WO2005007755A1 - フレーク顔料、それを含む塗料および粉体塗料、それに用いるフレーク粒子の表面処理剤 - Google Patents
フレーク顔料、それを含む塗料および粉体塗料、それに用いるフレーク粒子の表面処理剤 Download PDFInfo
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- WO2005007755A1 WO2005007755A1 PCT/JP2004/009952 JP2004009952W WO2005007755A1 WO 2005007755 A1 WO2005007755 A1 WO 2005007755A1 JP 2004009952 W JP2004009952 W JP 2004009952W WO 2005007755 A1 WO2005007755 A1 WO 2005007755A1
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- flake
- flake pigment
- copolymer
- monomer
- polymerizable monomer
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/62—Metallic pigments or fillers
- C09C1/64—Aluminium
- C09C1/644—Aluminium treated with organic compounds, e.g. polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/62—Metallic pigments or fillers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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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
- C09D5/03—Powdery paints
- C09D5/032—Powdery paints characterised by a special effect of the produced film, e.g. wrinkle, pearlescence, matt finish
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/582—Recycling of unreacted starting or intermediate materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2998—Coated including synthetic resin or polymer
Definitions
- the present invention relates to a flake pigment that gives a coating film a high brightness feeling. More specifically, the present invention relates to a resin composition containing a copolymer having a bonding unit derived from a fluoropolymerizable monomer having a fluorinated alkyl group and a bonding unit derived from a polymerizable monomer having a phosphate group.
- a flake pigment provided with a coating consisting of:
- the present invention also relates to a paint and a powder paint containing the flake pigment. Further, the present invention relates to a surface treatment agent for flake particles, comprising a resin composition containing the above copolymer.
- Conventionally developed methods for producing a powdery metallic paint include a metalole blend method in which a metal flake pigment is sufficiently kneaded with a resin or a coloring pigment in advance by a melting method, and then pulverized to obtain a powder. Dry blending method in which pigments are mixed and applied, and bonded method using resin powder with metal flake pigment adhered to the surface (for example, Patent Document 1, Patent Document 2, Patent Document 3, Patent Document 4).
- the flake pigment is liable to be deformed in the kneading step and the subsequent step of adjusting the particle size of the resin powder by pulverization or the like. Therefore, it is considered that the appearance of the coating film obtained by applying the powdered metallic paint produced by this method is sufficiently good. I can't say. Further, in this production method, when aluminum particles are used as the metallic pigment, there is a problem that the active surface of aluminum is exposed in the pulverization step, and the risk of ignition, dust explosion, and the like is increased.
- the dry blending method has an advantage that the deformation of the metallic pigment is relatively unlikely to occur.
- the metallic pigment when a powder paint is applied by electrostatic coating, the metallic pigment must be charged at the time of application, and when a metallic pigment such as aluminum particles is used as the metallic pigment, the rough pigment is applied.
- the surface of the metallic pigment must be coated with resin.
- the charge ratios of the metallic pigment and the resin powder are different, a separation phenomenon between the resin powder and the metallic pigment is likely to occur during coating.
- the design of the coating film deteriorates, and the metallic pigment content of the powder coating changes before and after coating. If the coating is recovered and used, the color tone changes, and the recycling of the coating is virtually impossible. If it is impossible, there is a problem.
- a method in which a metallic pigment is adhered to the surface of a resin powder by a brush polisher, or a method in which the resin powder is brought into contact with a dispersion medium such as alumina balls coated with the metallic pigment is used.
- a method of transferring and bonding metallic pigments is used. This method has the advantage that the introduction rate of the metallic pigment into the coating film is stable, and the powder coating recovered without adhering to the substrate can be reused.
- the metallic pigment and the resin powder are pressure-bonded by physical stress, so that the metallic pigment is deformed and an excellent metallic feeling is hard to be obtained immediately. Furthermore, since the bonding strength between the resin powders is low, the bonding (blocking) between the resin powders is unlikely to occur. On the other hand, it is difficult to bond all the metallic pigments to the resin powders. Many particles of free metallic pigment that do not bind to the surface also remain.
- a polymer of a phosphoric acid group-containing unsaturated monomer and a perfluorocyclohexyl (meth) acrylate which is a fluorine-based monomer.
- This is a dispersion in which polymer particles are dispersed by a polymer dispersion stabilizer, and the polymer is not dissolved in the solution.
- the outermost layer is adsorbed, regardless of whether the micelle particles are aggregated and coated on the flaky aluminum during the coating process, or whether the micelle is broken and coated as a film. Since the polymer dispersion stabilizer layer is used, the effect of the present invention is greatly affected by the polymer dispersion stabilizer.
- the present inventors have disclosed a method of using an aluminum flake pigment whose surface is coated with a fluorine-based resin containing an alkyl fluoride group in the molecule.
- This method takes advantage of the poor affinity of the fluoroalkyl group for other substances, and floats aluminum flake pigment on the surface of the coating film to convert aluminum flake pigment. It can be arranged parallel to the base material, and an excellent metallic effect can be obtained despite the powder coating.
- the overcoat layer is easily peeled off when overcoat clearing with poor secondary adhesion is performed, or the coating film is damaged.
- the repair layer is easily peeled off even if the same paint is applied to repair such as.
- Patent Document 1 JP-A-51-137725
- Patent Document 2 Japanese Patent Publication No. 57-35214
- Patent Document 3 Japanese Patent Application Laid-Open No. 9-71734
- Patent Document 4 U.S. Pat.No. 4,138,511
- Patent Document 5 Japanese Patent Application Laid-Open No. 2001-29877
- Patent Document 6 JP 2003-213157 A
- a main object of the present invention is to be able to be suitably used in a powder coating, to give an excellent metallic feeling and a high luminance feeling to a coating film, and to further provide good secondary adhesion. It is to provide a flake pigment.
- Another object of the present invention is to provide a paint that gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides good secondary adhesion.
- Still another object of the present invention is to provide a powder coating material which gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides good secondary adhesion.
- Another object of the present invention is to provide a flake which can be suitably used in a powder coating, gives an excellent metallic feeling and a high luminance feeling to a coating film, and further gives a good secondary adhesion.
- An object of the present invention is to provide a surface treatment agent for flake particles for preparing a pigment. Means for solving the problem In order to solve the problems of the prior art, the present inventors have studied various ideas regarding the composition of the resin composition that coats the surfaces of flake particles used as the base particles of the metallic pigment, and have conducted extensive research. Repeated development.
- the present inventor has proposed that the surface of the flake particles is provided with a binding unit derived from a fluoropolymerizable monomer having an alkyl fluoride group and a binding unit derived from a polymerizable monomer having a phosphate group.
- a film made of a resin composition containing a polymer it can be suitably used in powder coatings, and gives a high brightness feeling to the coating film and gives good secondary adhesion.
- the inventors have found that flake pigments can be obtained, and have completed the present invention.
