoxy group in the molecule. With the anticorrosive coating composition containing the vinyl chloride-based copolymer (C) and the monoepoxide compound (D), the interval adhesion can be further improved by their synergistic effect. The monoepoxide compound (D) may be used alone, or two or more thereof may be used in combination.

According to the anticorrosive coating composition of the present invention, it is presumed that the incorporation of the monoepoxide compound (D) in addition to the vinyl chloride copolymer (C) improves the interval adhesion by the following action . That is, when the vinyl chloride copolymer (C) is contained as described above, it is possible to improve the interval adhesion of the anticorrosive coating composition, thereby improving the adhesion property of the anticorrosive coating composition comprising the anticorrosive coating composition (C) is not influenced by exposure to light (ultraviolet ray or the like) or oxygen during the period until coating of the top coat is completed, since the period from the formation of the upper coating to the coating of the upper coating can be extended Which may lead to a sequential decomposition reaction. It is considered that this decomposition reaction (dehydrochlorination reaction) is promoted by the active hydrogen contained in the free amine derived from the amine curing agent (B) which may remain in the anticorrosive coating film. Since the monoepoxide compound (D) reacts with the free amine by consuming the monoepoxide compound (D) by incorporating the monoepoxide compound (D) into the anticorrosive coating composition, It is considered that acceleration of the dehydrochlorination reaction of the cohesion (C) is suppressed, and as a result, interval adhesion is improved.

A suitable example of monoepoxide compound (D) is monoglycidyl ether, and specific examples thereof include alkyl glycidyl ether, phenyl glycidyl ether (alkylphenyl glycidyl ether, etc.). The alkyl group of the alkyl glycidyl ether and the alkylphenyl glycidyl ether has usually 1 to 20 carbon atoms, preferably 5 to 18 carbon atoms, and more preferably 10 to 16 carbon atoms. The epoxy equivalent of the monoepoxide compound (D) is usually 50 to 1000, preferably 100 to 600, and more preferably 150 to 500. Above all, the monoepoxide compound (D) is preferably an alkyl glycidyl ether from the viewpoint of improving the interval adhesion.

The content of the monoepoxide compound (D) (solid content) in the anticorrosive coating composition is from 2 to 50 parts by mass, preferably from 4 to 48 parts by mass (per 100 parts by mass of the amine-based curing agent (B) For example, 5 to 47 parts by mass). When the content of the monoepoxide compound (D) is 2 parts by mass or more, it is possible to obtain an effect of further improving the interval adhesion as compared with the case where the monoepoxide compound (D) is not contained. If the content of the monoepoxide compound (D) exceeds 50 parts by mass, the corrosion resistance and hardness of the coating film may be lowered.

(Monoepoxide compound (D) / vinyl chloride copolymer (C)) of the monoepoxide compound (D) [solid component] and the vinyl chloride copolymer (C) [solid component] , The mass ratio] is preferably from 0.02 to 2.5, more preferably from 0.03 to 2.0, and still more preferably from 0.05 to 1.9 from the viewpoint of improvement in the interval adhesion. From the same viewpoint, the content ratio of the monoepoxide compound (D) (solid content) and the amine-type curing agent (B) (solid content) in the anticorrosive coating composition is such that the equivalent ratio [epoxy group / Is preferably from 1 / 0.01 to 0.4, more preferably from 1 / 0.02 to 0.3, and still more preferably from 1 / 0.03 to 0.25, as the active hydrogen in the amine-based curing agent (B).

The monoepoxide compound (D) (solid content) is preferably contained in an amount of 0.1 to 15 mass%, more preferably 0.2 to 10 mass% (for example, 0.5 to 8 mass%) in the solid content of the anticorrosive coating composition . When the content of the monoepoxide compound (D) is within the above range, it is advantageous in increasing the interval adhesion.

(5) (Meth) acrylate Compound (E)

The anticorrosive coating composition may contain (meth) acrylate compound (E), if necessary. (Meth) acrylate compound (E) refers to a compound having at least one (meth) acryloyl group in the molecule. By incorporating the (meth) acrylate compound (E), it is possible to improve the interval adhesion, the adhesion to the base and top coat, the anticorrosiveness, the curability and the like. The (meth) acrylate compound (E) may be used alone or in combination of two or more. In the present specification, the term "(meth) acryloyl group" refers to at least one member selected from methacryloyl and acryloyl. The same applies to "(meth) acrylic".

An example of the (meth) acrylate compound (E) is a (meth) acrylic acid alkyl ester such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate and butyl (meth) acrylate. The number of carbon atoms in the alkyl moiety is preferably from 1 to 10, more preferably from 1 to 5.

Another example of the (meth) acrylate compound (E) is at least one compound selected from the group consisting of ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (Meth) acrylate, nonaethylene glycol di (meth) acrylate, tetradecaethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hexane diol di (Meth) acrylate, trimethylol propane tri (meth) acrylate, trimethylol propane ethylene oxide adduct tri (meth) acrylate, trimethylol propane propylene oxide adduct tri (meth) Glycerin tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol (Meth) acrylate, pentaerythritol tri (meth) acrylate, tolylene diisocyanate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (Meth) acrylic compound such as a 2: 1 adduct of cyanate.

Another example of the (meth) acrylate compound (E) is a vinyl ester resin (epoxy (meth) acrylate) obtained by the reaction of an epoxy resin with (meth) acrylic acid. The epoxy resin may be a bisphenol A type epoxy resin, or a bisphenol A type epoxy resin, although it may be another epoxy resin as described above in the section of "(1) bisphenol A type epoxy resin (A)".

Among them, the (meth) acrylate compound (E) is preferably a vinyl ester resin, more preferably a bisphenol A type vinyl ester resin, from the viewpoints of the adhesion with time, the adhesion to the base and the top coat, the anticorrosiveness, desirable. The number average molecular weight of the vinyl ester resin is preferably 1,000 to 5,000, more preferably 1,000 to 3,000, in terms of standard polystyrene conversion by GPC measurement. When the number average molecular weight of the vinyl ester resin is within the above range, it is advantageous in increasing the adhesion with time, adhesion to the base and top coat, anticorrosive property, curability and the like.

(Meth) acrylate compound (E) (solid content) is preferably contained in an amount of 0.2 to 15 mass%, more preferably 0.5 to 10 mass% (for example, 1 to 6 mass%) in the solid content of the anticorrosive coating composition Do. When the content of the (meth) acrylate compound (E) is within the above range, it is advantageous in increasing the adhesion with time, adhesion to the base and top coat, anticorrosive property, curability and the like. For the same reason, the content of the (meth) acrylate compound (E) (solid content) in the anticorrosive coating composition is preferably 5 to 25 parts by mass based on 100 parts by mass of the bisphenol A type epoxy resin (A) More preferably 10 to 20 parts by mass (for example, 10 to 16 parts by mass).

(6) Silane coupling agent (F)

The anticorrosive coating composition may contain a silane coupling agent (F) if necessary. By incorporating the silane coupling agent (F), it is possible to improve the interval adhesion, the adhesion to the base and top coat, the anticorrosiveness, the curability and the like. The silane coupling agent (F) may be used alone or in combination of two or more.

A suitable example of the silane coupling agent (F) is an alkoxysilane compound. Examples of the alkoxysilane compound include? -Glycidyloxyalkyltrialkoxysilane such as? -Glycidyloxypropyltrimethoxysilane and? -Glycidyloxypropyltriethoxysilane; γ-aminoalkyltrialkoxysilanes such as γ-aminopropyltriethoxysilane and γ-aminopropyltripropoxysilane; Phenyl-gamma -amino-N-phenyl-gamma -aminopropyltrimethoxysilane, N-phenyl- gamma -aminopropyltriethoxysilane and N-phenyl- gamma -aminopropyltripropoxysilane. Alkyl trialkoxysilane, and the like.

The silane coupling agent (F) (solid content) is preferably contained in an amount of 0.1 to 15 mass%, more preferably 0.2 to 10 mass% (for example, 1 to 5 mass%) in the solid content of the anticorrosive coating composition. When the content of the silane coupling agent (F) is within the above range, it is advantageous in increasing the adhesion of the interval, the adhesion to the base and top coat, the anticorrosiveness and the curability.

(7) Other ingredients

The anticorrosive coating composition may contain one or more other components as needed. Examples of other blending components include thermoplastic resins, solvents, pigments, anti-sagging agents (anti-settling agents), anti-coloring agents, antifoaming agents, foaming agents, film forming aids, ultraviolet absorbers, antioxidants, A surfactant, a preservative, a reactive diluent, a non-reactive diluent, and the like. As the thermoplastic resin, for example, a petroleum resin, a (meth) acrylic resin, a polyester resin or the like can be used. By containing a thermoplastic resin, physical properties of the coating film may be improved.

As the solvent, those generally used in the art can be used, and examples thereof include toluene, xylene, isobutanol, methyl ethyl ketone, and methyl isobutyl ketone. Two or more mixed solvents may be used.

Examples of the pigment include a coloring pigment, an extender pigment, and a rust preventive pigment. Specific examples of the coloring pigment include titanium oxide, carbon black, zinc white, graphite, zinc sulfide, zinc oxide (zinc oxide), chromium oxide, yellow nickel titanium, yellow chromium titanium, yellow iron oxide, Black iron oxide, phthalocyanine blue, phthalocyanine green, ultramarine blue, benzimidazolone yellow, quinacridone red, azo type yellow pigment and the like. Two or more kinds of coloring pigments may be used.

Specific examples of extender pigments include talc, clay, calcium carbonate, magnesium carbonate, barium sulfate, silicic acid, silicate, alumina, calcium sulfate, mica iron oxide (MIO), glass flake, mica (aquarium light mica, Etc.). Two or more extender pigments may be used.

