JPS61277609A - Bathing agent - Google Patents

Abstract

PURPOSE:A bathing agent free from foaming and scale-like suspension, blending a bathing agent containing tocopherol or its derivative as an active ingredient with an anionic surface active agent and a nonionic alkyl cellulose or its derivative. CONSTITUTION:Tocopherol or its derivative (preferably tocopheryl acetate) is blended with preferably 5-0.2 times as much as a nonionic surface active agent (e.g., polyoxyethylene alkyl ether, etc., having preferably >=15 HLB, especially 17-18) and a nonionic alkyl cellulose or its derivative (e.g., hydroxymethylpropylmethyl cellulose, etc.) to give a bathing agent. EFFECT:Tocopherol or its derivative contributes improvement in symptoms of peripheral blood circulation disorder, etc., and is easily soluble in warm water.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bath additive containing tocopherol or a derivative thereof as an active ingredient.

(Conventional technology) Bath additives are placed in a bathtub when taking a bath, and the ingredients contained in the bath additives are eluted into the bath water.The ingredients combine with the physical condition of the body at the time of bathing to warm the body and improve blood circulation. It is used for the purpose of increasing metabolism by promoting blood flow in peripheral blood vessels, and smoothing the skin by keratin softening effect on the skin surface.

Currently, such bath additives are in the form of powder, granules, tablets, etc., and are transparent and dissolve in the bath. and,
Inorganic salts such as sodium carbonate, sodium chloride, and sodium sulfate are mainly used as medicinal ingredients for this purpose, and also serve as excipients.

[Problem that the invention seeks to solve]

Bath additives containing the above-mentioned inorganic salts have insufficient medicinal efficacy because the inorganic salts are water-soluble and do not mix well with sebum and are poorly absorbed into the skin.

Therefore, the present inventors focused on the fact that tocopherol or a derivative thereof is oily and therefore easily absorbed into the skin by blending into sebum, and investigated a method for producing a bath additive containing tocopherol or a derivative thereof as a main component. However, because these compounds are oil-soluble, the surfactant added to dissolve them in the bath causes foaming on the bath surface, and also produces scale-like suspended matter peculiar to tocopherols or their derivatives, making them difficult to use as bath additives. There were drawbacks that significantly reduced its commercial value.

[Means for solving problems]

The present invention was developed as a result of extensive research aimed at obtaining bath additives containing tocopherol or its derivatives that do not cause the solubilization of tocopherol or its derivatives, the resulting foaming, and the formation of scale-like floating substances. In combination with alkyl cellulose or its derivatives, the above-mentioned problems can be resolved, and the effect of tocopherol or its derivatives, which contributes to the improvement of various symptoms caused by peripheral blood circulation disorders such as numbness of the limbs and coldness of the hands and feet, can be achieved by bathing. The present invention has been completed based on the discovery that a good bath additive can be obtained through skin absorption.

The present invention is a bath additive which is easily soluble in baths and does not produce foaming or scale-like suspended matter, which is made by blending tocopherol or a derivative thereof with a nonionic surfactant and a nonionic alkyl cellulose or a derivative thereof.

The tocopherol used in the present invention is generally referred to as vitamin ε, and is a transparent, viscous, oily substance with a yellow to tan color, and is almost insoluble in water.

Further, tocopherol derivatives include tocopherol acetate, tocopherol succinate, and the like.

In particular, tocopherol acetate is a colorless to yellow, transparent, viscous substance that is almost insoluble in water.

In the present invention, both tocopherol and tocopherol derivatives can be used, but tocopherol acetate is preferred in terms of stability.

The nonionic surfactants used in the present invention include known surfactants such as ether type such as polyoxyethylene alkyl ether, ether ester type such as polyoxyethylene sorbitan fatty acid ester, and ester type such as polyoxyethylene fatty acid ester. Examples include nonionic surfactants. In the present invention, any of these nonionic surfactants can be used, but HLB of 15 or more is preferable.
Those with numbers 17 to 18 are suitable because they can be added in small amounts in the bath additive composition.