- the flake pigment of the present invention is a flake pigment comprising base particles composed of flake particles, and a single-layer or multiple-layer coating covering the surface of the base particles. At least one of the multiple layers is a resin composition containing a copolymer comprising: a binding unit derived from a fluoropolymerizable monomer having a fluorinated alkyl group; and a binding unit derived from a polymerizable monomer having a phosphate group.
- a resin composition containing a copolymer comprising: a binding unit derived from a fluoropolymerizable monomer having a fluorinated alkyl group; and a binding unit derived from a polymerizable monomer having a phosphate group.
- the copolymer includes a bonding unit derived from a fluoropolymerizable monomer having a fluorinated alkyl group, a bonding unit derived from a polymerizable monomer having a phosphoric acid group, and a type other than the bonding unit. And a binding unit derived from the above polymerizable monomer.
- the fluoropolymerizable monomer having a fluorinated alkyl group is perfluorooctylethyl acrylate
- the polymerizable monomer having a phosphate group is 2-methacryloyloxyshetyl acid phosphate or 2 -Atariloirokishechiru acid phosphate may be.
- a binding unit derived from a fluorine-based polymerizable monomer having a fluorinated alkyl group and one or more polymerizable monomers other than a binding unit derived from a polymerizable monomer having a phosphoric acid group include: It may be styrene or methyl methacrylate.
- the copolymer has a content of the binding unit derived from the fluoropolymerizable monomer having the fluorinated alkyl group of 140 mol. /. And the content of the binding unit derived from the polymerizable monomer having a phosphate group is in the range of 110 to 30 mol%, The amount may be in the range of 1000-500000.
- the copolymer may be a copolymer soluble in a solvent.
- the flake particles may be flake particles made of a material containing aluminum or an aluminum alloy.
- the paint of the present invention is a paint containing the above flake pigment and a binder.
- the powder paint of the present invention is a powder paint containing the flake pigment and a thermosetting resin powder.
- the powder coating of the present invention may be a powder coating containing a thermosetting resin powder in which the above-mentioned flake-like pigment is bonded to the surface via an adhesive binder.
- the surface treatment agent for flake particles of the present invention includes a binding unit derived from a fluoropolymerizable monomer having an alkyl fluoride group and a binding unit derived from a polymerizable monomer having a phosphate group. It is a surface treatment agent for flake particles composed of a resin composition containing a copolymer.
- the flake pigment of the present invention can be suitably used in a powder coating, and gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides good secondary adhesion. It is a flake pigment.
- the paint of the present invention is a paint that gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides good secondary adhesion.
- the powder coating of the present invention is a powder coating that gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides good secondary adhesion.
- the surface treatment agent of the present invention can be suitably used in a powder coating, and imparts an excellent metallic feeling and a high luminance feeling to a coating film, and further provides a good secondary adhesion.
- the flake pigment of the present invention is a flake pigment comprising base particles composed of flake particles, and a single-layer or multiple-layer coating covering the surface of the base particles, wherein at least one of the single-layer or multiple-layer Is a flake pigment comprising a resin composition containing a copolymer having a binding unit derived from a fluoropolymerizable monomer having a fluorinated alkyl group and a binding unit derived from a polymerizable monomer having a phosphoric acid group. Hope that there is ,.
- the flake particles used in the present invention include, but are not particularly limited to, metal flakes such as aluminum, zinc, copper, bronze, nickel, titanium and stainless steel, and alloy flakes thereof.
- metal flakes such as aluminum, zinc, copper, bronze, nickel, titanium and stainless steel, and alloy flakes thereof.
- aluminum flake Has excellent metallic luster, is inexpensive and has a low specific gravity, and is particularly suitable for handling and immediately.
- the average particle size of the aluminum flakes used in the present invention is usually preferably about 11 lOOxm, more preferably 3-60 / im.
- the average thickness is usually preferably about 0.01 to 5 ⁇ , more preferably 0.02 to 2 ⁇ .
- the average particle size exceeds 100 ⁇ , the flake particles protrude to the surface of the coating film, and the smoothness or sharpness of the coated surface tends to decrease, and the average particle size is 1 ⁇ . If it is less than 3, the metallic feeling or glitter tends to decrease. When the average thickness exceeds 5 ⁇ m, the smoothness or sharpness of the coated surface tends to decrease, which may lead to an increase in manufacturing cost. If the ratio is less than the above range, the strength tends to decrease, and it may be difficult to perform the processing during the manufacturing process by applying force.
- the average particle size of the flake particles is determined by calculating a volume average from a particle size distribution measured by a known particle size distribution measuring method such as a laser diffraction method, a micromesh sieve method, a Coulter-Counter-One method.
- the average thickness is calculated from the hiding power and density of the flake metal pigment.
- a grinding aid added at the time of grinding may be adsorbed on the surface of the aluminum flake used in the present invention.
- the grinding aid include fatty acids (oleic acid, stearic acid), aliphatic amines, aliphatic amides, aliphatic alcohols, ester compounds and the like. These suppress unnecessary oxidation of the aluminum flake surface and improve gloss Has an effect.
- the amount of adsorption is preferably less than 2 parts by mass per 100 parts by mass of aluminum flakes. If the amount is more than 2 parts by mass, the surface gloss may be reduced.
- various colorants and coloring pigments can be attached to the surface of the flake particles.
- the colorant and color pigment are not particularly limited, but include, for example, quinatalidone, diketopyrrolopyrrole, isoindolinone, indanthrone, perylene, perinone, anthraquinone, dioxazine, benzimidazolone. , Triphenyl methane quinophthalone, anthrapyrimidine, graphite, permite force, transparent pearlmite force, coloring force, interference force, phthalocyanine, halogenated phthalocyanine, azo pigment (azomethine metal complex, condensed azo, etc.) acid Titanium, carbon black, iron oxide, copper phthalocyanine, condensed polycyclic pigments, and the like.
- quinatalidone diketopyrrolopyrrole
- isoindolinone indanthrone
- perylene perinone
- anthraquinone dioxazine
- benzimidazolone Triphenyl methane
- the method for attaching the color pigment to the flake particles used in the present invention is not particularly limited. After coating the color pigment with a dispersant, the flake particles are mixed with the flake particles by stirring in a nonpolar solvent. The method of attaching is preferred.
- Examples of the above dispersants include benzoic acid, benzoyl butyl, salicylic acid, anthranilic acid, m-aminobenzoic acid, p-aminobenzoic acid, 3-amino-4-methylbenzoic acid, 3,4-diaminobenzoic acid, ⁇ - Aromatic carboxylic acids such as aminosalicylic acid, 1 naphthoic acid, 2 naphthoic acid, naphthenic acid, 3-amino-2-naphthoic acid, caffeic acid, aminocaic acid; ethylenediamine, trimethylenediamine, tetramethylenediamine, Pentamethylenediamine, hexamethylenediamine, 1,7-diaminoheptane, 1,8-diaminooctane, 1,10-diaminodecane, 1,12-diaminododecane, o phenylenediamine, m phenylenedi
- an interference film or the like can be formed on the surface of the flake particles.
