JP2021105132A - Pigment, composition and article - Google Patents

Abstract

To provide a pigment capable of exhibiting high designability and beautifulness, a composition containing the pigment, and an article having a coating using the composition.SOLUTION: There is provided a pigment containing a multilayer structure, the multilayer structure containing a polarizing layer 20 and a birefringence layer 30 in order. A composition containing the pigment, and an article having a coating using the composition are also provided.SELECTED DRAWING: Figure 1

Description

The present invention relates to pigments, compositions and articles.

Pigments are contained in, for example, paints and cosmetics, and have a function of imparting design to an object on which the paint is applied and beautifying the human body to which the cosmetics are rubbed.

Majora (registered trademark) paint manufactured by Nippon Paint Co., Ltd. is an example of a paint that imparts high design to an object. This Majora paint contains a chroma flare pigment. This chromaflare pigment has a five-layer structure so that about 50% of the incident light is reflected by the surface layer and the remaining about 50% is reflected by the central Opaque Reflector Metal. It is set. Due to this spectral effect, interference wavelengths are generated, and the color changes depending on the viewing angle of the object, and the Majora paint expresses high design.

In addition, as a multilayer reflective pigment, a multilayer reflective pigment containing at least one reflective layer and at least one circularly polarizing layer has been proposed (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-315243

However, chromaflare pigments and Majora paints containing those pigments have the disadvantage of being very expensive.

Further, in Patent Document 1, there is no specific description of actually producing the multilayer reflective pigment, and there is no description of specific experimental results using the multilayer reflective pigment.

Therefore, an object of the present invention is to provide a pigment that is cheaper and can exhibit high designability or cosmeticity.

Another object of the present invention is to provide a composition containing such a pigment.

Another object of the present invention is to provide an article having a high degree of design.

The pigment according to the present invention is a pigment containing a multi-layer structure.
The multilayer structure, in order,
Polarizing layer and
A pigment that includes a birefringent layer. Thereby, it is cheaper and can exhibit high designability or cosmeticity.

In one embodiment of the pigment according to the present invention, the multilayer structure is sequentially arranged.
With the polarizing layer (first polarizing layer),
With the birefringent layer
Includes a reflective layer or a second polarizing layer.

The composition according to the present invention is a composition containing any of the above pigments.

In one embodiment of the composition according to the present invention, the composition is a coating composition.

In one embodiment of the composition according to the present invention, the composition is a cosmetic composition or a decorative composition.

The article according to the present invention is an article having a coating film using any of the above compositions. Thereby, it is possible to provide an article having a high design property.

According to the present invention, it is possible to provide a pigment that is cheaper and can exhibit high designability or cosmeticity. According to the present invention, it is possible to provide a composition containing such a pigment. According to the present invention, it is possible to provide an article having a high degree of design.

FIG. 1 is a schematic view showing a cross section of an example of a multilayer structure of a pigment according to the present invention. FIG. 2 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 3 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 4 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 5 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 6 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 7 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 8 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. FIG. 9 is a schematic view showing a cross section of another example of the pigment according to the present invention. FIG. 10 is a schematic view showing a cross section of another example of the pigment according to the present invention.

Hereinafter, embodiments of the present invention will be described. These descriptions are for the purpose of exemplifying the present invention and do not limit the present invention in any way.

In the present invention, two or more embodiments can be arbitrarily combined.

In the present invention, the coating material and the coating composition can be used interchangeably.

As used herein, visible light refers to electromagnetic waves in the wavelength range of 380 to 780 nm.

In the present specification, transmission and passage can be used interchangeably.

In the present specification, the numerical range is intended to include the upper limit value and the lower limit value of the range unless otherwise specified. For example, 380 to 780 nm means 380 nm or more and 780 nm or less.

The scale of each layer is not accurate because the attached drawings are schematic views that prioritize facilitating the understanding of the multi-layer structure of pigments.

(Pigment)
The pigment according to the present invention is a pigment containing a multi-layer structure.
The multilayer structure, in order,
Polarizing layer and
A pigment that includes a birefringent layer.

Although not limited to this, for example, the mechanism by which the pigment of the present invention expresses high designability is as follows. (1) Of the natural light incident from the polarizing layer (first polarizing layer) in the pigment of the present invention, linearly polarized light parallel to the transmission axis (polarization axis) of the polarizing layer passes through the polarizing layer. (2) Next, when the linearly polarized light passes through the birefringent layer, the polarized state changes. Here, the above (1) and (2) occur at each wavelength of visible light (that is, each color), and the polarization state after passing through the birefringence layer in (2) is different at each wavelength. (3) Next, the light whose polarization state has changed is the second polarization layer (the first polarization layer in another pigment of the present invention located in the traveling direction, or the second polarization in the same pigment. When the light is transmitted through the layer), the proportion of the vibration component parallel to the transmission axis of the second polarizing layer is different because the polarization state is different at each wavelength, so the intensity of the light transmitted through the second polarizing layer at each wavelength is different. Is different. (4) Colors corresponding to wavelengths with high transmitted light intensity appear strong to the observer, and colors corresponding to wavelengths with weak transmitted light intensity appear weak to the observer, and these colors are combined. The color is observed by the observer. (5) Then, the color finally observed changes depending on the positions of a plurality of pigments existing in the coating film using the pigment, the thickness of the birefringent layer, the angle at which the coating film is observed, and the like, resulting in high designability. Is expressed.

