Cooling composition and cooling patch

Abstract

The invention relates to a cooling composition and a cooling patch. The cooling composition according to the present invention contains 0.8-2.5 mass% of a component (A), namely a cooling agent, and 80 mass% or more of a component (B), namely a hydrogel, wherein the component (A) is selected from the group consisting of: (a0) menthol; (a1) menthyl lactate; and (a2) at least one component selected from the group consisting of N-ethyl-5-methyl-2-(1-methylethyl) cyclohexylamide, N-(ethoxycarbonylmethyl)-p-alkyl-3-carboxamide, and N-(4-methoxyphenyl)-p-menthyl-3-carboxamide. The composition is characterized in that: (a1) is one or two or more components selected from the group consisting of N-ethyl-5-methyl-2-(1-methylethyl) cyclohexylamide, N-(ethoxycarbonylmethyl)-p-alkyl-3-carboxamide; in the cooling composition, the content of the component (a1) is 0.5-2% by mass, the content of the component (a2) is 0-0.3% by mass, and the mass ratio (a1 / a0) is 0.5-11. The cooling patch comprises a layer which is 1.0-2.0 mm thick and is composed of the cooling composition disclosed by the invention.

Description

Technical Field

[0001] The present invention relates to a cooling composition for application to the skin, a cooling patch, and methods for using them. Background Art

[0002] Currently, there are many methods for refreshing the mind. For example, there is a method of refreshing the mind by ingesting caffeine-containing substances such as coffee. However, this method is prone to caffeine dependence, and if a large amount of caffeine is ingested, it will cause harm to the body. In addition, there is a method of using essential balm or cooling oil to refresh the mind. However, essential balm or cooling oil has strong irritation and a strong smell, so if used in public places such as offices, it will affect others, and thus is restricted in terms of usage occasions. In addition, some people also use nasal inhalers to refresh the mind. However, nasal inhalers are not elegant or hygienic to use, and their effects are not long-lasting. Summary of the Invention

[0003] The present invention has been developed in view of the above-mentioned existing technical problems.

[0004] The present invention provides a cooling composition, wherein,

[0005] it contains: component (A) a cooling agent and (B) a hydrogel,

[0006] the content of component (A) is 0.8 to 2.5% by mass,

[0007] the content of component (B) is 80% by mass or more,

[0008] component (A) is selected from the following components (a0), (a1), (a2),

[0009] (a0) menthol,

[0010] (a1) menthyl lactate,

[0011] (a2) one or more components selected from N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide, N-(ethoxycarbonylmethyl)-p-menthane-3-carboxamide, and N-(4-methoxyphenyl)-p-menthane-3-carboxamide,

[0012] Moreover, in this cooling composition, the content of component (a1) is 0.5 to 2% by mass, the content of component (a2) is 0 to 0.3% by mass, and the mass ratio (a1 / a0) of the content of component (a1) to the content of component (a0) is 0.5 to 11.

[0013] In the cooling composition of the present invention, preferably, the mass ratio (a1 / a0) of the content of component (a1) to the content of component (a0) is 1.2 to 11.

[0014] In the cooling composition of the present invention, preferably, the content of component (a0) is 0.1 to 1% by mass.

[0015] In the cooling composition of the present invention, preferably, it further contains 0.1 to 1% by mass of component (C) oil agent.

[0016] In the cooling composition of the present invention, preferably, the water content in component (B) hydrogel is 65 to 90% by mass.

[0017] The present invention also relates to providing a cooling patch, which includes: a layer composed of the above-mentioned cooling composition of the present invention with a thickness of 1.0 to 2.0 mm.

[0018] Preferably, the area of the layer composed of the above-mentioned cooling composition of the present invention in the cooling patch of the present invention is 5 to 9 cm 2 。

[0019] Preferably, the mass per unit area of the layer composed of the above-mentioned cooling composition of the present invention in the cooling patch of the present invention is 0.08 to 0.2 g / cm 2 。

[0020] Preferably, the cooling patch of the present invention includes a substrate, and the above-mentioned layer composed of the cooling composition of the present invention is disposed on the substrate.

