WO2021182454A1 - 防汚塗料組成物 - Google Patents
防汚塗料組成物 Download PDFInfo
- Publication number
- WO2021182454A1 WO2021182454A1 PCT/JP2021/009227 JP2021009227W WO2021182454A1 WO 2021182454 A1 WO2021182454 A1 WO 2021182454A1 JP 2021009227 W JP2021009227 W JP 2021009227W WO 2021182454 A1 WO2021182454 A1 WO 2021182454A1
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- WIPO (PCT)
- Prior art keywords
- coating film
- mass
- antifouling coating
- antifouling
- parts
- Prior art date
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- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
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- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- ADLSSRLDGACTEX-UHFFFAOYSA-N tetraphenyl silicate Chemical compound C=1C=CC=CC=1O[Si](OC=1C=CC=CC=1)(OC=1C=CC=CC=1)OC1=CC=CC=C1 ADLSSRLDGACTEX-UHFFFAOYSA-N 0.000 description 1
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- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
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- FRIFWDMNNFCCKC-UHFFFAOYSA-L zinc 2-methylprop-2-enoate prop-2-enoate Chemical compound [Zn++].[O-]C(=O)C=C.CC(=C)C([O-])=O FRIFWDMNNFCCKC-UHFFFAOYSA-L 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1675—Polyorganosiloxane-containing compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
- C09D5/1612—Non-macromolecular compounds
- C09D5/1618—Non-macromolecular compounds inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
- C09D5/1637—Macromolecular compounds
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
Definitions
- One embodiment of the present invention includes an antifouling coating composition, an antifouling coating film, a base material with an antifouling coating film or a method for producing the same, an antifouling method for the base material, or a method for repairing a base material with an antifouling coating film.
- an antifouling coating film containing a hydrolyzable polymer on the surface of the base material is widely used.
- the surface of the antifouling coating film becomes hydrophilic as the hydrolysis of the polymer progresses in water (seawater), and the hydrolyzed portion becomes hydrophilic due to water flow or the like. Demonstrates antifouling property by being consumed (renewing the antifouling coating film).
- Patent Document 1 describes an antifouling coating composition containing a polyorganosiloxane block-containing hydrolyzable copolymer and medetomidine. Is disclosed.
- the antifouling coating composition containing the hydrolyzable polymer containing the conventional silicone component described in Patent Document 1 and the like has a high degree of consumption of the antifouling coating film obtained from the coating composition.
- the antifouling coating film having a high degree of wear is excellent in antifouling property, there is room for improvement in this respect because a thick film is required to exhibit the antifouling property for a long period of time.
- the antifouling coating film obtained from the conventional antifouling coating composition containing a hydrolyzable polymer containing a silicone component does not have sufficient resistance to damage to a base material such as a ship.
- a base material used in contact with water (seawater) of a ship or the like is pulled up to land (eg, a dock) after the useful life of the antifouling coating film coated on the surface in contact with the water has expired. Is being repaired. In this repair, the antifouling coating film is repainted, but in addition to the antifouling coating film, the anticorrosion coating film and intermediate coating film normally formed under the antifouling coating film may be damaged. Damaged anticorrosion coatings and intermediate coatings are also being repaired. In this way, when repairing an anticorrosion coating film or an intermediate coating film, a paint such as an anticorrosion coating film or an intermediate coating film is applied to the base material, but in many cases, the useful life has expired. The paint may adhere to the antifouling paint film (old paint film).
- an antifouling coating film formed from a conventional antifouling coating composition using a hydrolyzable polymer containing a silicone component can be formed on the anticorrosion coating film. It was found that the adhesion to the coating film such as the coating film and the intermediate coating film was not sufficient. Therefore, conventionally, it has been necessary to remove the antifouling coating film around the coating film such as the damaged anticorrosion coating film and the intermediate coating film at the time of the repair by surface treatment or the like. There was room for improvement in terms of economics and economics.
- an antifouling coating film having excellent damage resistance and an appropriate degree of coating film consumption can be formed, and the antifouling coating film (including a coating film in which the antifouling coating film has deteriorated) can be formed.
- an antifouling coating composition capable of forming an antifouling coating film having excellent adhesion to a coating film such as an anticorrosion coating film or an intermediate coating film (hereinafter, also referred to as "repairability").
- a configuration example of the present invention is as follows.
- a hydrolyzable copolymer (A) containing an organosiloxane block and a metal ester group and zinc oxide (B) are contained.
- the copolymer (A) The structural unit derived from the metal ester group-containing monomer (a1) is 5 to 25% by mass.
- the structural unit derived from the organosiloxane block-containing monomer (a2) represented by the following formula (2) is 5 to 15% by mass, and It contains a structural unit derived from the monomer (a3) represented by the following formula (3).
- the content of zinc oxide (B) is 70 to 200 parts by mass with respect to 100 parts by mass of the copolymer (A). Antifouling paint composition.
- R 1 , R 2 and R 3 each independently represent a monovalent hydrocarbon group, and X independently represents a (meth) acryloyloxyalkyl group or a mercaptoalkyl group, m. Is 1 or more, n is 0 or more, p and q are independently 0 or 1, and n + p + q is 1 or more.
- R 41 represents a monovalent group containing an ethylenically unsaturated group
- R 42 represents a monovalent hydrocarbon group having 3 to 6 carbon atoms not containing an ethylenically unsaturated group. .. ]
- the monomer (a1) is selected from the monomer (a11) represented by the following formula (1-1) and the monomer (a12) represented by the following formula (1-2).
- the antifouling coating composition according to ⁇ 1> which comprises at least one monomer.
- R 21 independently represents a monovalent group containing a terminal ethylenically unsaturated group, and M represents a metal atom.
- R 31 represents a monovalent group containing a terminal ethylenically unsaturated group
- R 32 is a monovalent group having 1 to 30 carbon atoms not containing a terminal ethylenically unsaturated group
- M represents a metal atom.
- ⁇ 4> The antifouling coating composition according to any one of ⁇ 1> to ⁇ 3>, wherein the copolymer (A) has a weight average molecular weight of 3,000 to 5,000.
- ⁇ 5> The antifouling coating composition according to any one of ⁇ 1> to ⁇ 4>, wherein the solvent-soluble component acid value is 30 to 95 mgKOH / g.
- ⁇ 6> An antifouling coating film formed from the antifouling coating composition according to any one of ⁇ 1> to ⁇ 5>.
- ⁇ 7> A base material with an antifouling coating film having the base material and the antifouling coating film according to ⁇ 6>.
- ⁇ 8> A method for producing a base material with an antifouling coating film, which comprises a step of providing the antifouling coating composition according to any one of ⁇ 1> to ⁇ 5> on at least a part of the base material and then drying the base material.
- An antifouling method for a base material which comprises the step of forming the antifouling coating film according to ⁇ 6> on at least a part of the base material.
- a method for repairing a base material with an antifouling coating film which comprises a step of applying a repair paint to the base material with an antifouling coating film according to ⁇ 10> and ⁇ 7>.
- an antifouling coating film having excellent damage resistance, an appropriate degree of coating film wear, and excellent repairability it is possible to form an antifouling coating film having excellent damage resistance, an appropriate degree of coating film wear, and excellent repairability. Further, according to one embodiment of the present invention, it is excellent in a good balance between repairability and damage resistance, and is sufficient even though it has an appropriate degree of coating film wear, particularly slower than the conventional one. A coating film having antifouling property can be formed. Therefore, according to one embodiment of the present invention, it is possible to form an antifouling coating film having excellent damage resistance and sufficient antifouling property for a long period of time. The period can be extended.
- the antifouling coating composition according to one embodiment of the present invention is a hydrolyzable copolymer (A) containing an organosiloxane block and a metal ester group (hereinafter, simply “co-”. It also contains "polymer (A)") and zinc oxide (B).
- the copolymer (A) The structural unit derived from the metal ester group-containing monomer (a1) is 5 to 25% by mass.
- the structural unit derived from the organosiloxane block-containing monomer (a2) represented by the following formula (2) is 5 to 15% by mass, and It contains a structural unit derived from the monomer (a3) represented by the following formula (3).
- composition in which the content of zinc oxide (B) is 70 to 200 parts by mass with respect to the content of 100 parts by mass of the copolymer (A). Since this composition contains a specific copolymer (A) and the content of zinc oxide (B) is within the above range, it has an excellent antifouling balance with an appropriate degree of coating film wear and repairability. A coating film can be formed.
- the copolymer (A) is a hydrolyzable copolymer containing an organosiloxane block and a metal ester group.
- the structural unit derived from the metal ester group-containing monomer (a1) is 5 to 25% by mass.
- the structural unit derived from the organosiloxane block-containing monomer (a2) represented by the following formula (2) is 5 to 15% by mass, and It has a structural unit derived from the monomer (a3) represented by the following formula (3).
- the "copolymer having a structural unit derived from A” means a copolymer in which A is introduced by a polymerization reaction or chain transfer. Therefore, for example, when the monomer (a2) has a mercapto group, H of —SH may be extracted, and the generated —S ⁇ (S radical) may be polymerized to synthesize a copolymer. However, even in such a case, the copolymer (A) is said to have a structural unit derived from the monomer (a2).
- the number average molecular weight (Mn) and weight average molecular weight (Mw) of the copolymer (A) are the viscosity and storage stability of the obtained antifouling coating composition, and the degree of coating film consumption (elution rate) of the obtained antifouling coating film. , Updateability) and the like, and it is preferable to make appropriate adjustments.
- Mn of the copolymer (A) an antifouling coating composition having a low viscosity and excellent storage stability can be easily obtained, and an antifouling coating film having an appropriate degree of coating film consumption can be easily obtained.
- the amount is preferably 1,000 or more, more preferably 1,500 or more, preferably 5,000 or less, more preferably 5,000 or less. It is 3,000 or less.
- the Mw of the copolymer (A) is preferably 2,000 or more, more preferably 3,000 or more, preferably 10,000 or less, more preferably 6,000 or less, particularly. It is preferably 5,000 or less.
- the Mn and Mw can be determined by measuring by gel permeation chromatography and converting with standard polystyrene, and specifically, can be determined by the method described in the following Examples.
- an antifouling coating composition having excellent coating workability can be easily obtained, and an antifouling coating having sufficient antifouling properties can be easily obtained. It is preferably 10% by mass or more, more preferably 15% by mass or more, preferably 50% by mass or less, more preferably 40% by mass or less, and further preferably 30% by mass or less. Further, with respect to 100% by mass of the solid content of the present composition, it is preferably 15% by mass or more, more preferably 20% by mass or more, preferably 50% by mass or less, and more preferably 40% by mass or less.
- the present composition contains two or more kinds of copolymers (A), the content is in a preferable range as the total content of two or more kinds of copolymers (A), and each component described later Is the same.
- the copolymer (A) has a structural unit derived from the metal ester group-containing monomer (a1) (hereinafter, also referred to as “constituent unit (i)”).
- the structural unit (i) contained in the copolymer (A) may be one type or two or more types.
- an antifouling coating film having sufficient antifouling property can be easily obtained, and further, the present composition having excellent coating workability can be easily obtained. From the viewpoint of being able to be obtained, it is 5% by mass or more, preferably 7% by mass or more, more preferably 9% by mass or more, and 25% by mass, based on 100% by mass of all the constituent units of the copolymer (A). Hereinafter, it is preferably 20% by mass or less, more preferably 17% by mass or less. In the present invention, all the structural units of the copolymer (A) do not include the structural units derived from the polymerization initiator and the chain transfer agent.
- the content of each structural unit in the copolymer (A) can be measured by nuclear magnetic resonance spectroscopy (NMR), gas chromatograph mass spectrometry (GC-MS), etc., and the copolymer (A) It can also be calculated from the amount of each monomer used in synthesizing.
- the monomer (a1) has sufficient antifouling properties, and an antifouling coating film having excellent water resistance can be easily obtained. Therefore, the monomer (a1) is simply represented by the following formula (1-1). It preferably contains at least one monomer selected from the dimer (a11) and the monomer (a12) represented by the following formula (1-2), and may contain the monomer (a11). More preferably, the content of the monomer (a11) is 50% by mass or more.
- R 21 independently represents a monovalent group containing a terminal ethylenically unsaturated group, and M represents a metal atom.
- the metal atom in M is a divalent metal atom, and examples thereof include magnesium, calcium, neodymium, titanium, zirconium, iron, ruthenium, cobalt, nickel, copper, zinc and aluminum atoms.
- metal atoms of Groups 10 to 12 such as nickel, copper and zinc are preferable, copper and zinc atoms are more preferable, and zinc atoms are even more preferable.
- R 21 may have an ethylenically unsaturated group at the terminal and may have an ethylenically unsaturated group other than the terminal, but it may have an ethylenically unsaturated group only at the terminal. More preferred.
- R 21 is preferably an unsaturated organic group containing a terminal ethylenically unsaturated group, and the unsaturated organic group is an unsaturated aliphatic hydrocarbon group or one of the unsaturated aliphatic hydrocarbon groups. Examples thereof include a group in which the moiety is substituted with an ester bond, an amide bond, an ether bond, or the like.
- R 21 examples include acrylic acid (2-propenic acid), methacrylic acid (2-methyl-2-propenic acid), 3-butenoic acid, 4-pentenoic acid, 10-undecenoic acid, and (meth) acryloyloxy.
- Carboxylic acids from aliphatic unsaturated monocarboxylic acids containing terminal ethylenically unsaturated groups such as alkylcarboxylic acids [eg 3- (meth) acryloyloxypropionic acid, 3- (meth) acryloyloxy-2-methylpropionic acid]
- alkylcarboxylic acids eg 3- (meth) acryloyloxypropionic acid, 3- (meth) acryloyloxy-2-methylpropionic acid
- Examples thereof include a group excluding a group and a group obtained by removing one carboxy group from an aliphatic unsaturated dicarboxylic acid containing a terminal ethylenically unsaturated group such as itaconic acid.
- 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 is preferably acrylic acid, methacrylic acid, or (meth) acryloyloxyalkyl.
- a group obtained by removing a carboxy group from a carboxylic acid is more preferable, and a group obtained by removing a carboxy group from acrylic acid or methacrylic acid is further preferable.
- the monomer (a11) is preferably a monomer (a11') represented by the following formula (1-1').
- R 22 independently represents a hydrogen atom or a methyl group, and M represents a copper or zinc atom.
- Examples of the monomer (a11) include zinc diacrylate, zinc dimethacrylate, zinc methacrylate acrylate, zinc di (3-acryloyloxypropionic acid), zinc di (3-methacryloyloxypropionic acid), and di (di (3-acryloyloxypropionic acid).