Specific examples of the anticorrosive pigment are zinc molybdate, zinc molybdate, aluminum cyanide, lead, lead zinc oxide, zinc chromate, zinc oxide (Zn), zinc oxide (zinc oxide) Lead sulfate, basic lead sulfate, calcium lead acid, aluminum tri-polyphosphate, zinc phosphate, calcium phosphate, aluminum powder (Al), half gypsum and the like. Two or more kinds of rustproof pigments may be used.

(8) Preparation of anticorrosive coating composition

The anticorrosive coating composition according to the present invention can be prepared in the same manner as a general anticorrosive paint using an epoxy resin. The anticorrosive coating composition according to the present invention is preferably a two-component paint composition. The two-pack type anticorrosion coating composition is composed of a first agent (a subject) containing at least a bisphenol A type epoxy resin (A) and a second agent (a curing agent) containing at least an amine curing agent (B). The first agent and the second agent may all contain a solvent. In the two-part type anticorrosive coating composition, the first agent and the second agent are mixed immediately before use and coated on the substrate.

(C), the monoepoxide compound (D), the (meth) acrylate compound (E), the silane coupling agent (F), and other components contained in the two- Or may be incorporated in either the first agent or the second agent, or both of them. Usually, the (meth) acrylate compound (E) and the silane coupling agent (F) are compounded in the first agent.

In one preferred embodiment according to the two-part type anticorrosive coating composition, the vinyl chloride-based copolymer (C) is contained in the first agent (the subject), the monoepoxide compound (D) . This makes it possible to enhance the interval adhesion as compared with the case where the vinyl chloride copolymer (C) and the monoepoxide compound (D) are contained together in the first agent.

(9) Coating of anticorrosive coating composition

Coating of the anticorrosive coating composition on the substrate can be carried out by a general method such as brushing, roller or spraying. In the case of a two-pack type coating composition, the coating composition obtained by mixing the first and second agents immediately before use is coated using the above-mentioned method. Coating of the coating composition obtained by mixing the first agent and the second agent is carried out within a potable time after the mixing of the first agent and the second agent. The anticorrosive coating composition of the present invention typically exhibits a pot life of about 30 minutes to 8 hours. After coating, drying treatment can be performed to form the anticorrosive coating film. The drying temperature is usually room temperature (about 20 to 35 占 폚), but it may be performed at a lower temperature.

The object (the object onto which the anticorrosive coating composition is painted) is not particularly limited as long as it requires a method. Examples of the object (the surface in the ballast tank of the ship, the bottom of the ship, Plant (oil plant, etc.), offshore structure such as pipe. The material of the surface of the substrate on which the anticorrosion coating composition is coated may be, for example, an iron-based metal such as steel, a non-ferrous metal, a coating film composed of a coating such as concrete, An old coating means a coating film or a part thereof previously formed and provided for use.

The anticorrosive coating composition according to the present invention can be suitably applied to a coating method (a method for producing a composite coating film) in which a top coat film is formed on a surface of a substrate, followed by forming a top coat film thereon. In this method, the anticorrosive coating composition according to the present invention can be used for forming the undercoating film. The undercoating film may be a laminated structure of a plurality of coating films. In this case, the anticorrosive coating composition according to the present invention is used at least for forming the outermost coating film (in contact with the topcoat film).

Antistatic paints, shop paints, coatings obtained by applying organic or inorganic zinc primers, and the like, which can be used as the undercoat of the undercoating film made of the anticorrosive coating composition according to the present invention. The surface of the substrate may be blast-treated.

The thickness of the anticorrosion coating formed from the anticorrosion coating composition according to the present invention may be appropriately determined depending on the kind of the anticorrosion coating, application, etc., but is usually about 10 to 500 탆 in dry film thickness. In addition, the anticorrosion coating formed from the anticorrosion coating composition according to the present invention may be coated with the antistatic composition several times to form a dry coating having a desired thickness. The amount of coating at that time is not particularly limited, and it is usually coated so that the dried film thickness of each coating film is 10 to 500 mu m. In the case of overcoating a plurality of times, it is possible to obtain a dry coating film having a desired film thickness by forming a plurality of wet coating films by overlaying and drying, and by forming a plurality of dry coating films, .

As the top coat used in the top coat formed on the anticorrosive coating film, those generally used in anticorrosion coating can be used. Specific examples of the top coat include oil-based paints, long oily phthalic acid resin paints, silicone alkyd resin paints, phenol resin paints, chlorinated rubber resin paints, epoxy resin paints, modified epoxy resin paints, tar epoxy resin paints, Resin paints, polyurethane paints, fluorine resin paints, silicone modified resin paints, antifouling paints for preventing biofouling, and the like. Examples of the antifouling coating include an acrylic resin antifouling paint and a vinyl resin antifouling paint. The top coat is preferably an epoxy resin coating, a polyurethane resin coating, a fluororesin coating, an acrylic resin-based antifouling coating, a vinyl resin-based antifouling coating or the like. The dried film thickness of the top coat is usually about 10 to 300 mu m.

The top coat may also be an anticorrosive coating composition according to the present invention. An embodiment in which the anticorrosive coating composition of the present invention is an upper paint is characterized in that a coating film composed of the anticorrosive coating composition according to the present invention is formed on the old coating film formed of the anticorrosive coating composition according to the present invention, . On the other hand, the anticorrosive coating composition according to the present invention can be used not only as an undercoat but also as a top coat. The dry film thickness of the top coat formed from the anticorrosion coating composition according to the present invention is usually about 10 to 300 mu m.

The anticorrosion coating formed from the anticorrosion coating composition according to the present invention can be applied to an antistatic coating film formed of the coloring-type anticorrosive coating or to a top coating film formed of the other antistatic coatings described above, while securing good anticorrosion property and crack resistance It is possible to exhibit good adhesiveness and exhibit good interval adhesion.

<Coloring system paint>

The coloring type coating material (colored type coating material composition) according to the present invention can be used in a coating film forming method according to the present invention described in detail later. A method for forming a coating film according to the present invention is a method for forming a dried coating film on a surface of a substrate,

A step of setting the dry film thickness T (dry film thickness setting step)

As a two-part type coloring type coating material comprising the first and second agents, a step of preparing or preparing a coloring type coating material satisfying the following conditions (a) to (i)

A step (coating step) of applying a coloring-type coating material to the surface until the surface of the object is concealed by a coating film made of a coloring-type coating material, and

A step of drying the coating film (wet coating film) obtained by the coating step to obtain a dried coating film (drying step)

.

In the coating film forming method according to the present invention, a predetermined coloring type coating material (coloring type coating material composition) is used as a coating material for forming a dry coating film. This coloring-type coating material is a coating material having a &quot; film thickness determining function &quot; which can determine whether or not a predetermined film thickness has been reached by observing the hue of a coating film (wet coating film) during coating. Hereinafter, the coloring type coating material according to the present invention will be described in detail.

The coloring-type coating material according to the present invention is a two-part type anticorrosive coating composition comprising a first agent and a second agent. The colored coating material according to the present invention contains a colored pigment (condition (c)). The coloring type coating material is a coating composition comprising a bisphenol A type epoxy resin (A), an amine type curing agent (B), a vinyl chloride type copolymer (C), a monoepoxide compound (D), a (meth) E) (condition (d)). The first agent of the colored coating composition contains the bisphenol A type epoxy resin (A) and the vinyl chloride type copolymer (C) (condition (g)) and the second agent contains the amine type curing agent (B) and the monoepoxide compound D) (condition (h)). Hereinafter, each component will be described in detail.

(1) Bisphenol A type epoxy resin (A)

The first agent (base) of the colored coating material contains a bisphenol A type epoxy resin (A). The bisphenol A type epoxy resin (A) contained in the first agent of the tinting type paint is cited in the description of "(1) bisphenol A type epoxy resin (A)" of the above <anticorrosive coating composition>.

(2) amine-based curing agent (B)

As the amine curing agent (B) contained in the second agent, conventionally known epoxy resin curing agents can be used. As for the amine curing agent (B) contained in the second agent, the technique of (2) the amine curing agent (B) of the above <anticorrosive coating composition> is cited.

(3) Copolymer of vinyl chloride type (C)

The first agent of the colored coating material contains the vinyl chloride-based copolymer (C). As to the vinyl chloride-based copolymer (C) contained in the first agent, the technique of the &quot; (3) vinyl chloride-based copolymer (C) &quot; The content of the vinyl chloride-based copolymer (C) (solid content) in the coloring type coating material is preferably 5 to 50 parts by mass per 100 parts by mass of the bisphenol A type epoxy resin (A) (solid content) Is 10 to 45 parts by mass (for example, 10 to 40 parts by mass).

(4) The monoepoxide compound (D)

The second agent of the coloring type coating material contains the monoepoxide compound (D). As to the monoepoxide compound (D) contained in the second agent, the technique of the &quot; (4) monoepoxide compound (D) &quot; of the &quot; anticorrosive coating composition &quot; The content of the monoepoxide compound (D) (solid content) in the coloring type coating material is 2 to 50 parts by mass with respect to 100 parts by mass of the amine curing agent (B) (solid content), and [condition (f)], 4 to 48 parts by mass (for example, 5 to 47 parts by mass).

(5) (Meth) acrylate Compound (E)

The color scheme paint contains a (meth) acrylate compound (E). As to the (meth) acrylate compound (E), the technique of the (5) (meth) acrylate compound (E) of the <anticorrosive coating composition> is cited. (Meth) acrylate compound (E) contains a vinyl ester resin (condition (i)), preferably bisphenol A-type vinyl ester resin Ester resin.

(6) Silane coupling agent (F)

The color scheme coating material may contain a silane coupling agent (F) as required. As to the silane coupling agent (F), the technique of the (6) silane coupling agent (F) of the above &quot; anticorrosive coating composition &quot; is cited.

