WO2022224785A1 - 防汚塗料組成物 - Google Patents
防汚塗料組成物 Download PDFInfo
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- WO2022224785A1 WO2022224785A1 PCT/JP2022/016328 JP2022016328W WO2022224785A1 WO 2022224785 A1 WO2022224785 A1 WO 2022224785A1 JP 2022016328 W JP2022016328 W JP 2022016328W WO 2022224785 A1 WO2022224785 A1 WO 2022224785A1
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- WIPO (PCT)
- Prior art keywords
- monomer
- meth
- acrylate
- copolymer
- ethyl
- Prior art date
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- 230000003373 anti-fouling effect Effects 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- 239000011248 coating agent Substances 0.000 title abstract description 52
- 238000000576 coating method Methods 0.000 title abstract description 52
- 239000000463 material Substances 0.000 title abstract description 5
- 239000000178 monomer Substances 0.000 claims abstract description 107
- 229920000642 polymer Polymers 0.000 claims abstract description 34
- 229920001577 copolymer Polymers 0.000 claims abstract description 33
- 239000002519 antifouling agent Substances 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
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- 238000005192 partition Methods 0.000 claims abstract description 6
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 15
- 239000008199 coating composition Substances 0.000 claims description 13
- 239000003973 paint Substances 0.000 claims description 12
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
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- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 239000013535 sea water Substances 0.000 abstract description 8
- 230000005856 abnormality Effects 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract description 4
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- 238000005336 cracking Methods 0.000 abstract 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 99
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- 238000004519 manufacturing process Methods 0.000 description 43
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 24
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 24
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- 239000008096 xylene Substances 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
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- 238000010438 heat treatment Methods 0.000 description 8
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- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 7
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- 238000006116 polymerization reaction Methods 0.000 description 7
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- 230000000052 comparative effect Effects 0.000 description 6
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- 241000195493 Cryptophyta Species 0.000 description 4
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- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 4
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 4
- 229940112669 cuprous oxide Drugs 0.000 description 4
- 238000005227 gel permeation chromatography Methods 0.000 description 4
- CUHVIMMYOGQXCV-UHFFFAOYSA-N medetomidine Chemical compound C=1C=CC(C)=C(C)C=1C(C)C1=CNC=N1 CUHVIMMYOGQXCV-UHFFFAOYSA-N 0.000 description 4
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- 235000015170 shellfish Nutrition 0.000 description 4
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- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
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- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 description 3
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Classifications
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- 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
- C09D5/1668—Vinyl-type polymers
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- 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
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/283—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing one or more carboxylic moiety in the chain, e.g. acetoacetoxyethyl(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
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of 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 a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of 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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of 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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- 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
- 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
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
Definitions
- the present invention relates to an antifouling paint composition.
- Aquatic fouling organisms such as barnacles, serpra, mussels, mussels, sea squirts, green laver, sea lettuce, and slimes may be found on ships (especially on the bottom of ships), fishing nets, fishing tools such as fishing net accessories, and underwater structures such as power plant water pipes.
- problems such as the deterioration of the functions of the ships and the like and the deterioration of the appearance due to the adhesion.
- an antifouling coating composition is applied to a ship or the like to form an antifouling coating film, and an antifouling agent is slowly released from the antifouling coating film, thereby providing long-term antifouling.
- Techniques for exhibiting performance are known (Patent Documents 1 to 4).
- the antifouling coating film composed of a polymer containing a (meth)acrylic acid alkoxycarbonylmethyl ester group described in Patent Documents 1 to 4 has remarkably low coating film solubility, and therefore exhibits antifouling properties over a long period of time. It was difficult to demonstrate.
- a technique has been proposed in which the coating film dissolves over a long period of time to exhibit antifouling performance (Patent Document 5).
- the antifouling coating film made of the antifouling coating composition described in Patent Document 5 has improved coating film solubility, etc., but after a long period of time after immersion in seawater, the coating film surface becomes slimy to the extent that it cannot be seen. In some cases, the coating film adheres thickly and cannot be removed by wiping, and in some cases, coating film abnormalities such as cracks may occur, and further improvement is required.
- the present invention has been made in view of the above circumstances. To provide an antifouling paint composition capable of maintaining antifouling performance.
- an antifouling coating composition containing a copolymer A, a polymer B and an antifouling agent D, wherein the copolymer A is a monomer represented by the general formula (1) (a) and a copolymer of an ethylenically unsaturated monomer (b) other than the monomer (a), wherein the monomer (a) is the general formula (1) where n is 2 or more, and the polymer B contains at least one monomer (b1) having a common logarithm logP of n-octanol/water partition coefficient P of 0.8 or less.
- Ethylenically unsaturated An antifouling coating composition is provided which is a polymer of monomer (b).
- the antifouling paint composition of the present invention contains the copolymer A, the polymer B and the antifouling agent D.
- Copolymer A is a copolymer of a monomer (a) and an ethylenically unsaturated monomer (b) other than the monomer (a), and the monomer (a) and the monomer Including monomeric units derived from mer (b).
- the content of the monomer (a) with respect to the sum of the monomers (a) and (b) is preferably 10-90% by mass, more preferably 20-70% by mass. Specifically, for example, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90% by mass, and the numerical values exemplified here It may be in the range between any two. In this case, the coating film solubility is particularly good.
- Monomer (a) is represented by general formula (1).
- R 1 represents hydrogen or a methyl group
- R 2 represents hydrogen, a methyl group, or a phenyl group
- R 3 represents a carbon atom optionally substituted with an alkoxy group having 1 to 8 carbon atoms or a phenyl group. It is an alkyl group of numbers 1-8 or represents a phenyl group, and n represents an integer of 1-10.
- R 2 is preferably hydrogen or a methyl group.
- the number of carbon atoms in the alkoxy group or alkyl group of R 3 is, for example, 1, 2, 3, 4, 5, 6, 7, or 8, and within the range between any two of the numerical values exemplified here good too.
- R 3 is, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, t-butyl group, 2-ethylhexyl group, cyclohexyl group, benzyl group, phenyl group, 2-methoxyethyl group, 4-methoxybutyl group, vinyl group or allyl group, preferably methyl group, ethyl group, isopropyl group or n-butyl group.
- n represents an integer of 1 to 10
- n is, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, any two of the numerical values exemplified here may be within the range.
- the monomer (a) includes compounds in which n in general formula (1) is 2 or more. When a compound in which n is 2 or more is included as the monomer (a), the coating film solubility is increased.
- the monomer (a) may be composed only of a compound in which n is 2 or more, or may be a mixture of a compound in which n is 1 and a compound in which n is 2 or more.
- the monomer (a) preferably consists of a monomer (a1) and a monomer (a2).
- the content of monomer (a1) in monomer (a) is preferably 50 to 80% by mass, more preferably 55 to 75% by mass, particularly preferably 60 to 70% by mass.
