KR102340449B1 - Laminated antifouling coating film, substrate with laminated antifouling coating film and manufacturing method thereof, coating kit for forming laminated antifouling coating film, upper layer antifouling coating composition, and antifouling method - Google Patents

Abstract

A laminated antifouling coating film in which a lower antifouling coating film (X) and an upper antifouling coating film (Y) are laminated, wherein the lower antifouling coating film (X) contains a polymer (B1) and an organic antifouling agent (C1), the polymer (B1) is a polymer having a structural unit derived from a monomer having an unsaturated double bond, wherein the upper layer antifouling coating film (Y) contains a hydrolyzable polymer (A2).

Description

Laminated antifouling coating film, substrate with laminated antifouling coating film and manufacturing method thereof, coating kit for forming laminated antifouling coating film, upper layer antifouling coating composition, and antifouling method

The present invention relates to a laminated antifouling coating film, a substrate with a laminated antifouling coating film, and a manufacturing method thereof, a coating kit for forming a laminated antifouling coating film, an upper layer antifouling coating composition, and an antifouling method.

Articles used in the water, such as ships, underwater structures, and fishing nets, are required to prevent adhesion of aquatic organisms in order not to impair their functions. For the purpose of preventing the adhesion of living organisms, numerous organic compounds having biocidal and biorepellent properties, that is, synthesis and evaluation of organic antifouling agents, have been made up to now. As a representative example of such an organic antifouling agent, for example, 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile described in Patent Document 1 (also known as : tralopyryl) and 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one described in Patent Document 2 (another name: DCOIT).

On the other hand, in order to make use of the effect of such an antifouling agent, use of a self-burning type antifouling coating film using a hydrolyzable polymer is examined. A self-combustion type antifouling coating film is a coating film in which the surface of the coating film is continuously renewed by a process in which a hydrolyzable polymer undergoes a hydrolysis reaction on the surface of the coating film in contact with water, and the hydrophilic layer is burned by water flow. Since the above-described antifouling agent diffuses gradually from the surface of the coating film into water, the concentration on the surface of the coating film decreases. For example, Patent Document 3 discloses an antifouling paint composition containing two or more antifouling agents containing tralopyryl and an acrylic resin having a specific group in a side chain.

International Publication No. 95/5739 International Publication No. 95/32862 International Publication No. 2011/158358

However, in an antifouling paint composition containing such an antifouling agent and a hydrolyzable polymer, in particular, when the antifouling agent is an organic antifouling agent soluble in a solvent normally included in the antifouling paint composition, the antifouling paint composition is applied and dried to form an antifouling film. At the time, in the case of drying in the external environment, particularly at a high temperature, a problem that the antifouling agent is unevenly distributed in the vicinity of the surface of the coating film may arise. Although the exact cause of this is unknown, when the uneven distribution of the antifouling agent in the vicinity of the surface of the coating film occurs, in addition to problems such as abnormal appearance of the coating film, it is a particularly big problem. Consumption and subsequent use of the antifouling coating film WHEREIN: There existed a subject that the antifoulant|stain-resistant agent density|concentration became low rather than design, and the risk that long-term antifouling property became low arises.

In view of the above problems, the present invention provides a laminated antifouling coating film that does not have problems such as poor appearance accompanying the uneven distribution of the antifouling agent on the surface of the coating film, and exhibits high antifouling performance over a long period of time even under conditions of high soiling load. , to provide a base material with a laminated antifouling coating film using the laminated antifouling coating film, a manufacturing method thereof, and an antifouling method. Furthermore, an object of the present invention is to provide a coating kit for forming a laminated antifouling coating film used for manufacturing the antifouling coating film, and an upper layer antifouling coating composition.

As a result of the present inventors earnestly examining, it discovered that the said subject could be solvable by using the laminated antifouling|stain-resistant coating film which has the specific conditions shown below, and came to complete this invention.

The present invention relates to the following [1] to [18].

[1] A laminated antifouling coating film in which a lower antifouling coating film (X) and an upper antifouling coating film (Y) are laminated, wherein the lower antifouling coating film (X) contains a polymer (B1) and an organic antifouling agent (C1), and the polymer (B1) is a polymer having a structural unit derived from a monomer having an unsaturated double bond, and the upper layer antifouling coating film (Y) is a laminated antifouling coating film containing a hydrolyzable polymer (A2).

[2] The laminated antifouling coating film according to [1], wherein the lower layer antifouling coating film (X) further contains a hydrolyzable polymer (A1).

[3] The laminate antifouling coating film according to [1] or [2], wherein the total amount of the polymer (B1) and the hydrolyzable polymer (A1) in the lower layer antifouling coating film (X) is 1-90 mass %.

[4] The laminated antifouling agent according to any one of [1] to [3], wherein the hydrolyzable polymer (A1) and/or the hydrolyzable polymer (A2) has a structural unit derived from a silyl ester group-containing monomer (a11). paint film.

[5] The laminated antifouling coating film according to [4], wherein the silyl ester group-containing monomer (a11) is represented by the following formula (1-1).

(In formula (1-1), R ¹¹ represents a hydrogen atom or a methyl group, and R ¹² , R ¹³ and R ¹⁴ each independently represent a monovalent hydrocarbon group.)

[6] The laminated antifouling agent according to any one of [1] to [5], wherein the hydrolyzable polymer (A1) and/or the hydrolyzable polymer (A2) has a structural unit derived from a metal ester group-containing monomer (a12). paint film.

[7] The metal ester group-containing monomer (a12) contains at least one of a monomer (a121) represented by the following formula (1-2) and a monomer (a122) represented by the following formula (1-3), The laminated antifouling coating film according to [6].

(In formula (1-2), R ²¹ each independently represents a monovalent group containing a terminal ethylenically unsaturated group, and M represents a metal.)

(In formula (1-3), R ³¹ represents a monovalent group containing a terminal ethylenically unsaturated group, R ³² represents a monovalent organic group having 1 to 30 carbon atoms not containing a terminal ethylenically unsaturated group, and M represents a metal indicate.)

[8] The lower layer antifouling coating film (X) as the organic antifouling agent (C1), 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonite The laminated antifouling film according to any one of [1] to [7], comprising at least one selected from reel and 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one.

[9] A base material with a laminated antifouling coating film coated with the laminated antifouling coating film according to any one of [1] to [8].

[10] The base material with a laminated antifouling film according to [9], wherein the base material is an underwater structure, a ship, or a fishing gear.

[11] An antifouling method using the laminated antifouling coating film according to any one of [1] to [8].

[12] A step of applying a lower layer antifouling coating composition (x) on a substrate to form a lower antifouling coating film (X), and applying an upper layer antifouling coating composition (y) on the lower layer antifouling coating film (X), a step of forming an upper antifouling coating film (Y), wherein the lower layer antifouling coating composition (x) contains a polymer (B1) and an organic antifouling agent (C1), and the polymer (B1) is a monomer having an unsaturated double bond. A method for producing a substrate with a laminated antifouling coating film, wherein the polymer has a structural unit derived from it, wherein the upper layer antifouling coating composition (y) contains a hydrolyzable polymer (A2) and an organic solvent (D2).

[13] The layered antifouling coating film according to [12], wherein the organic solvent (D2) is soluble in the polymer (B1) and the organic antifouling agent (C1) contained in the lower layer antifouling coating composition (x). A method of making a substrate.

[14] The layered antifouling according to [12] or [13], wherein the organic solvent (D2) contains at least one selected from the group consisting of a hydrocarbon solvent, an alcohol solvent, a ketone solvent, and an ester solvent. A method for manufacturing a substrate with a coating film.

[15] The upper layer antifouling coating composition (y) contains an organic antifouling agent (C2), and the content (mass %) of the organic antifouling agent (C2) in the upper layer antifouling coating composition (y) is the lower layer antifouling coating composition (x) The method for producing a substrate with a laminated antifouling coating film according to any one of [12] to [14], which is lower than the content (mass %) of the organic antifouling agent (C1) in the composition.

[16] The method for producing a substrate with a laminated antifouling coating film according to any one of [12] to [15], wherein the upper layer antifouling coating composition (y) does not contain an organic antifouling agent (C2) substantially.

[17] Includes a lower layer antifouling coating composition (x) containing a polymer (B1) and an organic antifouling agent (C1), and an upper layer antifouling coating composition (y) containing a hydrolyzable polymer (A2) and an organic solvent (D2) wherein the polymer (B1) is a polymer having a structural unit derived from a monomer having an unsaturated double bond, the polymer (B1) and the organic antifouling coating composition (x) contained in the lower layer antifouling coating composition (x) A paint kit for forming a laminated antifouling film, wherein the agent (C1) is soluble in the organic solvent (D2).

[18] An upper antifouling paint composition coated on the surface of a lower antifouling coating film (X) containing a polymer (B1) and an organic antifouling agent (C1), wherein the polymer (B1) is derived from a monomer having an unsaturated double bond A polymer having a unit, wherein the upper layer antifouling coating composition contains a hydrolyzable polymer (A2) and an organic solvent (D2), the organic solvent (D2) is a polymer (B1) contained in the lower layer antifouling coating film (X), and The organic antifouling agent (C1) is soluble, the upper layer antifouling coating composition.

According to the present invention, a laminated antifouling coating film that exhibits high antifouling performance over a long period of time even under conditions of high soiling load without problems such as poor appearance accompanying uneven distribution of the antifouling agent on the surface of the coating film, and lamination using the laminated antifouling coating film A base material with an antifouling coating film, a manufacturing method thereof, and an antifouling method are provided. Furthermore, according to the present invention, there are provided a coating kit for forming a laminated antifouling coating film, and an upper layer antifouling coating composition used in the production of the antifouling coating film.

[Laminated antifouling coating film, substrate with laminated antifouling coating film, and manufacturing method thereof]

The laminated antifouling coating film of the present invention is a laminated antifouling coating film in which a lower antifouling coating film (X) and an upper antifouling coating film (Y) are laminated. The polymer (B1) is a polymer having a structural unit derived from a monomer having an unsaturated double bond, and the upper layer antifouling coating film (Y) contains a hydrolyzable polymer (A2).

Moreover, in the base material with a laminated antifouling coating film of this invention, the base material is coat|covered with the laminated antifouling coating film of this invention.

Moreover, the manufacturing method of the base material with a laminated antifouling coating film of this invention apply|coats the lower layer antifouling coating composition (x) on a base material, and forming the lower layer antifouling coating film (X), And on the lower layer antifouling coating film (X) , applying an upper layer antifouling coating composition (y) to form an upper layer antifouling coating film (Y), wherein the lower layer antifouling coating composition (x) contains a polymer (B1) and an organic antifouling agent (C1), The polymer (B1) is a polymer having a structural unit derived from a monomer having an unsaturated double bond, and the upper layer antifouling coating composition (y) contains a hydrolyzable polymer (A2) and an organic solvent (D2).

It is preferable that the base material with a laminated antifouling coating film of this invention is manufactured by the manufacturing method of the base material with a laminated antifouling coating film of this invention. In addition, it is preferable that the laminated antifouling coating film of the present invention is formed of the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) used in the method for producing a substrate with a laminated antifouling coating film.

According to the present invention, a laminated antifouling coating film that exhibits high antifouling performance over a long period of time even under conditions of high soiling load without problems such as poor appearance accompanying uneven distribution of the antifouling agent on the surface of the coating film, and lamination using the laminated antifouling coating film A base material with an antifouling coating film, a manufacturing method thereof, and an antifouling method are provided. Furthermore, according to the present invention, there are provided a coating kit for forming a laminated antifouling coating film, and an upper layer antifouling coating composition used in the production of the antifouling coating film.

When an antifouling coating film is formed using a conventional antifouling coating material as shown in Patent Documents 1 to 3, there is a problem that the organic antifouling agent is unevenly distributed in the vicinity of the surface of the coating film depending on the external environment. As a result of earnest examination, the present inventors have found that the lower layer antifouling coating film (X) contains a specific polymer (B1) and an organic antifouling agent (C1), and on the lower layer antifouling coating film (X) contains a hydrolyzable polymer (A2) By forming the upper antifouling coating film (Y) that It discovered that high antifouling|stain-resistant performance was exhibited over a long term, and came to complete this invention.

Although the detailed mechanism of action by which the said effect is obtained is not necessarily clear, a part is estimated as follows. That is, even when the organic antifouling agent (C1) contained in the lower layer antifouling coating film (X) is unevenly distributed near the surface of the lower layer antifouling coating film (X) when the lower layer antifouling coating film (X) is formed, the lower layer antifouling coating film ( By providing the upper antifouling coating film Y on X), it is thought that the uneven distribution to the surface vicinity of the organic antifouling agent (C1) as the whole laminated antifouling coating film is suppressed, and generation|occurrence|production of an appearance defect is suppressed.

In addition, in the laminated antifouling coating film, since the organic antifouling agent (C1) is temporally supplied from the lower antifouling coating film (X) in the upper antifouling coating film (Y), high antifouling agent (C1) from the initial stage over a long period of time It is assumed that performance can be achieved. On the other hand, since the upper layer antifouling coating film (Y) contains the hydrolyzable polymer (A2), the antifouling property is exhibited also by the coating-film renewability which the upper layer antifouling coating film (Y) has. In particular, the upper antifouling coating composition (y) for forming the upper antifouling coating film (Y) contains an organic solvent (D2), and the organic solvent (D2) is a polymer (B1) contained in the lower antifouling coating film (X). And if the organic antifouling agent (C1) is soluble, when the upper antifouling coating composition (y) is applied to the lower antifouling coating film (X), the organic antifouling agent (C1) is extracted in the upper antifouling coating composition (y), and the upper antifouling coating composition (y) is extracted Since an appropriate amount of the organic antifouling agent (C) is supplied in the coating film (Y), it is estimated that high antifouling performance can be exhibited from the initial stage.

In addition, compared with an antifouling coating film in which an organic antifouling agent is uniformly distributed in a general antifouling coating film or is unevenly distributed toward the surface layer, the multilayer antifouling coating film of the present invention has a concentration of the organic antifouling agent (C1) toward the lower layer. is considered to have a high concentration gradient, and in terms of dissipation due to diffusion from the coating film of the organic antifouling agent in water, when the coating film renewal from the upper layer to the lower layer reaches the lower layer, the concentration of the organic antifouling agent (C1) It is also estimated that the antifouling performance becomes good because it can keep it high.