- Zinc diacrylate, zinc dimethacrylate, zinc acrylate preferably.
- R 31 represents a monovalent group containing a terminal ethylenically unsaturated group
- R 32 is a monovalent group having 1 to 30 carbon atoms not containing a terminal ethylenically unsaturated group
- M represents a metal atom.
- R 31 and M in the formula (1-2) the same groups (atoms) as R 21 and M in the formula (1-1) are exemplified, and the preferred groups (atoms) are also the same.
- R 32 examples include a aliphatic hydrocarbon group having 1 to 30 carbon atoms, an alicyclic hydrocarbon group having 3 to 30 carbon atoms, and an aromatic group having 6 to 30 carbon atoms, which do not contain a terminal ethylenically unsaturated group.
- examples include organic groups such as hydrocarbon groups. These groups may have substituents. Examples of the substituent include a hydroxyl group.
- the aliphatic hydrocarbon group may be linear or branched, and may be a saturated aliphatic hydrocarbon group or an unsaturated aliphatic hydrocarbon group.
- R 32 is an unsaturated aliphatic hydrocarbon group, R 32 does not contain a terminal ethylenically unsaturated group.
- the aliphatic hydrocarbon group has 1 to 30, preferably 1 to 28, more preferably 1 to 26, and even more preferably 1 to 24 carbon atoms.
- the aliphatic hydrocarbon group may be 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 alicyclic hydrocarbon group has 3 or more carbon atoms, preferably 4 or more, more preferably 5 or more, still more preferably 6 or more, and 30 or less, preferably 20 or less, more preferably 16 or less, still more preferable. Is 12 or less.
- the alicyclic hydrocarbon group may be substituted with an aliphatic hydrocarbon group or an aromatic hydrocarbon group.
- the aromatic hydrocarbon group has 6 to 30, preferably 6 to 24, more preferably 6 to 18, and even more preferably 6 to 10 carbon atoms.
- the aromatic hydrocarbon group may be substituted with an aliphatic hydrocarbon group or an alicyclic hydrocarbon group.
- R 32 is preferably an organic acid residue derived from a monobasic acid, and specific examples thereof include versatic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, avietic acid, and neo. Included are organic acids selected from the group consisting of abietinic acid, pimalic acid, dehydroavietic acid, 12-hydroxystearic acid and naphthenic acid minus the carboxy group. Among these, a group obtained by removing a carboxy group from abietic acid, versatic acid, and naphthenic acid is preferable, and a group obtained by removing a carboxy group from abietic acid and versatic acid is more preferable.
- the monomer (a12) is preferably a monomer (a12') represented by the following formula (1-2').
- R 33 represents a hydrogen atom or a methyl group
- R 34 is synonymous with R 32 in formula (1-2)
- M represents a copper or zinc atom.
- Examples of the monomer (a12) include rosatic zinc 3- (meth) acryloyloxypropionate, zinc versatic acid 3- (meth) acryloyloxypropionate, rosatic zinc (meth) acrylate, and versatic (meth) acrylate.
- Zinc acid, zinc (meth) naphthenate acrylate, rosic copper 3- (meth) acryloyloxypropionate, copper versaticate 3- (meth) acryloyloxypropionate, rosatic copper (meth) acrylate, (meth) acrylic acid Includes copper versaticate and copper naphthenate (meth) acrylate.
- the structural unit is obtained by polymerizing only the terminal ethylenically unsaturated group in the monomer (a12). It is preferably a structural unit.
- the copolymer (A) has a structural unit derived from the organosiloxane block-containing monomer (a2) represented by the following formula (2) (hereinafter, also referred to as “constituent unit (ii)”).
- the structural unit (ii) contained in the copolymer (A) may be one type or two or more types.
- the content of the structural unit (ii) in the copolymer (A) is such that an antifouling coating film having sufficient antifouling property and excellent repairability can be easily obtained. It is 5% by mass or more, preferably 8% by mass or more, and 15% by mass or less, preferably 12% by mass or less, based on 100% by mass of all the constituent units of (A).
- R 1 , R 2 and R 3 each independently represent a monovalent hydrocarbon group, and X independently represents a (meth) acryloyloxyalkyl group or a mercaptoalkyl group, m. Is 1 or more, n is 0 or more, p and q are independently 0 or 1, and n + p + q is 1 or more.
- Hydrocarbon groups in R 1 , R 2 and R 3 include, for example, linear, branched or cyclic alkyl groups and aryl groups.
- the alkyl group preferably has 1 to 12, more preferably 1 to 8, and even more preferably 1 to 4.
- the aryl group preferably has 6 to 14 carbon atoms, more preferably 6 to 10 carbon atoms.
- R 1 , R 2 and R 3 are each independently preferably an alkyl group such as a methyl group or a butyl group.
- X is preferably a (meth) acryloyloxyalkyl group from the viewpoint of uniform polymerization progress, and is preferably a mercaptoalkyl group from the viewpoint of reducing the viscosity of the copolymer (A) and facilitating handling.
- Examples of X include (meth) acryloyloxyethyl group, (meth) acryloyloxypropyl group, (meth) acryloyloxybutyl group, mercaptomethyl group, mercaptoethyl group, mercaptopropyl group, and mercaptobutyl group.
- m and n mean the average number of moles added of (SiR 2 2 O) and (SiXR 3 O), respectively.
- m + n is preferably 2 or more. That is, the organosiloxane block-containing monomer (a2) is preferably a polyorganosiloxane block-containing monomer (a2).
- the repeating units may be repeated in any order of random, alternating, or block. Show good. That is, for example, in the case of the formula- [Y 3- Z 3 ]-(where Y and Z indicate repeating units), the random shape such as -YYZZYZZ- or the alternating shape such as -YZZYZZ- may be used. It may be in the form of a block such as ⁇ YYZZZ ⁇ or ⁇ ZZZZYY ⁇ .
- One form of the copolymer (A) has a structural unit derived from the monomer (a21) in the formula (2), in which n is 0, p is 1, and q is 0. Is preferable.
- An antifouling coating composition containing a copolymer (A) having a structural unit derived from such a monomer (a21) is preferable in that an antifouling coating film having better antifouling properties can be formed.
- the m in such a monomer (a21) is preferably 3 or more, more preferably 5 or more, preferably 200 or less, and more preferably 70 or less from the viewpoint of easiness of polymerization and the like.
- the monomer (a21) a commercially available product can be used.
- the commercially available products include FM-0711 (one-terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight: 1,000) and FM-0721 (one-ended methacryloyloxyalkyl-modified organopoly) manufactured by JNC Co., Ltd. Siloxane, number average molecular weight: 5,000), FM-0725 (one-ended methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight: 10,000), X-22-174ASX (piece) manufactured by Shin-Etsu Chemical Industry Co., Ltd.
- the copolymer (A) may have a structural unit derived from the monomer (a22) in which n is 0 and p and q are 1 in the formula (2). preferable.
- An antifouling coating composition containing a copolymer (A) having a structural unit derived from such a monomer (a22) is preferable because an antifouling coating film having excellent repairability tends to be easily formed. ..
- m in such a monomer (a22) is preferably 3 or more, more preferably 5 or more, preferably 200 or less, and more preferably 70 or less.
- the monomer (a22) a commercially available product can be used.
- the commercially available products include FM-7711 (both-terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight: 1,000) and FM-7721 (both-terminal methacryloyloxyalkyl-modified organopoly) manufactured by JNC Co., Ltd. Siloxane, number average molecular weight: 5,000), FM-7725 (both-terminal methacryloyloxyalkyl-modified organopolysiloxane, number average molecular weight: 10,000), X-22-164 (both) manufactured by Shin-Etsu Chemical Industry Co., Ltd.
- the copolymer (A) it is also preferable to have a structural unit derived from the monomer (a23) in which n is 1 or more in the formula (2). It is preferable that the copolymer (A) has a structural unit derived from such a monomer (a23) because it has a low viscosity and is easy to handle. In such a monomer (a23), m is preferably 50 to 1,000, and n is preferably 1 to 30.
- the monomer (a23) As the monomer (a23), a commercially available product can be used.
- the commercially available products include KF-2001 (side chain mercaptoalkyl-modified organopolysiloxane, functional group equivalent: 1,900 g / mol) and KF-2004 (side chain mercaptoalkyl-modified) manufactured by Shin-Etsu Chemical Industry Co., Ltd.
- the copolymer (A) is also referred to as a structural unit derived from the monomer (a3) represented by the following formula (3) (hereinafter, “constituent unit (iii)”). ).
- the structural unit (iii) contained in the copolymer (A) may be one type or two or more types. Since the copolymer (A) contains the constituent unit (iii), an antifouling coating film having excellent repairability can be easily obtained, and the coating film is not significantly impaired in the antifouling property of the obtained antifouling coating film. The degree of wear can be suppressed to an appropriate update speed. Therefore, an antifouling coating film having sufficient antifouling properties for a long period of time can be easily obtained.
- the content of the structural unit (iii) in the copolymer (A) is such that an antifouling coating film having sufficient antifouling property and excellent repairability can be easily obtained.
- 100% by mass of all the constituent units of (A) it is preferably 3% by mass or more, more preferably 5% by mass or more, preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably. It is 25% by mass or less.
- R 41 represents a monovalent group containing an ethylenically unsaturated group
- R 42 represents a monovalent hydrocarbon group having 3 to 6 carbon atoms not containing an ethylenically unsaturated group. .. ]
- the monomer (a3) include n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, and pentyl (). Examples thereof include meta) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, and phenyl (meth) acrylate.
- the monomer (a3) preferably contains a monomer in which R 42 is an aliphatic hydrocarbon group, and a monomer having a butyl group, specifically, n-butyl (meth) acrylate or isobutyl. It preferably contains (meth) acrylate and tert-butyl (meth) acrylate, more preferably contains n-butyl (meth) acrylate, and particularly preferably contains n-butyl acrylate.
- the present composition having a low coating viscosity and excellent coating workability can be easily obtained, and the degree of coating film wear is appropriately updated without significantly impairing the antifouling property.
- An antifouling coating film that can be suppressed in speed and has excellent damage resistance can be easily obtained.
- the content thereof is preferably 10 parts by mass or more, more preferably 20 parts by mass with respect to 100 parts by mass of the monomer (a3). It is more than a part.
- the monomer (a3) preferably contains cyclohexyl (meth) acrylate, and more preferably contains cyclohexyl methacrylate.
- a monomer (a3) it is possible to easily obtain an antifouling coating film having a low degree of wear on the coating film and good antifouling property, and the coating viscosity is particularly low, so that the coating work can be performed.
- the present composition having excellent properties can be easily obtained.
- the monomer (a3) contains two or more kinds of monomers, it is preferable to contain a monomer in which R 42 is a butyl group and cyclohexyl (meth) acrylate.
- R 42 is a butyl group and cyclohexyl (meth) acrylate.
- R 42 can alleviate the tendency for polar groups and non-polar groups to be present in the formed antifouling coating film, resulting in a discontinuous and non-uniform state. Is considered to be.
- the copolymer (A) is optionally a structural unit derived from other monomers (a4) other than the monomers (a1) to (a3) (hereinafter, also referred to as “constituent unit (iv)”). May have, and it is preferable to have the structural unit (iv).
- the structural unit (iv) contained in the copolymer (A) may be one type or two or more types.
- the content of the constituent unit (iv) in the copolymer (A) has sufficient antifouling property and is excellent in repairability.
- the amount is preferably 50% by mass or more, more preferably 53% by mass or more, and preferably 80% by mass with respect to 100% by mass of all the constituent units of the copolymer (A). % Or less, more preferably 75% by mass or less.
- a monomer copolymerizable with the monomers (a1) to (a3) can be used without limitation, but an ethylenically unsaturated compound is preferable. More preferably, it is a meta) acrylate.
- R 42 is a monomer (a41) which is a hydrocarbon group having 1 or 2 carbon atoms, and R 42 has an ether bond and has 2 to 20 carbon atoms. It is preferable to contain the monomer (a42) which is an organic group of the above, and it is more preferable to contain the monomer (a41).
- the copolymer (A) has a structural unit derived from such a monomer (a41) or (a42), it has good antifouling property and is excellent in damage resistance and crack resistance. A coating film can be easily obtained, and the composition can be easily adjusted to a viscosity excellent in coating workability.
- the monomer (a41) examples include methyl (meth) acrylate and ethyl (meth) acrylate, and an antifouling coating film having excellent stain resistance, damage resistance, and crack resistance can be easily obtained.
- Methyl methacrylate or ethyl acrylate is preferable from the viewpoint of the ability to obtain the monomer, the availability and safety of the monomer, and the ease of polymerization of the polymer.
- the copolymer (A) contains a structural unit derived from the monomer (a41), it is preferable to have a structural unit derived from two or more kinds of monomers (a41), and it has damage resistance and crack resistance. It is preferable to contain a structural unit derived from methyl methacrylate and ethyl acrylate from the viewpoint that an excellent antifouling coating film can be easily obtained and the polymer can be easily polymerized.
- the content of the structural unit derived from ethyl acrylate is preferably 50 parts by mass or more, more preferably 70 parts by mass or more, and preferably 300 parts by mass or less with respect to 100 parts by mass of the structural unit derived from methyl methacrylate. , More preferably 200 parts by mass or less.
- the monomer (a41) When the copolymer (A) contains a structural unit derived from the monomer (a41), the monomer (a41) has a content of 100 parts by mass of the structural unit (iii) in the copolymer (A).
- the content of the derived structural unit is preferably 200 parts by mass or more, more preferably 250 parts by mass or more, and preferably 1000 parts by mass or less.
- the copolymer (A) contains a structural unit derived from the monomer (a41) and the structural unit (iii) in the copolymer (A) contains a structural unit derived from acrylate, antifouling property and antifouling resistance.
- the methacrylate of the monomer (a41) is used with respect to 100 parts by mass of the structural unit derived from the acrylate in the structural unit (iii).
- the content of the derived structural unit is preferably 50 parts by mass or more, more preferably 100 parts by mass or more, further preferably 150 parts by mass or more, preferably 700 parts by mass or less, more preferably 500 parts by mass or less, and further. It is preferably 400 parts by mass or less.
- the content thereof is such that an antifouling coating film having excellent antifouling property and damage resistance can be easily obtained. Therefore, it is preferably 45% by mass or more, more preferably 50% by mass or more, still more preferably 53% by mass or more, and preferably 80% by mass or less, based on 100% by mass of all the constituent units of the copolymer (A). It is preferably 75% by mass or less, more preferably 70% by mass or less.