- the method is not particularly limited, for example, a method for forming a light interference oxide film on the surface of each particle of metal flakes. Heating metal flakes to about 300-700 ° C in an atmosphere with controlled oxygen content creates a method of forming an air oxide film on the surface, or flake metal pigments are prepared using an oxide precursor such as a transition metal. The method of coating and thermally decomposing is preferred.
- another resin may be interposed between the resin composition disclosed in the present invention and the flake particles, if necessary. Layers can also be formed.
- the method is not particularly limited, but a polymerizable monomer is added to a slurry in which metal flakes are dispersed in an organic solvent, and azobisisobutyronitrile, benzoyl peroxide, etc. are added while heating in an inert gas atmosphere.
- a method is preferred in which the polymerization initiator is added to polymerize the monomer to precipitate a polymer on the surface of the metal flake.
- Examples of the above polymerizable monomers include acrylic acid, methacrylic acid, methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl atalinoleate, cyclohexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxybutyl acrylate, 2-methoxyethyl acrylate, 2-getylaminoethyl acrylate, butyl methacrylate, octyl methacrylate, 1,4-butanediol diatalylate, 6 Xanthanediol diatalylate, 1,9-nonanediol diatalylate, neopentinole glycol diatalylate, tripropylene glycol diatalylate, tetraethylene diol glycol diatalylate, trimethylolpropane triatalylate, tetramethylo
- the flake particles used in the present invention include my strength, surface coloring my strength, glass flakes, surface colored glass flakes, pearl, alumina flakes, colored alumina flakes, silica flakes, colored silica flakes, oxidized iron flakes. , Graphite flakes, hologram pigment flakes, cholesteric liquid crystal polymer flake pigments, etc. Furthermore, they may be used in combination with the above-mentioned metal flakes.
- the role of the alkyl fluoride group in the molecular structure of the copolymer in the present invention is based on the poor affinity of the alkyl fluoride group for other substances. To float. By this effect, the flake pigment can be arranged in parallel to the base material, and an excellent metallic feeling can be obtained.
- fluorinated polymerizable monomer having a fluorinated alkyl group refers to a monomer that can undergo polycondensation or addition polymerization (radical polymerization, anion polymerization, cationic polymerization, or ring-opening polymerization), and is a polymer obtained as a result of polymerization. It contains a fluorinated alkyl group in the skeleton.
- the part of the fluorinated alkyl group may be part or all of the main chain or part or all of the side chain, and there is no particular limitation.
- the above-mentioned fluorine-containing polymerizable monomer having a fluorinated alkyl group may be a polymerizable monomer having a cyclic fluorinated alkyl group, but may be a polymerizable monomer having a linear fluorinated alkyl group. It may be an acidic monomer.
- Examples of the fluorine-based polymerizable monomer which gives a polymer in which the alkyl fluoride group partly or partially constitutes the main chain include tetrafluoroethylene, black trifluoroethylene, vinylidene fluoride, and fluorine-containing polymer.
- Examples include vinyl chloride, hexafluoropropylene, and hexafluoropropylene oxide.
- Examples of the fluorine-based polymerizable monomer which gives a polymer in which the fluorinated alkyl group partly or partially constitutes the side chain include methacrylic acid or acrylate of perfluoroalkyl alcohol, perfluoroalkyl Vinyl ether and the like, specifically, trifluoroethyl methacrylate, 2,2,3,3-tetrafluoropropyl methacrylate, 2,2,3,4,4,4_hexafluorobutyl methacrylate Tarylate, perfluorooctylethyl tallate, trifluoroethylinotalate, 2,2,3,3-tetrafluoropropinoleatalylate, 2,2,3,4,4,4_hexafluoro Powers such as butyl acrylate, perfluorooctyl ethyl acrylate, perfluoropropyl butyl ether and the like are not limited thereto.
- the role of the phosphate group in the molecular structure of the copolymer in the present invention is to make use of the excellent adsorptivity of the phosphate group to adsorb this copolymer to flake particles.
- the phosphate groups can simultaneously improve secondary adhesion.
- the fact that the phosphoric acid group exhibits excellent adsorptivity to the flake particles means that the copolymer can be coated on the flake particles by an adsorption operation. Compared with flakes, a long reaction time and a complicated polymerization process are not necessary for each flake particle variety, and an advantageous process can be provided when industrial production is considered.
- the copolymer may be directly applied to the flake particles by a resin coating method by polymerization as in the past.
- the polymerizable monomer having a phosphoric acid group as referred to herein is a monomer that can undergo polycondensation or addition polymerization (radical polymerization, anion polymerization, or cationic polymerization). It contains.
- Examples of the corresponding monomer include a compound having at least one polymerizable unsaturated bond and one phosphate group in the same molecule.
- 2-methacryloyloxyshethyl acid phosphate, 2-atariloyloxyshethyl acid phosphate, 2-atalyloyloxypropyl acid phosphate, 2-methacryloyloxypropyl acid phosphate Preferred are (meth) atalyloyloxydecyl acid phosphates such as 10-atariloyloxydecyl acid phosphate, 10-methacryloyloxydecyl acid phosphate, and the like (alkyl chain: 2 to 20 carbon atoms). ).
- an equimolar addition product of glycidyl (meth) acrylate and monoalkyl (C 120) phosphoric acid can also be used as the phosphate group-containing unsaturated monomer.
- the copolymer in the present invention must be soluble in a solvent when the surface of the flake particles is coated by an adsorption method as a surface treatment agent. Therefore, the fluorine-containing polymerizable monomer having a fluorinated alkyl group and the polymerizable monomer having a phosphoric acid group are monomers having only one polymerization active site in one molecule (monofunctional monomer).
- One is desirably a linear skeleton polymer.
- a plurality of polymerization active sites are provided, they are generally three-dimensionally crosslinked and insoluble in all solvents. Even if there are a plurality of polymerization active sites, if the molar fraction is very low, a branched skeleton polymer is obtained. In this case, a soluble solvent may be present.
- the polymer skeleton structure such as linear or branched is not particularly limited as long as a soluble solvent is present. Further, the solvent does not affect the flake particles to be treated, and is not particularly limited as long as it is a solvent.
- the copolymer may be a copolymer of a fluorinated polymerizable monomer having a fluorinated alkyl group, a polymerizable monomer having a phosphoric acid group, and one or more other polymerizable monomers.
- the polymerizable monomer of the third component is added to improve solubility.
- the proton of OH having a phosphate group is an active proton, and it is considered that chain transfer is extremely easy when radical polymerization is performed. Therefore, if there is no monomer of the third component, the radical growth terminal force will be chain-transferred to the phosphate group of the polymerized polymer, and it will be three-dimensionally cross-linked and easily insoluble. It is thought that this problem will be solved by using a polymerization method other than the radical polymerization, for example, ionic polymerization, but radical polymerization is preferred from the viewpoint of simplicity of the polymerization operation.
- the third component monomer Since the purpose of adding the third component monomer is to prevent insolubilization due to crosslinking, it is a monomer (monofunctional monomer) having only one polymerization active site in one molecule, similarly to the above two types of monomers. Is preferred.
