WO2015025918A1 - 防食塗料組成物、防食塗膜および基材の防食方法 - Google Patents
防食塗料組成物、防食塗膜および基材の防食方法 Download PDFInfo
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- WO2015025918A1 WO2015025918A1 PCT/JP2014/071876 JP2014071876W WO2015025918A1 WO 2015025918 A1 WO2015025918 A1 WO 2015025918A1 JP 2014071876 W JP2014071876 W JP 2014071876W WO 2015025918 A1 WO2015025918 A1 WO 2015025918A1
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- WIPO (PCT)
- Prior art keywords
- component
- curing agent
- olefin
- composition
- coating composition
- Prior art date
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- 239000004094 surface-active agent Substances 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- XOALFFJGWSCQEO-UHFFFAOYSA-N tridecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCOC(=O)C=C XOALFFJGWSCQEO-UHFFFAOYSA-N 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Images
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
- C09D5/08—Anti-corrosive paints
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
Definitions
- the present invention relates to an anticorrosion coating composition, an anticorrosion coating film, and a method for preventing corrosion of a substrate, and more particularly, an anticorrosion coating composition capable of forming an anticorrosion coating film having excellent adhesion and corrosion resistance to a metal substrate.
- the present invention relates to a product, an anticorrosion coating film formed from the composition, and a metal substrate anticorrosion method using the composition.
- anticorrosion coating In order to prevent corrosion, large-scale steel structures such as ships, land structures and bridges are usually subjected to anticorrosion coating using an anticorrosion coating composition.
- an anti-corrosion coating composition is applied so that an anti-corrosion coating having a thickness of several hundred to several thousand ⁇ m is formed on the surface of a steel plate or the like, and the surface of the steel plate or the like is shielded by the anti-corrosion coating. And, corrosion of steel sheets and the like is prevented by preventing contact with oxygen, salt, water vapor and the like.
- the stripe coat is painted with brush or roller on the edge.
- painting with a brush or a roller generally leaves a foam on the surface of the coating film and impairs the appearance of the coating film. Therefore, an antifoaming agent is generally added to the coating material.
- Known antifoaming agents include silicone-based antifoaming agents and acrylic / vinyl ether-based antifoaming agents.
- the present applicant has disclosed an anticorrosion coating composition comprising a non-tar epoxy resin, a curing agent, an epoxy group-containing alkoxysilane compound, a specific flat pigment, and an extender pigment ( Patent Document 1).
- Patent Document 2 discloses an epoxy resin coating composition containing a silicone-based antifoaming agent
- Patent Document 3 discloses an epoxy resin coating composition containing an acrylic / vinyl ether-based antifoaming agent.
- Patent Document 4 discloses an epoxy coating composition containing a polyolefin wax.
- anti-corrosion coating is applied.
- an epoxy anticorrosive coating composition is usually used, and a stripe coating is applied to the weld line and the edge portion where it is difficult to secure a film thickness by brush or roller. In this case, it is important that the foam biting is small in consideration of corrosion resistance and appearance.
- silicone-based antifoaming agents tend to reduce the adhesion of the film formed thereon.
- acrylic / vinyl ether antifoaming agent is weak in effect, and if added in a small amount, there may be no sufficient effect.
- the effect tends to be weak in an epoxy resin-based coating material in which a liquid acrylic polymer is added for interlayer adhesion modification.
- the present inventors have added poly ⁇ -olefins containing structural units derived from ⁇ -olefins having 6 or more carbon atoms to the epoxy anticorrosive coating composition. It was found that a coating film exhibiting a good defoaming effect and excellent in anticorrosion properties can be formed.
- the configuration of the present invention is as follows.
- An anticorrosive coating composition containing an epoxy resin (a), a curing agent (b), and a poly ⁇ -olefin (c) containing a structural unit derived from an ⁇ -olefin having 6 or more carbon atoms.
- liquid acrylic polymer (f) contains a structural unit derived from an acrylate having a C 4-18 alkyl group containing a branched structure.
- An anticorrosion method for a substrate comprising a step of applying the anticorrosion coating composition according to any one of [1] to [10] above on a substrate.
- a two-component paint comprising a combination of a main ingredient component and a hardener component accommodated so as not to contact each other,
- the main agent component contains an epoxy resin (a)
- the curing agent component contains a curing agent (b)
- at least one of the main agent component or the curing agent component is a structural unit derived from an ⁇ -olefin having 6 or more carbon atoms.
- a multi-component paint comprising a combination of a main ingredient component, a curing agent component and at least one other component accommodated so as not to contact each other,
- the main agent component includes an epoxy resin (a)
- the curing agent component includes a curing agent (b)
- at least one of the main agent component, the curing agent component, or the other component is an ⁇ -olefin having 6 or more carbon atoms.
- a multi-component paint comprising a poly ⁇ -olefin (c) comprising a structural unit derived therefrom.
- an anticorrosion coating composition having excellent adhesion and anticorrosion properties to a substrate, and the anticorrosion coating composition that suppresses foam remaining on the surface of a coating film even when applied using a brush or a roller. Obtainable.
- FIG. 1 is a schematic diagram for explaining an adhesion test in Examples.
- the anticorrosive coating composition of the present invention (hereinafter also simply referred to as “the composition of the present invention”) comprises an epoxy resin (a), a curing agent (b), and a structural unit derived from an ⁇ -olefin having 6 or more carbon atoms. Containing poly ⁇ -olefin (c).
- composition of the present invention contains these components (a) to (c), it is an anticorrosion coating composition having excellent adhesion to the substrate and anticorrosion, and can be applied using a brush or a roller. The foam on the coating film surface can be suppressed.
- composition of the present invention is suitably used as an anticorrosion coating composition for a ship structure such as a ballast tank, and painted with a brush or a roller.
- the composition of the present invention is a two-component composition prepared by mixing a main ingredient component and a curing agent ingredient in view of storage stability and the like (that is, a main ingredient component contained so as not to contact each other)
- a two-component paint comprising a combination of a curing agent component, the main component comprising an epoxy resin (a), the curing agent component comprising a curing agent (b), the main component or the curing agent component At least one of which is a composition prepared by mixing each component of a two-component paint containing a poly ⁇ -olefin (c) containing a structural unit derived from an ⁇ -olefin having 6 or more carbon atoms. .
- the composition of this invention can also be made into 1 component type by selection of a hardening
- the composition of the present invention is a multi-component paint (that is, a multi-component paint comprising a combination of a main ingredient component, a curing agent component and at least one other component contained so as not to contact each other),
- the main component includes an epoxy resin (a)
- the curing agent component includes a curing agent (b)
- at least one of the main component, the curing component or the other component is derived from an ⁇ -olefin having 6 or more carbon atoms.
- the components contained in the other components include those that contribute to the paintability of the composition and the physical properties of the coating film formed from the composition.
- those derived from ⁇ -olefins having 6 or more carbon atoms Poly ⁇ -olefin (c) containing a structural unit, silane coupling agent (d), amide wax (e), liquid acrylic polymer (f), extender pigment (g), coloring pigment, anti-sagging / anti-settling agent, solvent , Plasticizers, curing accelerators, inorganic dehydrating agents (stabilizers), antifouling agents and the like. That is, there is no particular limitation as long as it is a component other than the epoxy resin (a) included in the main component and the curing agent (b) included in the curing agent component.
- the epoxy resin (a) is not particularly limited, and examples thereof include non-tar epoxy resins described in JP-A-11-343454 and JP-A-10-259351.
- Examples of the epoxy resin (a) include polymers or oligomers containing two or more epoxy groups in the molecule, and polymers or oligomers generated by a ring-opening reaction of the epoxy groups.
- Examples of such epoxy resins include bisphenol type epoxy resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, phenol novolac type epoxy resins, cresol type epoxy resins, dimer acid-modified epoxy resins, aliphatic epoxy resins, and alicyclic groups.
- An epoxy resin, an epoxidized oil type epoxy resin, etc. are mentioned.
- an epoxy resin (a) include, for example, bisphenol A type epoxy resin (bisphenol A diglycidyl ether type); bisphenol AD type epoxy resin; epichlorohydrin and bisphenol F (4,4′-methylenebisphenol); Bisphenol F-type epoxy resin obtained from: epoxy novolak resin; alicyclic epoxy resin obtained from 3,4-epoxyphenoxy-3 ′, 4′-epoxyphenylcarboxymethane, etc .; benzene ring in bisphenol A-type epoxy resin Brominated epoxy resins in which at least one of the bonded hydrogen atoms is substituted with bromine atoms; aliphatic epoxy resins obtained from epichlorohydrin and aliphatic dihydric alcohols; epichlorohydrin and tri (hydroxyphenyl) methane Like resulting polyfunctional epoxy resin.