[0021] Preferably, the cooling patch of the present invention includes a substrate and a peelable film, and the above-mentioned layer composed of the cooling composition of the present invention is disposed between the substrate and the peelable film.

[0022] The present invention also relates to a method for making the skin feel cool, wherein the cooling composition of the present invention is applied to the skin, preferably, the cooling composition of the present invention is applied to the skin and kept for 30 to 120 minutes, more preferably, the cooling composition of the present invention is applied to the skin and kept for 30 to 60 minutes; in addition, preferably, the cooling composition of the present invention is applied to the skin corresponding to the temple on the face.

[0023] On the other hand, the present invention also relates to a method for making the skin feel cool, wherein the above-mentioned cooling patch of the present invention is applied to the skin in such a way that the cooling composition is in direct contact with the skin, preferably, the above-mentioned cooling patch of the present invention is applied to the skin in such a way that the cooling composition is in direct contact with the skin and kept for 30 to 60 minutes, in addition, preferably, the above-mentioned cooling patch of the present invention is applied to the skin corresponding to the temple on the face in such a way that the cooling composition is in direct contact with the skin.

[0024] On the other hand, the present invention also relates to a refreshing method, wherein the cooling patch of the present invention is applied to the skin corresponding to the temple on the face, so that the cooling composition is in direct contact with the skin.

[0025] According to the cooling composition and cooling patch of the present invention, by applying it to the skin in a way that the cooling composition directly contacts the skin, especially by applying it to the skin corresponding to the temple of the face in a way that the cooling composition directly contacts the skin, it can effectively make the skin feel cool and effectively refresh the mind.

[0026] According to the cooling composition and cooling patch of the present invention, not only can people feel a significant sense of coolness in a short time, but also they can still feel the coolness after a long period of use. Further, the coolness during the process will not be too high to cause skin irritation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram showing a scoring table of the intensity of the sense of coolness. DETAILED DESCRIPTION OF THE INVENTION

[0028] The technical problem to be solved by the present invention is to provide a cooling composition which can effectively make the skin feel cool and effectively refresh the mind when applied to the skin, especially when applied to the skin corresponding to the temple of the face.

[0029] The inventor of the present invention has conducted various studies in order to develop a product that is safe, mild and non-irritating, beautiful, long-lasting, has a light fragrance, is easy to use, and can refresh the mind. As a result, it has been found that by using a cooling agent and a hydrogel in a specific content combination, the purpose can be achieved.

[0030] The cooling composition of the present invention contains component (A) a cooling agent and (B) a hydrogel.

[0031] [Component (A) Cooling Agent]

[0032] Regarding the content of component (A) the cooling agent in the cooling composition of the present invention, from the viewpoint of achieving a cooling effect for a certain period of time, it is 0.8% by mass or more, preferably 1.0% by mass or more, more preferably 1.2% by mass or more; from the viewpoints of the mildness of the cooling effect and the stability of the composition, it is 2.5% by mass or less, preferably 2.0% by mass or less, more preferably 1.6% by mass or less. Considering the above viewpoints comprehensively, the content of component (A) the cooling agent in the cooling composition is 0.8 - 2.5% by mass, preferably 1.0 - 2.0% by mass, more preferably 1.2 - 1.6% by mass.

[0033] In the present invention, component (A) is selected from the following components (a0), (a1), (a2),

[0034] (a0) Menthol,

[0035] (a1) Menthol lactate,

[0036] (a2) One or more components selected from N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide, N-(ethoxycarbonylmethyl)-p-menthane-3-carboxamide, and N-(4-methoxyphenyl)-p-menthane-3-carboxamide.

[0037] Among them, the structural formulas of N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide (hereinafter sometimes simply referred to as "WS-3"), N-(ethoxycarbonylmethyl)-p-menthane-3-carboxamide (hereinafter sometimes simply referred to as "WS-5"), and N-(4-methoxyphenyl)-p-menthane-3-carboxamide (hereinafter sometimes simply referred to as "WS-12"), which are used as component (a2), are as follows.