(7) Coloring pigments

As the coloring pigment contained in the coloring type coating material, various conventionally known coloring pigments can be used, and a coloring type coating material of various colors can be realized by selecting a coloring pigment. The kind of the coloring pigment to be added to the coloring type coating material (color of the coloring type coating material) can be selected in accordance with the color of the surface (the surface to be coated) of the coloring material, It is preferable to select the kind or combination of the coloring pigment so that the color difference? E3 of the surface is 20 or more. On the other hand, the color of the coating film formed of the coloring type coating material having the dry film thickness T is substantially the same as that of the coloring type coating material itself, for example, if it is a usual solvent type coating material free from color separation.

Specific examples of the colored pigment include, but not limited to, carbon black, titanium dioxide, zirconium oxide, basic sulfuric acid lead, tin oxide, zinc white, graphite, zinc sulfide, zinc oxide, chromium oxide, yellow nickel titanium, , Yellow iron oxide, red iron oxide, black iron oxide, chromium yellow, phthalocyanine blue, phthalocyanine green, ultramarine blue, quinacridone, azo type yellow pigment and the like can be used. The coloring pigment may be used alone, or two or more kinds may be used in combination.

Among them, carbon black and titanium dioxide are preferably used because coloring power is high, and it is more preferable that the coloring pigment includes titanium dioxide. In the case of using only titanium dioxide as a coloring pigment, the coating film becomes pale. To avoid this, other coloring pigments may be used in combination.

Particularly, in the coloring type coating material of the present invention for forming a coating film as a thick film, it is necessary to have a relatively small hiding concealment property, and therefore it is preferable that the content of the coloring pigment is relatively small. Specifically, the content of the colored pigment is usually 0.01 to 3% by volume, preferably 0.1 to 2% by volume in the film forming component. If the content of the colored pigment is too small, the undercoat hiding power is too small, and the color change of the wet coating film during coating becomes excessively small, and it becomes difficult to judge whether or not it has reached the specified film thickness. On the other hand, if the content of the colored pigment is too large, the undercoating force is excessively large, and the coating film conceals the surface of the coating before reaching the set value T of the target dry film thickness, It is difficult to judge whether or not it is possible. In the present specification, the term &quot; coating film forming component &quot; means all components other than the solvent contained in the coloring type coating material.

(8) Pigments other than coloring pigments

The coloring type coating material may contain a pigment other than the coloring pigment as required. Examples of the pigments other than the colored pigments include extender pigments and rust-preventive pigments. Specific examples of extender pigments include talc, clay, calcium carbonate, magnesium carbonate, barium sulfate, silicic acid, silicate, alumina, calcium sulfate, mica iron oxide (MIO), glass flake, mica Mica, etc.) and the like. Two or more extender pigments may be used.

Specific examples of the anticorrosive pigment include calcium sulfate half-salt, molybdenum zinc, molybdenum aluminum, cyanamide lead, cyanamide calcium zinc, lead, lead oxide, zinc chromate, strontium chromate, barium chromium (Zinc), zinc oxide (zinc oxide), basic lead chromate, basic lead sulphate, calcium lead, aluminum triphosphate, zinc phosphate, calcium phosphate, calcium phosphite, lead trioxide, lead sulfide, aluminum powder ), Half gypsum, and the like. Two or more kinds of rustproof pigments may be used.

When the dry film thickness T set in the dry film thickness setting process is selected from the range of 300 mu m or more, the colored coating material preferably has an average particle diameter of 10 to 300 mu m, an average thickness of preferably 2 to 50 mu m, an average particle diameter / (Flat pigments) pigment (hereinafter, simply referred to as &quot; scaly pigment &quot;) G having an aspect ratio defined as a thickness of preferably 2 to 100 is preferably contained. The definition of the average particle diameter, the average thickness and the aspect ratio and the measurement method are as described in the section of the embodiment. Hereinafter, the scaly pigment (G) and its function will be described.

The film thickness determination paints described in Patent Documents 4 and 5 are all used to form a coating film having a target dry film thickness (dry film thickness T) of 100 m or more, and the content of the coloring pigment contained therein is adjusted , It is a paint prepared so as to satisfy the following relationship with respect to color difference.

(a) Determination of Film Thickness When the color difference between the paint and the substrate is 20 or more,

(b) a color difference between a coating film having a target dry film thickness and a film having a dry film thickness less than a target dry film thickness (-50)

(c) The color difference of the dry film thickness of the target dry film thickness (target dry film thickness + 50) μm or more is less than 1.

Particularly, (b) is particularly important, and if the color of the coating film, which is considerably close to the target film thickness, and the color difference of the coating film reaching the target film thickness are not clear, the coating worker should be aware that the wet coating film It becomes difficult to visually determine whether the film thickness of the target has been reached or whether the film thickness is still short.

Therefore, it can be said that the larger the color difference of the coating film which has reached the film thickness of the target and the film thickness of the target which is considerably close to the target film thickness, the easier to determine the film thickness. However, in the case of forming a considerably thick coating film by one- It can be a problem that it is difficult. More specifically, if the target dry film thickness of the coated film formed by one coat is up to about 250 탆 (the target dry film thickness in the example of Patent Document 4 is 125 탆, and the target dried film in the example of Patent Document 5 It is possible to relatively easily determine the film thickness in forming the coating film having a desired film thickness by increasing the color difference to some extent according to the preparation method described in these patent documents.

On the other hand, conventionally, a coating film which is a thick film exceeding 250 탆 has been formed on the substrate. Typical examples are marine structures such as ships and bridges, and anticorrosive coatings (rust-preventive coatings) formed on the surfaces of forcing structures such as plants. Conventionally, however, such a thick film as a thick film is usually formed by a plurality of coatings (a coating method in which a series of steps of coating → drying are repeated a plurality of times to coat a dry coating film), instead of a single coating.

However, when a coating method for forming a thick film having a thickness of 300 탆 or more, for example, as a thick film rather than a plurality of times has been adopted in recent years, it is difficult to achieve a desired film thickness It has been found that it is difficult to sufficiently increase the color difference of the coating film and it is not necessarily easy to determine whether the wet coating film has reached the target film thickness or whether the film thickness is still insufficient.

When the dry film thickness T set in the drying film thickness setting step is selected from the range of 300 mu m or more, the significance of incorporating the scaly pigment (G) into the coloring type coating material is as follows. In order to increase the strength of the coating film or to enhance the corrosion resistance of the anticorrosive coating in paint (anticorrosive paint or the like), it is a common practice to include an extender pigment, and a film thickness determination paint containing both extender pigment and colored pigment (Patent Documents 4 and 5). However, in the conventional film thickness determining paint, when applied to a method of forming a thick film as a single coat as described above, it is possible to obtain a coating film which is considerably close to the target film thickness (the set value T of the target dry film thickness) It is difficult to sufficiently increase the color difference of the coating film that has reached the film thickness of the target and it is not always easy to determine whether the wet coating film has reached the target film thickness or whether the film thickness is still insufficient.

If the dry film thickness is increased, the ΔE (so-called exponential function) suddenly monotonously decreases and the area of the bottom of the graph, that is, the set value T of the dry film thickness and the near- (That is, a state in which the color difference of the coating film which has reached the film thickness of the target and the film thickness of the target which is considerably close to the film thickness of the target is extremely small). This problem becomes more pronounced as the thickness of the coating film formed by the first coating is larger. This is because as the set value T of the dry coating film thickness is increased, the base area in which the difference ΔE hardly occurs spreads widely.

On the other hand, according to the coloring type paint containing the scaly pigment (G) and the method for forming a coating film using the same, the graph of the dry film thickness versus ΔE Is not a rapid exponential decrease in exponential function but adopts the same shape as that in which the value of ΔE is slightly increased in comparison with the shape of abrupt monotonous decrease between the dry film thickness of 0 μm and the set value T of the dry film thickness. By such a shape, even when the dry film thickness T is selected from the range of 300 mu m or more, the condition "the condition (b) that the color difference DELTA E1 between the coating film having the dry film thickness T and the coating film having the dry film thickness of 0.7T is 2.0 or more" ), That is, it becomes possible to sufficiently increase the color difference of the coating film that has reached the target film thickness (the set value T of the target dry film thickness) and the coating film that has reached the target film thickness, It becomes possible to easily determine whether the coating film has reached the film thickness of the target or whether the film thickness is still short.

Although the reason why the graphical shape is as described above is not clear, the inherent extender pigment absorbs light and interferes with the transmission of light. As a result, the scaly pigment G is oriented in the direction of the surface of the coating film The longer diameter direction of the pigment tends to be oriented in the plane direction of the coating film), and it is conceivable that the light tends to be transmitted through the scaly pigment G. This is considered to be a factor as long as it becomes the above-mentioned graph shape.

The average particle size of the scaly pigment (G) is preferably 10 to 300 mu m, more preferably 10 to 200 mu m, and still more preferably 10 to 150 mu m, from the viewpoints of satisfying the condition (b) to be. If the average particle size is less than 10 mu m, it may be difficult to realize the condition (b) when the dry film thickness T set in the dry film thickness setting step is selected from the range of 300 mu m or more. On the other hand, if the average particle diameter is less than 10 mu m, oil absorption of the scaly pigment (G) increases, and the paint viscosity increases accordingly, so that the coating workability tends to decrease. Even when the average particle size exceeds 300 mu m, when the dry film thickness T is selected from the range of 300 mu m or more, the above-mentioned condition (b) tends to be difficult to achieve and the surface smoothness of the coating film tends to be impaired.

The aspect ratio of the scaly pigment (G) is preferably 2 to 100 from the viewpoints of the satisfaction of the condition (b) and the properties of the coating material. It is easy for the aspect ratio to be higher to some extent to increase the aforementioned graph, and therefore the aspect ratio is more preferably 3 or more, and more preferably 4 or more. When the dry film thickness T is selected from the range of 300 mu m or more, the aspect ratio of less than 2 is disadvantageous in the realization of the condition (b). On the other hand, if the aspect ratio is excessively large, the effect of reinforcing the coating film by the scaly pigment tends to be insufficient, and the strength and the corrosion resistance of the coating film are likely to be deteriorated. Therefore, the aspect ratio is more preferably 20 or less.

