WO2005019350A1 - 帯電調整剤を含有する皮膜を備えたフレーク顔料、それを含んだ粉体メタリック塗料、それを用いた塗膜およびそのフレーク顔料の製造方法 - Google Patents
帯電調整剤を含有する皮膜を備えたフレーク顔料、それを含んだ粉体メタリック塗料、それを用いた塗膜およびそのフレーク顔料の製造方法 Download PDFInfo
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- WO2005019350A1 WO2005019350A1 PCT/JP2004/011684 JP2004011684W WO2005019350A1 WO 2005019350 A1 WO2005019350 A1 WO 2005019350A1 JP 2004011684 W JP2004011684 W JP 2004011684W WO 2005019350 A1 WO2005019350 A1 WO 2005019350A1
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- flake pigment
- coating
- flake
- powder
- control agent
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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
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon 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
- 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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- 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
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/90—Other properties not specified above
Definitions
- Flake pigment provided with film containing charge control agent, powdered metallic paint containing the same, coating film using the same, and method for producing the flake pigment
- the present invention relates to a flake pigment used for a powder coating. More specifically, the present invention relates to a novel flake pigment whose charge value is adjusted for the purpose of developing and maintaining excellent brightness and metallic feeling.
- the present invention also relates to a powdery metallic paint containing the above flake pigment. Furthermore, the present invention relates to a coating film obtained from a powdery metallic paint containing the above flake pigment. Further, the present invention relates to a method for producing the above flake pigment.
- Powder coating is a low-emission type, and it does not require multiple coatings as with conventional solvent-based coatings, where the coating formed by a single coating is thicker. Can be shortened. Furthermore, since the paint does not contain a solvent, it also has an advantage that pinholes are not generated in the coating film. In the case of a powder coating having the above-mentioned characteristics, when no flake pigment such as aluminum is contained, the coating film characteristics are good and there is no particular problem.
- the appearance of the coating film obtained by applying the powdered metallic paint produced by this method cannot be said to be sufficiently satisfactory. Furthermore, in this production method, when aluminum particles are used as the flake 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 bonded method includes a method in which a flake pigment is adhered to the surface of a resin powder using a brush polisher, and a method in which the resin powder is brought into contact with a dispersion medium such as alumina balls coated with the flake pigment to form a resin powder. Then, there is a method of transferring and bonding flake pigment.
- This method has an advantage that the introduction rate of the flake pigment into the coating film is stable, and the recovered metallic powder paint that does not adhere to the substrate can be reused.
- the flake pigment and the resin powder are pressure-bonded by physical stress, so that the flake pigment is easily deformed and an excellent metallic feeling is hardly obtained immediately. Furthermore, since the bonding strength is weak, there is an advantage that bonding (blocking) between the resin powders does not easily occur. On the other hand, it is difficult to bond all of the flake pigments to the resin powder. Many free flake pigment particles that do not bind to the body also remain.
- the mixing ratio of the resin powder and the flake pigment changes when the paint is recovered and used, due to the difference in adhesion efficiency, and the reuse of the paint after recovery is difficult. Will not be able to. Further, when a metal pigment such as aluminum particles is used as the flake pigment, a large amount of free flake pigment is present, so that the risk of ignition, dust explosion, and the like increases.
- the weakening of the bonding force between the resin powder and the flake pigment is particularly remarkable when the particle size of the flake pigment is large, and the superiority achieved only by using the flake pigment having such a large particle size. There is a problem that it is difficult to obtain high brightness and high luminance with bonded aluminum.
- the dry blend method has an advantage that deformation of the flake pigment is relatively unlikely to occur.
- This phenomenon is caused by flake pigments such as aluminum flakes adhering and depositing around the electrodes of the electrostatic coating machine when the electrostatic coating is continued for a long time, and finally adhering to the coating surface as a lump, resulting in a coating film bump. .
- any of the above-mentioned melt blending method, bonded method, and dry blending method can be employed, regardless of the presence or absence of the flake pigment.
- the adhesion efficiency to the object to be coated is low, the base is not concealed unless over-applied more than necessary when polyester resin powder is used.
- flake pigments for a powdery metallic paint or a powdery metallic paint containing the same.
- flake pigments, powdery metallic paints containing flake pigments and resin powders, and coating films thereof have not been obtained, which are satisfactory in terms of metallicity and brilliantness even with less dangerous colors.
- 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 JP-A-10-72557
- Patent Document 6 JP-A-11-293161
- An object of the present invention is to provide a flake pigment for dry blending, which can be suitably used in a powder coating and gives a coating film an excellent metallic feeling and a high luminance feeling.
