JP5944076B1 - Colored flaky fine powder-containing dispersion and metallic gel or metallic paint using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colored scaly fine powder which can be used without any problem as a raw material of a coating material which can obtain a leafing effect without being excessively restricted by a solvent to be used and as a raw material of a colored paint exhibiting a metallic luster Dispersions and coating materials and gels obtained using the dispersions are provided. SOLUTION: A lamination step of laminating a release layer and a metal layer on the surface of a base film to obtain a laminate, and a peeling step of peeling the metal layer from the laminate using a solvent; The metal layer is pulverized in the solvent to obtain a flaky fine powder, and a pulverizing step for obtaining a flaky fine powder dispersion and the flaky fine powder contained in the flaky fine powder dispersion are colored. A scaly fine powder-containing dispersion characterized by being obtained through a coloring step and a leafing treatment step of adding a leafing agent to the scaly fine powder-containing dispersion after finishing the coloring step. . [Selection] Figure 1

Description

  The present invention relates to a dispersion containing a colored scaly fine powder as a raw material of a paint using a color pigment exhibiting high luminance, and a metallic gel or a metallic paint using the dispersion.

  Nowadays, as a part of makeup, manicure (also called “nail color” or “nail polish”) has been widely used to paint your nails, but now it ’s simple to apply. In addition, the so-called nail fashion and nail art (hereinafter simply referred to as “nails”) are also widely applied to their nails.

  Such fashion has a long history. For example, it is known that manicure already existed in ancient Egypt, Greece, and Rome, but in the modern age, paints (color / polish) for manicure and There are a wide variety of materials that can present complex expressions in nail gels, and the manicure and nail actions have been sublimated to the level of decoration with an artistic feel.

  In such manicures and nails, where a variety of expressions are required as described above, glossy is one of the properties that has always attracted attention and has been widely demanded since ancient times. There is a viewpoint of improvement.

  The glossiness of nail polish and nail is literally the appearance of gloss (metal luster) reminiscent of metal after the nail polish or nail is painted on the nail. Conventionally, various ingenuity has been applied to obtain such effects. Although it has been applied to gels for use (hereinafter, simply referred to as “gel nails”), it is generally used simply by mixing nail polish or raw materials of gel nails with metal powder.

  However, simply adding metal powder to nail polish and gel nails, even though they are materials for expressing so-called lame shapes, it is still possible to obtain a uniform and smooth metallic luster on the entire painted surface. It was difficult, and further ingenuity was needed for manicure and gel nails.

  Therefore, in order to obtain a material capable of obtaining a smoother metallic luster, for example, an invention as described in Patent Document 1 has been proposed.

Special table 2009-502839

  The invention disclosed in Patent Document 1 is characterized by using a leafing agent. According to the present invention, the surface of the coating layer obtained by applying a cosmetic composition (manicure or gel nail) containing a metal powder to which a leafing agent is directly bonded or adhered (hereinafter simply referred to as “bonded”), if necessary. The effect is that the metal powder with the leafing agent bonded to the side floats and accumulates.

  The leafing agent shown in the present invention and the leafing effect obtained thereby are briefly described as follows.

  When a conventional metal powder is contained alone in a cosmetic composition, the metal powder will naturally settle or disperse in the cosmetic composition. First, the leafing agent is bonded to the metal powder, and the metal powder in the state is floated in the cosmetic composition. When the cosmetic composition in that state is applied to, for example, nails, The powder is in a floating state, and as a result, a metallic luster is exhibited on the coated surface. Such an effect exhibited on the metal powder is referred to as a leafing effect, and a material capable of obtaining such an effect is referred to as a leafing agent. As described above, Patent Document 1 is characterized in that a phosphate ester is used as a leafing agent for obtaining such a leafing effect.

  Further examination on the use of phosphate ester as a leafing agent reveals that the metal powder used in cosmetics is aluminum powder as specifically described in Patent Document 1, and is used as a solvent contained in the cosmetic composition. If ketones and acetates are used, the leafing effect is surely exhibited. However, it cannot always be sure whether the equivalent leafing effect can be reliably obtained with other combinations.

  This is thought to be because the leafing agent is a phosphate ester, and at the same time ketone and acetate are used as solvents. That is, although the surface tension of phosphate ester is actually high to some extent, it is considered that the leafing effect described in Patent Document 1 can be obtained because the surface tension of the solvent used at the same time is higher than that, When the solvent was other than that, the certainty of whether or not an equivalent effect could be obtained was low. This is thought to be due to the fact that there are few suitable solvents that can be used in cosmetic compositions other than ketones and acetates as solvents having a surface tension higher than that of phosphate esters. It was.

  That is, in order to reliably obtain the leafing effect described in Patent Document 1, it is necessary to always use a solvent having a surface tension higher than that of a phosphate ester, but such a suitable solvent cannot be obtained easily. In the light of the fact that it is difficult to obtain, it can be said that it was a problem. In other words, when it is intended to realize a cosmetic using the invention of Patent Document 1, it is actually the case that a considerable limitation can be imposed on the type of solvent that is actually selected, and it is widely used for a wide variety of solvents. It can be said that it is difficult to do, and this is a problem.

  The explanation so far was based on the technical background of use as cosmetics, but even if the application is further expanded from the concept of cosmetic paints and gels, for example, the surface of steel bridges, steel towers, etc. It can be understood that the same can be said for the case of considering a paint intended for painting. In other words, if it is used for a small area such as a nail, even if the leafing effect is limited, it is acceptable, but it is desirable to exert the leafing effect almost evenly on the vast surface of a huge structure such as a steel bridge or a steel tower. In such a scene, the fact that the type of solvent used for the coating material is considerably limited is considered to cause a great problem in terms of actual usability.

  In addition to the above problems, the following problem arises when trying to use the invention described in Patent Document 1 in order to obtain a colored glitter paint.