The average thickness of the scaly pigment G is preferably 2 to 50 mu m. The preferable range of the average thickness may be a range derived from a preferable range of the average particle diameter and a preferable range of the aspect ratio, and may be, for example, in a range of from 2 to 30 m (for example, from 2 to 20 m).

The scaly pigment (G) preferably has a refractive index of 1.8 or less, more preferably 1.7 or less, and even more preferably 1.6 or less. The condition (b) can be more easily realized by reducing the refractive index and suppressing light reflection at the interface between the binder resin (epoxy resin) and the scaly pigment G in the coating film and increasing the light transmission amount. The measurement method of the refractive index is as described in the section of the embodiment.

The scaly pigment (G) may be an extender pigment, specifically, talc, mica (mica), clay, glass flake, aluminum hydroxide and the like. It is preferably talc, mica (mica), clay, glass flake, more preferably talc, mica (mica), glass flake. The coloring type coating material may contain one or more than two kinds of scaly pigment (G).

The coloring type coating material may contain an extender pigment other than the scaly pigment (G). The other extender pigment may be a flat extender pigment in which at least one of an average particle diameter, an average thickness or an aspect ratio does not satisfy the predetermined range, or may be a granular extender pigment having an aspect ratio of 1 or about 1. Other extender pigments may be the same material as the scaly pigment (G) or may be of different materials. Specific examples thereof include, in addition to those described for the scaly pigment (G), calcium carbonate, magnesium carbonate, barium sulfate, , Bentonite, silicic acid, silicate, aluminum oxide hydrate, and calcium sulfate. The coloring type coating material may contain one kind or two or more kinds of other extender pigments.

The content of the scaly pigment (G) is preferably 5 to 45% by volume, more preferably 10 to 40% by volume (for example, 15 to 35% by volume) in the film forming component. If the content of the scaly pigment (G) is less than 5% by volume, it is difficult to obtain the above-mentioned effect of blending it, and when the other extender pigment is not used in combination, the reinforcing effect of the coating film becomes insufficient, The corrosion resistance tends to become insufficient. If it exceeds 45% by volume, the film-forming property tends to be lowered.

When the scaly pigment (G) is used together with other extender pigments, the total content thereof is preferably 45% by volume or less in the coating film forming component. When the scaly pigment (G) is used in combination with other extender pigments, the content of the scaly pigment (G) in the total content thereof is preferably 10% by volume or more from the viewpoint of satisfying the condition (b) More preferably 20% by volume or more, and more preferably 30% by volume or more.

When the dry film thickness T set in the drying film thickness setting process is selected from the range of less than 300 mu m, the coloring type coating material may or may not contain the scaly pigment (G).

(9) Other ingredients

The coloring-type coating material may contain one or more other blending components as required. Examples of other mixing components include thermoplastic resins, solvents, anti-sagging agents (anti-settling agents), anti-coloring agents, anti-foaming agents, anti-foaming agents, film forming agents, ultraviolet absorbers, antioxidants, leveling agents, , Viscosity adjusting agents, surface conditioners, plasticizers, preservatives, reactive diluents, non-reactive diluents, and the like. As the thermoplastic resin, for example, a petroleum resin, a (meth) acrylic resin, a polyester resin or the like can be used. By containing a thermoplastic resin, physical properties of the coating film may be improved. It is preferable that the content of the other compounding ingredients does not deteriorate the clear color or the hiding concealability of the colored pigment and does not deteriorate the function of determining the film thickness of the colored coating material.

As the solvent, an organic solvent can be suitably used. Examples thereof include aromatic hydrocarbons such as toluene, xylene and ethylbenzene; Aliphatic or alicyclic hydrocarbons such as cyclopentane, octane, heptane, cyclohexane and white spirit; Petroleum oils which are mainly composed of aliphatic hydrocarbons and which can exhibit various boiling ranges with a few aromatic hydrocarbons; Ethers such as dioxane, tetrahydrofuran, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, diethylene glycol monomethyl ether, and diethylene glycol monoethyl ether; Esters such as butyl acetate, propyl acetate, benzyl acetate, ethylene glycol diacetate, 2-ethoxy ethyl acetate, ethylene glycol monomethyl ether acetate and ethylene glycol monoethyl ether acetate; Ketones such as methyl ethyl ketone, ethyl isobutyl ketone, and methyl isobutyl ketone; n-butanol, i-butanol, t-butanol, n-propanol, i-propanol and benzyl alcohol. The solvent may be used alone, or two or more solvents may be used in combination.

(10) Preparation of coloring paint

The coloring type coating material according to the present invention can be prepared in the same manner as a general type of coating material using an epoxy resin. The coloring type coating material according to the present invention is a two-part type, and contains a first agent (subject) containing at least a bisphenol A type epoxy resin (A) and a vinyl chloride type copolymer (C), an amine type curing agent (B) And a second agent (curing agent) containing at least the side compound (D). The first agent and the second agent may all contain a solvent. Normally, the first agent and the second agent are mixed immediately before use and coated on the substrate.

In the two-part type coloring type paint, the other compounding ingredients including the (meth) acrylate compound (E), the silane coupling agent (F) and the pigment may be incorporated in either the first or second agent Or both of them may be blended. Usually, the (meth) acrylate compound (E) and the silane coupling agent (F) are compounded in the first agent.

The vinyl chloride-based copolymer (C) is contained in the first agent (the subject), and the monoepoxide compound (D) is contained in the second agent (curing agent). This makes it possible to enhance the interval adhesion as compared with the case where the vinyl chloride copolymer (C) and the monoepoxide compound (D) are contained together in the first agent.

The first and second agents can be prepared by mixing the respective ingredients with a mixer such as a ball mill, a Pebble mill, a roll mill, a sand grind mill, or a high-speed dispenser.

(11) Film Thickness Judgment Function of Coloring System Coating

The coloring type coating material according to the present invention is a coating material which satisfies at least the following conditions (a) and (b), and preferably further satisfies the following condition (j). On the other hand, the &quot; dry film thickness T &quot; under the following conditions is a thickness selected from the range of, for example, about 10 to 500 mu m and may be selected from a range of 300 mu m or more.

(a) a coating film formed of a coloring type coating material having a predetermined dry film thickness T conceals the surface of the object,

(b) a color difference DELTA E1 between a coating film formed of a coloring type coating material having a predetermined dry film thickness T and a coating film formed of a coloring type coating material having a dry film thickness of 0.7T is 2.0 or more,

(j) A color difference DELTA E2 between a coating film formed of a coloring type coating material having a predetermined dry film thickness T and a coating film formed of a coloring type coating material having a dry film thickness of 1.3T is less than 1.

The color differences DELTA E1 and DELTA E2 and DELTA E3 described later can be measured by a generally accepted method using a color difference meter (colorimeter) such as a tripolar color SM color meter (type SM-T45, manufactured by Suga Test Instruments Co., Ltd.) . The color differences? E1,? E2 and? E3 are both absolute values.

The condition (a) defines the hiding property of the surface of the coating of the coating film formed of the coloring type coating material having the dry film thickness T (the coating film is a dry film but the rough hiding properties of the wet film and the dry film are almost the same) . When the colored coating material is coated on the surface of the coated object, the degree of "non-reflecting" on the coated object surface becomes smaller as the coated film thickness increases. It is judged that the coating film formed of the coloring type coating material conceals the surface of the coating material when the color of the surface of the coating material disappears and the color of the coating surface becomes the same as the color of the coating film made of the coloring type coating material. The coloring type paint according to the present invention can achieve such a hiding of the surface of the object when the dry film thickness T or more is formed.

The hiding property of a dry film formed of a coloring type coating material may be evaluated by a concealment ratio in accordance with JIS K 5600-4-1: 1999. In order to satisfy the condition (a), the coating film formed of the coloring type paint having the dry film thickness T preferably has a concealment ratio of 0.90 to 0.98, more preferably 0.92 to 0.98 (for example, 0.92 to 0.96) Do.

The condition (b) defines the color difference DELTA E1 when the dry film thickness is T and the film thickness is 0.7T when the film thickness is set as the target in the dry film formed of the coloring type paint. The coating film having a dry film thickness of 0.7 T is a coating film just before coating is completed. When the color difference? E1 is at least 2.0, it means that the film thickness of the coating film is greatly dependent on the film thickness immediately before the completion of coating (immediately before the dry film thickness T (0.7T) to the dry film thickness T). As a result, it is possible to sufficiently increase the color difference between the coating film that is fairly close to the dry film thickness T and the coating film that has reached the dry film thickness T, so that it is easy to determine whether the wet coating film has reached the target film thickness, It is possible to extremely accurately form a dry coating film having a dry coating film thickness T, and it is also possible to solve the problem of insufficient film thickness.

The color difference? E1 is preferably 2.1 or more, more preferably 2.5 or more, and further preferably 3.0 or more. However, if the color difference DELTA E1 is too large, the color difference DELTA E1 is preferably not more than 10, more preferably not more than 5, because color heterogeneity tends to occur with a slight difference in film thickness. As described above, in the case of forming a coating film which is a thick film having a thickness of 300 탆 or more, it is preferable to use a scaly pigment (G) in order to realize a color difference ΔE1 of "2.0 or more".

It is necessary to sufficiently increase the color difference of the coating film that has reached the dry film thickness T and the coating film that has reached the dry film thickness T so as to make it easier to determine whether the wet coating film has reached the target film thickness, , The color difference ΔE1 'of a coating film formed of a coloring type coating material having a predetermined dry film thickness T and a coloring type coating material having a dry film thickness of 0.8T is preferably 1.0 or more, more preferably 1.1 or more, and more preferably 1.2 Or more (for example, 1.5 or more). For the same reason, the color difference DELTA E1 &quot; of a coating film formed of a coloring type paint having a predetermined dry film thickness T and a coloring type paint having a dry film thickness of 0.9T is preferably 0.5 or more, more preferably 0.6 or more And more preferably 0.7 or more.