- Another object of the present invention is to provide an excellent recyclability in which the flake pigment content does not change much before and after coating, in which the phenomenon of separation between the flake pigment and the resin powder hardly occurs during coating.
- An object of the present invention is to provide a powdery metallic paint for dry blending, which enables concealment of a base by aluminum flakes without using an unnecessary layer even when a rill-based resin powder is used.
- Another object of the present invention is to provide a coating film which shows an excellent metallic feeling and a high brilliant feeling and suppresses the generation of spit buds.
- Another object of the present invention is to provide a flake paint for dry blending which can be suitably used in powder coatings and which gives a coating film excellent metallic feeling and high brightness, in a simple and low-cost.
- An object of the present invention is to provide a method for producing a flake pigment which can be produced at a low cost.
- the present inventors have proposed that when a powdery metallic paint is applied by a dry blending method, the content of the flake pigment in the paint and the content of the flake pigment in the adhered coating film are determined. As close as possible, that is, the introduction rate represented by the following equation (3) is set to 100
- Introduction rate (%) content of flake pigment in adhered coating film Z content of flake pigment in paint composition X 100 (%) ⁇ ⁇ ⁇ ⁇ (3)
- the value of the introduction rate often shows a value of less than 100%, which usually does not become 100%.
- the present inventors set the above introduction rate to 100. / 0
- the surface treatment was performed in the same manner as described above, and the introduction rate was measured.
- the introduction rate approaches 100%. I found it.
- the present inventor has found that in a powder coating using an acrylic resin powder, the flake pigment does not hide the base unless the conventional method is applied more than necessary.
- acrylic resin powder tends to be positively charged, unlike a resin having a tendency to be negatively charged such as polyester resin powder, a high negative charge is applied to the paint during electrostatic coating, for example, a corona charging method. Even when the applied voltage is applied, the charge amount of the resin powder is small and the adhesion efficiency is reduced.
- the base is not concealed unless the coating is performed more than necessary by ordinary means.
- the inventor of the present invention solves such a problem by modifying the charge value of the flake pigment so that the charge value itself of the resin powder can be increased to have a high negative charge value. It has been found that the present invention is preferable, and the present invention has been completed.
- the flake pigment of the present invention is a flake pigment comprising base particles having a flake-like shape, and a film containing a charge controlling agent covering the surface of the base particles.
- the base particles are preferably made of a material containing a metal.
- the charge control agent contains a negative charge control agent and / or a positive charge control agent.
- the negative charge control agent is preferably at least one selected from the group consisting of an azo Cr complex, a salicylic acid A1 complex, and a resin-based charge control agent having a sulfonic acid group.
- the positive charge control agent includes azine-based compound nigguchicin, azine-based compound nigashicin bases, azine-based compound nigguchicin derivatives, metal salts of naphthenic acid, and quaternary ammonium salts of naphthenic acid.
- alkyl amides of naphthenic acid metal salts of higher fatty acids, quaternary ammonium salts of higher fatty acids, alkyl amides of higher fatty acids, and quaternary ammonium salts of resinous compounds.
- the powder metallic paint of the present invention contains the above flake pigment and resin powder. It is a powder metallic paint.
- Equation 1 C represents the charge value (xCZg) of the flake pigment, and C represents
- the coating film of the present invention is a coating film obtained by powder-coating the above-mentioned powdery metallic paint on a substrate and heat-curing.
- the method for producing a flake pigment of the present invention is a method for producing a flake pigment, comprising: base particles having a flake-like shape; and a film containing a charge controlling agent that covers the surface of the base particles. Dispersing the base particles in a good solvent for the charge control agent in which the charge control agent is dissolved, and adding a poor solvent for the charge control agent to the good solvent in which the base particles are dispersed. And then depositing the coating on the surface of the substrate particles.
- a method for producing a flake pigment of the present invention includes a method for producing a flake pigment, comprising: base particles having a flake shape; and a film containing a charge controlling agent covering the surface of the base particles.
- a flake comprising: mixing a polymerizable monomer with the charge control agent to obtain a mixture; and forming a film containing a copolymer resin obtained from the mixture on the surface of the base particles.
- a method for producing a pigment may be used. The invention's effect
- the flake pigment of the present invention is a flake pigment for dry blending that can be suitably used in powder coatings and gives a coating film excellent metallic feeling and high brightness.
- the powdery metallic paint of the present invention is excellent in recyclability, in which the flake pigment and the resin powder are less likely to separate during coating, and the content of the flake pigment before and after coating is less changed.