  Obtaining the leafing effect means that the fine particles that have been leafed on the surface side in a substantially side view of the coating layer are accumulated as described above, but when the coating layer is viewed as a plane in that state, the fine particles It was in a state where only the color of was visible.

  That is, if the fine particles are, for example, aluminum, the silver color exhibited by aluminum can be visually recognized on the surface of the coating layer, but when trying to obtain a colored paint exhibiting metallic luster using the invention described in Patent Document 1, Even if the paint in which the metal powder is mixed is made to have a desired color, for example, blue, since the fine powder of aluminum accumulates on the surface side in the applied coating layer, the surface of the coating layer, that is, the coating surface is blue in the end. The phenomenon that it is rarely exhibited occurs. In short, there is a high possibility that aluminum will have a silver lid on the surface in the coating layer, and the essential blue color will not be visible from the surface.

  In other words, when the invention described in Patent Document 1 is used for cosmetics, only the colors of the fine particles contained therein can inevitably be used, that is, the colors that can be used are limited. Even if the fine particles described in (1) are used in cosmetics, it must be said that they are unsuitable for seeking a wide range of expressions, and this is also a problem.

  In addition, although the explanation so far was based on the technical background assuming the use as cosmetics, even if the application is further expanded from the concept of cosmetic paints and gels, It can be seen that the same can be said for the case of considering a paint assuming surface coating. In other words, even if you want to perform a colored coating with a metallic feeling on a specific giant surface, you can apply an effective colored metallic coating that can be fully recognized by simply adding metallic powder to the colored paint. The problem of not being possible occurred.

  The present invention has been made in view of such problems, and its purpose is to provide a coating material obtained with a leafing effect that is more concise and reliable, without being excessively limited by the solvent used. It is to provide a colored scaly fine powder dispersion that can be used as a raw material and as a raw material for a colored paint exhibiting metallic luster without any problems, and a coating material or gel obtained by using the colored scaly fine powder dispersion.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is a laminate in which a release layer and a metal layer are laminated on the surface of a base film that is a polymer resin film. A laminar fine powder obtained by laminating the metal layer from the laminate, peeling the metal layer from the laminate using a solvent, and pulverizing the metal layer in the solvent. A pulverizing step for obtaining a dispersion, a coloring step for coloring the flaky fine powder contained in the flaky fine powder dispersion, and a leafing agent added to the flaky fine powder-containing dispersion after finishing the coloring step And a leafing treatment step, wherein the thickness of the metal layer is 5 nm or more and 100 nm or less, and is an average value of the longest end-to-end length on the surface of the scaly fine powder. The average major axis is 1 μm or more, The ratio of the major axis and the thickness, i.e. the aspect ratio represented by the average major axis / thickness is 10 or more, the coloring means in the coloring step, the flaky fine powder dispersion, a silane coupling agent, an organic pigment And is added in this order .

The invention according to claim 2 of the present invention is a laminate in which a release layer containing a leafing agent having a leafing function and a metal layer are laminated on the surface of a base film that is a polymer resin film. A laminating step for obtaining a body, a peeling step in which the metal layer is peeled from the laminate using a solvent, and a scaly fine powder obtained by pulverizing the metal layer in the solvent to obtain a scaly fine powder. A pulverizing step for obtaining a powder dispersion and a coloring step for coloring the flaky fine powder contained in the flaky fine powder dispersion, wherein the thickness of the metal layer is 5 nm or more. The average major axis which is 100 nm or less and the average value of the length of the longest end to end in the surface of the flaky fine powder is 1 μm or more, and the ratio of the average major axis to the thickness, that is, the average major axis / thickness Aspect ratio shown is 10 or more Lying, coloring means in said coloring step, the flaky fine powder dispersion, a silane coupling agent, obtained by adding an organic pigment, in this order, it is a means that features a.

Invention of Claim 3 of this invention is a manufacturing method of the flaky fine powder containing dispersion liquid of Claim 1 or Claim 2, Comprising: The said organic pigment is a soluble azo lake pigment, It is characterized by the above-mentioned. To do.

The invention described in claim 4 of the present invention is a method of manufacturing a flaky fine powder-containing dispersion according to any one of claims 1 to 3, wherein the leafing agent, silicone or modified silicone It is characterized by using.

Invention of Claim 5 of this invention is a manufacturing method of the flaky fine powder containing dispersion liquid of any one of Claim 1 thru | or 4 , Comprising: The said release layer is cellulose acetate butyrate. (CAB), and the solvent is butyl acetate.

The method for producing a scaly fine powder-containing gel / paint according to claim 6 of the present invention is completed by the method for producing a scaly fine powder-containing dispersion according to any one of claims 1 to 5 . After that, a substitution step of substituting the solvent with a monomer so that the content of the solvent in the obtained scaly fine powder-containing dispersion is 5 wt% or less, and then a polymerization initiator and an oligomer are added and mixed. Performing the adding step.

  As described above, if the flaky fine powder-containing dispersion according to the present invention (hereinafter also simply referred to as “dispersion”), the flaky fine powder contained in the dispersion is subjected to a leafing treatment. Therefore, when this dispersion is used as a coating material, when the coating material is applied, the scaly fine powder contained in the coating material floats on the surface side of the coating layer and gathers. A metallic luster is obtained on the surface of the resulting coating layer. In addition, since each metal powder is a scaly fine powder, it is possible to easily obtain a coated surface in which the metallic luster is further improved as compared with the case where the metal powder is finely granular. In other words, the surface when the fine particles are continuous is in a state where the irregularities derived from the particles are intensely present, and when the entire surface is observed, the surface is not substantially flat, whereas the surface when the flaky fine powder is continuous is scaled. Since the surfaces are continuous or folded, when the entire surface is observed, the surface is substantially flat, and a smooth metallic luster can be obtained.

  Further, by using silicone or modified silicone as the material for the leafing treatment, the choice of solvent used in the dispersion becomes wide. That is, in the conventional product, the type of solvent that can be used to obtain an effective leafing effect is considerably limited. If the dispersion according to the present invention is used, the type of solvent used in the dispersion is as high as that of the conventional one. Are not subject to strict restrictions, i.e., the choice of solvents is widened, and as a result, the types of paints that can be used with dispersions are also widened.

