JPH11246391A - Bath preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bath preparation having high dispersibility of zinc oxide in bath water and affording excellent refreshment feeling by including zinc oxide having a specific particle diameter. SOLUTION: This bath preparation is obtained by including zinc oxide having a particle diameter of 0.01-0.1 μm. The zinc oxide can be included at, preferably, 1.0-10.0 wt.% in the bath preparation. This bath preparation can be used in the form of, e.g. powder, granules, solid, gel, sol, liquid, foam, aerosol and spray. Furthermore, this bath preparation can be compounded with inorganic salt(s) (e.g. sodium chloride, potassium chloride), an organic acid (e.g. malic acid, citric acid), an oily component (e.g. rice-bran oil, olive oil), a polymeric substance (e.g. carboxymethylcellulose, dextrin), medicament(s) (e.g. di-menthol, methyl salicylate), crude drug(s) (e.g. glycyrrhiza, Japanese valerian), a moisturizing agent (e.g. peach, dishcloth gourd), enzyme(s) (e.g. trypsin, α- chymotrypsin) and others.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to providing a bath agent having high dispersibility of zinc oxide in bath water and excellent refreshing feeling.

[0002]

2. Description of the Related Art Zinc oxide is conventionally known as one of the components of a bathing agent having an astringent action. However, zinc oxide is insoluble in water, and when added as a powder to a bath agent, tends to agglomerate, making it difficult to uniformly disperse and diffuse in bath water, settling at the bottom of the bath, or floating on the surface of the bath. There was a problem such as

[0003] Studies have been made to improve such problems and enhance the dispersibility of zinc oxide in bath water. For example, the surface is coated with a water-soluble polymer such as dextrin and carrageenan. It is known that the dispersibility is improved.

[0004]

However, when the surface of zinc oxide is coated with a water-soluble polymer as described above, the processing is complicated, and if the coating is insufficient, the dispersion is poor. There was a problem. Therefore, the present invention provides a bath agent excellent in refreshing feeling by containing zinc oxide having high dispersibility in bath water, which does not require complicated processing.

[0005]

Means for Solving the Problems As a result of extensive studies to solve the above problems, the present inventors have found that the particle size of zinc oxide contained in the bath agent is 0.01 to 0.1 μm, The present invention has been found that sufficient dispersion in bath water can be obtained without using a dispersant such as a surfactant, and thereby an excellent refreshing feeling can be obtained.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The particle size of zinc oxide in the present invention means an average particle size, and all of the particle sizes used are not limited to this range. For example, when a particle size of 0.02 μm is used, zinc oxide having a particle size belonging to a range of about ± 50% may be used since there is actually a certain degree of particle size distribution. However, the particle size of the zinc oxide used is 0.1μ
If it exceeds m, a particle size distribution in which a large amount is contained is not preferred since precipitation in the bath water starts to occur. Also, when the particle size is extremely fine, for example, when the particle size is further finer than 0.01 μm, when the powder is used, the powder may float on the surface of the bath water, or may be injected during production or into the bath water. It is not appropriate because it sometimes flies.
The zinc oxide of the present invention contains 0.1 to 20.
0% by weight, preferably 1.0 to 10.0% by weight.

The bathing agent which can be applied to the present invention is not particularly restricted but includes, for example, conventionally known powders,
Examples thereof include granules, solids, gels, sols, liquids, foams, aerosols, and spray-type ones, which are obtained by appropriately combining the following exemplified components.

Examples of the inorganic salts include chlorides such as sodium chloride, potassium chloride and ammonium chloride: sodium carbonate, calcium carbonate, magnesium carbonate, heavy magnesium carbonate, sodium hydrogen carbonate, sodium sesquicarbonate and the like: sodium sulfate Sulfates such as aluminum sulfate, iron sulfate, sodium thiosulfate, potassium thiosulfate and sodium hyposulfite: nitrates such as sodium nitrate, potassium nitrate and calcium nitrate: phosphoric acids such as sodium phosphate, sodium polyphosphate and calcium hydrogen phosphate Salts: Sulfides such as sulfur, sodium sulfide, potassium sulfide, and iron sulfides: Silicon compounds such as silicic anhydride, metasilicic acid, mica powder, and neutral clay: hydroxides such as sodium hydroxide and calcium hydroxide: other Also, borax, boric acid, Of calcium, potassium bromide,
Potassium permanganate, artificial callus salts, mineral springs, mineral sands,
Such as Hananoyu

Examples of the organic acid include malic acid, citric acid, succinic acid, fumaric acid, tartaric acid, pyrrolidone carboxylic acid and the like.