Hereinafter, the lower layer antifouling coating composition (x) suitable for the formation of the lower layer antifouling coating film (X) and the lower layer antifouling coating film (X), and the upper layer antifouling coating material suitable for the formation of the upper layer antifouling coating film (Y) and the upper antifouling coating film (Y) The composition (y) is demonstrated.

In addition, in the description below, the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) are collectively referred to as an antifouling coating composition or a coating composition. In addition, the hydrolyzable polymer contained in the lower layer antifouling coating composition (x) is a hydrolyzable polymer (A1), and the hydrolyzable polymer contained in the upper layer antifouling coating composition (y) is a hydrolyzable polymer (A2), as in the lower layer antifouling coating composition For each component contained in (x), 1 is followed by the alphabet indicating the component, and 2 is placed after the alphabet indicating the component to each component contained in the upper layer antifouling coating composition (y). As in A), it shall be written without numbers.

<The lower layer antifouling coating film (X) and the lower layer antifouling coating composition (x), and the upper layer antifouling coating film (Y) and the upper layer antifouling coating composition (y)>

The laminated antifouling coating film of this invention consists of a lower layer antifouling coating film (X) and an upper layer antifouling coating film (Y) laminated|stacking. It is preferable that the lower layer antifouling coating film (X) and the upper layer antifouling coating film (Y) are adjacent layers.

The lower layer antifouling coating film (X) contains a polymer (B1) and an organic antifouling agent (C1). The lower layer antifouling coating film (X) may further contain a hydrolyzable polymer (A1).

In addition, the lower layer antifouling coating composition (x) suitably used for the formation of the lower layer antifouling coating film (X) contains the polymer (B1) and the organic antifouling agent (C1), and it is preferable to further contain the organic solvent (D1) do. Moreover, in addition to the said component, you may contain a hydrolysable polymer (A1).

The upper layer antifouling coating film (Y) contains a hydrolyzable polymer (A2).

Moreover, it is preferable that the upper layer antifouling coating composition (y) used suitably for formation of the upper layer antifouling coating film (Y) contains the organic solvent (D2) in addition to a hydrolysable polymer (A2).

Hereinafter, each component used for an antifouling coating film and an antifouling coating composition is demonstrated.

(hydrolysable polymer (A1) and hydrolysable polymer (A2))

In the present invention, the upper antifouling coating film (Y) may contain the hydrolyzable polymer (A2), and the lower antifouling coating film (X) may contain the hydrolyzable polymer (A1). Here, as mentioned above, a hydrolysable polymer (A1) and a hydrolysable polymer (A2) are collectively named, and it is also called a hydrolysable polymer (A).

When the upper layer antifouling coating film (Y) contains the hydrolyzable polymer (A2), the upper layer antifouling coating film (Y) is provided with suitable water resistance and antifouling properties by coating-film renewability. Moreover, when the lower layer antifouling coating film (X) contains a hydrolysable polymer (A1), moderate water resistance and coating film renewability are provided to the lower layer antifouling coating film (X).

The hydrolyzable polymer (A) preferably has (i) a structural unit derived from the hydrolyzable group-containing monomer (a1), and further (ii) has a structural unit derived from another monomer (a2).

In addition, in this invention, "a polymer having a structural unit derived from a" means a polymer in which a is introduced by polymerization reaction or chain transfer. Therefore, for example, when the monomer (a2) has a mercapto group, the radical polymerization terminal draws out H of -SH, and the generated -S ^· (S radical) is introduced into the hydrolyzable polymer in the form of initiating polymerization. However, even in such a case, the hydrolyzable polymer (A) has a structural unit derived from another monomer (a2).

Hereinafter, each structural unit is demonstrated.

[(i) Structural unit derived from hydrolyzable group-containing monomer (a1)]

The hydrolyzable polymer (A) has a structural unit derived from (i) a hydrolysable group-containing monomer (a1).

As the hydrolysable group-containing monomer (a1), a silyl ester group-containing monomer (a11) or a metal ester group-containing monomer (a12) is preferably exemplified.

When the upper layer antifouling coating composition (y) contains the hydrolyzable polymer (A2) having a structural unit derived from the silyl ester group-containing monomer (a11), the antifouling properties of the laminated antifouling coating film to be formed and the upper layer antifouling coating film (Y) and It is preferable from a viewpoint of making the interlayer adhesiveness of the lower layer antifouling coating film (X) favorable, etc.

In addition, when the upper layer antifouling coating composition (y) contains a hydrolyzable polymer (A2) having a structural unit derived from a metal ester group-containing monomer (a12), the antifouling properties of the laminated antifouling coating film formed and the coating film physical properties of the antifouling coating film It is preferable from a viewpoint of making a etc. favorable.

The content of the structural unit derived from the hydrolysable monomer (a1) in the hydrolysable polymer (A) is preferably 3 to 80 parts by mass, more preferably 5 to 100 parts by mass of all the structural units of the hydrolyzable polymer. -70 parts by mass.

-Silyl ester group-containing monomer (a11)-

As said silyl ester group containing monomer (a11), it is preferable to contain the compound represented by following formula (1-1).

(In formula (1-1), R ¹¹ represents a hydrogen atom or a methyl group, and R ¹² , R ¹³ and R ¹⁴ each independently represent a monovalent hydrocarbon group.)

In formula (1-1), R ¹¹ represents a hydrogen atom or a methyl group, and is preferably a methyl group from the viewpoint of improving the long-term antifouling properties and water resistance of the antifouling coating film.

In formula (1-1), R ¹² , R ¹³ and R ¹⁴ each independently represent a monovalent hydrocarbon group, and examples of such a hydrocarbon group include a linear, branched, or cyclic alkyl group and an aryl group. . The alkyl group preferably has 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms, and still more preferably 1 to 4 carbon atoms. Further, the aryl group preferably has 6 to 14 carbon atoms, more preferably 6 to 10 carbon atoms. ^{R 12} to ^{R 14 are} selected from isopropyl group, n-propyl group, sec-butyl group, n-butyl group, and phenyl group from the viewpoint of imparting suitable hydrolysis properties to the antifouling coating film to improve long-term antifouling properties and water resistance It is preferable that R ¹² to ^{R 14} are all isopropyl groups.

That is, as the silyl ester group-containing monomer (a11), triisopropylsilyl (meth)acrylate is particularly preferable, and triisopropylsilyl methacrylate is most preferable.

When the hydrolyzable polymer (A) has a structural unit derived from the monomer (a11), the amount of the structural unit derived from the monomer (a11) with respect to 100 parts by mass of the total structural units is from the viewpoint of improving the water resistance of the antifouling coating film. , Preferably it is 10-90 mass parts, More preferably, it is 40-80 mass parts, More preferably, it is 45-70 mass parts, More preferably, it is 45-65 mass parts.

On the other hand, the ratio of each content (mass) of each monomer, etc. derived from each monomer in the hydrolyzable polymer (A) can be regarded as the same as the ratio of the input amount (mass) of each monomer, etc. (reaction raw material) used in the polymerization reaction. have.

-Metal ester group-containing monomer (a12)-

In the present invention, the hydrolyzable group-containing monomer (a1) preferably contains a metal ester group-containing monomer (a12), and the metal ester group-containing monomer is a monomer (a121) represented by the following formula (1-2) and at least one of a monomer (a122) represented by the following formula (1-3).

(In formula (1-2), R ²¹ each independently represents a monovalent group containing a terminal ethylenically unsaturated group, and M represents a metal.)

Examples of the metal constituting the metal ester group include magnesium, calcium, neodymium, titanium, zirconium, iron, ruthenium, cobalt, nickel, copper, zinc and aluminum.

In the formula (1-2), M is a divalent metal, and a divalent metal may be appropriately selected from among the above-mentioned metals. Among these, metals of Groups 10 to 12 such as nickel, copper and zinc are preferable, copper and zinc are more preferable, and zinc is still more preferable.

In formula (1-2), R ²¹ represents a monovalent group containing a terminal ethylenically unsaturated group (CH ₂ ^{=C<), and the number of carbon atoms of R 21} is preferably 2 to 50, more preferably 2 to 30, more preferably 2 to 10, still more preferably 2 to 6. R ²¹ should just have a terminal ethylenically unsaturated group, and may have an ethylenically unsaturated group other than a terminal, However, it is more preferable to have an ethylenically unsaturated group only at the terminal.

R ²¹ is preferably an unsaturated aliphatic hydrocarbon group containing a terminal ethylenically unsaturated group, and the unsaturated aliphatic hydrocarbon group may have an ester bond, an amide bond, or an ether bond in the carbon chain. Specifically as R ²¹ , acrylic acid (2-propenoic acid), methacrylic acid (2-methyl-2-propenoic acid), 3-butenoic acid, 4-penthenic acid, 10-undecenoic acid, and 3-(meth)acrylic acid From aliphatic unsaturated monocarboxylic acids which have terminal ethylenically unsaturated groups, such as royloxypropionic acid and 3-(meth)acryloyloxy-2-methylpropionic acid, the group except a carboxy group is illustrated. Moreover, the group except one carboxy group is illustrated from the aliphatic unsaturated dicarboxylic acid containing terminal ethylenically unsaturated groups, such as itaconic acid.

Among these, R ²¹ is preferably a group obtained by removing a carboxy group from an aliphatic unsaturated monocarboxylic acid containing a terminal ethylenically unsaturated group, and more preferably a group obtained by removing a carboxy group from acrylic acid, methacrylic acid, or (meth)acryloyloxyalkylcarboxylic acid. and, more preferably a group obtained by removing a carboxy group from acrylic acid or methacrylic acid.

Such a monomer (a121) is preferably a monomer (a121') represented by the following formula (1-2').

(In formula (1-2'), R ²² each independently represents a hydrogen atom or a methyl group, and M' represents copper or zinc.)

Examples of the monomer (a121) represented by the formula (1-2) include zinc diacrylate, zinc dimethacrylate, zinc acrylic acid (methacrylic acid), zinc di(3-acryloyloxypropionic acid), and zinc di(3-methacrylate). Acryloyloxypropionic acid) zinc, di(3-(meth)acryloyloxy-2-methylpropionic acid) zinc, diacrylic acid copper, dimethacrylic acid copper, acrylic acid (methacrylic acid) copper, di(3-acrylic acid) Royloxypropionic acid) copper, di(3-methacryloyloxypropionic acid) copper, and di(3-(meth)acryloyloxy-2-methylpropionic acid) copper are illustrated.

(In formula (1-3), R ³¹ represents a monovalent group containing a terminal ethylenically unsaturated group, R ³² represents a monovalent organic group having 1 to 30 carbon atoms not containing a terminal ethylenically unsaturated group, and M represents a metal indicate.)

In formula (1-3), R ³¹ represents a monovalent group containing a terminal ethylenically unsaturated group. As R ^{31 , the same group as R 21} in Formula (1-2) is exemplified, and a preferred embodiment is also the same.

In formula (1-3), R ³² represents a C1-C30 monovalent organic group which does not contain a terminal ethylenically unsaturated group. Examples of R ³² include an aliphatic hydrocarbon group having 1 to 30 carbon atoms, an alicyclic hydrocarbon group having 3 to 30 carbon atoms and an aromatic hydrocarbon group having 6 to 30 carbon atoms which do not contain a terminal ethylenically unsaturated group. These groups may have a substituent. A hydroxyl group is illustrated as this substituent.

The aliphatic hydrocarbon group may be either linear or branched, and may be a saturated aliphatic hydrocarbon group or an unsaturated aliphatic hydrocarbon group. On the other hand, when R ³² is an unsaturated aliphatic hydrocarbon group, R ³² contains no terminal ethylenically unsaturated group. The carbon number of this aliphatic hydrocarbon group is 1-30, Preferably it is 1-28, More preferably, it is 1-26, More preferably, it is 1-24. In addition, the aliphatic hydrocarbon group may be further substituted with an alicyclic hydrocarbon group or an aromatic hydrocarbon group.

The alicyclic hydrocarbon group may be a saturated alicyclic hydrocarbon group or an unsaturated alicyclic hydrocarbon group. The carbon number of this alicyclic hydrocarbon group is 3-30, Preferably it is 4-20, More preferably, it is 5-16, More preferably, it is 6-12. In addition, the said alicyclic hydrocarbon group may be further substituted by the aliphatic hydrocarbon group or an aromatic hydrocarbon group.

Carbon number of the said aromatic hydrocarbon group is 6-30, Preferably it is 6-24, More preferably, it is 6-18, More preferably, it is 6-10. On the other hand, the aromatic hydrocarbon group may be further substituted with an aliphatic hydrocarbon group or an alicyclic hydrocarbon group.

R ³² is preferably an organic acid residue formed from monobasic acid, specifically versatic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, abietic acid, neoabietic acid, pimalic acid , dehydroabietic acid, 12-hydroxystearic acid, and a group excluding a carboxy group from an organic acid selected from the group consisting of naphthenic acid are exemplified.

Among these, preferably a group obtained by removing a carboxy group from abietic acid, versatic acid, or naphthenic acid, more preferably a group obtained by removing a carboxy group from abietic acid or versatic acid.

Such a monomer (a122) is preferably a monomer (a122') represented by the following formula (1-3').

(In formula (1-3'), R ³³ represents a hydrogen atom or a methyl group, R ³⁴ represents a C1-C30 monovalent organic group not containing a terminal ethylenically unsaturated group, M' represents copper or zinc .)

As a monomer (a122) represented by Formula (1-3), 3-(meth)acryloyloxypropionic acid (rosin) zinc, 3-(meth)acryloyloxypropionic acid (versatic acid) zinc, (meth)acrylic acid (rosin) zinc, (meth)acrylic acid (versatic acid) zinc, (meth)acrylic acid (naphthenic acid) zinc, 3-(meth)acryloyloxypropionic acid (rosin) copper, 3-(meth)acryloyloxypropionic acid (versatic acid) copper, (meth)acrylic acid (rosin) copper, (meth)acrylic acid (versatic acid) copper, and (meth)acrylic acid (naphthenic acid) copper are illustrated.

When the hydrolyzable polymer (A) has a structural unit derived from the monomer (a122) represented by the formula (1-3), the hydrolyzable polymer (A) is a polymerizable compound represented by the formula (1-3) It is preferable to have a structural unit obtained by superposing|polymerizing only the terminal ethylenically unsaturated group in (monomer (a122)).