  Further, when a nail polish or gel nail using this dispersion is used, a coated surface exhibiting a smooth metallic luster that is aesthetically superior to conventional ones can be obtained simply by applying them to the nails. If this dispersion is used as a coating material for building materials, it is possible to easily provide a substantially uniform metallic gloss layer over the entire surface of the coated surface even for a wide area.

  And above all, since the flaky fine powder is directly colored, if the dispersion according to the present invention is used, a desired colored metallic luster can be easily obtained without intentionally coloring the dispersion separately. In addition, the scale-like fine powder in the dispersion according to the present invention has a pigment more firmly bonded to the scale-like fine powder colored by the conventional method. “Color fading” is less likely to occur, that is, a state with good color retention can be easily obtained.

It is a flowchart figure which shows the manufacturing method of the gel nail using the dispersion liquid obtained by this invention.

  Embodiments of the present invention will be described below. The embodiment shown here is merely an example, and is not necessarily limited to this embodiment.

(Embodiment 1)
A scaly fine powder dispersion (dispersion) according to the present invention will be described as a first embodiment.

The dispersion according to the present embodiment is obtained as follows.
First, a lamination step of laminating a release layer and a metal layer on the surface of a base film that is a polymer resin film to obtain a laminate, and peeling by peeling the metal layer from the laminate using a solvent A step of pulverizing the metal layer in a solvent to obtain a flaky fine powder, obtaining a flaky fine powder dispersion, and coloring the flaky fine powder contained in the flaky fine powder dispersion And a leafing treatment step of adding a leafing agent to the flaky fine powder dispersion.

  In the dispersion according to the present embodiment, the thickness of the metal layer constituting the scaly fine powder contained therein is 5 nm or more and 100 nm or less, and the length of the longest end to end in the surface of the scaly fine powder is The average major axis, which is an average value, is 1 μm or more, and the ratio of the average major axis to the thickness, that is, the aspect ratio represented by the average major axis / thickness is 10 or more.

Hereinafter, description will be made in order.
The base film used for producing the dispersion according to the present embodiment will be described.
This base film may be widely used when forming a laminate called a so-called laminated film, and there is no particular limitation here, but it is made not to break in each step described later. In view of this, a suitable base film may be used.

  For example, it can be said that a polyethylene terephthalate (PET) film is suitable for use in the present embodiment, and that a polyethylene naphthalate (PEN) or polycarbonate (PC) film is also suitable. In this embodiment, a PET film is used. Similarly, the thickness of the base film is preferably such that it does not break in each step described below. For example, if a PET film is used, the film has a thickness of 10 μm or more and 100 μm or less. Should be used. The thickness of the PET film used in this embodiment is assumed to be 12 μm.

  Next, a release layer is laminated on the surface of the base film made of PET film. The release layer in this embodiment uses a polymer resin such as cellulose acetate butyrate resin (CAB) for the reason described later. Can be said to be suitable. In this embodiment, CAB is used.

  A conventionally known so-called wet coating method such as a gravure coating method may be used as a method for laminating the release layer on the base film. In this embodiment, the gravure coating method is used. In the present embodiment, the concentration when CAB used as a release layer is actually used in this step is preferably 0.5 wt% or more and 1.0 wt% or less. If the concentration is too low, a necessary layer is not formed in the first place, and if the concentration is too high, the release property is not exhibited. Therefore, the above range is preferable.

  And it is preferable that the thickness of the release layer laminated | stacked in this way is 30 nm or more and 70 nm or less. In this embodiment, it is 50 nm.

Next, the metal layer laminated on the surface of the release layer will be described.
This metal layer is a layer exhibiting metallic luster and may be laminated using, for example, a metal or a metal oxide.

  The material selected as the metal layer in the present embodiment may be anything as long as it exhibits a metallic luster if necessary. For example, it is used as a material for manicure or gel nail as described later. For example, aluminum can be said to be a suitable material. It can be said that it is suitable in terms of cost, and that it is easy to exhibit the leafing effect described later by using aluminum having the characteristic of amphoteric metal. Of course, any other material that exhibits a metallic luster may be used, but in the present embodiment, the description will be continued on the assumption that aluminum is used.

  This metal layer may be laminated by a so-called conventionally known dry coating technique, such as sputtering or vacuum deposition. If aluminum used in this embodiment is stacked, for example, a vacuum evaporation method is preferable. There are no particular restrictions on the conditions for the vapor deposition, and conventionally known conditions may be used.

  The thickness of the laminated metal layer is preferably 10 nm or more and 100 nm or less depending on the purpose described later. That is, it is an important object of the present embodiment to impart a leafing effect to this metal layer. However, if this thickness exceeds 100 nm, the weight of the scaly fine powder increases even if the leafing effect is imparted. Therefore, it is considered that it is difficult to obtain the leafing effect, and if it is less than 10 nm, the metal gloss that is the original purpose cannot be sufficiently obtained because the thickness is too thin even if suitable from the viewpoint of obtaining the leafing effect. Therefore, it is preferable that the thickness is 10 nm or more and 100 nm or less. More preferably, the thickness is 25 nm or more and 75 nm or less, but the thickness of the metal layer made of aluminum used in this embodiment is 35 nm.

  A laminated body is obtained through a laminating process in which the respective materials described above are laminated. In the present embodiment, this laminate has a configuration of PET film / CAB / Al.

  Next, a peeling step in which the metal layer is peeled from the laminate using a solvent, and a grinding step to obtain a scaly fine powder dispersion by crushing the metal layer in a solvent to obtain a scaly fine powder. And will be explained.

First, the peeling process will be described.
At this process, the laminated body laminated | stacked on the surface of a base film is peeled by immersing the laminated body containing a metal layer for a specific solvent. The specific solvent used in this case is, of course, a solvent that can easily dissolve the release layer. For example, butyl acetate can be used as an example of this embodiment and to dissolve the CAB used. Should be used.