- Monomers that meet this condition include ethylene, propylene, butene, isobutene, butyl chloride, butyl bromide, vinylidene chloride, acrylonitrile, methacrylonitrile, vinylidene cyanide, butyl acetate, methyl acrylate, methyl methacrylate Tarylate, acrylic acid, methacrylic acid, styrene, atalinoleamide, methyl vinyl ketone, phenyl vinyl ketone, methyl vinyl enoate enole, phenyl enoline enoate enole, phenyl enole vinoreles enolide, N-vinyl olepyrrolidone, Forces such as N-Bull force rubazole etc.
- compositions of the fluorine-containing polymerizable monomer having an alkyl fluoride group and the phosphoric acid group-containing polymerizable monomer in the polymer are as follows. 40 mol% and 1 to 30 mol% power S are preferable, and the number average molecular weight is preferably 1000 to 500,000.
- the composition exceeds the upper limit, the polymer obtained by polymerization tends to be insolubilized. On the other hand, when the amount is less than the lower limit, the appearance of the coating film such as metallic feeling and glitter tends to be extremely reduced. If the number average molecular weight is less than 1000, the adsorptivity is reduced and the metallic feeling of the coating film is extremely reduced. When the number average molecular weight exceeds 500,000, when the treated flake pigment is dispersed in a poor solvent, it tends to agglomerate, making the pigment unsuitable as a powder coating pigment.
- the above monomers may be copolymerized, but the polymerization method is not particularly limited.
- the polymerization method include addition polymerization (radical polymerization, cation polymerization, anion polymerization, and ring-opening polymerization) and polycondensation, and are preferred because radical polymerization can be easily performed.
- radical polymerization there are various techniques such as bulk polymerization, solution polymerization, emulsion polymerization, emulsion polymerization, etc.
- the means in the present invention is not limited.
- the copolymer in the present invention must be soluble in a solvent when the surface of the flake particles is coated by an adsorption method as a surface treatment agent, and from that viewpoint, uniform solution polymerization is required.
- adsorption method as a surface treatment agent
- uniform solution polymerization is required.
- the following description for describing the present invention in more detail is limited to radical homogeneous solution polymerization using a third component.
- Solvents that can be used for polymerization are premised on homogeneous solution polymerization, and are not particularly limited as long as they are capable of dissolving all of the monomer species used and the produced polymer.
- polymerizable monomers having a phosphate group are not so soluble in nonpolar solvents having high polarity. Therefore, ketones such as acetone, methyl ethyl ketone and cyclohexanone, esters such as ethyl acetate and methyl acetate, and alcohols having a C power of S4 or less are preferable. It is not particularly limited to these.
- the amount of the solvent used is preferably an amount corresponding to 5 to 50% in terms of the monomer concentration of the polymerization solution. If it is less than 5%, the polymer yield will be extremely reduced, and if it exceeds 50%, it will be gelled and easily insoluble.
- the polymerization initiator is not particularly limited as long as it is soluble in the solvent selected above.
- examples include azobisisobutyronitrile (AIBN), benzoyl peroxide (BPO), and tamenhydroperoxide, but are not limited thereto.
- the amount of use is not limited, but is preferably in the range of 0.1 to 10%. If it is less than 0.1%, the polymer yield will be extremely reduced, and if it exceeds 10%, it will be oligomerized.
- the appropriate range of the reaction temperature is determined by the type of the initiator used.
- the examples described above are initiators belonging to the category called medium temperature initiators, and a preferred reaction temperature is 40-100 ° C. If the temperature is lower than 40 ° C, the polymerization does not proceed. If the temperature is higher than 100 ° C, the initiator is rapidly decomposed, so that it is difficult to control the reaction.
- the type of initiator there is no limitation on the type of initiator, and there is no limitation on the reaction temperature.
- the appropriate range of the reaction time is determined by the type of the initiator and the reaction temperature. Once the initiator species and reaction temperature are determined, the half-life of the initiator is uniquely determined. A half-life of 0.2 to 4 times is preferable for the reaction time. If it is less than 0.2 times, the yield of the polymer will be extremely reduced, and if the reaction is continued for more than 4 times, the yield will not increase much, but it is limited to this
- the method for recovering and purifying the polymerized polymer is not particularly limited.
- the present invention can be achieved even by using a polymerization reaction solution that has not been purified.
- a general reprecipitation method, freeze drying method, column separation method, extraction method and the like can be used, but the reprecipitation method is simple and preferred. The following description for describing the present invention in more detail is limited to the reprecipitation method.
- a solvent that does not dissolve unreacted monomer but precipitates or separates phases is used, the precipitated polymer contains unreacted monomer. It is necessary to extract and remove unreacted monomers with a solvent.
- a solvent an alcohol having a C of 3 or less such as ethanol, methanol and propyl alcohol is preferable, and anolecan such as hexane, heptane and mervue is also exemplified. It is not limited to. In particular, if the monomer species changes, the solvent that satisfies the above conditions changes, so it cannot be limited.
- the type and amount of the poor solvent used in the reprecipitation and the amount of the polymer solution to be added must be controlled on a case-by-case basis depending on the properties and concentration of the produced polymer.
- the control method is the same as in a general polymer reprecipitation purification method.
- the surface treatment agent obtained by the copolymerization is dissolved in a soluble solvent, added to the flake particles, and kneaded.
- a polymerization reaction solution that has not been purified is used as it is, it may be added as it is, or may be added after diluting with a diluting solvent.
- the flake particles may be a solventless powder or a paste containing a solvent.
- the addition amount of the surface treatment agent is preferably 0.1% by mass to 5% by mass based on the flake particles.
- the amount of the added surface treatment agent is not limited to this.
- the solvent is not particularly limited as long as it dissolves the surface treatment agent and does not affect the flake particles.
- the amount of the solvent used is preferably 10% by mass to 400% by mass based on the flake particles (nonvolatile content). If the amount is less than 10% by mass, uniform kneading is difficult. If the amount exceeds 400% by mass, a large amount of poor solvent must be used in the dispersion step described later. However, when using a paste containing a solvent for the raw material flake particles, care must be taken in calculating the required amount of solvent. Since the surface treatment agent solution and the paste are kneaded, the solvent in the mixed system is a mixed solvent. If the mixed solvent does not have a composition that dissolves the surface treating agent, the polymer precipitates out during kneading and hinders uniform adsorption. Therefore, the amount of the solvent used cannot be unconditionally limited.
- the phosphate groups in the surface treating agent molecules are adsorbed to the flake particles during the above-mentioned kneading step. It is thought that aging of the paste after kneading, heating kneading or heating aging, etc. can make adsorption more reliable. However, the effects of the present invention can be achieved without performing any special operation, so that there is no particular limitation.
- the surface treatment agent-containing paste In powderizing the surface treatment agent-containing paste, it is recommended to disperse the paste in a poor solvent, and then filter and dry the paste. If the surface treatment agent-containing paste is dried as it is, the flake particles adhere to each other and aggregate. Although re-grinding can be used sufficiently, it also causes adverse effects such as partial deformation of flake particles during grinding. The above-mentioned aggregation problem can be avoided by washing with a good solvent and drying, but the adsorbed polymer is also gradually washed away, and the effect of the present invention is gradually reduced.