- bisphenol A type epoxy resin bisphenol A diglycidyl ether type
- bisphenol AD type epoxy resin epichlorohydrin and bisphenol F (4,4′-methylenebisphenol
- bisphenol-type epoxy resins are preferable, and bisphenol A-type and bisphenol F-type bisphenol-type epoxy resins are more preferable from the viewpoint that an anticorrosion coating having excellent adhesion to a substrate can be formed.
- Bisphenol A epoxy resin is particularly preferred.
- bisphenol A type epoxy resins that are particularly preferably used include bisphenol A diglycidyl ether, bisphenol A polypropylene oxide diglycidyl ether, bisphenol A ethylene oxide diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, and hydrogenated bisphenol A propylene oxide diester.
- polycondensation products such as bisphenol A type diglycidyl ether such as glycidyl ether.
- the epoxy resin (a) may be synthesized by a conventionally known method or may be a commercially available product.
- E028 manufactured by Akira Ohtake Shin Chemical Co., Ltd., bisphenol A diglycidyl ether resin, epoxy equivalent of 180 to 190, viscosity of 12,000 to 15,000 mPa ⁇ s / 25 as a liquid at room temperature.
- the epoxy resin (a) is preferably liquid or semi-solid at room temperature (temperature of 15 to 25 ° C., the same shall apply hereinafter) from the viewpoint of obtaining a composition having excellent adhesion to the substrate.
- the epoxy equivalent of the epoxy resin (a) is preferably 150 to 1000, more preferably 150 to 600, and particularly preferably 180 to 500 from the viewpoint of anticorrosion.
- the epoxy equivalent is calculated based on the JIS K-7236 method.
- the weight average molecular weight measured by GPC gel permeation chromatograph of the epoxy resin (a) is not generally determined depending on the coating curing conditions (eg, normal dry coating or baking coating) of the resulting composition. However, the weight average molecular weight is preferably 350 to 20,000.
- the epoxy resin (a) is preferably contained in the composition of the present invention in an amount of 5 to 40% by weight, more preferably 10 to 30% by weight.
- the epoxy resin (a) is prepared by mixing the components of the two-component paint (that is, the respective components of the two-component paint) in which the composition of the present invention comprises a main component and a curing agent component.
- Composition or a multi-component composition (that is, a composition prepared by mixing the components of the multi-component paint)
- the epoxy resin (a) is included in the main component, It is desirable that the main component is contained in an amount of preferably 5 to 80% by weight, more preferably 5 to 50% by weight.
- the curing agent (b) is not particularly limited, and examples thereof include amine curing agents and carboxylic acid curing agents. Among them, amine curing such as aliphatic, alicyclic, aromatic, and heterocyclic systems. Agents are preferred.
- Examples of the aliphatic amine curing agent include alkylene polyamines and polyalkylene polyamines.
- alkylene polyamine examples include, for example, the formula: H 2 N—R 1 —NH 2 (R 1 is a divalent hydrocarbon group having 1 to 12 carbon atoms, and any hydrogen atom of the hydrocarbon group is And may be substituted with a hydrocarbon group having 1 to 10 carbon atoms.), Specifically, methylenediamine, ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, trimethyl Examples include hexamethylene diamine.
- polyalkylene polyamine examples include the formula: H 2 N— (C m H 2m NH) n H (m is an integer of 1 to 10, n is an integer of 2 to 10, preferably 2 to 6
- specific examples thereof include diethylenetriamine, dipropylenetriamine, triethylenetetramine, tripropylenetetramine, tetraethylenepentamine, tetrapropylenepentamine, pentaethylenehexamine, and nonaethylene. Decamine etc. are mentioned.
- aliphatic amine curing agents include tetra (aminomethyl) methane, tetrakis (2-aminoethylaminomethyl) methane, 1,3-bis (2′-aminoethylamino) propane, triethylene-bis ( Trimethylene) hexamine, bis (3-aminoethyl) amine, bis (hexamethylene) triamine and the like.
- alicyclic amine curing agent examples include 1,4-cyclohexanediamine, 4,4′-methylenebiscyclohexylamine, 4,4′-isopropylidenebiscyclohexylamine, norbornanediamine, bis (aminomethyl).
- aromatic amine curing agent examples include bis (aminoalkyl) benzene, bis (aminoalkyl) naphthalene, and aromatic polyamine compounds having two or more primary amino groups bonded to the benzene ring.
- examples of the aromatic amine curing agent include bis (cyanoethyl) diethylenetriamine, o-xylylenediamine, m-xylylenediamine (MXDA), p-xylylenediamine, phenylenediamine, and naphthylenediamine.
- Diaminodiphenylmethane diaminodiethylphenylmethane, 2,2-bis (4-aminophenyl) propane, 4,4′-diaminodiphenyl ether, 4,4′-diaminobenzophenone, 4,4′-diaminodiphenyl ether, 4,4 ′ -Diaminodiphenylsulfone, 2,2'-dimethyl-4,4'-diaminodiphenylmethane, 2,4'-diaminobiphenyl, 2,3'-dimethyl-4,4'-diaminobiphenyl, 3,3'-dimethoxy- 4,4'-diaminobiphenyl, bis (aminomethyl Naphthalene, bis (aminoethyl) naphthalene.
- heterocyclic amine curing agent examples include N-methylpiperazine, morpholine, 1,4-bis- (3-aminopropyl) -piperazine, piperazine-1,4-diazacycloheptane, 1- ( 2'-aminoethylpiperazine), 1- [2 '-(2 "-aminoethylamino) ethyl] piperazine, 1,11-diazacycloeicosane, 1,15-diazacyclooctacosane and the like.
- amine curing agents for example, amines (amine compounds) described in JP-B-49-48480 can be used.
- Other examples of the amine curing agent include diethylaminopropylamine and polyetherdiamine.
- amine curing agent examples include a modified product of the above-described amine curing agent, such as polyamide, polyamide amine (polyamide resin), amine adduct with an epoxy compound, Mannich compound (eg, Mannich modified polyamide amine), and Michael adduct. , Ketimine, aldimine, phenalkamine and the like.
- Carboxylic acid curing agents include phthalic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, 3,6-endomethylenetetrahydrophthalic anhydride, hexachloroendomethylenetetrahydrophthalic anhydride, methyl-3,6-endo And methylenetetrahydrophthalic anhydride.
- the curing agent (b) one synthesized by a conventionally known method may be used, or a commercially available product may be used.
- Examples of commercially available products include aliphatic polyamines “ACI Hardener K-39” (manufactured by PTI Japan), polyamidoamines “PA-66”, “PA-23” and “PA-290 (A ”” (Both manufactured by Otake Akira Shin Chemical Co., Ltd.), modified polyamine “MAD-204 (A)” (produced by Otake Akira Shin Chemical Co., Ltd.), Mannich modified polyamidoamine “Adeka Hardener EH- 342W3 "(manufactured by ADEKA),” Sanmide CX-1154 "(manufactured by Sanwa Chemical Co., Ltd.), a Mannich-modified aliphatic polyamine,” Cardlight NC556X80 "(manufactured by Cardlight) Is mentioned.
- curing agent (b) can be used individually by 1 type or in combination of 2 or more types.
- the active hydrogen equivalent of the amine curing agent is preferably 50 to 1000, more preferably 80 to 400 from the viewpoint of corrosion resistance and the like.
- the curing agent (b) is preferably contained in the composition of the present invention in an amount of 1 to 60% by weight, more preferably 2 to 40% by weight.
- the equivalent ratio (active hydrogen equivalent / epoxy equivalent) of the curing agent (b) and the epoxy resin (a) is preferably 0.3 to 1.5, more preferably 0.4. It is desirable to use it in such an amount that it becomes ⁇ 1.0. If it exists in this range, it is preferable at points, such as being able to harden
- the composition of the present invention is a two-component composition comprising a main component and a curing agent component (that is, a composition prepared by mixing the components of the two-component paint) or a multi-component composition.
- a curing agent component that is, a composition prepared by mixing the components of the two-component paint
- a multi-component composition that is, a composition prepared by mixing each component of the multi-component paint
- the curing agent (b) is included in the curing agent component, and preferably 5 in the curing agent component. It is desirable that it is contained in an amount of ⁇ 100 wt%, more preferably 10 ⁇ 100 wt%.