The condition (j) defines the color difference DELTA E2 when the dry film thickness is T and the film thickness is 1.3T when the film thickness is set as the target in the dry film formed of the coloring type paint. The coating film having a dry film thickness of 1.3 T is a coating film after (or immediately after) completion of coating. When the color difference? E2 is 1 or more, the color difference between the coating film having a dry film thickness T and the coating film having a dry film thickness T exceeding T becomes large, and color irregularity is likely to occur. The color difference? E2 is preferably 0.5 or less, more preferably 0.4 or less (for example, 0.2 or less).

The visual observation shows that the color difference between the coating film formed from the coloring type coating material having the predetermined dry film thickness T and the color difference with the object becomes larger as the coating film thickness during coating becomes closer to the target film thickness, It becomes easier to determine whether the wet coating film has reached the target film thickness or whether the film thickness is still short. Therefore, the color difference? E3 is preferably 20 or more (condition (k)), more preferably 25 or more, and more preferably 30 or more. If the color difference DELTA E3 is too small, it becomes easy to confirm whether or not the surface of the substrate is concealed by the coating film.

The coloring-type coating material satisfying the above-mentioned conditions can be obtained by selecting the kind (color) of the coloring pigment and adjusting the content thereof, or by further containing a predetermined amount of the scaly pigment (G). The set value of the dry film thickness T of the colored coating material can be adjusted in accordance with the content of the colored pigment. That is, basically, by setting the content of the colored pigment to be smaller, the set value of the dry film thickness T of the colored coating material can be made larger. In other words, since the set value of the dry film thickness T is determined from the characteristics of the coating film such as the corrosion resistance required for the coating film and the type of the coating material, the content of the coloring pigment is adjusted so as to meet the set value of the dry film thickness T.

<Coating Method>

As described above, the method for forming a coating film according to the present invention is a method for forming a dried coating film on the surface of a substrate,

A step of setting the dry film thickness T (dry film thickness setting step)

A two-part type coloring-type paint comprising a first agent and a second agent, wherein a coloring-type paint satisfying the above-mentioned conditions (a) to (i) (more preferably, conditions (j) and (k) (Coloring system paint preparing step),

A step (coating step) of applying a coloring-type coating material to the surface until the surface of the object is concealed by a coating film made of a coloring-type coating material, and

A step of drying the coating film (wet coating film) obtained by the coating step to obtain a dried coating film (drying step)

.

The method for forming a coating film according to the present invention defines a method for forming a coating film on a glass substrate as is understood from the respective steps included therein. However, as long as the method for forming a coating film on the glass substrate is included, Are included in the present invention. For example, the present invention includes a method for obtaining a dried coating film having a desired film thickness by a plurality of sieves, including a method for forming a coating film on a first coat according to the present invention. Hereinafter, each step will be described in detail.

(1) Dry Film Thickness Setting Process

This step is a step of setting the dry film thickness T, which is the film thickness of the target dry film formed by one ply. In the present invention, the dry film thickness T is not particularly limited, but may be selected from the range of, for example, about 10 to 500 mu m, and may be selected from the range of 300 mu m or more. In order to prepare or prepare a predetermined coloring-type coating material in the coloring-type coating material preparing step, the dry film thickness T needs to be set in advance, so this step is performed before the coloring-type coating material preparing step.

The dry film thickness T may be the thickness of the dry film to be ultimately formed on the surface of the article or may be the thickness of the dry film formed in the middle step formed in forming the dry film. An example of the former case is a case where a final dry film is formed on the surface of the substrate by a single ply, and the latter example is a case where a final dry film is formed by plural ply. As a specific example of the latter, for example, a dried coating film having a film thickness of 300 mu m is formed in one coat, and then a dry coating film having a film thickness of 300 mu m is further formed thereon to form a dried coating film having a final thickness of 600 mu m &Lt; / RTI &gt; The film thickness of the dry film to be finally formed on the surface of the substrate is usually a film thickness (for example, a film thickness at which sufficient corrosion resistance can be obtained) in which desired characteristics to be imparted to the surface of the substrate are sufficiently obtained.

(2) Coloring system paint preparation process

This process is a two-liquid type coloring type coating material comprising a first and a second agent and is a coloring type coating material comprising a coloring type coating material according to the present invention satisfying the conditions (a) to (i) (preferably, conditions (j) It is a step of preparing or preparing a conventional paint. Details of the coloring type coating material including the preparation method are as described above, and therefore, the description is given here.

(3) Coating process

This step is a step of applying a coloring type coating material to the surface of the substrate until the surface of the substrate is covered with a coating film made of a coloring type coating material. In this process, a coloring type coating material is applied to the surface of the substrate while observing the change in color difference between the coating film (wet coating film) and the surface of the substrate during coating. "Observing the change in color difference between the coating film (wet coating film) and the surface of the coating film in the course of coating" means that the coating film on the surface of the coating film (wet coating film) And observes to what extent the surface of the object is concealed. More specifically, the coloring paint is applied to the surface of the object, but since the thickness of the paint film is small at the beginning of coating, the color of the wet paint film largely reflects the color of the object surface (i.e., &quot; Big). Thus, the change of the color of the coating film (wet coating film) on the surface of the coated object during coating is visually observed. As the film thickness increases, this &quot; non-penetration &quot; becomes smaller and reaches the point of time when the color of the surface of the object is not reflected in the color of the wet film, i.e., the time when the wet film hides the object surface. Since the base coat concealability of the wet coating film is substantially the same as that of the dry coating film, the coating thickness of the wet coating film at this point (the coating film thickness of the wet coating film when the coating surface is concealed) corresponds to the target dry film thickness T .

In the above coating method, whether or not the wet coating film covers the surface of the object can be confirmed as follows. For example, a color swatch having a dry film having a target dry film thickness T is prepared in advance, and when it is determined that the color of the swatch matches the color of the wet film, it is determined that the wet coating hides the surface of the object . In the case where there is a region in which a coating film is already formed with a target film thickness near the surface of the coating on which the coating is performed, when the color of the coating film in this region coincides with the color of the wet coating film, It can be judged that it has concealed. Since the color of the dry film having the target dry film thickness T and the color of the wet film corresponding thereto and the color of the coloring system itself are typically the same, when the color of the wet film coincides with the color of the coloring system itself It may be judged that the wet film covers the surface of the object.

The coating method of the coloring type coating material is not particularly limited, and for example, conventionally known methods such as dipping method, spraying method, brushing, roller, electrostatic painting and the like can be used. Specifically, the coating composition obtained by mixing the first agent and the second agent immediately before use is applied using the above-mentioned method. Coating of the coating composition obtained by mixing the first agent and the second agent onto the substrate is performed within the pot life (pot life) after mixing the first agent and the second agent. The coloring type coating material according to the present invention typically exhibits a pot life of about 30 minutes to 8 hours. After coating, drying treatment can be performed to form the anticorrosive coating film. The drying temperature is usually room temperature (about 20 to 35 占 폚), but it may be performed at a lower temperature.

The object to be painted (the object to which the coloring paint is applied) is not particularly limited as long as it requires a method. For example, the object (such as the inner surface of the ballast tank of the ship, the bottom of the ship, Water intake facilities such as power plants; Piping such as a water pipe for cooling; Bridge; buoy; Industrial water facilities; Submarine bases; Tank; And an offshore structure such as a plant (oil plant). Examples of the material of the surface of the substrate on which the coloring type paint is coated include iron-based metals such as steel (for example, steels such as untreated steels, blasted steels, acid treated steels, zinc plated steels, and stainless steels); Non-ferrous metals such as aluminum (alloy) material and copper (alloy) material; concrete; plastic; A coating film made of a paint such as an old coating film, or the like. An old coating means a coating film or a part thereof previously formed and provided for use.

The surface of the substrate on which the coloring-type coating material is coated may be pretreated if necessary, or may have a subbing layer (coating film). Examples of the coating film include a shop primer layer formed from a conventionally known waterproof coating composition; An organic or inorganic zinc primer layer; Other types of coatings may be mentioned. To describe another concrete example used above, a dry coating film having a film thickness of 300 mu m is formed on the other coating film, for example, in one coat, and then a dry coating film having a film thickness of 300 mu m is further formed thereon. It may be a first-stage dry coating film in the case of forming an anticorrosive coating film having a thickness of 600 mu m. When the undercoat layer is formed on the surface of the substrate, the term "surface of the substrate" in the above conditions (a) and (k) means the surface of the undercoat layer.

The other anticorrosion coating may be formed according to the method of the present invention. In order to satisfy the above condition (k), when the anticorrosive coating film is further formed on the colored anticorrosive coating film according to the method of the present invention, a coloring type paint for forming the anticorrosive coating film and a anticorrosive coating film formed thereon And the color difference of the two paints is preferably 20 or more.

(4) Drying process

This step is a step of drying a coating film (wet coating film) obtained by a coating process to obtain a dried coating film. Conventionally known methods can be used for drying (and curing) the wet coating film. The drying temperature is usually room temperature (about 20 to 35 占 폚), but it may be carried out at a lower temperature or a higher temperature.

(5) Other processes

A top coat may be applied on the dried film to form a top coat. Alternatively, a topcoat may be formed by forming a binder coat on the obtained dried coating film and coating the topcoat on the binder coat. Examples of the top paint include oil-based paints, long oil-based phthalic acid resin paints, epoxy resin paints, modified epoxy resin paints, tar epoxy resin paints, chlorinated rubber resin paints, vinyl chloride resin paints, alkyd resin paints, silicone alkyd resin paints, Based paint, a urethane resin-based paint, a fluororesin-based paint, a polyester resin-based paint, an epoxyacrylic resin-based paint, a polysiloxane resin-based paint, a phenol resin-based paint and the like. The top coat may be an antifouling paint applied to marine structures and ships. As the antifouling paint, an antifouling paint containing an acrylic resin having a hydrolyzable group in its side chain as a binder resin may be mentioned. The hydrolyzable group may be, for example, a metal ester group containing a metal atom such as divalent Cu or Zn, a trialkylsilyl ester group, or the like. The dried film thickness of the top coat is usually about 10 to 300 mu m.