- the above-described problem can be avoided by gradually adding the surface treatment agent-containing paste to a large amount of poor solvent under vigorous stirring to form a slurry, and filtering and drying the slurry. That is, the flake particles are dispersed in the dispersion solvent, and are not in contact with each other. At the same time, the poor solvent extracts the good solvent, and the adsorbed polymer precipitates as a solid on the surface of the flake particles.
- the poor solvent is preferably an alkane such as hexane, heptane, or Mervein.
- the present method is encouraged, it is not an essential step for completing the present invention as described above, and therefore, the powdering method is not limited.
- a step of obtaining a slurry by dispersing flake particles in an organic solvent a step of adding a raw material monomer used in the present invention to the obtained slurry to obtain a reaction solution, A step of adding a polymerization initiator while heating in an inert gas atmosphere to polymerize the raw material monomer to precipitate a copolymer on the surface of the flake particles.
- the solvent in which the flake particles are dispersed is not particularly limited, but a solvent that dissolves the raw material monomer used in the present invention is preferable.
- ester solvents such as ethyl acetate and butyl acetate, acetone, methyl isobutyrate
- ketone solvents such as noreketone and cyclohexanone
- alcohol solvents such as methanol, ethanol, butanol, glycerin, and polyethylene glycol. These solvents may be used alone or as a mixture of two or more.
- the use amount of these solvents is preferably at least 300 parts by mass, more preferably at least 400 parts by mass, per 100 parts by mass of the flake particles. Further, the amount is preferably not more than 1200 parts by mass, and more preferably not more than 800 parts by mass. If the amount used is less than 300 parts by mass, the viscosity of the reaction solution tends to be too high, making it difficult for the reaction components to diffuse uniformly, and if the amount used exceeds 1200 parts by mass, the monomer concentration will decrease. The amount of unreacted monomer will decrease even if the reaction time is prolonged.
- the polymerization initiator used in the flake particle coating method is not particularly limited, and those generally known as radical generators can be used. Specific examples include peroxides such as benzoyl peroxide, lauroyl peroxide, isobutyl peroxide, methylethyl ketone peroxide, and azo compounds such as ⁇ .
- the compounding amount of the polymerization initiator is preferably at least 0.1 part by mass with respect to 100 parts by mass of the charged monomer, and more preferably at least 0.5 part by mass. preferable.
- the amount is preferably 10 parts by mass or less, more preferably 8 parts by mass or less. If the amount is less than 0.1 part by mass, the polymerization reaction may not proceed and a predetermined amount of a film may not be formed.If the amount exceeds 10 parts by mass, the polymerization may rapidly occur. The adsorption of the produced polymer to the flake particles does not catch up, producing free polymer particles, and the viscosity of the entire system rises sharply, and in some cases, solidifies.
- the temperature of the polymerization reaction is determined by the type of the initiator used.
- the half-life of the initiator is uniquely determined by the temperature, and a temperature at which the half-life of the initiator is 5 minutes or more is preferable, and a temperature at which the half-life of the initiator is 15 minutes or more is more preferable.
- the temperature is preferably such that the half-life of the initiator is 20 hours or less. A temperature that is 10 hours or less is more preferable. For example, if AIBN is used as the initiator, the half-life is 60, 70, 80, 90. C, 22, 5, 1.20.3 hours respectively, 70-90 ° C is more preferable temperature range. If the reaction temperature is lower than the preferable temperature range, there may be a problem that the polymerization reaction does not proceed easily. If the reaction temperature is higher than the preferable temperature range, the polymerization reaction proceeds rapidly and flakes of the produced polymer are formed. Adsorption to the particles cannot keep up, producing free polymer particles, and the viscosity of the entire system rises sharply, and in some cases tends to solidify.
- the paint of the present invention contains the flake pigment of the present invention and a binder.
- the paint of the present invention is not limited to a powder paint and may be a general solvent-type paint containing a solvent or a water-based paint containing water.
- the binder used in the paint of the present invention is not particularly limited, and a binder generally used for a paint containing a metallic pigment can be suitably used.
- a binder generally used for a paint containing a metallic pigment can be suitably used.
- Specific examples include an acrylic resin, a polyester resin, an alkyd resin, an epoxy resin, a fluororesin, a lacquer that cures by natural drying, a two-pack polyurethane resin, and a silicone resin.
- these binders may be used alone or in combination of two or more.
- the composition of the solvent is not particularly limited, and a solvent generally used for a paint containing a metallic pigment can be used.
- a solvent generally used for a paint containing a metallic pigment can be used.
- Specific examples include aliphatic hydrocarbon solvents such as hexane, heptane, cyclohexane, and octane; aromatic hydrocarbon solvents such as benzene, toluene, and xylene; and aliphatic hydrocarbons such as mineral spirits.
- halogenated hydrocarbon solvents such as chlorobenzene, trichlorobenzene, perchlorethylene, and trichloroethylene
- alcoholic solvents such as methanol, ethanol, n -propyl alcohol, and n-butanol
- Solvents composed of ketones such as n-propanone and 2-butanone, esters such as ethyl acetate and propyl acetate, and solvents composed of ethers such as tetrahydrofuran, getyl ether and ethyl propyl ether.
- solvents are preferably used as a mixture of two or more solvents. It is determined in consideration of forming characteristics, painting workability, and the like.
- the paint of the present invention can provide a coating film exhibiting excellent brightness even without containing a coloring pigment other than the flake pigment coated with the copolymer of the present invention. It may contain a coloring pigment. In that case, various color tones that cannot be obtained by the flake pigment of the present invention alone can be provided.
- the color pigment that can be used other than the flake pigment coated with the surface treatment agent of the present invention is not particularly limited, and a color pigment generally used in a paint containing a metallic pigment may be used.
- a color pigment generally used in a paint containing a metallic pigment may be used.
- Specific examples include phthalocyanine, halogenated phthalocyanine, quinacridone, diketopyrrolopyrrole, isoindolinone, azomethine metal complex, indanthrone, perylene, perinone, anthraquinone, dioxazine, benzimidazolone, condensed azo, triphenylmethane, quinophthalone.
- Anthrapyrimidine titanium oxide, iron oxide, zinc white, cobalt blue, ultramarine, graphite, carbon black, pearl mai power, and the like.
- the paint of the present invention may contain a dispersing agent, a curing agent, an ultraviolet absorber, a static electricity removing agent, a thickening agent, if necessary, to the extent that various colors of the coating film and excellent brightness are not impaired.
- a dispersing agent such as coupling agents, plasticizers, antioxidants, brighteners, synthetic preservatives, lubricants, fillers and the like can be added.
- the powder coating containing the flake pigment coated with the surface treating agent of the present invention contains a thermosetting resin powder.
- the thermosetting resin powder is not particularly limited, and is a powder of a resin composition containing a resin that is melted by heating and then quickly cured, and does not affect the surface treatment agent of the present invention.