- the monomer (a42) examples include 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, 4-methoxybutyl (meth) acrylate, and 3-methoxy-n-propyl (meth).
- 2-methoxyethyl (meth) acrylate and 2-ethoxyethyl (meth) acrylate are preferable, and 2-methoxyethyl (meth) acrylate is preferable from the viewpoint that a coating film having particularly excellent antifouling property can be easily obtained.
- Acrylate is more preferred, and 2-methoxyethyl acrylate is even more preferred.
- the copolymer (A) has a structural unit derived from the monomer (a42), the content thereof is preferably 1% by mass or more with respect to 100% by mass of all the structural units of the copolymer (A). It is more preferably 3% by mass or more, preferably 20% by mass or less, and more preferably 12% by mass or less.
- the monomer (a4) other than the monomers (a41) and (a42) include n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 3,5.
- the copolymer (A) can be synthesized, for example, by the following procedure.
- the monomer (a11) or (a12) is used as the monomer (a1)
- the monomer (a11) or (a12) is first synthesized.
- the method for synthesizing the monomer (a11) or (a12) include an inorganic metal compound (preferably an oxide of copper or zinc, a hydroxide, a chloride, etc.) and a methacrylic acid, an acrylic acid, or the like.
- Known methods such as heating an organic acid or an esterified product thereof at a temperature equal to or lower than the decomposition temperature of an inorganic metal compound in the presence of an organic solvent and water and stirring the mixture can be mentioned. More specifically, first, a mixed solution of a mixture of an organic solvent and an inorganic metal compound such as zinc oxide is heated to about 50 to 80 ° C. while stirring, and an organic acid such as methacrylic acid or acrylic acid is added thereto. Alternatively, a method of dropping a mixed solution containing the esterified product and water or the like and further stirring the mixture can be mentioned.
- the copolymer (A) can be synthesized by dropping a mixed solution containing an initiator, a chain transfer agent, a solvent and the like and carrying out a polymerization reaction.
- the polymerization initiator that can be used for the synthesis of the copolymer (A) is not particularly limited, and for example, 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], tert-butylperoxyoctate [TBPO] and the like can be mentioned.
- the amount of the polymerization initiator used is 100 in total of the monomers (a1) to (a4) from the viewpoint that an antifouling coating film having good antifouling property and excellent repairability can be easily obtained. It is preferably 2 parts by mass or more, more preferably 9 parts by mass or more, preferably 20 parts by mass or less, and more preferably 18 parts by mass or less with respect to parts by mass. When TBPO is contained, the amount used is preferably 1 to 5 parts by mass with respect to a total of 100 parts by mass of the monomers (a1) to (a4).
- the chain transfer agent that can be used for the synthesis of the copolymer (A) is not particularly limited, and for example, ⁇ -methylstyrene dimer, thioglycolic acid, diterpen, turpinolene, ⁇ -terpinene; tert-dodecyl mercaptan, n. -Mercaptans such as dodecyl mercaptan; halides such as carbon tetrachloride, methylene chloride, bromoform and bromotrichloroethane; secondary alcohols such as isopropanol and glycerin; These chain transfer agents may be used alone or in combination of two or more. When a chain transfer agent is used, the amount used is preferably 0.1 to 5 parts by mass with respect to a total of 100 parts by mass of the monomers (a1) to (a4).
- Examples of the solvent that can be used for the synthesis of the copolymer (A) include aromatic solvents such as toluene, xylene and mesitylen; alcohols such as propanol, butanol, propylene glycol monomethyl ether and dipropylene glycol monomethyl ether; and methyl ethyl ketone. , Methylisobutylketone, ketones such as methylamylketone; esters such as ethyl acetate and butylacetate; water;
- aromatic solvents such as toluene, xylene and mesitylen
- alcohols such as propanol, butanol, propylene glycol monomethyl ether and dipropylene glycol monomethyl ether
- methyl ethyl ketone Methylisobutylketone, ketones such as methylamylketone; esters such as ethyl acetate and butylacetate; water;
- the composition contains zinc oxide (B).
- the shape, average particle size, etc. of the zinc oxide (B) are not particularly limited, and the present composition may contain two or more types of zinc oxide having different shapes, average particle size, and the like.
- the present composition contains zinc oxide (B)
- an antifouling coating film having sufficient antifouling properties and excellent water resistance and damage resistance can be easily obtained.
- the average particle size (median diameter) of zinc oxide (B) is from the viewpoint that zinc oxide (B) is easily dispersed in the present composition and from the viewpoint of improving the antifouling property of the obtained antifouling coating film. Therefore, it is preferably 0.01 ⁇ m or more, more preferably 0.05 ⁇ m or more, particularly preferably 0.1 ⁇ m or more, preferably 10 ⁇ m or less, and more preferably 5 ⁇ m or less.
- the average particle size (median diameter) is a value measured by a laser diffraction / scattering method using SALD-2200 (manufactured by Shimadzu Corporation).
- the content of zinc oxide (B) in the present composition is such that an antifouling coating film having sufficient antifouling property and excellent repairability can be easily obtained.
- the content is 70 parts by mass or more and 200 parts by mass or less, preferably 75 parts by mass or more, more preferably 80 parts by mass or more, still more preferably 100 parts by mass or more, and preferably 190 parts by mass or less. , More preferably 180 parts by mass or less, still more preferably 160 parts by mass or less.
- the present composition may contain other optional components other than the above (A) and (B), such as an antifouling agent (C) and other pigment (D).
- optional components such as an antifouling agent (C) and other pigment (D).
- Monocarboxylic acid compound (E), defoamer (F), solvent (G), anti-sag / anti-settling agent (H), plasticizer (I), other binder component (J), wet dispersant (K) , Defoaming agent (L) may be contained.
- the present composition preferably further contains the antifouling agent (C).
- the antifouling agent (C) in the present composition may be one kind or two or more kinds.
- antifouling agent (C) examples include (+/-)-4- [1- (2,3-dimethylphenyl) ethyl] -1H-imidazole (also known as medetomidine) and 4-bromo-2- (4).
- the content thereof is 100, from the viewpoint that an antifouling coating film having sufficient antifouling property can be easily obtained. It is preferably 1% by mass or more, more preferably 5% by mass or more, preferably 70% by mass or less, and more preferably 50% by mass or less with respect to the mass%.
- Two or more kinds of antifouling agent (C) may be used.
- an antifouling coating composition having excellent storage stability can be easily obtained, has sufficient antifouling property, and is excellent in water resistance.
- Suitable combinations include medetomidine and copper pyrithione, medetomidine and zinc pyrithione, medetomidine and cuprous oxide and copper pyrithione, and traropyryl and zinc pyrithione from the viewpoint that an antifouling coating can be easily obtained.
- the medetomidine is a compound represented by the following formula (4). Since this composition contains zinc oxide (B) as an essential component, when medetomidine is further contained, an antifouling coating film having excellent barnacle resistance for a longer period of time due to the contribution presumed to be due to the interaction between zinc and medetomidine. Can be easily obtained.
- Medetomidine has optical isomerism, but may be only one of them or a mixture of any ratio.
- the present composition may use an adduct to an imidazolium salt, a metal, or the like as a part or all of medetomidine.
- an adduct to an imidazolium salt, a metal, or the like may be used as a raw material for preparing the composition, and the adduct to the imidazolium salt, the metal, or the like may be used in the composition or the antifouling coating film. You may form a body.
- the content thereof is based on 100% by mass of the solid content of the present composition from the viewpoint that an antifouling coating film having sufficient antifouling property can be easily obtained. It is preferably 0.02% by mass or more, more preferably 0.05% by mass or more, preferably 2% by mass or less, and more preferably 0.5% by mass or less.
- the present composition contains tralopyryl
- the content thereof is 100% by mass of the solid content of the present composition from the viewpoint that an antifouling coating film having sufficient antifouling property can be easily obtained.
- it is preferably 1% by mass or more, more preferably 2% by mass or more, preferably 10% by mass or less, and more preferably 8% by mass or less.
- the metal pyrithiones copper pyrithione and zinc pyrithione are preferable, and an antifouling coating film having excellent water resistance, crack resistance, and repairability can be easily obtained. Copper pyrithione is preferable from the viewpoint that an antifouling coating film having a wide range of antifouling properties can be easily obtained.
- the present composition contains metal pyrithiones, the content thereof is 100% by mass of the solid content of the present composition from the viewpoint that an antifouling coating film having sufficient antifouling property can be easily obtained. On the other hand, it is preferably 1% by mass or more, more preferably 3% by mass or more, preferably 20% by mass or less, and more preferably 15% by mass or less.
- cuprous oxide particles having an average particle size (median diameter) of about 0.1 to 30 ⁇ m can easily obtain an antifouling coating film having antifouling properties for a long period of time.
- those surface-treated with glycerin, stearic acid, lauric acid, sucrose, lecithin, mineral oil and the like can easily obtain an antifouling coating composition having excellent long-term stability during storage. Is preferable.
- cuprous oxide examples include NC-301 (manufactured by NC Tech Co., Ltd.), NC-803 (manufactured by NC Tech Co., Ltd.), Red Copp 97N Premium (manufactured by AMERICAN CHEMET Co.), and the like. Examples include Purple Copper (manufactured by AMERICAN CHEMET Co.) and LoLoTint97 (manufactured by AMERICAN CHEMET Co.).
- the content thereof is such that an antifouling coating film having an appropriate degree of coating film consumption and sufficient antifouling property can be easily obtained.
- 100% by mass of the solid content of the present composition it is preferably 10% by mass or more, more preferably 20% by mass or more, preferably 50% by mass or less, and more preferably 40% by mass or less.
- This composition is used for purposes other than zinc oxide (B) and antifouling agent (C), for example, for the purpose of coloring the coating film and concealing the base, and for the purpose of adjusting the coating film strength to an appropriate level. It may contain the pigment (D).
- the present composition contains the other pigment (D)
- the other pigment (D) in the present composition may be one kind or two or more kinds.
- pigments (D) include, for example, zinc phosphate, talc, mica, clay, potassium long stone, calcium carbonate, kaolin, alumina white, white carbon, aluminum hydroxide, magnesium carbonate, barium carbonate, barium sulfate, calcium sulfate, etc.
- extender pigments such as zinc sulfide
- colored pigments such as barium sulfate (red iron oxide), titanium white (titanium oxide), yellow iron oxide, carbon black, naphthol red, and phthalocyanine blue.
- the total content thereof may be appropriately set depending on the hiding property required for the antifouling coating film to be formed and the viscosity of the antifouling coating composition.
- the solid content of the present composition is preferably 1 to 40% by mass with respect to 100% by mass.
- the other pigment (D) preferably contains zinc phosphate because it has sufficient antifouling properties and can easily obtain an antifouling coating film having excellent discoloration resistance and crack resistance. ..
- the content thereof is preferably 2% by mass or more, more preferably 5% by mass or more, and preferably 20% by mass with respect to 100% by mass of the solid content of the present composition. % Or less, more preferably 10% by mass or less.
- the other pigment (D) preferably contains calcium sulfate from the viewpoint that an antifouling coating film having excellent water resistance can be easily obtained.
- the content thereof is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and preferably 0.5% by mass or more, based on 100% by mass of the solid content of the present composition. Is 5% by mass or less, more preferably 2% by mass or less.
- the other pigment (D) preferably contains talc from the viewpoint that an antifouling coating film having excellent crack resistance can be easily obtained.
- the content thereof is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 20% by mass or less with respect to 100% by mass of the solid content of the present composition. , More preferably 10% by mass or less.
- the present composition may contain a monocarboxylic acid compound (E).
- the renewability of the formed antifouling coating film from the surface in water is improved, and when the antifouling coating film contains an antifouling agent, the property is improved.
- the antifouling property of the antifouling coating film can be enhanced, and the antifouling coating film also has a function of imparting appropriate water resistance, and further, the antifouling coating composition. Painting workability also tends to be good.
- the present composition contains the compound (E)
- the compound (E) in the present composition may be one kind or two or more kinds.
- Examples of the compound (E) include R-COOH (R is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 40 carbon atoms and a saturated or unsaturated alicyclic hydrocarbon group having 3 to 40 carbon atoms. , Or a compound represented by a hydrocarbon group having 3 to 40 carbon atoms in which the hydrogen atom of the saturated or unsaturated alicyclic hydrocarbon group is replaced with a saturated or unsaturated aliphatic hydrocarbon group). Alternatively, these derivatives (eg, metal esters) are preferred.
- the compound (E) include avietic acid, neoavietic acid, dehydroavietic acid, palastolic acid, isopimaric acid, pimaric acid, trimethylisobutenylcyclohexenecarboxylic acid, versatic acid, stearic acid, naphthenic acid and the like.
- versatic acid is particularly preferable from the viewpoint that an antifouling coating film having excellent coating property properties can be easily obtained.
- rosins containing abietic acid, palastolic acid, isopimaric acid and the like as main components are also preferable.
- rosins include rosins such as gum rosin, wood rosin and tall oil rosin, hydrogenated rosins, disproportionated rosins, rosin derivatives such as rosin metal salts, and pineapple.
- Compound (E) may be a metal ester.
- the metal ester include zinc ester and copper ester.
- the metal ester may be used as a raw material when preparing the present composition, and the metal ester is formed in the present composition or an antifouling coating film. May be good.
- the present composition contains the compound (E), the content thereof makes it possible to easily obtain an antifouling coating composition having excellent coating workability and easily obtain an antifouling coating film having excellent water resistance.
- it is preferably 0.1% by mass or more, more preferably 1% by mass or more, preferably 50% by mass or less, and more preferably 20% by mass with respect to 100% by mass of the solid content of the present composition. It is as follows.
- the present composition may contain an antifoaming agent (F).
- the defoaming agent include an agent having an action of making the surface of the foam to be formed non-uniform and suppressing the formation of the foam, and an agent having the action of locally thinning the surface of the formed foam to break the foam. Examples include agents that have.
- the present composition contains an antifoaming agent, it is possible to suppress the inhibition of smoothness of the coating film shape due to foaming at the time of forming the coating film.
- the antifoaming agent (F) in the present composition may be one kind or two or more kinds.
- Examples of the defoaming agent (F) include silicone-based defoaming agents and non-silicone-based defoaming agents.
- Examples of the silicone-based defoaming agent include a defoaming agent containing polysiloxane having surface activity or a modified product thereof, and examples of the non-silicone-based defoaming agent include a defoaming agent other than the silicone-based defoaming agent (poly).