The top coating may be a coloring coating according to the present invention. An embodiment in which the coloring-type paint of the present invention is an upper paint is a method of forming a coating film made of the coloring-type paint according to the present invention on a paint film formed of the coloring-type paint according to the present invention, . On the other hand, the coloring-type coating material according to the present invention can be used not only as an undercoat but also as an overcoating film. The dry film thickness of the top coat formed from the colored coating material according to the present invention is usually about 10 to 500 mu m.

The anticorrosive coating film formed from the coloring-type paint according to the present invention is excellent in anticorrosion properties and crack resistance, and also in the topcoat formed of the coloring-type paint or in the topcoat formed of the other topcoat Exhibits good adhesion, and can exhibit good interval adhesion. Thus, the coating workability can be improved.

According to the method for forming a coating film using the coloring type paint according to the present invention, it is possible to easily determine whether or not the coating film in the coating has reached a predetermined film thickness, so that a uniform coating film having a predetermined dry film thickness can be formed accurately have. Thus, it is possible to effectively prevent the film thickness shortage which has conventionally occurred conventionally. In addition, since excessive film thickness can be prevented, the coating material can be saved.

Further, according to the coating film forming method using the coloring type paint according to the present invention, it is possible to avoid troublesome work of confirming whether or not the film thickness has been reached by repeatedly measuring the film thickness, It is possible to reduce the burden on the pottery worker significantly.

The method of forming a coating film using the coloring type paint according to the present invention can be applied to the coating of various structures (particularly, ships and marine structures). According to the method of the present invention, it is possible to accurately and easily form a uniform coating film having a predetermined dry film thickness on a structure or a portion thereof which is difficult to be coated, such as when a paint is applied to the outer surface of a large structure such as a ship have.

Example

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to these examples. On the other hand, unless otherwise specified, except for "PVC" in the table, parts and% in the examples are based on mass.

Examples 1 to 12, Comparative Example 1: Preparation of coloring-type paints &gt;

According to the formulation recipe shown in Table 1 or Table 2, each of the ingredients was mixed to prepare a first agent (subject) and a second agent (hardener), respectively, to obtain a two-part type coloring type paint. Details of the respective ingredients shown in Tables 1 and 2 are as follows. On the other hand, the unit of the blending amount shown in the table is a mass part converted to solid content.

In Table 1 and Table 2, the% by volume (% by volume of the film forming component) of the blending amount of the colored pigment and the extender pigment is shown. The coating film forming component means all the components other than the solvent contained in the coloring type coating material. Further, the set value T of the dry film thickness of each of the coloring-type paints and the concealment rate of the dry film of each coloring-type paint having the dry film thickness T (in Table 1 and Table 2, Quot; concealment rate &quot;) is also shown.

[1] Bisphenol A (BFA) type epoxy resin (A): Bisphenol A type epoxy resin (solvent diluted type) manufactured by DIC Corporation, trade name "EPICLON 860-90X", epoxy equivalent weight: 230-270 g / (Converted to standard polystyrene by GPC measurement): 470, non-volatile matter (solid content): 90% by mass,

[2] Copolymer of vinyl chloride type (C): vinyl chloride-vinyl isobutyl ether copolymer of BASF, molar ratio of vinyl chloride / vinyl isobutyl ether: "RAROPLEX MP25" (In terms of standard polystyrene by GPC measurement): 28000 to 30000, non-volatile matter (solid content): 100% by mass,

(3) (Meth) acrylate compound (E): bisphenol A epoxy epoxy resin (trade name: Lipoxy VR-90-M), bisphenol A epoxy resin Molecular weight (converted to standard polystyrene by GPC measurement): 2000, non-volatile matter (solid content): 70% by mass,

[4] Silane coupling agent (F): γ-glycidyloxypropyltrimethoxysilane manufactured by EVONIK DEGUSSA, trade name "DYNASYLAN GLYMO", non-volatile matter (solid content): 100%

(5) Coloring pigment 1: Titanium oxide (white pigment), trade name &quot; CR50 &quot;, manufactured by Ishihara Sangyo Kaisha, solid content: 100 mass%

[6] Coloring Pigment 2: yellow iron oxide manufactured by Daito Kogyo Co., Ltd., trade name: TAROX Synthetic Iron Oxide LL-XLO, non-volatile matter (solid content): 100%

[7] Extendable pigment 1: Glass flake made by Nippon Itagaras Co., Ltd., product name: RCF-140, average particle diameter: 149 m, average thickness: 28 m, aspect ratio: , Specific gravity: 2.5,

Talc, trade name &quot; Talc DS34-N &quot;, average particle diameter: 17 μm, average thickness: 4 μm, aspect ratio: 4.3, refractive index: 1.6, nonvolatile matter: 100% Specific gravity: 2.7,

[9] Extendable coloring material 3: Talc manufactured by Fuji TARK Co., Ltd., trade name: TALK SP42, average particle diameter: 14 μm, average thickness: 4 μm, aspect ratio: 3.5, refractive index: 1.6, nonvolatile matter: ,

[10] Extendable pigment 4: Talc manufactured by Fuji TARK Co., Ltd., trade name &quot; Talc TPA-25 &quot;, average particle diameter: 8 탆, average thickness: 3 탆, aspect ratio: : 2.7,

[0074] [71] Extractive pigment 5: Micah, trade name "vitronm 200M", average particle size 78 μm, average thickness 8 μm, aspect ratio 9.8, refractive index 1.6, nonvolatile matter 100 mass%, specific gravity 2.7 ,

MT-MICA D325W ", average particle diameter: 39 μm, average thickness: 7 μm, aspect ratio: 5.6, refractive index: 1.6, nonvolatile matter: 100% by mass, specific gravity: 2.8,

[13] Anti-corrosive pigment: semi-gypsum (β gypsum) made by Noritake Co., Ltd.: TA-85N, non-volatile matter (solid content): 100%

[14] Solvent 1: xylene,

[15] Solvent 2: isobutanol,

[16] Solvent 3: methyl isobutyl ketone,

[17] Anti-sagging agent: Sag preventing agent made by Goosumoto Chemical Co., Ltd., Disperson 6700, non-volatile matter (solid content): 100%

[18] Amine-based curing agent (B): A polyamide amine (trade name, an amine component: mixture of triethylenetetramine and tetraethylenepentamine) of dimethic acid-modified aliphatic polyamide amine , Amine equivalent: 225 mg KOH / g, non-volatile matter (solid content): 69% by mass,

(19) monoepoxide compound (D): an alkyl glycidyl ether compound (alkyl group having 12 to 14 carbon atoms), Epodil 748, epoxy equivalent: 275 to 300, non-volatile matter (solid content) : 100% by mass.

The hiding percentage of the dry film of each coloring type paint having an average particle diameter, an average thickness, an aspect ratio, a refractive index, and a dry film thickness T of the extender pigment such as a scaly pigment, Was measured according to the following method.

[A] the extender pigment has an average particle size, an average thickness and an aspect ratio

Particle images of the extender pigment were photographed using a powder image analyzer (&quot; PITA-3 &quot; manufactured by Seishin Kogyo Co., Ltd.) Particles were selected and long diameter and short diameter were measured for each particle. The average value of the long diameters of the 50 particles was taken as the average particle diameter of the extender pigment, and the average value of the short diameters of the 50 particles was taken as the average thickness of the extender pigment. Further, the average particle size was divided by the average thickness, and the aspect ratio was calculated. The measurement conditions of the powder image analyzer are as follows.

The dispersion medium of the sample liquid and its flow rate: water, 0.42 mu L /

· Types of first and second carrier liquids and their flow rates: all water, 500 μL /

· Observation magnification of photographed image: 10 times.

[B] Refractive index of extender pigments

The refractive index of the extender pigment was measured according to JIS K 0062: 1992.

[C] Concealment rate in dry paint film thickness T of the coloring type paint

According to JIS K 5600-4-1: 1999, the concealed rate of the dry coating film of each coloring type paint having a film thickness of the set value T of the dry film thickness was measured.

The first agent (the subject) and the second agent (the curing agent) of the resultant two-part type coloring-type paint were mixed in the amount ratio shown in the column of &quot; total &quot; in Table 1 or Table 2 (for example, : The second component = 80.67 parts by mass: 13.10 parts by mass), and sufficiently stirred and homogenized to obtain a mixed paint (anticorrosive coating composition). The obtained mixed paint (anticorrosive paint composition) was subjected to the following evaluation tests. The test results are shown in Table 3.

[1] Evaluation test of electrical conductivity (cathode method test)

First, an inorganic zinc shop primer (trade name &quot; Ceramo &quot;) made by Nippon Paint Marine Co., Ltd. was coated on a grid-blasted steel plate (7 cm x 15 cm x 3.2 mm) so as to have a dry film thickness of about 15 m, And dried to prepare a primer-treated steel sheet. Subsequently, the anticorrosive coating composition immediately after preparation was applied to the primer-treated steel sheet using an air spray so as to have a dry film thickness of about 250 mu m, and was dried for 7 days in an atmosphere of 23 DEG C x 65% RH, Test plates were obtained. The test board was used to conduct tests according to ASTM G8-90 and to evaluate them. That is, first, a plate of a 6.3 mm phi size base exposed portion was formed by using a drill blade of 6.3 mm in diameter at the center of the immersed portion of the test surface (coating surface) of the test plate. Subsequently, this plate was subjected to a potential of 1.5 V while immersed in an aqueous solution at 40 캜 containing 1 mass% of NaCl, Na ₂ SO ₄ and Na ₂ CO ₃ , respectively, and the length of the peeling portion of the coating film [Creep width, mm] was measured. The values (crepe width) shown in Table 3 are average values of the results obtained by immersing in the three kinds of aqueous solutions.

