WO2016042824A1 - 塗料組成物および該塗料組成物により形成された塗膜を有する塗布物 - Google Patents
塗料組成物および該塗料組成物により形成された塗膜を有する塗布物 Download PDFInfo
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- WO2016042824A1 WO2016042824A1 PCT/JP2015/061789 JP2015061789W WO2016042824A1 WO 2016042824 A1 WO2016042824 A1 WO 2016042824A1 JP 2015061789 W JP2015061789 W JP 2015061789W WO 2016042824 A1 WO2016042824 A1 WO 2016042824A1
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- coating composition
- mica
- aluminum
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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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
- C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Definitions
- the present invention relates to a coating composition and a coated article having a coating film formed from the coating composition, and more specifically, a coating composition containing an aluminum pigment and a mica pigment and the coating composition.
- the present invention relates to a coated product having a coating film.
- Coating compositions containing metal pigments exhibit excellent metallic feel when forming a coating film, so they are used in many fields such as automobile exteriors, decorative plastics, printing inks, and cosmetics. ing.
- metal pigments aluminum pigments are widely used because they are excellent in metallic feel and are inexpensive and easy to handle due to their low specific gravity.
- the coating composition containing the mica pigment exhibits excellent interference feeling (also expressed as interference action or pearl feeling) due to the mica pigment when the coating film is formed.
- interference feeling also expressed as interference action or pearl feeling
- coating compositions containing an aluminum pigment and a mica pigment have been studied (for example, JP 2001-181575 A (Patent Document 1) and JP 2011-162732 A (Patent Document 2)).
- the coating film formed by the coating composition containing both pigments can exhibit both the metallic tone and the interference tone.
- a coating composition containing an aluminum pigment and a mica pigment usually contains a large amount of mica pigment when compared with the content of the aluminum pigment and the mica pigment. This is because the interference action of the mica pigment is strongly expressed.
- the interference sensation expressed by the mica pigment tends to be easily offset by the metallic sensation exhibited by the aluminum pigment when the aluminum pigment is blended to the same degree or more than the mica pigment. For this reason, as described in Examples of Patent Document 1 and Patent Document 2, etc., in order to sufficiently show an interference feeling in a coating film formed from a coating composition containing an aluminum pigment and a mica pigment, It was necessary to sufficiently increase the content of mica pigment relative to the content of aluminum pigment.
- the present invention has been made in view of the above situation, and the object of the present invention is to have a coating composition containing an aluminum pigment and a mica pigment and a coating film formed from the coating composition.
- a coating composition having a low content of mica pigment as compared with the prior art and capable of exhibiting a sufficient metallic and interference feeling, and a coating having a coating film formed from the coating composition To provide things.
- the coating composition of the present invention is a coating composition containing an aluminum pigment and a mica pigment, and the content of the aluminum pigment is equal to or greater than the content of the mica pigment.
- the specific surface area is 55000 cm 2 / g or less, the average thickness is 0.3 ⁇ m or more, and the aspect ratio is 50 or less.
- the ratio (A) / (B) of the aluminum pigment content (A) to the mica pigment content (B) is preferably 1 or more and 5 or less.
- the present invention also relates to a coated product having a coating film formed from the coating composition and a coated product having a coating film formed from the resin composition.
- the coating composition of the present invention and the coating material having a coating film formed from the resin composition have a lower mica pigment content relative to the aluminum pigment content than before, and a sufficient metallic and interference feeling. Can be shown.
- the coating composition of the present invention contains an aluminum pigment and a mica pigment.
- An aluminum pigment and a mica pigment are contained in a coating film formed by applying the paint composition, both in a metallic tone that is exhibited by the aluminum pigment and an interference that is exhibited by the mica pigment. It is for showing.
- metallic feel is a bright color tone such as metallic luster that is visually recognized.
- “interference” means that various hues are expressed depending on the angle viewed by the observer and are visually recognized.