- the monomer (a1) has the property of increasing the coating film strength and lowering the coating film solubility as compared with the monomer (a2). Therefore, if the content of the monomer (a1) is too small, the strength of the coating film tends to be low, and the surface condition of the coating film tends to deteriorate after a long period of time. On the other hand, if the content of the monomer (a1) is too high, the solubility of the coating film becomes low, and the antifouling performance may deteriorate.
- Monomer (a1) is a compound in which n is 1 in general formula (1).
- Examples of the monomer (a1) include methoxycarbonylmethyl (meth)acrylate, ethoxycarbonylmethyl (meth)acrylate, isopropoxycarbonylmethyl (meth)acrylate, n-propoxycarbonylmethyl (meth)acrylate, n-butoxycarbonylmethyl (meth)acrylate, t-butoxycarbonylmethyl (meth)acrylate, 2-ethylhexyloxycarbonylmethyl (meth)acrylate, cyclohexyloxycarbonylmethyl (meth)acrylate, benzyl (meth)acrylate Oxycarbonylmethyl, phenoxycarbonylmethyl (meth)acrylate, 2-methoxyethoxycarbonylmethyl (meth)acrylate, 4-methoxybutoxycarbonylmethyl (meth)acrylate, allyloxycarbonylmethyl (meth)acrylate, (meth)
- the monomer (a2) is a compound of general formula (1) in which n is 2 or more.
- n in formula (1) is preferably 2 to 6 from the viewpoint of long-term antifouling properties.
- the monomer (a2) preferably contains both a compound in which n is 2 and a compound in which n is 3 or more.
- the mass ratio (n(2)/n(2-10)) in terms of solid content is preferably 0.4 to 0.8, more preferably 0.5 to 0.7.
- this value is, for example, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, where It may be in a range between any two of the numerical values given.
- Examples of the monomer (a2) include methyl (meth)acrylate di(oxycarbonylmethyl), ethyl (meth)acrylate di(oxycarbonylmethyl), isopropyl(meth)acrylate di(oxycarbonylmethyl), (meth)acrylate ) n-propyl di(oxycarbonylmethyl) acrylate, n-butyl di(oxycarbonylmethyl) acrylate (meth), t-butyl di(oxycarbonylmethyl) acrylate (meth), 2-ethylhexyl di(meth) acrylate ( oxycarbonylmethyl), cyclohexyl di(oxycarbonylmethyl) (meth)acrylate, benzyl di(oxycarbonylmethyl) (meth)acrylate, phenyl di(oxycarbonylmethyl) (meth)acrylate, 2-methoxy (meth)acrylate Ethyl di (oxycarbonylmethyl), 4-methoxybutyl di (oxycarbonylmethyl) (
- Monomer (b) is an ethylenically unsaturated monomer other than monomer (a). Monomer (b) can be classified into monomer (b1) and monomer (b2).
- the monomer (b1) is an ethylenically unsaturated monomer having a common logarithm logP of the partition coefficient P between n-octanol/water of 0.8 or less.
- the partition coefficient P is the value of the ratio of the distribution concentrations of a substance to each phase of a two-phase solvent system consisting of n-octanol and water
- log P is the common logarithm of the partition coefficient P.
- a smaller logP value means higher hydrophilicity (lower lipophilicity).
- logP means a value calculated based on Crippen's fragmentation method (J.Chem.Inf.Comput.Sci., 27, 21 (1987)). The log P by this method can be calculated using, for example, the PerkinElmer ChemDraw Professional 17.0 program.
- the logP is preferably 0.75 or less, more preferably 0.7 or less, from the viewpoint of stain resistance against slime. Moreover, from the viewpoint of the water resistance of the coating film, it is preferably -0.8 or more.
- logP is, for example, -0.80 to 0.80, specifically, -0.80, -0.75, -0.70, -0.65, -0.60, -0.55 , -0.50, -0.45, -0.40, -0.35, -0.30, -0.25, -0.20, -0.15, -0.10, -0.05 , 0.00, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0 .60, 0.65, 0.70, 0.75, 0.80, and may be in the range between or less than or between any two of the values exemplified herein.
- Examples of the monomer (b1) include methoxypolyethylene glycol (meth)acrylate, N-(2-hydroxyethyl)(meth)acrylamide, 2,3-dihydroxypropyl (meth)acrylate, (meth)acrylamide, acryloylmorpholine, 2-(acetoacetyloxy)ethyl (meth)acrylate, 2-(2-hydroxyethoxy)ethyl (meth)acrylate, 4-(2,3-dihydroxypropoxy)butyl (meth)acrylate, 2-[2-[2-(2-Hydroxyethoxy)ethoxy]ethoxy]ethyl (meth)acrylate, mono(2-(meth)acryloyloxyethyl) succinate, N-(3-dimethylaminopropyl) (meth) ) acrylamide, 2-hydroxyethyl (meth)acrylate, 2-[2-(2-methoxyethoxy]ethyl (meth)acrylate,
- These monomers (b1) can be used individually or in combination of 2 or more types.
- the monomer (b2) is obtained by removing the monomer (b1) from the monomer (b), and includes (meth)acrylic acid esters other than the monomer (b1), vinyl compounds, aromatic compounds, di A dialkyl ester compound of a basic acid and the like are included.
- (meth)acrylic acid ester means acrylic acid ester or methacrylic acid ester.
- Examples of (meth)acrylic acid esters other than the monomer (b1) include 2-methoxyethyl methacrylate, methyl methacrylate, ethyl (meth)acrylate, butyl (meth)acrylate, and isobutyl (meth)acrylate.
- t-butyl (meth)acrylate 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, furfuryl (meth)acrylate, 2-methoxypropyl methacrylate, 3-methoxybutyl (meth)acrylate , benzyl (meth) acrylate, phenyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, propylene glycol monomethyl (meth) acrylate, furfuryl (meth) acrylate and other (meth) acrylic acid esters; (Meth)acrylate silyl esters such as triisopropylsilyl (meth)acrylate, t-butyldiphenylsilyl (meth)acrylate, tri-n-octylsilyl (meth)acrylate and tri-2-ethylhexylsilyl (meth)acrylate class; and the like.
- Examples of the vinyl compound include vinyl compounds having functional groups such as vinyl chloride, vinylidene chloride, acrylonitrile, methacrylonitrile, vinyl benzoate, vinyl neononanoate, vinyl neodecanoate, vinyl butyrate, butyl vinyl ether, and lauryl vinyl ether. mentioned.
- Examples of the aromatic compound include styrene, vinyltoluene, ⁇ -methylstyrene and the like.
- Examples of the dialkyl ester compound of dibasic acid include dibutyl maleate and dimethyl fumarate.
- the weight average molecular weight (Mw) of Copolymer A is preferably 5,000 to 300,000. If the molecular weight is less than 5,000, the coating film of the antifouling paint becomes brittle and easily peels off or cracks. Specifically, this Mw is, for example, 5000, 10000, 20000, 30000, 40000, 50000, 60000, 70000, 80000, 90000, 100000, 200000, 300000. may be within the range.