[2] Evaluation test of salt water resistance at 40 캜 (corrosivity evaluation test)

First, an inorganic zinc shop primer (trade name &quot; Ceramo &quot;) made by Nippon Paint Marine Co., Ltd. was coated on a grid-blasted steel plate (7 cm x 15 cm x 3.2 mm) so as to have a dry film thickness of about 15 m, And dried to prepare a primer-treated steel sheet. Subsequently, the anticorrosive coating composition immediately after preparation was applied to the primer-treated steel sheet using an air spray so as to have a dry film thickness of about 250 탆 and dried for 7 days in an atmosphere of 20 캜 65% RH, Test plates were obtained. Next, each test board was immersed in 3% saline at 40 占 폚 for 3 months. The adhesion force (MPa) of the coated film after priming for 3 months to the primer treated steel sheet was measured with an Adhime tester manufactured by Elcometer.

[3] Top coat adhesion evaluation test (interval adhesion test)

[3-1] When the top coat is an antifouling paint composition

First, an inorganic zinc shop primer (trade name &quot; Nippe Seramo &quot;) manufactured by Nippon Paint Marine Co., Ltd. was applied to a grid-blasted steel plate (7 cm x 15 cm x 3.2 mm) Followed by drying for a day, to prepare a primer-treated steel sheet. Subsequently, the anticorrosive coating composition immediately after preparation was applied to the primer-treated steel sheet using an air spray so as to have a dry film thickness of about 250 占 퐉 and dried for 7 days under an atmosphere of 20 占 폚 and 65% RH The plate was obtained. Subsequently, the test board was exposed to the outside to provide an interval of a certain period of time shown in Table 3. Then, on the anticorrosive coating film of the test board, (a) a hydrolyzable acrylic resin antifouling paint "Ecoroflex SPC 200" Paint Marine Co., Ltd.) was applied by spraying so that the dry film thickness was about 150 占 퐉. In Table 3, the term &quot; initial &quot; in the column of &quot; interval &quot; means that the top coating was applied immediately after the trial test board was exposed to the outside.

Next, the topcoat-coated board was dried in the room for 24 hours. Immediately after the plate was immersed in seawater for 6 months, a cross-cut method in accordance with JIS K 5600-5-6 was performed at a gap spacing of 5 mm and a mass number of 9, and the adhesion of the upper surface was evaluated . The evaluation criteria are as follows.

A: The peeled area at the cut portion is 5% or less

B: The peeled area in the cut portion is more than 5% but not more than 15%

C: The peeled area at the cut portion is more than 15% and not more than 35%

D: The peeled area in the portion of the cut is more than 35% but not more than 65%

The top coat adhesion evaluation test as described above was carried out using the following (b) to (f) different from the above (a) as the top coat. The results were the same as those in the case of using the antifouling paint of (a).

(b) Hydrolysable acrylic resin Antifouling paint "Ecoroflex SPC 150 HyB" (manufactured by Nippon Paint Marine Co., Ltd.)

(c) Hydrolysis-resistant acrylic resin An antifouling paint "Ecoroflex SPC 250 HyB" (manufactured by Nippon Paint Marine Co., Ltd.)

(d) Hydrolysis-resistant acrylic resin An antifouling paint "Bioflex 1000" (manufactured by Nippon Paint Marine Co., Ltd.)

(e) Hydrolysis-resistant acrylic resin An antifouling paint "LF-Sea 150 HyB" (manufactured by Nippon Paint Marine Co., Ltd.)

(f) Hydrolysable acrylic resin Antifouling paint "LF-Sea 250 HyB" (manufactured by Nippon Paint Marine Co., Ltd.).

[3-2] When the top coat is other than the antifouling paint composition

Except that the top coat (g) was the same as that used in the examples and comparative examples used as the undercoat (using the same paint as the undercoat anticorrosive coating composition), the top coat adhesion An evaluation test was conducted. At this time, the top paint was applied by spraying so that the dry film thickness was about 125 占 퐉.

A top coat adhesion evaluation test similar to the above was conducted except that the following (h) to (m) different from the above (g) were used as the top coat and the dry film thickness of the top coat was as described below. The result was the same as in the case of using the above-mentioned top coat (g).

(h) Epoxy resin paint "Nippe Epoxy Finish M" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 100 μm,

(i) Alkyd resin paint "CR Marine Finish" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 35 μm,

(j) Acrylic resin paint &quot; Nippon A-Marine Finish &quot; (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness:

(k) Euretene resin paint "Polyuremicite M" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 30 μm × 2 (30 μm thick dry film was formed thereon, , &Lt; / RTI &gt;

(l) Epoxy resin paint "NOA A / C II" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 75 μm,

(m) Epoxy resin paint "Nippon E-Marine A / C II" (manufactured by Nippon Paint Marine Co., Ltd.) Dry film thickness: 75 μm.

&Lt; Examples 13 to 26, Comparative Example 2: Formation of a dry coating film using a colored coating material >

A shop primer ("Nippe Ceramograe" or "Nippe Ceramomo Brown" manufactured by Nippon Paint Marine Co., Ltd.) was applied to a 900 mm × 900 mm satin-finished steel sheet to a dry film thickness of 15 μm And dried at room temperature for 24 hours or more to prepare a test plate. On the other hand, in Tables 4 to 6, &quot; Nippe Seramograe &quot; and &quot; Nippe Seramomo Brown &quot; are omitted from "Gray" and "Brown", respectively.

The first agent (the subject) and the second agent (the curing agent) of the obtained two-part type coloring-type paint were measured for the amount ratio shown in the column of "total" in Table 1 or Table 2 (for example, (Second component = 80.67 parts by mass: 13.10 parts by mass), and sufficiently stirred and homogenized to obtain a mixed paint (anticorrosive coating composition).

Next, the mixed paint (anticorrosive coating composition) shown in Tables 4 to 6 in which the two solutions of the first and second agents were prepared was coated on the surface of the shop primer of the obtained test plate by the airless spray method And dried at room temperature for 24 hours to form a conventional coating film. At this time, in each of the Examples and Comparative Examples, a plurality of dry type coating films having the dry film thicknesses shown in Tables 4 to 6 were formed. The dry film thickness of each coating film was measured using an electronic film thickness meter "COATING THICKNESS TESTER LE-900" manufactured by KET.

Measurement by the SM-7CH of the trichromatic colorimeter SM Color Computer manufactured by Suga Tester Co., Ltd. in accordance with JIS K 5600-4-5: 1999 and calculation based on JIS K 5600-4-6: 1999 , The color difference DELTA E between the anticorrosive coating film having the respective dried film thickness obtained and the anticorrosion coating film having the set value T of the dry film thickness targeted by each coloring-type paint was obtained. The results are shown in Tables 4 to 6. In addition, the base concealability (concealability of the shop primer coating film by the anticorrosive coating film) in the wet film state of the anticorrosive coating film showing each dry film thickness was visually observed and evaluated based on the following criteria. The results are also shown in Tables 4 to 6. For each of the examples and comparative examples, graphs in which the dry film thicknesses (μm) shown in Tables 4 to 6 are plotted along the abscissa and ΔE shown in Tables 4 to 6 are plotted along the ordinate are shown in FIGS.

A: I'm covering up.

B: There is a slight reflection.

C: The whole is shining.

On the other hand, ΔE at a dry film thickness of 0 μm in Tables 4 to 6 means the color difference between the anticorrosive coating film having a dried film thickness of T and the surface of the coating material (coating surface of the shop primer coating film), and agrees with the above-mentioned color difference ΔE3.

&Lt; Examples 27 to 48 and Comparative Examples 3 to 9 >

Each of the compounding ingredients was mixed in accordance with the formulation recipe shown in Tables 7 to 9 to obtain a second product containing a bisphenol A type epoxy resin (A) and an amine type curing agent (B) Curing agent) were respectively prepared to obtain a two-part type anticorrosive coating composition. Details of the respective ingredients shown in Tables 7 to 9 are as follows. On the other hand, the unit of the blending amount shown in the table is a mass part converted to solid content.

(1) Bisphenol A type epoxy resin (A): bisphenol A type epoxy resin (solvent diluted type) manufactured by DIC Corporation, trade name "EPICLON 860-90X", epoxy equivalent weight: 230-270 g / : 470, non-volatile matter (solids content): 90% by mass,

[2] Amine-based curing agent (B-1): A polyamine amine (dimeric acid-modified aliphatic polyamide amine (amine component: mixture of triethylenetetramine and tetraethylenepentamine) manufactured by Air Products) 2050 &quot;, amine equivalent: 225 mg KOH / g, non-volatile matter (solid content): 69%

[3] Amine-based curing agent (B-2): Polyamide amine (dimeric acid-denatured aliphatic polyamideamine (amine component: pentaethylene hexamine) manufactured by Air Products Co., Ltd., trade name: Sunmade 308D-65T, : 180 to 200 mg KOH / g, non-volatile matter (solid content): 65%

[4] Vinyl chloride copolymer (C): a vinyl chloride-vinyl isobutyl ether copolymer manufactured by BASF, a trade name of "RAROPLEX MP25", a vinyl chloride / vinyl isobutyl ether molar ratio of about 75/25, (In terms of standard polystyrene by GPC measurement): 28000 to 30000, non-volatile matter (solid content): 100% by mass,

[5] Monoepoxide compound (D-1): An alkyl glycidyl ether compound (alkyl group having 12 to 14 carbon atoms), Epodil 748, an epoxy equivalent of 275 to 300, Solid content): 100% by mass,

(6) Monoepoxide compound (D-2): 3-n-pentadecadienylphenyl glycidyl ether manufactured by Cardolite, trade name "Cardolite Lite 2513HP", epoxy equivalent: 400, 100% by mass,

Epodil 749 ", epoxy equivalent: 130 to 145, non-volatile matter (solid content): 100% by mass,