When the hydrolyzable polymer (A) has a structural unit derived from a monomer (a121) or (a122), the content of the structural unit derived from the monomers (a121) and (a122) with respect to 100 parts by mass of all the structural units is, In total, from a viewpoint of making the antifouling|stain-resistant performance and water resistance of an antifouling|stain-resistant coating film favorable, Preferably it is 3-40 mass parts, More preferably, it is 5-30 mass parts.

[(ii) Structural units derived from other monomers (a2)]

In the present invention, the hydrolyzable polymer (A) preferably has a structural unit derived from (ii) another monomer (a2).

As said other monomer (a2), the monomer copolymerizable with the said monomer (a1) can be used without limitation. Among these, it is preferable that another monomer (a2) is an ethylenically unsaturated compound.

As said other monomer (a2), for example,

polyorganosiloxane block-containing monomer (a21);

Methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert- Butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethyl Hexyl (meth)acrylate, 3,5,5-trimethylhexyl (meth)acrylate, lauryl (meth)acrylate, cetyl (meth)acrylate, stearyl (meth)acrylate, phenyl (meth)acrylic alkyl (meth)acrylates or aryl (meth)acrylates such as acrylate and benzyl (meth)acrylate;

2-Methoxyethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, 4-methoxybutyl (meth)acrylate, 3-methoxy-n-propyl (meth)acrylate, 2-pro Poxyethyl (meth)acrylate, 2-butoxyethyl (meth)acrylate, isobutoxybutyldiglycol (meth)acrylate, 2-phenoxyethyl (meth)acrylate, methoxypolyethylene glycol Alkoxyalkyl (meth)acrylates such as (meth)acrylate, ethoxypolyethylene glycol (meth)acrylate, butoxypolyethylene glycol (meth)acrylate, and phenoxypolyethylene glycol (meth)acrylate ;

Hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate and 2-hydroxy-3-phenoxy hydroxyalkyl (meth)acrylates such as cypropyl (meth)acrylate;

glycidyl (meth)acrylate;

and vinyl compounds such as styrene, α-methylstyrene, vinyl acetate, vinyl benzoate, vinyltoluene, acrylonitrile, vinylpyridine, vinylpyrrolidone, and vinyl chloride, and particularly antifouling properties such as slime resistance It is preferable to include the polyorganosiloxane block-containing monomer (a21) in terms of improving the These monomers may be used individually by 1 type, and may use 2 or more types together.

The polyorganosiloxane block-containing monomer (a21) is a monomer having a polyorganosiloxane block and a chain transfer reactive group such as a polymerizable unsaturated group and/or a thiol group, and polyo to the formed hydrolyzable polymer (A) It is preferable from the point of introducing a organosiloxane block and improving antifouling performance, such as slime resistance, in particular.

The polyorganosiloxane block-containing monomer (a21) is preferably represented by the following formula (2).

(in formula (2), R ¹ , R ² and R ³ each independently represent a monovalent hydrocarbon group, each X independently represents a (meth)acryloyloxyalkyl group or a mercaptoalkyl group, and m is 1 or more; n is 0 or more, p and q are each independently 0 or 1, and n+p+q is 1 or more.)

In formula (2), R ¹ , R ^{2 ,} and R ³ each independently represent a monovalent hydrocarbon group, and examples of the hydrocarbon group include a linear, branched or cyclic alkyl group and an aryl group. The alkyl group preferably has 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms, and still more preferably 1 to 4 carbon atoms. Further, the aryl group preferably has 6 to 14 carbon atoms, more preferably 6 to 10 carbon atoms. R<^1> , R<^2>, and R<^3> have preferable alkyl groups, such as a methyl group and a butyl group, from a viewpoint of superposition|polymerization easiness.

In formula (2), each X independently represents a (meth)acryloyloxyalkyl group or a mercaptoalkyl group, and from the viewpoint of uniform polymerization, a (meth)acryloyloxyalkyl group is preferable, and A mercaptoalkyl group is also preferable from a viewpoint of reducing a viscosity and making handling easy. As such X, (meth)acryloyloxyethyl group, (meth)acryloyloxypropyl group, (meth)acryloyloxybutyl group, mercaptomethyl group, mercaptoethyl group, mercaptopropyl group, mercaptobutyl group, etc. can be heard

In formula (2), m is 1 or more, n is 0 or more, p and q are each independently 0 or 1, and n+p+q is 1 or more.

Meanwhile, m and n mean the average number of repetitions of ^{(SiR 2} ₂ O) and (SiXR ^{3 O), respectively.}

In formula (2), it is preferable that m+n is 2 or more.

In addition, in this specification, when two or more different repeating units are described in parallel between [ ], it indicates that these repeating units may be repeated in any form and order of random, alternating, or block, respectively. That is, for example, in the formula -[Y ₃ -Z ₃ ]- (where Y and Z represent a repeating unit), a random phase such as -YYZYZZ- or an alternating phase such as -YZYZYZ- A block shape such as YYYZZZ- or -ZZZYYY- may be sufficient.

As a certain aspect, it is preferable that the hydrolysable polymer (A) has a structural unit derived from the monomer (a211) whose n is 0, p is 1, and q is 0 in Formula (2).

An antifouling coating composition containing such a hydrolyzable polymer (A) having a structural unit derived from such a monomer (a211) is particularly preferable from the viewpoint of forming an antifouling coating film having excellent antifouling properties.

It is preferable that m is 3-200, and, as for such a monomer (a211), it is more preferable that it is 5-70 from a viewpoint of superposition|polymerization easiness, etc.

As such a monomer (a211), a commercially available one can be used, for example, FM-0711 (one-terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn=1,000) manufactured by JNC Corporation. , FM-0721 (one-terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn=5,000), FM-0725 (one-terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn= 10,000), Shin-Etsu Chemical Co., Ltd. X-22-174ASX (one-terminal methacryloyloxyalkyl-modified organopolysiloxane, functional group equivalent 900 g/mol), KF-2012 (one-terminal methacryloyloxy) alkyl-modified organopolysiloxane, functional group equivalent of 4,600 g/mol), and X-22-2426 (one-terminal methacryloyloxyalkyl-modified organopolysiloxane, functional group equivalent of 12,000 g/mol).

Moreover, as a certain aspect, it is also preferable that the hydrolysable polymer (A) has a structural unit derived from the monomer (a212) whose n is 0 and p and q are 1 in Formula (2).

An antifouling coating composition containing such a hydrolyzable polymer (A) having a structural unit derived from the monomer (a212) is preferable because the interlayer adhesiveness of the laminated antifouling coating film to be formed tends to be good.

It is preferable that it is 3-200, and, as for such a monomer (a212), it is more preferable that it is 5-70 from viewpoints, such as superposition|polymerization easiness.

As such a monomer (a212), a commercially available one can be used, for example, FM-7711 manufactured by JNC Corporation (both terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn = 1,000) , FM-7721 (methacryloyloxyalkyl modified organopolysiloxane at both ends, number average molecular weight Mn = 5,000), FM-7725 (methacryloyloxyalkyl modified organopolysiloxane at both ends, number average molecular weight Mn = 10,000), X-22-164 manufactured by Shin-Etsu Chemical Co., Ltd. (methacryloyloxyalkyl-modified organopolysiloxane at both ends, functional group equivalent of 190 g/mol), X-22-164AS (methacryloyl at both ends) Iloxyalkyl-modified organopolysiloxane, functional group equivalent of 450 g/mol), X-22-164A (both ends methacryloyloxyalkyl-modified organopolysiloxane, functional group equivalent of 860 g/mol), X-22-164B (sock) However, methacryloyloxyalkyl-modified organopolysiloxane, functional group equivalent 1630 g/mol), X-22-164C (both ends methacryloyloxyalkyl-modified organopolysiloxane, functional group equivalent 2,370 g/mol), X- 22-164E (both ends methacryloyloxyalkyl-modified organopolysiloxane, functional group equivalent 3,900 g/mol), X-22-167B (both ends mercaptoalkyl-modified organopolysiloxane, functional group equivalent 1,670 g/mol) can be heard

Moreover, as a certain aspect, it is also preferable that the hydrolysable polymer (A) has a structural unit derived from the monomer (a213) in which X is a mercaptoalkyl group in Formula (2), and n is 1 or more.

When the hydrolyzable polymer (A) has a structural unit derived from such a monomer (a213), it is preferable from the viewpoint of low viscosity and easy handling.

As for such a monomer (a213), from a viewpoint of superposition|polymerization easiness, etc., m becomes like this. Preferably it is 50-1,000, n becomes like this. Preferably it is 1-30.

As such a monomer (a213), commercially available ones can be used, for example, KF-2001 (branched chain mercaptoalkyl-modified organopolysiloxane, functional group equivalent: 1,900 g/mol) manufactured by Shin-Etsu Chemical Co., Ltd.; KF-2004 (branched mercaptoalkyl-modified organopolysiloxane, functional group equivalent of 30,000 g/mol) is mentioned.

The content of the structural unit derived from the monomer (a21) in the hydrolyzable polymer (A) is, from the viewpoint of the antifouling performance, water resistance, and interlayer adhesion under the dry and wet alternating conditions of the antifouling coating film, 100 parts by mass of all the structural units, Preferably it is 0.5-60 mass parts, More preferably, it is 1-50 mass parts, More preferably, it is 2-50 mass parts, More preferably, it is 5-50 mass parts.

The hydrolyzable polymer (A) can be obtained by synthesizing a hydrolysable group-containing monomer (a1) and, if necessary, other monomers (a2) by a known method.

For example, when the hydrolyzable group-containing monomer (a1) contains the monomer (a121) or (a122), for example, an inorganic metal compound (preferably an oxide, hydroxide, chloride, etc. of copper or zinc) ) and an organic acid such as methacrylic acid or acrylic acid, or an ester thereof, can be synthesized by a known method such as heating and stirring at a temperature below the decomposition temperature of a metal salt in the presence of an organic solvent and water.

More specifically, first, a mixture solution in which a solvent and a metal component such as zinc oxide are mixed is stirred while heating to about 50 to 80° C., and an organic acid such as methacrylic acid or acrylic acid or an ester thereof, and a mixed solution such as water A monomer (a121) or (a122) is prepared by dripping and further stirring.

Next, a solvent is placed in a newly prepared reaction vessel and heated to about 80 to 120° C., and a mixture of the above monomers (a121) or (a122) and other monomers (a2), polymerization initiator, chain transfer agent and solvent is added dropwise thereto. and polymerization reaction to obtain a metal ester group-containing hydrolyzable polymer (A).

There is no restriction|limiting in particular as a polymerization initiator which can be used for manufacture of a hydrolysable polymer (A), Various radical polymerization initiators can be used. Specifically, benzoyl peroxide, hydrogen peroxide, cumene hydroperoxide, tert-butyl hydroperoxide, potassium persulfate, sodium persulfate, 2,2'-azobis(isobutyronitrile) [AIBN], 2, 2'-azobis(2-methylbutyronitrile) [AMBN], 2,2'-azobis(2,4-dimethylvaleronitrile) [ADVN] and tert-butyl peroctoate [TBPO] and the like. These polymerization initiators may be used individually by 1 type, and may use 2 or more types together. In addition, these radical polymerization initiators may be added into the reaction system only at the time of reaction initiation, and may be added into the reaction system both at the time of reaction initiation and in the middle of reaction.

As for the usage-amount of the polymerization initiator in manufacture of a hydrolysable polymer (A), 0.1-20 mass parts is preferable with respect to a total of 100 mass parts of said each monomer.

There is no restriction|limiting in particular as a chain transfer agent which can be used for manufacture of a hydrolysable polymer (A), For example, alpha-methylstyrene dimer, thioglycolic acid, diterpene, terpinolene, gamma-terpinene; mercaptans such as tert-dodecyl mercaptan and n-dodecyl mercaptan; halides such as carbon tetrachloride, methylene chloride, bromoform and bromotrichloroethane; Secondary alcohols, such as isopropanol and glycerol, etc. are mentioned. These chain transfer agents may be used individually by 1 type, and may use 2 or more types together.

When using a chain transfer agent in manufacture of a hydrolysable polymer (A), 0.1-5 mass parts of the usage-amount is preferable with respect to a total of 100 mass parts of said each monomer.

As a solvent which can be used for manufacture of a hydrolysable polymer (A), For example, aromatic solvents, such as toluene, xylene, and mesitylene; alcohols such as propanol, butanol, propylene glycol monomethyl ether and dipropylene glycol monomethyl ether; ketones such as methyl ethyl ketone, methyl isobutyl ketone, and methyl amyl ketone; esters such as ethyl acetate and butyl acetate; water and the like.

The number average molecular weight (Mn) and weight average molecular weight (Mw) of the hydrolyzable polymer (A) are preferably adjusted in consideration of the viscosity and storage stability of the antifouling coating composition, the dissolution rate (renewability) of the resulting antifouling coating film, and the like. do.

A number average molecular weight (Mn) becomes like this. Preferably it is 1,000-100,000, More preferably, it is 1,500-30,000. Moreover, the weight average molecular weight (Mw) becomes like this. Preferably it is 2,000-200,000, More preferably, it is 3,000-60,000.

The said number average molecular weight (Mn) and weight average molecular weight (Mw) are calculated|required by measuring by gel permeation chromatography and converting into standard polystyrene.

A hydrolysable polymer (A) may be used individually by 1 type, and may use 2 or more types together.

The content of the hydrolyzable polymer (A) in the lower layer antifouling paint composition (x) and the upper layer antifouling paint composition (y) is an antifouling paint from the viewpoint of improving the coating workability of the antifouling paint and the antifouling property of the antifouling coating film in the present invention. In the solid content of the composition, preferably 5 mass% or more, more preferably 10 mass% or more, more preferably 99 mass% or less, more preferably 95 mass% or less, still more preferably 90 mass% or less, Even more preferably, it is 88 mass % or less.

On the other hand, in the present invention, when the lower layer antifouling coating composition (x) or the upper layer antifouling coating composition (y) contains two or more types of the hydrolyzable polymer (A), the above content is the total content of the hydrolyzable polymer (A) It is a preferable range as , and it is the same also about each component mentioned later.