  The release layer is dissolved by immersing the laminate in butyl acetate, and at that time, the interlayer adhesion between the metal layer and the base film becomes extremely weak.

  Next, a doctor blade is applied to the surface of the laminate immersed in butyl acetate, and the metal layer laminated on the surface is scraped off. At this time, since the release layer by CAB is in a so-called “blown” state by being immersed in butyl acetate as described above, the metal layer can be easily peeled off from the base film simply by scratching with a doctor blade. It is done. When the peeling operation is completed, the base film is extracted. At this point, the peeled metal layer is present in butyl acetate.

  The doctor blade used here is not particularly limited, and a commonly used one may be used.

  Next, the finely pulverizing step in which the laminate scraped from the base film by the doctor blade in the peeling step, that is, here the aluminum layer is finely pulverized will be described.

  The specific method of pulverization in the present embodiment may be a conventionally known method as long as it is a wet pulverization method, for example, a method of pulverization using an ultrasonic homogenizer, or coarse pulverization. It is conceivable to use a high-pressure homogenizer after finely pulverizing with a homomixer, but any method may be used as long as it is a wet pulverization method.

In this way, the scaly fine powder-containing dispersion according to the present embodiment is obtained.
As the name of the scaly fine powder present in the obtained dispersion liquid, each fine powder is shaped like a fish scaly. That is, it is not “grain” but extremely “flat”. In general, it can be said that all the “fine powders” are “flaky”, but of course, when each “flaky fine powder appearance” is taken out, their appearances are different. The thickness is almost the same. This is because all the scaly fine powder is obtained by finely crushing the metal layer, that is, the thickness of the scaly fine powder is the same as the thickness of the metal layer.

  And the average major axis which is the average value of the longest end-to-end length in the surface of the scaly fine powder according to the present embodiment is 1 μm or more, and is represented by the ratio of the average major axis to the thickness, that is, the average major axis / thickness. The aspect ratio is 10 or more. Until the numerical value is satisfied, the pulverization step in the present embodiment is executed.

Here, the relationship between the average major axis and the aspect ratio will be described.
For example, if the thickness of the scaly fine powder is 100 nm, the aspect ratio is 10 when the average major axis is 1 μm. On the other hand, when using mica or sericite, which is a pigment having a shape that can also be referred to as a plate-like fine powder, having an appearance similar to the shape like the scale-like fine powder according to the present embodiment, It has been empirically determined that when the aspect ratio of these mica and sericite is less than 10, the “slip feeling” is not suitable. When this feeling of slipping is good, it is also known from experience that it has a very smooth appearance when viewed with the human eye. Therefore, it is necessary to set the aspect ratio of the flaky fine powder to 10 or more in order to give smoothness to the metallic luster exhibited by the flaky fine powder according to the present embodiment as described later. As a result, the average major axis is 1 μm or more.

  Next, at the stage where the pulverization step described above is completed, a coloring step for coloring the flaky fine powder contained in the flaky fine powder dispersion is performed. This coloring process will be described.

  The coloring step performed here is intended to color the scaly fine powder, and specifically, embodies a state in which the pigment is chemically bonded directly to the scaly fine powder.

  In order to explain this process, an organic pigment is used as a pigment for coloring aluminum which is a flaky fine powder.

  The organic pigment literally refers to a pigment containing an organic compound as a component, and it may be further classified into an azo pigment and a polycyclic pigment based on its chemical structure. The polycyclic pigment refers to a condensed ring compound having a function as a pigment, for example, a phthalocyanine pigment. On the other hand, the azo pigment refers to an azo compound that has a double bond between nitrogen atoms and has a function as a pigment.

  Here, the description will be continued on the assumption that an azo pigment is used as an organic pigment, but a rake pigment that is obtained by ionizing a water-soluble dye among azo pigments and electrically binding a metal ion as a carrier, That is, the description will be continued assuming a soluble azo lake pigment. The soluble azo lake pigment is a pigment in which an azo pigment, which is a water-soluble dye, is laked to make it insoluble.

  In this coloring step, first, a silane coupling agent is added to the scaly fine powder dispersion, and the silane coupling agent is chemically bonded to the aluminum surface. The organic functional group of the silane coupling agent is not particularly limited. For example, the silane coupling agent has one or a plurality of organic functional groups such as an epoxy group, an amino group, or an isocyanate group. Here, the silane having an epoxy group is used. A coupling agent is used.

  As described above, the dispersion is in a state in which a fine powder of aluminum is contained in a solvent containing a small amount of CAB. The silane coupling agent to be added is preferably 0.2% by weight to 2.0% by weight, and more preferably 0.5% by weight to 1.5% by weight, based on the solid content of the pigment. When the concentration is 0.2% by weight or less, the amount of the silane coupling agent that binds to the aluminum surface decreases, and therefore, sufficient binding strength with the organic pigment cannot be obtained. On the other hand, if the amount exceeds 2.0% by weight, there will be a large amount of excess silane coupling agent that does not bind to the aluminum surface. As a result, the excess silane coupling agent produced when the pigment is added to the dispersion is the surface of the organic pigment. First, it is adsorbed first, which inhibits the bonding with the organic group on the aluminum surface, resulting in a phenomenon that the coloring power is reduced as a result. Therefore, it is preferable to be within the above-mentioned range.

  By passing through this operation, the silane coupling agent is fixed to the surface of aluminum, which is a scaly fine powder scattered in the dispersion.

  An organic pigment is added to the dispersion in this state. This organic pigment is previously dispersed in butyl acetate, but no dispersant is used in this case. The reason for using butyl acetate is that the organic pigment has appropriate compatibility for bonding with the organic group on the aluminum surface. In this state, hydrophilic groups such as hydroxyl groups and carboxyl groups remain in the soluble azo lake pigment in the pigment dispersion in which the soluble azo lake pigment is dispersed in butyl acetate. Reacts with the organic group of the silane coupling agent and bonds strongly.