- Powder blending paint for dry blending that enables the concealment of base by aluminum flakes without the need for overcoating even when using acrylic resin powder.
- the coating film of the present invention is a coating film that exhibits an excellent metallic feeling and a high brilliant feeling and suppresses the occurrence of spit bubbling.
- the flake pigment production method of the present invention can be used for powder coatings, and can easily and easily provide a flake pigment for dry blending that gives a coating film an excellent metallic feeling and high brightness. This is a method for producing flake pigments that can be produced at low cost.
- the flake pigment of the present invention is a flake pigment comprising: base particles having a flake-like shape; and a film containing a charge controlling agent covering the surface of the base particles.
- the base particles having a flake shape used for the flake pigment of the present invention are not particularly limited.
- the base particles may be made of a material containing a metal such as aluminum, zinc, copper, bronze, nickel, titanium, and stainless steel. Flakes and alloy flakes thereof. Among these particles, 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 as the above-mentioned base particles is usually preferably in the range of 110 ⁇ m, more preferably in the range of 3-60 / im. This average particle size If the force exceeds ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ , aluminum flakes will protrude to the surface of the coating film, and the smoothness or sharpness of the coating surface tends to decrease. If the average particle size is less than 1 ⁇ m, Metallic feeling or glitter tends to decrease.
- the average thickness of the aluminum flakes used as the base particles is usually preferably in the range of 0.01 to 5 ⁇ m, more preferably in the range of 0.02 2 x m. If the average thickness exceeds 5 ⁇ m, the smoothness or sharpness of the coated surface tends to decrease, and this may also lead to an increase in manufacturing costs. When it is full, the strength tends to decrease, and it may be difficult to perform processing during the manufacturing process using force and glue.
- the average particle size of the base 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, and a coulter counter method.
- a known particle size distribution measuring method such as a laser diffraction method, a micromesh sieve method, and a coulter counter method.
- Can be The average thickness is calculated from the hiding power and the density of the flake pigment.
- a grinding aid added during grinding may be adsorbed on the surface of the aluminum flake used as the base particles.
- the grinding aid include fatty acids (oleic acid, stearic acid), aliphatic amines, aliphatic amides, aliphatic alcohols, and esterified compounds. These have the effect of suppressing unnecessary oxidation of the aluminum flake surface and improving light emission.
- the amount of adsorption is preferably less than 2 parts by mass per 100 parts by mass of aluminum flake. 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 surfaces of the base particles.
- the colorant and color pigment are not particularly limited. , Anthrapyrimidine, graphite, pearl mai power, transparent phenolic power, colored mai power, interference mai power, phthalocyanine, halogenated phthalocyanine, azo pigment (azomethine metal complex, condensed azo, etc.) titanium oxide, carbon black, oxidation Iron, copper
- the method of adhering the color pigment to the base particles used in the present invention is not particularly limited.
- the method is such that the color pigment is coated with a dispersant and then mixed with the base particles in a non-polar solvent with stirring.
- a method of attaching to substrate particles is preferred.
- dispersant examples include benzoic acid, benzoic acid bur, salicylic acid, anthranilic acid, m-aminobenzoic acid, p-aminobenzoic acid, 3_amino-4 monomethylbenzoic acid, 3,4-diaminobenzoic acid, p —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, tetramethylene Diamine, pentamethylenediamine, hexamethylenediamine, 1,7-diaminoheptane, 1,8-diaminooctane, 1,10-diaminodecane, 1,12-diaminododecane, o_phenylenediamine, m—
- an interference film or the like can be formed on the surface of the base particles.
- the method is not particularly limited, for example, in order to form a light interference oxide film on each particle surface of the base particles made of metal flakes, the metal flakes are formed in an atmosphere in which the amount of oxygen is controlled.
- a method of forming an air oxide film on the surface by heating the substrate particles to a temperature of about 300-700 ° C, or covering the substrate particles made of flake-shaped metal pigment with a precursor of an oxide such as a transition metal. The preferred method is to decompose by heating in the state of being done.
- a base particle having a resin layer formed on the surface thereof In order to impart chemical resistance, water resistance, or weather resistance to the base particles used in the present invention, it is preferable to use a base particle having a resin layer formed on the surface thereof.
- the method for forming the resin layer on the surface of the base particles is not particularly limited, but a polymerizable monomer is added to a slurry in which the base particles are dispersed in an organic solvent, and the slurry is heated in an inert gas atmosphere. It is preferable to add a polymerization initiator such as bisisobutyronitrile and benzoyl peroxide to polymerize the monomer and precipitate a polymer on the surface of the metal flake.