The nonionic alkylcellulose or its derivatives used in the present invention include alkylcellulose in which a portion of the hydroxyl groups of cellulose are alkyl etherified, such as methylcellulose and ethylcellulose, or alkylcellulose in which a portion of the hydroxyl groups of cellulose are alkyl etherified, such as methylcellulose and ethylcellulose. Examples include hydroxypropyl methyl cellulose in which a portion of the remaining hydroxyl groups that have not been etherified are substituted with other substituents, such as hydroxyalkyl groups.

In the bath additive of the present invention, the blending ratio of the nonionic surfactant and the nonionic alkylcellulose or alkylcellulose derivative to the tocopherol or tocopherol derivative can be changed as appropriate depending on other ingredients in the formulation, but generally each 5 to 0.2 times the amount (the effects of the present invention can be fully exhibited by blending in a heavier amount).

The bath additives of the present invention include the above-mentioned tocopherols, tocopherol derivatives, nonionic surfactants, nonionic alkyl celluloses or their derivatives, and other ingredients commonly used as bath additives, such as inorganic salts such as sodium carbonate, sodium chloride, and sodium sulfate. Add fragrances, pigments, etc. as appropriate depending on the usage situation.

The amount of tocopherol or tocopherol derivative in the bath additive of the present invention is not particularly limited, but it is preferably about 0.4 to 1%.

The bath additives of the present invention can be formulated into various forms such as powder, tablets, and granules that can be easily added to baths by conventional methods.

〔Example〕

Next, examples of the bath additives of the present invention will be given.

Example 1 0.4 g of df-α-tocopherol acetate, polyoxyethylene nonylphenyl ether (HLB 17.8
) and 3.0 g of fragrance in a mixer to prepare a mixed solution.

95.6 g of powdered sodium sulfate, 0.5 g of hydroxypropyl methylcellulose, and 0.2 g of pigment are placed in a mixer, and while mixing is continued, the mixture is sprayed to obtain 100 g of a powdered product.

Example 2 dIt-α-tocopherol 0.75 g, polyoxyethylene lauryl ether (HLB 17.7) 0.
2 g and 3.5 g of fragrance are mixed in a mixer to prepare a mixed liquid.

Sodium sulfate 30.0 g, lactose 64.35 g,
A small amount of water is added to 0.2 g of the dye and 0.5 g of methyl cellulose, and the mixture is kneaded, granulated into pellets with a diameter of 1 mm using an extrusion granulator, and dried. Next, this is put into a pot mixer, and the above mixed liquid is sprayed while rotating to obtain 100 g of a granular product.

〔Effect of the invention〕

The bath additive of the present invention is easily soluble in a bath, and does not produce foam or scale-like suspended matter in bath water even after being dissolved in a bath.

This effect was confirmed by comparing the bath additive of the present invention (product of Example 1.2) with the product manufactured in the same manner as in Example 1 and using the same amount of carboxymethyl cellulose instead of the hydroxypropyl methyl cellulose of Example 1 (Comparative Example 1). ), a product using the same amount of polyvinyl alcohol instead of hydroxypropyl methylcellulose in Example 1 (comparative product 2), and Example 1
In the production of hydroxypropyl methyl cellulose, a product (comparative product 3) was produced, and 10 g of each product was added to bath water 1801, and the results were observed for foaming and the presence or absence of scale-like suspended matter. Shown in the table below.

table In the table, no foaming or scale-like floating matter was observed.

+: Foaming or scale-like floating matter was observed.

As described above, even when the bath additive of the present invention is poured into a bathtub during bathing, there is no foaming during bathing, there is no scale-like floating matter, and there is no discomfort. Furthermore, tocopherol or its derivatives, which are ingredients in doujin bath additives, are eluted and absorbed through the skin of the human body during bathing, exerting the peripheral vasodilation and blood circulation promoting effects of tocopherol in the body, causing symptoms such as numbness in the limbs and coldness. It contributes to the prevention of various symptoms caused by peripheral blood circulation disorder and aging in middle age.

Claims (1)

[Scope of Claims] 1. A bath additive comprising tocopherol or a derivative thereof, a nonionic surfactant, and a nonionic alkyl cellulose or a derivative thereof. 2. The bath additive according to claim 1, wherein the tocopherol derivative is tocopherol acetate. 3. The bath additive according to claim 1, wherein the nonionic alkylcellulose or its derivative is methylcellulose or its derivative.