KR102672917B1 - Cosmetic composition comprising color changeable capsule - Google Patents

Abstract

The present invention relates to a cosmetic composition including a color variable capsule, and more specifically, to a cosmetic composition including a color variable capsule whose color and tone vary depending on the intensity and polarity of magnetism.

Description

Cosmetic composition comprising a color variable capsule. {COSMETIC COMPOSITION COMPRISING COLOR CHANGEABLE CAPSULE}

The present invention relates to a cosmetic composition including a color variable capsule, and more specifically, to a cosmetic composition including a color variable capsule whose color and tone vary depending on the intensity and polarity of magnetism.

In general, to produce color cosmetics, various dyes and pigments are added to achieve the desired color. In color cosmetics, most desired colors can be realized through the development of various dyes or pigments, but as these are products that only produce one color, they cannot produce a color variable effect that realizes various colors.

As for cosmetics that exhibit a color variable effect, for example, in Korean Patent Publication No. 10-2012-0131621, the shelf life of the cosmetic can be set by controlling the time when the unique color of the natural pigment contained in the cosmetic composition changes. It allows consumers to visually check the expiration date of cosmetics. However, this prior art does not allow the color to change and return to the original color, but only causes color change over time.

In other words, most of the color variable materials being developed must be accompanied by changes in pH or temperature, and there are various restrictions on their direct application to cosmetics, which limits their application fields.

Republic of Korea Patent Publication No. 10-2012-0131621

The present invention was developed in consideration of the above-described prior art, and by applying a capsule capable of changing color by magnetism, various colors and tones can be realized depending on the intensity and magnetic pole of the applied magnet without changing acidity or temperature. The purpose is to provide a cosmetic composition.

The cosmetic composition of the present invention for solving the above problems is characterized by including microcapsules whose color can be changed by magnetism.

In one embodiment, the microcapsule may include one or more types of magnetic particles.

In another embodiment, the microcapsule may include two or more types of particles.

In another embodiment, the microcapsule may include magnetic particles and non-magnetic particles, and by varying the colors of the two types of particles, various colors can be realized as the position of the magnetic particles changes depending on the intensity of magnetism.

In another embodiment, the microcapsule may include first magnetic particles, second magnetic particles, and non-magnetic particles, and the colors of the three types of particles are all different, so that the first magnetic particles have different magnetization values depending on the intensity of magnetism. And, various colors can be realized by changing the position of the second magnetic particle.

In another embodiment, the initial color of the microcapsule may be adjusted by the ratio of two or more types of particles contained within the microcapsule.

In another embodiment, the microcapsule may include Janus magnetic particles.

At this time, one particle of the Janus magnetic particle may be divided into different polarities.

Additionally, one particle of the Janus magnetic particle can be divided into two different colors.

Additionally, the Janus magnetic particles may have any one of the following shapes: spherical, rod-shaped, disk-shaped, polygonal, and multiple spheres.

Additionally, the color of the microcapsule may change depending on the pole of the magnetic material accessed from the outside.

Additionally, the color of the microcapsule may change depending on the direction and angle of the magnetic material approaching from the outside.

The cosmetic composition according to the present invention can provide a cosmetic composition that can implement various colors and tones depending on the intensity and magnetic pole of the applied magnet without changing acidity or temperature by applying a capsule capable of changing color by magnetism.