- Examples of methods for measuring Mw include gel permeation chromatography (GPC method).
- Copolymer A is a monomer (a1), a random copolymer, an alternating copolymer, or a periodic copolymer of a monomer (a2) and a monomer (b1) or a monomer (b2). , or block copolymers.
- Copolymer A can be obtained, for example, by polymerizing monomer (a1), monomer (a2), and monomer (b1) and monomer (b2) in the presence of a polymerization initiator. can be done.
- polymerization initiator examples include 2,2′-azobisisobutyronitrile, 2,2′-azobis(2-methylbutyronitrile), 2,2′-azobis(2,4-dimethylvaleronitrile ), dimethyl-2,2′-azobisisobutyrate, dimethyl 2,2′-azobisisobutyrate, 2,2′-azobis (N-butyl-2-methylpropionamide and other azo compounds; benzoylper oxide, di-tert-butylperoxide, tert-butylperoxybenzoate, tert-butylperoxyisopropylcarbonate, t-butylperoxy-2-ethylhexanoate, t-hexylperoxy-2-ethylhexanoate , di-t-hexyl peroxide, t-butyl peroxy-2-ethylhexyl monocarbonate, di-t-butyl peroxide, 1,1,3,3-tetra
- polymerization initiators can be used alone or in combination of two or more. -methylbutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), dimethyl 2,2'-azobisisobutyrate and 1,1,3,3-tetramethylbutylperoxy-2 - Ethylhexanoate is preferred.By appropriately setting the amount of the polymerization initiator used, the molecular weight of the copolymer A can be adjusted.In addition, a chain transfer agent is used to adjust the molecular weight of the resulting polymer.
- chain transfer agents examples include mercaptans such as n-dodecylmercaptan, thioglycolic acid esters such as octyl thioglycolate, ⁇ -methylstyrene dimer, and terpinolene.
- polymerization methods include solution polymerization, bulk polymerization, emulsion polymerization, suspension polymerization, and non-aqueous dispersion polymerization.
- solution polymerization or non-aqueous dispersion polymerization is particularly preferable in that the copolymer A can be obtained easily and accurately.
- an organic solvent may be used as necessary.
- the organic solvent is not particularly limited, but for example, aromatic hydrocarbon solvents such as xylene and toluene; aliphatic hydrocarbon solvents; ethyl acetate, butyl acetate, isobutyl acetate, methoxypropyl acetate, propylene glycol 1-monomethyl ether.
- ester solvents such as 2-acetate; alcohol solvents such as isopropyl alcohol, butyl alcohol and propylene glycol monomethyl ether; ether solvents such as dioxane, diethyl ether and dibutyl ether; ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone. mentioned. Among them, butyl acetate, isobutyl acetate, butyl alcohol, propylene glycol monomethyl ether, propylene glycol 1-monomethyl ether 2-acetate, toluene and xylene are preferred. These solvents can be used alone or in combination of two or more.
- the reaction temperature in the polymerization reaction may be appropriately set according to the type of the polymerization initiator and the like, and is usually 50 to 160°C, preferably 60 to 150°C.
- the polymerization reaction is preferably carried out in an inert gas atmosphere such as nitrogen gas or argon gas.
- the polymer B is a polymer of an ethylenically unsaturated monomer (b) other than the monomer (a), and the monomer (b) contains one or more monomers ( b1) is included.
- the polymer B may be a monomer polymer containing only the monomer (b1), or a monomer polymer containing the monomer (b1) and the monomer (b2). good too.
- Polymer B may be a homopolymer of one type of monomer or a copolymer of a plurality of types of monomers.
- the content of the monomer (b1) with respect to the sum of the monomer (b1) and the monomer (b2) is 15 to 100% by mass is preferred, and 20 to 100% by mass is more preferred.
- the content of the monomer (b1) is, for example, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 , 100% by weight, and may be within a range between any two of the values exemplified herein. In this case, the antifouling property against slime is particularly good.
- the weight average molecular weight (Mw) of polymer B is desirably 3,000 to 300,000. If the molecular weight is less than 3000, the coating film of the antifouling paint will be brittle and easily peeled off or cracked. Specifically, this Mw is, for example, 3000, 4000, 5000, 10000, 20000, 30000, 40000, 50000, 60000, 70000, 80000, 90000, 100000, 200000, 300000, any of the numerical values illustrated here It may be in a range between the two.
- the content of polymer B in the composition of the present invention is not particularly limited, but the content ratio with copolymer A, in terms of solid content, the mass ratio (polymer B / copolymer A) is usually 0 0.01 to 14.0, preferably 0.05 to 3.0.
- This mass ratio is, for example, 0.01, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 , 1.0, 3.0, 5.0, 10.0, 14.0, and may be in the range between any two of the values exemplified herein.
- Antifouling agent D examples include inorganic agents and organic agents.
- examples of inorganic chemicals include cuprous oxide, copper thiocyanate (common name: rhodan copper), and copper powder.
- cuprous oxide and rhodan copper are particularly preferable, and cuprous oxide surface-treated with glycerin, sucrose, stearic acid, lauric acid, lycithin, mineral oil, etc. is preferred for long-term storage stability. is more preferable.
- organic agents include copper 2-mercaptopyridine-N-oxide (generic name: copper pyrithione), zinc 2-mercaptopyridine-N-oxide (generic name: zinc pyrithione), zinc ethylene bisdithiocarbamate (generic name: Zineb ), 4,5-dichloro-2-n-octyl-3-isothiazolone (generic name: Seanine 211), 3,4-dichlorophenyl-NN-dimethylurea (generic name: diuron), 2-methylthio-4- t-butylamino-6-cyclopropylamino-s-triazine (generic name: Irgalol 1051), 2-(p-chlorophenyl)-3-cyano-4-bromo-5-trifluoromethylpyrrole (generic name: Econea28) , 4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole (gen
- the content of the antifouling agent in the composition of the present invention is not particularly limited, it is usually 0.1 to 60.0% by mass in terms of solid content.
- the content of the antifouling agent is, for example, 0.1, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60% by mass, and may be within a range between any two of the numerical values exemplified here.
- the antifouling paint resin of the present invention may optionally contain a resin component other than the copolymer A and the polymer B, an elution modifier, a plasticizer, a pigment, a dye, an antifoaming agent, and a dehydrating agent.
- An antifouling paint can be prepared by adding an agent, a thixotropic agent, an organic solvent, or the like.
- Dissolution modifiers include, for example, monocarboxylic acids such as rosin, rosin derivatives, naphthenic acid, cycloalkenylcarboxylic acid, bicycloalkenylcarboxylic acid, versatic acid, trimethylisobutenylcyclohexenecarboxylic acid, and metal salts thereof. salts or the above alicyclic hydrocarbon resins. These can be used singly or in combination of two or more.
- the rosin derivative include hydrogenated rosin, disproportionated rosin, maleated rosin, formylated rosin, and polymerized rosin.