- a polymerization initiator such as bisisobutyronitrile and benzoyl peroxide
- Examples of the polymerizable monomer include acrylic acid, methacrylic acid, and methacrylic acid mesylate. Butyl, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl atelinoleate, cyclohexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxybutyl acrylate, 2-methoxyethyl acrylate, acrylic 2-Ethylaminoethyl acid, butyl methacrylate, otatyl methacrylate, 1,4-butanediol diatalylate, 1,6-hexanediol diatalylate, 1,9-nonanediol diatalylate, neopentyl glycol Diatalylate, tripropylene glycol diatalylate, tetraethylene dalichol diatalylate, trimethylolpropane triatalylate
- the base particles used in the present invention include my strength, surface coloring strength, glass flake, surface colored glass flake, pearl, alumina flake, colored alumina flake, silica flake, colored silica flake, and iron oxide flake.
- flake-like base particles made of graphite eye flakes, hologram pigment flakes, and cholesteric liquid crystal polymers singly or in combination of two or more. Good.
- phase separation method phase separation method
- a solution prepared by dissolving a commercially available charge adjusting agent soluble in a solvent in a good solvent having a strong dissolving power is prepared.
- the substrate particles to be coated are dispersed in the solution and stirred to maintain a suspension state.
- a poor solvent that does not dissolve the charge controlling agent is gradually dispersed in the suspended slurry, whereby a coating film of the charge controlling agent is deposited on the surface of the base particles. It is.
- the selection of the solvent in which the charge control agent is first dissolved is determined by the combination of the charge control agent and the composition of the charge control agent to be dissolved. High-solvents can be used.
- Examples of such good solvents include ester solvents such as butyl acetate, ethyl acetate, and methyl acetate, such as methyl ethyl ketone and ketone solvents such as acetone, xylene, benzene, toluene, and chlorobenzene.
- Aromatic solvents include cyclocompound solvents such as cyclohexane and cyclohexanone.
- Examples of the poor solvent added to precipitate the charge controlling agent on the surface of the base particles include anolecans such as pentane, hexane, heptane, octane, nonane, and decane; isopentane; Isoparaffins such as isohexane, isoheptane, isooctane and the like can be mentioned.
- the good solvent is further distilled off by means such as vacuum distillation to complete the deposition of the film on the surfaces of the base particles.
- the good solvent used first is a solvent having a low boiling point that is easily distilled off, and the poor solvent is a solvent having a high boiling point that does not evaporate under the conditions of vacuum distillation of the good solvent. Les ,.
- a solvent having a very low boiling point has a problem of safety, and it is practical that the temperature is 50 ° C. or higher, which is difficult to use in practice.
- Alkanes or isoparaffinic aliphatic solvents having a boiling point in the range of 140 to 210 ° C are easily used as poor solvents.
- Examples of the charge control agent used for coating the surface of the base particles include a azo Cr complex, a salicylic acid A1 complex and a resin charge control agent having a sulfonic acid group as a negative charge control agent. It is desirable that the charge control agent itself be a material with excellent transparency in the sense that it does not reduce the metallic feeling of the product.In this regard, use of a salicylic acid A1 complex or a resin charge control agent having a sulfonate group is desirable. Is desirable.
- nig-type compounds such as azine-based compounds, nig-type bases of azine-type compounds, and azine-based compounds Nigguchi syn derivatives, metal salts of naphthenic acid, quaternary ammonium salts of naphthenic acid, alkyl amides of naphthenic acid, metal salts of higher fatty acids, quaternary ammonium of higher fatty acids Examples include dimethyl salts, alkyl amides of higher fatty acids, and quaternary ammonium salts of resin compounds. Among these, it is desirable to use a quaternary ammonium salt of the above compound because of its excellent transparency.
- the above-mentioned charge control agents can be used either positively or negatively alone. However, in order to adjust the introduction ratio to 100% and obtain a finished painted surface having a beautiful metallic feeling, it is preferable to use the charge control agents in combination. It is more preferable to mix and use them, since the adjustment is easy.
- the coating amount (content) of the charge control agent on the base particles in the flake pigment depends on the type of the charge control agent, but is generally 0.15.0 when the base particles are 100 parts by mass. It is more preferably in the range of 0.2 to 3.0 parts by mass. If the content is less than 0.1 part by mass, the charge adjusting function tends to be insufficient. If the amount exceeds 5.0 parts by mass, aggregation of the base particles may be caused or the physical properties of the coating film may be impaired. There is.
- a resin layer for imparting chemical resistance, water resistance or weather resistance to the surface of the substrate particles is formed.