Hereinafter, the multilayer structure constituting the pigment according to the present invention will be described.

The pigment according to the present invention includes a multilayer structure, and the multilayer structure includes, in order, a polarizing layer and a birefringent layer.

FIG. 1 is a schematic view showing a cross section of an example of a multilayer structure of a pigment according to the present invention. In the example of this pigment 1, the multilayer structure 10 includes a polarizing layer 20 and a birefringent layer 30 in order.

FIG. 2 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of the pigment 1, the multilayer structure 10 includes, in order, a polarizing layer (first polarizing layer) 20, a birefringent layer 30, and a second polarizing layer 21.

FIG. 3 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of the pigment 1, the multilayer structure 10 includes a polarizing layer 20, a birefringent layer 30, and a reflecting layer 40 in order.

FIG. 4 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of the pigment 1, the multilayer structure 10 includes a polarizing layer 20, an adhesive layer 50, and a birefringent layer 30 in order.

FIG. 5 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of the pigment 1, the multilayer structure 10 includes, in order, a polarizing layer (first polarizing layer) 20, an adhesive layer 50, a birefringent layer 30, an adhesive layer 50, and a second polarizing layer 21.

FIG. 6 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of the pigment 1, the multilayer structure 10 includes a polarizing layer 20, an adhesive layer 50, a birefringent layer 30, an adhesive layer 50, and a reflective layer 40 in order.

FIG. 7 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of this pigment 1, the multilayer structure 11 includes a polarizing layer 20 and a birefringent layer 30 in order. The pigment 1 has a spherical core-shell type multilayer structure 11, the core portion of which is the birefringent layer 30, and the shell portion of which is the polarizing layer 20.

FIG. 8 is a schematic view showing a cross section of another example of the multilayer structure of the pigment according to the present invention. In the example of this pigment 1, the multilayer structure 11 includes a polarizing layer 20 and a birefringent layer 30 in order. The pigment 1 has a rectangular parallelepiped core-shell type multilayer structure 11, the core portion of which is the birefringent layer 30, and the shell portion of which is the polarizing layer 20.

-Polarizing layer As described above, the polarizing layer is a layer having a function of polarizing natural light such as sunlight and artificial light. When the multilayer structure of the pigment according to the present invention includes two or more polarizing layers such as the second polarizing layer described later, the polarizing layer described here is treated as the first polarizing layer.

The polarizing layer is not particularly limited, and a known polarizing layer can be appropriately selected. Examples of the polarizing layer include a linear polarizing layer, a circular polarizing layer, and an elliptically polarizing layer, depending on the type of polarized light after passing through the polarizing layer. Further, the polarizing layer may be an absorption type polarizing layer that absorbs light that does not pass through the polarizing layer, or may be a reflection type polarizing layer that reflects light that does not pass through the polarizing layer.

Examples of the absorption type polarizing layer include a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer. Examples of the absorption type polarizing layer include those described in JP-A-2014-197163, JP-A-2013-130882, and JP-A-2017-090637.

Examples of the dichroic dye-based polarizing layer include a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, and an ethylene / vinyl acetate copolymer system partially saponified film, and dichroic or dichroic. Examples thereof include those obtained by adsorbing a dichroic substance such as a dye and stretching the film uniaxially.

In one embodiment, the polarizing layer is at least one selected from the group consisting of a linearly polarized layer, a circularly polarized layer, and an elliptically polarized layer. In another embodiment, the polarizing layer is a linearly polarized layer.

In one embodiment, the polarizing layer is at least one selected from the group consisting of a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer. In another embodiment, the polarizing layer is a dichroic dye-based polarizing layer.

A commercially available product may be used as the polarizing layer. Examples of commercially available polarizing layers include Polar Techno's trade name SKN-18243T (absorbent polarizing film, iodine-based); SHC-215U, SHC-115U, SHC-125U, SHC-13U, SHC-B15U, SHC- B25U, SHC-SR3UL2S, VHC-12, VHC-128 (absorbent polarizing film, dye type); SKN-18243HN-31, SKN-18243HN-33 (semi-absorbent / semi-reflective polarizing film, iodine type); SHC- 115UH-31, SHC-115UH-33, SHC-115UH-41, SHC-125UH-31, SHC-125UH-33, SHC-125UH-41 (semi-absorbent / semi-reflective polarizing film, dye type); T1-SKW845U -SR (reflective polarizing film, iodine-based); SHC-115M, SHC-115R, SHC-125M, SHC-125R (reflective polarizing film, dye-based); WGF (registered trademark) of Asahi Kasei Co., Ltd. (wire grid polarizing layer) ) And so on.