- Examples of the alicyclic hydrocarbon resin include commercially available products such as Quinton 1500, 1525L, and 1700 (trade names, manufactured by Nippon Zeon Co., Ltd.). Among these, rosin, rosin derivatives, naphthenic acid, versatic acid, trimethylisobutenylcyclohexenecarboxylic acid, or metal salts thereof are preferred.
- plasticizer examples include phosphates, phthalates, adipates, sebacates, polyesters, epoxidized soybean oil, alkyl vinyl ether polymers, polyalkylene glycols, t-nonylpentasulfide. , vaseline, polybutene, tris(2-ethylhexyl) trimellitate, silicone oil, chlorinated paraffin, and the like. These can be used singly or in combination of two or more.
- dehydrating agents include calcium sulfate, synthetic zeolite adsorbents, orthoesters, silicates such as tetramethoxysilane and tetraethoxysilane, isocyanates, carbodiimides, and carbodiimidazoles. These can be used singly or in combination of two or more.
- the antifouling coating composition of the present invention is prepared by, for example, dispersing a mixed liquid containing copolymer A, polymer B, antifouling agents, other additives, etc. using a disperser. It can be produced by mixing and dispersing.
- the mixed liquid is preferably prepared by dissolving or dispersing various materials such as the copolymer A, the polymer B, and the antifouling agent in a solvent.
- the disperser for example, one that can be used as a fine pulverizer can be suitably used. For example, a commercially available homomixer, sand mill, bead mill, disper, etc. can be used.
- the mixed liquid may be mixed and dispersed using a container equipped with a stirrer to which glass beads or the like for mixing and dispersing are added.
- the antifouling coating composition is used to form an antifouling coating film on the surface of a coating film-forming object.
- the antifouling coating film gradually dissolves from the surface and the coating film surface is constantly renewed, thereby preventing adhesion of aquatic fouling organisms.
- the object to be coated include ships (particularly ship bottoms), fishing tools, underwater structures, and the like.
- the thickness of the antifouling coating film may be set as appropriate according to the type of object to be coated, sailing speed of the ship, seawater temperature, and the like. For example, when the object to be coated is the bottom of a ship, the thickness of the antifouling coating is usually 50-700 ⁇ m, preferably 100-600 ⁇ m.
- % in each Production Example, Example and Comparative Example indicates % by mass.
- the weight average molecular weight (Mw) is a value (polystyrene conversion value) determined by GPC.
- the conditions for GPC are as follows. Apparatus: HLC-8320GPC manufactured by Tosoh Corporation Column: TSKgel SuperHZM-M 2 Flow rate: 0.35 mL/min Detector... RI Column constant temperature bath temperature: 40°C Eluent...
- the heating residue is a value measured in accordance with JIS K 5601-1-2:1999 (ISO 3251:1993) "Coating component test method-heating residue".
- the log P values in Tables 4 to 6 are values obtained using the PerkinElmer ChemDraw Professional 17 Suite program.
- Production Example 1-1 Production Example of Monomer (a1) ⁇ Production Example 1 (Production of Monomer a1-1)> In a four-necked flask equipped with a thermometer, a condenser, a stirrer and a dropping funnel, methyl chloroacetate: 109 g (1.00 mol), acrylic acid: 72 g (1.00 mol), 4-methoxyphenol: 0.1 g, Ethyl acetate: 500 g was charged, and triethylamine: 101 g (1.00 mol) was added dropwise while stirring while maintaining the temperature at 40°C or lower. After the dropwise addition was completed, the mixture was stirred at 70 to 80°C for 6 hours.
- Copolymer solutions A-2 to A-5 were obtained by carrying out the polymerization reaction in the same manner as in Production Example P1 except that the monomers and solvents shown in Table 3 were used.
- Table 3 shows the heating residue and Mw of each polymer.
- the unit of numerical values for the amounts of raw materials in the table is g.
- Polymerization initiator 1 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate: trade name "Per Octa O” (manufactured by NOF Corporation)
- Polymerization initiator 2 t-butyl peroxyoctoate: trade name "Per-butyl O” (manufactured by NOF Corporation)
- Polymerization initiator 3 tert-butyl peroxyisopropyl carbonate: trade name "Per-butyl I” (manufactured by NOF Corporation) 2,3-dihydroxypropyl acrylate: trade name “2,3-dihydroxypropyl acrylate” (manufactured by Nippon Shokubai Co., Ltd.)
- Vinyl neononanoate trade name "VeoVa9" (manufactured by Hexion)
- Vinyl neodecanoate trade name "VeoVa10" (manufactured
- Examples 1-24 and Comparative Examples 1-2 production of coating composition
- a coating composition was produced by blending the components shown in Tables 7 to 10 at the ratios (% by mass) shown in the same tables and mixing and dispersing the mixture with glass beads having a diameter of 1.5 to 2.5 mm.
- Cuprous oxide trade name “NC-301” (manufactured by Nisshin Chemco Co., Ltd.)
- Copper pyrithione trade name “Copper Omagin” (manufactured by LONZA Co., Ltd.)
- SeaNine trade name "Sea Nine 211", 4,5-dichloro-2-octyl-4-isothiazolin-3-one (manufactured by R&H), active ingredient 30% xylene solution
- Zineb [ethylene bis(dithiocarbamate)] zinc ( Ouchi Shinko Chemical Industry Co., Ltd.)
- Zinc pyrithione (manufactured by LONZA Co., Ltd.)
- Econea 028 Trade name “Econea 028” 2-(p-chlorophenyl)-3-cyano-4-bromo-5-trifluoromethylpyrrole (manufactured by Janssen PMP) Medetomidine: ( ⁇ )-4-
- Bengara Product name "Bengara goldfish” (manufactured by Morishita Bengara Kogyo Co., Ltd.)
- Talc Product name “Talc MS” (manufactured by Nippon Talc Co., Ltd.)
- Zinc oxide Product name “Type 2 zinc oxide” (manufactured by Seido Chemical Industry Co., Ltd.)
- Titanium oxide trade name “FR-41” (manufactured by Furukawa Co., Ltd.)
- Disparlon A603-20X amide-based thixotropic agent: trade name "Disparlon A603-20X” (manufactured by Kusumoto Kasei Co., Ltd.) Tetraethoxysilane: trade name “Ethyl Silicate 28” (manufactured by Colcoat Co., Ltd.) Tricresyl phosphate: (manufactured by Daihachi Chemical Industry Co., Ltd.)
- Example 1 (rotary test)> A rotating drum with a diameter of 515 mm and a height of 440 mm was attached to the center of the water tank, and it was made to rotate by a motor. In addition, a cooling device for keeping the seawater temperature constant and a pH automatic controller for keeping the seawater pH constant were installed.
- a test plate was prepared according to the following method. First, on a titanium plate (71 ⁇ 100 ⁇ 0.5 mm), an antirust paint (epoxy vinyl A/C) is applied so that the thickness after drying is about 100 ⁇ m, and dried to form an antirust coating film. did. After that, the coating compositions obtained in Examples and Comparative Examples were applied so that the dry film thickness was about 300 ⁇ m, and dried at 40° C.
