JPH0510737Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a cosmetic container that changes color in whole or in part when it reaches a certain temperature.

[Conventional technology]

Generally, cosmetic containers that contain cosmetics are made of synthetic resin materials and have chemical resistance, fragrance retention, mechanical and thermal strength, aesthetic appearance, and the like.

[The problem that the idea aims to solve]

However, although the cosmetic containers described above have the above-mentioned functions, they have a problem in that they lack visual interest. For this reason,
Recently, various patterns have been applied to the surface of cosmetic containers to improve their aesthetic appearance, but the color of the cosmetic containers themselves may change due to temperature.
Or, there is no such thing as something that changes to colorless and transparent, revealing the underlying color or pattern.

On the other hand, a sticker made of a reversible thermochromic material is attached to the surface of a cosmetic container, and its color changes to determine which of the several types of cosmetics stored in the container is suitable for the temperature at the time of use. A cosmetic container that allows cosmetics to be stored has been proposed (Jitsukai Sho.
60-168406). However, this method merely changes the seal and does not change the color of the cosmetic container itself, so it has no effect of improving aesthetics or visually appealing.

This idea was developed in light of these circumstances; the surface layer of the container's peripheral wall changes to colorless and transparent due to changes in temperature, making it possible to see through the colored patterns and letters on the layer below. Its purpose is to provide containers for cosmetics.

[Means to solve the problem]

In order to achieve the above purpose, the cosmetic container of this invention has a two-layer structure on the peripheral wall of the container, consisting of a front layer and a back layer, and the surface of the back layer is colored with a temperature-sensitive coloring agent. Or, the front layer is made of a transparent synthetic resin material containing a temperature-sensitive color-changing substance that changes color between a color different from that of the back layer and colorless and transparent. The structure is as follows.

[Effect]

The cosmetics container of this invention has a two-layer structure on the peripheral wall, a front layer and a back layer, and the front layer contains a temperature-sensitive color-changing substance that changes color between colored and colorless and transparent depending on the temperature. Constructed from transparent synthetic resin material.
Therefore, when the temperature-sensitive color-changing substance exceeds the temperature-sensitive range, for example, the coloring of the surface layer, such as navy blue, changes to colorless and transparent, thereby causing the coloring applied to the surface of the layer below it to change. Or characters can be seen through. Therefore, effects such as improved aesthetic appearance and improved visual interest can be obtained. Moreover, this color change can be used as a mark to determine which cosmetic is most suitable for the temperature at the time of use. For example, if you suddenly go outside from indoors in the summer and the temperature suddenly rises, or if you go swimming in an air-conditioned car and exit the car at your destination, the discoloration of the cosmetic container may occur. Because cosmetic containers change color rapidly, even if you forget to switch the cosmetics you are using to UV-blocking types, the discoloration will serve as a landmark, allowing you to switch appropriately and use the cosmetics.

Next, this idea will be explained in detail.

The synthetic resin material that can constitute the cosmetic container may be any material that has the chemical resistance, fragrance retention, mechanical and thermal strength, aesthetics, etc. required for ordinary cosmetic containers. For example, AS (styrene-acrylonitrile copolymer) resin, PS (polystyrene) resin, PP (polypropylene) resin,
PE (polyethylene) resin etc. are used.

As the temperature-sensitive color-changing substance, a mixture mainly consisting of three components: an acid color-developing substance, an acidic substance, and a solvent can be used.

Acid color developing substance develops color with the above acidic substance,
It exhibits a reversible phenomenon of discoloration or discoloration upon deoxidation, and 3,6-bisdiethylamino-o
-Carboxyphenylxanthenelactam, 3-
Examples include xanthene-based substances that develop a red to orange-red color, such as diethylamino-7,8-benzo-o-carboxyphenylxanthenelactam and 3-diethylamino-7-chloro-o-carboxyphenylxanthenelactam. It will be done. Also,
4,4-bisdimethylaminodiphenyl-o-carboxyphenylmethanelactam, 4,4-bisdiaminodiphenyl-o-carboxyphenylmethanelactam, 4,4-bisdimethylaminodiphenyl-p-dimethylamino- Examples include phthalide substances that develop a color from purple to blue, such as o-carboxyfermethanelactam. Furthermore, 3,
Examples include those that exhibit a yellow color, such as 6-diethoxyfluoran. These can be used alone or in combination to obtain the desired color.