The thickness of the polarizing layer may be appropriately adjusted, for example, 0.5 to 500 μm, preferably 10 to 250 μm. In one embodiment, the thickness of the polarizing layer is 10 μm or more, 20 μm or more, 30 μm or more, 40 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more, 100 μm or more, 110 μm or more, 120 μm or more, 130 μm or more. , 140 μm or more, 150 μm or more, 160 μm or more, 170 μm or more, 180 μm or more, 190 μm or more, 200 μm or more, 210 μm or more, 220 μm or more, 230 μm or more, 240 μm or more, or 250 μm or more. In another embodiment, the thickness of the polarizing layer is 250 μm or less, 240 μm or less, 230 μm or less, 220 μm or less, 210 μm or less, 200 μm or less, 190 μm or less, 180 μm or less, 170 μm or less, 160 μm or less, 150 μm or less, 140 μm or less, 130 μm. Below, 120 μm or less, 110 μm or less, 100 μm or less, 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, 20 μm or less or 10 μm or less.

The polarizing layer may or may not transmit light having wavelengths in other regions (for example, infrared rays and ultraviolet rays) as long as it can transmit at least a part of visible light.

When the multilayer structure of the pigment includes a plurality of polarizing layers, each polarizing layer may have the same material; the type of polarized light transmitted; the type of the polarizing layer; and the thickness, etc., or may be different. ..

The number of polarizing layers in the multilayer structure of the pigment may be one layer or two or more layers. In one embodiment, the number of polarizing layers in the multi-layered structure of the pigment is one. In another embodiment, the number of polarizing layers in the multi-layered structure of the pigment is two.

-Birefringent layer As described above, the birefringent layer is a layer having a function of changing the polarization state of the light transmitted through the polarizing layer.

The birefringent layer can be appropriately selected from known birefringent layers and retardation layers. For example, as the double refraction layer, a 1/2 wave plate (λ / 2 double refraction layer or λ / 2 retardation layer) that imparts a phase difference of 1/2 wavelength to transmitted light, and 1/4 wavelength to transmitted light. Examples thereof include a 1/4 wave plate (λ / 4 compound refracting layer or λ / 4 retardation layer) that imparts a phase difference of 1 minute, and a C plate.

In one embodiment, the birefringent layer is at least one selected from the group consisting of a 1/2 wave plate, a 1/4 wave plate and a C plate. In another embodiment, the birefringent layer is at least one selected from the group consisting of 1/2 wave plates and 1/4 wave plates.

In one embodiment, the phase difference due to the birefringent layer is at least one selected from the group consisting of one wavelength (360 °), 1/2 wavelength (180 °) and 1/4 wavelength (90 °). In another embodiment, the phase difference due to the birefringent layer is at least one selected from the group consisting of 1/2 wavelength (180 °) and 1/4 wavelength (90 °). In yet another embodiment, the phase difference due to the birefringent layer is 1/2 wavelength (180 °). In one embodiment, the phase difference is a value at a wavelength of 380 nm. In another embodiment, the phase difference is a value at a wavelength of 550 nm. In another embodiment, the phase difference is a value at a wavelength of 780 nm.

Examples of the birefringent layer include a birefringent film containing a thermoplastic resin, an alignment film in which a liquid crystal monomer is oriented and then crosslinked and polymerized, an alignment film of a liquid crystal polymer, and a film in which an alignment layer of a liquid crystal polymer is laminated. can give. In addition, for example, the birefringent layer described in JP2013-130882A can be mentioned.

As the birefringent layer, a commercially available product may be used. Commercially available products of the birefringent layer include, for example, cellophane film, cellophane tape; Zeonoa film manufactured by Nippon Zeon (registered trademark); Pure Ace manufactured by Teijin (registered trademark); WV film manufactured by Fujifilm; JX liquid crystal. Examples include NH film and NV film manufactured by the company.

The thickness of the birefringent layer may be appropriately adjusted in consideration of the function of changing the polarization state of the light transmitted through the polarizing layer, for example, 0.1 μm to 3.0 mm, preferably 1 μm to 1 mm. , More preferably 5 to 100 μm. In one embodiment, the thickness of the birefringent layer is 5 μm or more, 10 μm or more, 20 μm or more, 30 μm or more, 40 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more or 100 μm or more. In another embodiment, the thickness of the birefringent layer is 100 μm or less, 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, 20 μm or less, 10 μm or less or 5 μm or less.