Figure 1 is a conceptual diagram showing the principle of operation of the color variable capsule of the present invention, showing an example of operation of a microcapsule containing two types of particles (a) and an example of operation of a microcapsule containing Janus magnetic particles (b). .
Figure 2 is a conceptual diagram showing the driving of microcapsules containing colored magnetic particles and white non-magnetic particles by a magnetic field.
Figure 3 is a conceptual diagram showing the driving of microcapsules containing colored magnetic particles and colored non-magnetic particles by a magnetic field.
Figure 4 is a conceptual diagram showing the driving of a microcapsule containing two types of magnetic particles and non-magnetic particles by a magnetic field.
Figure 5 is a conceptual diagram showing the driving of a microcapsule containing Janus magnetic particles by a magnetic field.
Figure 6 is a conceptual diagram showing the driving of a microcapsule containing Janus magnetic particles according to the angle and direction of the magnetic field.
Figure 7 is an exemplary diagram illustrating various forms of Janus magnetic particles.
Figure 8 is a conceptual diagram showing the effect of changing the color of cosmetics using a cosmetic composition containing microcapsules of the present invention.
Figure 9 is an optical micrograph (a) of a microcapsule according to the present invention and a photograph (b) showing the color changing effect when an external magnetic material is approached after applying a cosmetic composition containing the microcapsule to a film.

Hereinafter, the present invention will be described in detail.

The cosmetic composition according to the present invention is characterized by comprising microcapsules whose color can be changed by magnetism.

The microcapsule is a material that causes a color change effect using photonic crystal technology, and is a microcapsule containing nanoparticles, color nanoparticles, color nanocomposites, etc., particles that react to a magnetic field and an organic solvent in which the particles are dispersed. It consists of media.

The color nanocomposite can be realized through the unique color of the particles due to the colorant particles contained in the nanocomposite, and at the same time, the nanocomposite is rearranged or the charge state is changed by applying an electric field or magnetic field from the outside to make a specific color. Colors can also be realized by transmitting or reflecting light of different wavelengths. In other words, the color nanocomposite must have a very uniform particle size in order to realize color through rearrangement of particles or change in charge state and must have characteristics that facilitate rearrangement due to high mobility in the medium.

The nanoparticles, colored nanoparticles, or colored nanocomposites may be dispersed in a medium, or may exist dispersed in a medium in the form of charged particles, and may be composed of a core-cell structure or a multi-core-cell structure. For this dispersion, the magnetic color variable pigment preferably has a uniform particle size in the range of 50 to 1,000 nm, preferably 100 to 500 nm, and more preferably 100 to 300 nm. However, when the particles contain a colorant, the uniformity of the particles may be a more important factor than the particle size, so the particle size may be outside the range.

Additionally, the nanoparticles may be conductive particles, metal particles, organic metal particles, metal oxide particles, magnetic particles, or hydrophobic organic polymer particles, and may be photonic crystals in which regularity is given to the arrangement and spacing of particles by the application of external energy. It may be a particle that exhibits a characteristic. For example, silicon (Si), titanium (Ti), barium (Ba), strontium (Sr), iron (Fe), nickel (Ni), cobalt (Co), lead (Pb), aluminum (Al), copper. It may be made of one or more metals including (Cu), silver (Ag), gold (Au), tungsten (W), molybdenum (Mo), zinc (Zn), and zirconium (Zr), or their nitrides or oxides. .

In addition, organic nanoparticles may be made of polymer materials such as polystyrene, polyethylene, polypropylene, polyvinyl chloride, and polyethylene terephthalate, and may be particles whose surface is modified by an organic compound having a hydrocarbon group, a carboxyl group, an ester group, or an organic compound. Particles whose surface has been modified by an organic compound having one or more of the following groups, particles whose surface has been modified by a complex compound containing a halogen element, particles whose surface has been modified by a coordination compound containing an amine, thiol, or phosphine. Examples include particles that have an electric charge by forming radicals on their surfaces.

Additionally, the nanoparticles may be particles imparted with electrical polarization properties. In other words, as an external magnetic field or electric field is applied for polarization with the medium, polarization of ions or atoms is additionally induced, greatly increasing the amount of polarization, and even when an external magnetic or electric field is not applied, the residual polarization amount exists and the magnetic or electric field is applied. It may contain a ferroelectric material that leaves hysteresis depending on the direction, and when an external magnetic or electric field is applied, ion or atomic polarization is additionally induced, greatly increasing the amount of polarization, but when an external magnetic or electric field is not applied. In this case, it may include a paraelectric material or a superparaelectric material that leaves no residual polarization and hysteresis.