When the hydrolyzable polymer (A) has a structural unit derived from the silyl ester group-containing monomer (a11), the content of the hydrolyzable polymer (A) in the solid content of the lower layer antifouling coating composition (x) or the upper layer antifouling coating composition (y) Silver becomes like this. Preferably it is 5-60 mass %, More preferably, it is 10-50 mass %, More preferably, it is 12-40 mass %.

Further, when the hydrolyzable polymer (A) has a structural unit derived from a metal ester group-containing monomer, preferably a monomer (a121) and/or a monomer (a122), the lower layer antifouling coating composition (x) or the upper layer antifouling coating composition Content of the hydrolyzable polymer (A) in solid content of (y) becomes like this. Preferably it is 10-99 mass %, More preferably, 15-95 mass %, More preferably, it is 20-90 mass %, More preferably, It is 25-88 mass %.

In the present invention, when the hydrolyzable polymer (A) has a structural unit derived from the polyorganosiloxane block-containing monomer (a21), in order to increase the slime resistance presumed to be due to the contribution of the polyorganosiloxane block, It is preferable to make high the content rate of the hydrolysable polymer (A) in an antifouling|stain-resistant coating film.

On the other hand, in the present invention, when the coating composition contains two or more hydrolyzable polymers (A), the above content is a preferable range as the total content of the hydrolyzable polymer (A), and the same applies to each component to be described later.

(Polymer (B1))

In the present invention, the lower layer antifouling coating film (X) and the lower layer antifouling coating composition (x) contain a polymer (B1). The lower layer antifouling coating film (X) and the lower layer antifouling coating composition (x) may contain the above-mentioned hydrolyzable polymer (A1) in addition to the polymer (B1).

On the other hand, the polymer (B1) is a polymer having a structural unit derived from a monomer having an unsaturated double bond, and is a polymer other than the hydrolyzable polymer (A) described above. Therefore, even if it has a structural unit derived from a monomer having an unsaturated double bond, the polymer having a structural unit derived from the silyl ester group-containing monomer (a11) and/or the metal ester group-containing monomer (a12) is in the polymer (B1). does not apply

That is, the polymer (B1) does not contain a structural unit derived from the hydrolyzable group-containing monomer (a1).

In the present invention, the polymer (B1) is preferably soluble in the organic solvent (D2) contained in the upper antifouling coating composition (y). In addition, in this invention, "soluble phosphorus" means that the solubility in 23 degreeC is 1 g/L or more.

As for the polymer (B1), it is more preferable that the solubility with respect to the organic solvent (D2) in 23 degreeC is 10 g/L or more. If such a polymer (B1) is used, the organic antifouling agent (C1) can be efficiently supplied to the upper antifouling coating film (Y) formed from the upper antifouling coating composition (y), and the upper antifouling coating film (Y) and the lower layer The interlayer adhesiveness of the antifouling coating film (X) can be improved.

The polymer (B1) is preferably a thermoplastic resin. When polymer (B1) is a thermoplastic resin, favorable adhesiveness with a base material will be acquired, and favorable solubility with respect to the organic solvent (D2) contained in upper layer antifouling-coating composition (y) will be easy to be acquired.

Specific examples of such a polymer (B1) include chlorinated polyolefins such as chlorinated rubber, chlorinated polyethylene, and chlorinated polypropylene; (meth)acrylic acid methyl copolymer, (meth)acrylic acid ethyl copolymer, (meth)acrylic acid propyl copolymer, (meth)acrylic acid butyl copolymer, (meth)acrylic acid cyclohexyl copolymer, such as acrylic resin; Vinyl chloride-based resins such as vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl propionate copolymer, vinyl chloride-isobutylvinyl ether copolymer, vinyl chloride-isopropylvinyl ether copolymer, and vinyl chloride-ethylvinyl ether copolymer (salt ratio copolymer); styrene-based resin; aromatic petroleum resin; aliphatic petroleum resins; urea aldehyde condensation-based resin; Ketone-type resin etc. are mentioned.

It is preferable that the polymer (B1) contains the structural unit derived from vinyl chloride from a viewpoint of being excellent in the adhesiveness with respect to the base material of the lower layer antifouling coating film (X), top coatability, etc. In addition to the structural unit derived from vinyl chloride, even if it has a structural unit derived from vinyl acetate, a structural unit derived from vinyl alcohol, or a structural unit derived from an alkylvinyl ether (for example, isobutyl vinyl ether, etc.) do.

Moreover, as another preferable aspect of a polymer (B1), the homopolymer or copolymer (henceforth (meth)acrylic-type polymer) of (meth)acrylic acid and/or (meth)acrylic acid ester is mentioned.

In this invention, the polymer (B1) may be used individually by 1 type, or 2 or more types may be used together, and as a preferable aspect, the polymer which has the structural unit derived from the above-mentioned vinyl chloride, and a (meth)acrylic-type polymer Combination is mentioned.

It is preferable that the range of the weight average molecular weight of a polymer (B1) is 5,000-100,000.

As such a polymer (B1), a commercially available one can be used, for example, "Laroflex MP25" (a copolymer of vinyl chloride and isobutyl vinyl ether) manufactured by BASF, "Sol" manufactured by Nisshin Chemical Industry Co., Ltd. Vine C" (copolymer of vinyl chloride and vinyl acetate), "Sorvine AL" (copolymer of vinyl chloride, vinyl acetate, and vinyl alcohol), Mitsubishi Rayon Co., Ltd. "Dianal BR-106" (acrylic copolymer) (acrylic resin)) etc. are mentioned.

The content of the polymer (B1) in the solid content of the lower layer antifouling coating composition (x), that is, in the lower layer antifouling coating film (X), is preferably 5 to 90 mass %, more preferably from the viewpoint of antifouling properties and physical properties of the laminate antifouling coating film. is 10 to 50 mass %.

In addition, the total content (total content) of the polymer (B1) and the hydrolyzable polymer (A1) in the solid content of the lower layer antifouling coating composition (x), that is, in the lower layer antifouling coating film (X), from the viewpoint of antifouling properties and physical properties of the laminate antifouling coating film , Preferably it is 1-90 mass %, More preferably, it is 5-60 mass %, More preferably, it is 10-50 mass %.

On the other hand, although the said upper layer antifouling-coating composition (y) may also contain the polymer (B2) arbitrarily, it is preferable not to contain the polymer (B2) from a viewpoint of coating-film renewability.

(Organic Antifouling Agent (C1))

In the present invention, the lower layer antifouling coating film (X) and the lower layer antifouling coating composition (x) contain an organic antifouling agent (C1).

In this invention, the organic antifouling agent (C1) is a compound which has antifouling property and does not contain a metal element. On the other hand, boron, which is a semimetal, does not correspond to a metallic element.

As an organic antifouling agent (C1), specifically, 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile (alias: tralopyryl); Boranes such as 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (alias: DCOIT), pyridine triphenylborane, and 4-isopropylpyridine diphenylmethylborane- Nitrogen base adduct, (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole (alias medetomidine), N,N-dimethyl-N'- (3,4-dichlorophenyl)urea (alias: diuron), N- (2,4,6-trichlorophenyl) maleimide, 2,4,5,6-tetrachloroisophthalonitrile, 2 -Methylthio-4-tert-butylamino-6-cyclopropylamino-1,3,5-triazine (alias: cybutrin), chloromethyl-n-octyldisulfide, N,N'-dimethyl -N'-phenyl-(N-fluorodichloromethylthio)sulfamide (alias: diclofluanide), tetraalkylthiuram disulfide (alias: TMTD), 2,3-dichloro-N- (2',6'-diethylphenyl)maleimide, 2,3-dichloro-N-(2'-ethyl-6'-methylphenyl)maleimide, etc. are illustrated.

On the other hand, in the antifouling coating composition or in the antifouling coating film, the case where the above-mentioned organic antifouling agent forms a salt is not excluded, and even if it forms a salt in this way, it corresponds to an organic antifouling agent.

In the present invention, it is preferable that the organic antifouling agent (C1) is soluble in the organic solvent (D2) described later contained in the upper layer antifouling coating composition (y), that is, the solubility at 23° C. is 1 g/L or more. , It is more preferable that the solubility with respect to the organic solvent (D2) in 23 degreeC is 10 g/L or more, and, as for the organic antifouling agent (C1), it is more preferable that it is 100 g/L or more.

The organic antifouling agent (C1) preferably contains at least one selected from tralopyryl and DCOIT from the viewpoint of imparting excellent antifouling properties to the laminated antifouling coating film, and in particular, from the viewpoint of improving antifouling properties against barnacle species, It is more preferable to contain tralopyril, and it is preferable to contain DCOIT, especially from a viewpoint of improving the antifouling property with respect to the slime which is a cell secretion.

An organic antifouling agent (C1) may be used individually by 1 type, and may use 2 or more types together.

The total content of the organic antifouling agent (C1) in the lower layer antifouling coating composition (x) can be arbitrarily selected according to the efficacy and cost of the compound used, but from the viewpoint of imparting excellent antifouling properties and physical properties to the laminated antifouling coating film, the lower layer antifouling agent In solid content of coating composition (x), Preferably it is 0.1-50 mass %, More preferably, it is 1-30 mass %, More preferably, it is 3-20 mass %. On the other hand, the content of the organic antifouling agent (C1) in the lower layer antifouling coating film (X) is determined by dissolution in the organic solvent (D2) contained in the upper layer antifouling coating composition (y) at the time of formation of the upper layer antifouling coating film (Y) , fluctuates with supply of the organic antifouling agent (C1) from the lower layer antifouling coating film (X) to the upper layer antifouling coating film (Y) in the laminated antifouling coating film. Therefore, it is most appropriate to prescribe content of organic antifouling agent (C1) by content in solid content of lower layer antifouling coating composition (x).

When the lower layer antifouling paint composition (x) contains tralopyryl as the organic antifouling agent (C1), from the viewpoint of improving the antifouling properties and coating film physical properties of the laminated antifouling coating film, and the interlayer adhesion, the content of tralopyril is the lower layer antifouling agent (C1). In solid content of coating composition (x), Preferably it is 1-30 mass %, More preferably, it is 3-20 mass %.

In the case where the lower layer antifouling coating composition (x) contains DCOIT as the organic antifouling agent (C1), from the same viewpoint, the content of DCOIT is preferably 0.5 to 15 mass in the solid content of the lower layer antifouling coating composition (x). %, More preferably, it is 1-12 mass %, More preferably, it is 2-10 mass %.

In addition, the said upper layer antifouling coating composition (y) may contain the organic antifouling agent (C2) arbitrarily in the range which does not become an obstacle to the subject to be solved by this invention. When the upper layer antifouling coating composition (y) contains the organic antifouling agent (C2), the antifouling performance of the laminated antifouling coating film can be further improved. When the upper layer antifouling coating composition (y) contains the organic antifouling agent (C2), the same as those described above can be used, but from the viewpoint of saving resources, the content of the organic antifouling agent (C2) in the upper layer antifouling coating composition (y) is , it is preferable that the content of the organic antifouling agent (C2) in the upper antifouling coating film (Y) is lower than the content of the organic antifouling agent (C) in the lower antifouling coating film (X). In addition, from the viewpoint of not generating precipitates on the surface of the antifouling coating film when the upper layer antifouling paint composition (y) contains the organic antifouling agent (C2), among the compounds of the organic antifouling agent (C2) as described above, tralo It is also preferred to be substantially free of pyryl and DCOIT.

On the other hand, in the present invention, "the coating composition contains substantially no object" means that the concentration of the object in the solid content of the coating composition is less than 0.1 mass%, preferably 0.05 mass% or less, more preferably 0.03 It is mass % or less, More preferably, it is 0.01 mass % or less.

In addition, especially when the upper layer antifouling coating composition (y) contains a hydrolyzable copolymer (A2) having a structural unit derived from the silyl ester group-containing monomer (a11), the tralopyryl or pyridine triphenylborane; When a borane-nitrogen base adduct such as 4-isopropylpyridine diphenylmethylborane or a nitrogen-containing heterocyclic organic antifouling agent such as medetomidine is used in combination, in some cases, the coating composition is thickened over time Since problems such as these may be caused, it is particularly preferable not to contain them substantially.

When the upper layer antifouling coating composition (y) contains the organic antifouling agent (C2), the content thereof is preferably 0.1% by mass to 10% by mass in the solid content of the upper layer antifouling coating composition (y), more preferably 0.3 mass % - 5 mass %.

(organic solvent (D2))

In the present invention, the upper layer antifouling coating composition (y) is for the purpose of extracting the organic antifouling agent (C1) from the lower layer antifouling coating film (X) and adjusting the viscosity of the upper layer antifouling coating composition (y) Therefore, it is preferable to contain an organic solvent (D2). On the other hand, the upper layer antifouling coating composition (y) may contain the solvent used when preparing the hydrolyzable polymer (A2) as the organic solvent (D2), and may contain the hydrolyzable polymer (A2) and other components as needed. When mixing, you may contain the solvent added separately.

In the present invention, as the organic solvent (D2), the organic solvent (C1) and the polymer (B1) mentioned above are preferably soluble. In addition, in this invention, "soluble phosphorus" means that the solubility in 23 degreeC is 1 g/L or more.

As an organic solvent (D2), it is preferable that the solubility in 23 degreeC of an organic antifouling agent (C1) contains the thing of 10 g/L or more, and it is more preferable that the thing of 100 g/L or more is included.

Moreover, as an organic solvent (D2), it is preferable that the solubility in 23 degreeC of a polymer (B1) contains the thing of 10 g/L or more, and it is more preferable that the thing of 100 g/L or more is included.

Solubility can be determined by the following method, for example.

100 g of the solute for which solubility is to be measured and 1 L of the solvent are sufficiently stirred in a container to obtain a uniform suspension, and then the concentration of the medium in the symbol can be determined by measuring by a measuring method such as HPLC. When the mixture becomes a homogeneous solution, the solubility is 100 g/L or more.

Examples of the organic solvent (D2) include hydrocarbon-based organic solvents such as xylene, toluene, and ethylbenzene; ketone-based organic solvents such as methyl ethyl ketone, cyclohexanone, 4-methyl-2-pentanone (alias: methyl isobutyl ketone), and 2-heptanone (alias: methyl amyl ketone); aliphatic (C 1-10, preferably 2-5) alcohol-based organic solvents such as ethanol, isopropyl alcohol, n-butanol, isobutanol, propylene glycol monomethyl ether, and ethylene glycol; ester-based organic solvents such as ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, and isobutyl acetate; , n-butanol, isobutanol, propylene glycol monomethyl ether, n-butyl acetate, isobutyl acetate, and 2-heptanone are preferred.