The birefringent layer may or may not transmit light having wavelengths in other regions (for example, infrared rays and ultraviolet rays) as long as it can transmit at least a part of visible light.

In the multilayer structure of the pigment of the present invention, the polarizing layer and the birefringent layer may be arranged adjacent to each other as shown in FIGS. 1 to 3, for example, as shown in FIGS. 4 to 6. It may be arranged via another one or more layers such as an adhesive layer. For example, when the birefringent layer itself has adhesiveness such as cellophane tape, the polarizing layer and the birefringent layer can be arranged adjacent to each other without using the adhesive layer. In the present invention, in order to include the layer A and the layer B, the layer A and the layer B may be adjacent to each other, or one or two or more other layers may be provided between the layer A and the layer B. Indicates that it may exist. The same applies when the number of layers is three or more.

When the multilayer structure of the pigment includes a plurality of birefringent layers, each birefringent layer may have the same material; the type of the birefringent layer; and the thickness, etc., or may be different.

The number of birefringent layers in the multi-layer structure of the pigment may be one layer or two or more layers.

In one embodiment of the pigment according to the present invention, the multilayer structure is sequentially arranged.
With the polarizing layer (first polarizing layer),
With the birefringent layer
Includes a reflective layer or a second polarizing layer.

-Reflective layer The reflective layer reflects light (visible light) such as light transmitted through a multilayer structure such as a polarizing layer and a compound refracting layer (visible light); or light transmitted through a multilayer structure of another pigment (visible light). It is a layer having a function to perform.

The reflective layer may have a function of reflecting light as described above, and a known reflective layer such as an optical laminate can be used. Examples of the reflective layer include a thin film made of a metal such as Al, Sn, Cu, Au, Ag, Cr, and Fe, a metal vapor deposition film, plating, and a metal base material; for example, Sb ₂ S ₃ , Fe ₂ O ₃ , and TIO. ₂ , CdS, CeO ₂ , ZnS, PbCl ₂ , CdO, SbO ₃ , WO ₃ , SiO, Si ₂ O ₃ , In ₂ O ₃ , PbO, Ta ₂ O ₃ , ZnO, Cd ₂ O ₃ , Al ₂ O ₃ A permeable thin film made of such an inorganic material; a laminate obtained by laminating a permeable thin film made of these inorganic materials can be used. In addition, the bright material-containing coating film described in JP-A-2003-294622 and JP-A-2002-114940 may be used as the reflective layer.

In one embodiment, the reflective layer is at least one selected from the group consisting of a thin film of aluminum (aluminum foil), a metal vapor deposition film, plating, a glitter material-containing coating film, and a metal substrate.

The number of reflective layers in the multi-layer structure of the pigment may be one layer or two or more layers. In one embodiment, when there are two or more reflective layers, the entire surface of the two layers, which is the outermost layer of the multilayer structure, is not a reflective layer. In another embodiment, when there are two reflective layers, the layer located between the two reflective layers is an adhesive layer described later.

-Second polarizing layer The function of the second polarizing layer; the material; the type of polarized light transmitted through; the type of the polarizing layer; and the thickness are as described in the above-mentioned polarizing layer.

In one embodiment, the second polarizing layer is at least one selected from the group consisting of a linear polarizing layer, a circular polarizing layer and an elliptically polarizing layer. In another embodiment, the second polarizing layer is a linear polarizing layer. In yet another embodiment, the first polarizing layer and the second polarizing layer are at least one selected from the group consisting of a linear polarizing layer, a circular polarizing layer, and an elliptically polarizing layer. In yet another embodiment, the first polarizing layer and the second polarizing layer are linearly polarized layers.

In one embodiment, the second polarizing layer is at least one selected from the group consisting of a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer. In another embodiment, the second polarizing layer is a dichroic dye-based polarizing layer. In yet another embodiment, the first polarizing layer and the second polarizing layer are at least one selected from the group consisting of a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer. In yet another embodiment, the first polarizing layer and the second polarizing layer are dichroic dye-based polarizing layers.

The transmission axis of the second polarizing layer may or may not be orthogonal to the transmission axis of the first polarizing layer. In one embodiment, the transmission axis of the second polarizing layer is orthogonal to the transmission axis of the first polarizing layer.

-Adhesive layer The adhesive layer is a layer having a function of adhering one or two layers adjacent to the adhesive layer. Examples of the adhesive layer include a photosensitive adhesive (UV curable adhesive) and a pressure sensitive adhesive. Examples of the material of the adhesive layer include a thermoplastic resin, an acrylic resin, and a silicone resin. In addition, for example, the adhesive resin and the adhesive resin described in JP-A-2014-197163 can be mentioned.