[0038]

[0039] From the viewpoint of the persistence of the cooling effect, the content of component (a1) in the cooling composition of the present invention is 0.5% by mass or more, preferably 1.0% by mass or more, and more preferably 1.5% by mass or more; from the viewpoint of the stability of the composition, it is 2.0% by mass or less, preferably 1.8% by mass or less. Considering the above viewpoints comprehensively, the content of component (a1) in the cooling composition is 0.5 to 2.0% by mass, preferably 1.0 to 2.0% by mass.

[0040] In the cooling composition of the present invention, from the viewpoint of the immediate effect of the cooling effect, the content of component (a2) is 0 or more, preferably 0.01% by mass or more, and more preferably 0.05% by mass or more; from the viewpoint of the mildness of the cooling effect, it is 0.3% by mass or less, preferably 0.2% by mass or less, more preferably 0.15% by mass or less, and still more preferably 0.1% by mass or less. Considering the above viewpoints comprehensively, the content of component (a2) in the cooling composition is 0 to 0.3% by mass, preferably 0.01 to 0.2% by mass, more preferably 0.05 to 0.15% by mass, and further preferably 0.05 to 0.1% by mass.

[0041] In the cooling composition of the present invention, from the viewpoint of the persistence of the cooling effect, the mass ratio (a1 / a0) of the content of component (a1) to the content of component (a0) is 0.5 or more, preferably 0.7 or more, preferably 1.2 or more, more preferably 1.4 or more, and further preferably 2 or more; from the viewpoint of maintaining the immediate effect of the cooling feeling effect, it is 11 or less, preferably 5 or less. Considering the above viewpoints comprehensively, the mass ratio (a1 / a0) of the content of component (a1) to the content of component (a0) in the cooling composition is 0.5 to 11, preferably 0.7 to 11, preferably 1.2 to 11, more preferably 2 to 11, and further preferably 2 to 5.

[0042] [Component (B) Hydrogel]

[0043] The content of the component (B) hydrogel in the refreshing composition of the present invention is 80% by mass or more, preferably 85% by mass or more, and more preferably 87.5% by mass or more.

[0044] As the component (B) hydrogel in the present invention, any hydrogel commonly used in cosmetics may be used. For example, as the component (B) hydrogel, examples include hydrogels formed by cross-linked structures of anionic polymers, hydrogels cross-linked by intermolecular hydrogen bonds, etc. The component (B) hydrogel can serve as a support for the composition of the present invention, and it has the functions of providing moisture supply and skin occlusion. The cross-linked structure of the anionic polymer is formed by using an anionic polymer, a cross-linking agent, and water, and a chemical reaction occurs between the anionic polymer and the cross-linking agent to form a fine mesh structure as the basic skeleton of the hydrogel. The hydrogel chemically cross-linked by an anionic polymer is water-insoluble, and a large amount of water is retained in its mesh structure and swells, so it has appropriate elasticity, ductility, and softness. Moreover, since the chemically cross-linked hydrogel has less thermoplasticity than agar, etc., its shape retention is stable for a wide range of use temperatures, and it is very useful as a support for tablets used by sticking on the body.

[0045] As the anionic polymer used to form the component (B) hydrogel in the present invention, for example, polymers having a carboxyl group, a sulfate group, and a phosphate group can be cited. Specifically, anionic cellulose derivatives such as poly(meth)acrylic acids, carboxyvinyl polymer, carboxymethyl cellulose, and carboxyethyl cellulose, carrageenan, alginic acid and its salts, anionic starch derivatives, etc. can be cited. In particular, in order to obtain a hydrogel layer that fully satisfies high water retention, sufficient gel strength, and softness that can follow the unevenness and movement of the skin, etc., it is preferably to contain at least one of poly(meth)acrylic acids, anionic cellulose derivatives, and carrageenan. Moreover, for the reasons that the moisture balance between the hydrogel layer and the moisturizing layer can be easily controlled during lamination, the high moisture content of the moisturizing agent layer can be maintained, and it is easily available, anionic cellulose derivatives are preferred, and carboxymethyl cellulose is particularly preferred.