- the aluminum pigment contained in the coating composition of the present invention has a specific surface area of 55000 cm 2 / g or less by BET method, an average thickness of 0.3 ⁇ m or more, and an aspect ratio (average particle diameter ⁇ m / average thickness). ⁇ m) is 50 or less.
- the shape of an aluminum pigment is not specifically limited, In order for a coating composition to show a more excellent metallic feeling, it is preferable that it is flake shape.
- the average thickness of the aluminum pigment can be determined as follows. That is, the water surface diffusion area A (cm 2 / g) of the aluminum pigment is measured according to JIS-K5906 (1998), and the aluminum density B (g / cm 3 ) is further measured. And the average thickness C (micrometer) of an aluminum pigment can be calculated
- Such an aluminum pigment can be obtained, for example, by grinding or grinding aluminum powder as a raw material using a grinding aid such as a fatty acid in the presence of a grinding medium in a mill such as a ball mill or an attritor mill. . Moreover, what is obtained by crushing the aluminum vapor deposition foil which vapor-deposited aluminum on the film may be used.
- pulverization medium mineral oil of high flash point, such as a mineral spirit and solvent naphtha, can be used.
- the composition of the aluminum pigment may be composed of only aluminum or may be composed of an aluminum-based alloy, and the purity of aluminum is not particularly limited.
- the surface may be subjected to a surface treatment such as a metal oxide film for improving corrosion resistance and design properties.
- the average particle diameter of the aluminum pigment is not particularly limited, but the lower limit is preferably 1 ⁇ m or more, more preferably 7 ⁇ m or more, and further preferably 10 ⁇ m or more. Moreover, as an upper limit, Preferably it is 100 micrometers or less, More preferably, it is 30 micrometers or less, More preferably, it is 25 micrometers or less.
- the average particle diameter is 1 ⁇ m or more, since the handling at the time of manufacture is easy and the tendency to hardly aggregate is obtained, it can be uniformly dispersed in the coating composition. Moreover, when the average particle diameter is 100 micrometers or less, it can prevent that the coating-film surface becomes rough and can implement
- the average particle diameter is a volume average particle diameter, and can be obtained by calculating a volume average from a particle size distribution measured by a laser diffraction method.
- the mica pigment contained in the coating composition of the present invention is not particularly limited, and may be composed of either natural mica or synthetic mica, or these may be mixed.
- the mica pigment is preferably pearl mica in which a mica (mica) surface is coated with a thin film of a metal oxide such as titanium dioxide, iron oxide, cobalt, tin, or zirconium.
- the shape of the mica pigment is preferably a flake shape.
- both pigments can take a relatively uniform arrangement in the coating film. It is possible to develop a design that achieves both the sense of interference and the brightness that are the respective characteristics.
- mica pigments examples include mica pigments processed and produced from natural mica. Moreover, what was synthesize
- the average particle diameter of the mica pigment is not particularly limited, but the lower limit is preferably 5 ⁇ m or more, more preferably 8 ⁇ m or more. Moreover, as an upper limit, Preferably it is 30 micrometers or less, More preferably, it is 25 micrometers or less. When the average particle size is 5 ⁇ m or more, since the handling at the time of manufacture is easy and the tendency to hardly aggregate is obtained, it can be uniformly dispersed in the coating composition. Moreover, when the average particle diameter is 30 micrometers or less, it can prevent that a coating-film surface becomes rough and can implement
- the coating composition of the present invention can contain other optional components as long as it contains the aluminum pigment and the mica pigment.
- examples of other optional components include other pigments, additives, resins and solvents.
- Examples of the other pigments include organic pigments, inorganic color pigments, extender pigments, and plate-like iron oxide.
- Examples of the additive include a pigment dispersant, an antifoaming agent, an antisettling agent, and a curing catalyst.