The adhesive layer may or may not transmit light having wavelengths in other regions (for example, infrared rays and ultraviolet rays) as long as it can transmit at least a part of visible light.

The thickness of the adhesive layer is not particularly limited, and is, for example, 0.001 to 2 mm, preferably 0.01 to 1 mm, and more preferably 0.05 to 0.5 mm. In one embodiment, the thickness of the adhesive layer is 0.05 mm or more, 0.1 mm or more, 0.2 mm or more, 0.3 mm or more, 0.4 mm or more, or 0.5 mm or more. In another embodiment, the thickness of the adhesive layer is 0.5 mm or less, 0.4 mm or less, 0.3 mm or less, 0.2 mm or less, 0.1 mm or less or 0.05 mm or less.

The multilayer structure of the pigment of the present invention may include a polarizing layer and a birefringent layer in this order, and the shape is not limited. For example, the multilayer structure may be a laminated structure (for example, the multilayer structure 10 in FIG. 1), a spherical shape (for example, the multilayer structure 11 in FIG. 7), a substantially spherical shape, an ellipsoidal shape, a cubic shape, or a rectangular parallelepiped shape (for example, a rectangular parallelepiped structure). For example, it may have a multilayer structure 11) in FIG. 8 and a cylindrical core-shell structure.

The number of layers of the multi-layer structure of the pigment of the present invention is at least two because it includes a polarizing layer and a birefringent layer. The number of layers of the multilayer structure may be two layers, three layers, four layers, five layers, six layers, seven layers, eight layers, nine layers or ten layers.

-Other layers The pigment of the present invention may contain layers other than the above-mentioned layers inside or outside the multilayer structure. Examples of such other layers include the surface treatment layer and the surface tension adjusting layer described in International Publication No. 2018/034261.

FIG. 9 is a schematic view showing a cross section of another example of the pigment according to the present invention. In the example of this pigment 1, the pigment 1 includes a surface treatment layer 60 that covers the periphery of the multilayer structure 10.

FIG. 10 is a schematic view showing a cross section of another example of the pigment according to the present invention. In the example of the pigment 1, the pigment 1 includes a surface treatment layer 60 that covers the periphery of the multilayer structure 10, and a surface tension adjusting layer 70 that covers the periphery of the surface treatment layer 60.

The pigment of the present invention may contain one or more layers selected from the group consisting of a surface treatment layer and a surface tension adjusting layer in at least a part around the multilayer structure.

As the surface treatment layer and the surface tension adjusting layer, for example, those described in International Publication No. 2018/034261 can be used.

The surface treatment layer may cover at least a part of the periphery of the multilayer structure (for example, side surface; one surface other than the side surface; two surfaces other than the side surface), or may cover the entire periphery of the multilayer structure. The thickness of the surface treatment layer is, for example, 0.5 to 15 nm, preferably 1 to 10 nm.

The surface tension adjusting layer may cover at least a part (for example, side surface; one surface other than the side surface; two surfaces other than the side surface) around the multilayer structure or the surface treatment layer, or may cover the periphery of the multilayer structure or the surface treatment layer. It may cover the whole. The thickness of the surface tension adjusting layer is, for example, 0.1 to 10 nm, preferably 0.1 to 5 nm.

In one embodiment, the multilayer structure of the pigment is, in order, a two-layer structure of a polarizing layer and a birefringent layer, and a laminated structure. In another embodiment, the multilayer structure of the pigment is, in order, a three-layer structure of a first polarizing layer, a birefringent layer, and a second polarizing layer. In yet another embodiment, the multilayer structure of the pigment is, in order, a three-layer structure of a polarizing layer, a birefringent layer, and a reflective layer. In yet another embodiment, the multilayer structure of the pigment, in turn, comprises a polarizing layer (first polarizing layer), a birefringent layer, and a reflective layer or a second polarizing layer, where the reflective layer is present. The birefringent layer is a λ / 2 birefringent layer. In yet another embodiment, the multilayer structure of the pigment is, in order, a three-layer structure of a polarizing layer, an adhesive layer, and a birefringent layer. In yet another embodiment, the multilayer structure of the pigment is, in order, a five-layer structure of a first polarizing layer, an adhesive layer, a birefringent layer, an adhesive layer, and a second polarizing layer. In yet another embodiment, the multilayer structure of the pigment is, in order, a five-layer structure of a polarizing layer, an adhesive layer, a birefringent layer, an adhesive layer, and a reflective layer. In yet another embodiment, the multilayer structure of the pigment, in turn, comprises a polarizing layer, an adhesive layer, a birefringent layer, an adhesive layer and a reflective layer, and the birefringent layer is a λ / 2 birefringent layer. In yet another embodiment, the multilayer structure of the pigment is, in order, a two-layer structure of a polarizing layer and a birefringent layer, and a spherical, substantially spherical or ellipsoidal core-shell structure. In yet another embodiment, the multilayer structure of the pigment is, in order, a two-layer structure of a polarizing layer and a birefringent layer, and a rectangular parallelepiped or cubic core-shell structure.