- the polymerizable monomer for forming the resin layer is mixed with a compound that can be used as the above-described negative charge control agent for adjusting the charge value, and the copolymer resin with the polymerizable monomer is added.
- the base particles are coated with an acrylic resin layer
- a copolymer resin with a conventionally known polymerizable monomer using 2-acrylamido-2-methylpropanesulfonic acid or the like that gives a negative charge characteristic is used. It is desirable to three-dimensionally cross-link the film containing the metal flakes on the surface of the base particles composed of metal flakes.
- the organic solvent used for dissolving the above-mentioned polymerizable monomer dipropylene glycolone monomethinoleate or propylene glycolone monomethyoleate is suitable.
- the copolymerization ratio at this time it is appropriate to blend a compound that gives negative charging properties such as 2_acrylamide-2-methylpropanesulfonic acid so as to be about 5% by weight. In some cases, it is adjusted according to the charge value of the resin powder of the other party to be used, and this is not always the case.
- the polymerizable monomer when imparting a positive charge to the film covering the base particles, the polymerizable monomer is added with, for example, a dialkylaminoalkyl (meth) acrylate to obtain a polymerizable monomer.
- a film containing the copolymer resin formed in advance is formed on base particles made of metal flakes, and the resulting copolymer resin is quaternized with alkyl para-toluenesulfonate such as methyl paratonolenesulfonate. Les, prefer to be.
- the amount of methyl paratoluenesulfonate or the like used in the above quaternization is determined by using 1 mol per 1 mol of a unit such as dialkylaminoalkyl (meth) atalylate contained in the copolymer resin. Is appropriate.
- a unit such as dialkylaminoalkyl (meth) atalylate contained in the copolymer resin.
- the organic solvent used for dissolving the polymerizable monomer dipropylene glycol monomethyl ether or propylene glycol monomethyl ether is suitable.
- organic peroxides such as t-butyl peroxide, acetyl peroxide, benzoyl peroxide, and lauryloyl peroxide, and azo compounds such as azobisisobutyronitrile are used. May be used.
- the powder metallic paint of the present invention contains the flake pigment of the present invention and a resin powder.
- the powdery metallic paint of the present invention in order to maintain the introduction rate of the flake pigment of the present invention at 100% and obtain a coating film having an excellent metallic feeling, a substance having a charge control function (charge control agent) It is necessary to use a flake pigment contained in a film coated on the surface of the substrate particles. Further, it is preferable that the charge value of the flake pigment and the charge value of the resin powder satisfy the following expressions 1 and 2.
- C is the charge value of the flake pigment (unit: z C / g
- the charge value of the resin powder used for the powder coating is determined by the polystyrene used in many cases. In the case of telluric resin and acrylic resin, the range is about -50 ⁇ C / g-10 ⁇ C / g. Among them, the charge value of the most frequently used polyester resin powder is about 22 / C / g. On the other hand, the charge value of aluminum flakes with a resin layer formed on the surface, which is generally used for powdered metallic coatings, is about 41-8 ⁇ C / g, In order for the charge value of the resin powder to satisfy Equation 1, it is necessary to adjust the charge value of the surface of the flake pigment using aluminum flake as a base particle by a negative charge adjuster.
- the charge value of the flake pigment is adjusted so as to satisfy Equation 1.
- the efficiency of coating the coating itself on the object to be coated decreases and the loss increases. It is preferable to satisfy the following.
- the flake pigment may not
- Adhesion efficiency tends to decrease. Conversely, if it exceeds 40 / C / g, flake pigments tend to agglomerate during the charge control agent coating treatment.
- the resin powder when a general acrylic resin powder is used, the resin powder itself exhibits a charge value of flakes of about 10 / C / g, and in this state, the coating efficiency of the resin powder decreases. However, in a normal ejection pattern, the coating film thickness is reduced, and the concealing property of the base is reduced. In such a case, in addition to adjusting the charge value of the flake pigment that satisfies Formulas 1 and 2, it is preferable to modify the charge value of the resin powder itself to have a high negative charge value. ,.
- a device for measuring the charge value of the resin powder and flake pigment used in the present invention various devices such as a blow-off system and a suction system are commercially available. The measurement was performed using a popular blow-off charge meter TB-200 manufactured by Toshiba Chemical Corporation. These devices are called ferrites called carriers After the powder and the powder sample to be measured are mixed and triboelectrically charged, the charge amount of the carrier in the Faraday cage separated by a method such as blow-off or suction is electrically measured. Therefore, although the absolute value of the charge amount differs depending on the model or carrier type used for measurement, the tendency of the charge value of each sample does not reverse depending on the measurement conditions.