- silicone-based defoaming agent examples include oil-type, compound-type, self-emulsifying-type, and emulsion-type defoaming agents.
- non-silicone defoaming agent examples include higher alcohol-based, higher alcohol derivative-based, fatty acid-based, fatty acid derivative-based, paraffin-based, polymer-based (eg, (meth) acrylic polymerization system), mineral oil-based defoaming agent, and the like. Agents can be mentioned.
- the defoaming agent (F) preferably contains a silicone-based defoaming agent, more preferably contains only a silicone-based defoaming agent, and further preferably contains a fluorine-modified silicone-based defoaming agent. It is preferable, and it is particularly preferable to contain only a fluorine-modified silicone-based antifoaming agent.
- the fluorine-modified silicone-based defoaming agent is a defoaming agent having a fluorine-modified polysiloxane structure.
- defoaming agent (F) a commercially available product may be used.
- fluorine-modified silicone defoamers include fluorosilicone oil defoamers such as "BYK-066N” manufactured by Big Chemie Japan Co., Ltd. and "FA-630" manufactured by Shin-Etsu Chemical Co., Ltd. Agents can be mentioned.
- silicone-based defoamers other than fluorine-modified silicone-based defoamers include "KF-96" manufactured by Shin-Etsu Chemical Co., Ltd. and "BYK-081” manufactured by Big Chemie Japan Co., Ltd. Silicone oil-based defoaming agent.
- non-silicone defoamers include, for example, mineral oil defoamers such as “BYK-030” manufactured by Big Chemie Japan Co., Ltd .; “Disparon OX68” manufactured by Kusumoto Kasei Co., Ltd., Big Chemie. Examples thereof include polymer-based defoamers such as "BYK-1790” manufactured by Japan Co., Ltd.
- the content in the form thereof is preferably 0.1 part by mass or more, more preferably 0.1 part by mass or more, based on 100 parts by mass of the content of the copolymer (A). Is 0.2 parts by mass or more, preferably 1 part by mass or less, and more preferably 0.6 parts by mass or less.
- a defoaming agent (F) having an a% solid content is used as the defoaming agent (F) used when preparing this composition
- b parts by mass is used with respect to 100 parts by mass of the copolymer (A).
- the "as-is" content of the antifoaming agent (F) is b parts by mass.
- the present composition may contain a solvent (G) such as water or an organic solvent, if necessary, for the purpose of adjusting the viscosity of the composition.
- a solvent (G) such as water or an organic solvent, if necessary, for the purpose of adjusting the viscosity of the composition.
- the liquid containing the copolymer (A) obtained when synthesizing the copolymer (A) may be used as it is.
- examples of the solvent (G) include a solvent contained in the liquid, a solvent added separately when the copolymer (A) is mixed with other optional components, if necessary, and the like.
- an organic solvent is preferable.
- the solvent (G) in the present composition may be one kind or two or more kinds.
- organic solvent examples include aromatic organic solvents such as xylene, toluene and ethylbenzene; ketones such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ethanol, isopropyl alcohol, n-butanol, isobutanol, propylene glycol monomethyl ether and the like.
- aromatic organic solvents such as xylene, toluene and ethylbenzene
- ketones such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone
- ethanol isopropyl alcohol, n-butanol, isobutanol, propylene glycol monomethyl ether and the like.
- examples thereof include aliphatic (1 to 10, preferably about 2 to 5) monohydric alcohols; ester-based solvents such as ethyl acetate and butyl acetate.
- the content thereof may be appropriately set so as to have a desired viscosity according to the coating method of the antifouling coating composition, but the content is 100% by mass of the present composition. On the other hand, it is usually preferably about 0 to 50% by mass. If the content of the solvent (G) is too large, problems such as deterioration of the sagging prevention property may occur.
- the present composition may contain a sagging inhibitor / sedimentation inhibitor (H) for the purpose of adjusting the viscosity of the composition.
- a sagging inhibitor / sedimentation inhibitor H
- the anti-sagging agent / anti-settling agent (H) in the present composition may be one kind or two or more kinds.
- anti-sag / sedimentation inhibitor examples include organic clay waxes (eg, stearate salts of Al, Ca, Zn, lecithin salts, alkyl sulfonates), organic waxes (eg, polyethylene wax, etc.).
- organic clay waxes eg, stearate salts of Al, Ca, Zn, lecithin salts, alkyl sulfonates
- organic waxes eg, polyethylene wax, etc.
- Polyamide oxide wax, amido wax, polyamide wax, hydrogenated castor oil wax), a mixture of organic clay wax and organic wax, and synthetic fine powder silica can be mentioned.
- the anti-sagging agent / sedimentation inhibitor (H) Commercially available products may be used as the anti-sagging agent / sedimentation inhibitor (H), and the commercially available products include, for example, “Disparon 305", “Disparon 4200-20”, and “Disparon” manufactured by Kusumoto Kasei Co., Ltd. Examples include “A630-20X”, “Disparon 6900-20X”, and “ASAD-120” manufactured by Itoh Oil Chemicals Co., Ltd.
- the content thereof is preferably 0.01% by mass or more, more preferably 0.% by mass, based on 100% by mass of the solid content of the present composition. It is 1% by mass or more, preferably 10% by mass or less, and more preferably 3% by mass or less.
- the present composition may contain a plasticizer (I) for the purpose of imparting plasticity to the antifouling coating film.
- a plasticizer (I) for the purpose of imparting plasticity to the antifouling coating film.
- the plasticizer (I) in the present composition may be one kind or two or more kinds.
- plasticizer (I) examples include tricresyl phosphate (TCP), dioctyl phthalate (DOP), and diisodecyl phthalate (DIDP).
- TCP tricresyl phosphate
- DOP dioctyl phthalate
- DIDP diisodecyl phthalate
- the content thereof is preferable with respect to 100% by mass of the solid content of the present composition from the viewpoint that the plasticity of the antifouling coating film can be kept good.
- This composition may contain a binder component (J) other than the copolymer (A) for the purpose of imparting water resistance, crack resistance and strength to the antifouling coating film to be formed. good.
- the component (J) in the present composition may be one kind or two or more kinds.
- binder components (J) include, for example, polyester-based polymers, (meth) acrylic-based (co) polymers ((meth) acrylic resins), vinyl-based (co) polymers (including polyvinyl ethyl ether, etc.), and the like. Examples thereof include chlorinated paraffin, n-paraffin, terpenphenol resin, petroleum resins, and ketone resins. Among these, polyester-based polymers, (meth) acrylic (co) polymers, vinyl-based (co) polymers, chlorinated paraffins, and petroleum resins are preferable, and polyester-based polymers, chlorinated paraffins, and petroleum resins are preferable. Is more preferable. As such a (meth) acrylic (co) polymer or a vinyl (co) polymer, one or more of the monomers listed as the monomers (a3) and (a4) are used. The obtained polymer may be used.
- the content thereof is preferably 0.1 to 40% by mass with respect to 100% by mass of the solid content of the present composition.
- the present composition contains a polyester-based polymer
- an antifouling coating film having sufficient antifouling properties and excellent crack resistance can be easily obtained. Since the antifouling coating film obtained from this composition tends to have a slightly reduced crack resistance due to the characteristics of the copolymer (A), other binder component (J) is used in combination. Although the physical properties of the coating film can be improved, the other binder component (J) often lowers the antifouling property of the antifouling coating film. However, by using a polyester-based polymer as the other binder component (J), the crack resistance can be improved without lowering the antifouling property of the antifouling coating film.
- the polyester-based polymer can be obtained by reacting one or more polyhydric alcohols, one or more polyvalent carboxylic acids and / or anhydrides thereof, and optionally other components, and by a combination thereof.
- the hydroxyl value / acid value, viscosity, etc. can be adjusted.
- polyhydric alcohol examples include propylene glycol, glycerin, ethylene glycol, 1,6-hexanediol, trimethylolpropane (TMP), pentaerythritol, sorbitol; polyalkylene glycol such as diethylene glycol; and availability of raw materials.
- TMP trimethylolpropane
- polyalkylene glycol such as diethylene glycol
- Two or more of these polyhydric alcohols may be used.
- polyvalent carboxylic acid and / or its anhydride examples include malonic acid, maleic acid, fumaric acid, glutaric acid, adipic acid, pimeric acid, suberic acid, azelaic acid, sebacic acid, and 1,9-nonamethylenedicarboxylic acid.
- Acid 1,10-decamethylenedicarboxylic acid, 1,11-undecamethylenedicarboxylic acid, 1,12-dodecamethylenedicarboxylic acid, cyclohexanedicarboxylic acid, decahydronaphthalenedicarboxylic acid, terephthalic acid, isophthalic acid, phthalic acid, hexa Examples thereof include hydrophthalic acid, succinic acid and anhydrides thereof, and among these, phthalic acid anhydride and hexahydrophthalic acid anhydride are preferable.
- the solid content hydroxyl value is preferably 50 mgKOH / g or more, more preferably 80 mgKOH / g or more, preferably 150 mgKOH / g or less, and more preferably 130 mgKOH / g or less.
- the polyester-based polymer may be dissolved in a solvent and used as a solution (hereinafter, also referred to as "polyester-based polymer solution").
- the solvent the same solvent as the solvent mentioned as the above-mentioned solvent (G) can be used.
- the polyester-based polymer solution may contain an unreacted raw material.
- the polyester-based polymer solution has a viscosity at 25 ° C. of preferably 3,000 mPa ⁇ s or less, more preferably 1,000 mPa ⁇ s or less, from the viewpoint of reducing the viscosity of the antifouling coating composition. desirable.
- polyester polymer examples include Tesslac 2474 (polyester polyol, hydroxyl value: 121 mgKOH / g) and Tesslac 2462 manufactured by Hitachi Chemical Co., Ltd.
- the content thereof is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further, with respect to 100% by mass of the solid content of the present composition. It is preferably 1.0% by mass or more, preferably 40% by mass or less, more preferably 30% by mass or less, and further preferably 20% by mass or less.
- 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. good.
- the average number of carbon atoms in one molecule of chlorinated paraffin is preferably 8 or more, more preferably 10 or more, preferably 30 or less, and more preferably 26 or less.
- chlorinated paraffin By using such chlorinated paraffin, it is possible to easily form an antifouling coating film with few cracks and peeling. If the average number of carbon atoms is less than 8, the effect of suppressing the occurrence of cracks in the formed antifouling coating film may be insufficient, while if the average number of carbon atoms exceeds 30, it is formed.
- the hydrolyzability of the antifouling coating film (coating film wearability, renewability, cleanability) becomes excessively small, and as a result, the antifouling property may be inferior.
- the viscosity of chlorinated paraffin (unit: poison, measurement temperature: 25 ° C.) is preferably 1 or more, more preferably 1.2 or more. Its specific gravity (25 ° C.) is preferably from 1.05 g / cm 3 or more, more preferably 1.10 g / cm 3 or higher, preferably 1.80 g / cm 3 or less, more preferably 1.70 g / cm 3 It is as follows.
- the chlorination rate (chlorine content) of the chlorinated paraffin is usually 35 to 70% by mass, preferably 35 to 65% by mass, assuming that the chlorinated paraffin is 100% by mass.
- Examples of the petroleum resins include C5 type, C9 type, styrene type, dichloropentadiene type, and hydrogenated substances thereof.
- a commercially available product may be used as the other binder component (J), and the commercially available product may be, for example, a (meth) acrylic copolymer ((meth) acrylic resin) manufactured by Mitsubishi Rayon Corporation.
- Dianal BR-106 as chlorinated paraffin, for example," Toyoparax A-40 / A-50 / A-70 / A-145 / A-150 / 150 "manufactured by Tosoh Corporation, as petroleum resins, for example, Examples thereof include "Quinton 1500” and "Quinton 1700” (both manufactured by Nippon Zeon Corporation).
- the present composition contains a wet dispersant (K) for the purpose of improving the dispersibility of zinc oxide (B), the antifouling agent (C) and other pigments (D) in the antifouling coating composition. May be.
- the wet dispersant (K) in the present composition may be one kind or two or more kinds.
- wet dispersant (K) is generally used to improve the efficiency of pigment dispersion during paint production.
- the copolymer (A) which tends to have a low surface free energy, is used, highly polar pigments and antifouling agents may have poor surface wetting, and these are uniform.
- the dispersion may not proceed sufficiently, and the physical properties of the coating film such as the crack resistance of the resulting antifouling coating film may deteriorate. Therefore, the present composition preferably has a wetting dispersant (K) from the viewpoint that an antifouling coating film having good physical properties can be easily obtained.
- wet dispersant (K) examples include known organic or inorganic pigment dispersants. Specific examples include aliphatic amines, polyfunctional organic acids (eg, "Disperbyk101” (long-chain polyaminoamide and polar acid ester salt) manufactured by Big Chemie Japan Co., Ltd., "Disperbyk108” (hydroxyl-containing carboxylic acid ester). ).
- the content thereof is 100, from the viewpoint that an antifouling coating film having excellent crack resistance and water resistance can be easily obtained.
- mass% it is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, preferably 10% by mass or less, and more preferably 5% by mass or less.
- the present composition may contain a dehydrating agent (L) for the purpose of improving the storage stability thereof.
- the dehydrating agent (L) in the present composition may be one kind or two or more kinds.
- Examples of the dehydrating agent (L) include synthetic zeolite, anhydrous gypsum, and hemihydrate gypsum (also known as roasted gypsum) as inorganic dehydrating agents, and tetramethoxysilane and tetraethoxysilane as organic dehydrating agents. , Tetrabutoxysilane, tetraphenoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, trimethylethoxysilane and other alkoxysilanes or their condensates, orthosilicate alkyl esters such as methyl orthosilicate and ethyl orthosilicate.
- the content thereof is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, based on 100% by mass of the solid content of the present composition. Yes, preferably 20% by mass or less, more preferably 15% by mass or less.
- the present composition can be prepared by using the same equipment, method and the like used when preparing a known general antifouling coating composition. Specifically, after synthesizing the copolymer (A), the obtained copolymer (A) (solution), zinc oxide (B), and if necessary, other optional components are combined at once. Alternatively, it can be prepared by sequentially adding to a container, stirring and mixing. At this time, it is preferable that the copolymer (A) and zinc oxide (B) are brought into contact with each other first.
- the acid value of the solvent-soluble component of the present composition makes it possible to easily obtain an antifouling coating film having long-term antifouling properties and excellent water resistance while suppressing the degree of coating film consumption. From the above points, it is preferably 30 mgKOH / g or more, more preferably 40 mgKOH / g or more, preferably 95 mgKOH / g or less, and more preferably 90 mgKOH / g or less.