Such materials may include materials having a perovskite structure. In other words, examples of materials with an ABO ₃ structure include PbZrO ₃ , PbTiO ₃ , Pb(Zr,Ti)O ₃ , SrTiO ₃ , BaTiO ₃ , (Ba, Sr)TiO ₃ , CaTiO ₃ , and LiNbO _{3 .} You can.

Additionally, the nanoparticles may be composed of particles containing single or different metals, oxide particles, or photonic crystalline particles.

In the case of metals, metal nitrate-based compounds, metal sulfate-based compounds, metal fluoroacetoacetate-based compounds, metal halide-based compounds, metal perchlorate-based compounds, metal sulfamate-based compounds, metal stearate-based compounds, and organometallic compounds. Magnetic precursors selected from the group consisting of alkyltrimethylammonium halide-based cationic ligands, neutral ligands such as alkyl acid, trialkylphosphine, trialkylphosphine oxide, alkylamine, alkylthiol, sodium alkyl sulfate, and sodium alkyl carboxylate. , an amorphous metal gel can be prepared by adding and dissolving a ligand selected from the group consisting of anionic ligands such as sodium alkyl phosphate and sodium acetate in a solvent, and heating the gel to transform it into crystalline particles.

At this time, by containing different types of precursor materials, the magnetic properties of the final particles can be enhanced, or various magnetic materials such as superparamagnetic, paramagnetic, ferromagnetic, antiferromagnetic, ferrimagnetic, and diamagnetic materials can be obtained.

The nanoparticles, colored nanoparticles, or colored nanocomposites are dispersed in a medium within the microcapsule and then rearranged by application of an electric or magnetic field. The medium may be a polar or non-polar medium. For example, water, methanol, ethanol, propanol, butanol, propylene carbonate, toluene, benzene, hexane, chloroform, halocarbon oil, perchlorethylene, trichloroethylene, isopar-G, isopar-M, a type of isoparaffin oil. , isopar-H, or any one or more of them can be used.

Additionally, the magnetic color variable ink may include a material that becomes magnetic, that is, magnetized, when a magnetic field is applied. In addition, in order to prevent magnetic particles from agglomerating when an external magnetic field is not applied, magnetization occurs when an external magnetic field is applied, but when an external magnetic field is not applied, remnant magnetization occurs. It is also possible to use materials that do not exhibit superparamagnetic properties.

In addition, in order to ensure that the nanoparticles are well dispersed in the solvent and do not aggregate, the particle surface can be coated with a charge of the same sign, and in order to prevent the particles from settling in the solvent, the particle surface can be coated with a material that has a different specific gravity from the corresponding particle. You can also coat it or mix a solvent with a substance that has a different specific gravity from the particle in question.

Additionally, the nanoparticles can be configured to reflect light of a specific wavelength, that is, to have a specific color. More specifically, the particles according to the present invention can have a specific color through adjustment of oxidation number or coating with inorganic pigments, pigments, etc. For example, inorganic pigments coated on particles according to the present invention include Zn, Pb, Ti, Cd, Fe, As, Co, Mg, Al, etc. containing chromophores, and may be used in the form of oxides, emulsions, and sulfates. , dyes coated on the particles according to the present invention may include fluorescent dyes, acid dyes, basic dyes, mordant dyes, sulfurized dyes, vat dyes, disperse dyes, reactive dyes, etc.

Additionally, the nanoparticles may be coated with a charged material so that they have the same charge.

The microcapsules contain photonic crystals or a solvent in which photonic crystals with unique colors are dispersed. At this time, the microcapsules are aginate, gelatin, ethyl cellulose, polyamide, melamine formaldehyde resin, and poly(vinyl pyridine). By constructing the capsule wall with a transparent polymer of at least one of polystyrene, a resin containing urethane bonds, and polymethyl methacrylate, the photonic crystals can be rearranged by the application of a magnetic field to realize color. It becomes possible.

