JP2001019606A5 - - Google Patents

Description

[Claims]
(1)
A cosmetic composition in which a plurality of agents are mixed at the time of use, wherein the acidic substance and a metal oxide and / or metal hydroxide that form a neutralizing salt with the acidic substance are mixed with the acidic substance and the metal oxide. A cosmetic comprising a neutralizing salt-forming reaction with a product and / or a metal hydroxide .
(2)
A first agent containing an acidic substance and a second agent containing a metal oxide and / or a metal hydroxide that form a neutralizing salt with the acidic substance are not mixed, and the first agent and the first agent The cosmetic according to claim 1, wherein at least one of the two agents contains water .
(3)
The cosmetic according to claim 1 or 2 , wherein the metal oxide and / or metal hydroxide that reacts with an acidic substance to form a neutralized salt is zinc oxide and / or magnesium oxide.
(4)
The cosmetic according to any one of claims 1 to 3 , wherein the acidic substance is citric acid and / or a salt thereof.
(5)
The cosmetic according to any one of claims 1 to 4 , which is a pack.
6.
The cosmetic according to any one of claims 1 to 5 , wherein the cosmetic is foamed without using gas at the time of use .
7.
The cosmetic according to any one of claims 1 to 6 , wherein the cosmetic has a warm feeling when used.

[0005]
[Means for solving the problem]
The present inventors, in view of such circumstances, and generates a sufficient and appropriate amount of heat, seeking cosmetic having a pleasant warming a result of extensive research efforts, and an acidic substance, and said acidic substance A form in which metal oxides and / or metal hydroxides that form a neutralization salt are mixed and reacted at the time of use.
Such characteristics were found in the cosmetics of the present invention, and the invention was completed. Hereinafter, the present invention will be described in detail focusing on embodiments.

[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
(1) Metal oxide and / or metal hydroxide which is an essential component of the cosmetic of the present invention. The cosmetic of the present invention is a metal oxide and / or metal hydroxide that undergoes a neutralization salt-forming reaction with an acidic substance described below. It is characterized by containing a substance . Examples of such a metal oxide and / or metal hydroxide include amphoteric metal oxides and metal hydroxides. Here, the amphoteric substance means a metal oxide and / or hydroxide, which reacts with an acid and a base to form a salt, for example, aluminum hydroxide, aluminum oxide, and hydroxide. Examples include zinc and zinc oxide . In the present invention, magnesium oxide, magnesium hydroxide and the like can also be preferably used . Particularly preferred among these are zinc oxide and / or magnesium oxide, which have been used for many years in the field of cosmetics, and zinc oxide is particularly preferred for the two. This is because the safety in use has already been confirmed by the use results. The zinc oxide used in the present invention is not particularly limited as long as it is generally used in cosmetics, but is preferably a fine particle of 1 μm or less in view of heat generation characteristics. This is because the surface area is large and the reaction proceeds smoothly, so that an appropriate temperature can be obtained. In the cosmetic of the present invention, the preferred content of the metal oxide and / or metal hydroxide that reacts with an acidic substance to form a neutralized salt is 1 to 20% by weight in the form immediately before use. , More preferably 5 to 15% by weight. This is because if the amount of the amphoteric substance is too small, the amount of generated heat may not be sufficient, and if the amount is too large, the substance may become too hot. A comfortable amount of heat can be obtained in the above range.

(2) Acidic substance which is an essential component of the cosmetic of the present invention The cosmetic of the present invention contains, as an essential ingredient, an acidic substance which forms a neutralizing salt with the above-described metal oxide and / or metal hydroxide. . As the acidic substance that can be used in the present invention, any substance can be used without particular limitation as long as it reacts with the metal oxide and / or metal hydroxide to form a salt. Preferred examples include a solution of an acid and / or a salt and a solution of citric acid and / or a salt thereof. Among them, it is particularly preferable to use citric acid and / or a salt thereof or a solution thereof because the expression of stimulus is extremely small. Also, by using citric acid and / or its salt , the generation of heat can be controlled to a comfortable level. The preferred content of these acidic substances in the cosmetic of the present invention is 1 to 10% by weight, more preferably 2 to 8% by weight, in the form immediately before use. If the amount is too small, the amount of heat generated may be too small and the comfort may not be exhibited.If the amount is too large, the heat may be too hot or the irritation due to the excessive acid may occur, so the above range is preferable. It is.