The oil component includes, for example, bran oil, olive oil, soybean oil, liquid paraffin, white petrolatum, stearyl alcohol, myristic acid, lauric acid, palmitic acid, monoglyceride, triglyceride, rice bran extract, etc.

Examples of the high-molecular substance include carboxymethylcellulose, dextrin, casein, egg yolk powder, skim milk powder, rice bran, and the like.

As the drugs, for example, d1-menthol, 1-menthol, d-camphor, d1-camphor,
Methyl salicylate, salicylic acid, sodium salicylate, benzoic acid, etc.

Examples of crude drugs include licorice, valerian, chamomile, gypsophila, campi, fennel, keikai, keihi, keihi oil, ginger powder, jasmine, senkyu, shobu, shobu oil, sojutsu,
Terpin oil, cockscomb, spruce, spruce, spruce oil, dokakatsu, juniper, juniper, cypress oil, pine oil, mint leaf, peppermint oil, bergamot oil, pineapple oil,
Lavender oil, Ryuno, Ogon, saffron, carrot, Oubak extract, Koboku, Peonies, Sanshin, Bakuryo, Peach, Loofah, Aloe, Cuckon, etc.

Examples of the humectant include plant extracts such as peach, loofah and aloe, 1,3-butylene glycol,
Sorbitol, glucose, sucrose, etc.

Examples of the enzymes include trypsin, α-chymotrypsin, promelain, papain, protease, proctase, serathiopeptidase, lysozyme, and the like.

As other components, for example, nicotinic acid derivatives, glycyrrhizinate and its derivatives, glycyrrhetinate and its derivatives, vitamins (B, C,
E, tocopherol, etc.), paraoxybenzoate, isopropylmethylphenol, etc.

Examples of the fragrance include natural fragrances such as lavender oil, jasmine oil, and lemon oil: artificial fragrances such as geraniol, citronellal, eugenol, undecalactone, limonene, and phenethyl alcohol; The resulting blended spices,

As the dye, for example, Blue No. 1, Red 10
No. 6, Red No. 2, Yellow No. 4, Green No. 3, etc. Tar Dyes Dyes in Tables I and II: Natural dyes recognized as food additives such as chlorophyll, riboflavin, and annatto

Examples of the pigment include titanium oxide, talc, red iron oxide, yellow iron oxide, magnesium silicate, mica, mica, titanium, calcium carbonate, magnesium carbonate, titanium dioxide, silicic anhydride, and coated particles (granules) thereof. ,

Examples of the whitening agent include vitamin E phenylate, vitamin C and its derivatives, ellagic acid, kojic acid, α-hydroxy acid and the like. If necessary, for example, a surfactant such as sodium alkyl sulfate, polyoxyethylene alkyl ether, lauric acid diethanolamide, or polyethylene glycol monostearate may be blended.

Further, these components can be used by being held (accommodated) in microcapsules formed of a known substance such as gelatin or a polymer. In addition, a foaming type bath agent combining an organic acid and a carbonate can be used. In this case, for example, a ratio of the carbonate is 20 to 40% by weight with respect to the organic acid 10 to 30% by weight, What is necessary is just to mix with other components and a base material.

[0022]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Test Example 1 Bath agents containing zinc oxide having different particle diameters shown in Table 1 (Examples 1 to 4) were produced, and 1 g of the bath agent was poured into 500 ml of hot water (about 40 ° C.) for 20 minutes. The condition of the hot water was visually checked. The result is ×, where zinc oxide precipitation was observed,
Table 1 shows that the particles were dispersed in the hot water and no precipitation or floating was observed.

[0024]

[Table 1]

Test Example 2 The feeling of use of the bath agent containing zinc oxide of the present invention was evaluated by a monitor test by the following method. A bath preparation having the formulation shown in Table 2 was prepared, and 30 g of the bath preparation was added to a bath water at 40 ° C.
Then, the monitor was bathed for 10 minutes per monitor, and the feeling after that was evaluated on a five-point scale from (5) to exhilarating (1). The monitors were 20 persons each, and the average value is shown in Table 2 as a result. As a result of the test, a remarkable improvement in refreshing sensation was recognized as compared with the case of using alum, which also has a refreshing effect.

[0026]

[Table 2]

Formulation Examples As Examples 6 to 11, bathing agents of the present invention described in Tables 3-1 and 3-2 were prepared.

[0028]

[Table 3]

[0029]

According to the present invention, the particle size of zinc oxide is set to 0.01 to
By adding 0.1 μm to the bath additive, high dispersibility of zinc oxide in bath water can be obtained. Thereby, an excellent refreshing feeling after bathing can be obtained.

Claims (1)

[Claims] 1. A bath agent containing zinc oxide, wherein the particle size of the zinc oxide is 0.01 to 0.1 μm.