- Thermosetting resin powder can be used.
- thermosetting resin powder used in the present invention a known thermosetting resin powder for powder coating can be particularly preferably used. Specific examples include powder of a resin composition containing an acrylic resin, a polyester resin, and the like. Further, the thermosetting resin powder used in the powder coating of the present invention may be added with a curing agent, a dispersant, and the like, if necessary.
- the curing agent that can be added to the thermosetting resin powder used in the present invention is not particularly limited, and a known curing agent can be used. Specific examples include amines, polyamides and diamines. Cyandiamides, imidazoles, carboxylic dihydrazides, acid anhydrides, polysulfides, boron trifluoride, amino resins, triglycidyl isocyanates, primides, epoxy resins, other dibasic acids, imidazolines, hydrazides, isocyanates And the like. Further, these curing agents may be used alone or in combination of two or more. Further, these curing agents can be used in combination with a curing accelerator, if necessary.
- the dispersant that can be added to the thermosetting resin powder used in the present invention is not particularly limited, and a known dispersant can be used. Specific examples include surfactants such as phosphates, amines, polyoxyethylene alkyl ethers, and polyoxyethylene alkyl phenyl ethers. These dispersants may be used alone or in combination of two or more.
- thermosetting resin powder used in the powder coating material of the present invention may further include, if necessary, various fillers such as calcium carbonate, barium sulfate, and talc, silica, alumina, and water.
- various fluidity modifiers such as aluminum oxide, various colorants such as titanium oxide, carbon black, iron oxide, copper phthalocyanine, azo pigments, condensed polycyclic pigments, various flow agents such as acrylic oligomers and silicones, and benzoin
- additives such as foams, coupling agents, antioxidants, magnetic powders, etc., and various functional materials are added. ,.
- the average particle size of the thermosetting resin powder used in the powder coating material of the present invention is not particularly limited, but is preferably 5 ⁇ or more, particularly preferably 15 ⁇ . It is more preferable to be above.
- the average particle size is preferably 100 / im or less, more preferably 60 / im or less.
- the average particle size is less than 5 ⁇ , uniform dusting becomes difficult during powder coating, and there is a force S when the resin mass adheres to the coated plate and loses smoothness. If the average particle size exceeds 100 x m, the smoothness of the surface of the powder coating film may be impaired, and a good appearance may not be obtained.
- the content of the metallic pigment of the present invention is 1 part by mass or more based on 100 parts by mass of the thermosetting resin powder used in the present invention. It is particularly preferable that the amount be 2 parts by mass or more.
- the content is preferably 40 parts by mass or less, and more preferably 20 parts by mass or less. This content is 1 quality
- the amount is less than the amount, there is a possibility that a sufficient metallic feeling and brightness may not be obtained, and the thickness of the coating film tends to be increased in order to hide the base material.
- the content exceeds 40 parts by mass the cost is increased and the smoothness of the coating film is lost, so that the appearance tends to deteriorate.
- powder coating is performed by simply dry blending with a thermosetting resin powder for powder coating. Bonding operation can be performed, and powder coating can be performed as bonded aluminum.
- a method proposed by the present inventors for example, see WO 02/094950 A1 pamphlet
- bonded aluminum is not limited thereto.
- a binder having tackiness dissolved in a solvent is added to the resin powder and the flake pigment previously uniformly mixed and kneaded. Kneading is continued until the solvent evaporates and the whole is powdered. After the solvent is completely removed, the powder is classified by an air-flow classifier (screen) to obtain a powder coating for metallic coating.
- an air-flow classifier screen
- the uniform mixing step and the kneading and drying steps of the binder can be performed separately.
- a high-speed mixer such as a normal pressure kneader mixer, a twin screw kneader, a Henschel mixer, a super mixer, or a blender can be used as the mixer, and a kneading / drying machine such as a vibration drier or a continuous fluid drying machine. Machine can be used.
- a flake pigment dispersed in a tacky binder previously dissolved in a solvent may be added to the resin powder, and the solvent may be evaporated while stirring and mixing.
- the solvent in which the binder having the adhesive property is dissolved is not particularly limited, but it is necessary that the resin powder is not dissolved or swelled, and a low boiling point is desirable.
- a thermosetting resin powder for powder coating dissolves at a temperature of 50 ° C to 80 ° C. Therefore, a low boiling solvent that can be distilled off at a temperature lower than the melting temperature of the thermosetting resin powder is preferable.
- under vacuum It is hoped that it can be completely removed at 40-50 ° C.
- Solvents that meet this demand include alkanes such as hexane, heptane and octane, alcohols such as methanol, ethanol and propanol, organic powers such as organic halides such as carbon tetrachloride, and water. .
- the flake pigment to be mixed with the resin powder may be blended so as to be usually about 140 parts by mass, particularly 220 parts by mass per 100 parts by mass of the resin powder. If the amount of the flake pigment is less than 1 part by mass, a sufficient metallic feeling and glitter may not be obtained. In addition, it is necessary to increase the coating thickness in order to conceal the base material. When the amount exceeds 40 parts by mass, the production cost is increased, and the smoothness of the coating film is lost, and the appearance is deteriorated.
- the amount of the tacky binder to be added is 115% by mass based on the obtained powder coating material. If it is less than 1% by mass, the binding is insufficient and a large amount of free flake pigment remains.
- the amount of the solvent in which the binder is dissolved is not particularly limited, but the mixed wet powder (resin powder)
- the surface of the coating is blasted in advance, then subjected to a known treatment such as a chemical conversion treatment, the powder coating is adhered, and then heat-cured. preferable.
- the material to be coated is not particularly limited, but is preferably a material that does not undergo deformation or deterioration due to baking.
- known metals such as iron, copper, aluminum, and titanium, and various alloys are preferable.
- a method of adhering the powder coating of the present invention which is used for vehicles, office supplies, household goods, sports goods, building materials, electric appliances, and the like, to the surface of a substrate is a flow immersion method.
- the electrostatic powder coating method can be applied, but the electrostatic powder coating method is more preferable because of its excellent coating efficiency.
- the heating temperature can be appropriately set according to the type of the thermosetting resin powder to be used, and is usually 120 ° C or higher, preferably 150 to 230 ° C.
- the heating time is a force that can be appropriately selected according to the heating temperature.
- the heating time is generally 1 minute or more, preferably 5 to 30 minutes.
- the coating film formed by heating is usually, but not limited to, about 20 lOO xm.
- the sense of brightness of the coating film is evaluated using the evaluation parameter / 3 / h.
- L is the lightness index (L * a * b * colorimetric system (CIE 1976) measured at an observation angle ⁇ using a spectrophotometer (trade name “X—Rite MA68” manufactured by X—Rite). Is a color system based on the uniform color space defined in (2)), ⁇ is the observation angle, and ⁇ and ⁇ are constants.
- the first item of equation (1) corresponds to the directional scattering peculiar to metallic depending on the observation angle ⁇
- the second item corresponds to the isotropic scattering independent of the observation angle ⁇ .
- the number average molecular weight was 5600 in terms of polystyrene.