The shape of the pigment of the present invention is not particularly limited, and examples thereof include a laminated body shape or a flat plate shape; a spherical shape; a substantially spherical shape; an ellipsoidal shape; a cubic shape; a rectangular parallelepiped shape; a prismatic shape; a columnar shape; and an indefinite shape. .. In one embodiment, the shape of the pigment of the present invention is at least one selected from the group consisting of flat plate, spherical and substantially spherical.

The dimensions of the pigment of the present invention may be appropriately adjusted according to, for example, a desired appearance. For example, in the case of flat pigments, the dimensions of the long sides are 0.1 μm to 3 cm; the thickness is 0.6 μm to 6 mm. For example, in the case of a spherical pigment, the average particle size is 0.6 μm to 6 mm. In the present specification, the average particle size means the volume average particle size (D50) of the pigment-dispersed particles. The average particle size can be measured using, for example, a laser diffraction type particle size distribution measuring device manufactured by Shimadzu Corporation, a particle size measuring device such as the trade name “SALD-2200”.

The pigment of the present invention may be used alone or in combination of two or more.

-Method for producing a pigment The method for producing a pigment is not particularly limited as long as it can be produced so as to include a multilayer structure including a polarizing layer and a birefringent layer in this order, and a known method for producing a laminate such as an optical film can be used.

Examples of the method for producing a pigment include the following processes:
A) Apply a UV curable adhesive on one surface of the cellophane film as a birefringent layer;
B) A polarizing film as a polarizing layer is laminated on the applied UV-curable adhesive;
C) Irradiate UV from the polarizing layer side or the birefringent layer side to cure the UV curable adhesive to form an adhesive layer;
D) The laminate obtained from the above c) is cut or crushed to a desired size.
By the steps a) to d), the pigment shown in FIG. 4 is obtained.

As a method for producing a pigment, for example, the following steps e), f) and g) may be further performed after the steps a) to c) above and before the step d). ..
E) After step (c) above, apply a UV curable adhesive on the other surface (the surface without the adhesive layer) of the cellophane film;
F) A polarizing film as a second polarizing layer is laminated on the UV curable adhesive applied in step e) above;
F) UV is irradiated from the second polarizing layer side or the first polarizing layer side to cure the UV curable adhesive to form an adhesive layer. These steps give the pigment shown in FIG.

The method for pulverizing the pigment is not particularly limited, and for example, the pulverization method described in International Publication No. 2018/034261 can be used.

Examples of the target to which the pigment is blended include compositions (paint compositions, cosmetic compositions, decorative compositions, etc.), fibers, and the like, which will be described later.

(Composition)
The composition according to the present invention is a composition containing any of the above pigments. The pigment contained in the composition may be only one kind or a combination of two or more kinds.

The amount of the pigment in the composition is, for example, 1 to 99 parts by mass, preferably 20 to 80 parts by mass, and more preferably 30 to 70 parts by mass with respect to 100 parts by mass of the solid content of the composition. .. In one embodiment, the amount of the pigment of the present invention is 30 parts by mass or more, 40 parts by mass or more, 50 parts by mass or more, 60 parts by mass or more, or 70 parts by mass or more with respect to 100 parts by mass of the solid content of the composition. be. In another embodiment, the amount of the pigment of the present invention is 70 parts by mass or less, 60 parts by mass or less, 50 parts by mass or less, 40 parts by mass or less, or 30 parts by mass or less with respect to 100 parts by mass of the solid content of the composition. Is.

The composition according to the present invention may contain other components in addition to the pigment, for example, depending on the use of the composition, coatability, and the like. The other components may be used alone or in combination of two or more. Other components include, for example, resins as coating film forming elements, solvents, dispersants, defoamers, sagging inhibitors, viscosity regulators, sedimentation inhibitors, cross-linking accelerators, curing agents, leveling agents, surface conditioning agents. , Defoamers, plastics, preservatives, antifungal agents, UV stabilizers, pH regulators, metal ion blockers, antioxidants, anti-inflammatory agents, whitening agents, activators, water-soluble polymers, oil-soluble polymers , Rows, alcohols (higher alcohols), chemicals, clay minerals, fragrances and the like. In addition, the composition may contain known pigments (for example, extender pigments and coloring pigments) other than the pigments according to the present invention.

Examples of the resin include acrylic resin, polyester resin, alkyd resin, fluororesin, epoxy resin, polyurethane resin, and polyether resin. Further, as the resin, for example, a polymer compound containing an inorganic component or composed of an inorganic component, such as a silicone resin or an alkoxysilane condensate, can be used. In addition, a resin as a known coating film forming element used in a coating composition or the like may be used.