The acidic substance acts to develop the color of the above-mentioned acid color developing substance and to determine the depth of the color, and includes dibenzotriazole, 4-laurylaminosulfonylbenzotriazole, 5-butylbenzotriazole, 1,2 , triazoles such as dibutyl 3-triazoledicarboxylate, hydroxyl group-containing substances such as bis-p-hydroxyphenylmethane, methyl β-oxynaphthoate, and phenol formaldehyde, organic acids such as stearic acid, anthracenecarboxylic acid, and phytic acid. , toluidine anthranilate salt, ammonium stearate, 1(3)
Salts such as -acetylbenzotriazole and 1(3)-benzoylbenzotriazole, easily decomposable acid derivatives, etc. are used alone or in combination.

The solvent rapidly dissolves either the acid color developing substance or the acidic substance at a specific temperature, thereby inhibiting the binding of the two. Here, the above-mentioned specific temperature becomes the discoloration temperature, and the discoloration temperature can be freely adjusted by selecting the type of solvent. Typical examples of solvents include alcohols such as cetyl alcohol, dodecyl alcohol, oleyl alcohol, and octyl alcohol, stearylamide, acetoacetylanilide,
Acidamides such as oleylamide, esters such as stearic acid glyceride, lanolin, diphenyl phthalate, isophorone, decalin,
Thermofusible solids such as naphthalene, petroleum, rapeseed oil, wood wax, and paraffin wax can be used.

The temperature-sensitive color-changing substance is made by solid-dissolving the above three components consisting of the acid color-developing substance, acidic substance, and solvent, or adding other additives in a non-thermoplastic resin, and forming it into a granule. As the non-thermoplastic resin, polyurethane resin, epoxy resin, melamine resin, phenol resin, furan resin, diallyl phthalate resin, epoxy phthalate resin, etc. can be used. In addition, as compounds for forming a film that covers and protects the granular solid solution, natural polymer compounds such as alginate, carrageenan, pectin, chitosan salt, cationized starch, carboxymethylated starch, carboxylated guar gum, etc. Semi-synthetic polymer compounds such as polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid amide, polymaleic acid copolymers, etc., and mixtures thereof are used. In addition, examples of the above-mentioned other additives include surfactants and the like.

The cosmetic container of this invention can be obtained, for example, in the following manner using the thermochromic substance-containing synthetic resin material. First, the thermochromic substance described above is manufactured. This product is manufactured in the following manner, taking into consideration the special characteristics of cosmetic containers. At first,
For 0.5 to 5 parts by weight (hereinafter abbreviated as "parts") of the acid color developing substance, 0.5 to 5 parts of the acidic substance, preferably 1 to 3 parts, and 10 to 60 parts of the solvent, preferably 20 to 50 parts.
5 to 40 parts, preferably 10 to 30 parts, of a non-thermoplastic resin are mixed to form a solid solution of the above three components. Next, this is poured into a solution in which 3 to 50 parts of the above-mentioned film-forming substance is dissolved while stirring, and the oil droplets are solidified into granules and thermochromic granules are produced.

Next, a cosmetic container is made using the temperature-sensitive color-changing substance. That is, 5 to 50 parts of the thermochromic substance is added to 100 parts of the resin in the synthetic resin material.
A cosmetic container is obtained by mixing preferably 15 to 30 parts and molding this mixture by injection molding or the like.

In this case, the above-mentioned cosmetic container can freely select the color that will change color by combining the types and compounding ratios of the three components used in the thermochromic substance, and the temperature at which the color will change can be adjusted between -40 and 200°C. It can be set freely within the range. In addition, the above-mentioned cosmetic containers are not colored only with the above-mentioned thermochromic substance, but the ground color is formed with conventionally known dyes and pigments, and the density of the ground color can be changed or the hue can be changed with the thermochromic substance. You may also change it.

Next, a detailed explanation will be given based on an example of this invention.