- Examples of the resin include epoxy resin, polyester resin, alkyd resin, acrylic resin, acrylic silicone resin, vinyl resin, silicon resin (inorganic binder), polyamide resin, polyamideimide resin, melamine resin, fluororesin, synthetic resin emulsion, and boil. Examples thereof include oil, chlorinated rubber, natural resin and amino resin, phenol resin, and polyisocyanate resin.
- Examples of the solvent include alcohols, glycols, ketones, esters, ethers, aromatics, hydrocarbons and other organic solvents, water, and the like.
- the content (A) of the aluminum pigment is equal to or greater than the content (B) of the mica pigment.
- content in a coating composition means the mass part of each component with respect to 100 mass parts of resin solid content in a coating composition.
- the content (A) of the aluminum pigment in the coating composition is preferably 0.1 parts by mass or more and 30 parts by mass or less, more preferably 1 part by mass with respect to 100 parts by mass of the resin solid content in the coating composition.
- the content (B) of the mica pigment is preferably 0.1 parts by mass or more and 20 parts by mass or less, and more preferably 1 part by mass or more and 15 parts by mass or less.
- the ratio (A) / (B) of the content (A) of the aluminum pigment and the content (B) of the mica pigment is preferably 1 or more.
- the total content of the aluminum pigment and the mica pigment in the coating composition is preferably 1 to 50 parts by weight, more preferably 1 to 30 parts by weight with respect to 100 parts by weight of the resin solid content in the coating composition. More preferably, it is 5 to 20 parts by mass.
- the total content in the coating composition is 1 part by mass or more, the color tone exhibited by each pigment in the coating film can be shown.
- the coating film surface of the coating composition is It is possible to prevent roughening and to achieve a target design.
- the content of the additive is preferably 0.1 to 10 parts by mass and the content of the resin is preferably 5 to 50 parts by mass with respect to 100 parts by mass of the resin solid content in the coating composition.
- the content of the solvent is preferably 40 to 80 parts by mass.
- the total content of all these pigments is preferably 0.2 parts by weight or more and 40 parts by weight or less in the coating composition, More preferably, they are 0.5 mass part or more and 35 mass parts or less, More preferably, they are 1 mass part or more and 25 mass parts or less.
- the coating composition of the present invention is a coating composition containing an aluminum pigment and a mica pigment, and the content (A) of the aluminum pigment is equal to or equal to the content (B) of the mica pigment.
- the aluminum pigment has a BET method specific surface area of 55000 cm 2 / g or less, an average thickness of 0.3 ⁇ m or more, and an aspect ratio of 50 or less. It is equal to or greater than the mica pigment content.
- the content of the mica pigment is set to aluminum after sufficiently securing the content of the aluminum pigment. It was necessary to make it larger than the pigment content.
- the content (A) of the aluminum pigment is equal to or greater than the content (B) of the mica pigment, that is, the content (B) of the mica pigment is aluminum. It is equal to or smaller than the pigment content (A).
- the coating composition of the present invention has a sufficient metallic feeling and interference feeling when a coating film is formed. Can be shown.
- the coating composition of the present invention can realize an equivalent or better design in a state where the content of mica pigment is reduced as compared with the conventional coating composition. For this reason, for example, in addition to being able to exhibit the target color tone, it is possible to suppress a decrease in applicability due to an increase in the total content of pigments in the coating composition, and to reduce the manufacturing cost. Can be realized.
- the specific surface area of the aluminum pigment exceeds 55000 cm 2 / g, the reason why the feeling of interference exhibited by the coating film is not clear, but if the specific surface area is too large, It is considered that the interference feeling of the mica pigment is weakened due to the increase in the number of aluminum flakes contained as the aluminum pigment. Further, when the average thickness of the aluminum pigment is smaller than 0.3 ⁇ m and the aspect ratio exceeds 50, that is, when the shape of the aluminum flake is thin and flat, the aluminum pigment is liable to float in the coating composition. Since the positional relationship is inherited even in the coating film, it is considered that the interference feeling of the mica pigment is weakened as a result.