The amount of the resin in the composition is, for example, 1 to 99 parts by mass, preferably 20 to 80 parts by mass, and more preferably 30 to 70 parts by mass with respect to 100 parts by mass of the solid content of the composition. .. In one embodiment, the amount of resin is 30 parts by mass or more, 40 parts by mass or more, 50 parts by mass or more, 60 parts by mass or more, or 70 parts by mass or more with respect to 100 parts by mass of the solid content of the composition. In another embodiment, the amount of resin is 70 parts by mass or less, 60 parts by mass or less, 50 parts by mass or less, 40 parts by mass or less, or 30 parts by mass or less with respect to 100 parts by mass of the solid content of the composition.

As the solvent, a solvent such as a conventionally known coating composition and a cosmetic composition can be appropriately selected and used. For example, alcohols such as methanol, ethanol, 2-propanol and 1-butanol; ethyl acetate, butyl acetate, isobutyl acetate, ethyl propionate, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate and the like. Ethers; ethers such as diethyl ether, propylene glycol monomethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, dioxane, tetrahydrofuran (THF); ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3- Glycols such as butylene glycol, pentamethylene glycol, 1,3-octylene glycol; formamide, N-methylformamide, dimethylformamide (DMF), dimethylacetamide, dimethylsulfoxide (DMSO), N-methylpyrrolidone (NMP) Amidos such as: acetone, methyl ethyl ketone (MEK), methyl propyl ketone, methyl isobutyl ketone, acetyl acetone, cyclohexanone and other ketones; toluene, xylene, mesityrene, dodecylbenzene and other aromatic hydrocarbons; chloroform, dichloromethylene and other halogens. Examples include system solvents.

The amount of the solvent in the composition may be appropriately adjusted in consideration of coatability, viscosity and the like.

-Method for preparing the composition The method for preparing the composition is not particularly limited, and the pigment according to the present invention and other arbitrary components such as a resin and a solvent can be mixed and produced using a known mixing device or the like. can. When the composition is a coating composition, the pigment according to the present invention can be added to a known coating composition (base coating) and mixed to prepare a coating composition.

The use of the composition is not particularly limited, and it can be suitably used for applications requiring high designability or cosmeticity. Applications of the composition include, for example, paint compositions, cosmetic compositions, decorative compositions and the like.

In one embodiment of the composition according to the present invention, the composition is a coating composition.

In one embodiment of the composition according to the present invention, the composition is a cosmetic composition or a decorative composition.
The compositions according to the invention may be applied or rubbed on humans; and non-human animals.

(Article)
The article according to the present invention is an article having a coating film using any of the above compositions.

Articles having a coating film using the composition are not particularly limited, and vehicles such as automobiles, trains, buses, and taxis; vehicle tires; ships; aircraft such as airplanes and helicopters; , Office buildings, public facilities, commercial facilities, research facilities, military facilities, walls of buildings such as tunnels, floors, ceilings, roofs, pillars, signs, electronic signage (digital signage), doors, gates; bridges Vending machines; Road signs; Signals; Street lights; Digital signage such as LED, liquid crystal, and light bulbs; Work machines, construction machines; Stone monuments; Tombstones; Clothing; Footwear such as shoes; Rain gear such as umbrellas and kappa; Packaging Materials: Lenses such as glasses; Mirrors and the like.

The film thickness of the coating film is not particularly limited and may be adjusted as appropriate. For example, it is 0.6 μm to 6 mm, preferably 20 μm to 2 mm, and more preferably 50 μm to 1 mm. In one embodiment, the film thickness of the coating film is 50 μm or more, 100 μm or more, 200 μm or more, 300 μm or more, 400 μm or more, 500 μm or more, 600 μm or more, 700 μm or more, 800 μm or more, 900 μm or more or 1 mm or more. In another embodiment, the film thickness of the coating film is 1 mm or less, 900 μm or less, 800 μm or less, 700 μm or less, 600 μm or less, 500 μm or less, 400 μm or less, 300 μm or less, 200 μm or less, 100 μm or less or 50 μm or less.

The method for forming the coating film is not particularly limited, and a conventionally known coating method can be used. For example, coating can be performed using an applicator, a bar coater, a brush, a spray, a roller, a roll coater, a curtain coater, or the like. Alternatively, it can be painted by immersing it in a paint bath.

The drying temperature after applying the coating composition may be appropriately adjusted according to the solvent and the like. For example, when drying in a short time such as 10 seconds to 30 minutes is required, the temperature can be 30 to 200 ° C, preferably 40 to 160 ° C. When drying in a short time is required, an energy ray such as a two-component curing reaction or ultraviolet rays may be used. If it is not necessary to dry in a short time, it may be dried at room temperature, for example.