(3) Cosmetic of the present invention The cosmetic of the present invention is characterized in that it contains the acidic substance and the metal oxide and / or metal hydroxide in such a form that a neutralization salt forming reaction does not occur. . This, for example, when both you are mixed in solution form, would be occurred neutralized salt-forming reaction prior to use, without heat during use, is not be obtained warming sensation. Therefore, the cosmetic of the present invention is a multi-part type cosmetic comprising at least two agents, and takes a form in which these components are uniformly mixed and used at the time of use. Examples of such a form include: 1) a method in which an acidic substance and a metal oxide and / or a metal hydroxide are present in a dosage form without water, and a water-containing composition is added at the time of use; The acidic substance and the metal oxide and / or metal hydroxide are contained in separate dosage forms, and these dosage forms are mixed and used at the time of use (however, one or both of the moisture forms may be used). Exist.) And the like. As a convenience of use, it is a two-part form comprising two types of compositions of a first part containing an acidic substance and a second part containing a metal oxide and / or a metal hydroxide . A form in which at least one is an aqueous solution is particularly preferable because a reaction occurs promptly in the whole composition. Further, as the cosmetics, any cosmetics which require or have a warm feeling effect can be applied without any particular limitation, and pack cosmetics and massage cosmetics can be suitably exemplified. Among them , pack cosmetics are particularly preferred. Further, as a pack cosmetic, a foam-like cosmetic is particularly preferable as an application target of the present invention because of its high heat insulating effect. In terms of environmental administration, a non-gas type is more preferable. As such a non-gas type, a dosage form which generates a carbon dioxide gas by mixing a carbonate and an acidic component at the time of use can be preferably exemplified.

The cosmetic of the present invention may contain, in addition to the essential components described above, optional components usually used in cosmetics. Examples of such optional components include hydrocarbons such as squalane, petrolatum and microcrystalline wax, jojoba oil, carnauba wax, esters such as octyldodecyl oleate, triglycerides such as olive oil, tallow, coconut oil, and stearic acid. Oleic acid, fatty acids such as ritinoleic acid, higher alcohols such as oleyl alcohol, stearyl alcohol, octyl dodecanol, anionic surfactants such as sulfosuccinates and sodium polyoxyethylene alkyl sulfate, and amphoteric surfactants such as alkyl betaine salts Agents, cationic surfactants such as dialkylammonium salts, sorbitan fatty acid esters, fatty acid monoglycerides, polyoxyethylene adducts thereof, polyoxyethylene alkyl ethers, polyoxyethylene fats Nonionic surfactants such as acid esters, polyhydric alcohols such as polyethylene glycol, glycerin and 1,3-butanediol, thickening / gelling agents, antioxidants, ultraviolet absorbers, coloring agents, preservatives, Powders and the like can be preferably exemplified . Among these optional components, particularly preferred are polyhydric alcohols such as glycerin, polyethylene glycol, 1,3-butanediol, dipropylene glycol, and diglycerin, which generate heat when mixed with water. And polyethylene glycol having an average molecular weight of 100 to 600 is particularly preferable. The preferred content is 30 to 70% by weight, more preferably 40 to 60% by weight in the form immediately before use. Further, in the non-gas type cosmetic composition of the above-mentioned reaction type of a carbonate and an acidic component, a carbonate such as sodium carbonate or sodium hydrogencarbonate is contained in an amount of 0.5 to 10% by weight, more preferably 1 to 5% by weight. It is particularly preferred to do so. The cosmetic of the present invention can be produced by treating these essential components and optional components according to a conventional method.