- the aluminum pigment has a specific surface area of 10,000 cm 2 / g or more by the BET method, an average thickness of 1 ⁇ m or less, and an aspect ratio of 1 or more.
- the coating composition can exhibit a sufficient metallic feeling and interference feeling more reliably.
- the aluminum pigment has a specific surface area of 20000 cm 2 / g or more and 50000 cm 2 / g or less, an average thickness of 0.1 ⁇ m or more and 1.0 ⁇ m or less, and an aspect ratio of 1 or more and 50 or less, More preferably, the specific surface area is 30000 cm 2 / g or more and 50000 cm 2 / g or less, the average thickness thereof is 0.2 ⁇ m or more and 0.6 ⁇ m or less, and the aspect ratio thereof is 15 or more and 45 or less.
- the content (A) of the aluminum pigment is preferably 0.1 parts by mass or more and 30 parts by mass or less, based on 100 parts by mass of the resin solid content in the coating composition.
- it is 1 part by mass or more and 20 parts by mass or less
- the content (B) of the mica pigment is preferably 0.1 part by mass or more and 20 parts by mass or less, more preferably 1 part by mass or more and 15 parts by mass or less. is there.
- a sufficient metallic feeling and a sufficient interference feeling can be exhibited, and the content (A) of the aluminum pigment and the content (B) of the mica pigment in the coating composition are sufficiently low. Can be further suppressed, and a further reduction in manufacturing cost can be realized.
- the ratio (A) / (B) between the content (A) of the aluminum pigment and the content (B) of the mica pigment may be 1 or more.
- a metallic feeling and a sufficient feeling of interference can be achieved.
- the ratio (A) / (B) is preferably 1.5 or more, and more preferably 2 or more.
- the ratio (A) / (B) is preferably 5 or less, more preferably 3 or less, and even more preferably 2 or less in order to achieve a metallic feeling and interference feeling more efficiently. From both viewpoints, the ratio (A) / (B) is preferably 1 or more and 5 or less, more preferably 1 or more and 3 or less, still more preferably 1 or more and 2 or less, and particularly preferably. 1.5 or more and 2 or less.
- the particle size variation of an aluminum pigment is small.
- the value obtained by subtracting the 10% diameter (D 10 ) from the 90% diameter (D 90 ) of the volume cumulative particle size distribution is preferably 25 ⁇ m or less, and more preferably 15 ⁇ m or less. In this case, even when the content of the mica pigment is reduced, high metallic feeling and interference feeling can be exhibited.
- the present invention also relates to a coated product having a coating film formed from the coating composition.
- the coating composition has a sufficient metallic feeling and sufficient interference when a coating film is formed even though the content of the mica pigment is lower than the content of the aluminum pigment as compared with the conventional one. A feeling can be shown. For this reason, the coating material which has this coating film can show sufficient metallic feeling and sufficient interference feeling.
- the material thereof is not particularly limited, such as metal, plastic, ceramic products, glass, wood, concrete, cloth, and paper.
- the shape is also, for example, columns, bridges, guard rails, fastening parts (bolts, nuts, rivets, etc.), sliding parts (seat belt parts, machine tool parts, etc.), mounts (photovoltaic panel mounts, etc.), tanks,
- a three-dimensional structure such as a vehicle or an outdoor storage box (such as a cubicle), a planar object such as a pre-coated metal, a plate material, a wall material, a roof material, or a sheet can be used, and is not particularly limited.
- substrate can be employ
- the coating film of the coating is the coating film of the present invention. That is, the content of the aluminum pigment in the coating film is equal to or greater than the content of mica, and the aluminum pigment has a specific surface area of 55000 cm 2 / g or less according to the BET method and an average thickness of 0.3 ⁇ m.
- the aspect ratio is 50 or less, it can be regarded as a coating film formed from the coating composition of the present invention.