[Example 1] <Production of thermochromic substance> For 100 parts of a 10% gelatin aqueous solution at 85°C, 4,
3 parts of 4-bisdimethylaminodiphenyl-p-dimethylamino-o-carboxyphenylmethane lactam, 2 parts of dibenzotriazole, 35 parts of octyl alcohol, epoxy resin (manufactured by Yuka Ciel Epoxy Co., Ltd., Epicoat #828) , 6 parts of an epoxy resin curing agent (Epicure U, manufactured by Yuka Ciel Epoxy Co., Ltd.), and 2 parts of silicon dioxide (Aerosil, manufactured by Nippon Aerosil Co., Ltd.) were mixed, and the mixture was filtered to obtain granules. Next, this was washed with water and air-dried to obtain 52 parts of granules. Next, 52 parts of this granular material was mixed with 8 parts of polyvinyl alcohol.
% aqueous solution, 10 parts of aluminum stearate fine powder, and 15 parts of surfactant, and then, while stirring, add 255 parts of carboxymethyl cellulose 10% aqueous solution and 50% aqueous solution to the mixture.
28 parts of tannic acid aqueous solution, 55 parts of table salt, 6 parts of borax
Added part. The resulting granules were diluted with saturated saline and filtered to obtain 75 to 85 parts of a granular thermochromic material.

<Manufacture of cosmetic container> 20 parts of the above thermochromic substance and 100 parts of colorless transparent polypropylene resin were mixed to prepare a molding material for forming a surface layer. On the other hand, 10 parts of a deep red coloring agent and 100 parts of a polypropylene resin were mixed to prepare a molding material for forming a back layer. Next, using these two types of molding materials, a molded product is formed into a two-layered laminate using the conventionally known double injection molding method (injection molding is performed in two steps), as shown in Figure 1. A cosmetic container 1 as shown was manufactured.

<Color change in cosmetic container> The above cosmetic container has a dark blue color at temperatures below 5°C to 15°C, but at higher temperatures, the color of the surface layer gradually decreases and becomes almost colorless and transparent. . As a result, the deep red color of the layer on the lower side of the back side becomes transparent, resulting in a two-color change. This cosmetic container 1 is provided with two upper and lower storage sections 2a and 2b of the same shape, and as shown in FIG.
a and 3b are accommodated. On both sides of the cosmetic container, there is a dark blue label 1a and a deep red label 1b.
are attached, and the letters ``summer'' and ``winter'' are printed corresponding to each label 1a, 1b. Therefore, it is possible to select and use the cosmetics according to the color change, from dark blue from autumn to winter to deep red from spring to summer.

Furthermore, if other patterns or letters are formed on the crimson surface of the back layer, the aesthetic appearance will be improved. It is also possible to display precautions such as the use of ultraviolet cut type.

[Effect of idea]

The cosmetics container of this invention has a two-layer structure on the circumferential wall of the container, a front layer and a back layer, and the surface of the back layer is colored with a normal coloring agent or has letters written on it.
The surface layer is made of a transparent synthetic resin material containing a thermochromic substance that changes colorless and transparent when sensitive to temperature. Therefore, when the temperature exceeds a predetermined temperature, the layer on the front side of the peripheral wall of the container changes to colorless and transparent, and the coloring or letters of the layer on the back side, or even a combination thereof, can be formed on the underside. Therefore, it is possible to obtain the effect of improving aesthetic appearance and the effect of improving interest based on the above-mentioned color change, and it is also possible to use the color change of the cosmetic container itself as a guide to teach cosmetics that are most suitable for the temperature at the time of use. becomes.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of this invention, FIG. 2 is a perspective view of the device in an open state, and FIG. 3 is an explanatory diagram showing the layered structure of the peripheral wall of the device shown in FIG. 1... Cosmetic container, 1a, 1b... Label,
2a, 2b...Cosmetic storage section.

Claims (1)

[Scope of utility model registration request] The peripheral wall of the container has a two-layer structure of a front layer and a back layer, and the surface of the back layer is colored or written with a coloring agent that does not change color due to temperature sensitivity. A cosmetic container characterized in that it is made of a transparent synthetic resin material containing a temperature-sensitive color-changing substance that changes color between being colored in a color different from that of the side layer and being colorless and transparent.