[0046] The content of the anionic polymer in the component (B) hydrogel is preferably 0.5 to 25% by weight, more preferably 3 to 10% by weight in the hydrogel liquid. In addition, for adjusting the viscosity of the gel in the uncrosslinked state and improving the shape retention of the crosslinked gel by physically winding into the mesh structure of the anionic polymer, when a water-soluble polymer described later is blended, the content of the anionic polymer in the hydrogel liquid is preferably 0.5 to 6% by weight.

[0047] Component (B) The hydrogel contains water, and the water content in the component (B) hydrogel is 65% by mass or more, preferably 67% by mass or more, more preferably 70% by mass or more, and further, 95% by mass or less, preferably 93% by mass or less, more preferably 90% by mass or less. In addition, the water content in the component (B) hydrogel in the present invention is 65 to 95% by mass, preferably 67 to 93% by mass, more preferably 70 to 90% by mass.

[0048] If the water content in the component (B) hydrogel is within the above range, the dissolution and dispersibility of water, the gelling agent, and other components are all good, and it is suitable for operability such as coating. If the water content is too small, the dispersion and solubility of the anionic polymer and other compounding matrices become insufficient, resulting in problems such as a decrease in operability during manufacturing, a decrease in the shape retention of the formed hydrogel layer, and non-uniformity. In addition, if the content is too large, problems such as a decrease in the shape retention of the hydrogel layer and gel fragmentation during use will occur.

[0049] As the water contained in the component (B) hydrogel, various waters can be used. For example, natural waters such as hot spring water and spring water, as well as tap water, purified water, ion-exchanged water, etc. can be used.

[0050] As the crosslinking agent, metal ion compounds, cationic polymers, and polyfunctional epoxy compounds can be used, and they are appropriately selected according to the reactivity with the functional groups of the anionic polymer used.

[0051] As the metal ion compound, oxides, hydroxides, salts, etc. containing aluminum, magnesium, calcium, potassium, etc. can be cited. For example, aluminum hydroxide, potassium alum, aluminum sulfate, aluminum oxide, aluminum glycinate, aluminum acetate, aluminum lactate, aluminum stearate, hydrated aluminum silicate, aluminum metasilicate, MagnesiumAluminometasilicate, magnesium chloride, magnesium stearate, calcium carbonate, calcium hydroxide, kaolin, synthetic hydrotalcite, potassium hydroxide, etc. can be used, and these can be used singly or in combination of two or more.

[0052] [Component (C) Oil agent]

[0053] In the refreshing composition of the present invention, it is preferably further contained with component (C) an oil agent. As the component (C) oil agent, from the perspective of being better incorporated into the system of the composition of the present invention, a polar oil agent is preferred. In the refreshing composition of the present invention, (B) a hydrogel is contained, and water molecules are polar. According to the principle of like dissolves like, when the component (C) oil agent is a polar oil agent, this oil agent can be better incorporated into the hydrogel system, so it is preferred. On the other hand, a part of the cooling agent of component (A) contained in the refreshing composition of the present invention can be partially dissolved in the polar oil agent, thereby increasing the stability of the composition system.

[0054] Regarding polar oil agents, for example, polar vegetable oils, silicone oils, synthetic ester oils can be cited. Preferred are synthetic ester oils with polarity, such as isopropyl palmitate, isopropyl myristate, ethyl ethyl palmitate, triglyceride of caprylic acid / capric acid, etc. Regarding polar oil agents, one of these oil agents can be used, or two or more of these oil agents can be combined and used.