- an antirust paint epoxy vinyl A/C
- the prepared test plate was fixed to the rotating drum of the rotating device of the apparatus so as to be in contact with seawater, and the rotating drum was rotated at a speed of 20 knots. During this period, the temperature of the seawater was kept at 25°C and the pH at 8.0-8.2, and the seawater was replaced every two weeks. The remaining film thickness of each test plate at the initial stage and every 6 months after the start of the test was measured with a shape measurement laser microscope VK-X100 manufactured by Keyence Corporation, and the dissolved coating film thickness was calculated from the difference. The coating film dissolution amount ( ⁇ m/month) was obtained.
- the surface condition of each coating film was evaluated by observing the surface of each coating film with the naked eye and a microscope.
- the coating film surface condition was evaluated according to the following criteria. ⁇ : When there is no abnormality ⁇ : Hair cracks can be seen in less than 10% of the total surface area of the coating film ⁇ : Hair cracks can be seen in 10 to 30% of the total surface area of the coating film ⁇ : Coating film Hair cracks can be seen in more than 30% of the total surface area XX: Large cracks, blisters or peeling (only the surface of the coating or part of the edge is peeled off), peeling (the entire coating is peeled off, and the test Abnormalities in the coating film such as no coating film remaining)
- Example 2 (antifouling test)> The coating compositions obtained in Examples and Comparative Examples were applied to both sides of a hard PVC board (100 ⁇ 200 ⁇ 2 mm) so that the thickness of the dry coating film would be about 300 ⁇ m.
- a test plate having a dry coating film having a thickness of about 300 ⁇ m was prepared by drying the obtained coated material at room temperature (25° C.) for 3 days. This test plate was immersed 1.5 m below sea level in Owase City, Mie Prefecture, and the fouling of the test plate due to deposits was observed after 12 months, 24 months and 30 months. The evaluation was carried out by visually observing the state of the coating film surface, and judged according to the following criteria.
- ⁇ No attachment of fouling organisms such as shellfish and algae, and almost no slime.
- ⁇ No fouling organisms such as shellfish and algae adhered, and slime was thinly adhered (to the extent that the coating film surface was visible), but could be removed by lightly wiping with a brush.
- ⁇ No fouling organisms such as shellfish and algae adhered, but the slime adhered so thickly that the coating film surface was not visible, and could not be removed even by strong wiping with a brush.
- ⁇ Level at which fouling organisms such as shellfish and algae are attached
Abstract
Description
このような問題を防ぐために、船舶等に防汚塗料組成物を塗布して防汚塗膜を形成し、防汚塗膜から防汚薬剤を徐放させることによって、長期間に渡って防汚性能を発揮させる技術が知られている(特許文献1~4)。
1.防汚塗料組成物
本発明の防汚塗料組成物は、共重合体A、重合体Bおよび防汚薬剤Dを含有する。
共重合体Aは、単量体(a)と、単量体(a)以外のエチレン性不飽和単量体単量体(b)の共重合体であり、単量体(a)及び単量体(b)に由来する単量体単位を含む。単量体(a)と単量体(b)の合計に対する単量体(a)の含有量は、10~90質量%が好ましく、20~70質量%が更に好ましい。具体的には例えば、10、15、20、25、30、35、40、45、50、55、60、65、70、75、80、85、90質量%であり、ここで例示した数値の何れか2つの間の範囲内であってもよい。この場合に、塗膜溶解性が特に良好となる。
単量体(a)は、一般式(1)で表される。