- This curing agent component is prepared so that the curing agent (b) is used in an amount of 50 to 100% as a nonvolatile content (solid content) generated by reaction curing with the epoxy resin (a).
- the viscosity measured with an E-type viscometer of the curing agent component when prepared in such a manner is preferably 100,000 mPa ⁇ s / 25 ° C. or less, from the viewpoint of excellent handleability, coating properties, and the like.
- the pressure is preferably 50 to 10,000 mPa ⁇ s / 25 ° C.
- the non-volatile content refers to a component that becomes a solid content after forming a coating film or a dry coating film-forming component. For example, it is left at 23 ° C. for 24 hours under normal pressure and left after natural drying. Means something.
- the poly ⁇ -olefin (c) contains structural units derived from ⁇ -olefins having 6 or more carbon atoms, preferably 50 to 100 mol%, more preferably 70 to 100 mol% ⁇ -olefin derived structural units. Including.
- the structural unit (mol%) derived from ⁇ -olefin contained in the poly ⁇ -olefin (c) is calculated by a conventional measurement method using 13 C-NMR.
- the weight average molecular weight of the poly ⁇ -olefin (c) is preferably 2000 or more, more preferably 2000 to 100,000, particularly preferably 2000 to 20000.
- the viscosity of the poly ⁇ -olefin (c) is desirably 4000 mPa ⁇ s / 25 ° C. or less.
- the poly ⁇ -olefin (c) preferably has a kinematic viscosity (100 ° C.) of 300 mm 2 / s or less and a flash point of 220 ° C. or more.
- the poly ⁇ -olefin (c) is synthesized using an ⁇ -olefin having 6 or more carbon atoms, and the carbon ( ⁇ -position) -carbon ( ⁇ -position) double bond portion of the ⁇ -olefin is mainly used.
- the main chain is formed by the reaction, and the side chain has a hydrocarbon group having 3 or more carbon atoms.
- the hydrocarbon group is preferably a linear or branched alkyl group having 3 or more carbon atoms, more preferably 3 to 18 carbon atoms, and particularly preferably 6 to 10 carbon atoms. It is preferable in terms of excellent defoaming properties.
- the poly ⁇ -olefin (c) does not have a hydrocarbon group having 3 or more carbon atoms in the side chain, and when the weight average molecular weight is less than 2000, the antifoaming property tends to be inferior.
- the ⁇ -olefin has a C—C double bond at its end and has a straight chain or branched structure having 6 or more carbon atoms, preferably 6 to 20 carbon atoms, more preferably 8 to 12 carbon atoms.
- a linear ⁇ -olefin is preferred. When the number of carbon atoms is 5 or less, the defoaming property is inferior.
- the ⁇ -olefin preferably does not contain a ring structure such as an alicyclic structure or an aromatic ring structure or a polar group such as a hydroxyl group in the molecule.
- ⁇ -olefin examples include 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, etc. From the viewpoint, 1-octene, 1-decene, and 1-dodecene are more preferable. These compounds can be used alone or as a mixture of two or more. These compounds may have any structure of possible isomeric structures as long as the C—C double bond is at the terminal, and may have a branched structure or a linear structure. Two or more of these structural isomers and double bond positional isomers may be used in combination.
- poly ⁇ -olefin examples include homopolymers and copolymers composed of at least one of the ⁇ -olefins. Typical examples thereof include a homopolymer obtained from 1-decene, a copolymer obtained from at least two selected from 1-decene, 1-octene and 1-decene.
- the poly ⁇ -olefin (c) may be appropriately synthesized by a conventionally known method, or a commercially available product may be appropriately selected and used.
- Preferred examples of the commercially available poly ⁇ -olefin (c) include “SpectraSyn 40” (weight average molecular weight 3200, viscosity 870 mPa ⁇ s / 25 ° C., weight obtained from 1-octene, 1-decene and 1-dodecene.
- SpectraSyn Elite 150 weight average molecular weight 7600, viscosity 3780 mPa ⁇ s / 25 ° C., polymer obtained from 1-octene, 1-decene and 1-dodecene
- SpectraSyn Elite 65 weight average molecular weight 4400, viscosity 1410 mPa ⁇ s / 25 ° C., a polymer obtained from 1-octene, 1-decene and 1-dodecene) (ExxonMobil Chemical Company) and the like, and the like.
- Such poly ⁇ -olefin (c) may be used alone or in combination of two or more.
- the poly ⁇ -olefin (c) is preferably 0.01 to 5 parts by weight (nonvolatile content), more preferably 0.05 to 100 parts by weight of the nonvolatile content (solid content) in the composition of the present invention. It is contained in an amount of ⁇ 3 parts by weight, more preferably 0.05 to 1 part by weight (nonvolatile content). If it is in the said range, it is preferable at the point which can suppress the foam on the coating-film surface. When the poly ⁇ -olefin (c) is contained in an amount exceeding 5 parts by weight (nonvolatile content), the anticorrosive property of the resulting anticorrosive coating film may be slightly lowered.
- Such poly ⁇ -olefin (c) is a two-component anticorrosive coating composition (that is, an anticorrosive coating composition prepared by mixing the components of the two-component coating) with the composition of the present invention. In this case, it may be contained in the main component or in the curing agent.
- the composition of the present invention is a multi-component anticorrosive coating composition (that is, a composition prepared by mixing the components of the multi-component paint). May be contained in the main agent, may be contained in the curing agent, or may be contained in other components.
- composition of the present invention contains such a poly ⁇ -olefin (c), it is difficult for a stabilized foam to remain on the surface of the coating film. Such an effect is more prominent when the composition of the present invention contains an amide wax (e) and a liquid acrylic polymer (f) described later.
- liquid acrylic polymer is easy to arrange on the surface of the coating film and stabilize the foam, but the stabilization of the foam can be effectively inhibited by the poly ⁇ -olefin (c).
- composition of the present invention in addition to the components (a) to (c), if necessary, a silane coupling agent (d), an amide wax (e), a liquid acrylic polymer (f), an extender pigment (G), coloring pigment, anti-sagging / precipitating agent, solvent, plasticizer, curing accelerator, inorganic dehydrating agent (stabilizer), antifouling agent, etc. Good.
- These other components may be those conventionally known for use in anticorrosion coating compositions.
- silane coupling agent (d) By using the silane coupling agent (d), not only can the adhesion of the resulting anticorrosive coating film to the substrate be further improved, but also the anticorrosion properties such as salt water resistance of the resulting anticorrosive coating film can be obtained. Since it can improve, it is preferable that the composition of this invention contains a silane coupling agent (d).
- Such silane coupling agents may be used singly or in combination of two or more.
- the silane coupling agent (d) is not particularly limited, and a conventionally known silane coupling agent (d) can be used.
- the compound is preferably a compound that can contribute to the reduction of the viscosity of the compound, and is represented by the formula: X—Si (OR) 3 [X is a functional group capable of reacting with an organic substance (eg, amino group, vinyl group, epoxy group, mercapto Group, isocyanate group, methacryl group, ureido group, sulfur group or a hydrocarbon group containing these groups, etc. (Note that this hydrocarbon group may have an ether bond, etc.) or an alkyl group. OR represents a hydrolyzable group (eg, methoxy group, ethoxy group). It is more preferable that it is a compound represented by this.
- preferable silane coupling agents include “KBM403” ( ⁇ -glycidoxypropyltrimethoxysilane, manufactured by Shin-Etsu Chemical Co., Ltd.), “Syra Ace S-510” (manufactured by JNC Corporation), and the like. Is mentioned.
- the amount of the silane coupling agent (d) is preferably 100 parts by weight of the nonvolatile content of the composition of the present invention.
- the amount is 0.1 to 10 parts by weight, more preferably 0.3 to 5 parts by weight.
- Amide wax (e) Although it does not restrict
- Such an amide wax (e) may be synthesized by a conventionally known method or may be a commercially available product. Examples of commercially available products include “Disparon A630-20X” and “Dispalon 6650” manufactured by Enomoto Kasei Co., Ltd., “ASA T-250F” manufactured by Ito Oil Co., Ltd., and the like.
- the amide wax (e) can be used alone or in combination of two or more.
- anti-sagging agents and anti-settling agents have been conventionally used, and various compounds are known. It is preferable to use amide wax from the viewpoint of excellent stopping effect.
- the content (nonvolatile content) of the amide wax (e) in the composition of the present invention is preferably 0.05 to 15 parts by weight with respect to 100 parts by weight of the nonvolatile content in the composition of the present invention.