- the amount of phosphorus was quantitatively analyzed by ICP, and the amount of fluorine was quantitatively analyzed by ion chromatography, and the composition of the polymerizable monomer unit having a perfluoroalkyl group and the polymerizable monomer unit having a phosphate group in the polymer was determined.
- composition of the polymer A was 11 mol% of a polymerizable monomer unit having a perfluoroalkyl group and 9 mol% of a polymerizable monomer unit having a phosphoric acid group.
- the molecular weight and the polymer composition were determined by the same analysis method as in Example 1.
- the molecular weight of the polymer B was a polystyrene-equivalent number average molecular weight of 2200, and was 16 mol% of a polymerizable monomer unit having a perfluoroalkyl group and 13 molQ / o of a polymerizable monomer unit having a phosphate group.
- the molecular weight and the polymer composition were determined by the same analysis method as in Example 1.
- the molecular weight of Polymer C was a polystyrene equivalent number average molecular weight of 12000, 3 mol% of a polymerizable monomer unit having a perfluoroalkyl group, and 4 mol% of a polymerizable monomer unit having a phosphoric acid group.
- the molecular weight and the polymer composition were determined by the same analysis method as in Example 1.
- the molecular weight of the polymer D is a polystyrene equivalent number average molecular weight of 25,000, 16 mol% of a polymerizable monomer unit having a perfluoroalkyl group, and 9 mol of a polymerizable monomer unit having a phosphoric acid group. / o.
- the molecular weight and the polymer composition were determined by the same analysis method as in Example 1.
- the molecular weight of the polymer E was a polystyrene equivalent number average molecular weight of 200,000, 9 mol% of a polymerizable monomer unit having a perfluoroalkyl group, and 4 mol% of a polymerizable monomer unit having a phosphoric acid group.
- the molecular weight and the polymer composition were determined by the same analysis method as in Example 1.
- Polymer F The molecular weight was 3300 in terms of polystyrene, and the number of polymerizable monomer units having a perfluoroalkyl group was 10 mol%.
- the obtained polymer solution was reprecipitated with hexane 400m.
- the recovered gum-like polymer was redissolved in 10 g of acetone and reprecipitated with 1 liter of ethanol. Since the precipitated polymer adhered to the stirring blade and the inner wall of the vessel, the supernatant was removed by decantation and the adhered polymer was recovered. It was dried under vacuum at room temperature for 1 ⁇ to obtain 1.6 g of the copolymer (yield: 30%).
- this copolymer is referred to as polymer G for convenience of explanation.
- the molecular weight and the polymer composition were determined by the same analysis method as in Example 1.
- the molecular weight of the polymer G was 6800 in terms of polystyrene, and was 8 mol% of a polymerized monomer unit having a phosphate group.
- 0.05 g of the polymer was dissolved in 39 g of acetone, added to 25 g of resin-coated aluminum particles (PCF7670A, manufactured by Toyo Aluminum Co., Ltd.), and kneaded at room temperature with lOmin. The lid was covered so that the acetone did not evaporate, and the mixture was allowed to stand at room temperature for 3 hours. Hexane (500 ml) was vigorously stirred, and the paste was gradually added and dispersed therein. After the slurry was filtered and air-dried, the slurry was passed through a screen having openings of 100 m to obtain a polymer-coated resin-coated aluminum pigment.
- PCF7670A resin-coated aluminum particles
- the polymer-coated resin-coated aluminum pigment was blended with a polyester-based thermosetting resin powder (trade name: Teodur PE 785-900, manufactured by Takashi Kubo Paint) to prepare a powdered metallic paint.
- the blend ratio was 8 g of resin-coated aluminum pigment coated with polymer for 100 g of thermosetting resin.
- this blend ratio is based on the It is intended to satisfy the condition of being completely concealed by the rubber pigment and having a smooth surface.
- Powder coating was performed using a corona discharge type electrostatic powder coating machine (MXR-100VT-mini, manufactured by Matsuo Sangyo Co., Ltd.), and a coated plate was created by baking (applied voltage: 80 kV) at 190 ° C for 20 minutes. did.
- MXR-100VT-mini corona discharge type electrostatic powder coating machine
- the color tone of the coating film was evaluated by the parameter ⁇ calculated from the L value measured by X-Rite MA68 (manufactured by X-Rite).
- ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ is a parameter corresponding to the brightness of the painted plate.
- the value of / 3 / hi of the coated plate was 189.
- Teodur PE 785—900 was further powder-coated on the coated plate prepared above,
- test coated plate was evaluated according to the cross-cut tape method described in JIS K54008.5.2 (1996) (number of squares of 2 mm and number of squares of 25). JIS evaluation points 108 points were rated as ⁇ , 6-14 points as ⁇ , and 2-0 points as X ⁇ . The secondary adhesion evaluation result in this example was ⁇ .
- Example 6 The same operation as in Example 6 was performed except that the amount of the polymer ⁇ was changed.
- the coated board In the evaluation of the color tone of the powder-coated board, the coated board must be completely concealed by the aluminum pigment and the surface must be smooth. Therefore, the blend ratio between the thermosetting resin and the processed product is
- Powder coating was performed in the same manner as in 6, and the color tone and secondary adhesion were evaluated.
- Example 8 The same operation as in Example 8 was performed using polymers B and C.
- the coated board In the evaluation of the color tone of the powder coated board, the coated board must be completely concealed by the aluminum pigment and the surface must be smooth. Therefore, the blending ratio between the thermosetting resin and the treated product was adjusted to satisfy the conditions.
- Example 8 The same operation as in Example 8 was performed using polymers F and G. In the evaluation of the color tone of the powder coated board, the coated board must be completely concealed by the aluminum pigment and the surface must be smooth. Therefore, the blending ratio between the thermosetting resin and the treated product was adjusted to satisfy the conditions.
- Example 8 The same operation as in Example 8 was performed using polymers D and E.
- the coated board In the evaluation of the color tone of the powder coated board, the coated board must be completely concealed by the aluminum pigment and the surface must be smooth. Therefore, the blending ratio between the thermosetting resin and the treated product was adjusted to satisfy the conditions.
- the aluminum paste (Toyo Aluminum Co., Ltd. 7670NS) was thoroughly washed with mineral spirit, and a solution prepared by dissolving 5 g of polymer AO. In 48 g of acetone was added to the filtered paste (64% of non-volatile components). Kneaded. The lid was covered so that the acetone did not evaporate, and the mixture was allowed to stand at room temperature for 3 hours. Hexane (1 liter) was vigorously stirred, and the paste was gradually added and dispersed therein. After the slurry was filtered and air-dried, it was passed through a 100- ⁇ m opening screen to obtain an aluminum pigment coated with the surface treatment agent of the present invention.
- PCF 7670 used in Example 614 and 7670NS used in Example 15 was that the former was resin-coated aluminum particles, while the latter was untreated aluminum particles. It is.
- the resin-coated aluminum pigment 6.Og and Teodur PE 785-900 obtained in Example 8 and treated with the surface treating agent of the present invention were blended.