- the resin powder to be dry-blended with a flake pigment composed of base particles coated with a film containing a charge controlling agent produced by various methods includes the acrylic resin-based powder and the polyester resin-based powder.
- alkyd resin powder, urea resin powder, melamine resin powder, phenol resin powder, ebonite powder, and the like can be used.
- polyester resin-based powders there are those that are cured with an epoxy resin, those that are cured with an isocyanate (urethane-based), and those that are cured with a primid (a primid-based).
- quinacridone diketopyrrolopyrrole, isoindolinone, indanthrone, perylene, perinone, anthraquinone, dioxazine, benzimidazolone, triphenyl methane quinophthalone, anthrapyrimidine, graphite, pearl my power, Transparent pearl strength, coloring strength, interference strength, phthalocyanine, halogenated phthalocyanine, azo pigments (azomethine metal complex, condensed azo, etc.) titanium oxide, carbon black, iron oxide, copper phthalocyanine, condensed polycyclic pigments, etc. These various colorants may be contained in the thermosetting resin powder used in the present invention.
- various fillers such as bentonite, alumina white, calcium carbonate, barium sulfate, talc, etc., various fluidity modifiers such as silica, alumina, aluminum hydroxide, and acrylic as required.
- various spreading agents such as oligomers and silicones, various foaming inhibitors such as benzoin, and also waxes, coupling agents, antioxidants, magnetic powders, stabilizers, ultraviolet absorbers, leveling agents, thickeners
- Various additives including various agents and anti-settling agents and various functional materials may be contained in the resin powder used in the present invention.
- the average particle size of the resin powder used in the present invention is not particularly limited, but is usually preferably in the range of 5 to 100 ⁇ , and particularly preferably in the range of 15 to 60 / im. More preferred.
- the average particle size is less than 5 ⁇ m, it is difficult to uniformly mix the flake pigment with the flake pigment of the present invention, and the cohesiveness is increased. If the average particle size exceeds 100 zm, the smoothness of the coating film surface may be impaired, and a good appearance may not be obtained.
- the content of the flake pigment of the present invention is preferably 1 part by mass or more based on 100 parts by mass of the resin powder used in the present invention. More preferably, it is at least 2 parts by mass. In addition, the content is preferably 40 parts by mass or less, and more preferably 20 parts by mass or less. When the content is less than 1 part by mass, a sufficient metallic feeling and luminance may not be obtained, and there is a tendency that the thickness of the coating film must be increased in order to hide the base material. When the content exceeds 40 parts by mass, the cost is increased, the smoothness of the coating film is lost, and the appearance tends to deteriorate.
- a coloring pigment or the like may be added as necessary.
- organic pigments such as quinacridone red, phthalocyanine blue, phthalocyanine green, isoindolinone yellow, carbon black, perylene, and azo lake, iron oxide, titanium oxide, cobalt blue, zinc white, ultramarine, chromium oxide, myriki, and graphite Inorganic pigments.
- quinacridone red phthalocyanine blue
- phthalocyanine green isoindolinone yellow
- carbon black perylene
- azo lake iron oxide
- titanium oxide cobalt blue
- zinc white ultramarine
- chromium oxide chromium oxide
- myriki and graphite Inorganic pigments.
- graphite Inorganic pigments One or more of these coloring pigments can be used.
- the powdery metallic coating material of the present invention may contain, if necessary, an ultraviolet absorber, an antistatic agent, a dispersant, an antioxidant, an glazing agent, a surfactant, a synthetic preservative, and a lubricant.
- an ultraviolet absorber an antistatic agent
- a dispersant an antioxidant
- an glazing agent a surfactant
- a synthetic preservative a synthetic preservative
- a curing agent, a filler (reinforcing material) and the like can also be added.
- the coating film of the present invention is a coating film obtained by powder-coating the above-mentioned powdery metallic paint on a substrate and heat-curing.
- the coated surface is subjected to a known treatment such as a chemical conversion treatment after the blast treatment, and then the powdered metallic paint is adhered. After that, it is preferable to heat and cure.
- the material to be coated (substrate) of the powdery metallic paint of the present invention is not particularly limited, but is preferably one that does not cause deformation, alteration, or the like due to baking.
- a substrate made of a material containing known metals such as iron, copper, aluminum, and titanium and various alloys is preferable.
- Specific forms of the above-mentioned base material include, for example, car bodies, office supplies, household goods, sports goods, building materials, electric products and the like.