[0055] In the refreshing composition of the present invention, from the perspective of the persistence of the refreshing effect, the content of the component (C) oil agent can be 0.1% by mass or more, preferably 0.2% by mass or more, more preferably 0.3% by mass or more; from the perspective of maintaining the immediacy of the refreshing effect, it can be 1.0% by mass or less, preferably 0.8% by mass or less, more preferably 0.7% by mass or less. Considering the above viewpoints comprehensively, the content of the component (C) oil agent in the refreshing composition can be 0.1 - 1% by mass, preferably 0.2 - 0.8% by mass, more preferably 0.3 - 0.7% by mass.

[0056] The reason for the component (C) oil agent to affect the cooling effect is not yet clear. The inventors of the present invention speculate as follows. Since the cooling agent used in the composition of the present invention is oil-soluble, when a small amount of oil agent is added, a small part of the cooling agent will be dissolved in the oil agent, thereby slowing down its penetration rate into the skin, thus improving the persistence of the cooling effect. On the other hand, if too much oil agent is added, the penetration rate of the cooling agent into the skin will be excessively reduced, thereby causing a decline in the immediacy of the refreshing feeling.

[0057] [Other components]

[0058] In addition to containing the above components, in the refreshing composition of the present invention, within the range that does not damage the effects of the present invention, other components commonly contained in cosmetic compositions can also be contained. As such other components, for example, antioxidants, pH regulators, moisturizers, stabilizers, cross-linking agents, preservatives, solubilizers, colorants, fragrances, etc. can be cited. Regarding the content of other components in the refreshing composition of the present invention, it can be specifically adjusted according to specific circumstances.

[0059] [Preparation method of the composition]

[0060] The cooling composition of the present invention can be manufactured by the following method. For example: First, the above-mentioned component (A), the raw material for forming the hydrogel of component (B), and component (C) and other components used as required are weighed and formulated in such a way that they have the above-mentioned contents and mass ratios, and they are mixed by a conventional method to prepare an uncrosslinked gel stock solution; then, it is cured at a temperature of 25 to 60 °C for 1 to 8 days to allow crosslinking to proceed, thereby obtaining the cooling composition of the present invention.

[0061] [Method of using the composition]

[0062] The cooling composition of the present invention can be directly applied to the skin of the human body. Preferably, the cooling composition is applied to the skin and kept for 30 to 120 minutes, preferably for 30 to 60 minutes.

[0063] When the cooling composition of the present invention is applied to the skin of the human body, the thickness of the composition is 1.0 to 2.0 mm, preferably 1.3 to 1.7 mm, and more preferably 1.4 to 1.6 mm.

[0064] From the viewpoints of water retention, instantaneousness and persistence of the cooling effect, when the cooling composition of the present invention is applied to the skin of the human body, the thickness of the composition is at least 1.0 mm or more, preferably 1.3 mm or more. On the other hand, from the viewpoints of being easily detached due to its own weight when pasted on the body, the foreign body sensation caused by being too heavy, and the mildness of the cooling effect, the thickness is preferably 1.7 mm or less.

[0065] By using the cooling composition of the present invention in the above manner, not only can a significant sense of coolness (i.e., effectiveness) be felt in a short time, but also a sense of coolness can still be felt after a long use time (persistence). Further, the sense of coolness during the process will not be too high to cause skin irritation (mildness).

[0066] As a way of the method of using the composition, the present invention provides a method for making the skin feel cool, which is to apply the cooling composition of the present invention to the skin. Preferably, the cooling composition of the present invention is applied to the skin and kept for 30 to 120 minutes, and more preferably, the cooling composition of the present invention is applied to the skin and kept for 30 to 60 minutes; in addition, preferably, the cooling composition of the present invention is applied to the skin corresponding to the temple of the face.

[0067] [Cooling patch]

[0068] The cooling composition of the present invention is preferably made into a cooling patch, for example, for easy use. The cooling patch of the present invention includes: a layer composed of the cooling composition of the present invention with a thickness of 1.0 to 2.0 mm.

[0069] For the cooling patch of the present invention, from the perspective of comprehensively considering the persistence, mildness, etc. of the cooling effect of the composition, the area of the layer composed of the above-mentioned cooling composition of the present invention is 5 to 9 cm 2 , preferably 6 to 9 cm 2 , more preferably 6.5 to 8 cm 2 .