- the coating material of this invention may have another layer, Preferably it is based on the said coating film and has a topcoat on it. By having the top coat, damage to the coating film can be suppressed, and design properties exhibited by the coating film can be enhanced.
- a base treatment layer between a coating film and a base
- the base treatment layer examples include a hot-dip plating layer, a thermal spray plating layer, an electrolytic plating layer, an electroless plating layer, a vapor deposition layer, a chemical conversion treatment layer, an electrodeposition coating layer, an organic primer layer, and a zinc rich primer layer.
- a hot dip galvanized layer, an electrolytic galvanized layer, a chemical conversion treatment layer with an inorganic salt, and an organic primer layer are preferable.
- Particularly preferable base treatment layers include hot dip galvanization, electrogalvanization, chemical conversion treatment with inorganic salts, organic primers, and the like.
- an aluminum pigment and a mica pigment were prepared, and a coating composition containing these in a predetermined content was prepared.
- the prepared coating composition was applied onto a substrate, a top coat agent was further applied, and these were baked to prepare an applied product having a coating film formed from the coating composition. And the metallic feeling and interference feeling which each coating film showed were confirmed by measuring the color tone of each coating film in each coating material.
- D 10 , D 50 , and D 90 indicate particle diameters ( ⁇ m) at volume average particle diameters of 10%, 50%, and 90% in the volume cumulative particle size distribution curve.
- the volume average particle size a laser diffraction / scattering particle size distribution measuring apparatus (trade name: "Microtrac HRA 9320-X100, Honeywell (Honeywell) Co., Ltd.).
- the vertical axis Is the cumulative frequency (%), and in the volume cumulative particle size distribution curve in which the horizontal axis is the particle diameter ( ⁇ m), it means the particle diameter ( ⁇ m) with a cumulative degree of 50%.
- (D 90 ) ⁇ (D 10) indicates the value obtained by subtracting the value of the particle diameter of D 10 from the value of the particle diameter of D 90, means that the variation in the particle size of the aluminum pigment smaller this value is small.
- the specific surface area means a specific surface area calculated by the BET method.
- mica pigment E gold interference color mica pigment (trade name: “Mearlin® Exterior CFS Super Gold 2303Z”, particle size: 7 to 30 ⁇ m)
- mica pigment F blue interference color mica pigment (product name: “Mearlin® Exterior CFS Super Blue 6303Z”, particle size: 9 to 35 ⁇ m) was prepared.
- the mica pigment E exhibited a golden interference feeling
- the mica pigment F exhibited a blue interference feeling.
- ⁇ Preparation of topcoat agent> 420 parts by mass of an acrylic clear resin (trade name: “Acridic A-322”, manufactured by DIC) and 165 parts by mass of a melamine clear resin (trade name: “Super Becamine L117-60”, manufactured by DIC) Add to 228 parts by weight of aromatic solvent (trade name: “Solvesso 100”, manufactured by Exxon Chemical Co., Ltd.), disperse with a glass rod, add additional aromatic solvent, and increase viscosity to 20 seconds with a Ford cup.
- aromatic solvent trade name: “Solvesso 100”, manufactured by Exxon Chemical Co., Ltd.
- Each of aluminum pigment A and mica pigment E is added to 200 parts by weight of thinner and 60 parts by weight of xylene so as to be 11 parts by weight (pigment solids amount) with respect to 100 parts by weight of resin solids in the coating composition.
- the coating composition (base) and the topcoat agent (top) were each applied on the steel plate serving as the substrate with an automatic spray gun under the application conditions shown below. After application, baking was performed under conditions of a temperature of 140 ° C. and a time of 20 minutes to obtain a coating film formed on the steel plate with each coating composition.
- the thickness of each coating film (including the top coat) was 40.0 ⁇ m to 60.0 ⁇ m.