- a fluid immersion method, an electrostatic powder coating method, or the like can be applied. More preferred. Known methods such as a corona discharge method and a triboelectric charging method can be used for the method of electrostatic powder coating.
- the heating temperature at the time of baking can be appropriately set depending on the type of the resin powder to be used, but is usually preferably in the range of 120 to 230 ° C, particularly preferably in the range of 150 to 230 ° C. It is more preferred. If the heating temperature is lower than 120 ° C, the crosslinking reaction (curing) does not proceed sufficiently, and the desired properties of the coating tend not to be obtained. If the heating temperature exceeds 230 ° C, There is a tendency that the resin turns yellow or is brittle.
- the heating time when the powdered metallic paint of the present invention is baked and cured by heating can be appropriately set according to the type of resin powder to be used and the heating temperature, but is usually preferably 1 minute or more. More preferably, it is more than 5 minutes.
- the heating time is preferably 40 minutes or less, particularly preferably 30 minutes or less.
- the heating time is less than 1 minute, the crosslinking reaction (curing) does not proceed sufficiently, and the desired properties of the coating film tend not to be obtained. If the heating time exceeds 40 minutes, However, there is a tendency that the resin is yellowed or brittle.
- the thickness of the coating film formed by heating is not limited, it is usually preferably in the range of 20 to 100 zm.
- An isoparaffin solvent having a boiling point of 173 189 ° C (Isosol manufactured by Nippon Petrochemical Co., Ltd.) to deposit a resin film containing a charge controlling agent on aluminum flakes as base particles while maintaining stirring. 300) 360 g was gradually dropped in about one hour. Further, while maintaining the stirring, vacuum drying was performed at 60 ° C. to remove only ethyl acetate.
- a flake pigment according to the present invention comprising flake pigments, ie, base particles having a flake-like shape, and a film containing a charge control agent covering the surface of the base particles.
- the PCF7670A used here is an acrylic resin-coated aluminum flake with a D50 of 18 ⁇ m (77% metal content).
- D50 is the average particle size, about 0.5 lg of a sample was dispersed in 5 g of 0.5% aqueous solution of Triton X (manufactured by UNION CARBIDE, a surfactant), and the water was used as a solvent. The value was measured after dropping on Microtrac 9320 X-200 and dispersing with ultrasonic waves (40W for 10 seconds).
- a flake pigment was obtained in the same manner as in Example 1, except that the amount of the resin-based charge control agent for negative charging Ataribase FCA-1001-NS manufactured by Fujikura Kasei Co., Ltd. was changed to 0.3 g. On the other hand, 2% by weight of Fujikura Kasei Co., Ltd.
- a flake pigment coated with the charge control agent obtained above was mixed with the resin powder containing the charge control agent, and a powder metallic paint and a coating film were prepared in the same manner as in Example 1, and the introduction rate, Coating Film Luminance, occurrence of spits, and base concealment were confirmed.
- Example 1 The temperature in the system was raised to 80 ° C., 0.6 g of azobisisobutyl nitrile was added, and the mixture was reacted at 80 ° C. for 6 hours while stirring.
- the obtained slurry dispersion was dried with a Buchner funnel, and then a final flake pigment was obtained in the same manner as in Example 1.A powdery metallic paint and a coating film were produced in the same manner as in Example 1. Then, the introduction rate, the sense of brightness of the coating film, the state of occurrence of spits, and the concealment property of the base were confirmed.
- a flake pigment was obtained in the same manner as in Example 1, except that the amount of NS was changed to 0.3 g.
- a coated plate for color tone evaluation was prepared in the same manner as in Example 1, and the introduction ratio was measured and the spits were evaluated in the same manner.
- Example 1 Except for using PCF7670A before coating the aluminum flakes used in the paint preparation with the charge control agent (that is, using a flake pigment containing no charge control agent), the same method as in Example 1 was used. An evaluation was performed.
- the evaluation was performed in the same manner as in Comparative Example 1 except that it was used.
- Example 115 The following evaluation was performed as a common evaluation item of Example 115 and Comparative Example 112.
- the brightness of the coating film was evaluated using the evaluation parameter ⁇ ⁇ .
- aluminum flakes are used as the base particles of the flake pigment, and no color pigment is contained.
- ⁇ / ⁇ 110 is desirable.
- This evaluation parameter that is, ⁇ Z a is
- Equation 4 L is a lightness index (L * aV colorimetric system (CIE is 1), measured at an observation angle ⁇ using a spectrophotometer (trade name “X-Rite M A68” manufactured by X-Rite). The color system based on the uniform color space defined in 976)), ⁇ indicates the observation angle, ⁇ , / 3 and ⁇ indicate constants.