  That is, a silane coupling agent is first bonded to the surface of aluminum which is a flaky fine powder, and the silane coupling agent and an organic pigment are bonded, resulting in a state in which the organic pigment is bonded to the surface of aluminum, That is, the scaly fine powder of aluminum is colored.

  At this time, for example, it is possible to try to bond the organic pigment directly to the surface of the scaly fine powder without using a silane coupling agent. However, in this case, the adhesion of the pigment to the flaky fine powder surface is likely to change depending on the polarity of the solvent, etc., or the adhesion is still weak. It has been found that there is a problem that the pigment easily peels off, that is, the color fading occurs even when using such a state, and the pigment is applied to the surface of the scaly fine powder to cope with such a problem. A method of coating the surface of the bonded state with a resin composition has also been proposed, but there has been a problem that the particle becomes thick due to the resin coating and the metallic luster is lowered.

  Therefore, as in this embodiment, if it is a method of binding the scaly fine powder surface and the organic pigment via a silane coupling agent, the bond becomes strong, that is, the color fading hardly occurs. This makes it possible to obtain a paint.

  As described above, the dispersion according to the present embodiment is obtained, and the scaly fine powder present in the dispersion is in a state colored with an organic pigment. A little more detail about the fine powder.

  The shape and the like are as described above. For example, when the state in which this scaly fine powder is applied to a certain surface by some method is observed from the side, the shape of each fine powder is scaly. As a result, a film of scaly fine powder is formed on the surface of the substrate in a substantially side view. That is, a “surface” is formed by scaly fine powder. However, the surface referred to here is not necessarily a dense surface having no gap, and may be a surface having a gap depending on the application state and content.

  On the other hand, for example, if each fine powder has a grain shape, even if they are similarly applied to a certain surface, the surface of the coating layer is formed with an uneven surface derived from the grain shape in a substantially side view, That is, the smooth surface obtained by scaly is not formed.

  When these are compared, in the case of scaly, a “surface” is formed, so that the surface is not so uneven, and when viewed from the top, it becomes a surface that gives a smooth impression, but this is not a scaly but a grain If it is a diameter, the above-described surface is not formed, and the grains are arranged side by side, so that irregularities due to the particles are clearly generated. That is, the present invention aims at obtaining a smooth metallic luster on the surface to which the coating material is finally applied, so that the scaly fine powder obtained in the present embodiment exhibits a great effect.

  Moreover, since each scale-like fine powder is colored with an organic pigment, it can be made very suitable as a material for a paint exhibiting a so-called metallic color.

  In this embodiment, a leafing agent is added to the dispersion containing the flaky fine powder exhibiting such characteristics, thereby providing a leafing effect on the flaky fine powder derived from the metal layer in the laminate. Giving.

This leafing will be explained.
First, the state without adding a leafing agent, that is, the state of the scale-like fine powder-containing dispersion obtained through the laminating step and the peeling step described above can be referred to as a non-leafing type. Use liquid.

  In the non-leafing type dispersion, the flaky fine powder literally freely disperses in the liquid. Therefore, when a coating material using this is applied to an arbitrary surface, the scale is contained in the coating layer formed by coating. The fine powder is temporarily dispersed and arranged. That is, when this is closely observed, a certain flaky fine powder is located near the surface of the applied layer, while another flaky fine powder sinks near the lower surface of the layer. It is in a state that exists randomly, that things also exist.

  Of course, a specific visual effect can be obtained even in this state, so that the non-leafing type dispersion may be left as it is depending on the method of use.

  However, it is not easy to obtain a smooth metallic luster all over because the scale-like fine powder due to the metal layer contained therein is uniformly dispersed in the coating layer as a non-leafing type dispersion. .

  Therefore, in this embodiment, a leafing effect is obtained by adding a leafing agent in order to remove such a harmful effect.

This leafing effect will be described in comparison with the non-leafing type described above.
As described above, when a coating layer is formed by a coating material using a non-leafing type dispersion, the scaly fine powder contained in a substantially side view is uniformly dispersed. On the other hand, when a leafing treatment (hereinafter also referred to as a leafing type) is used, the scaly fine powder contained in a substantially side view is floated and arranged in the vicinity of the surface of the coating layer. That is, the scaly fine powder is “floated”. Processing to exhibit such an effect is referred to as a leafing process, and such an effect is referred to as a leafing effect.

  In order to impart such a leafing effect to the scaly fine powder, in the present embodiment, the following treatment is applied to the scaly fine powder.

  First, a leafing agent for exhibiting a leafing effect is added to the dispersion obtained by the above-described steps. Then, the leafing agent added to the dispersion is adsorbed to the scaly fine powder in the dispersion. As a result, the scale-like fine powder adsorbed by the leafing agent exhibits a phenomenon that the surface tension originally possessed is lowered. If the expression is changed, it can be said that the leafing agent is a material that can reduce the surface tension inherent in the scaly fine powder by adsorbing the leafing agent to the scaly fine powder.

  And when the flaky powder with reduced surface tension is dispersed in a solvent with high surface tension, the flaky powder with reduced surface tension floats on the surface of the coating film as a result of the leafing treatment. Occurs.

  That is, when a paint using a dispersion liquid containing scale-like fine powder that has been subjected to leafing treatment is applied, the contained scale-like fine powder floats on the surface of the coating layer, and they are arranged. Since the fine powder is scaly, as described above, the scaly fine powder exhibiting a metallic luster is arranged on the coating surface, and as a result, a smooth metallic luster is exhibited on the coating surface. It will be done.

Continue to explain further.
What is used for the metal layer to be said to be the raw material of the scaly fine powder to be subjected to the leafing treatment is not particularly limited as long as it exhibits a metallic luster, but in this embodiment, aluminum is used. As we have already said, Further explanation will focus on the use of this aluminum. Since aluminum is an amphoteric metal, it has the property of easily adsorbing both acids and bases, which limits the materials that can be used as a leafing agent. It can be said that it is relatively wide. Therefore, in this embodiment, reactive silicone is used as the leafing agent.

