JPS632934B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] 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, combined with the body's condition at the time of bathing, warm the body and improve blood circulation. It is used for purposes such as promoting blood flow in peripheral blood vessels and increasing metabolism, and smoothing the skin by its 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 bath water. 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. [Problems to be Solved by the Invention] Bath additives containing the above-mentioned inorganic salts do not blend well with sebum and are poorly absorbed into the skin because the inorganic salts are water-soluble, resulting in insufficient medicinal efficacy. Therefore, the present inventors focused on the fact that tocopherols or derivatives thereof are oily and therefore easily absorbed into the skin by blending into sebum, and investigated a method for producing bath additives containing tocopherols or derivatives thereof as a main component. However, since these chemicals are oil-soluble, the surfactant added to dissolve them in the bath water causes foaming on the surface of the bath water.
In addition, a scale-like floating substance peculiar to tocopherols or derivatives thereof is generated, which significantly reduces the commercial value of the product as a bath additive. [Means for Solving the Problems] The present invention is the result of intensive research aimed at obtaining a bath additive containing tocopherol or its derivative without solubilization of tocopherol or its derivative, resulting in foaming, and generation of scale-like suspended matter. By combining a nonionic surfactant with a nonionic alkyl cellulose or its derivatives, the above-mentioned difficulties can be overcome, and various problems caused by peripheral blood circulation disorders such as numbness of the hands and feet and coldness caused by tocopherols or their derivatives can be solved. The present invention has been completed by discovering that a good bathing agent can be obtained which provides the effect of contributing to the improvement of symptoms etc. to the body through skin absorption during bathing. The present invention is a bath additive which is easily soluble in bath water and does not produce foaming or scale-like suspended matter, which is prepared by blending tocopherol or its derivative with a nonionic surfactant and a nonionic alkyl cellulose or its derivative. The tocopherol used in the present invention is generally referred to as vitamin E, 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 nonionic 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 surfactants. In the present invention, any of these nonionic surfactants can be used, but HLB of 15 or more, preferably 17
-18 are preferable 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 The effect of the present invention can be sufficiently exhibited by blending the culture medium in an amount (weight) of 5 to 0.2. In addition to the above-mentioned tocopherols, tocopherol derivatives, nonionic surfactants, nonionic alkyl celluloses or derivatives thereof, the bath additives of the present invention include ingredients commonly used in 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 bathwater by conventional methods. [Example] Next, an example of the bath additive of the present invention will be given. Example 1 dl-α-tocopherol acetate 0.4g, polyoxyethylene nonyl phenyl ether (HLB17.8)
Mix 0.3g and 3.0g 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 above mixture is sprayed to obtain 100 g of a powdered product. Example 2 Mix 0.75 g of dl-α-tocopherol, 0.2 g of polyoxyethylene lauryl ether (HLB17.7), and 3.5 g of fragrance in a mixer to prepare a mixed solution. Sodium sulfate 30.0g, lactose 64.35g, pigment 0.2
g and 0.5 g of methylcellulose are mixed with a small amount of water, 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. [Effects of the Invention] The bath additive of the present invention is easily soluble in bath water, and does not generate foam or scale-like suspended matter in bath water even after being dissolved in bath water. This effect was confirmed by the bath additives of the present invention (products of Examples 1 and 2) and the product manufactured in the same manner as in Example 1 and using the same amount of carboxymethylcellulose instead of the hydroxypropylmethylcellulose 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 a product manufactured in Example 1 by excluding hydroxypropyl methylcellulose (Comparative product 3) The table below shows the results of observing the foaming and presence of scale-like suspended matter when 10 g of each product was added to 180 ml of bath water.

【table】

[Table] As described above, even when the bath additive of the present invention is added to bath water 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 the bath additive, 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 numbness in the hands and feet, coldness, etc. 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.