- the amount is more preferably 0.3 to 5 parts by weight, still more preferably 0.5 to 3 parts by weight.
- liquid acrylic polymer (f) includes a structural unit derived from an acrylate having an alkyl group having 4 to 18 carbon atoms.
- composition of the present invention it is preferable to use such an acrylic polymer (f) that is liquid at room temperature (15 to 25 ° C.). Even if the amide wax is contained by using the liquid acrylic polymer (f), the spray dust generated from the composition of the present invention hardly reduces the adhesion of the film formed thereon to the object to be coated.
- composition of the present invention adheres as corrosion resistance, adhesion to a substrate (particularly anti-sagging), and spray dust, the adhesion of a film formed thereon to an object to be coated It is excellent in the property that it is difficult to lower.
- the liquid acrylic polymer (f) is not solid or semi-solid, but is liquid at room temperature, is not a polymer mainly composed of methacrylate but is a polymer mainly composed of acrylate, and has a carbon number.
- the composition of the present invention that exhibits the above effect by being a polymer containing an acrylate-derived structural unit having an alkyl group having 4 to 18 carbon atoms, not a polymer containing no acrylate-derived structural unit having an alkyl group of 4 to 18 You can get things.
- liquid acrylic polymer (f) examples include n-butyl acrylate, iso-butyl acrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, hexyl acrylate, heptyl acrylate, n-octyl acrylate, isooctyl acrylate, and n-nonyl.
- Examples thereof include homopolymers or copolymers of acrylates having an alkyl group having 4 to 18 carbon atoms such as acrylate, isononyl acrylate, decyl acrylate, lauryl acrylate, tridecyl acrylate, stearyl acrylate, among which isobutyl acrylate and 2-ethylhexyl.
- acrylates having an alkyl group having 4 to 18 carbon atoms such as acrylate, isononyl acrylate, decyl acrylate, lauryl acrylate, tridecyl acrylate, stearyl acrylate, among which isobutyl acrylate and 2-ethylhexyl.
- Preferred are acrylate homopolymers or copolymers.
- the glass transition temperature of the liquid acrylic polymer (f) adheres as spray dust, it is possible to obtain a composition that hardly reduces the adhesion of the film formed thereon to the coating object, and the like.
- the temperature is preferably 0 ° C. or lower, more preferably ⁇ 30 ° C. or lower.
- the glass transition temperature can be measured by DSC (differential scanning calorimetry).
- the weight average molecular weight of the liquid acrylic polymer (f) measured by GPC is excellent in adhesion to the substrate, and even if it adheres as spray dust, the adhesion of the film formed thereon to the object to be coated is improved. From the standpoint of obtaining a composition that is difficult to lower, it is preferably from 1,000 to 100,000, more preferably from 1,000 to 30,000.
- the viscosity measured with an E-type viscometer of an acrylic polymer solution obtained by diluting the liquid acrylic polymer (f) with an equal amount of butyl acetate depends on the average molecular weight of the polymer. Even if it adheres as a film, it is preferably 5 to 3000 mPa ⁇ s / 25 ° C., more preferably from the viewpoint of obtaining a composition in which the adhesion of the film formed thereon to the coating object is difficult to be reduced. Is 5 to 300 mPa ⁇ s / 25 ° C.
- the liquid acrylic polymer (f) may be synthesized by a conventionally known method or may be a commercially available product.
- the acrylate having an alkyl group having 4 to 18 carbon atoms and other monomers used as necessary are added in the presence of an organic solvent and, if necessary, an additive such as a polymerization initiator.
- an additive such as a polymerization initiator.
- it can be synthesized by reacting for about 2 to 18 hours under heating at 30 to 180 ° C.
- the monomer used for the reaction in such an amount that the liquid acrylic polymer (f) to be obtained contains a structural unit derived from the monomer in the following range.
- organic solvent examples include, but are not limited to, aromatic hydrocarbon solvents such as toluene and xylene, ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone, ester solvents such as butyl acetate, and alcohol solvents such as isopropanol.
- aromatic hydrocarbon solvents such as toluene and xylene
- ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone
- ester solvents such as butyl acetate
- alcohol solvents such as isopropanol.
- mineral spirits aliphatic hydrocarbon solvents such as n-hexane, n-octane, 2,2,2-trimethylpentane, isooctane, n-nonane, cyclohexane and methylcyclohexane. These can be used individually by 1 type or in combination of 2 or more types.
- the varnish containing the liquid acrylic polymer (f) obtained by the above reaction may be used as it is, or a varnish obtained by removing the polymerization initiator. Therefore, as the organic solvent, it is preferable to use a compound similar to the following solvent that can be used in the composition of the present invention.
- the polymerization initiator is not particularly limited, but azobisisobutyronitrile, 2,2-azobis (2-methylbutyronitrile), 2,2-azobis (2-methylpropionitrile), 2,2 -Azo initiators such as azobis (2,4-dimethylvaleronitrile), benzoyl peroxide, t-butylperoxyoctanoate, diisobutyl peroxide, di (2-ethylhexyl) peroxypivalate, decanoyl peroxide Peroxide initiators such as t-butylperoxy-2-ethylhexanoate and t-butylperoxybenzoate can be used. These can be used individually by 1 type or in combination of 2 or more types.
- the content (nonvolatile content) of the liquid acrylic polymer (f) in the composition of the present invention is preferably 0.01 to 5 parts by weight with respect to 100 parts by weight of the nonvolatile content in the composition of the present invention.
- the amount is more preferably 0.03 to 5 parts by weight, still more preferably 0.05 to 2 parts by weight.
- the liquid acrylic polymer (f) may be a copolymer of the acrylate having an alkyl group having 4 to 18 carbon atoms and another monomer copolymerizable with the acrylate.
- Examples of other monomers copolymerizable with the acrylate having an alkyl group having 4 to 18 carbon atoms include methyl (meth) acrylate, ethyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, 2- Ethoxyethyl (meth) acrylate, phenoxyethyl (meth) acrylate, 2- (2-ethylhexaoxy) ethyl (meth) acrylate, 1-methyl-2-methoxyethyl (meth) acrylate, 3-methoxybutyl (meth) acrylate , 3-methyl-3-methoxybutyl (meth) acrylate, m-methoxyphenyl (meth) acrylate, p-methoxyphenyl (meth) acrylate, o-methoxyphenylethyl (meth) acrylate, m-methoxyphenylethyl (meth) Acrylate,
- (Meth) acrylic acid ester monomer 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxy Hydroxyl-containing monomers such as propyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate; 2-hydroxyethyl (meth) acrylate and ethylene oxide, propylene oxide, ⁇ -butyrolactone or Adducts with ⁇ -caprolactone, etc .; Dimers or trimers such as 2-hydroxyethyl (meth) acrylate or 2-hydroxypropyl (meth) acrylate; Monomers having a plurality of hydroxyl groups such as glycerol (meth) acrylate ; Primary or secondary amino group-containing vinyl monomers such as butylaminoethyl methacrylate and (meth) acrylamide; dimethylaminoethyl (meth) acrylate, diethylaminoeth
- the other monomer copolymerizable with the acrylate having an alkyl group having 4 to 18 carbon atoms can be used alone or in combination of two or more.
- liquid acrylic polymer (f) is a copolymer of the acrylate having an alkyl group having 4 to 18 carbon atoms and another monomer copolymerizable with the acrylate
- “acrylic polymer” Is 55% by weight with respect to 100% by weight of the synthetic raw material monomer, when the acrylate and the other monomer capable of copolymerization contain acrylate as the synthetic raw material monomer of the copolymer.
- the polymer obtained by using the above preferably 70% by weight or more, and more preferably 80% by weight or more.
- the alkyl group having 4 to 12 carbon atoms is preferable, and the alkyl group having 4 to 8 carbon atoms is more preferable, from the viewpoint of obtaining a composition with excellent balance in properties.
- the liquid acrylic polymer (f) adheres to the base material and spray dust, the liquid acrylic polymer (f) is a composition excellent in balance with the property that it is difficult to reduce the adhesiveness of the film formed thereon to the object to be coated. It is preferable to contain a structural unit derived from an acrylate having a branched alkyl structure having 4 to 18 carbon atoms, and from an acrylate having a branched structure having 4 to 12 carbon atoms.
- structural units derived from isobutyl acrylate or 2-ethylhexyl acrylate more preferably structural units derived from isobutyl acrylate or 2-ethylhexyl acrylate, and n-butyl acrylate It is particularly preferred to contain structural units derived from Chill acrylate and n- butyl acrylate-derived structural units, or, it is particularly preferred that it include a structural unit derived from 2-ethylhexyl acrylate.