[0070] For the cooling patch of the present invention, from the perspective of comprehensively considering the persistence, mildness of the cooling effect of the composition, avoiding easy detachment due to its own weight when pasted on the body, and avoiding the foreign body sensation caused by being too thick, etc., the mass per unit area (grammage) of the layer composed of the cooling composition is 0.08 to 0.2 g / cm 2 , preferably 0.1 to 0.18 g / cm 2 , more preferably 0.12 to 0.16 g / cm 2 .

[0071] The cooling patch of the present invention may also include a substrate, and a layer composed of the cooling composition of the present invention with a thickness of 1.0 to 2.0 mm is disposed on the substrate.

[0072] Examples of the substrate include non-woven fabric, plastic film, or plastic sheet. The area of the substrate can be set to 5 to 9 cm 2 , preferably 6 to 9 cm 2 , more preferably 6.5 to 8 cm 2 . The area of the substrate and the layer composed of the cooling composition of the present invention may be the same or different, and preferably the same.

[0073] The cooling patch of the present invention may also include a peelable film, and the peelable film is disposed above the layer composed of the cooling composition of the present invention with a thickness of 1.0 to 2.0 mm.

[0074] The cooling patch of the present invention preferably includes a substrate and a peelable film. At this time, a layer composed of the cooling composition of the present invention with a thickness of 1.0 to 2.0 mm is disposed between the substrate and the peelable film.

[0075] Examples of the peelable film include plastic films such as polyethylene film, polypropylene film, and polyvinyl chloride film. As long as it is a film that can be peeled from the hydrogel layer, there is no particular limitation. The area of the peelable film is 5 to 9 cm 2 , preferably 6 to 9 cm 2 , more preferably 6.5 to 8 cm 2 . The areas of the substrate and the peelable film may be the same or different, and preferably the areas of the two are the same.

[0076] For the cooling patch of the present invention, the thickness of the layer composed of the cooling composition of the present invention is 1.0 to 2.0 mm, preferably 1.3 to 1.7 mm, and more preferably 1.4 to 1.6 mm.

[0077] In one embodiment, when the cooling patch of the present invention includes a substrate and a peelable film, for example, it can be manufactured according to the following method. Specifically: First, mix the above-mentioned component (A), the raw materials for forming the hydrogel of component (B), and the component (C) and other components used as required to prepare an uncrosslinked gel stock solution; then, make the uncrosslinked gel stock solution into a thin sheet with one side being a peelable film and the other side being a substrate; then, by curing the obtained thin sheet at a temperature of 25 to 60 °C for 1 to 8 days to cause crosslinking, the cooling patch of the present invention is obtained.

[0078] When using the cooling patch of the present invention, the layer composed of the cooling composition in the cooling patch is attached to the skin for use, so that not only can a significant sense of coolness (i.e., effectiveness) be felt by people in a short time, but also a sense of coolness can still be felt after a long use time (persistence). Further, the sense of coolness during the process will not be too high to cause skin irritation (mildness).

[0079] As a way of the using method of the cooling patch of the present invention, the present invention provides a method for making the skin feel cool, wherein the above-mentioned cooling patch of the present invention is applied to the skin in such a way that the cooling composition is in direct contact with the skin, that is, the layer composed of the cooling composition in the cooling patch is in direct contact with the skin. Here, it is preferably to apply the above-mentioned cooling patch of the present invention to the skin in such a way that the cooling composition is in direct contact with the skin and keep it for 30 to 60 minutes. In addition, it is preferably to apply the above-mentioned cooling patch of the present invention to the skin corresponding to the temple on the face in such a way that the cooling composition is in direct contact with the skin.

[0080] In addition, as another way of the using method of the cooling patch of the present invention, the present invention provides a refreshing method, wherein the cooling patch is applied to the skin corresponding to the temple on the face in such a way that the cooling composition is in direct contact with the skin, that is, the layer composed of the cooling composition in the cooling patch is in direct contact with the skin. Here, it is preferably to apply the cooling patch to the skin corresponding to the temple on the face in such a way that the cooling composition is in direct contact with the skin and keep it for 30 to 60 minutes.