- Examples 2 to 6 Conventional Examples 1 to 4, Comparative Examples 1 and 2>
- Example 2 each example, each conventional example and each comparison were carried out in the same manner as in Example 1, except that the type and content of the aluminum pigment used, the type of mica pigment used and the content thereof were changed to the values shown in Table 2.
- each content is the solid content (mass part) (PHR) of each pigment with respect to 100 mass parts of resin solid content in a coating composition.
- PHR solid content
- Aluminum pigment / mica pigment (ratio)” in Table 2 indicates the ratio (A / B) of the content (A) of the aluminum pigment and the content (B) of the mica pigment in the coating composition.
- the L * value indicates lightness and serves as an index indicating the degree of metallic feeling exhibited by the aluminum pigment contained in the coating composition, and the larger the value, the stronger the metallic tone.
- the b * value indicates the degree of interference, and as the value is a negative value and the value is large, it can be considered that the color tone of the blue-colored interference feeling is strong, the value is a positive value and the value is large. It can be considered that the color tone of the yellowish interference is strong. That is, the larger the absolute value of the b * value, the higher the degree of interference.
- Example 1 the content of aluminum pigment is equivalent to the content of mica pigment, whereas each coating composition used in Conventional Examples 1 to 4 The content of aluminum pigment was smaller than the content of mica pigment. Further, regarding Conventional Example 3 using the same aluminum pigment as in Example 1, the content of mica pigment was higher than that in Example 1, and thus the degree of interference was higher than in Example 1. Similarly, with respect to Conventional Example 4 using the same aluminum pigment as in Example 4, the content of mica pigment was higher than in Example 4, and thus the degree of interference was higher than in Example 4. These are natural consequences. However, regarding the comparison between Example 1 and Example 4 and Conventional Example 1 and Conventional Example 2, in Example 1, although the lightness is higher than that of Conventional Example 1, the degree of interference is sufficiently high. However, the brightness and the degree of interference were not significantly different from those in Conventional Example 2.
- the coating compositions of Example 1 and Example 4 have sufficiently high metallic feeling and interference feeling even when the content of mica pigment is small compared to the coating compositions of Conventional Example 1 and Conventional Example 2. It was confirmed that can be shown. In addition, the coating compositions of Example 1 and Example 4 had a lower total pigment content than the coating compositions of Conventional Example 1 and Conventional Example 2.
- Example 2 Regard the coating compositions of Example 2, Example 3, Example 5 and Example 6, the content of the aluminum pigment of Example 2, Example 3 and Example 5 is twice the content of the mica pigment. The content of the aluminum pigment in Example 6 was 1.5 times the content of the mica pigment.
- content of the aluminum pigment was comparable as content of the mica pigment.
- Example 2 Example 3 and Example 6, the lightness is higher than that in Comparative Example 1, but the degree of interference is not significantly different or slightly higher.
- Example 5 As compared with Comparative Example 2, There was no significant difference in brightness and degree of interference.
- the coating compositions of Example 2, Example 3, Example 5 and Example 6 are less mica pigment content than the coating compositions of Comparative Example 1 and Comparative Example 2, It was confirmed that a sufficiently high metallic feeling and interference feeling can be exhibited. Further, the coating compositions of Example 2, Example 3, Example 5 and Example 6 had a lower total pigment content than the coating compositions of Comparative Examples 1 and 2.
- Example 4 contained less mica pigment than Conventional Example 2 Although the amount of mica pigment in Example 5 is less than that in Comparative Example 2, the same high brightness and high interference feeling as those of Conventional Example 2 and Comparative Example 2 can be exhibited. It was confirmed.