(E): bisphenol A type epoxy (meth) acrylate (bisphenol A type vinyl ester resin) manufactured by Showa Denko Co., Ltd., "Lipoxy VR-90-M" Molecular weight (converted to standard polystyrene by GPC measurement): 2000, non-volatile matter (solid content): 70% by mass,

[9] Silane coupling agent (F): γ-glycidyloxypropyltrimethoxysilane manufactured by EVONIK DEGUSSA, trade name "DYNASYLAN GLYMO", non-volatile matter (solid content): 100%

(10) Coloring pigment 1: Titanium oxide (white pigment), trade name &quot; CR50 &quot;, manufactured by Ishihara Sangyo K.K., nonvolatile matter (solid content): 100%

[11] Coloring Pigment 2: yellow iron oxide manufactured by Daitan Kogyo Co., Ltd., trade name "TAROX synthetic iron oxide LL-XLO", non-volatile matter (solid content): 100%

[12] Extender Pigment 1: Talc manufactured by Fuji Talc Kogyo KK, trade name "TALK 34-N", non-volatile matter (solid content): 100%

[13] Extincting pigment 2: barium sulfate of Fuji Talc Kogyo Co., Ltd., trade name "Barite Powder FBA", non-volatile matter (solid content): 100%

[14] Anti-corrosive pigment: semi-gypsum (gypsum) manufactured by Noritake Co., Ltd.: trade name TA-85N, non-volatile matter (solid content): 100%

[15] Anti-sagging agent: Anti-sagging agent manufactured by Gusumoto Chemical Co., Ltd., trade name "Disalon 6700", non-volatile matter (solid content): 100%

[16] Solvent 1: xylene,

[17] Solvent 2: isobutanol,

[18] Solvent 3: methyl isobutyl ketone.

The first agent (the subject) and the second agent (the curing agent) of the obtained two-part type anticorrosive coating composition were mixed in the amounts shown in the &quot; total &quot; column in Tables 7 to 9 (for example, in the case of Example 27, 2 = 79.2 parts by mass: 11.5 parts by mass), and sufficiently stirred and homogenized. The obtained mixed paint (anticorrosive paint composition) was subjected to the following evaluation tests. The test results are shown in Tables 10 to 12. However, in Comparative Examples 6 to 8, evaluation test could not be carried out because the second agent (curing agent) caused gelation.

[1] Evaluation test of electrical conductivity (cathode method test)

First, an inorganic zinc shop primer (trade name &quot; Ceramo &quot;) made by Nippon Paint Marine Co., Ltd. was coated on a grid-blasted steel plate (7 cm x 15 cm x 3.2 mm) so as to have a dry film thickness of about 15 m, And dried to prepare a primer-treated steel sheet. Subsequently, the anticorrosive coating composition immediately after preparation was applied to the primer-treated steel sheet using an air spray so as to have a dry film thickness of about 250 mu m, and was dried for 7 days in an atmosphere of 23 DEG C x 65% RH, Test plates were obtained. The test board was used to conduct tests according to ASTM G8-90 and to evaluate them. That is, first, a plate of a 6.3 mm phi size base exposed portion was formed by using a drill blade of 6.3 mm in diameter at the center of the immersed portion of the test surface (coating surface) of the test plate. Subsequently, this plate was subjected to a potential of 1.5 V while immersed in an aqueous solution at 40 캜 containing 1 wt% of NaCl, Na ₂ SO ₄ and Na ₂ CO ₃ , respectively, and the length of the peeling portion of the coating film from the substrate- [Creep width, mm] was measured. The values (crepe width) shown in Tables 10 to 12 are average values of the results obtained by immersing in the three kinds of aqueous solutions.

[2] Evaluation test of salt water resistance at 40 캜 (corrosivity evaluation test)

First, an inorganic zinc shop primer (trade name &quot; Ceramo &quot;) made by Nippon Paint Marine Co., Ltd. was coated on a grid-blasted steel plate (7 cm x 15 cm x 3.2 mm) so as to have a dry film thickness of about 15 m, And dried to prepare a primer-treated steel sheet. Subsequently, the anticorrosive coating composition immediately after preparation was applied to the primer-treated steel sheet using an air spray so as to have a dry film thickness of about 250 탆 and dried for 7 days in an atmosphere of 20 캜 65% RH, Test plates were obtained. Next, each test board was immersed in 3% saline at 40 占 폚 for 3 months. The adhesion force (MPa) of the coating film to the primer-treated steel sheet after immersing for 3 months was measured with an Adhime Tester manufactured by Elcometer.

[3] Top coat adhesion evaluation test (interval adhesion test)

[3-1] When the top coat is an antifouling paint composition

First, an inorganic zinc shop primer (trade name &quot; Nippe Seramo &quot;) manufactured by Nippon Paint Marine Co., Ltd. was applied to a grid-blasted steel plate (7 cm x 15 cm x 3.2 mm) Followed by drying for a day, to prepare a primer-treated steel sheet. Subsequently, the anticorrosive coating composition immediately after preparation was applied to the primer-treated steel sheet using an air spray so as to have a dry film thickness of about 250 占 퐉 and dried for 7 days under an atmosphere of 20 占 폚 and 65% RH The plate was obtained. Subsequently, the test board was exposed to the outside to provide an interval of a certain period of time shown in Tables 10 to 12. Then, on the anticorrosive coating film of the test board, (a) a hydrolyzable acrylic resin antifouling paint "Ecoroflex SPC 200 (Manufactured by Nippon Paint Marine Co., Ltd.) was applied by spraying to a dry film thickness of about 150 mu m. In Tables 10 to 12, the term &quot; initial &quot; in the column of &quot; interval &quot; means that the top coat is applied immediately after the trial test board is exposed to the outside.

Next, the topcoat-coated board was dried in the room for 24 hours. Immediately after this plate was immersed in seawater for 6 months, the cross-cut method according to JIS K 5600-5-6 was performed at a gap interval of 5 mm and a mass number of 9, and the adhesion of the upper surface was evaluated. The evaluation criteria are as follows.

A: The peeled area at the cut portion is 5% or less

B: The peeled area in the cut portion is more than 5% but not more than 15%

C: The peeled area at the cut portion is more than 15% and not more than 35%

D: The peeled area in the portion of the cut is more than 35% but not more than 65%

The top coat adhesion evaluation test as described above was carried out using the following (b) to (f) different from the above (a) as the top coat. The results were the same as those in the case of using the antifouling paint of (a).

(b) Hydrolysable acrylic resin Antifouling paint "Ecoroflex SPC 150 HyB" (manufactured by Nippon Paint Marine Co., Ltd.)

(c) Hydrolysis-resistant acrylic resin An antifouling paint "Ecoroflex SPC 250 HyB" (manufactured by Nippon Paint Marine Co., Ltd.)

(d) Hydrolysis-resistant acrylic resin An antifouling paint "Bioflex 1000" (manufactured by Nippon Paint Marine Co., Ltd.)

(e) Hydrolysis-resistant acrylic resin An antifouling paint "LF-Sea 150 HyB" (manufactured by Nippon Paint Marine Co., Ltd.)

(f) Hydrolysable acrylic resin Antifouling paint "LF-Sea 250 HyB" (manufactured by Nippon Paint Marine Co., Ltd.).

[3-2] When the top coat is other than the antifouling paint composition

Except that the top coat (g) was the same as that used in the examples and comparative examples used as the undercoat (using the same paint as the undercoat anticorrosive coating composition), the top coat adhesion An evaluation test was conducted. At this time, the top paint was applied by spraying so that the dry film thickness was about 125 占 퐉.

A top coat adhesion evaluation test similar to the above was conducted except that the following (h) to (m) different from the above (g) were used as the top coat and the dry film thickness of the top coat was as described below. The result was the same as in the case of using the above-mentioned top coat (g).

(h) Epoxy resin paint "Nippe Epoxy Finish M" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 100 μm,

(i) Alkyd resin paint "CR Marine Finish" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 35 μm,

(j) Acrylic resin paint &quot; Nippon A-Marine Finish &quot; (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness:

(k) Euretene resin paint "Polyuremicite M" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 30 μm × 2 (30 μm thick dry film was formed thereon, , &Lt; / RTI &gt;

(l) Epoxy resin paint "NOA A / C II" (manufactured by Nippon Paint Marine Co., Ltd.), dry film thickness: 75 μm,

(m) Epoxy resin paint "Nippon E-Marine A / C II" (manufactured by Nippon Paint Marine Co., Ltd.) Dry film thickness: 75 μm.

Claims (29)

A two-part type anticorrosive coating composition comprising a first agent and a second agent,
(A), an amine type curing agent (B), a vinyl chloride type copolymer (C), a monoepoxide compound (D) and a (meth) acrylate compound (E) ,
The content of the vinyl chloride-based copolymer (C) is 5 to 50 parts by mass based on 100 parts by mass of the bisphenol A type epoxy resin (A)
The content of the monoepoxide compound (D) is 2 to 50 parts by mass based on 100 parts by mass of the amine curing agent (B)
Wherein the content ratio of the monoepoxide compound (D) to the vinyl chloride copolymer (C) is 0.02 to 2.5 in mass ratio,
Wherein the monoepoxide compound (D) comprises an alkyl glycidyl ether compound,
Wherein the first agent contains the bisphenol A-type epoxy resin (A) and the vinyl chloride-based copolymer (C)
Wherein the second agent contains the amine curing agent (B) and the monoepoxide compound (D)
Wherein the (meth) acrylate compound (E) comprises a vinyl ester resin. delete delete The method according to claim 1,
Wherein the amine curing agent (B) is a polyamide amine. The method according to claim 1,
Wherein the vinyl chloride-based copolymer (C) is a vinyl chloride-vinyl alkyl ether copolymer. A coating film formed from the anticorrosive coating composition according to claim 1. A ship or an offshore structure having the coating film according to claim 6. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

Images