- the “acid value of the solvent-soluble component” in the present invention refers to the acid value of the component (mixture) soluble in a specific solvent, which will be described later, among the solid components excluding the volatile components in the coating composition. It is considered that the component soluble in the solvent is mainly a component that forms a continuous phase of a coating film such as a resin and a resin acid (rosin, versatic acid, etc.). Since the acid value of the solvent-soluble component is the average value of the acid values of these components, it indicates the total acid concentration of the continuous phase of the coating film, and when this is within the above range, the above-mentioned excellent effect can be obtained. It is believed that it can be obtained.
- the acid value is defined by the amount (mg) of potassium hydroxide (KOH) required to neutralize 1 g of the component of interest, expressed in units of mgKOH / g, and represents the acid group content of the object. It is a numerical value widely used in.
- the acid value of the solvent-soluble component can be measured by a method or the like in accordance with JIS K 5601-2-1: 1999 for the solvent-soluble component obtained by extracting the present composition with a solvent.
- the acid value of the solvent-soluble component can be measured by, for example, the following steps (1) to (6).
- (1) Take the weighed composition and a xylene / ethanol mixed solution having a mass about 10 times that of the weighed composition in a centrifuge tube and mix them thoroughly.
- (2) After centrifuging at 0 ° C. and 3,500 rpm for 30 minutes, the supernatant is removed and transferred to another container.
- (3) Add the same amount of xylene / ethanol mixed solution as in (1) to the extraction residue again, mix, centrifuge under the same conditions as in (2), extract the supernatant, and put it in the container containing the first supernatant. Add. This operation is repeated one more time.
- the total of the supernatants obtained by the above three centrifugations is used as an extract, and the solid content mass% of this extract is measured.
- the solid content mass% is determined by weighing a part of the extract, drying the weighed extract in a hot air dryer at 108 ° C. for 3 hours, measuring the mass of the remaining solid content, and measuring the solid content in the weighed extract. Calculate the fractional mass ratio.
- About 5 g of the extract is placed in a beaker, the mass of the extract is measured, and the value of the solid content mass% obtained in (4) above is used with the sample in the extract.
- the mass of the solvent-soluble component is calculated and the value is defined as x.
- the extract is diluted with ethanol to a total volume of 50 mL.
- V X Titration value (ml) for diluted ethanol solution
- V 0 Titration value for blank
- f Factor of 0.1 mol / L potassium hydroxide solution used for titration
- Hiranuma automatic titrator COM-1750 manufactured by Hiranuma Sangyo Co., Ltd.
- the solvent-soluble component can be extracted and its acid value can be measured not only from the coating composition but also from the formed coating film by the same method.
- the antifouling coating film (hereinafter, also referred to as “the present coating film”) according to the embodiment of the present invention is formed from the present composition and can usually be obtained by drying the present composition.
- the main coating film is usually formed on a base material and is used as a base material with a main coating film having the base material and the main coating film.
- a preferred example of the method for producing the base material with a coating film is a method including a step of providing the composition on at least a part of the base material and then drying it.
- the antifouling method for a base material includes a step of forming the present coating film on at least a part of the base material. Since the method for producing a base material with a present coating film includes a step of forming the main coating film on at least a part of the base material, it can be said to be an antifouling method for the base material.
- the base material is not particularly limited, but the composition is preferably used for long-term antifouling of the base material in a wide range of industrial fields such as ships, fisheries, and underwater structures.
- the base material include ships (eg, container ships, large steel ships such as tankers, fishing boats, FRP ships, wooden ships, hull skins of yachts, etc., including both new ships and repair ships), and fishing materials.
- ships eg, container ships, large steel ships such as tankers, fishing boats, FRP ships, wooden ships, hull skins of yachts, etc., including both new ships and repair ships
- fishing materials eg, ropes, fishing nets, fishing gear, floats, buoys
- oil pipelines water conduits, circulating water pipes, diver suits, underwater glasses, oxygen cylinders, swimwear, torpedoes, water supply and drainage ports of thermal and nuclear power plants, etc.
- the base material may be a base material treated with another treatment agent such as a rust preventive, or a base material having a coating film such as a primer formed on the surface, and the main coating film is formed. It may be a base material.
- the object that the coating film comes into direct contact with is not particularly limited.
- the method of providing the present composition on at least a part of the base material is not particularly limited, and for example, a method of coating the present composition on the base material and a method of immersing the base material in the present composition (the present composition is used as the base material). Is impregnated into the water).
- the coating method include known methods such as a method using a brush, a roller, and a spray.
- drying method examples include a method of leaving the product at room temperature (eg, 25 ° C.) for preferably about 0.5 to 14 days, more preferably about 1 to 7 days.
- the drying may be carried out under heating or while blowing air.
- the thickness of the coating film after drying may be arbitrarily selected depending on the degree of coating film consumption of the coating film, the intended use of the coating film, the period of use, etc., and is, for example, 30 to 1,000 ⁇ m. The degree is preferable.
- a method for producing a coating film having this thickness once the composition is applied so as to obtain a dry coating film having a thickness of preferably 10 to 300 ⁇ m, more preferably 30 to 200 ⁇ m per coating. -There is a method of painting multiple times.
- the base material with the main coating film may be produced by a method including a step of forming the main coating film (I') and a step of attaching the obtained main coating film to the base material (II').
- the step (I') is not particularly limited, and examples thereof include a method in which the present composition is provided on at least a part of a base material, in which a support that has been released from the mold is used instead of the base material. ..
- the step (II') is also not particularly limited, and examples thereof include the methods described in JP-A-2013-129724.
- the method for repairing a base material with an antifouling coating film includes a step of applying a repair paint to the base material with the main coating film, preferably to the deteriorated base material with the main coating film.
- a step of applying the repair paint to the deteriorated base material with the main coating film is performed.
- the deteriorated base material with the coating film may be washed with water to remove stains on the surface, dried, and then coated with the repair paint.
- deteriorated base material with a coating film refers to a base material with a coating film after the base material with the main coating film is used in contact with water (seawater), for example.
- water water
- a base material with a coating film after the service life of the antifouling coating film has expired can be mentioned. Since this coating film usually deteriorates when used in this way, it is stipulated that it is “deteriorated”, but the degree of deterioration is not particularly limited, and the functions required for this coating film are sufficient. It also includes a base material with a coating film in a state where it can be exhibited.
- the deterioration may damage an anticorrosion coating film, an intermediate coating film, or the like normally formed in the lower layer thereof.
- the method for repairing the base material with an antifouling coating film may be specifically a method for repairing an antifouling coating film, or a method for repairing an anticorrosion coating film, an intermediate coating film, or the like.
- a repair method that includes both of these may be used. Therefore, the repair paint used in the method for repairing the base material with the antifouling coating film may be appropriately selected and used according to the object of repair, and the antifouling paint may be used, and the anticorrosion paint or the intermediate coating paint may be used. May be used, and antifouling paint may be used after using the anticorrosion paint or the intermediate coating paint. As the antifouling paint in this case, it is preferable to use this composition.
- the repair paint includes an antifouling paint, a paint capable of forming a coating film having the same function as a coating film normally formed between a base material and the main coating film (eg, anticorrosion paint, intermediate coating paint). ).
- a paint capable of forming a coating film having the same function as a coating film normally formed between a base material and the main coating film eg. anticorrosion paint, intermediate coating paint.
- paints having anticorrosion paint properties are also referred to as binder paints.
- a binder paint is preferable from the viewpoint that the effects of the present invention are more exhibited.
- the antifouling paint used as the repair paint is not particularly limited, but this composition is preferable, and it is more preferable that the composition is the same as the present composition used when forming the deteriorated main coating film.
- binder paint examples include paints containing resins such as epoxy-based, vinyl-based, and (meth) acrylic-based paints, and paints containing two or more kinds of resins among these, and epoxy-based paints are used in terms of corrosion resistance. Paints are preferable, and vinyl-based and (meth) acrylic-based paints are preferable in terms of improving the adhesion between the anticorrosion coating and the antifouling coating, and from the viewpoint of overall performance, the above two or more types are preferable. A paint containing the above resin is also preferable.
- the binder paint contains known additives such as thermoplastic resins, plasticizers, inorganic fillers, coloring pigments, rust preventives, organic solvents, curing accelerators, sagging agents, and sedimentation inhibitors. It may be further blended.
- Examples of the epoxy-based binder paint include paints containing one or more types of epoxy resins, and paints containing one or more types of epoxy resins and one or more types of curing agents are preferable.
- Examples of the epoxy resin include reaction-curable resins having two or more epoxy groups in one molecule and capable of being cured by reaction with a curing agent.
- Examples of the epoxy resin include bisphenol type, novolak type, and aliphatic type, and bisphenol type epoxy resin is preferable from the viewpoint of workability and rust prevention.
- the bisphenol type epoxy resin a resin having an epoxy equivalent of 160 to 500 is preferable, and a resin having an epoxy equivalent of 180 to 500 is more preferable.
- bisphenol type epoxy resin examples 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. Of these, bisphenol A type epoxy resin is preferable.
- Examples of the bisphenol A type epoxy resin include bisphenol A type diglycidyl ethers such as bisphenol A diglycidyl ether, bisphenol A polypropylene oxide diglycidyl ether, and bisphenol A ethylene oxide diglycidyl ether, and the bisphenol F type.
- Examples of the epoxy resin of the above include bisphenol F type diglycidyl ether such as bisphenol F diglycidyl ether.
- a commercially available product may be used as the bisphenol A type epoxy resin, and the commercially available product includes, for example, "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, the solid content is solid at room temperature).
- the curing agent examples include amine-based, carboxylic acid-based, acid anhydride-based, and silanol-based curing agents, and amine-based curing agents are preferable from the viewpoint of reactivity and adhesion to an object to be coated.
- the curing agent different types of curing agents may be used in combination.
- amine-based curing agent bifunctional or higher-functional amines such as aliphatic amines, alicyclic amines, aromatic amines, and heterocyclic amines, and modified products thereof are usually used. These amines are distinguished by the type of carbon to which the amino group is bonded.
- an aliphatic amine refers to a compound having at least one amino group bonded to the aliphatic carbon.
- An epoxy-based paint containing an amine-based curing agent can be cured at room temperature, and is therefore preferable for applications such as those applied in a room temperature environment.
- aliphatic amine examples include diethylenetriamine, dipropylenetriamine, tetraethylenepentamine, bis (cyanoethyl) diethylenetriamine, bishexamethylenetriamine, and norbornanediamine (NBDA / 2,5- or 2,6-bis (aminomethyl).
- NBDA norbornanediamine
- IPDA isophoronediamine
- MXDA m- Xylylenediamine
- Examples of the alicyclic amine include 1,4-cyclohexanediamine and 4,4'-methylenebiscyclohexylamine.
- aromatic amine examples include phenylenediamine, 4,4'-diaminobenzophenone, 4,4'-diaminodiphenyl ether, and 4,4'-diaminodiphenyl sulfone.
- heterocyclic amine examples include N-methylpiperazine.
- modified product of the amine examples include the polyamide of the amine and its modified product, an epoxy adduct body to which an epoxy compound is added, and a Mannich modified product. From the viewpoint of curability of the epoxy-based paint, the epoxy adduct body is used. Is preferable, and polyamide and its modified product are preferable from the viewpoint that a coating film having excellent corrosion resistance and adhesion to an object to be coated can be obtained.
- the active hydrogen equivalent of the amine-based curing agent is preferably 40 g / eq or more, more preferably 80 g / eq or more, from the viewpoint of the balance between the curability of the epoxy-based paint and the adhesion of the obtained coating film to the object to be coated. Yes, preferably 1,000 g / eq or less, more preferably 600 g / eq or less.
- the amine-based curing agent examples include polyamides such as "Raccamide N-153" and “Raccamide TD-966” manufactured by DIC Co., Ltd. and “Sunmide 315" manufactured by Sanwa Chemical Industry Co., Ltd.
- polyamides such as "Raccamide N-153" and “Raccamide TD-966” manufactured by DIC Co., Ltd. and "Sunmide 315" manufactured by Sanwa Chemical Industry Co., Ltd.
- PA-23 manufactured by Akishin Kagaku Co., Ltd., which is an epoxy adduct formed by adding an epoxy compound to polyamide, and Mannig modified product of modified polyamide, Co., Ltd.
- An example is "ADEKA Hardener EH-350” manufactured by ADEKA.
- a ketimine-type curing agent obtained by modifying the amine with a ketone can also be used.
- a ketimine-type curing agent include "Ancamine MCA” manufactured by Air Products Japan Co., Ltd., which is a ketimine-type modified alicyclic polyamine.
- the amine-based curing agent has an equivalent ratio of an epoxy component to an amine component (epoxy equivalent: active hydrogen equivalent) with respect to the epoxy resin, preferably 1: 0.25 to 1: 0.9. More preferably, it is used in an amount such that it is 1: 0.3 to 1: 0.8.
- an amine-based curing agent is used in such an amount, it tends to be possible to obtain a coating film having excellent drying properties, corrosion resistance, and topcoat compatibility (adhesion with a coating film that can be formed on an epoxy-based paint). It is in.
- the amount of the amine-based curing agent used is preferably 10 parts by mass or more, more preferably 20 parts by mass or more, and preferably 80 parts by mass or less, based on 100 parts by mass of the epoxy resin in the epoxy-based paint. It is preferably 70 parts by mass or less.
- each component or the present composition in the present specification refers to a component excluding the volatile component contained as a solvent in each component or the present composition, and each component or the present composition is kept at 108 ° C. It is synonymous with the one obtained by drying in a hot air dryer for 3 hours.
- -22-174ASX (trade name, manufactured by Shin-Etsu Chemical Industry Co., Ltd.) 10 parts, metal ester group-containing monomer mixture M1 31.3 parts, xylene 10 parts, Novmer MSD (trade name, manufactured in Production Example M1).
- a transparent mixture consisting of 0.8 part of Nichiyu Co., Ltd., chain transfer agent, ⁇ -methylstyrene dimer), 1 part of AIBN and 8 parts of AMBN was added dropwise at a constant velocity over 6 hours.
- a colorless and transparent hydrolyzable copolymer solution (A-1) having a Gardner viscosity of LM was obtained.
- the Gardner viscosity in the following examples is the result of measurement at 25 ° C. using a Gardner foam viscometer.
- Table 2 shows the details of each component used in the following examples and comparative examples.