[0081] [Examples]

[0082] Cooling compositions were prepared with the compositions shown in Tables 1 to 5 below, and respective evaluation cooling patch samples were prepared with these cooling compositions. Among them, the formula of the hydrogel of component (B) is as follows.

[0083] Table i: Formula of the hydrogel of component (B)

[0084]

[0085] (Preparation of Cooling Patch Samples for Evaluation)

[0086] The evaluation cooling patch samples were prepared as follows.

[0087] First, the above-mentioned component (A), the raw materials for forming the hydrogel of component (B) (i.e., the hydrogel raw materials and water shown in Table I above), and component (C) and other components added as required were mixed to prepare an uncrosslinked gel stock solution; then, the uncrosslinked gel stock solution was made into a thin sheet with a peelable film on one side and a substrate on the other side; then, the thin sheet was cut into a circular shape; then, the obtained circular thin sheet was cured at a temperature of 50 °C for 3 days to carry out crosslinking, thereby obtaining the evaluation cooling patch samples.

[0088] [Evaluation Method]

[0089] [Cooling Sensation Intensity Test Method]

[0090] Four professional subjects used and evaluated the cooling patch samples according to the following steps (1) to (3), with at least a 2-hour interval between every two samples for each person. The average of the 4 scores at each time point was taken (to 1 decimal place) to obtain the final result.

[0091] (1) Remove the cooling patch sample from the release film and apply it to both temple areas in a way that the gel-like cooling composition directly contacts the skin for 1 hour.

[0092] (2) According to the cooling sensation intensity scoring table and combined with one's own feelings, score the left and right sides respectively at the specified 3 time points (the 3 time points are: 1 minute, 15 minutes, and 60 minutes). The cooling sensation intensity scoring table is as Figure 1 shown.

[0093] (3) For each cooling patch sample, take the average of the scores of the left and right sides and record it in the table exemplified below.

[0094] Table II: Scoring Table Recording Method

[0095]

[0096] The evaluation criteria for the quality of the cooling sensation are shown in the following table. Compare the final result at each time point with the following table to obtain the three scores of the cooling sensation of each sample.

[0097] Table III: Evaluation Criteria for the Quality of the Cooling Sensation

[0098]

[0099] *Among them, the change value = final value - initial value.

[0100] Here it should be noted that: when the score is in the range of 2 to 10 points, a sense of coolness can be felt; when the score exceeds 8 points, as the sense of coolness continues to increase, a sense of pain (such as stinging, spicy pain, etc.) will gradually occur. Therefore, the maximum value of the sense of coolness should not be too large. In addition, since the perception of the sense of coolness on the left and right sides may not be the same, the left and right sides are scored separately, and the average value of the two sides is taken.

[0101] In the following Examples 1 to 17 and Comparative Examples 1 to 2, the thickness of the cooling patch is 1.4 mm, and the diameter of the cooling patch is 2.8 cm. In the following Examples 18 to 21, the thickness and area of the cooling patch are the values shown in Table 5.

[0102] Table 1

[0103]

[0104] *1: "WS-3" refers to N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide.

[0105] *3: "COCONAD MT" is caprylic / capric triglyceride.

[0106] Table 2

[0107]

[0108] *1: "WS-3" refers to N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide. *3: "COCONAD MT" is caprylic / capric triglyceride.

[0109] Table 3

[0110]

[0111] *1: "WS-3" refers to N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide. *3: "COCONAD MT" is caprylic / capric triglyceride.

[0112] Table 4

[0113]

[0114] *1: "WS-3" is N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide. *2: "WS-5" is N-(ethoxycarbonylmethyl)-p-menthane-3-carboxamide.

[0115] *3: "COCONAD MT" is caprylic / capric triglyceride.

[0116] Table 5

[0117]

[0118] *1: "WS-3" refers to N-ethyl-5-methyl-2-(1-methylethyl) cyclohexanecarboxamide.