As the organic solvent (D2) contained in the upper antifouling coating composition (y), from the viewpoint of effectively supplying the organic antifouling agent (C1) contained in the lower antifouling coating film (X) to the upper antifouling coating film (Y), the above-mentioned It is preferable to contain an ester type organic solvent or a ketone type organic solvent, and it is more preferable to contain an ester type organic solvent.

When the upper antifouling coating composition (y) contains an ester-based organic solvent or a ketone-based organic solvent as the organic solvent (D2), the content is preferably 1 to 50% by mass in the upper antifouling coating composition (y), It is more preferable that it is 2-30 mass %.

The organic antifouling agent (C1) contained in the lower layer antifouling film (X) is 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile (alias: tralopyryl), in addition to the above viewpoint, from the viewpoint of supplying tralopyryl to the upper antifouling coating film (Y), in particular the alcohol-based organic solvent, ester-based organic solvent, or ketone-based organic solvent as described above. It is preferable to contain, and especially, it is preferable to contain the ester type organic solvent from a viewpoint of reducing the viscosity of an upper layer antifouling-paint composition (y) and making coating workability|operativity easy. When the lower layer antifouling coating film (X) contains tralopyryl and the upper layer antifouling coating composition (y) contains an alcohol-based organic solvent, an ester-based organic solvent, or a ketone-based organic solvent, the content thereof is the upper antifouling coating composition (y) It is preferable that it is 2-50 mass % in ), and it is more preferable that it is 5-30 mass %.

An organic solvent (D2) may be used individually by 1 type, and may use 2 or more types together.

In the present invention, it is preferable that the organic solvent (D2) contained in the upper antifouling coating composition (y) is soluble in the organic antifouling agent (C1) contained in the lower antifouling coating film (X) and the lower antifouling coating composition (x). do. Here, when organic solvent (D2) contains 2 or more types of organic solvents that organic solvent (D2) is soluble in organic antifouling agent (C1), it is the most content (mass) in (i) organic solvent (D2) %) is soluble in many organic solvents, or (ii) soluble in the entire organic solvent (D2) contained in the upper layer antifouling coating composition (y), which is a mixture of two or more organic solvents. means to do On the other hand, "soluble phosphorus" means that the solubility at 23°C is 1 g/L or more, preferably 10 g/L or more, and more preferably 100 g/L or more, as described above.

In the present invention, the content of the organic solvent (D2) in the upper layer antifouling coating composition (y) is determined from the viewpoints of the coating workability of the upper layer coating composition (y), drying properties of the coating film, environmental emission, and the like, and the lower layer antifouling coating film (X) ) from the viewpoint of supplying the organic antifouling agent (C1) into the upper antifouling coating film (Y), preferably 5 to 90 mass%, more preferably 10 to 90 mass%, still more preferably 20 to 80 mass%, More preferably, it is 40-70 mass %.

In the present invention, the lower layer antifouling coating composition (x) may also contain the organic solvent (D1). As an organic solvent (D1), the thing similar to the organic solvent (D2) which the upper layer antifouling-coating composition (y) contains is illustrated.

Moreover, content of the organic solvent (D1) in the lower layer antifouling coating composition (x) becomes like this. Preferably it is 5-90 mass %, More preferably, it is 10-70 mass %.

(Other ingredients)

In the present invention, the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) may contain other components in addition to the above-mentioned components.

[Other antifouling agents (E)]

The coating composition of the present invention may further contain other antifouling agents (E) for the purpose of further improving the antifouling properties of the coating film to be formed. In the present invention, the other antifouling agent (E) is an antifouling agent other than the organic antifouling agent (C), and contains a metal element. In addition, the organic antifouling agent (C) and other antifouling agents (E) are collectively referred to as an antifouling agent.

As described above, the laminated antifouling coating film of the present invention exhibits excellent antifouling properties by optimal use of the organic antifouling agent (C1) derived from the lower layer antifouling coating film (X), but in particular, the upper layer antifouling coating composition (y) contains other antifouling agents ( By containing E), the antifouling|stain-resistant performance can further be improved. In one aspect, the present invention has the effect that it is possible to reduce such an antifouling agent, which is originally required to obtain an antifouling performance capable of responding to a high soiling environment, and to reduce the release of such an antifouling agent to the external environment. it will be obtained

In addition, when the underlayer coating composition (x) contains other antifouling agents (E), good antifouling properties are exhibited in the coating film in a situation where the coating film requires antifouling properties.

As another antifouling agent (E), For example, metal pyrithions, such as cuprous oxide, copper oxide, copper (metal copper), copper thiocyanate (another name: rodan copper), copper pyrithione, and zinc pyrithione Onryu, bisdimethyldithiocarbamoyl zinc ethylenebisdithiocarbamate (alias: polycarbamate), zinc dimethyldithiocarbamate (alias: Ziram), zinc ethylenebisdithiocarbamate, etc. Among these, it is preferable to contain metal pyrithions, such as cuprous oxide, copper pyrithion, and zinc pyrithion.

Among these, those having an average particle diameter of about 0.1 to 30 µm of cuprous oxide are preferable in order to exhibit long-term antifouling properties, and those that are surface-treated with glycerin, stearic acid, lauric acid, sucrose, lecithin, mineral oil, etc. have long-term stability during storage. It is preferable in terms of As such a commercial item of cuprous oxide, NC-301 (manufactured by NC Tech Co., Ltd.), NC-803 (manufactured by NC Tech Co., Ltd.), Red Copp97N Premium (manufactured by AMERICAN CHEMET Co.), Purple Copp (AMERICAN CHEMET) Co.), LoLoTint97 (manufactured by AMERICAN CHEMET Co.), and the like.

Other antifouling agents (E) may be used individually by 1 type, and may use 2 or more types together.

In the present invention, when the antifouling coating composition contains other antifouling agents (E), the total content thereof can be arbitrarily selected from the viewpoint of the effect of the compound to be used or the ease of availability. It is preferable that it is 0.1-90 mass % in solid content of each antifouling|stain-resistant coating composition from a viewpoint of reducing the viewpoint or environmental load.

When the lower layer antifouling coating composition (x) or the upper layer antifouling coating composition (y) respectively contains cuprous oxide or copper rhodanide, the total content thereof is preferably 10 to 80% by mass, more Preferably it is 30-70 mass %.

When the lower layer antifouling coating composition (x) or the upper layer antifouling coating composition (y) respectively contains zinc pyrithione or copper pyrithione, the total content thereof is preferably 0.5 to 30 in the solid content of each coating composition. It is mass %, More preferably, it is 1-20 mass %.

[Other Pigments (F)]

The coating composition of this invention may contain other pigments (F) other than an antifouling agent for the purpose of coloring to a coating film, and concealment of an underlying material, and also for the purpose of adjusting to an appropriate coating-film intensity|strength.

Examples of the other pigment (F) include zinc oxide, talc, mica, clay, kaleidoscope, calcium carbonate, kaolin, alumina white, white carbon, aluminum hydroxide, magnesium carbonate, barium carbonate, barium sulfate, calcium sulfate, sulfide. Extender pigments, such as zinc, and colored pigments, such as diaphragm (red iron oxide), titanium white (titanium oxide), yellow iron oxide, carbon black, naphthol red, and phthalocyanine blue, among them, zinc oxide, It is preferable to include talc. These other pigments (F) may be used individually by 1 type, and may use 2 or more types together.

When the coating composition of the present invention contains other pigments (F), the content thereof is determined in a preferable amount depending on the hiding properties required for the antifouling coating film to be formed and the viscosity of the antifouling coating composition, but 1 in the solid content of the coating composition -60 mass % is preferable.

[Monocarboxylic acid compound (G)]

The coating composition of this invention may contain the monocarboxylic acid compound (G).

In the present invention, the monocarboxylic acid compound (G) improves the renewability of the formed coating film from the surface in water, and when the coating film contains an antifouling agent, it promotes release of the antifouling agent into water. It improves the antifouling property of a coating film, and also has the function of providing moderate water resistance to an antifouling coating film further.

As the monocarboxylic acid compound (G), for example, when the monocarboxylic acid compound is represented by R-COOH, R is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 40 carbon atoms, or a saturated saturated hydrocarbon group having 3 to 40 carbon atoms. Or it is preferable that it is an unsaturated alicyclic hydrocarbon group, or these substituents.

Specifically, abietic acid, neoabietic acid, dehydroabietic acid, palustric acid, isopimalic acid, pimalic acid, trimethylisobutenyl cyclohexenecarboxylic acid, versatic acid, stearic acid, naphthenic acid, etc. are preferable. do.

Moreover, rosins which have abietic acid, palustric acid, isopimalic acid etc. as a main component are also preferable. Examples of the rosin include rosin such as gum rosin, wood rosin and tall oil rosin, hydrogenated rosin, disproportionated rosin, rosin derivatives such as metal rosin salt, and pine tar.

Further, examples of the trimethylisobutenyl cyclohexenecarboxylic acid include a reaction product of 2,6-dimethylocta-2,4,6-triene and methacrylic acid, which is 1,2,3 -trimethyl-5-(2-methylprop-1-en-1-yl)cyclohex-3-ene-1-carboxylic acid and 1,4,5-trimethyl-2-(2-methylprop- It has 1-en-1-yl) cyclohex-3-ene-1-carboxylic acid as a main component (85 mass % or more).

As for the monocarboxylic acid compound (G) in this invention, the one part or all may form the metal ester. The metal esters include, for example, zinc esters and copper esters, and may be formed in advance prior to preparation of the coating composition, or may be formed by reaction with other coating components during preparation of the coating composition.

A monocarboxylic acid compound (G) and/or its metal ester may be used individually by 1 type, and may use 2 or more types together.

When the coating composition of the present invention contains the monocarboxylic acid compound (G) and/or a metal ester thereof, from the viewpoint of the coating workability of the coating composition and the water resistance of the antifouling coating film, the content thereof is preferably in the solid content of the coating composition. is 0.1 to 50 mass%, more preferably 1 to 20 mass%.

[Dehydrating agent (H)]

The coating composition of the present invention may contain a dehydrating agent (H) in order to improve the storage stability thereof. Examples of the dehydrating agent (H) include synthetic zeolite, anhydrous gypsum (calcium sulfate), and hemihydrate gypsum (alias: calcined gypsum) as inorganic dehydrating agents, and examples of organic dehydrating agents include tetramethoxysilane, tetraethoxysilane, tetrabutoxy Alkoxysilanes, such as silane, tetraphenoxysilane, methyltriethoxysilane, dimethyl diethoxysilane, trimethylethoxysilane, or its condensate, Ortho such as methyl orthoformate, ethyl orthoformate, etc. formic acid alkyl esters are exemplified. A dehydrating agent (H) may be used individually by 1 type, and may use 2 or more types together.

When the coating composition of the present invention contains the dehydrating agent (H), the content thereof is preferably 0.1 to 20% by mass, more preferably 0.2 to 15% by mass, based on the solid content of the coating composition. to be.

[Plasticizer (I)]

The coating composition of the present invention may contain a plasticizer (I) for the purpose of imparting plasticity to the antifouling coating film.

Examples of the plasticizer (I) include tricresyl phosphate (TCP), dioctyl phthalate (DOP), and diisodecyl phthalate (DIDP). These plasticizers may be used individually by 1 type, and may use 2 or more types together.

When the coating composition of the present invention contains the plasticizer (I), the content thereof is preferably 0.1 to 10% by mass, more preferably 0.5 to 10% by mass, in the solid content of the coating composition. to be. When content of plasticizer (I) exists in the said range, the plasticity of a coating film can be maintained favorably.

[Anti-sag and anti-settling agent (J)]

The coating composition of this invention may contain antisag and antisettling agent (J) for the purpose of adjusting the viscosity of a coating composition.

Examples of the anti-sag and anti-settling agent (J) include organic clay waxes (stearate salts of Al, Ca, Zn, lecithin salts, alkyl sulfonates, etc.), organic waxes (polyethylene wax, polyethylene oxide wax, amide wax, polyamide wax, etc.) , hydrogenated castor oil wax, etc.), a mixture of an organic clay wax and an organic wax, and synthetic finely divided silica.

A commercial item may be used as an anti-sag agent and anti-settling agent (J), for example, "Disparon 305", "Disparon 4200-20", "Disparon A630-20X" manufactured by Kusumoto Chemical Co., Ltd. ', "Disparon 6900-20X", "ASA D-120" manufactured by Ito Oil Co., Ltd., etc. are mentioned.

An anti-settling agent and anti-settling agent (J) may be used individually by 1 type, and may use 2 or more types together.

When the coating composition of the present invention contains the anti-sag and anti-settling agent (J), the content is preferably 0.1 to 10 mass%, more preferably 0.2 to 5 mass, in the solid content of the coating composition. % is the quantity.

[Binder component (K)]

The coating composition of the present invention may contain a binder component (K) for the purpose of imparting water resistance, crack resistance, and strength to the formed antifouling coating film.

Examples of the binder component (K) include chlorinated paraffin, n-paraffin, polyester-based polymers, terpene phenol resins, petroleum resins, and ketone resins. Among these, chlorinated paraffin, polyester-based polymers, and petroleum resins are preferable.

A binder component (K) may be used individually by 1 type, and may use 2 or more types together.

The chlorinated paraffin may have either a linear or branched molecular structure, and may be liquid or solid (eg, powder) under room temperature (eg, 23° C.) conditions.

Further, the chlorinated paraffin has an average carbon number of preferably 8 to 30, more preferably 10 to 26 per molecule. The antifouling coating composition containing such chlorinated paraffin can form an antifouling coating film with few cracks (cracks) or peeling. On the other hand, when the said average carbon number is less than 8, the effect which suppresses generation|occurrence|production of a crack in a coating film may run short.

In addition, the viscosity (unit poise, measurement temperature of 25 ° C.) of the chlorinated paraffin is preferably 1 or more, more preferably 1.2 or more, and the specific gravity (25 ° C.) is preferably 1.05 to 1.80 g/cm ³ , More preferably, it is 1.10 to 1.70 g/cm ³ .