- Example 1 to 8 and Comparative Examples 1 to 2 An antifouling coating composition was prepared by mixing and stirring each component in the amounts (parts by mass) shown in Table 3.
- the compounding amount of each component shown in Table 3 shows the compounding amount in the form.
- the amount of the fatty acid amide in the form (as a whole) is 1.5 parts by mass, and the solid content is 20% by mass. Therefore, the amount of the fatty acid amide itself is 0. 3 parts by mass.
- An epoxy-based rust preventive paint (epoxy AC paint, trade name "Banno 500", manufactured by China Paint Co., Ltd.) is applied to a sandblasted steel plate (length 100 mm x width 70 mm x thickness 2.3 mm), and the dry film thickness is about 100 ⁇ m. After applying it so that it becomes It was applied and dried for 1 day. Further, the antifouling coating composition obtained in the above Example or Comparative Example is applied onto the coating composition so that the dry film thickness is about 200 ⁇ m, and dried under 25 ° C. conditions for 7 days to perform an antifouling test. A board was made.
- the antifouling test plate prepared as described above is attached to a cylinder that rotates so that the surface of the test plate has a speed of about 15 kt in Hiroshima Bay, and while rotating at that speed, at a position about 1 meter below the water surface. Soaked.
- the aquatic organism adhesion area on the antifouling coating film was measured 6 months (dynamic 6 months) and 12 months (dynamic 12 months) after the start of immersion, and the following [Evaluation of antifouling property by aquatic organism adhesion area] Criteria], the antifouling property of the antifouling coating film was evaluated. The results are shown in Table 3.
- the antifouling coating composition obtained in the above Example or Comparative Example was applied to each of two PVC plates in a strip shape so that the dry film thickness was about 200 ⁇ m, and dried at 25 ° C. for 7 days to prevent A test plate with a dirty coating film was prepared.
- the thickness of the antifouling coating film was measured with a laser film thickness meter.
- Each of the two test plates with antifouling coating film prepared as described above was attached to a rotating rotor and immersed in a seawater tank whose temperature was adjusted to 15 ° C or 25 ° C while constantly changing water, and the test plates were used.
- the surface was rotated so that the speed was about 15 kt, and the thickness of the antifouling coating film was measured again with a laser film thickness meter 6 months after the start of rotation.
- the value obtained by dividing the reduced thickness of the antifouling coating film by 6 was calculated for each of the test plate immersed in seawater at 15 ° C and the test plate immersed in seawater at 25 ° C, and the average value was calculated as the coating film consumption. It was a degree.
- the results are shown in Table 3.
- ⁇ Damage resistance test> An epoxy-based rust preventive paint (epoxy AC paint, trade name "Banno 500", manufactured by China Paint Co., Ltd.) is applied to a sandblasted steel plate (length 150 mm x width 70 mm x thickness 1.6 mm), and the dry film thickness is about 100 ⁇ m. After applying it so that it becomes It was applied and dried for 1 day. Further, the antifouling coating composition obtained in the above Example or Comparative Example is applied onto the coating composition so that the dry film thickness is about 400 ⁇ m, and dried under 25 ° C. conditions for 7 days to perform an antifouling test. A board was made.
- epoxy AC paint epoxy AC paint, trade name "Banno 500", manufactured by China Paint Co., Ltd.
- the antifouling test plate prepared as described above is immersed in a seawater immersion tank kept at 25 ° C. for 6 months while changing water every week, then taken out from the immersion tank and dried for 7 days. rice field. On the test plate after drying, JIS K 5600-5-3: 1999 6.
- the damage on the coating film surface after dropping a weight having a drop height of 20 cm to 300 g was visually evaluated according to the following [damage resistance evaluation standard]. The results are shown in Table 3.
- Binder paint 1 composition of a main agent and a curing agent having the composition shown in Table 4 was applied onto the dried coating film so that the dry film thickness was about 100 ⁇ m, and dried for one day. Later, the same composition as the antifouling coating composition obtained in the above Example or Comparative Example used for producing the antifouling test plate was further applied so that the dry film thickness was about 400 ⁇ m. It was dried for 7 days.
- the obtained steel sheet with a coating film is immersed in a seawater immersion tank maintained at 25 ° C. for 3 months while changing water every week, and then by a method according to JIS K 5600-5-6: 1999. Cuts were made at intervals of 4 mm until the first coated antifouling coating film was reached on the steel sheet, and evaluation was performed according to the following [evaluation criteria for binder repairability]. The results are shown in Table 3.
- An antifouling coating composition was prepared by mixing and stirring each component in the amounts (parts by mass) shown in Table 5.
- the compounding amount of each component shown in Table 5 shows the compounding amount in the form.
- the acid value and paint viscosity of the solvent-soluble component were measured in the same manner as described above, and the antifouling property (dynamic 6 months), coating film wear resistance, damage resistance and binder were measured. The repairability was evaluated. The results are shown in Table 5.
- An antifouling coating composition was prepared by mixing and stirring each component in the amounts (parts by mass) shown in Table 6.
- the compounding amount of each component shown in Table 6 shows the compounding amount in the form.
- the acid value and paint viscosity of the solvent-soluble component were measured in the same manner as described above, and the antifouling property (standing 6 months, dynamic 6 months, dynamic 12 months) was determined. The degree of paint film wear, damage resistance and binder repairability were evaluated. The results are shown in Table 6.
- the antifouling coating film formed from the present composition has good antifouling property and good damage resistance while having an appropriate degree of coating film wear, and the antifouling coating film is said to have good antifouling property. It can be seen that the coating film has excellent adhesion to the repair paint (the coating film formed from the paint) even after being used in water (after deterioration).
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Abstract
Description
このような、シリコーン成分を含有する重合体を含む防汚塗料組成物として、例えば、特許文献1には、ポリオルガノシロキサンブロック含有加水分解性共重合体とメデトミジンとを含有する防汚塗料組成物が開示されている。
また、従来のシリコーン成分を含有する加水分解性重合体を含む防汚塗料組成物から得られる防汚塗膜は、船舶等の基材が受けるダメージに対する耐性が十分でないことも分かった。
本発明の構成例は以下のとおりである。
該共重合体(A)が、
金属エステル基含有単量体(a1)に由来する構成単位を5~25質量%、
下記式(2)で表されるオルガノシロキサンブロック含有単量体(a2)に由来する構成単位を5~15質量%、および、
下記式(3)で表される単量体(a3)に由来する構成単位を含み、
前記共重合体(A)の含有量100質量部に対する前記酸化亜鉛(B)の含有量が70~200質量部である、
防汚塗料組成物。
<5> 溶剤可溶分酸価が30~95mgKOH/gである、<1>~<4>のいずれかに記載の防汚塗料組成物。
<7> 基材と、<6>に記載の防汚塗膜とを有する、防汚塗膜付き基材。
<8> <1>~<5>のいずれかに記載の防汚塗料組成物を基材の少なくとも一部に設け、次いで乾燥する工程を含む、防汚塗膜付き基材の製造方法。
本発明の一実施形態に係る防汚塗料組成物(以下「本組成物」ともいう。)は、オルガノシロキサンブロックおよび金属エステル基を含有する加水分解性共重合体(A)(以下単に「共重合体(A)」ともいう。)と、酸化亜鉛(B)とを含有し、
該共重合体(A)が、
金属エステル基含有単量体(a1)に由来する構成単位を5~25質量%、
下記式(2)で表されるオルガノシロキサンブロック含有単量体(a2)に由来する構成単位を5~15質量%、および、
下記式(3)で表される単量体(a3)に由来する構成単位を含み、
前記共重合体(A)の含有量100質量部に対する前記酸化亜鉛(B)の含有量が70~200質量部である、組成物である。
本組成物は、特定の共重合体(A)を含有し、かつ、酸化亜鉛(B)の含有量が前記範囲にあるため、適度な塗膜消耗度と補修性とにバランスよく優れる防汚塗膜を形成することができる。
共重合体(A)は、オルガノシロキサンブロックおよび金属エステル基を含有する加水分解性の共重合体であり、
金属エステル基含有単量体(a1)に由来する構成単位を5~25質量%、
下記式(2)で表されるオルガノシロキサンブロック含有単量体(a2)に由来する構成単位を5~15質量%、および、
下記式(3)で表される単量体(a3)に由来する構成単位を有する。
このような特定の構成を有する共重合体(A)を用いることで、適度な塗膜消耗度と補修性とにバランスよく優れる防汚塗膜を得ることができる。
本組成物中に含まれる共重合体(A)は、1種でもよく、2種以上でもよい。
共重合体(A)のMnは、低粘度で貯蔵安定性に優れる防汚塗料組成物を容易に得ることができ、適度な塗膜消耗度を有する防汚塗膜を容易に得ることができ、また、補修性に優れる防汚塗膜を容易に得ることができる等の点から、好ましくは1,000以上、より好ましくは1,500以上であり、好ましくは5,000以下、より好ましくは3,000以下である。また、共重合体(A)のMwは、同様の理由から、好ましくは2,000以上、より好ましくは3,000以上であり、好ましくは10,000以下、より好ましくは6,000以下、特に好ましくは5,000以下である。