- the liquid acrylic polymer also preferably contains structural units derived from isobutyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate.
- the liquid acrylic polymer (f) contains a structural unit derived from an acrylate having a C 4-18 alkyl group having a branched structure
- the liquid acrylic polymer (f) is excellent in adhesion and anticorrosion to the substrate, and adheres as spray dust.
- carbon having a branched structure with respect to 100% by weight of the entire liquid acrylic polymer (f) is obtained from the standpoint that a composition in which the adhesion of the film formed thereon to the coating object is difficult to be reduced is obtained.
- An acrylate-derived structural unit having an alkyl group of several 4 to 18 is preferably contained in an amount of 30 to 100% by weight, more preferably 40 to 100% by weight, and particularly preferably 50 to 100% by weight.
- the structural unit derived from isobutyl acrylate or 2-ethylhexyl acrylate is preferably contained in an amount of 30 to 100% by weight, more preferably 40 to 100% by weight, and more preferably 45 to 100% by weight. It is particularly preferred that
- liquid acrylic polymer (f) contains a structural unit (i) derived from isobutyl acrylate or 2-ethylhexyl acrylate and a structural unit (ii) derived from n-butyl acrylate, adhesion to the substrate and anticorrosion
- the liquid acrylic polymer (f) as a whole is obtained from the standpoint that, even if it adheres as spray dust, it is difficult to reduce the adhesiveness of the film formed thereon to the coating object.
- the total of the structural unit (i) and the structural unit (ii) is preferably 30 to 100% by weight, more preferably 50 to 100% by weight, and particularly preferably 75 to 100% by weight with respect to the weight%.
- the ratio of the structural unit (i) to the structural unit (ii) (structural unit (i): structural unit (ii)) is preferably 10:90 to 99: 1, more preferably Alternatively, the structural unit (i) and the structural unit (ii) may be included so as to be 10:90 to 90:10 (provided that the total of the structural unit (i) and the structural unit (ii) is 100). desirable.
- the composition preferably contains extender pigment (g).
- extender pigment (g) examples include barium sulfate, potassium feldspar, barite powder, silica, calcium carbonate, talc, mica, and glass flakes. Such extender pigments (g) may be used alone or in combination of two or more.
- composition of the present invention contains at least a flat pigment (h) as the extender pigment (g) from the viewpoint that it can form an anticorrosion coating excellent in anticorrosion properties, salt water resistance, high temperature moisture resistance and the like. It is preferable.
- Examples of such a flat pigment (h) include mica, glass flakes, and the like. From the standpoint of being able to form an anticorrosion coating film that is inexpensive and excellent in availability and more excellent in the above effects, preferable.
- the said flat pigment (h) may be used individually by 1 type, and may be used in combination of 2 or more type.
- a high aspect ratio mica having an aspect ratio of 30 to 90 is preferable from the viewpoint of improving the swelling resistance of the resulting anticorrosion coating film, reducing creep properties, and relaxing internal stress.
- Specific mica includes “Suzolite Mica 200HK” (manufactured by West Japan Trading Co., Ltd., aspect ratio: 40 to 60).
- the blending amount of the extender pigment (g) is preferably 5 to 80 weights with respect to 100 parts by weight of the nonvolatile content of the composition of the present invention. Parts, more preferably 10 to 70 parts by weight.
- the blending amount when the flat pigment (h) is blended among the extender pigments (g) is such that the performance of the anticorrosion coating such as water corrosion resistance and flex resistance is improved.
- the amount is preferably 1 to 40 parts by weight, more preferably 3 to 20 parts by weight with respect to 100 parts by weight of the nonvolatile content of the composition.
- Color pigment Specific examples of the color pigment include titanium white, red rose, yellow red rose, and carbon black.
- the said color pigment may be used individually by 1 type, and may be used in combination of 2 or more type.
- the amount of the color pigment is preferably 0.1 to 15 parts by weight, more preferably 100 parts by weight of the nonvolatile content of the composition of the present invention. Is 0.5 to 10 parts by weight.
- the extender pigment (g) and the color pigment are preferably in an amount such that the pigment volume concentration (PVC) in the anticorrosive coating film formed from the composition of the present invention is preferably 10 to 75% by volume, preferably It is desirable from the standpoint of anticorrosion properties and the like to be contained in the composition of the present invention in an amount of 25 to 50% by volume.
- PVC pigment volume concentration
- the anti-sagging / anti-settling agent (compound other than the amide wax (e)) can impart thixotropy to the composition of the present invention and improve the adhesion of the composition to the substrate.
- the amide wax (e) is also an anti-sagging / anti-settling agent, but the composition of the present invention may further contain an anti-sagging / anti-settling agent as required.
- the anti-sagging / precipitating agent is not particularly limited, and examples thereof include organic thixotropic agents and inorganic thixotropic agents.
- the said anti-sagging / precipitating agent may be used alone or in combination of two or more.
- organic thixotropic agent examples include hydrogenated castor oil type, polyethylene oxide type, vegetable oil polymerized oil type, surfactant type thixotropic agent, or thixotropic agents using two or more of these in combination.
- Examples of the inorganic thixotropic agent include finely divided silica, bentonite, silica whose surface is treated with a silane compound, bentonite (organic bentonite) whose surface is treated with a quaternary ammonium salt, and the like, ultrafine surface treatment. Calcium carbonate or a mixture thereof can be mentioned.
- silica fine powder pulverized by a dry method for example, product name: Aerosil 300 manufactured by Nippon Aerosil Co., Ltd.
- silica fine powder was modified with hexamethyldisilazane.
- Fine powder for example, Nippon Aerosil Co., Ltd., trade name: Aerosil RX300
- fine powder obtained by modifying silica fine powder with polydimethylsiloxane for example, Nippon Aerosil Co., Ltd., trade name: Aerosil RY300
- fine powder silica And silica fine particles treated with dimethyldichlorosilane (Nippon Aerosil Co., Ltd., trade name: Aerosil R972)
- organic bentonite Organic bentonite (Elementis Specialties, Inc., trade name: Benton SD-2), and the like.
- silica whose surface is treated with a silane compound, quaternary ammonium salt, and the like from the standpoint that a composition having excellent adhesion to a substrate is obtained. It is preferable to use together bentonite whose surface has been treated with.
- the anti-sagging / anti-settling agent of the anti-sag / anti-settling agent is obtained from the viewpoint of obtaining a composition having excellent coating viscosity, coating workability, and storage stability.
- the amount is preferably 0.1 to 5 parts by weight, more preferably 0.3 to 2 parts by weight with respect to 100 parts by weight of the nonvolatile content of the composition of the present invention.
- the total content of the amide wax (e) and the anti-sagging / precipitating agent in the composition of the present invention is excellent in anti-sagging properties, so that the non-volatile content of the composition of the present invention is 100 parts by weight.
- the amount is preferably 0.3 to 6 parts by weight, more preferably 0.5 to 3 parts by weight.
- the mass ratio of the content of the amide wax (e) and the anti-sagging / precipitating agent in the composition of the present invention content of the amide wax (e): anti-sagging / precipitating
- the content of the agent is preferably 10:90 to 90:10, and more preferably 15:85 to 85:15 (however, amide wax (e) is used to prevent sagging and settling)
- the total of the agents is 100).
- the solvent is not particularly limited, and a conventionally known solvent can be used, and examples thereof include xylene, toluene, methyl isobutyl ketone, methyl ethyl ketone, butyl acetate, butanol, isopropyl alcohol, 1-methoxy-2-propanol and the like. .
- solvents may be used alone or in combination of two or more.
- the blending amount of the solvent is not particularly limited, and may be appropriately adjusted according to the coating method when the composition of the present invention is coated. Considering the paintability of the product, it is desirable that the non-volatile content of the composition of the present invention is contained in an amount such that it is preferably 55 to 98% by weight, more preferably 65 to 95% by weight.
- the concentration of the non-volatile content of the composition of the present invention is preferably 55 to 95% by weight, more preferably 65 from the viewpoint of paintability and the like. It is desirable that it be contained in an amount of 90% by weight.
- the composition of the present invention preferably contains a plasticizer from the viewpoint of improving the flexibility and weather resistance of the resulting anticorrosion coating film.
- the said plasticizer may be used individually by 1 type, and may be used in combination of 2 or more type.