  The silicone-based leafing agent is one in which an organic functional group is attached to the side chain or terminal of dimethylsiloxane (silicone), and it is more preferable to use one having a carboxylic acid in the side chain. And this carboxylic acid will adsorb | suck to the aluminum which comprises a scaly fine powder, and it will be in the state by which the surface of aluminum was coat | covered with dimethylsiloxane. That is, silicone is attached to aluminum, and as a result, the surface tension inherent to aluminum, which is a flaky fine powder, is significantly reduced, and it tends to exist at the interface between air and solvent. As a result, when a paint obtained from a dispersion containing aluminum-like flaky powder with silicone adhered thereto is applied, the aluminum-like flaky powder with silicone adhered to the surface of the coating layer, resulting in a metal derived from aluminum. Gloss is exhibited on the surface of the coating layer.

  As the leafing agent, it is theoretically possible to use, for example, a phosphate ester in addition to the silicone type. However, if this is a long-chain phosphate ester, it may adhere to aluminum. There may be a phenomenon that the surface tension does not decrease so much, that is, the leafing effect is hardly obtained effectively. In addition, in order to obtain high luminance by the leafing effect, there is a problem that the solvent to be used is considerably limited.

  In other words, the leafing effect is not sufficiently obtained means that the surface tension of the scaly fine powder is not reduced so much, and in order to float such scaly fine powder on the coating surface, This means that the effect cannot be exerted unless the surface tension of the solvent is very high. In other words, such a solvent must be selected intentionally, and as a result, the choices of the solvent are considerably limited, making it easy to use. However, only dispersions that are not necessarily good were obtained.

  However, if the silicone-based leafing agent according to the present embodiment is used, the leafing effect obtained thereby is very large, so the selection of the solvent is not so limited, that is, a very convenient one. It can be said that it can be obtained.

It is as follows when the above is put together, assuming the dispersion liquid which concerns on this Embodiment.
When the scale-like fine powder contained in the dispersion is a non-leafing type, that is, when aluminum scale-like fine powder is simply present in the solvent, in the coating layer obtained by painting with a paint using this The flaky fine powder of aluminum is in a state of being randomly dispersed in the coating layer. That is, the orientation is not preferable, and the mirror surface property in the coating film cannot be obtained.

  On the other hand, when the flaky fine powder contained in the dispersion is a leafing type, that is, the flaky aluminum powder is present in the solvent, and the aluminum flaky fine powder is subjected to a leafing treatment with a silicone-based leafing agent. In the coating layer obtained by painting with a paint using this, the surface tension of the aluminum scaly fine powder subjected to the leafing treatment is reduced, which is the surface tension. When dispersed in a monomer having a high molecular weight, they float on the surface and are arranged on the surface, and as a result, a mirror finish in the coating film can be obtained.

  As described above, the scale-like fine powder-containing dispersion subjected to the leafing treatment according to the present embodiment can be obtained. Various paints can be obtained by using this dispersion liquid, and the leaf-like fine powder having a metallic luster that has been subjected to the leafing treatment contained in those paints is applied with the paint obtained by the dispersion liquid containing it. Since it floats on the surface of the coating layer, a smooth metallic luster can be obtained on the coating surface.

(Embodiment 2)
In the scaly fine powder-containing dispersion that has been subjected to the leafing treatment according to the first embodiment described above, the leafing treatment was performed by adding a leafing agent after obtaining the scaly fine powder dispersion. However, in the present embodiment, the dispersion liquid in which the leafing process is completed when the dispersion liquid is obtained will be described.

  In the second embodiment, the method for obtaining the dispersion is basically the same as in the first embodiment, and detailed description thereof will be omitted. However, the release layer in the present embodiment exhibits the leafing effect. Since the point which uses the material which has is different from the mold release layer in 1st Embodiment, it demonstrates below regarding this.

  As described above, it is preferable to use a silicone-based leafing agent as a leafing agent for effectively exhibiting the leafing effect. However, in the second embodiment, a silicone-based leafing agent is added to the release layer from the beginning. Use materials to contain. For example, dimethylsiloxane (silicone) having an organic functional group at the side chain or terminal, and particularly having a side chain having a carboxylic acid is included in the release layer material.

  By setting it as such a release layer, in the step of dissolving the release layer when releasing the laminated portion from the laminate, the released release layer exhibits a leafing effect, which is combined with the metal layer. Therefore, the leafing agent addition work in the first embodiment becomes unnecessary.

  By doing so, it is finally possible to obtain a dispersion liquid equivalent to that of the first embodiment. In this embodiment, the dispersion liquid having the target leafing effect is obtained in the first embodiment. It can be easily obtained with fewer steps than the form.

  When this procedure is used, the leafing treatment is completed before the coloring step. As a result, the leafing treatment is performed at the same time that the organic pigment is bonded to the surface of the scaly fine powder. It is the same in that it is in a state of being in a state, and it should be noted that the effect is unchanged.

(Embodiment 3)
Next, a method for producing a gel nail using the dispersion obtained in the first embodiment or the second embodiment will be described as a third embodiment with reference to FIG.

  The gel nail obtained by this production method uses the dispersion obtained by the production method described in the previous embodiment as a raw material for the gel nail. A smooth metallic luster can be obtained.

  The dispersion used in the present embodiment is a colored scale-like fine powder-containing dispersion obtained by the production method described in the first embodiment, that is, the scale-like fine powder is made of aluminum. It is assumed that a soluble azo lake pigment is used as the pigment to be bonded to the resin, a silane coupling agent having an epoxy group is used as the binder, and butyl acetate is used as the solvent.

  First, a colored scale-like fine powder-containing dispersion is obtained. Since this is obtained by the process as already described, its detailed description is omitted.

  Next, a silicone leafing agent is added as a leafing agent to the obtained dispersion.