前記MnおよびMwは、ゲルパーミエーションクロマトグラフィーにより測定し、標準ポリスチレンにて換算することにより求められ、具体的には下記実施例に記載の方法で求められる。
なお、本組成物が共重合体(A)を2種以上含有する場合、前記含有量は2種以上の共重合体(A)の総含有量としての好ましい範囲であり、後述する各成分についても同様である。
共重合体(A)は、金属エステル基含有単量体(a1)に由来する構成単位(以下「構成単位(i)」ともいう。)を有する。共重合体(A)に含まれる構成単位(i)は、1種でも、2種以上でもよい。
なお、本発明において、共重合体(A)の全構成単位には、重合開始剤および連鎖移動剤に由来する構成単位は含まない。
共重合体(A)中の各構成単位の含有量は、核磁気共鳴分光法(NMR)、ガスクロマトグラフ質量分析(GC-MS)等で測定することができ、また、共重合体(A)を合成する際に用いる各単量体の使用量から算出することもできる。
R21は、末端エチレン性不飽和基を有していればよく、末端以外にエチレン性不飽和基を有していてもよいが、末端のみにエチレン性不飽和基を有していることがより好ましい。
なお、該脂環式炭化水素基は、脂肪族炭化水素基や芳香族炭化水素基により置換されていてもよい。
共重合体(A)は、下記式(2)で表されるオルガノシロキサンブロック含有単量体(a2)に由来する構成単位(以下「構成単位(ii)」ともいう。)を有する。共重合体(A)に含まれる構成単位(ii)は、1種でも、2種以上でもよい。
共重合体(A)が構成単位(ii)を含むことで、特に耐スライム性等の防汚性能が向上した防汚塗膜を容易に得ることができる。
前記アルキル基の炭素数は、好ましくは1~12、より好ましくは1~8、さらに好ましくは1~4である。
前記アリール基の炭素数は、好ましくは6~14、より好ましくは6~10である。
重合容易性の観点から、R1、R2およびR3はそれぞれ独立に、メチル基やブチル基などのアルキル基が好ましい。
Xとしては、例えば、(メタ)アクリロイルオキシエチル基、(メタ)アクリロイルオキシプロピル基、(メタ)アクリロイルオキシブチル基、メルカプトメチル基、メルカプトエチル基、メルカプトプロピル基、メルカプトブチル基が挙げられる。
式(2)中、m+nは、2以上であることが好ましい。つまり、オルガノシロキサンブロック含有単量体(a2)は、ポリオルガノシロキサンブロック含有単量体(a2)であることが好ましい。
このような単量体(a21)に由来する構成単位を有する共重合体(A)を含有する防汚塗料組成物は、防汚性により優れる防汚塗膜を形成できる点で好ましい。
このような単量体(a21)におけるmは、重合容易性等の観点から、好ましくは3以上、より好ましくは5以上であり、好ましくは200以下、より好ましくは70以下である。
このような単量体(a22)に由来する構成単位を有する共重合体(A)を含有する防汚塗料組成物は、補修性に優れる防汚塗膜を容易に形成できる傾向にあるため好ましい。
このような単量体(a22)におけるmは、重合容易性等の観点から、好ましくは3以上、より好ましくは5以上であり、好ましくは200以下、より好ましくは70以下である。
共重合体(A)がこのような単量体(a23)に由来する構成単位を有すると、粘度が低く、取扱いが容易である点で好ましい。
このような単量体(a23)におけるmは、50~1,000であることが好ましく、nは1~30であることが好ましい。
共重合体(A)は、下記式(3)で表される単量体(a3)に由来する構成単位(以下「構成単位(iii))」ともいう。)を有する。共重合体(A)に含まれる構成単位(iii)は、1種でも、2種以上でもよい。
共重合体(A)が構成単位(iii)を含むことで、補修性に優れる防汚塗膜を容易に得ることができ、得られる防汚塗膜の防汚性を大きく損なわずに塗膜消耗度を適切な更新速度に抑えることができる。このため、長期にわたり十分な防汚性を有する防汚塗膜を容易に得ることができる。
共重合体(A)は、任意に、前記単量体(a1)~(a3)以外のその他の単量体(a4)に由来する構成単位(以下「構成単位(iv)」ともいう。)を有していてもよく、該構成単位(iv)を有することが好ましい。共重合体(A)に含まれる構成単位(iv)は、1種でも、2種以上でもよい。
共重合体(A)がこのような単量体(a41)や(a42)に由来する構成単位を有すると、良好な防汚性を有しながら、耐ダメージ性や耐クラック性に優れる防汚塗膜を容易に得ることができ、また、本組成物を、塗装作業性に優れる粘度に調整することが容易となる。
共重合体(A)が単量体(a42)に由来する構成単位を有する場合、その含有量は、共重合体(A)の全構成単位100質量%に対し、好ましくは1質量%以上、より好ましくは3質量%以上であり、好ましくは20質量%以下、より好ましくは12質量%以下である。
ヒドロキシメチル(メタ)アクリレート、2-ヒドロキシエチル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート、4-ヒドロキシブチル(メタ)アクリレート、2-ヒドロキシ-3-フェノキシプロピル(メタ)アクリレート等のヒドロキシ基含有(メタ)アクリレート;
トリ(イソプロピル)シリル(メタ)アクリレート等のシリル基含有(メタ)アクリレート;
スチレン、α-メチルスチレン、酢酸ビニル、安息香酸ビニル、ビニルトルエン、アクリロニトリル、ビニルピリジン、ビニルピロリドン、塩化ビニル等のビニル化合物;
が挙げられる。
共重合体(A)は、例えば、以下の手順で合成することができる。
前記単量体(a1)として前記単量体(a11)または(a12)を用いる場合は、まず、単量体(a11)または(a12)を合成する。
単量体(a11)または(a12)を合成する方法としては、例えば、無機金属化合物(好ましくは、銅または亜鉛の酸化物、水酸化物、塩化物等)と、メタクリル酸、アクリル酸等の有機酸またはそのエステル化物とを、有機溶剤および水の存在下、無機金属化合物の分解温度以下で加熱し、撹拌する等の公知の方法が挙げられる。より具体的には、まず、有機溶剤と酸化亜鉛等の無機金属化合物とを混合した混合液を撹拌しながら50~80℃程度に加温し、そこに、メタクリル酸やアクリル酸等の有機酸またはそのエステル化物、および水等を含む混合液を滴下し、さらに撹拌する方法が挙げられる。
重合開始剤の使用量は、良好な防汚性を有し、補修性に優れる防汚塗膜を容易に得ることができる等の点から、単量体(a1)~(a4)の合計100質量部に対して、好ましくは2質量部以上、より好ましくは9質量部以上であり、好ましくは20質量部以下、より好ましくは18質量部以下である。TBPOを含む場合その使用量は、単量体(a1)~(a4)の合計100質量部に対して、好ましくは1~5質量部である。
連鎖移動剤を用いる場合、その使用量は、単量体(a1)~(a4)の合計100質量部に対して、好ましくは0.1~5質量部である。
本組成物は、酸化亜鉛(B)を含有する。
該酸化亜鉛(B)の形状、平均粒径等は特に制限されず、本組成物は、形状や平均粒径等が異なる酸化亜鉛を2種以上含んでいてもよい。
本組成物が酸化亜鉛(B)を含有することで、十分な防汚性を有し、耐水性や耐ダメージ性に優れる防汚塗膜を容易に得ることができる。
なお、本明細書において、平均粒径(メディアン径)は、SALD-2200((株)島津製作所製)を用いてレーザー回析散乱法にて測定される値である。
本組成物は必要に応じて、前記(A)および(B)に加え、前記(A)および(B)以外のその他の任意成分、例えば、防汚剤(C)、その他顔料(D)、モノカルボン酸化合物(E)、消泡剤(F)、溶剤(G)、タレ止め剤・沈降防止剤(H)、可塑剤(I)、その他バインダー成分(J)、湿潤分散剤(K)、脱水剤(L)を含有していてもよい。
本組成物から形成された防汚塗膜の防汚性を向上させるため、本組成物は、防汚剤(C)をさらに含有することが好ましい。
本組成物が防汚剤(C)を含有する場合、本組成物中の防汚剤(C)は、1種でも、2種以上でもよい。
本組成物は、酸化亜鉛(B)を必須成分とするため、さらにメデトミジンを含有すると、亜鉛-メデトミジン間の相互作用によると推定される寄与により、耐フジツボ性がより長期にわたって優れる防汚塗膜を容易に得ることができる。
また、本組成物は、メデトミジンの一部または全部として、イミダゾリウム塩や金属等への付加体を使用してもよい。この場合、本組成物を調製する際の原料として、イミダゾリウム塩や金属等への付加体を用いてもよく、本組成物または防汚塗膜中で、イミダゾリウム塩や金属等への付加体を形成してもよい。
本組成物が金属ピリチオン類を含有する場合、その含有量は、十分な防汚性を有する防汚塗膜を容易に得ることができる等の点から、本組成物の固形分100質量%に対し、好ましくは1質量%以上、より好ましくは3質量%以上であり、好ましくは20質量%以下、より好ましくは15質量%以下である。
本組成物は、例えば、塗膜への着色や下地の隠ぺいを目的として、また、適度な塗膜強度に調整することを目的として、酸化亜鉛(B)や防汚剤(C)以外のその他顔料(D)を含有していてもよい。
本組成物がその他顔料(D)を含有する場合、本組成物中のその他顔料(D)は、1種でも、2種以上でもよい。
本組成物は、モノカルボン酸化合物(E)を含有していてもよい。本組成物が該化合物(E)を含有する場合、形成される防汚塗膜の水中における表面からの更新性を向上させ、また、その防汚塗膜が防汚剤を含む場合には、防汚剤の水中への放出を促進することで防汚塗膜の防汚性を高めることができ、防汚塗膜に適度な耐水性を付与する機能も有し、さらに防汚塗料組成物の塗装作業性も良好になる傾向にある。
本組成物が化合物(E)を含有する場合、本組成物中の化合物(E)は、1種でも、2種以上でもよい。
本組成物は、消泡剤(F)を含有していてもよい。消泡剤としては、例えば、形成されようとする泡の表面を不均一にし、泡の形成を抑える作用を有する剤や、形成された泡の表面を局部的に薄くし、泡を破る作用を有する剤が挙げられる。本組成物が消泡剤を含有する場合、塗膜形成時の発泡に起因する塗膜形状の平滑性阻害を抑制することができる。
本組成物が消泡剤(F)を含有する場合、本組成物中の消泡剤(F)は、1種でも、2種以上でもよい。
シリコーン系消泡剤としては、例えば、界面活性を有するポリシロキサンまたはその変性物を含む消泡剤が挙げられ、非シリコーン系消泡剤としては、シリコーン系消泡剤以外の消泡剤(ポリシロキサンまたはその変性物を含まない消泡剤)が挙げられる。
非シリコーン系消泡剤としては、例えば、高級アルコール系、高級アルコール誘導体系、脂肪酸系、脂肪酸誘導体系、パラフィン系、ポリマー系(例:(メタ)アクリル重合体系)、ミネラルオイル系等の消泡剤が挙げられる。
なお、フッ素変性シリコーン系消泡剤とは、フッ素変性されたポリシロキサン構造を有する消泡剤である。
フッ素変性シリコーン系消泡剤の市販品としては、例えば、ビックケミー・ジャパン(株)製の「BYK-066N」、信越化学工業(株)製の「FA-630」等のフルオロシリコーンオイル系消泡剤が挙げられる。
フッ素変性シリコーン系消泡剤以外のシリコーン系消泡剤の市販品としては、例えば、信越化学工業(株)製の「KF-96」、ビックケミー・ジャパン(株)製の「BYK-081」等のシリコーンオイル系消泡剤が挙げられる。
非シリコーン系消泡剤の市販品としては、例えば、ビックケミー・ジャパン(株)製の「BYK-030」等のミネラルオイル系消泡剤;楠本化成(株)製の「ディスパロンOX68」、ビックケミー・ジャパン(株)製の「BYK-1790」等のポリマー系消泡剤が挙げられる。
なお、例えば、本組成物を調製する際に用いる消泡剤(F)として、固形分がa%の消泡剤を、共重合体(A)100質量部に対し、b質量部用いる場合、前記消泡剤(F)の「有姿での含有量」は、b質量部となる。
本組成物は、該組成物の粘度を調整すること等を目的として、必要に応じて、水または有機溶剤等の溶剤(G)を含有していてもよい。なお、本組成物は、例えば、前記共重合体(A)を合成する際に得られた共重合体(A)を含む液体をそのまま用いてもよい。この場合、溶剤(G)としては、該液体に含まれる溶剤や、共重合体(A)と必要に応じてその他任意成分とを混合する際に、別途添加される溶剤等が挙げられる。溶剤(G)としては、有機溶剤が好ましい。
本組成物が溶剤(G)を含有する場合、本組成物中の溶剤(G)は、1種でも、2種以上でもよい。
本組成物は、該組成物の粘度を調整すること等を目的として、タレ止め剤・沈降防止剤(H)を含有していてもよい。
本組成物がタレ止め剤・沈降防止剤(H)を含有する場合、本組成物中のタレ止め剤・沈降防止剤(H)は、1種でも、2種以上でもよい。
本組成物は、防汚塗膜に可塑性を付与すること等を目的として、可塑剤(I)を含有していてもよい。
本組成物が可塑剤(I)を含有する場合、本組成物中の可塑剤(I)は、1種でも、2種以上でもよい。
本組成物は、形成される防汚塗膜に耐水性、耐クラック性や強度を付与する等の目的から、前記共重合体(A)以外のその他バインダー成分(J)を含有していてもよい。
本組成物が成分(J)を含有する場合、本組成物中の成分(J)は、1種でも、2種以上でもよい。
これらの多価アルコールは2種以上を用いてもよい。
なお、ポリエステル系重合体を前記反応により得る場合、ポリエステル系重合体溶液には、未反応の原料が含まれていてもよい。
このような塩素化パラフィンを用いることで、クラック(割れ)やハガレ等の少ない防汚塗膜を容易に形成することができる。なお、平均炭素数が8個未満であると、形成される防汚塗膜のクラックの発生を抑制する効果が不足する場合があり、一方で、平均炭素数が30個を超えると、形成される防汚塗膜の加水分解性(塗膜消耗度、更新性、研掃性)が過度に小さくなり、結果として防汚性が劣ってしまう場合がある。
防汚塗料組成物中の酸化亜鉛(B)、防汚剤(C)やその他の顔料(D)などの分散性の向上等を目的として、本組成物は湿潤分散剤(K)を含有していてもよい。
本組成物が湿潤分散剤(K)を含有する場合、本組成物中の湿潤分散剤(K)は、1種でも、2種以上でもよい。
本組成物は、その貯蔵安定性を向上させる等の目的から、脱水剤(L)を含有していてもよい。
本組成物が脱水剤(L)を含有する場合、本組成物中の脱水剤(L)は、1種でも、2種以上でもよい。
本組成物は、公知の一般的な防汚塗料組成物を調製する際に用いるのと同様の装置、方法等を用いて調製することができる。
具体的には、共重合体(A)を合成した後、得られた共重合体(A)(の溶液)と、酸化亜鉛(B)と、必要に応じてその他任意成分とを、一度にまたは順次容器に添加して、撹拌、混合することで調製することができる。なお、この際には、共重合体(A)と酸化亜鉛(B)とを、先に接触させることが好ましい。
本組成物の溶剤可溶分の酸価は、塗膜消耗度を抑制しながらも、長期にわたる防汚性を有し、かつ、耐水性にも優れる防汚塗膜を容易に得ることができる等の点から、好ましくは30mgKOH/g以上、より好ましくは40mgKOH/g以上であり、好ましくは95mgKOH/g以下、より好ましくは90mgKOH/g以下である。
(1)秤量した本組成物とその約10倍となる質量のキシレン/エタノール混合溶液を遠沈管にとり十分に混合する。
(2)0℃、3,500rpmの条件にて遠心分離を30分間行った後、上澄みを抜き取って別の容器に移す。
(3)抽出残渣に再度(1)と同量のキシレン/エタノール混合溶液を加えて混合し、(2)と同条件で遠心分離を行い、上澄みを抜き取って1回目の上澄みを入れた容器に加える。この操作を更にもう1回繰り返す。
(4)前記3回の遠心分離で得られた上澄みの合計を抽出液とし、この抽出液の固形分質量%を測定する。固形分質量%は、抽出液から一部を秤量し、秤量した抽出液を108℃の熱風乾燥機中で3時間乾燥させて残存した固形分の質量を測定し、秤量した抽出液中の固形分質量の割合を算出する。
(5)前記抽出液のうち、約5g程度をビーカーに入れ、該抽出液の質量を測定し、前記(4)で得た固形分質量%の値を用いて、該抽出液中のサンプルとなる溶剤可溶分の質量を計算してその値をxとする。該抽出液をエタノールにて全体が50mLとなるように希釈する。
(6)前記(5)で作製した抽出液のエタノール希釈溶液、および、ブランクとしてのエタノール50mLに対して、0.1mol/L水酸化カリウム溶液(アルコール性)(N/10)(関東化学(株)製)を用いて、20℃にて電位差滴定を行い、以下の式から酸価AVを算出する。
x:サンプルの質量(g)
VX:エタノール希釈溶液に対する滴定値(ml)
V0:ブランクに対する滴定値(ml)
f:滴定に用いた0.1mol/L水酸化カリウム溶液のファクター
電位差滴定には、平沼自動滴定装置COM-1750(平沼産業(株)製)を用いる。
本発明の一実施形態に係る防汚塗膜(以下「本塗膜」ともいう。)は、前記本組成物から形成され、通常、本組成物を乾燥させることで得ることができる。該本塗膜は、通常、基材上に形成され、基材と、本塗膜とを有する本塗膜付き基材として使用される。
本塗膜付き基材の製造方法の好適例としては、本組成物を基材の少なくとも一部に設け、次いで乾燥する工程を含む方法が挙げられる。
また、本発明の一実施形態に係る基材の防汚方法は、基材の少なくとも一部に本塗膜を形成する工程を含む。前記本塗膜付き基材の製造方法は、基材の少なくとも一部に本塗膜を形成する工程を含むため、基材の防汚方法であるともいえる。
前記塗装する方法としては、刷毛、ローラー、スプレーを用いる方法等の公知の方法が挙げられる。
工程(I’)は特に制限されず、例えば、前記本組成物を基材の少なくとも一部に設ける方法において、基材の代わりに、必要により離型処理された支持体を用いる方法が挙げられる。
工程(II’)も特に制限されず、例えば、特開2013-129724号公報に記載の方法が挙げられる。
本発明の一実施形態に係る防汚塗膜付き基材の補修方法は、本塗膜付き基材に、好ましくは劣化した本塗膜付き基材に、補修用塗料を塗装する工程を含む。具体的には、本塗膜付き基材を使用することにより、劣化した本塗膜付き基材を補修する方法として、該劣化した本塗膜付き基材に、補修用塗料を塗装する工程を含む。
この場合、劣化した本塗膜付き基材を水洗などにより表面の汚れ等を除き、乾燥させた後、補修用塗料を塗装してもよい。
つまり、前記防汚塗膜付き基材の補修方法は、具体的には、防汚塗膜の補修方法であってもよく、防食塗膜や中塗り塗膜などの補修方法であってもよく、これら両方を含む補修方法であってもよい。従って、この防汚塗膜付き基材の補修方法に用いる補修用塗料としては、補修の対象に応じて適宜選択して用いればよく、防汚塗料を用いてもよく、防食塗料や中塗り塗料を用いてもよく、防食塗料や中塗り塗料を用いた後に防汚塗料を用いてもよい。この場合の防汚塗料としては、本組成物を用いることが好ましい。
前記補修用塗料としては、本発明の効果がより発揮される等の点から、バインダー塗料が好ましい。