Such microcapsules include the microcapsules disclosed in Korean Patent Publication No. 10-2017-0124028 developed by the applicant, or those disclosed in Korean Patent Publication Nos. 10-2015-0031197, 10-2015-0017796, and 10-2015-0020491. All of the disclosed microcapsules can be used, and can be applied to both electrophoresis and magnetic field application methods, allowing them to respond to electromagnetic fields applied from the outside.

The cosmetic composition according to the present invention can achieve various types of color changing effects by containing the above microcapsules.

That is, the microcapsule may include one or more types of magnetic particles, and may also include two or more types of particles. In this case, the microcapsule may contain two or more types of particles of different colors. When an external magnetic material is approached and a magnetic field is applied, the positions of the particles change, thereby creating a color variable effect.

Figure 1 is a conceptual diagram showing the principle of operation of the color variable capsule of the present invention. As shown in Figure 1 (a), a microcapsule in which one type of magnetic particle and one type of non-magnetic particle are mixed is in a mixed state before applying a magnetic field. As the strength of the magnetic field becomes stronger, the degree of localization of the magnetic particles increases and a change in color occurs. In addition, as shown in Figure 1(b), if the particles are Janus magnetic particles that contain one type of magnetic particle but have different polarities and colors, the two colors are mixed before applying the magnetic field, and then at the pole of the applied magnetic field. As the arrangement of particles changes, a vivid color change effect can be realized.

In this way, when particles of various colors are mixed in one microcapsule, the initial color can be realized in various ways depending on the addition ratio of each particle, and the realized color can also be varied in accordance with the application of a magnetic field.

An example of the microcapsule containing two or more types of particles may include a structure in which the microcapsule includes magnetic particles and non-magnetic particles. In other words, magnetic particles move when a magnetic field is applied, but non-magnetic particles are not affected by the magnetic field, so the position of the particles can be adjusted and the color and tone can be changed.

Figure 2 shows the driving of microcapsules containing colored magnetic particles and white non-magnetic particles by a magnetic field. That is, in microcapsules in which red magnetic particles and white non-magnetic particles are mixed, the red tone is mixed with white and is realized as a light tone (Figure 2(a)), but when a weak magnetic field is applied, the red magnetic particles are slightly localized and become slightly dark. A red tone is realized (Figure 2(b)), and when a strong magnetic field is applied, the red magnetic particles are completely localized to one side, creating a very deep red tone (Figure 2(c)). Therefore, by applying such microcapsules, it is possible to change the color tone.

In addition, as shown in Figure 3, in the case of microcapsules containing blue magnetic particles and red non-magnetic particles, blue and red are mixed to produce a purple tone when no magnetic field is applied (Figure 3(a)), but a weak tone is produced. When a magnetic field is applied, the blue magnetic particles are slightly localized, creating a slightly violet-blue tone (Figure 3(b)), and when a strong magnetic field is applied, the blue magnetic particles are completely localized to one side, creating a blue tone (Figure 3(b)). c)). Therefore, by applying such microcapsules, the color can be changed.

Additionally, as another example, the microcapsule may include first magnetic particles, second magnetic particles, and non-magnetic particles. The driving process of this microcapsule is as shown in FIG. 4. Figure 4 illustrates a case where the colors of the three types of particles are all different, and various colors can be realized by changing the positions of the first and second magnetic particles with different magnetization values depending on the intensity of magnetism.

When the microcapsule contains first magnetic particles (red), second magnetic particles (black), and non-magnetic particles (yellow), the three types of particles are mixed and yellow when no magnetic field is applied. Color is realized, but when a weak magnetic field is applied, the first magnetic particles with different magnetization degrees are distributed and a red color is realized, and when a strong magnetic field is applied, the second magnetic particles with different magnetization degrees are also present in addition to the first magnetic particles. As they are distributed, a black color is realized by the second magnetic particles. At this time, the initially realized color may vary depending on the addition ratio of the three types of particles.