単量体(a1)は、一般式(1)のnが1である化合物である。
単量体(a1)としては、例えば、(メタ)アクリル酸メトキシカルボニルメチル、(メタ)アクリル酸エトキシカルボニルメチル、(メタ)アクリル酸イソプロポキシカルボニルメチル、(メタ)アクリル酸n-プロポキシカルボニルメチル、(メタ)アクリル酸n-ブトキシカルボニルメチル、(メタ)アクリル酸t-ブトキシカルボニルメチル、(メタ)アクリル酸2-エチルヘキシルオキシカルボニルメチル、(メタ)アクリル酸シクロヘキシルオキシカルボニルメチル、(メタ)アクリル酸ベンジルオキシカルボニルメチル、(メタ)アクリル酸フェノキシカルボニルメチル、(メタ)アクリル酸2-メトキシエトキシカルボニルメチル、(メタ)アクリル酸4-メトキシブトキシカルボニルメチル、(メタ)アクリル酸アリロキシカルボニルメチル、(メタ)アクリル酸ビニロキシカルボニルメチル、(メタ)アクリル酸1-(メトキシカルボニル)エチル、(メタ)アクリル酸1-(エトキシカルボニル)エチル、(メタ)アクリル酸1-(n-プロポキシカルボニル)エチル、(メタ)アクリル酸1-(イソプロポキシカルボニル)エチル、(メタ)アクリル酸1-(n-ブトキシカルボニル)エチル、(メタ)アクリル酸1-(t-ブトキシカルボニル)エチル、(メタ)アクリル酸α-(メトキシカルボニル)ベンジル、(メタ)アクリル酸α-(エトキシカルボニル)ベンジルが挙げられ、好ましくは、(メタ)アクリル酸メトキシカルボニルメチル、(メタ)アクリル酸エトキシカルボニルメチル、(メタ)アクリル酸イソプロポキシカルボニルメチル、(メタ)アクリル酸n-プロポキシカルボニルメチル、(メタ)アクリル酸n-ブトキシカルボニルメチル、(メタ)アクリル酸1-(メトキシカルボニル)エチル、(メタ)アクリル酸1-(エトキシカルボニル)エチルが挙げられる。
単量体(a2)は、一般式(1)のnが2以上である化合物である。一般式(1)のnは、長期防汚性の観点から2~6が好ましい。
単量体(b)は、単量体(a)以外のエチレン性不飽和単量体である。単量体(b)は、単量体(b1)と単量体(b2)に分類することができる。
単量体(b1)は、n-オクタノール/水間の分配係数Pの常用対数logPが0.8以下であるエチレン性不飽和単量体である。
マレイン酸ジメチル、フマル酸ジメチル等の二塩基酸のジアルキルエステル化合物類等;
酢酸ビニル、N-ビニルピロリドン等の官能基を有するビニル化合物等;が挙げられる。
これらの単量体(b1)は、単独で又は2種以上を組み合わせて使用できる。
単量体(b2)は、単量体(b)から単量体(b1)を除いたもので、単量体(b1)以外の(メタ)アクリル酸エステル、ビニル化合物、芳香族化合物、二塩基酸のジアルキルエステル化合物等が挙げられる。なお、本明細書において、(メタ)アクリル酸エステルは、アクリル酸エステル、又はメタアクリル酸エステルを意味する。
(メタ)アクリル酸トリイソプロピルシリル、(メタ)アクリル酸t-ブチルジフェニルシリル、(メタ)アクリル酸トリn-オクチルシリル、(メタ)アクリル酸トリ2-エチルヘキシルシリル等の(メタ)アクリル酸シリルエステル類;等が挙げられる。
前記ビニル化合物としては、例えば、塩化ビニル、塩化ビニリデン、アクリロニトリル、メタクリロニトリル、安息香酸ビニル、ネオノナン酸ビニル、ネオデカン酸ビニル、ビニルブチレート、ブチルビニルエーテル、ラウリルビニルエーテル等の官能基を有するビニル化合物が挙げられる。
前記芳香族化合物としては、例えば、スチレン、ビニルトルエン、α-メチルスチレン等が挙げられる。
前記二塩基酸のジアルキルエステル化合物としては、マレイン酸ジブチル、フマル酸ジメチル等が挙げられる。
共重合体Aの重量平均分子量(Mw)は5000~300000であることが望ましい。分子量が5000未満であれば、防汚塗料の塗膜が脆弱となり、剥離やクラックを起こし易く、また、300000を超えると、重合体溶液の粘度が上昇し、取扱いが困難となるからである。このMwは、具体的には例えば、5000、10000、20000、30000、40000、50000、60000、70000、80000、90000、100000、200000、300000であり、ここで例示した数値の何れか2つの間の範囲内であってもよい。
その中でも、酢酸ブチル、酢酸イソブチル、ブチルアルコール、プロピレングリコールモノメチルエーテル、プロピレングリコール1-モノメチルエーテル2-アセタート、トルエン、キシレンが好ましい。これら溶媒については、単独あるいは2種以上を組み合わせて使用できる。
重合反応における反応温度は、重合開始剤の種類等に応じて適宜設定すればよく、通常50~160℃であり、好ましくは60~150℃である。
重合体Bは、単量体(a)以外のエチレン性不飽和単量体単量体(b)の重合体であり、前記単量体(b)には、1種以上の単量体(b1)が含まれる。重合体Bは、単量体(b1)のみを含む単量体の重合体であってもよく、単量体(b1)と単量体(b2)を含む単量体の重合体であってもよい。重合体Bは、1種の単量体の単独重合体であってもよく、複数種の単量体の共重合体であってもよい。単量体(b1)と単量体(b2)の合計に対する単量体(b1)の含有量(つまり、単量体(b)中の単量体(b1)の含有量)は、15~100質量%が好ましく、20~100質量%が更に好ましい。単量体(b1)の含有量は、具体的には例えば、15、20、25、30、35、40、45、50、55、60、65、70、75、80、85、90、95,100質量%であり、ここで例示した数値の何れか2つの間の範囲内であってもよい。この場合に、スライムに対する防汚性が特に良好となる。
防汚薬剤としては、例えば無機薬剤及び有機薬剤が挙げられる。
無機薬剤としては、例えば、亜酸化銅、チオシアン酸銅(一般名:ロダン銅)、銅粉等が挙げられる。この中でも特に、亜酸化銅とロダン銅が好ましく、亜酸化銅はグリセリン、ショ糖、ステアリン酸、ラウリン酸、リシチン、鉱物油などで表面処理されているものが、貯蔵時の長期安定性の点でより好ましい。
有機薬剤としては、例えば、2-メルカプトピリジン-N-オキシド銅(一般名:カッパーピリチオン)、2-メルカプトピリジン-N-オキシド亜鉛(一般名:ジンクピリチオン)、ジンクエチレンビスジチオカーバメート(一般名:ジネブ)、4,5-ジクロロ-2-n-オクチル-3-イソチアゾロン(一般名:シーナイン211)、3,4-ジクロロフェニル-N-N-ジメチルウレア(一般名:ジウロン)、2-メチルチオ-4-t-ブチルアミノ-6-シクロプロピルアミノ-s-トリアジン(一般名:イルガロール1051)、2-(p-クロロフェニル)-3-シアノ-4-ブロモ-5-トリフルオロメチルピロール(一般名:Econea28)、4-[1-(2,3-ジメチルフェニル)エチル]-1H-イミダゾール(一般名:メデトミジン)等が挙げられる。
これらの防汚薬剤は1種又は2種以上併用して使用できる。
さらに本発明の防汚塗料用樹脂には、必要に応じて、共重合体A及び重合体B以外の樹脂成分、溶出調整剤、可塑剤、顔料、染料、消泡剤、脱水剤、揺変剤、有機溶剤等を添加して防汚塗料とすることができる。
前記ロジン誘導体としては、水添ロジン、不均化ロジン、マレイン化ロジン、ホルミル化ロジン、重合ロジン等を例示できる。
前記脂環式炭化水素樹脂としては、市販品として、例えば、クイントン1500、1525L、1700(商品名、日本ゼオン社製)等が挙げられる。