- liquid hydrocarbon resins such as low boiling fractions obtained by thermally decomposing naphtha, petroleum resins solid at room temperature, xylene resins, coumarone indene resins, etc. Is mentioned. Specific examples include liquid hydrocarbon resins and flexibility imparting resins described in JP-A-2006-342360.
- liquid hydrocarbon resins and hydroxyl-containing solid petroleum resins, xylene resins and coumarone indene resins are preferable because they are compatible with the epoxy resin (a).
- liquid hydrocarbon resins include “Nesiles EPX-L”, “Nesiles EPX-L2” (hereinafter, NEVCIN / phenol-modified hydrocarbon resin), “HIRENOL PL-1000S” (manufactured by KOLON Chemical / Liquid hydrocarbon resins) and petroleum-based resins that are solid at room temperature include “Neopolymer E-100”, “Neopolymer K-2”, “Neopolymer K3” (Shin Nippon Petrochemical Co., Ltd.) (Manufactured by C9 series hydrocarbon resin) and coumarone indene resin are commercially available as “NOVARES CA 100” (Rutgers Chemicals AG), and as xylene resin as “Nicanol Y-51” (Mitsubishi Gas Chemical ( Etc.).
- the blending amount of the plasticizer is the composition 100 of the present invention from the viewpoint that an anticorrosive coating film having excellent weather resistance and crack resistance is obtained.
- the amount is preferably 1 to 50 parts by weight, more preferably 3 to 30 parts by weight with respect to parts by weight.
- composition of the present invention contains a curing accelerator capable of contributing to adjustment of the curing speed, particularly acceleration.
- curing accelerator examples include tertiary amines. These curing accelerators may be used alone or in combination of two or more.
- triethanolamine, dialkylaminoethanol, triethylenediamine [1,4-diazacyclo (2,2,2) octane], 2,4,6-tri (dimethylaminomethyl) phenol (example: commercial product)
- These curing accelerators are preferably blended in the composition of the present invention in an amount of 0.05 to 2.0% by weight.
- the curing accelerator is a two-component composition in which the composition of the present invention comprises a main component and a curing agent component (that is, a composition prepared by mixing the components of the two-component paint). ) Or a multi-component composition (that is, a composition prepared by mixing the components of the multi-component paint), the curing accelerator is included in the curing agent component, and the curing agent component
- the content is preferably 0.1 to 15% by weight, more preferably 0.1 to 10% by weight.
- the anticorrosive coating composition of the present invention is a two-component composition (that is, a composition prepared by mixing each component of the two-component paint) or a multi-component composition of a main component and a curing agent component.
- the curing agent component is used in an amount of 2 to 200 parts by weight, preferably 100 parts by weight of the main component. Blended in an amount of 5-50 parts by weight, particularly preferably 8-40 parts by weight, and properly blended so that the volume solid (volume non-volatile content%) is 50-100% by volume, preferably 65-85% by volume. It is desirable to prepare it.
- the anticorrosion coating film of the present invention is not particularly limited as long as it is formed from the composition of the present invention.
- a coating film is formed by applying the composition of the present invention on a substrate, and the coating composition is applied. It is preferable that the film is obtained by drying and curing the film.
- Such anticorrosion coatings have excellent anticorrosion properties such as salt water resistance and high temperature and humidity resistance, adhesion to the substrate, and even if formed by painting with a brush or roller, It is excellent in the property that foam does not easily remain.
- the base material is not particularly limited, but is preferably a base material that is required to have anticorrosion properties because the effects of the present invention can be further exhibited.
- Such a base material is preferably a metal base material made of steel, non-ferrous metal (zinc, aluminum, stainless steel, etc.), a ship, a land structure, a structure such as a bridge made of these, more preferably a ship structure. Is mentioned.
- a ballast tank is more preferable.
- the ballast tank may be provided with an anticorrosion by installing an anode such as zinc or zinc-aluminum.
- the current density during the anticorrosion is preferably 1 to 10 mA / m 2 .
- the substrate in order to remove rust, fats and oils, moisture, dust, slime, salt, etc., and to improve the adhesion of the resulting anticorrosive coating film, the substrate surface is treated as necessary (for example, Blasting treatment (ISO8501-1, Sa2 1/2), friction method, treatment to remove oil and dust by degreasing, etc. may be used.
- Blasting treatment ISO8501-1, Sa2 1/2
- friction method treatment to remove oil and dust by degreasing, etc.
- a thin film-forming coating material such as a conventionally known primary anti-corrosion coating material (shop primer), other primers, or the like may be applied to the substrate surface and dried.
- the method for applying the composition of the present invention on a substrate is not particularly limited, and a conventionally known method can be used without limitation.
- the method for drying and curing the coating film is not particularly limited, and the coating film may be dried and cured by heating at about 5 to 60 ° C. in order to shorten the drying and curing time.
- the coating film is dried and cured by leaving it in the atmosphere for about 1 to 14 days.
- the anticorrosion method for the substrate of the present invention is not particularly limited as long as it includes the step of applying the composition of the present invention on the substrate, but the coating film is formed by applying the composition of the present invention on the substrate.
- a method of preventing corrosion of the substrate by forming the coating film and drying and curing the coating film is preferable.
- the substrate, coating method, etc. in this method may be the same as those described in the column of the anticorrosion coating film.
- a conventionally known top coat such as an antifouling paint may be applied on the obtained coating or anticorrosion coating, and dried and cured, depending on the desired application. Good.
- the anti-corrosion method of the ballast tank is performed as follows.
- the composition of the present invention is spray-coated on the ballast tank (the first coating), and after the coating film has dried, a stripe coat is applied to the weld line and edge portion where it is difficult to ensure the film thickness with a brush or roller. Then, the above composition is spray-coated again (second coating) to form an anticorrosion coating film having a thickness of about 320 ⁇ m.
- This type of anti-corrosion method for ballast tanks must be applied with a brush or roller, so that not only spray work but also painting work with a brush or roller is necessary.
- the coating must be formed in a healthy state free of foam and pinholes. As described above, foaming on the surface of the coating film can be suppressed by using the composition of the present invention even when the surface of the coating film is coated with a brush or roller that easily generates foam.
- ⁇ ⁇ The number of remaining foams is 10 or more and less than 2 per 10 cm 2 .
- ⁇ The number of remaining foams per 10 cm 2 is 2 or more and less than 5.
- X The number of remaining foams per 10 cm 2 is 5 or more.
- test plate a blasted steel plate having dimensions of 150 mm ⁇ 70 mm ⁇ 1.6 mm (thickness).
- the test plate with the anticorrosion coating film was spray-coated so as to have a thickness of about 250 ⁇ m, and the obtained test plate with the anticorrosion coating film was dried in an atmosphere of 23 ° C. and 50% RH for 7 days to prepare a test plate with the anticorrosion coating film.
- the appearance of the anticorrosion coating after the test plate with the anticorrosion coating was immersed in 3% salt water at 40 ° C. for 90 days was visually evaluated according to the following criteria. (Evaluation criteria) ⁇ : No change in swelling, cracking, rust, peeling, or hue.
- ⁇ Slight defects (changes) are observed in any of blisters, cracks, rust, peeling, and hue.
- Electrocorrosion resistance test The zinc anode was connected to a test plate with an anticorrosion coating prepared in the same manner as the salt water resistance test so that the electric current density was 5 mA / m 2 or less.
- the appearance of the anticorrosion coating after being immersed in 3% salt water for 90 days was visually evaluated according to the following criteria. (Evaluation criteria) ⁇ : No change in swelling, cracking, rust, peeling, or hue.
- ⁇ Slight defects (changes) are observed in any of blisters, cracks, rust, peeling, and hue.
- ⁇ Slight defects (changes) are observed in any of blisters, cracks, rust, peeling, and hue.
- High-temperature and high-humidity test The high-temperature and high-humidity resistance of the anticorrosion coating was measured according to JIS K-5600 7-2. Specifically, it was performed as follows.
- ⁇ Slight defects (changes) are observed in any of blisters, cracks, rust, peeling, and hue.
- Adhesion on spray dust adhesion surface was evaluated according to JIS K-5400 8.5.3. Specifically, it was performed as follows.
- a test plate having a size of 150 ⁇ 70 ⁇ 1.6 (thickness) mm is placed so that the surface thereof is substantially perpendicular to gravity, and the thickness of the resulting anticorrosion coating film is 160 ⁇ m.
- Each of the anticorrosion coating compositions obtained in the comparative examples was applied to obtain a test plate with a coating film.