前記バインダー塗料には、前記樹脂のほか、熱可塑性樹脂、可塑剤、無機充填剤、着色顔料、防錆剤、有機溶剤、硬化促進剤、タレ止め剤、沈降防止剤等の公知の添加剤をさらに配合してもよい。
エポキシ樹脂としては、ビスフェノール型、ノボラック型、脂肪族型等が挙げられ、施工性や防錆性の観点から、ビスフェノール型エポキシ樹脂が好ましい。
アミン系硬化剤が配合されたエポキシ系塗料は、常温で硬化させることができるため、常温環境下で施工されるような用途に好ましい。
このようなケチミンタイプの硬化剤として、具体的には、ケチミンタイプの変性脂環式ポリアミンである、エアープロダクツジャパン(株)製「アンカミン MCA」等が挙げられる。
また、アミン系硬化剤の使用量は、エポキシ系塗料中のエポキシ樹脂100質量部に対して、好ましくは10質量部以上、より好ましくは20質量部以上であり、好ましくは80質量部以下、より好ましくは70質量部以下である。
なお、本明細書における各成分または本組成物の「固形分」とは、各成分または本組成物に溶剤として含まれる揮発成分を除いた成分を指し、各成分または本組成物を108℃の熱風乾燥機中で3時間乾燥させて得られたものと同義である。
・製造例M1:金属エステル基含有単量体混合物の製造
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、PGM(プロピレングリコールモノメチルエーテル) 85.4部および酸化亜鉛 40.7部を仕込み、撹拌しながら75℃に昇温した。続いて、滴下ロートから、メタクリル酸 43.1部、アクリル酸 36.1部および水 5部からなる混合物を3時間かけて等速滴下した。さらに、2時間撹拌した後、PGM 36部を添加して透明な金属エステル基含有単量体混合物M1を得た。該混合物M1中の固形分は44.8質量%であった。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 56部およびエチルアクリレート(EA) 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート(BA)12.5部、メチルメタクリレート(MMA)30.2部、エチルアクリレート23.2部、2-メトキシエチルアクリレート(2-MEA)6部、X-22-174ASX(商品名、信越化学工業(株)製) 10部、製造例M1で得られた金属エステル基含有単量体混合物M1 31.3部、キシレン 10部、ノフマーMSD(商品名、日油(株)製、連鎖移動剤、α-メチルスチレンダイマー) 0.8部、AIBN 1部およびAMBN 8部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にtert-ブチルパーオキシオクトエート(TBPO) 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 7.5部を添加して、固形分48.4%、ガードナー粘度LMの無色透明な加水分解性共重合体溶液(A-1)を得た。
なお、以下の実施例におけるガードナー粘度は、ガードナー泡粘度計を用い、25℃で測定した結果である。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 56部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 7.5部、メチルメタクリレート 26.4部、エチルアクリレート 38部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 31.3部、キシレン 10部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 8部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 7.5部を添加して、固形分48.8%、ガードナー粘度Hの無色透明な加水分解性共重合体溶液(A-2)を得た。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 56部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 17.5部、メチルメタクリレート 29.4部、エチルアクリレート 25部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 31.3部、キシレン 10部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 8部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 7.5部を添加して、固形分48.5%、ガードナー粘度IJの無色透明な加水分解性共重合体溶液(A-3)を得た。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 56部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 7.5部、メチルメタクリレート 37部、エチルアクリレート 32部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 21.5部、キシレン 10部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 8部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 13部を添加して、固形分48.5%、ガードナー粘度BCの無色透明な加水分解性共重合体溶液(A-4)を得た。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 36部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 7.5部、メチルメタクリレート 21部、エチルアクリレート 30.9部、シクロヘキシルメタクリレート(CHMA) 12.5部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 31.3部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 10部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 13.5部を添加して、固形分54.2%、ガードナー粘度+Xの無色透明な加水分解性共重合体溶液(A-5)を得た。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 36部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 7.5部、メチルメタクリレート 18.1部、エチルアクリレート 31.9部、シクロヘキシルメタクリレート 12.5部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 35.6部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 10部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 11.1部を添加して、固形分54.8%、ガードナー粘度+Z2の無色透明な加水分解性共重合体溶液(A-6)を得た。
冷却器、温度計、滴下ロートおよび攪拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 36部およびエチルアクリレート 3部を仕込み、加圧下、撹拌しながら150℃に昇温した。続いて、滴下ロートから、メチルメタクリレート 30.2部、エチルアクリレート 24.2部、n-ブチルアクリレート 12.5部、2-メトキシエチルアクリレート 6部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 31.3部、ノフマーMSD 0.5部、AIBN 1部およびAMBN 3.5部からなるからなる透明な混合物を4時間かけて等速滴下した。滴下終了後に、105℃でTBPO 2部とキシレン 10.4部とを90分かけて滴下し、さらに60分撹拌した後、キシレン 10.1部を添加することで得られた混合物を、300メッシュを用いてろ過することで、固形分55.0%、ガードナー粘度GHの不溶解物のない淡黄色透明な加水分解性共重合体溶液(A-7)を得た。300メッシュ上に濾過残渣は見られなかった。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 56部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 12.5部、メチルメタクリレート 33.7部、エチルアクリレート 21.5部、2-メトキシエチルアクリレート6部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 26.1部、キシレン 10部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 8部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 10.5部を添加して、固形分49.0%、ガードナー粘度EFの無色透明な加水分解性共重合体溶液(A-8)を得た。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 56部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、n-ブチルアクリレート 17.5部、メチルメタクリレート 29.1部、エチルアクリレート 15.3部、X-22-174ASX 20部、金属エステル基含有単量体混合物M1 31.3部、キシレン 10部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 8部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 7部とを90分かけて滴下し、更に60分撹拌した後、キシレン 7.5部を添加して、固形分48.7%、ガードナー粘度EFの無色透明な加水分解性共重合体溶液(A-9)を得た。
冷却器、温度計、滴下ロートおよび撹拌機を備えた四つ口フラスコに、n-ブタノール 15部、キシレン 79部およびエチルアクリレート 4部を仕込み、撹拌しながら100℃に昇温した。続いて、滴下ロートから、メチルメタクリレート 23.4部、エチルアクリレート 48部、X-22-174ASX 10部、金属エステル基含有単量体混合物M1 31.3部、キシレン 30部、ノフマーMSD 0.8部、AIBN 1部およびAMBN 2部からなる透明な混合物を6時間かけて等速滴下した。滴下終了後にTBPO 2部とキシレン 14部とを90分かけて滴下し、更に60分撹拌した後、キシレン 22.5部を添加して、固形分37.3%、ガードナー粘度STの無色透明な加水分解性共重合体溶液(A-10)を得た。
得られた加水分解性共重合体溶液(A-1)~(A-10)に含まれる共重合体のMnおよびMwを、下記条件でGPC(ゲルパーミエーションクロマトグラフィー)を用いて測定した。結果を表1に示す。
カラム:「TSKgel G4000HXL*G2000HXL」(東ソー(株)製、サイズ7.8mmID×30cmL)
溶離液:THF(1mmolクエン酸)
流速:1.000ml/min
検出器:RI
カラム恒温槽温度:40℃
標準物質:ポリスチレン
サンプル調製法:各製造例で調製された共重合体溶液に、1mmolのクエン酸入りTHF(テトラヒドロフラン)を加えて共重合体の固形分濃度が0.4wt%になるよう希釈後、メンブレンフィルターで濾過して得られた濾物をGPC測定サンプルとした。
表3に記載の量(質量部)で、各成分を混合撹拌することで、防汚塗料組成物を調製した。なお、表3に記載の各成分の配合量は、有姿での配合量を示している。例えば、実施例1における、脂肪酸アマイドの有姿での(全体としての)配合量は1.5質量部であり、固形分は20質量%であるので、脂肪酸アマイド自身の配合量は、0.3質量部である。
前記実施例および比較例で得られた防汚塗料組成物の溶剤可溶分の酸価を、前述の方法により測定した。結果を表3に示す。
前記実施例および比較例で得られた防汚塗料組成物の粘度を、ストーマー粘度計により測定した。結果を表3に示す。
サンドブラスト処理鋼板(縦100mm×横70mm×厚み2.3mm)に、エポキシ系防錆塗料(エポキシAC塗料、商品名「バンノー500」、中国塗料(株)製)を、その乾燥膜厚が約100μmとなるように塗布し、1日乾燥させた後、その上に、エポキシ系バインダー塗料(商品名「バンノー500N」、中国塗料(株)製)を、その乾燥膜厚が約100μmとなるように塗布し、1日乾燥させた。さらにその上に、前記実施例または比較例で得られた防汚塗料組成物を、その乾燥膜厚が約200μmとなるように塗布し、25℃条件下で7日間乾燥させて、防汚試験板を作製した。
5:防汚試験板面における、水生生物に占有されている面積の合計が全体の1%未満
4:同上面積が全体の1%以上10%未満
3:同上面積が全体の10%以上30%未満
2:同上面積が全体の30%以上70%未満
1:同上面積が全体の70%以上
塩ビ板各2枚に、前記実施例または比較例で得られた防汚塗料組成物を、その乾燥膜厚が約200μmとなるように帯状に塗布し、25℃で7日間乾燥させて、防汚塗膜付き試験板を作製した。防汚塗膜の厚みはレーザー膜厚計により計測した。
前述のように作製した2枚の防汚塗膜付き試験板それぞれを、回転ローターに取付け、一定の換水を行いながら温度を15℃または25℃に調整した海水水槽の中に浸漬し、試験板表面の速度が約15ktとなるように回転させ、回転開始から6カ月後に再度レーザー膜厚計により防汚塗膜の厚みを計測した。減少した防汚塗膜の厚みをそれぞれ6で除した数値を、15℃の海水に浸漬した試験板および25℃の海水に浸漬した試験板それぞれについて計算し、それらを平均した数値を塗膜消耗度とした。結果を表3に示す。
サンドブラスト処理鋼板(縦150mm×横70mm×厚み1.6mm)に、エポキシ系防錆塗料(エポキシAC塗料、商品名「バンノー500」、中国塗料(株)製)を、その乾燥膜厚が約100μmとなるように塗布し、1日乾燥させた後、その上に、エポキシ系バインダー塗料(商品名「バンノー500N」、中国塗料(株)製)を、その乾燥膜厚が約100μmとなるように塗布し、1日乾燥させた。さらにその上に、前記実施例または比較例で得られた防汚塗料組成物を、その乾燥膜厚が約400μmとなるように塗布し、25℃条件下で7日間乾燥させて、防汚試験板を作製した。
乾燥後の試験板に、JIS K 5600-5-3:1999の6.デュポン式に対応する方法において、落下高さ20cmから300gのおもりを落下させた後の塗膜面の損傷を目視により、下記〔耐ダメージ性の評価基準〕に従って評価した。結果を表3に示す。
5:塗膜面に割れ、剥がれが生じない
4:落下したおもりの中心からの塗膜面の剥がれが生じた長さが平均10mm未満
3:同上長さが平均10mm以上20mm未満
2:同上長さが平均20mm以上30mm未満
1:同上長さが平均30mm以上
サンドブラスト処理鋼板(縦300mm×横100mm×厚み2.3mm)に、エポキシ系防錆塗料(エポキシAC塗料、商品名「バンノー500」、中国塗料(株)製)を、その乾燥膜厚が約100μmとなるように塗布し、1日乾燥させた後、その上に、エポキシ系バインダー塗料(商品名「バンノー500N」、中国塗料(株)製)を、その乾燥膜厚が約100μmとなるように塗布し、1日乾燥させた。さらにその上に、前記実施例または比較例で得られた防汚塗料組成物を、その乾燥膜厚が約400μmとなるように塗布し、25℃条件下で7日間乾燥させて、防汚試験板を作製した。
5:カットしたマス内の剥がれが生じた面積がカットしたマス全体の面積(以下「全体」という。)1%未満である
4:剥がれが生じた面積が全体の1%以上10%未満である
3:剥がれが生じた面積が全体の10%以上30%未満である
2:剥がれが生じた面積が全体の30%以上70%未満である
1:剥がれが生じた面積が全体の70%以上である
表5に記載の量(質量部)で、各成分を混合撹拌することで、防汚塗料組成物を調製した。なお、表5に記載の各成分の配合量は、有姿での配合量を示している。
調製した防汚塗料組成物を用い、前記と同様にして、溶剤可溶分の酸価および塗料粘度を測定し、防汚性(動的6カ月)、塗膜消耗度、耐ダメージ性およびバインダー補修性を評価した。結果を表5に示す。
表6に記載の量(質量部)で、各成分を混合撹拌することで、防汚塗料組成物を調製した。なお、表6に記載の各成分の配合量は、有姿での配合量を示している。
調製した防汚塗料組成物を用い、前記と同様にして、溶剤可溶分の酸価および塗料粘度を測定し、防汚性(静置6カ月、動的6カ月、動的12カ月)、塗膜消耗度、耐ダメージ性およびバインダー補修性を評価した。結果を表6に示す。
Claims (10)
- オルガノシロキサンブロックおよび金属エステル基を含有する加水分解性共重合体(A)と、酸化亜鉛(B)とを含有し、
該共重合体(A)が、
金属エステル基含有単量体(a1)に由来する構成単位を5~25質量%、
下記式(2)で表されるオルガノシロキサンブロック含有単量体(a2)に由来する構成単位を5~15質量%、および、
下記式(3)で表される単量体(a3)に由来する構成単位を含み、
前記共重合体(A)の含有量100質量部に対する前記酸化亜鉛(B)の含有量が70~200質量部である、
防汚塗料組成物。
- 前記単量体(a3)が、前記式(3)中のR42がブチル基である単量体を含む、請求項1または2に記載の防汚塗料組成物。
- 前記共重合体(A)の重量平均分子量が3,000~5,000である、請求項1~3のいずれか一項に記載の防汚塗料組成物。
- 溶剤可溶分酸価が30~95mgKOH/gである、請求項1~4のいずれか一項に記載の防汚塗料組成物。
- 請求項1~5のいずれか一項に記載の防汚塗料組成物から形成された防汚塗膜。
- 基材と、請求項6に記載の防汚塗膜とを有する、防汚塗膜付き基材。
- 請求項1~5のいずれか一項に記載の防汚塗料組成物を基材の少なくとも一部に設け、次いで乾燥する工程を含む、防汚塗膜付き基材の製造方法。
- 基材の少なくとも一部に請求項6に記載の防汚塗膜を形成する工程を含む、基材の防汚方法。
- 請求項7に記載の防汚塗膜付き基材に、補修用塗料を塗装する工程を含む、防汚塗膜付き基材の補修方法。
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