この中でもロジン、ロジン誘導体、ナフテン酸、バーサチック酸、トリメチルイソブテニルシクロヘキセンカルボン酸、又はこれらの金属塩が好ましい。
本発明の防汚塗料組成物は、例えば、共重合体A、重合体B及び防汚薬剤、他の添加剤等を含有する混合液を、分散機を用いて混合分散することにより製造できる。
前記混合液としては、共重合体A、重合体B及び防汚薬剤等の各種材料を溶媒に溶解または分散させたものであることが好ましい。
前記分散機としては、例えば、微粉砕機として使用できるものを好適に用いることができる。例えば、市販のホモミキサー、サンドミル、ビーズミル、ディスパー等を使用することができる。また、撹拌機を備えた容器に混合分散用のガラスビーズ等を加えたものを用い、前記混合液を混合分散してもよい。
本発明の防汚処理方法は、上記防汚塗料組成物を用いて被塗膜形成物の表面に防汚塗膜を形成する。本発明の防汚処理方法によれば、前記防汚塗膜が表面から徐々に溶解し塗膜表面が常に更新されることにより、水棲汚損生物の付着防止を図ることができる。
被塗膜形成物としては、例えば、船舶(特に船底)、漁業具、水中構造物等が挙げられる。
防汚塗膜の厚みは、被塗膜形成物の種類、船舶の航行速度、海水温度等に応じて適宜設定すればよい。例えば、被塗膜形成物が船舶の船底の場合、防汚塗膜の厚みは通常50~700μm、好ましくは100~600μmである。
各製造例、実施例及び比較例中の%は質量%を示す。重量平均分子量(Mw)は、GPCにより求めた値(ポリスチレン換算値)である。GPCの条件は下記の通りである。
装置・・・ 東ソー株式会社製 HLC-8320GPC
カラム・・・ TSKgel SuperHZM-M 2本
流量・・・ 0.35 mL/min
検出器・・・ RI
カラム恒温槽温度・・・ 40℃
溶離液・・・ THF
加熱残分は、JIS K 5601-1-2:1999(ISO 3251:1993)「塗料成分試験方法-加熱残分」に準拠して測定した値である。
表4~表6中のlogPは、PerkinElmer社のChemDraw Professional 17 Suiteのプログラムを用いて得られた値である。
1-1.単量体(a1)の製造例
<製造例1(単量体a1-1の製造)>
温度計、冷却器、攪拌装置及び滴下ロートを備えた四ツ口フラスコに、クロロ酢酸メチル:109g(1.00mol)、アクリル酸:72g(1.00mol)、4-メトキシフェノール:0.1g、酢酸エチル:500gを仕込み、攪拌しながらトリエチルアミン:101g(1.00mol)を40℃以下に保ちながら滴下した。滴下終了後、70~80℃で6時間攪拌した。反応終了後、市水、塩酸水、重曹水の順に有機層を洗浄後、減圧濃縮により溶媒を留去することで単量体a1-1:129.7gを得た。
表1に示す原料を用いて、製造例1と同様の操作で反応を行うことにより単量体a1-2~a1-3を得た。製造例1~3の反応条件、収量を表1に示す。
<製造例8(単量体a2-1の製造)>
(第1反応)
温度計、冷却器、攪拌装置を備えた四ツ口フラスコに、モノクロロ酢酸ナトリウム:215g(1.85mol)、クロロ酢酸メチル:201g(1.85mol)、N-メチル-2-ピロリドン:300gを仕込み、70~80℃で6時間攪拌した。反応終了後、反応液にトルエン:500mlを仕込み、市水、塩酸水、重曹水の順に有機層を洗浄後、減圧濃縮により溶媒を留去することでクロロ酢酸メトキシカルボニルメチル:262gを得た。
次いで、温度計、冷却器、攪拌装置及び滴下ロートを備えた四ツ口フラスコに、第1反応の生成物であるクロロ酢酸メトキシカルボニルメチル:200g(1.20mol)、アクリル酸:87g(1.20mol)、4-メトキシフェノール:0.1g、酢酸エチル:500gを仕込み、攪拌しながらトリエチルアミン:122g(1.20mol)を40℃以下に保ちながら滴下した。滴下終了後、70~80℃で6時間攪拌した。反応終了後、市水、塩酸水、重曹水の順に有機層を洗浄後、減圧濃縮により溶媒を留去することで単量体a2-1:230.6gを得た。
表2に示す原料を用いて、製造例8と同様の操作で反応を行うことにより、表2に示す単量体a2-2~a2-15を得た。製造例8~22の反応条件、収量を表2に示す。
AA:アクリル酸
MAA:メタクリル酸
NMP:N-メチル-2-ピロリドン
CANa:モノクロロ酢酸ナトリウム
CPANa:2-クロロプロピオン酸ナトリウム
CAMe:クロロ酢酸メチル
CAEt:クロロ酢酸エチル
CAiPr:クロロ酢酸イソプロピル
CAnBu:クロロ酢酸n-ブチル
CPAMe:2-クロロプロピオン酸メチル
MEHQ:4-メトキシフェノール
TEA:トリエチルアミン
<製造例P1(共重合体溶液A-1の製造)>
温度計、冷却器、攪拌装置及び滴下ロートを備えた四ツ口フラスコに、溶媒として、キシレン:80g、及び1-ブタノール:20gを仕込み、窒素ガスを導入し、攪拌しながら88℃を保持した。そこへ、表3に示す配合量(g)の単量体(a)及び単量体(b)と、重合開始剤として、1,1,3,3-テトラメチルブチルパーオキシ-2-エチルヘキサノエート:2.0g(初期添加)の混合液を88℃で保持しながら3時間かけて滴下した。その後、88℃で1時間攪拌を行った後、1,1,3,3-テトラメチルブチルパーオキシ-2-エチルヘキサノエート:0.1gを1時間毎に3回添加し、さらに同温度で2時間攪拌を行った後、室温に冷却し、共重合体溶液A-1を得た。A-1の加熱残分、Mwを表3に示す。
表3に示す単量体及び溶剤を用いた以外は、製造例P1と同様の操作で重合反応を行うことにより共重合体溶液A-2~A-5を得た。各重合体の加熱残分、Mwを表3に示す。表中の原料の配合量の数値の単位は、gである。
温度計、冷却器、攪拌装置及び滴下ロートを備えた四ツ口フラスコに、溶媒として、酢酸ブチル:56gを仕込み、窒素ガスを導入し、攪拌しながら温度125±5℃を保持した。そこへ、表4に示す配合量(g)の単量体(b1)及び単量体(b2)と、重合開始剤2:1.6g(初期添加)、酢酸ブチル:2gの混合液を温度125±5℃で保持しながら2時間かけて滴下した。その後、125±5℃で30分間攪拌を行った後、重合開始剤2:0.1gを30分毎に2回添加し、さらに同温度で1時間攪拌を行った後、室温に冷却し、キシレン:22gで希釈し、重合体溶液B-1を得た。B-1の加熱残分、Mwを表4に示す。表中の原料の配合量の数値の単位は、gである。
表4~表6に示す単量体、重合開始剤及び溶剤を用いた以外は、製造例P6と同様の操作で重合反応を行うことにより重合体溶液B-2~B-15及びC-1を得た。各重合体の加熱残分、Mwを表4~表6に示す。表中の原料の配合量の数値の単位は、gである。
重合開始剤1:1,1,3,3-テトラメチルブチルパーオキシ-2-エチルヘキサノエート:商品名「パ―オクタO」(日油社製)
重合開始剤2:t-ブチルパーオキシオクトエート:商品名「パ―ブチルO」(日油社製)
重合開始剤3:tert-ブチルパーオキシイソプロピルカルボネート:商品名「パ―ブチルI」(日油社製)
アクリル酸2,3-ジヒドロキシプロピル:商品名「アクリル酸2,3-ジヒドロキシプロピル」(日本触媒社製)
ネオノナン酸ビニル:商品名「VeoVa9」(Hexion社製)
ネオデカン酸ビニル:商品名「VeoVa10」(Hexion社製)
アクリル酸メトキシポリエチレングリコール:商品名「ポリエチレングリコールモノメチルエーテルアクリラート(n=約9)」、分子量約470(東京化成工業社製)