- As a binder 1.5 g of YS Polystar TH-130 manufactured by Yashara Chemical Co., Ltd. was dissolved in 24.7 g of heptane. Was added. The mixture was air-dried while kneading, and when it became a fluid powder, it was placed in a 1-liter eggplant flask and dried in a vacuum using an evaporator to completely remove heptane, thereby obtaining bonded aluminum.
- Example 16 The same operation as in Example 16 was performed except that the aluminum pigment treated with the surface treating agent of the present invention obtained in Example 15 was used.
- Aluminum paste 7670NS was sufficiently washed with Merpeille, and 169.lg of the filtered paste (53% of non-volatile components) was dispersed in 524.Og of Menolevé. Thereto, 16.2 g of FA-108 and 1.8 g of trimethylolpropane triatalylate (trade name: TMP-3A, manufactured by Osaka Organic Chemical Co., Ltd.) were added. After sufficient nitrogen replacement with stirring, the mixture was heated to 80 ° C. 0.6 g of AIB N was added, and the mixture was reacted at 80 ° C. for 18 hours while stirring was continued. The resulting dispersion was filtered and washed with Merpeille, then solvent-exchanged with hexane and air-dried to form a powder, which was then applied to a screen with openings of 100 ⁇ m.
- TMP-3A trimethylolpropane triatalylate
- a part of the obtained powdery metallic pigment was dissolved in an acid, and the amount of the resin coated on the surface was measured. As a result, it was found that 100 g of the raw aluminum was coated with 14 g of the resin. .
- This resin-coated powdery metallic pigment is called a fluororesin-coated product.
- the same powder coating as in Example 6 was performed using this fluorine resin-coated product, and evaluation was performed.
- the blend ratio was 6 g of powdered aluminum pigment for 100 g of thermosetting resin. The blend ratio is such that the coated plate is completely concealed by the aluminum pigment and the surface is smooth.
- Table 2 summarizes the preparation conditions of the flake pigments and paints of Example 617 and Comparative Examples 3-6 and the evaluation results of the coating films.
- the amount of the treatment agent added in Table 2 is a percentage of the amount of polymer A added to the resin-coated aluminum pigment.
- Example 6 10 and Comparative Example 3 From the results of Example 6 10 and Comparative Example 3, the effect of the copolymer shown in the present invention is clear, and the aluminum particles are very excellent because they are coated with this copolymer. It can be seen that it becomes possible to form a powder coating film having a sense of brightness. It also overcomes the poor secondary adhesion that occurs when using an alkyl fluoride group.
- the fluorine-containing polymerizable monomer having an alkyl fluoride group for completing the present invention does not depend on the chain length of the alkyl fluoride group.
- one or more polymerizable monomers other than the fluorine-based polymerizable monomer having a fluorinated alkyl group and the polymerizable monomer having a phosphoric acid group are not limited to a specific monomer.
- the copolymer of the present invention does not depend on the surface state of the object to be treated. In the category of powder coatings, the effect is exhibited regardless of the difference in form such as dry blend or bond. In addition, a fluororesin-coated product can provide a high brightness feeling, but is inferior in secondary adhesion.
- the flake pigment of the present invention can be suitably used in a powder coating, and gives a coating film an excellent metallic feeling and a high luminance feeling, and further gives good secondary adhesion. It is a flake pigment.
- the paint of the present invention is a paint that gives an excellent metallic feeling and high luminance feeling to a coating film, and further provides excellent secondary adhesion.
- the powder coating of the present invention is a powder coating which gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides good secondary adhesion.
- the surface treatment agent of the present invention can be suitably used in a powder coating, and gives a coating film an excellent metallic feeling and a high luminance feeling, and further provides a good secondary adhesion.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005511820A JP4553844B2 (ja) | 2003-07-18 | 2004-07-13 | フレーク顔料、それを含む塗料および粉体塗料、それに用いるフレーク粒子の表面処理剤 |
EP04747418A EP1655349B1 (en) | 2003-07-18 | 2004-07-13 | Flake pigment, coating material and powder coating composition each containing the same, and surface-treating agent for flaky particle for use therein |
US10/540,004 US20060063004A1 (en) | 2003-07-18 | 2004-07-13 | Flake pigment, coating material and powder coating composition each containing the same and surface-treating agent for flaky particle for use therein |
CN2004800098292A CN1774482B (zh) | 2003-07-18 | 2004-07-13 | 片状颜料、含有该颜料的涂料以及粉体涂料、其中使用的片状颗粒的表面处理剂 |
DE602004023854T DE602004023854D1 (de) | 2003-07-18 | 2004-07-13 | Schuppenförmiges pigment, es enthaltenderlack bzw. pulverlack sowie zur verwendung darin vorgesehenesoberflächenbehandlungsmittel für schuppenförmiges pigment |
Applications Claiming Priority (2)
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JP2003-199099 | 2003-07-18 | ||
JP2003199099 | 2003-07-18 |
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WO2005007755A1 true WO2005007755A1 (ja) | 2005-01-27 |
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PCT/JP2004/009952 WO2005007755A1 (ja) | 2003-07-18 | 2004-07-13 | フレーク顔料、それを含む塗料および粉体塗料、それに用いるフレーク粒子の表面処理剤 |
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US (1) | US20060063004A1 (ja) |
EP (1) | EP1655349B1 (ja) |
JP (1) | JP4553844B2 (ja) |
KR (1) | KR100696925B1 (ja) |
CN (1) | CN1774482B (ja) |
DE (1) | DE602004023854D1 (ja) |
WO (1) | WO2005007755A1 (ja) |
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JP2009215411A (ja) * | 2008-03-10 | 2009-09-24 | Toyo Aluminium Kk | フレーク顔料、それを含む粉体塗料、それを用いて摩擦帯電式静電塗装機で塗装して得られた粉体塗装塗膜、それが形成された塗装物、およびフレーク顔料の製造方法 |
KR101566045B1 (ko) * | 2008-03-10 | 2015-11-04 | 도요 알루미늄 가부시키가이샤 | 플레이크 안료, 그것을 함유하는 분체 도료, 그것을 사용하여 마찰 대전식 정전 도장기로 도장하여 얻어진 분체 도장 도막, 그것이 형성된 도장물, 및 플레이크 안료의 제조 방법 |
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JP2016180114A (ja) * | 2016-06-14 | 2016-10-13 | セイコーエプソン株式会社 | 塗料 |
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Also Published As
Publication number | Publication date |
---|---|
KR20050123141A (ko) | 2005-12-29 |
EP1655349B1 (en) | 2009-10-28 |
DE602004023854D1 (de) | 2009-12-10 |
KR100696925B1 (ko) | 2007-03-20 |
CN1774482B (zh) | 2010-04-28 |
EP1655349A1 (en) | 2006-05-10 |
CN1774482A (zh) | 2006-05-17 |
US20060063004A1 (en) | 2006-03-23 |
EP1655349A4 (en) | 2008-04-23 |
JP4553844B2 (ja) | 2010-09-29 |
JPWO2005007755A1 (ja) | 2007-04-12 |
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