[0119] *3: "COCONAD MT" is triglyceride of caprylic acid / capric acid.

[0120] *4: The "thickness H" represents the thickness of the cooling composition disposed between the substrate and the peelable film.

[0121] *5: The "area S" represents the area of the substrate. And when the cooling patch is applied to the skin, the area of contact between the cooling composition and the skin is the same as the area of the above substrate.

[0122] *6: The "basis weight" represents the mass per unit area of the cooling composition disposed on the substrate.

Claims

1. A cooling composition, wherein, it contains: component (A) a cooling agent and component (B) a hydrogel, the content of component (A) is 0.8 to 2.5% by mass, the content of component (B) is 80% by mass or more, component (A) is selected from the following components (a0), (a1), (a2), (a0) menthol, (a1) menthyl lactate, (a2) one or more components selected from N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide, N-(ethoxycarbonylmethyl)-p-menthane-3-carboxamide, and N-(4-methoxyphenyl)-p-menthane-3-carboxamide, and, the content of component (a1) is 0.5 to 2% by mass, the content of component (a2) is 0 to 0.3% by mass, and the mass ratio (a1 / a0) of the content of component (a1) to the content of component (a0) is 0.5 to 11.

2. The cooling composition according to claim 1, wherein, the mass ratio (a1 / a0) of the content of component (a1) to the content of component (a0) is 1.2 to 11.

3. The cooling composition according to claim 1, wherein, the content of component (a0) is 0.1 to 1% by mass.

4. The cooling composition according to any one of claims 1 to 3, wherein, it further contains 0.1 to 1% by mass of component (C) an oil agent.

5. The cooling composition according to any one of claims 1 to 3, wherein, the water content in component (B) the hydrogel is 65 to 90% by mass.

6. A cooling patch, wherein, it includes: a layer with a thickness of 1.0 to 2.0 mm and composed of the cooling composition according to any one of claims 1 to 5.

7. The cooling patch according to claim 6, wherein, The area of the layer composed of the refreshing composition is 5 to 9 cm 2 .

8. The cooling patch according to claim 6, wherein, The mass per unit area of the layer composed of the refreshing composition is 0.08 to 0.2 g / cm 2 .

9. The cooling patch according to any one of claims 6 to 8, wherein, it further includes a substrate, and the layer composed of the cooling composition is disposed on the substrate.

10. The cooling patch according to claim 9, wherein, it further includes a peelable film, and the layer composed of the cooling composition is disposed between the substrate and the peelable film.

11. A method for making the skin feel cool, wherein, the cooling composition according to any one of claims 1 to 5 is applied to the skin.

12. The method for making the skin feel cool according to claim 11, wherein, the cooling composition according to any one of claims 1 to 5 is applied to the skin and kept for 30 to 120 minutes.

13. The method for making the skin feel cool according to claim 11, wherein, the cooling composition according to any one of claims 1 to 5 is applied to the skin and kept for 30 to 60 minutes.

14. The method for making the skin feel cool according to any one of claims 11 to 13, wherein, the cooling composition according to any one of claims 1 to 5 is applied to the skin corresponding to the temple on the face.

15. A method for making the skin feel cool, wherein, the cooling patch according to any one of claims 6 to 10 is applied to the skin in such a way that the cooling composition is in direct contact with the skin.

16. The method for making the skin feel cool as claimed in claim 15, wherein, the cooling patch as claimed in any one of claims 6 to 10 is applied to the skin in such a way that the cooling composition is in direct contact with the skin and kept for 30 to 60 minutes.

17. The method for making the skin feel cool as claimed in claim 15 or 16, wherein, the cooling patch as claimed in any one of claims 6 to 10 is applied to the skin corresponding to the temple on the face in such a way that the cooling composition is in direct contact with the skin.

18. A method for refreshing, wherein, the cooling patch as claimed in any one of claims 6 to 10 is applied to the skin corresponding to the temple on the face in such a way that the cooling composition is in direct contact with the skin.

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