<製造例D1(ガムロジン溶液の製造)>
温度計、還流冷却器、及び攪拌機を備えたフラスコに、中国産ガムロジン(WW)300gとキシレン310gをフラスコに入れ、70~80℃で1時間、減圧下で還流脱水することにより、ガムロジンのキシレン溶液(褐色透明液体、固形分50%)を得た。得られた溶液の加熱残分は、50.3%であった。
温度計、還流冷却器、及び攪拌機を備えたフラスコに、中国産ガムロジン(WW)240gとキシレン360gをフラスコに入れ、更に、前記ロジン中の樹脂酸が全て亜鉛塩を形成するように酸化亜鉛120gを加え、70~80℃で3時間、減圧下で還流脱水した。その後、冷却しろ過を行うことにより、ガムロジン亜鉛塩のキシレン溶液(濃褐色透明液体、固形分50%)を得た。得られた溶液の加熱残分は、50.2%であった。
製造例D2の中国産ガムロジン(WW)を水添ガムロジンに変える以外は製造例D2と同じ方法で、水添ロジン亜鉛塩のキシレン溶液(濃褐色透明液体、固形分50%)を得た。
表7~表10に示す成分を同表に示す割合(質量%)で配合し、直径1.5~2.5mmのガラスビーズと混合分散することにより塗料組成物を製造した。
<重合体B>
塩化ビニル・酢酸ビニル共重合樹脂:商品名「ソルバインC5R」、塩化ビニル:酢酸ビニル=79:21(重量比率)、Mw 58000、ガラス転移温度 68℃、(日信化学工業株式会社製)
水添ロジン亜鉛塩溶液:製造例D3で製造したものを使用
ガムロジン亜鉛塩溶液:製造例D2で製造したものを使用
ガムロジン溶液:製造例D1で製造したものを使用
亜酸化銅:商品名「NC-301」(日進ケムコ株式会社製)
銅ピリチオン:商品名「カッパーオマジン」(LONZA株式会社製)
SeaNine:商品名「シーナイン211」、4,5-ジクロロ-2-オクチル-4-イソチアゾリン-3-オン(R&H社製)、有効成分30%キシレン溶液
Zineb:[エチレンビス(ジチオカーバメート)]亜鉛(大内振興化学工業株式会社製)
亜鉛ピリチオン:(LONZA株式会社製)
Econea 028:商品名「Econea 028」2-(p-クロロフェニル)-3-シアノ-4-ブロモ-5-トリフルオロメチルピロール(ヤンセンPMP製)
メデトミジン:(±)-4-[1-(2,3-ジメチルフェニル)エチル]-1H-イミダゾール(和光純薬工業株式会社製)
チオシアン酸銅:商品名「チオシアン酸銅(I)」(富士フイルム和光純薬株式会社製)
ベンガラ:商品名「ベンガラキンギョク」(森下弁柄工業株式会社製)
タルク:商品名「タルクMS」(日本タルク株式会社製)
酸化亜鉛:商品名「酸化亜鉛2種」(正同化学工業株式会社製)
酸化チタン:商品名「FR-41」(古河機械金属株式会社製)
ディスパロンA603-20X:アマイド系チクソトロピック剤:商品名「ディスパロンA603-20X」(楠本化成株式会社製)
テトラエトキシシラン:商品名「エチルシリケート28」(コルコート株式会社製)
トリクレジルフォスフェート:(大八化学化学工業株式会社製)
実施例・比較例の塗料組成物について、以下に示す試験を行った。評価結果を表7~表10に示す。
全ての比較例では、実施例に比べて、ロータリー試験と防汚試験の少なくとも一方において結果が良好でなかった。
水槽の中央に直径515mm及び高さ440mmの回転ドラムを取付け、これをモーターで回転できるようにした。また、海水の温度を一定に保つための冷却装置、及び海水のpHを一定に保つためのpH自動コントローラーを取付けた。
試験板を下記の方法に従って作製した。
まず、チタン板(71×100×0.5mm)上に、防錆塗料(エポキシビニル系A/C)を乾燥後の厚みが約100μmとなるよう塗布し乾燥させることにより防錆塗膜を形成した。その後、実施例及び比較例で得られた塗料組成物を、乾燥膜厚が約300μmとなるように塗布し、40℃で3日乾燥させることにより、試験板を用意した。
作製した試験板を上記装置の回転装置の回転ドラムに海水と接触するように固定して、20ノットの速度で回転ドラムを回転させた。その間、海水の温度を25℃、pHを8.0~8.2に保ち、二週間毎に海水を入れ換えた。
各試験板の初期と試験開始後6ヶ月毎の残存膜厚を(株)キーエンス製の形状測定レーザーマイクロスコープVK-X100で測定し、その差から溶解した塗膜厚を計算することにより1ヶ月あたりの塗膜溶解量(μm/月)を得た。また、ロータリー試験24ヶ月後の残存膜厚の測定時、各塗膜表面を肉眼及びマイクロスコープで観察して塗膜の表面状態を評価した。
塗膜表面状態の評価は以下の基準で行った。
◎:全く異常のない場合
○:塗膜表面全面積の1割未満に、ヘアークラックが見られるもの
△:塗膜表面全面積の1~3割に、ヘアークラックが見られるもの
×:塗膜表面全面積の3割以上に、ヘアークラックが見られるもの
××:大きなクラック、ブリスター又はハガレ(塗膜の表面のみや端の一部が剥がれる事)、剥離(塗膜全体が剥がれて、試験塗膜が残っていない状態)などの塗膜に異常が見られるもの
実施例及び比較例で得られた塗料組成物を、硬質塩ビ板(100×200×2mm)の両面に乾燥塗膜としての厚みが約300μmとなるよう塗布した。得られた塗布物を室温(25℃)で3日間乾燥させることにより、厚みが約300μmの乾燥塗膜を有する試験板を作製した。この試験板を三重県尾鷲市の海面下1.5mに浸漬して付着物による試験板の汚損を12ヶ月後、24ヶ月後、30ヶ月後に観察した。
評価は、塗膜表面の状態を目視観察することにより行い、以下の基準で判断した。
◎:貝類や藻類などの汚損生物の付着がなく、かつ、スライムも殆どなし。
○:貝類や藻類などの汚損生物の付着がなく、かつ、スライムが薄く(塗膜面が見える程度)付着しているものの刷毛で軽く拭いて取れるレベル。
△:貝類や藻類などの汚損生物の付着はないが、塗膜面が見えない程スライムが厚く付着しており、刷毛で強く拭いても取れないレベル。
×:貝類や藻類などの汚損生物が付着しているレベル
Claims (2)
- 共重合体A、重合体Bおよび防汚薬剤Dを含有する防汚塗料組成物であって、
前記共重合体Aは、一般式(1)で表される単量体(a)と、前記単量体(a)以外のエチレン性不飽和単量体(b)の共重合体であり、
前記単量体(a)は、前記一般式(1)中のnが2以上である化合物を含み、
前記重合体Bは、n-オクタノール/水間の分配係数Pの常用対数logPが0.8以下である単量体(b1)を1種以上含むエチレン性不飽和単量体(b)の重合体である、防汚塗料組成物。
(式中、R1は水素又はメチル基を示し、R2は、水素、メチル基、フェニル基を示し、R3は、炭素数1~8のアルコキシ基又はフェニル基で置換されていてもよい炭素数1~8のアルキル基であるか、又はフェニル基を示し、nは、1~10の整数を示す。) - 請求項1に記載の防汚塗料組成物であって、
前記単量体(b)は、前記単量体(b1)を15~100質量%含有する、防汚塗料組成物。
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- 2022-03-30 WO PCT/JP2022/016328 patent/WO2022224785A1/ja active Application Filing
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