- the same composition as the composition that formed the coating film was applied by spray coating from a height of about 1.5 m above the test plate.
- a composition that became spray dust was deposited by drying on about 95% of the surface area of the membrane.
- the test plate to which the composition that became the spray dust adhered was dried for one day in an atmosphere of 23 ° C. and 50% RH.
- the same composition as the composition on which the anticorrosion coating film was formed was again spray-coated so that the dry film thickness was about 160 ⁇ m, and the temperature was 23 ° C. and 50% RH.
- a test plate with an anticorrosion coating film having a thickness of about 320 ⁇ m was obtained by drying in an atmosphere for 7 days.
- the conditions for adhering the composition that becomes the spray dust are conditions for reproducing conditions similar to an example of the condition for adhering the spray dust that may be generated when the composition of the present invention is used in an actual field. .
- peeling rate peeling rate between the anticorrosion coatings was evaluated according to the following criteria. A description will be given along FIG.
- An X-shaped cut 2 was made on one surface of the anticorrosive coating film of the obtained test plate with anticorrosion coating film. At this time, the area in the square connecting the four ends of the two cuts of the cut 2 was defined as the cut-in area 3.
- a cellophane adhesive tape is applied on the X-shaped notch, and one end of the tape is peeled off at an angle close to 90 ° with respect to the surface of the anticorrosive coating, thereby evaluating the peeling state (peeling rate) between the anticorrosive coatings. did.
- the ratio of the anticorrosive coating film peeled off from the test plate with respect to the area 3 where the cut was made after the tape was peeled was roughly estimated by visual observation. (Evaluation criteria) ⁇ : No peeling is observed. ⁇ ⁇ : 10% or less of the whole is peeled off.
- ⁇ More than 10% to 20% or less of the whole is peeled off.
- the liquid acrylic resin (Note 15) was prepared as follows.
- the butyl acetate solution of the acrylic type copolymer was prepared by cooling to 60 degrees C or less.
- the obtained solution had a heating residue of 50%.
- the weight average molecular weight (Mw) measured by GPC of the acrylic copolymer obtained by extracting a part of the obtained solution and evaporating the solvent was about 15,000, and was measured by DSC.
- the glass transition temperature was about -36 ° C.
- Example 1 As shown in Table 2 below, in a container, 19 parts by weight of epoxy resin (Note 1), 10 parts by weight of petroleum resin (Note 3), 4 parts by weight of liquid petroleum resin (Note 5), 9.5 parts by weight of xylene, butanol 2 parts by weight, 1 part by weight of 1-methoxy-2-propanol, 1 part by weight of silane coupling agent (Note 6), 23 parts by weight of talc (Note 7), 6 parts by weight of mica (Note 8), potassium feldspar (Note 9) ) 15 parts by weight, titanium white (Note 10) 6 parts by weight, yellow petrol (Note 11) 1.5 parts by weight, sagging agent (Note 12) 1.5 parts by weight and a poly ⁇ -olefin having a branched structure ( Note 16) 0.5 part by weight was added, glass beads were added thereto, and these ingredients were mixed using a paint shaker. Next, the glass beads were removed, dispersed at 56-60 ° C. using a high
- a composition was prepared by mixing 100 parts by weight of the obtained main agent component and 15 parts by weight of the curing agent component before coating.
- Example 2 to 8 and Comparative Examples 1 to 7 A composition was prepared in the same manner as in Example 1 except that the components and amounts to be blended in the main component and the curing agent component were changed as shown in Table 2 below.
- Anticorrosion coating film 2 X-shaped cut 3: Area with cut
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Abstract
Description
前記主剤成分がエポキシ樹脂(a)を含み、前記硬化剤成分が硬化剤(b)を含み、前記主剤成分または前記硬化剤成分の少なくとも一方が炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含む2成分型塗料。
前記主剤成分がエポキシ樹脂(a)を含み、前記硬化剤成分が硬化剤(b)を含み、前記主剤成分、前記硬化剤成分または前記他の成分の少なくとも1つが炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含む多成分型塗料。
エポキシ樹脂(a)および炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含有する主剤成分。
硬化剤(b)および炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含有する硬化剤成分。
本発明の防食塗料組成物(以下、単に「本発明の組成物」ともいう。)は、エポキシ樹脂(a)、硬化剤(b)、および炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含有する。
前記エポキシ樹脂(a)としては、特に制限されず、例えば、特開平11-343454号公報や特開平10-259351号公報に記載の非タール系エポキシ樹脂が挙げられる。
常温で半固形状のものとして、「jER-834」(三菱化学(株)製、ビスフェノールA型エポキシ樹脂、エポキシ当量230~270)、「E-834-85X」(大竹明新化学(株)製、ビスフェノールA型エポキシ樹脂のキシレン溶液(834タイプエポキシ樹脂溶液)、エポキシ当量約300)等が挙げられ、
常温で固形状のものとして、「jER1001」(三菱化学(株)製、ビスフェノールA型エポキシ樹脂、エポキシ当量450~500)、「E-001-75」(大竹明新化学(株)製、ビスフェノールA型エポキシ樹脂のキシレン溶液(1001タイプエポキシ樹脂溶液)、エポキシ当量約630)等が挙げられる。前記エポキシ樹脂(a)は、1種単独でまたは2種以上を組み合わせて用いることができる。
前記硬化剤(b)としては、特に制限されず、アミン硬化剤およびカルボン酸系硬化剤が挙げられるが、中でも、脂肪族系、脂環族系、芳香族系、複素環系などのアミン硬化剤が好ましい。
前記ポリα-オレフィン(c)は、炭素数6以上のα-オレフィン由来の構造単位を含み、好ましくは50~100モル%、さらに好ましくは70~100モル%のα-オレフィン由来の構造単位を含む。
本発明の組成物中には、前記成分(a)~(c)の他に、必要に応じて、シランカップリング剤(d)、アマイドワックス(e)、液状アクリルポリマー(f)、体質顔料(g)、着色顔料、タレ止め・沈降防止剤、溶媒、可塑剤、硬化促進剤、無機脱水剤(安定剤)、防汚剤等を、本発明の目的を損なわない範囲で配合してもよい。