The chlorination rate (chlorine content) of chlorinated paraffin is usually 35 to 70 parts by mass, preferably 35 to 65 parts by mass, when chlorinated paraffin is 100 parts by mass. A coating composition containing chlorinated paraffin having such a chlorination rate can form a coating film with few cracks (cracks), peeling, and the like.

The polyester-based polymer is obtained by reacting at least one polyhydric alcohol with at least one polyhydric carboxylic acid and/or anhydride thereof, and optionally other components, and any kind may be used in any amount, and a hydroxyl group by the combination Value/acid value and viscosity can be adjusted.

Examples of the polyhydric alcohol include propylene glycol, glycerin, ethylene glycol, neopentyl glycol, 1,6-hexanediol, trimethylol propane (TMP), pentaerythritol, consuming toll; polyalkylene glycols such as diethylene glycol; etc. are mentioned, Propylene glycol, ethylene glycol, neopentyl glycol, glycerol, and TMP are preferable from the availability of raw material. You may use these polyhydric alcohols in combination of 2 or more types.

As said polyhydric carboxylic acid and/or its anhydride, malonic acid, maleic acid, fumaric acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, 1,9- nonamethylenedi Carboxylic acid, 1,10-decamethylene dicarboxylic acid, 1,11-undecamethylene dicarboxylic acid, 1,12-dodecamethylene dicarboxylic acid, cyclohexanedicarboxylic acid, decahydronaphthalenedicarboxylic acid, terephthalic acid, isophthalic acid, phthalic acid, Hexahydrophthalic acid, succinic acid, etc. and these anhydrides are mentioned, Phthalic anhydride, adipic acid, isophthalic acid, and hexahydrophthalic anhydride are preferable.

The polyester polymer preferably has a solid content hydroxyl value of 50 to 150 mgKOH/g, more preferably 80 to 120 mgKOH/g, from the viewpoint of imparting storage stability of the coating composition, antifouling property of the coating film, and moderate hydrophilicity.

The polyester-based polymer may be dissolved in a solvent and used as a solution (hereinafter, also referred to as a polyester-based polymer solution). As a solvent, what was mentioned as an organic solvent (D2) mentioned above can be used.

From the viewpoint of reducing the viscosity of the coating composition, the viscosity of the polyester-based polymer solution is preferably 3,000 mPa·s or less at 25°C, more preferably 1,000 mPa·s or less.

On the other hand, the polyester-based polymer solution may contain unreacted raw materials.

Examples of the petroleum resins include C5-based, C9-based, styrene-based, dichloropentadiene-based and hydrogenated products thereof.

As the binder component (K), a commercially available product may be used, and for example, as the chlorinated paraffin, “Toyoparax C-70/A-50/A-70/A-145/A-150/150 manufactured by Tosoh Corporation” ' and the like, as the polyester polymer, "Tesrac 2474" manufactured by Hitachi Chemical Co., Ltd., and as the petroleum resin, "Qinton 1500" and "Qinton 1700" (all manufactured by Nippon Zeon Co., Ltd.), etc. can be heard

When the coating composition of this invention contains the binder component (K), the content is in solid content of a coating composition, Preferably it is 0.1-10 mass %.

[Epoxy resin (L)]

The coating composition of this invention, especially the lower layer antifouling coating composition (x) may contain the epoxy resin (L).

The epoxy resin (L) is a reaction curable resin that has two or more epoxy groups in one molecule and can be cured by reaction with a curing agent.

In addition, the epoxy resin (L) functions also as a stabilizer by chlorine capture|acquisition, when a vinyl chloride type polymer is contained in the lower layer antifouling-paint composition (x) as a polymer (B1).

As an epoxy resin (L), a bisphenol type, a novolak type, an aliphatic type, etc. are mentioned, From a viewpoint of workability and rust prevention property, Preferably it is a bisphenol type epoxy resin.

As a bisphenol-type epoxy resin, it is preferable that epoxy equivalent is 160-500, and it is more preferable that it is 180-500.

Examples of such bisphenol-type epoxy resins include bisphenol A-type and bisphenol F-type epoxy resins, dimer acid-modified and polysulfide-modified bisphenol-type epoxy resins, and hydrogenated products of these bisphenol-type epoxy resins. Among these, the bisphenol A type epoxy resin is preferable.

Examples of the bisphenol A-type epoxy resin include bisphenol A diglycidyl ether, bisphenol A polypropylene oxide diglycidyl ether, bisphenol A ethylene oxide diglycidyl ether, and hydrogenated bisphenol A diglycidyl ether. and bisphenol A diglycidyl ether such as hydrogenated bisphenol A propylene oxide diglycidyl ether, and the like. and bisphenol F-type diglycidyl ether.

Examples of commercially available bisphenol A-type epoxy resins include "jER 828" manufactured by Mitsubishi Chemical Corporation (epoxy equivalent 184 to 194, viscosity 12,000 to 15,000 mPa·s/25°C, solid content is liquid at room temperature), "jER 834-90X" "(epoxy equivalent 230-270, solid content is semi-solid at room temperature), "jER 1001-75X" (epoxy equivalent 450-500, solid content is solid at room temperature), etc. are mentioned.

These epoxy resins may be used individually by 1 type, and may be used in combination of 2 or more type.

In the present invention, when the lower layer antifouling coating composition (x) contains the epoxy resin (L), the content is, from the viewpoint of improving the antifouling properties, corrosion resistance, curability, and coating film physical properties of the laminated antifouling coating film, the lower layer antifouling coating film In solid content of coating composition (x), 1-60 mass % is preferable, and 3-50 mass % is more preferable.

In this invention, when the antifouling|stain-resistant performance of the lower layer antifouling coating film (X) is required, it is also preferable that the epoxy resin (L) does not contain substantially from a viewpoint of making the antifouling|stain-resistant property favorable.

Although the upper layer antifouling coating composition (y) of this invention may also contain the epoxy resin (L), it is preferable not to contain substantially from the viewpoint of the stain resistance of a coating film, and renewability.

[curing agent for epoxy resin (M)]

The coating composition of the present invention, particularly the lower layer antifouling coating composition (x), may contain a curing agent for an epoxy resin (M), and when the coating composition contains the epoxy resin (L), a curing agent for an epoxy resin (M) It is preferable to contain

When the coating composition contains both the epoxy resin (L) and the curing agent for the epoxy resin (M), the epoxy resin (L) and the curing agent for the epoxy resin (M) are cured and reacted to form a coating film with good physical properties and properties of the substrate Adhesion can be provided.

When the coating composition contains both an epoxy resin (L) and a curing agent for an epoxy resin (M), the coating composition is preferably prepared as a multi-component kit containing them in different components, and immediately before using the coating composition. It is preferable to use after mixing with

Examples of the curing agent (M) for the epoxy resin include an amine curing agent, a mercapto curing agent, and an acid anhydride curing agent, and an amine curing agent having good reactivity at room temperature and easy handling is usually used. Examples of the amine curing agent include bifunctional or higher amines such as aliphatic amines, alicyclic amines, aromatic amines and heterocyclic amines, and modified products thereof.

Examples of the aliphatic amine include diethylenetriamine, dipropylenetriamine, tetraethylenepentamine, bis(cyanoethyl)diethylenetriamine, bishexamethylenetriamine, and m-xylylenediamine (MXDA). can

Examples of the alicyclic amine include 4-cyclohexanediamine, 4,4'-methylenebiscyclohexylamine, norborneindiamine (NBDA/2,5- and 2,6-bis(aminomethyl)-bicyclo[ 2,2,1]heptane), isophoronediamine (IPDA/3-aminomethyl-3,5,5-trimethylcyclohexylamine), and the like.

Examples of the aromatic amine include phenylenediamine, 4,4'-diaminobenzophenone, 4,4'-diaminodiphenyl ether, and 4,4'-diaminodiphenylsulfone.

Examples of the heterocyclic amine include N-methylpiperazine.

Examples of the modified amine include polyamides and modified products of amines as described above, epoxy adducts to which an epoxy compound is added, and Mannich modified products. It is preferable, and a polyamide and its modified product are preferable from the point of corrosion resistance and adhesiveness.

The active hydrogen equivalent of such an amine hardening|curing agent becomes like this from a viewpoint of the balance of sclerosis|hardenability and adhesiveness of a coating composition, Preferably it is 40-1,000 g/eq, More preferably, it is 80-600 g/eq.

Specific examples of the amine-based curing agent include "Lacamide N-153", "Lacamide TD-966" manufactured by DIC Corporation, and "Sunmide 315" manufactured by Sanwa Chemical Industry Co., Ltd. as polyamides. As a modified product of polyamide, “PA-23” manufactured by Otakemeishin Chemical Co., Ltd., which is an epoxy adduct formed by adding an epoxy compound to polyamide, and “A” manufactured by ADEKA, a Mannich modified product of modified polyamide Deca Hardner EH-350" etc. are mentioned.

These hardening|curing agents (M) for epoxy resins may be used individually by 1 type, and may be used in combination of 2 or more type.

When the coating composition contains an epoxy resin (L) and a curing agent for an epoxy resin (M), and an amine curing agent is used as the curing agent for an epoxy resin (M), with respect to the epoxy resin (L), the epoxy component and the amine component The equivalent ratio (epoxy equivalent: active hydrogen equivalent) is preferably 1:0.25 to 1:0.9, more preferably 1:0.3 to 1:0.8. When the curing agent (M) for an epoxy resin is used in such an amount, a coating film excellent in drying properties, corrosion resistance and upper layer compatibility tends to be obtained. In other words, in the present invention, these curing agents for epoxy resins (M) are preferably used in an amount of 10 to 80 parts by mass, more preferably 20 to 70 parts by mass with respect to 100 parts by mass of the epoxy resin in the coating composition. .

Although the upper layer antifouling coating composition (y) of this invention may also contain the hardening|curing agent for epoxy resins (M), it is preferable not to contain substantially from a viewpoint of the stain-resistant property of a coating film.

[Curing accelerator (N) for epoxy resin]

The coating composition of the present invention, particularly the lower layer antifouling coating composition (x), may contain a curing accelerator (N) for an epoxy resin, and the coating composition contains the epoxy resin (L) and a curing agent for an epoxy resin (M) In this case, when the hardening accelerator (N) for epoxy resins is contained, a coating film is preferable at the point which shows favorable sclerosis|hardenability even at low temperature.

Examples of the curing accelerator (N) for epoxy resins include tertiary amine compounds such as tri(dimethylaminomethyl)phenol (TAP), diazabicycloundecene (DBU), and diazabicyclononene (DBN); imidazole compounds such as 2-ethyl-4-methylimidazole; Compounds, such as a phosphine and a phosphonium salt compound, are mentioned, Among them, a tertiary amine compound is preferable from a viewpoint of reaction acceleration|stimulation and availability, and TAP is more preferable.

When the coating composition contains the curing agent for an epoxy resin (M) and a curing accelerator for an epoxy resin (N), the curing accelerator for an epoxy resin (N) is 1 to 10 with respect to 100% by mass of the curing agent for an epoxy resin (M) It is preferable from a viewpoint of sclerosis|hardenability of a coating composition, and coating workability to contain in the quantity used as mass %.

Although the upper layer antifouling coating composition (y) of this invention may also contain the hardening accelerator for epoxy resins (N), it is preferable not to contain substantially from viewpoints, such as antifouling property of a coating film.

(Method for producing the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y))

The lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) of the present invention can each be prepared using the same apparatus, means, etc. as for known general coating materials.

Specifically, in the case of the upper layer antifouling coating composition (y), after preparing the hydrolyzable polymer (A2), a solution of the hydrolyzable polymer (A2), an organic solvent (D2), and, if necessary, other additional components, It can be prepared by adding in batches or sequentially, stirring, and mixing.

(Preferred combination of the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y))

In the present invention, the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) may be in any of the following modes (i) to (viii). In addition, the lower layer antifouling coating composition (x) or the upper layer antifouling coating composition (y), as the hydrolyzable polymer (A), is derived from a hydrolyzable polymer having a structural unit derived from a silyl ester group-containing monomer and a metal ester group-containing monomer. You may contain both hydrolysable polymers which have structural units which are

(i) The underlayer antifouling coating composition (x) does not contain the hydrolyzable polymer (A1).

(ii) the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) contain a hydrolyzable polymer (A), and both the hydrolyzable polymer (A) are derived from a silyl ester group-containing monomer (a11) have a unit

(iii) the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) contain a hydrolyzable polymer (A), and both the hydrolyzable polymer (A) are derived from a metal ester group-containing monomer (a12) have a unit

(iv) the lower layer antifouling coating composition (x) contains a hydrolyzable polymer (A1), the hydrolyzable polymer (A1) has a structural unit derived from a silyl ester group-containing monomer (a11), and an upper layer antifouling coating composition ( The hydrolyzable polymer (A2) contained in y) has a structural unit derived from the metal ester group-containing monomer (a12).

(v) the lower layer antifouling coating composition (x) contains a hydrolyzable polymer (A1), the hydrolyzable polymer (A1) has a structural unit derived from a metal ester group-containing monomer (a12), and an upper layer antifouling coating composition ( The hydrolyzable polymer (A2) contained in y) has a structural unit derived from the silyl ester group-containing monomer (a11).

As for the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y), the aspect described in the following (vi)-(viii) is especially preferable.

(vi) the lower layer antifouling paint composition (x) as the organic antifouling agent (C1), 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonite The hydrolyzable polymer (A2) containing a reel and contained in the upper layer antifouling coating composition (y) has a structural unit derived from the metal ester group-containing monomer (a12).

(vii) the lower layer antifouling paint composition (x) contains 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one as the organic antifouling agent (C1), and the upper layer antifouling paint The hydrolyzable polymer (A2) contained in the composition (y) has a structural unit derived from the metal ester group-containing monomer (a12).

(viii) the lower layer antifouling paint composition (x) contains 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one as the organic antifouling agent (C1), and the upper layer antifouling paint The hydrolyzable polymer (A2) contained in the composition (y) has a structural unit derived from the silyl ester group-containing monomer (a11).

In any of the above aspects, as described above, from the viewpoint of suppressing the appearance defect of the upper antifouling coating film (Y), the upper antifouling coating composition (y) preferably contains substantially no organic antifouling agent (C2), It is more preferable not to contain it.

(Manufacturing method of base material with laminated antifouling coating film)

The manufacturing method of a base material with a laminated antifouling coating film is the process of apply|coating a lower layer antifouling coating composition (x) on a base material, and forming a lower layer antifouling coating film (X), and an upper layer antifouling coating composition on the lower layer antifouling coating film (X) It has the process of apply|coating (y) and forming the upper layer antifouling|stain-resistant coating film (Y).