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Abstract
Description
本発明の塗料組成物は、アルミニウム顔料とマイカ顔料とを含む。アルミニウム顔料とマイカ顔料とを含むのは、当該塗料組成物が塗布されることによって形成される塗膜において、アルミニウム顔料により発揮されるメタリック感と、マイカ顔料により発揮される干渉感との両色調を示させるためである。
本発明の塗料組成物に含まれるアルミニウム顔料は、BET法による比表面積が55000cm2/g以下であり、その平均厚みが0.3μm以上であり、かつそのアスペクト比(平均粒径μm/平均厚みμm)が50以下である。アルミニウム顔料の形状は特に限定されないが、塗料組成物がより優れたメタリック感を奏するためには、フレーク形状であることが好ましい。
(なお、上記計算式(1)は、水面拡散面積で形成された膜を単一膜として捉え、この面積と比重との関係から膜を構成するアルミニウム顔料の平均厚みを求めるものである)。
本発明の塗料組成物に含まれるマイカ顔料は、特に制限されず、天然マイカ、合成マイカのいずれかから構成されてもよく、これらが混合されていてもよい。マイカ顔料は、好ましくは、マイカ(雲母)の表面に二酸化チタン、酸化鉄、コバルト、錫、ジルコニウムなどの金属酸化物の薄膜をコーティングしたパールマイカである。また、マイカ顔料の形状は好ましくはフレーク形状である。この場合、塗料組成物中に上記マイカ顔料とアルミニウム顔料とを特定の配合比率および任意の添加量で含有させることにより、塗膜中において両顔料は比較的均一な配列をとることができるため、それぞれの特徴である干渉感と輝度感とを両立させた意匠を発現することができる。
本発明の塗料組成物は、上記アルミニウム顔料と上記マイカ顔料とを含む限り、他の任意の成分を含むことができる。他の任意の成分としては、たとえば他の顔料、添加剤、樹脂および溶剤などを挙げることができる。
本発明の塗料組成物において、アルミニウム顔料の含有量(A)は、マイカ顔料の含有量(B)と等しいかそれよりも大きい。ここで、塗料組成物における含有量とは、塗料組成物中の樹脂固形分100質量部に対する各成分の質量部を意味する。
本発明の塗料組成物は、上述のように、アルミニウム顔料とマイカ顔料とを含む塗料組成物であって、アルミニウム顔料の含有量(A)は、マイカ顔料の含有量(B)と等しいかそれよりも大きく、アルミニウム顔料は、BET法による比表面積が55000cm2/g以下であり、その平均厚みが0.3μm以上であり、かつそのアスペクト比が50以下であり、アルミニウム顔料の含有量は、マイカ顔料の含有量と等しいかそれよりも大きい。
本発明は、上記塗料組成物により形成された塗膜を有する塗布物にもかかわる。上記塗料組成物は、上述のように、従来と比してアルミニウム顔料の含有量に対するマイカ顔料の含有量が低いにも関わらず、塗膜を形成した際に、十分なメタリック感と十分な干渉感を示すことができる。このため、この塗膜を有する塗布物は、十分なメタリック感と十分な干渉感とを示すことができる。
表1に示す特性を有するアルミニウム顔料A~Dを準備した。表1において、D10、D50、D90は、体積累積粒度分布曲線における体積平均粒子径10%、50%、90%での粒子径(μm)を示す。なお、体積平均粒子径は、レーザ回折/散乱式粒子径分布測定装置(商品名:「Microtrac HRA 9320-X100、ハネウェル(Honeywell)社製)を用いて測定した。たとえば、D90は、縦軸が累積頻度(%)であり、横軸が粒子径(μm)である体積累積粒度分布曲線において、累積度50%の粒子径(μm)を意味する。また、「(D90)-(D10)」は、D90の粒子径の値からD10の粒子径の値を引いた値を示し、この値が小さいほどアルミニウム顔料の粒径のばらつきが小さいことを意味する。また、比表面積はBET法により算出される比表面積を意味する。