Hereinafter, the present invention will be described in more detail with reference to examples, but these examples are for the purpose of exemplifying the present invention and do not limit the present invention in any way.

The materials used in the examples are as follows.
<Polarizing layer>
Polarizing film: Trade name "SKN-18243T" (absorbent polarizing film) manufactured by Polatechno Co., Ltd., thickness 215 μm
<Birefringence layer>
Cellophane film: Product name "monochromatic cellophane (transparent)" manufactured by Toyo Co., Ltd., thickness approx. 0.02 mm
<UV curable adhesive>
Product name "Permbond UV605" manufactured by Permabond
<Base paint>
Aqueous acrylic emulsion: Product name "Boncoat CF-2800" manufactured by DIC, NV = 50%
<Non-birefringent material>
Axial stretch polypropylene film: Trade name "AZ-881" manufactured by Sekisei Co., Ltd., clear envelope, thickness 60 μm

・ Example 1
A UV curable adhesive was applied onto a cellophane film (dimensions 10 cm × 10 cm) as a birefringent layer. Next, a polarizing film as a polarizing layer was placed on the UV curable adhesive. UV was irradiated from the polarizing film side to cure the UV curable adhesive to form an adhesive layer. The obtained laminate having a three-layer structure of a polarizing layer, an adhesive layer and a birefringent layer was mechanically crushed using a rotary crusher to obtain a pigment. The obtained pigment had dimensions of 2 mm × 2 mm and a thickness of 350 μm.

Next, 100 parts by mass of the obtained pigment was added to 100 parts by mass of the solid content of the aqueous acrylic emulsion, and the mixture was stirred and mixed to obtain a composition (paint composition).

The obtained composition was coated on a glass plate. Then, the composition was dried at room temperature for 1 hour to form a coating film (thickness 900 μm), and a glass plate having the coating film was obtained. When the obtained coating film was observed under indoor illumination light at different angles, it was confirmed that the color of the coating film changed and the coating film exhibited high design.

-Example 2
The process up to the production of the three-layer structure laminate of Example 1 was carried out in the same manner. Next, a UV curable adhesive was applied on the surface of the birefringent layer opposite to the adhesive layer. Next, a polarizing film as a second polarizing layer was placed on the UV curable adhesive. At this time, the angle between the first polarizing layer and the second polarizing layer was set to 90 °. UV was irradiated from the second polarizing layer side to cure the UV curable adhesive to form an adhesive layer. The obtained laminate having a five-layer structure of a first polarizing layer, an adhesive layer, a birefringent layer, an adhesive layer and a second polarizing layer was mechanically pulverized using a rotary crusher to obtain a pigment. The obtained pigment had dimensions of 2 mm × 2 mm and a thickness of 700 μm.

Next, a composition (paint composition) was prepared in the same manner as in Example 1. Further, as in Example 1, a glass plate having a coating film was obtained. When the obtained coating film was observed under indoor illumination light at different angles, it was confirmed that the color of the coating film changed and the coating film exhibited high design.

・ Comparative example 1
Polarized light in the same manner as in Example 1 except that a non-birefringent material (a material having no birefringence), a non-axially stretched polypropylene (CPP) film, was used instead of the birefringent layer in Example 1. A laminate having a three-layer structure consisting of a layer, an adhesive layer and a CPP film layer was obtained. The laminate was mechanically crushed using a rotary crusher to obtain a pigment. The obtained pigment had dimensions of 2 mm × 2 mm and a thickness of 380 μm.

Then, a comparative composition (comparative coating composition) was prepared in the same manner as in Example 1. Further, as in Example 1, a glass plate having a coating film was obtained. The obtained coating film was observed at different angles under indoor illumination light, but the color of the coating film did not change.

According to the present invention, it is possible to provide a pigment that is cheaper and can exhibit high designability or cosmeticity. According to the present invention, it is possible to provide a composition containing such a pigment. According to the present invention, it is possible to provide an article having a high degree of design.

1: Pigment 10, 11: Multilayer structure 20: Polarizing layer (first polarizing layer)
21: Second polarizing layer 30: Birefringent layer 40: Reflective layer 50: Adhesive layer 60: Surface treatment layer 70: Surface tension adjusting layer

Claims (6)

A pigment containing a multi-layer structure
The multilayer structure, in order,
Polarizing layer and
Pigments, including with a birefringent layer. The multi-layer structure, in order
With the polarizing layer (first polarizing layer),
With the birefringent layer
The pigment according to claim 1, which comprises a reflective layer or a second polarizing layer. A composition comprising the pigment according to claim 1 or 2. The composition according to claim 3, wherein the composition is a coating composition. The composition according to claim 3, wherein the composition is a cosmetic composition or a decorative composition. An article having a coating film using the composition according to any one of claims 3 to 5.

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