- CIE colorimetric system
- Flake pigment or powder coating with aluminum flakes to be measured as base particles Resin powder and acrylic-coated ferrite carrier (FB100, manufactured by Powdertech Co., Ltd.) in a ratio of 3:97 for 10 minutes and 200 times of friction After charging, the charge value (xCZg) was measured using a blow-off powder charge amount measurement device # -200 manufactured by Toshiba Chemical Corporation.
- Table 1 shows the composition of Examples and Comparative Examples
- Table 2 shows the evaluation results.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005513272A JPWO2005019350A1 (ja) | 2003-08-21 | 2004-08-13 | 帯電調整剤を含有する皮膜を備えたフレーク顔料、それを含んだ粉体メタリック塗料、それを用いた塗膜およびそのフレーク顔料の製造方法 |
US10/568,530 US20060287412A1 (en) | 2003-08-21 | 2004-08-13 | Flake pigment having film containing charge regulating agent, powder metallic paint containing it, coating using it, and process for producing flake pigment |
EP04771651A EP1666545A1 (en) | 2003-08-21 | 2004-08-13 | Flake pigment having film containing charge regulating agent, powder metallic paint containing it, coating using it and process for producing flake pigment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003297602 | 2003-08-21 | ||
JP2003-297602 | 2003-08-21 |
Publications (1)
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WO2005019350A1 true WO2005019350A1 (ja) | 2005-03-03 |
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ID=34213651
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/011684 WO2005019350A1 (ja) | 2003-08-21 | 2004-08-13 | 帯電調整剤を含有する皮膜を備えたフレーク顔料、それを含んだ粉体メタリック塗料、それを用いた塗膜およびそのフレーク顔料の製造方法 |
Country Status (4)
Country | Link |
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US (1) | US20060287412A1 (ja) |
EP (1) | EP1666545A1 (ja) |
JP (1) | JPWO2005019350A1 (ja) |
WO (1) | WO2005019350A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007505962A (ja) * | 2003-09-19 | 2007-03-15 | ビーエーエスエフ コーティングス アクチェンゲゼルシャフト | 効果顔料が添加された粉末状の被覆材料、その製造方法及びその使用 |
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 |
WO2017086326A1 (ja) * | 2015-11-20 | 2017-05-26 | セイコーエプソン株式会社 | シート製造装置、シート製造方法及び樹脂粉体 |
JP7378981B2 (ja) | 2018-06-29 | 2023-11-14 | ヴァイアヴィ・ソリューションズ・インコーポレイテッド | 機能性分子を有する光学道具 |
Families Citing this family (2)
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US20080132599A1 (en) | 2006-11-30 | 2008-06-05 | Seiko Epson Corporation. | Ink composition, two-pack curing ink composition set, and recording method and recorded matter using these |
US8894197B2 (en) | 2007-03-01 | 2014-11-25 | Seiko Epson Corporation | Ink set, ink-jet recording method, and recorded material |
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- 2004-08-13 US US10/568,530 patent/US20060287412A1/en not_active Abandoned
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- 2004-08-13 EP EP04771651A patent/EP1666545A1/en not_active Withdrawn
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Cited By (7)
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JP2007505962A (ja) * | 2003-09-19 | 2007-03-15 | ビーエーエスエフ コーティングス アクチェンゲゼルシャフト | 効果顔料が添加された粉末状の被覆材料、その製造方法及びその使用 |
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 |
WO2017086326A1 (ja) * | 2015-11-20 | 2017-05-26 | セイコーエプソン株式会社 | シート製造装置、シート製造方法及び樹脂粉体 |
CN108350634A (zh) * | 2015-11-20 | 2018-07-31 | 精工爱普生株式会社 | 薄片制造装置、薄片制造方法以及树脂粉体 |
JPWO2017086326A1 (ja) * | 2015-11-20 | 2018-08-09 | セイコーエプソン株式会社 | シート製造装置、シート製造方法及び樹脂粉体 |
US11518062B2 (en) | 2015-11-20 | 2022-12-06 | Seiko Epson Corporation | Sheet manufacturing method |
JP7378981B2 (ja) | 2018-06-29 | 2023-11-14 | ヴァイアヴィ・ソリューションズ・インコーポレイテッド | 機能性分子を有する光学道具 |
Also Published As
Publication number | Publication date |
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US20060287412A1 (en) | 2006-12-21 |
EP1666545A1 (en) | 2006-06-07 |
JPWO2005019350A1 (ja) | 2007-11-22 |
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