マイカ顔料Eとして、金色干渉色のマイカ顔料(商品名:「Mearlin(R) Exterior CFS Super Gold 2303Z」、粒径:7~30μm)、マイカ顔料Fとして、青色干渉色のマイカ顔料(商品名:「Mearlin(R) Exterior CFS Super Blue 6303Z」、粒径:9~35μm)を準備した。なお、マイカ顔料Eは金色の干渉感を示し、マイカ顔料Fは青色の干渉感を示した。
まず、アクリルクリヤー樹脂(商品名:「アクリディックA-322」、DIC社製)420質量部およびメラミンクリヤー樹脂(商品名:「スーパーベッカミンL117-60」、DIC社製)165質量部を、芳香族系溶剤(商品名:「ソルベッソ100」、エクソン化学(株)製)228質量部中に加え、ガラス棒で分散したのち、芳香族系溶剤をさらに加えて、フォードカップで20秒に粘度調整し、トップコート剤を作製した。
アルミニウム顔料Aおよびマイカ顔料Eのそれぞれを、塗料組成物中において樹脂固形分100質量部に対して11質量部(顔料固形分量)となるように、シンナー200質量部およびキシレン60質量部に加えてガラス棒で分散させた後、アクリルクリヤー樹脂(商品名:「アクリディックA-322」、DIC社製)160g質量部(樹脂固形分の80質量部を構成)およびメラミンクリヤー樹脂(商品名:「スーパーベッカミンL117-60」、DIC社製)33.3質量部(樹脂固形分の20質量部を構成)とともに、ディスパーにて、15分間1000rpmで撹拌分散させることにより、塗料組成物前駆体を得た。そして得られた塗料組成物前駆体にシンナーを加えてフォードカップで13.5秒に粘度調整し、塗料組成物を作製した。
レシプロケーター速度 50m/分
レシプロケーターストローク 1250mm
コンベア移動速度 2m/分
吹き付け距離 30cm
吐出量(ベース) 400ml/分
吐出量(トップ) 420ml/分
同一塗料のパス回数(ベース) 3pass
同一塗料のパス回数(トップ) 2pass
1パス後のガンの待機時間 5分
同一ガンで1パスから2パスへの待機時間 2分。
用いるアルミニウム顔料の種類およびその含有量、用いるマイカ顔料の種類およびその含有量を表2に示す値に変更した以外は、実施例1と同様の方法により、各実施例、各従来例および各比較例において塗膜を得た。なお、各含有量は、塗料組成物中の樹脂固形分100質量部に対する各顔料の固形分量(質量部)(PHR)である。また、表2の「アルミニウム顔料/マイカ顔料(比率)」は、塗料組成物中におけるアルミニウム顔料の含有量(A)とマイカ顔料の含有量(B)との比率(A/B)を示す。
形成された塗膜に関し、JIS-Z8722(2009)(色の測定方法-反射および透過物体色)の条件aに記載の方法に従って測定したY値から、JIS-Z8729(2004)(色の表示方法-L*a*b*表色系およびL*u*v*表色系)に規定されるL*15およびb*15を得た。具体的には、マルチアングル分光測色計(商品名:「X-Rite MA-68II」、X-Rite社製)を用いて、入射角45°、正反射方向からのオフセット角15°におけるL*値およびb*値を測定した。その結果を表2に示す。
Claims (3)
- アルミニウム顔料とマイカ顔料とを含む塗料組成物であって、
前記アルミニウム顔料の含有量は、前記マイカ顔料の含有量と等しいかそれよりも大きく、
前記アルミニウム顔料は、BET法による比表面積が55000cm2/g以下であり、その平均厚みが0.3μm以上であり、かつそのアスペクト比が50以下である、塗料組成物。 - 前記アルミニウム顔料の含有量Aと前記マイカ顔料の含有量Bとの比A/Bは1以上5以下である、請求項1に記載の塗料組成物。
- 請求項1または2に記載の塗料組成物により形成された塗膜を有する塗布物。
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CN201580049969.0A CN106687544B (zh) | 2013-09-27 | 2015-04-17 | 涂料组合物以及具有由该涂料组合物形成的涂膜的涂布物 |
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