  The ratio of the leafing agent to be added is desirably 0.2 wt% to 1.5 wt%, and more desirably 0.5 wt% to 1.0 wt% with respect to the dispersion. If the amount is less than 0.2 wt%, the amount of the coating due to the leafing agent is small so that a sufficient leafing effect cannot be obtained. If the amount exceeds 1.5 wt%, the leafing agent is excessively present on the surface of the dispersion. As a result, leafing of the scaly fine powder is hindered. Therefore, it is preferable to be within the above range.

  When the silicone leafing agent is added to the scaly fine powder-containing dispersion, the mixture is stirred at room temperature for 1 hour or more. The stirring method is not particularly limited and may be performed by a conventionally known method.

When stirring is completed, the supernatant liquid is removed by centrifugation, and then the acrylate monomer is added thereto, and stirring is performed again. Here, by adding the acrylate monomer, the solvent is replaced from butyl acetate to the acrylate monomer. The amount of the acrylate monomer to be added may be an amount such that when the solvent is replaced and the dispersion liquid is gel as described later, the amount of butyl acetate is a residual amount that does not affect the curing of the gel. If a large amount of butyl acetate remains in the gel when the gel is cured, there arises a problem that even if the gel is applied, the coating film does not cure or the curability deteriorates. Specifically, when the final content of butyl acetate is 5 wt% or less, the gel curing time and the characteristics of the coated film after curing are not particularly affected.

By repeating this step 2 to 3 times, a scaly fine powder dispersion in which the solvent is replaced with an acrylate monomer is obtained.

Next, after adding a photopolymerization initiator (trade name: Irgacure 819 and Lucillin TPO / both BASF) as a reaction initiator to the obtained monomer-substituted scale-like fine powder-containing dispersion, the mixture is stirred for 1 hour or more. Dissolve the initiator.

  As a result, a monomer-dispersed colored scaly fine powder-containing liquid to which a reaction initiator is added is obtained.

  Next, the obtained monomer-dispersed colored scaly fine powder-containing liquid and a urethane acrylate oligomer are mixed. In this embodiment, three types of urethane acrylate oligomers (trade names UN-2700 / UN-3320HC / UN-2301 / all manufactured by Negami Kogyo Co., Ltd.) are used.

When the urethane acrylate oligomer is mixed, the mixture is stirred at 60 ° C. to thoroughly mix the whole.

  In this way, a gel nail based on the colored flaky fine powder dispersion is produced.

  As explained at the beginning of the present embodiment, the obtained gel nail can obtain a smooth metallic metallic metallic luster on the surface of the coating layer simply by applying it to the nails.

  As described above, the gel nail has been described in the present embodiment, but it is also conceivable to use this dispersion as a raw material for nail polish from the viewpoint of nail decoration. However, the manufacture of nail polish is basically obtained by a manufacturing method substantially the same as described above, and therefore detailed description thereof is omitted here.

  It should be noted that, in the same way as described above, but by changing various conditions as a design matter, it may be possible to obtain a manufacturing method for obtaining a paint instead of a gel. In other words, the “gel” assumed in the production method of the present invention is intended for use on nails, but when the object to be coated is a general base material such as metal or plastic, it is “gel”. It is common to call it "paint" instead of "." That is, whether it is gel or paint, it is merely a change in design matters. In short, the manufacturing method according to the third embodiment can be obtained regardless of whether gel or paint is assumed. Since the coated surfaces are the same, the detailed description when the coating material is assumed is omitted, and it is simply noted that in the present invention, it is simply referred to as “a method for producing a scaly fine powder-containing gel / paint”.

In order to further illustrate the present invention, the following examples are given.
First, a dispersion is obtained by the following procedure.
・ Base film PET film Thickness 12μm
・ Release layer Raw material CAB
→ Lamination method / Layer thickness 50nm
・ Metal layer Aluminum → Lamination method / Layer thickness 35nm

-Lamination A coating solution in which CAB is dissolved in butyl acetate is applied to the surface of the PET film by a gravure coating method and dried to obtain a release layer. Then, a metal layer is laminated | stacked by vacuum evaporation (high frequency induction heating), and a laminated body is obtained.

-Peeling and grinding The metal layer is sprayed with butyl acetate to dissolve the release layer. That is, the metal layer is detached from the PET film. Next, the detached metal layer is scraped off with a doctor blade to obtain a dispersion containing a metal film having a thickness of 35 nm in butyl acetate. Next, this is repeated using a homomixer and a fine pulverizer until the major axis of the scaly particles reaches a predetermined value.

-Aspect ratio 290 / average major axis 10 μm of the obtained scaly fine powder
-Solid content of the flaky fine powder in the obtained dispersion 10 wt%

-Silane coupling agent treated with silane coupling agent on aluminum surface (3-glycidoxypropyltriethoxysilane (trade name: Shin-Etsu Silicone, KBE-403)) having 1.0 wt% of aluminum solid content The mixture was added and mixed at room temperature for 24 hours to bond the silane coupling agent to the aluminum surface.

・ The specific method for adding organic pigment is as follows.
The organic pigment was added to butyl acetate so as to have a solid content concentration of 2.0 wt%, and the dispersion operation was performed by ultrasonic irradiation in an ultrasonic bath. In order to efficiently combine the organic pigment and the organic group of the silane coupling agent on the aluminum surface, this dispersing operation was performed without using a dispersing agent for dispersing the organic pigment. As an example, red 202 was used as the organic pigment.
The organic pigment dispersion that had been dispersed was added to the scaly aluminum dispersion having the silane coupling agent bonded to the surface, and the mixture was stirred for 1 hour or more to bind the organic group and the organic pigment on the aluminum surface. As a result, a colored flaky aluminum pigment obtained by coating flaky aluminum with an organic pigment was obtained.

-Leafing of colored flaky aluminum Add 1.0% by weight of leafing agent (carboxyl-modified modified silicone oil (X-22-3701E, manufactured by Shin-Etsu Chemical Co., Ltd.)) to the colored flaky aluminum pigment. Stir for 1 hour or more.