前記シランカップリング剤(d)を用いることで、得られる防食塗膜の基材への密着性をさらに向上させることができるのみならず、得られる防食塗膜の耐塩水性等の防食性をも向上させることができるため、本発明の組成物はシランカップリング剤(d)を含むことが好ましい。
前記アマイドワックス(e)としては、特に制限されないが、植物油脂肪酸とアミンより合成されるアマイドワックスが挙げられる。
前記液状アクリルポリマー(f)は、炭素数4~18のアルキル基を有するアクリレート由来の構造単位を含む。
前記体質顔料(g)を用いることで、得られる組成物のコスト面におけるメリットのみならず、防食性、耐塩水性および高温耐湿性等に優れる防食塗膜を形成することができるため、本発明の組成物は体質顔料(g)を含むことが好ましい。
前記着色顔料としては、具体的には、チタン白、ベンガラ、黄色ベンガラ、カーボンブラック等が挙げられる。前記着色顔料は、1種単独で用いてもよく、2種以上を組み合わせて用いてもよい。
前記タレ止め・沈降防止剤(アマイドワックス(e)以外の化合物)は、本発明の組成物に揺変性(チクソトロピー)を付与し、該組成物の基材への密着性を向上させることができる。前記アマイドワックス(e)もタレ止め・沈降防止剤であるが、本発明の組成物は、必要に応じてさらにタレ止め・沈降防止剤を含有していてもよい。
前記溶媒としては、特に限定されず、従来より公知の溶媒が使用でき、例えば、キシレン、トルエン、メチルイソブチルケトン、メチルエチルケトン、酢酸ブチル、ブタノール、イソプロピルアルコール、1-メトキシ-2-プロパノール等が挙げられる。
本発明の組成物には、得られる防食塗膜の柔軟性および耐侯性等を向上させる等の点から、可塑剤を配合することが好ましい。前記可塑剤は、1種単独で用いてもよく、2種以上を組み合わせて用いてもよい。
本発明の組成物には、硬化速度の調整、特に促進に寄与できる硬化促進剤が含有されていることが好ましい。
本発明の防食塗膜は、前記本発明の組成物から形成されたものであれば特に制限されないが、基材上に前記本発明の組成物を塗布することで塗膜を形成し、該塗膜を乾燥、硬化させることで得られたものであることが好ましい。
本発明の基材の防食方法は、基材上に、前記本発明の組成物を塗布する工程を含めば特に制限されないが、基材上に前記本発明の組成物を塗布することで塗膜を形成し、該塗膜を乾燥、硬化させることで基材を防食する方法が好ましい。
寸法が300mm×300mm×0.05mm(厚)のブリキ板(以下、「試験板」ともいう。)に、塗料の混合物粘度をキシレンで2.0Pa・sに調整し、刷毛で150μm~200μmの膜厚で塗装し、得られた塗膜付試験板を、23℃、50%RHの雰囲気で1日間乾燥させた後、塗膜外観を評価した。
(評価基準)
○ :10cm2あたり、泡沫の残存個数が1個未満。
防食塗膜の耐塩水性を、JIS K-5600 6-1に準拠して測定した。具体的には以下のようにして行った。
(評価基準)
○:フクレ、割れ、サビ、はがれ、色相のいずれも変化なし。
電気電流密度が5mA/m2以下になるよう、亜鉛陽極を、耐塩水性試験と同様にして作成した防食塗膜付試験板に接続し、この試験板を40℃の3%塩水中に90日間浸漬した後の防食塗膜の外観を以下の基準に従って目視評価した。
(評価基準)
○:フクレ、割れ、サビ、はがれ、色相のいずれも変化なし。
JIS K-5600 7-1に準拠して、耐塩水性試験と同様にして作成した防食塗膜付試験板に、35℃の条件下で、塩水濃度5%の溶液を連続的に90日間噴霧した後の防食塗膜の外観を以下の基準に従って目視評価した。
(評価基準)
○:フクレ、割れ、サビ、はがれ、色相のいずれも変化なし。
防食塗膜の耐高温高湿性を、JIS K-5600 7-2に準拠して測定した。具体的には以下のようにして行った。
(評価基準)
○:フクレ、割れ、サビ、はがれ、色相のいずれも変化なし。
スプレーダスト付着面上への付着性の評価を、JIS K-5400 8.5.3に準拠して実施した。具体的に以下のようにして行った。
(評価基準)
○ :全く剥離が認められない
○△:全体の10%以下が剥離している。
下記表2に示すように、容器に、エポキシ樹脂(注1)19重量部、石油樹脂(注3)10重量部、液状石油樹脂(注5)4重量部、キシレン9.5重量部、ブタノール2重量部、1-メトキシ-2-プロパノール 1重量部、シランカップリング剤(注6)1重量部、タルク(注7)23重量部、マイカ(注8)6重量部、カリ長石(注9)15重量部、チタン白(注10)6重量部、黄色弁柄(注11)1.5重量部、タレ止め剤(注12)1.5重量部および分岐構造を有するポリα-オレフィン(注16)0.5重量部を入れ、そこにガラスビーズを添加し、ペイントシェーカーを用いてこれらの配合成分を混合した。次いで、ガラスビーズを取り除き、ハイスピードディスパーを用い56~60℃で分散後、30℃以下まで冷却し、主剤成分を調製した。
主剤成分および硬化剤成分に配合する成分および配合量を下記表2に示すように変更した以外は実施例1と同様にして組成物を調製した。
2:X字状の切り込み
3:切り込みを入れた面積
Claims (16)
- エポキシ樹脂(a)、硬化剤(b)、及び炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含有する防食塗料組成物。
- 前記防食塗料組成物中の不揮発分100重量部に対して、前記ポリα-オレフィン(c)を0.01~5重量部(不揮発分)の量で含む、請求項1に記載の防食塗料組成物。
- さらに、シランカップリング剤(d)を含む、請求項1または2に記載の防食塗料組成物。
- さらに、アマイドワックス(e)と液状アクリルポリマー(f)とを含む、請求項1~3の何れか1項に記載の防食塗料組成物。
- 前記液状アクリルポリマー(f)が、分岐構造を含む炭素数4~18のアルキル基を有するアクリレート由来の構造単位を含有する、請求項4に記載の防食塗料組成物。
- 前記液状アクリルポリマー(f)が、イソブチルアクリレートまたは2-エチルヘキシルアクリレート由来の構造単位を含む、請求項4または5に記載の防食塗料組成物。
- 前記防食塗料組成物中の不揮発分100重量部に対して、液状アクリルポリマー(f)を0.01~5重量部(不揮発分)の量で含む、請求項4~6の何れか1項に記載の防食塗料組成物。
- 前記液状アクリルポリマー(f)のガラス転移温度が0℃以下である、請求項4~7の何れか1項に記載の防食塗料組成物。
- さらに、体質顔料(g)を含む、請求項1~8の何れか1項に記載の防食塗料組成物。
- 前記体質顔料(g)が、少なくとも扁平状顔料(h)を含む、請求項9に記載の防食塗料組成物。
- 請求項1~10の何れか1項に記載の防食塗料組成物から形成された防食塗膜。
- 基材上に、請求項1~10の何れか1項に記載の防食塗料組成物を塗布する工程を含む、基材の防食方法。
- 互いに接触しないように収容された主剤成分と硬化剤成分との組み合わせからなる2成分型塗料であって、
前記主剤成分がエポキシ樹脂(a)を含み、前記硬化剤成分が硬化剤(b)を含み、前記主剤成分または前記硬化剤成分の少なくとも一方が炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含む2成分型塗料。 - 互いに接触しないように収容された主剤成分と硬化剤成分と少なくとも1つの他の成分との組み合わせからなる多成分型塗料であって、
前記主剤成分がエポキシ樹脂(a)を含み、前記硬化剤成分が硬化剤(b)を含み、前記主剤成分、前記硬化剤成分または前記他の成分の少なくとも1つが炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含む多成分型塗料。 - 硬化剤(b)を含む硬化剤成分と混合して請求項1に記載の防食塗料組成物を製造するための主剤成分であって、
エポキシ樹脂(a)および炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含有する主剤成分。 - エポキシ樹脂(a)を含む主剤成分と混合して請求項1に記載の防食塗料組成物を製造するための硬化剤成分であって、
硬化剤(b)および炭素数6以上のα-オレフィン由来の構造単位を含むポリα-オレフィン(c)を含有する硬化剤成分。
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JP2016041793A (ja) * | 2014-08-19 | 2016-03-31 | 三井化学株式会社 | 硬化性組成物 |
JP2016041792A (ja) * | 2014-08-19 | 2016-03-31 | 三井化学株式会社 | 硬化性組成物 |
JP2016183206A (ja) * | 2015-03-25 | 2016-10-20 | 三井化学株式会社 | 硬化性組成物およびその製造方法 |
JP2016186021A (ja) * | 2015-03-27 | 2016-10-27 | 大日本塗料株式会社 | 水系エポキシ樹脂塗料組成物、塗装体及び塗装体の製造方法 |
JP2017025158A (ja) * | 2015-07-17 | 2017-02-02 | 中国塗料株式会社 | 防食塗料組成物、防食塗膜、防食塗膜付き基材及びその製造方法 |
JP2017025159A (ja) * | 2015-07-17 | 2017-02-02 | 中国塗料株式会社 | 防食塗料組成物、防食塗膜、防食塗膜付き基材及びその製造方法 |
JP2017119252A (ja) * | 2015-12-28 | 2017-07-06 | 中国塗料株式会社 | 目標膜厚の塗膜の製造方法、塗料組成物、塗膜、塗膜付き基材および膜厚の検査方法 |
JP2017185437A (ja) * | 2016-04-04 | 2017-10-12 | ベック株式会社 | 被膜形成方法 |
JP2018123187A (ja) * | 2017-01-30 | 2018-08-09 | 三井化学株式会社 | 硬化性組成物 |
JP2022040066A (ja) * | 2020-08-26 | 2022-03-10 | 中国塗料株式会社 | 塗料組成物 |
Also Published As
Publication number | Publication date |
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KR101920125B1 (ko) | 2018-11-19 |
EP3037489A4 (en) | 2017-04-12 |
PH12016500340B1 (en) | 2021-09-08 |
CN105492550B (zh) | 2018-09-25 |
CN105492550A (zh) | 2016-04-13 |
US10273366B2 (en) | 2019-04-30 |
KR20160035002A (ko) | 2016-03-30 |
JPWO2015025918A1 (ja) | 2017-03-02 |
JP6125020B2 (ja) | 2017-05-10 |
TW201510128A (zh) | 2015-03-16 |
US20160200916A1 (en) | 2016-07-14 |
PH12016500340A1 (en) | 2016-05-02 |
EP3037489B1 (en) | 2019-12-04 |
TWI553067B (zh) | 2016-10-11 |
EP3037489A1 (en) | 2016-06-29 |
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