As the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y), the aforementioned lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) are used.

The method for applying the lower layer antifouling coating composition (x) on the substrate is not particularly limited, and may be applied on the substrate by a known method such as a method using a brush, a roller and a spray.

The applied lower layer antifouling coating composition (x) is dried and/or cured to form a lower layer antifouling coating film (X). The lower layer antifouling coating composition (x) applied by the method described above is dried by, for example, left standing under the conditions of 25°C, preferably for about 1 hour to 14 days, and more preferably for about 1 to 7 days. and/or it can be cured to obtain a lower layer antifouling coating film (X). In addition, in drying and/or hardening of the lower layer antifouling coating composition (x), you may carry out while blowing under heating.

The thickness of the lower layer antifouling coating film (X) is arbitrarily selected according to the anticorrosive performance required for the lower layer antifouling coating film (X), the coating film strength, the period of use, etc., and is preferably about 10 to 1,000 μm. From the viewpoint of easiness of formation and saving of resources, it is more preferably 50 to 400 µm, and still more preferably 70 to 200 µm.

As a method for producing the lower layer antifouling coating film (X) having the above thickness, a method of applying the lower layer antifouling coating composition (x) once to multiple times per application, preferably with a thickness of 10 to 300 µm, is mentioned. can In addition, when the lower layer antifouling coating composition (x) is applied a plurality of times to form the lower layer antifouling coating film (X), two or more substances having different compositions may be laminated as the lower layer antifouling coating composition (x).

In addition, the base material to which the lower layer antifouling coating composition (x) is applied may already have a coating film, such as a primer layer, formed on the surface, and may be subjected to a roughening treatment such as sandblasting treatment. The kind of coating film in direct contact with the coating film X is not specifically limited.

The method for producing a substrate with a laminated antifouling coating film of the present invention includes a step of applying an upper antifouling coating composition (y) on the lower antifouling coating film (X) formed on the substrate to form an upper antifouling coating film (Y) .

The method for applying the upper layer antifouling coating composition (y) is not particularly limited, and it can be applied by the same method as the method for applying the lower layer antifouling coating composition (x) described above, and the applied upper layer antifouling coating composition (y) can form an upper antifouling coating film (Y) by drying. There is no particular limitation on the drying conditions of the upper layer antifouling coating composition (y), but drying under conditions having a period exceeding 0°C from application to use of the upper layer antifouling coating composition (y) is preferable, and in the same manner, 10°C Drying under conditions having a period exceeding the above is more preferable. Under such dry conditions, the laminated antifouling coating film can exhibit favorable appearance, physical properties, and antifouling properties.

Drying of the upper layer antifouling coating composition (y) is, for example, usually performed for 1 hour to 14 days, preferably for about 1 to 7 days, under the condition of an average temperature of 25°C, and heating or blowing is performed during drying. You can do it while doing it.

Prior to application of the upper antifouling coating composition (y), the lower antifouling coating film (X) may undergo pretreatment such as roughening with sandpaper or surface cleaning with high pressure water washing, etc. As long as the requirements of the present invention are satisfied, On the lower antifouling film (X) in a state in which the upper antifouling film (Y) of the laminated antifouling film of the present invention is exhausted and exposed, or on the antifouling film that has been used for a certain period of time for antifouling purposes in the sea, additionally an upper antifouling paint The composition (y) may be applied to form a laminated antifouling coating film.

The thickness of the upper antifouling coating film (Y) is arbitrarily selected depending on the renewal rate of the upper layer antifouling coating film (Y), the period of use, etc. From a viewpoint of easiness, More preferably, it is 60-800 micrometers, More preferably, it is 80-600 micrometers. As a method for producing a coating film of this thickness, the upper layer antifouling coating composition (y) is applied once to multiple times at a thickness of preferably 30 to 500 µm, more preferably 50 to 200 µm per one application. can be heard

The substrate with a laminated antifouling coating film of the present invention is produced by forming the laminated antifouling coating film on the substrate by the method as described above.

The laminated antifouling coating film of the present invention can be used in a wide range of industrial fields, such as ships, fishery, and marine structures, in order to maintain the antifouling property of a base material over a long period of time. Examples of such a base material include ships (large steel ships such as container ships and tankers, fishing boats, FRP ships, wooden ships, hull shells such as yachts, new ships or repair ships, etc.), fishing materials (ropes, fishing nets, fishing gear, and offshore structures such as floats, buoys, and the like) and mega floats. Among these, the base material is preferably selected from the group consisting of ships, underwater structures, and fishing gear, more preferably selected from the group consisting of ships and underwater structures, and still more preferably ships.

[Antifouling method, paint kit for forming a laminated antifouling film, and upper antifouling paint composition]

The antifouling method of the present invention uses the above-described laminated antifouling coating film, and is a method of antifouling by providing the laminated antifouling coating film of the present invention on various substrates.

Moreover, the coating kit for forming a laminated antifouling coating film of the present invention includes at least the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y) described above. On the other hand, the coating kit for forming a laminated antifouling coating film of the present invention is a kit comprising three or more coating compositions in which the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y), plus a coating composition for forming a primer layer, etc. are combined may be

In addition, the upper antifouling coating composition of the present invention is the above-described upper antifouling coating composition (y), and is used for the formation of the upper antifouling coating film (Y) formed on the lower antifouling coating film (X) formed by the lower antifouling coating composition (x). used appropriately.

Example

Hereinafter, the present invention will be described in more detail by way of Examples, but the present invention is not limited by these Examples. Hereinafter, unless it is contrary to the meaning in particular, "part" means a mass part.

In addition, the "solid content" of each component used in an Example points out the component except the volatile component contained in each component as a solvent, It is obtained by drying each component in a 125 degreeC hot air dryer for 1 hour.

[Preparation of hydrolyzable polymer (A)]

<Preparation Example 1: Preparation of hydrolyzable polymer solution (A-1)>

43 parts by mass of xylene, 10 parts by mass of triisopropylsilyl methacrylate, KF-2001 (Shin-Etsu Chemical Co., Ltd.) to a reaction vessel equipped with a stirrer, condenser, thermometer, dropping device, nitrogen inlet tube and heating and cooling jacket 2) 2 mass parts were thrown in, and heating and stirring were performed on the temperature condition of 80±5 degreeC under nitrogen stream. 50 parts by mass of triisopropylsilyl methacrylate, 8 parts by mass of KF-2001 (manufactured by Shin-Etsu Chemical Co., Ltd.), 25 parts by mass of 2-methoxyethyl methacrylate in the reaction vessel from the dropping device while maintaining the same temperature The mixture which consists of mass parts, 5 mass parts of methyl methacrylates, and 2.0 mass parts of 2,2'- azobisisobutyronitrile (AIBN) was dripped over 2 hours. Then, after stirring at the same temperature for 2 hours, 0.4 mass parts of AIBN was further added, the temperature was raised to 105 degreeC over 3 hours, and 24 mass parts of xylene was added, and a colorless and transparent hydrolyzable polymer solution (A-1) ) was obtained.

Table 1 shows the composition of the monomer mixture used, and the characteristic values of the hydrolyzable polymer solution (A-1).

<Production Examples 2 to 4: Preparation of hydrolyzable polymer solutions (A-2) to (A-4)>

Hydrolyzable polymer solution (A-2) to hydrolyzable polymer solution (A-2) to (A-4) was prepared.

Table 1 shows the composition of the monomer mixture used and the characteristic values of the hydrolyzable polymer solutions (A-2) to (A-4) and the polymers contained therein measured by the method described below.

[Table 1]

Each component in Table 1 is as follows.

*1 KF-2001: Shin-Etsu Chemical Co., Ltd., branched-chain mercaptoalkyl-modified organopolysiloxane, functional group equivalent = 1,900 g/mol

*2 FM-0711: JNC Co., Ltd. product, single-end methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn = 1,000

The measuring methods of the viscosity of the obtained polymer solutions (A-1) - (A-4), the number average molecular weight (Mn) of the polymer contained in it, and the weight average molecular weight (Mw) are as follows.

(viscosity of polymer solution)

The viscosity in 25 degreeC of the polymer solution was measured with the E-type viscometer (made by Toki Industrial Co., Ltd.).

(Measurement of number average molecular weight (Mn) and weight average molecular weight (Mw) of polymer)

The number average molecular weight (Mn) and weight average molecular weight (Mw) of the polymer were measured using GPC (gel permeation chromatography) under the following conditions.

GPC conditions

Device: "HLC-8120GPC" (manufactured by Tosoh Corporation)

Column: "SuperH2000+H4000" (manufactured by Tosoh Corporation, 6 mm (inner diameter), 15 cm (length) each)

Eluent: Tetrahydrofuran (THF)

Flow rate: 0.500ml/min

Detector: RI

Column bath temperature: 40°C

Standard Material: Polystyrene

Sample preparation method: After adding a small amount of calcium chloride to the polymer solution prepared in each production example and dehydrating it, the filtrate obtained by filtration with a membrane filter was used as the GPC measurement sample.

<Production Examples 5 to 8: Hydrolyzable polymer solutions (A-5) to (A-8)>

[Production Example M1: Preparation of metal ester group-containing monomer mixture (a12-1)]

85.4 parts of propylene glycol monomethyl ether (PGM) and 40.7 parts of zinc oxide were thrown into the 4-necked flask provided with the cooler, the thermometer, the dropping funnel, and the stirrer, and it heated up at 75 degreeC, stirring. Then, from the dropping funnel, the mixture which consists of 43.1 parts of methacrylic acid, 36.1 parts of acrylic acid, and 5 parts of water was dripped at constant velocity over 3 hours. Furthermore, after stirring for 2 hours, 36 parts of PGM was added, and the transparent metal ester group containing monomer mixture (a12-1) was obtained. Solid content was 44.8 mass %.

[Production Example M2: Preparation of metal ester group-containing monomer mixture (a12-2)]

60 parts of xylene, 13 parts of PGM, and 40.7 parts of zinc oxide were thrown into the 4-necked flask provided with the cooler, the thermometer, the dropping funnel, and the stirrer, and it heated up at 75 degreeC, stirring. Then, from the dropping funnel, 32.3 parts of methacrylic acid, 27 parts of acrylic acid, 37.7 parts of oleic acid, 2.3 parts of acetic acid, and the mixture which consists of 5.8 parts of propionic acid were dripped at constant velocity over 3 hours. Furthermore, after stirring for 2 hours, 77 parts of xylene and 46 parts of PGM were added, and the metal ester group containing monomer mixture (a12-2) was obtained. The solid content was 39.6%.

<Preparation Example 5: Preparation of hydrolyzable polymer solution (A-5)>

15 parts of PGM, 65 parts of xylene, and 4 parts of ethyl acrylate were thrown into the 4-necked flask provided with the cooler, the thermometer, the dropping funnel, and the stirrer, and it heated up at 100 degreeC, stirring. Subsequently, from the dropping funnel, 32.3 parts of methyl methacrylate, 13.9 parts of ethyl acrylate, 40 parts of FM-0711 (trade name, manufactured by JNC Corporation), the metal ester group-containing monomer mixture (a12-1) described in Production Example M1 (a12-1) 21.7 parts, xylene 10 parts, chain transfer agent (manufactured by Nippon Oil Co., Ltd., Nopmer MSD (trade name), α-methylstyrene dimer) 1.2 parts, AIBN 2.5 parts, 2,2'-azobis(2-methyl) The transparent mixture consisting of butyronitrile) (AMBN) 0.8 part was dripped at constant velocity over 6 hours. After completion of the dropping, 0.5 parts of t-butyl peroctoate and 10 parts of xylene were added dropwise over 30 minutes, stirred for an additional 1 hour and 30 minutes, and 10.1 parts of xylene was added thereto, followed by a pale yellow transparent hydrolyzable polymer solution (A-5) got

<Preparation Example 6: Preparation of hydrolyzable polymer solution (A-6)>

15 parts of PGM, 65 parts of xylene, and 4 parts of ethyl acrylate were thrown into the 4-necked flask provided with the cooler, the thermometer, the dropping funnel, and the stirrer, and it heated up at 100 degreeC, stirring. Then, from the dropping funnel, 32.3 parts of methyl methacrylate, 43.9 parts of ethyl acrylate, 10 parts of FM-0721 (trade name, manufactured by JNC Corporation), the metal ester group-containing monomer mixture (a12-1) described in Production Example M1 (a12-1) A transparent mixture consisting of 21.7 parts, 10 parts of xylene, 1.2 parts of a chain transfer agent (manufactured by Nippon Oil Co., Ltd., Nopmer MSD (trade name), α-methylstyrene dimer), 2.5 parts of AIBN, and 3 parts of AMBN was added over 6 hours. It was dripped at constant speed. After completion of the dropwise addition, 0.5 parts of t-butyl peroctoate and 10 parts of xylene were added dropwise over 30 minutes and stirred for an additional 1 hour and 30 minutes, after which 10.1 parts of xylene was added and a pale yellow transparent hydrolyzable polymer solution (A-6) ) was obtained.

<Preparation Example 7: Preparation of hydrolyzable polymer solution (A-7)>

10.0 parts of PGM, 63.0 parts of xylene, and 3.0 parts of ethyl acrylate were put into a reaction vessel equipped with a stirrer, condenser, thermometer, dropping device, nitrogen introduction tube and heating and cooling jacket, and the temperature was raised to 100±5° C. while stirring. 50.3 parts of the metal ester group-containing monomer mixture (a12-2) obtained in Preparation Example M2 (a12-2) obtained in Preparation Example M2 50.3 parts, methyl methacrylate 9.0 parts, ethyl acrylate 58.0 parts, polymerization initiator AMBN 5.0, from the dropping device while maintaining the same temperature. The mixture consisting of parts and 10.0 parts of PGM was added dropwise over 4 hours. After completion of the dropwise addition, 0.5 parts of a polymerization initiator t-butyl peroctoate and 7.0 parts of xylene were added dropwise over 30 minutes, stirred for an additional 1 hour and 30 minutes, 12.0 parts of xylene was added, and a pale yellow transparent hydrolyzable polymer solution (A -7) was prepared.