It was confirmed how the state of pigment adsorption changes depending on whether the aluminum surface is treated with a silane coupling agent.
<Example 1>
Using the method described above, a colored flaky aluminum pigment is produced by binding an organic pigment to the flaky aluminum surface. No leafing process.
<Example 2>
Leafing treatment for colored scale-like aluminum pigments.
<Comparative Example 1>
Uses scaly aluminum pigments that do not have a silane coupling agent bonded to the aluminum surface. (The organic pigment dispersion is added to the scale-like aluminum dispersion that has just been peeled and crushed and stirred)
No leafing treatment <Comparative Example 2>
A leafing process was performed on Comparative Example 1.

  A metallic gel is applied to an area of 40 mm × 100 mm on an acrylic substrate having a thickness of 2 mm by using a 100 μm applicator. Using a commercially available UV lamp for 18W gel nail, the coating was cured by light irradiation for 1 minute. The appearance of the coated surface was visually evaluated.

  The above results are shown in the table.

  As can be seen from the table, in Example 1, the entire surface of the scaly aluminum is covered with an organic pigment, which is a colored scaly aluminum pigment, whereas in Comparative Example 1, there is little pigment coating, and the scaly aluminum is It is not colored but is simply a mixture of scaly aluminum and organic pigment. In Example 2, the specularity of the coated surface is improved by leafing the colored scaly aluminum, and the appearance color of the coated surface is pink metallic. On the other hand, in Comparative Example 2, since the pigment is not attached to the scaly aluminum, as a result of the leafing of only the aluminum, the appearance color is silver (the color of the pigment is hidden by the aluminum and cannot be seen) although the specularity of the coated surface is high. State).

Thus, it can be seen that the use of the dispersion according to the present invention makes it possible to obtain a suitable specularity of the coated surface without causing color separation.

  In the case of the flaky fine powder-containing dispersion according to the present invention, since the flaky fine powder contained therein exhibits a metallic luster and is subjected to a leafing treatment, this is used as a paint. By using it as a coating material and applying it, the scaly fine powder exhibiting metallic luster naturally floats on the surface of the coating layer, so that it is easy to obtain metallic luster on the coated surface. Therefore, a metal film can be easily provided on the surface by coating such a coating material on the surface of a large-scale building, for example. Further, when this is used as a material for nail polish or gel nail, it is possible to easily obtain a beautiful metallic luster simply by applying these coating materials to the nails. Since the fine powder forming the metallic luster is scaly, it is easy to accumulate the fine powder as if it is a film on one side. Diffuse reflection due to surface irregularities is less likely to occur, that is, a smooth metallic luster can be obtained.

  Furthermore, in the case of the dispersion containing scale-like fine powder according to the present invention, the scale-like fine powder contained in the dispersion is in a state of being coated with an organic pigment. Color can be easily obtained.

Claims (6)

A laminating step of laminating a release layer and a metal layer on the surface of a base film that is a polymer resin film to obtain a laminate;
A peeling step formed by peeling the metal layer from the laminate using a solvent;
Crushing the metal layer in the solvent to obtain a scaly fine powder dispersion,
A coloring step of coloring the scaly fine powder contained in the scaly fine powder dispersion;
A leafing treatment step of adding a leafing agent to the scaly fine powder-containing dispersion after the coloring step;
It is obtained through
The metal layer has a thickness of 5 nm to 100 nm,
An average major axis which is an average value of lengths from end to end on the surface of the scaly fine powder is 1 μm or more,
The ratio of the average major axis to the thickness, that is, the aspect ratio represented by the average major axis / thickness is 10 or more,
Coloring means in the coloring step,
A means of adding a silane coupling agent and an organic pigment in this order to the scaly fine powder dispersion;
A method for producing a dispersion containing a leaf-like flaky fine powder comprising: A lamination step of laminating a release layer containing a leafing agent having a leafing function on a surface of a base film that is a polymer resin film and a metal layer to obtain a laminate;
A peeling step formed by peeling the metal layer from the laminate using a solvent;
A pulverization step of obtaining a flaky fine powder dispersion in which the metal layer is pulverized in the solvent to form a flaky fine powder;
A coloring step of coloring the scaly fine powder contained in the scaly fine powder dispersion;
It is obtained through
The metal layer has a thickness of 5 nm to 100 nm,
An average major axis which is an average value of lengths from end to end on the surface of the scaly fine powder is 1 μm or more,
The ratio of the average major axis to the thickness, that is, the aspect ratio represented by the average major axis / thickness is 10 or more,
Coloring means in the coloring step,
A means of adding a silane coupling agent and an organic pigment in this order to the scaly fine powder dispersion;
A method for producing a dispersion containing a leaf-like flaky fine powder comprising: It is a manufacturing method of the scaly fine powder containing dispersion liquid according to claim 1 or 2,
The organic pigment is a soluble azo lake pigment,
A method for producing a dispersion containing a leaf-like flaky fine powder comprising: It is a manufacturing method of the scaly fine powder containing dispersion liquid according to any one of claims 1 to 3,
The leafing agent is one using silicone or modified silicone,
A method for producing a dispersion containing a scaly fine powder. It is a manufacturing method of the scale-like fine powder containing dispersion liquid of any one of Claims 1 thru | or 4, Comprising:
The release layer is made of cellulose acetate butyrate (CAB),
The solvent is butyl acetate,
A method for producing a dispersion containing a scaly fine powder. After the method for producing a flaky fine powder-containing dispersion according to any one of claims 1 to 5 is completed,
A substitution step of substituting the solvent with the monomer so that the content of the solvent in the obtained scaly fine powder-containing dispersion is 5 wt% or less;
Thereafter, an addition step of adding and mixing the polymerization initiator and the oligomer is performed,
A method for producing a scaly fine powder-containing gel / paint using a scaly fine powder-containing dispersion.

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