Additionally, as another example, the microcapsule may include Janus magnetic particles. Janus magnetic particles are particles that exhibit the property of changing color depending on the external environment because one particle contains multiple colors. The Janus magnetic particles may be one particle divided into different polarities, or one particle may be divided into different polarities. may be divided into two different colors.

The process by which the microcapsule containing these Janus magnetic particles is driven is as shown in FIG. 5. Referring to FIG. 5, a case is illustrated where Janus magnetic particles are divided into different polarities and have two colors, blue and red, depending on the polarity.

That is, in a state where a magnetic field is not applied, the Janus magnetic particles are randomly arranged, so blue and red are mixed to produce a purple color (FIG. 5(a)), but they are oriented to the opposite pole with respect to one pole of the external magnetic material. The Janus magnetic particles implement a red color (FIG. 5(b)), and when approaching an external magnetic material of another pole, the Janus magnetic particles oriented to the opposite pole with respect to the pole implement a blue color (FIG. 5 (c)).

In addition, the Janus magnetic particles not only change color depending on the pole of the magnetic material approaching from the outside, but may also change color depending on the direction and angle of the magnetic material approaching from the outside.

This is as shown in Figure 6. When the angle of the external magnetic material is changed, the direction of the Janus magnetic particle changes accordingly, so the color density of blue and red constituting the Janus magnetic particle changes, resulting in various color variations from red to blue. It becomes possible.

In addition, the Janus magnetic particles can be manufactured in various shapes, such as rod-shaped, disk-shaped, polygonal, and multiple spheres, as well as spherical shapes, as shown in FIG. 7. By taking these various forms, more diverse color variable effects can be realized as the angle and arrangement are changed by the application of an external magnetic field. These Janus magnetic particles can be manufactured by conventional manufacturing methods such as masking method, phase separation method, and self-assembly method.

Since the microcapsules according to the present invention are easily dispersed in common ingredients constituting cosmetic compositions, they can be applied to various color cosmetics such as lipstick, shadow cheek touch, nail polish, and hair products.

Figure 8 illustrates the color variable effect when the cosmetic composition containing the microcapsules of the present invention is applied to lipstick (Figure 8(a)) and nail polish (Figure 8(b)). When the magnetic material is approached from the outside, a color variable effect occurs, allowing the user to select various color shades according to need.

In addition, since the microcapsules of the present invention are manufactured in a uniform spherical shape as shown in Figure 9(a), they are easily dispersed in the solvent constituting the cosmetic composition, and the dispersibility is further improved by a dispersing agent such as a surfactant used in the cosmetic composition. It can be improved.

When the cosmetic composition is applied on a film and applied and then subjected to an experiment in which an external magnetic body is brought close to the film, it can be seen that there is a clear difference in color tone between the case where the magnetic body is brought close and the magnetic body which is far away, as shown in FIG. 9(b). This confirms the effect of enabling the realization of various colors of color cosmetics.

As described above, the present invention has been described with reference to preferred embodiments, but it is not limited to the above embodiments and various modifications and changes can be made by those skilled in the art without departing from the spirit of the present invention, and such modifications and changes can be made. The examples should be considered as falling within the scope of this invention and the appended claims.

Claims (12)

A microcapsule whose color can be changed by magnetism, wherein the microcapsule includes magnetic particles and non-magnetic particles, the microcapsule includes one or more types of magnetic particles, and the magnetic particle includes titanium oxide, The initial color of the microcapsule is controlled by the ratio of two or more types of particles contained within the microcapsule, and the color of the microcapsule is determined by rearrangement of the magnetic particles within the microcapsule according to the poles of the magnetic material approaching from the outside. A color cosmetic composition characterized by this change.
delete delete delete In claim 1,
A cosmetic composition characterized in that the microcapsules include first magnetic particles, second magnetic particles, and non-magnetic particles.
delete delete delete delete delete delete In claim 1,
A cosmetic composition characterized in that the microcapsule changes color depending on the direction and angle of a magnetic material approaching from the outside.