<Preparation Example 8: Preparation of hydrolyzable polymer solution (A-8)>

15.0 parts of PGM, 60.0 parts of xylene, and 4.0 parts of ethyl acrylate were put into a reaction vessel equipped with a stirrer, a condenser, a thermometer, a dropping device, a nitrogen introduction tube and a heating and cooling jacket, and the temperature was raised to 100±5° C. while stirring. From the dropping device while maintaining the same temperature, in the reaction vessel, 40.2 parts of the metal ester group-containing monomer mixture (a12-1) obtained in Preparation Example M1 above, 15.0 parts of methyl methacrylate, 48.0 parts of ethyl acrylate, and n-butyl acryl The mixture consisting of 15.0 parts of rate, 2.5 parts of polymerization initiator AIBN, 6.5 parts of polymerization initiator AMBN, 1.2 parts of chain transfer agent "Nofmer MSD", and 10.0 parts of xylene was dripped over 6 hours. After completion of the dropwise addition, 0.5 parts of a polymerization initiator t-butyl peroctoate and 7.0 parts of xylene were added dropwise over 30 minutes, and after stirring for an additional 1 hour and 30 minutes, 8.0 parts of xylene was added, and a pale yellow transparent hydrolyzable polymer solution (A -8) was prepared.

Table 2 shows the constitution of the monomer components of the hydrolyzable polymer solutions (A-5) to (A-8) and the characteristic values of the hydrolyzable polymer solutions (A-5) to (A-8). In addition, a viscosity, a number average molecular weight, and a weight average molecular weight are carried out similarly to a hydrolysable polymer solution (A-1), and are measured, and a zinc content (mass %) is an atomic absorption spectrophotometer (made by Shimadzu Corporation, AA6800 (brand name)) ) was measured by

[Table 2]

Each component in Table 2 is as follows.

*2 FM-0711: JNC Co., Ltd. product, single-end methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn = 1,000

*3 FM-0721: JNC Co., Ltd. product, single-end methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight Mn=5,000

[Production of lower layer antifouling coating composition (x), upper layer antifouling coating composition (y), and laminated antifouling coating film]

・Compound ingredients

Table 3 shows each compounding component used for the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y).

[Table 3-1]

[Table 3-2]

On the other hand, all of the organic antifouling agents (C) used are soluble in xylene and propylene glycol monomethyl ether. Its solubility is 1 g/L or more for tralopyrryl for xylene, 100 g/L or more for propylene glycol monomethyl ether, 100 g/L or more for DCOIT, and 1 g/L or more for PK , medetomidine is 1 g/L or more for xylene, and 100 g/L or more for propylene glycol monomethyl ether.

In addition, all used polymers (B) are soluble in the organic-solvent liquid mixture of the ratio described in the Example, and the solubility is 100 g/L or more.

<Preparation of the lower layer antifouling coating composition (x) and the upper layer antifouling coating composition (y)>

By mixing (parts by mass) shown in Tables 4 and 5, each mixing component was mixed and stirred to obtain a lower layer antifouling coating composition (x) and an upper layer antifouling coating composition (y). In addition, the compounding quantity of each component described in Table 4 and Table 5 has shown the compounding quantity as it is. For example, in the topcoat antifouling coating composition (y-1), the amount of the fatty acid amide wax as it is (as a whole) is 2.0 parts by mass and the solid content is 20%. is 0.4 parts by mass.

In addition, a silicone-based paint composition (trade name "CMP Bioclean HB", manufactured by Chugoku Paint Co., Ltd., containing no hydrolyzable polymer (A) and organic antifouling agent (B)) was added to the upper layer antifouling paint composition (y-12) The lower layer antifouling coating composition (x-20) was obtained by mixing 3 parts by mass of tralopyril and 10 parts by mass of 2-heptanone with respect to 100 parts by mass.

[Table 4]

[Table 5]

[Examples 1 to 30 and Comparative Examples 1 to 19]

<Production of laminated antifouling coating film>

To a sandblast-treated steel sheet (length 300 mm × width 100 mm × thickness 3.2 mm), an epoxy resin-based rust-preventing paint composition (trade name "Vanno 500", manufactured by Chugoku Paint Co., Ltd.) was applied so that the dry film thickness was about 100 µm. Subsequently, in the combination shown in Tables 6, 7 and 8, the lower layer antifouling coating composition (x) prepared according to Table 4 is applied once so that the dry film thickness thereof is about 100 μm, and on it, Table 5 The upper layer antifouling coating composition (y) prepared according to the method was applied once so that the dry film thickness was about 200 μm, and then dried under 25°C conditions for 7 days to prepare a test plate with a laminated antifouling coating film. On the other hand, the three coatings are performed at a rate of once per day, that is, in the case of re-applying, the coating composition corresponding to the lower layer is coated, then dried at 25° C. for at least 24 hours, and the coating material corresponding to the upper layer is applied on the coating layer. The composition was painted.

<Evaluation>

〔Exterior〕

When the external appearance of the laminated antifouling coating film obtained in Examples 1-30 and Comparative Examples 1-19 was evaluated visually, there was no problem, such as abnormality of an external appearance, and all were favorable.

[Barnacle immersion test]

The test plates of Examples 1 to 23 and Comparative Examples 1 to 13 prepared as described above were placed at a position of about 0.5 m below the surface of the water in Namba, Miyajima, Hiroshima Prefecture, with the test surface horizontal to the water surface and facing the sea floor. immersed in the viewing direction. After immersion for 3 months, the area (barnacle occupied area) of the portion occupied by barnacles of the laminated antifouling coating film was measured, and the antifouling property (barnacle resistance) of the laminated antifouling coating film was measured according to the following [antifouling property evaluation criteria by barnacle occupied area]. ) was evaluated. The results are shown in Tables 6 and 7.

(Evaluation criteria for antifouling properties based on the area occupied by barnacles)

5: The area occupied by barnacles in the test surface is less than 1% of the total

4: 1% or more but less than 10% of the total area

3: Frostbite area is 10% or more but less than 30% of the total area

2: Frostbite area is 30% or more but less than 70% of the total area

1: More than 70% of the total area of the statue

[Slime resistance adhesion promotion test]

The test plates of Examples 24 to 30 and Comparative Examples 14 to 19 produced as described above were rotated in Hiroshima Bay at a position of about 0.5 meters below the water surface at a speed such that the surface of the test surface was about 15 knots. It mounted on the cylinder and immersed under sunlight exposure conditions. Six months after starting immersion under these conditions, the slime occupied area on the antifouling coating film was measured, and the antifouling property (slime resistance) of the laminated antifouling coating film was evaluated according to the following [antifouling property evaluation standard based on the slime occupied area]. The results are shown in Table 8. Under these conditions, contamination by slimes and vegetative marine organisms is particularly likely to occur due to the characteristics of the submerged sea area and conditions.

(Based on the antifouling property evaluation based on the area occupied by slime)

5: The total area occupied by the slime on the test surface is less than 1% of the total

4: 1% or more but less than 10% of the total area of the statue

3: Frostbite area is 10% or more but less than 30% of the total area

2: Frostbite area is 30% or more but less than 70% of the total area

1: More than 70% of the total area of the statue

[Layer Adhesion]

After immersing the test plate produced as mentioned above in seawater at 50 degreeC for 1 month, the knife cut test was implemented, and the following reference|standard evaluated the interlayer adhesiveness.

(Based on evaluation of interlayer adhesion)

5: In the vicinity of the cut part, delamination is not recognized

4: The range in which delamination occurs is less than 1 mm from the cut

3: The range in which delamination occurs is 1 mm or more and less than 3 mm from the cut

2: The range in which delamination occurs is 3 mm or more and less than 10 mm from the cut

1: The range in which delamination occurs is 10 mm or more from the cut

Tables 6 to 8 show the results.

[Table 6]

[Table 7]

[Table 8]

As is clear from the results of Examples and Comparative Examples, according to the present invention, it is possible to provide a laminated antifouling coating film that has a good appearance and can further exhibit antifouling performance and interlayer adhesion, and a substrate with a laminated antifouling coating film having the same on the substrate. .

Claims (18)

A laminated antifouling coating film in which a lower antifouling coating film (X) and an upper antifouling coating film (Y) are laminated, the antifouling coating film comprising:
The lower layer antifouling coating film (X) contains a polymer (B1) and an organic antifouling agent (C1),
The polymer (B1) is selected from the group consisting of (i) a polymer comprising structural units derived from vinyl chloride, and (ii) a homopolymer or copolymer of (meth)acrylic acid and/or (meth)acrylic acid ester. more than a species,
The organic antifouling agent (C1) is 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile, 4,5-dichloro-2-n - at least one selected from octyl-4-isothiazolin-3-one and (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole,
The upper layer antifouling film (Y) contains a hydrolyzable polymer (A2),
The hydrolyzable polymer (A2) has a structural unit derived from a silyl ester group-containing monomer (a11) or a structural unit derived from a metal ester group-containing monomer (a12);
Laminated antifouling film. The method of claim 1,
The said underlayer antifouling coating film (X) further contains a hydrolysable polymer (A1). The method of claim 1,
The amount of the polymer (B1) in the lower layer antifouling coating film (X) is 1-90 mass %. delete The method of claim 1,
The laminated antifouling coating film, wherein the silyl ester group-containing monomer (a11) is represented by the following formula (1-1).

(In formula (1-1), R ¹¹ represents a hydrogen atom or a methyl group, and R ¹² , R ¹³ and R ¹⁴ each independently represent a monovalent hydrocarbon group.) delete The method of claim 1,
The metal ester group-containing monomer (a12) contains at least one of a monomer (a121) represented by the following formula (1-2) and a monomer (a122) represented by the following formula (1-3), Laminated antifouling coating film .

(In formula (1-2), R ²¹ each independently represents a monovalent group containing a terminal ethylenically unsaturated group, and M represents a metal.)

(In formula (1-3), R ³¹ represents a monovalent group containing a terminal ethylenically unsaturated group, R ³² represents a monovalent organic group having 1 to 30 carbon atoms not containing a terminal ethylenically unsaturated group, and M represents a metal indicate.) delete A base material with a laminated antifouling film coated with the laminated antifouling film according to any one of claims 1 to 3, 5 and 7. 10. The method of claim 9,
A substrate with a laminated antifouling film, wherein the substrate is an underwater structure, a ship, or a fishing gear. An antifouling method using the laminated antifouling coating film according to any one of claims 1 to 3, 5 and 7. A step of applying a lower layer antifouling coating composition (x) on a substrate to form a lower layer antifouling coating film (X), and
a step of applying an upper antifouling coating composition (y) on the lower antifouling coating film (X) to form an upper antifouling coating film (Y);
The lower layer antifouling paint composition (x) contains a polymer (B1) and an organic antifouling agent (C1),
The polymer (B1) is selected from the group consisting of (i) a polymer comprising structural units derived from vinyl chloride, and (ii) a homopolymer or copolymer of (meth)acrylic acid and/or (meth)acrylic acid ester. more than a species,
The organic antifouling agent (C1) is 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile, 4,5-dichloro-2-n - at least one selected from octyl-4-isothiazolin-3-one and (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole,
The upper antifouling coating composition (y) contains a hydrolyzable polymer (A2) and an organic solvent (D2),
The hydrolyzable polymer (A2) has a structural unit derived from a silyl ester group-containing monomer (a11) or a structural unit derived from a metal ester group-containing monomer (a12);
A method for manufacturing a substrate with a laminated antifouling coating film. 13. The method of claim 12,
The polymer (B1) and the organic antifouling agent (C1) contained in the said lower layer antifouling coating composition (x) are soluble in the said organic solvent (D2), The manufacturing method of the base material with a laminated antifouling film. 13. The method of claim 12,
The organic solvent (D2) contains at least one selected from the group consisting of a hydrocarbon solvent, an alcohol solvent, a ketone solvent, and an ester solvent. 13. The method of claim 12,
The upper layer antifouling coating composition (y) contains the organic antifouling agent (C2), and the content (mass %) of the organic antifouling agent (C2) in the upper layer antifouling coating composition (y) is the organic antifouling agent in the lower layer antifouling coating composition (x) A method for producing a base material with a laminated antifouling coating film, which is lower than the content (mass %) of the agent (C1). 16. The method according to any one of claims 12 to 15,
The method for producing a substrate with a laminated antifouling coating film, wherein the concentration of the organic antifouling agent (C2) in the solid content of the upper layer antifouling coating composition (y) is less than 0.1% by mass. A lower layer antifouling paint composition (x) comprising a polymer (B1) and an organic antifouling agent (C1), and
A paint kit for forming a laminated antifouling film comprising an upper layer antifouling paint composition (y) containing a hydrolyzable polymer (A2) and an organic solvent (D2), the paint kit comprising:
The polymer (B1) is selected from the group consisting of (i) a polymer comprising structural units derived from vinyl chloride, and (ii) a homopolymer or copolymer of (meth)acrylic acid and/or (meth)acrylic acid ester. more than a species,
The organic antifouling agent (C1) is 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile, 4,5-dichloro-2-n - at least one selected from octyl-4-isothiazolin-3-one and (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole,
The hydrolyzable polymer (A2) has a structural unit derived from a silyl ester group-containing monomer (a11) or a structural unit derived from a metal ester group-containing monomer (a12);
The polymer (B1) and the organic antifouling agent (C1) contained in the lower layer antifouling coating composition (x) are soluble in the organic solvent (D2),
A paint kit for forming a laminated antifouling film. An upper antifouling coating composition coated on the surface of a lower antifouling coating film (X) containing a polymer (B1) and an organic antifouling agent (C1),
The polymer (B1) is selected from the group consisting of (i) a polymer comprising structural units derived from vinyl chloride, and (ii) a homopolymer or copolymer of (meth)acrylic acid and/or (meth)acrylic acid ester. more than a species,
The organic antifouling agent (C1) is 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile, 4,5-dichloro-2-n - at least one selected from octyl-4-isothiazolin-3-one and (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole,
The upper layer antifouling paint composition contains a hydrolyzable polymer (A2) and an organic solvent (D2),
The hydrolyzable polymer (A2) has a structural unit derived from a silyl ester group-containing monomer (a11) or a structural unit derived from a metal ester group-containing monomer (a12);
The polymer (B1) and the organic antifouling agent (C1) contained in the lower layer antifouling coating film (X) are soluble in the organic solvent (D2),
The upper layer antifouling paint composition.