JPH0825867B2 - Bath additive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bath agent having a significantly improved skin care effect.

[Conventional technology]

Bathing has various effects such as cleansing the body, warming not only limbs but also the core, and relaxing mentally, and is an essential activity in daily life.

On the other hand, many people complain of the loss of oil content from the skin due to bathing, especially the bulkiness of the skin after bathing in the winter. And
Currently, such people usually use various skin care products such as lotions and creams after bathing in order to suppress the bulkiness of the skin after bathing. But,
When using a skin care product, it takes labor to apply it, and it is difficult for an old man to apply the skin care product to every corner of his body.

Therefore, in bathing agents, investigations have been made to solve the above problems, and addition of oil or moisturizing agent has been performed in bathing agents. By using such a bathing agent, skin care during bathing can save the labor of applying lotion, cream or the like, and the whole body can be the target of care.

[Problems to be Solved by the Invention]

However, even when using a bath additive containing an oily component such as oil, the skin care effect is insufficient, or a bath additive containing an oily component in an amount sufficient to exert its addition effect is used. In this case, there is a problem in that the oily component remains on the skin more than necessary after taking a bath, resulting in a particular sticky feeling.

Therefore, an object of the present invention is to provide a bathing agent which exhibits a sufficient skin care effect without adding an excessive amount of an oily component so as to cause the above problems.

[Means for solving the problem]

As a result of intensive studies, the inventors of the present invention have found that by adding a specific ester as an oily component, a bathing agent that achieves the above object, that is, a bathing agent with significantly improved skin care effect can be obtained. I found out.

The present invention has been made based on the above findings, and provides a bath salt containing a difatty acid glycerin ester as an oil component.

 Hereinafter, the bath agent of the present invention will be described in detail.

The difatty acid glycerin ester used in the bath agent of the present invention preferably has a melting point of 30 ° C. or higher. These are esterification of glycerin and fatty acids,
Glycerolization of glycerin and natural animal and vegetable oils and fats or hardened natural animal oils and fats, or fatty acid glycerin ester (diester content 50% or more) obtained by a general production method such as glycerollysis of higher fatty acid lower alcohol ester and glycerin is subjected to molecular distillation, It is obtained by separating and purifying by solvent extraction or the like. Of these, one or two diglycerin esters of fatty acids such as 2-ethylhexanoic acid, myristic acid, oleic acid, and isostearic acid are particularly preferable.

Further, as the oil component other than the difatty acid glycerin ester used in the bath salt of the present invention, oils and fats, waxes, hydrocarbons, higher fatty acids, higher alcohols,
Examples thereof include esters, silicone oils, keratinocyte lipids and similar structural substances thereof, and keratinocyte lipids are particularly preferable from the viewpoint of skin care effect.

Examples of the inter-keratinocyte lipids include, for example, ceramide,
Examples thereof include sugar ceramide, cholesterol, fatty acid, and cholesteryl ester, and among them, ceramide, sugar ceramide, and cholesteryl ester are preferable. These may be those extracted from natural products such as mammalian brain tissue or those obtained by synthesis.

Examples of the cholesteryl ester include cholesteryl esters of saturated or unsaturated straight chain or branched chain fatty acids having 8 to 20 carbon atoms, and among them, monomethyl branched fatty acid cholesteryl ester is preferable.

Further, a preferable example of the substance having a similar structure to the interkeratinocyte lipids is a substance having a similar structure to ceramide.

A substance having a similar structure to ceramide is a lipid derivative having two long-chain hydrocarbon groups and an OH group and an amide group between them, and the molecule can have a one-dimensional conformation. To tell. Examples of such compounds include the following general formula (I)
What is represented by.

(In the formula, R ¹ represents a linear or branched saturated or unsaturated hydrocarbon group having 10 to 26 carbon atoms, and R ² represents 9 to 25 carbon atoms.
Represents a long-chain or branched-chain saturated or unsaturated hydrocarbon group. Further, examples of the oily component other than the above used for the bath salt of the present invention include the following.

・ Fats and oils Natural oils and fats such as soybean oil, bran oil, jojoba oil, avocado oil, almond oil, olive oil, cacao oil, sesame oil, persic oil, castor oil, coconut oil, mink oil, beef tallow, lard, etc.,
Hardened oils obtained by hydrogenating these natural fats and oils and synthetic triglycerides such as glyceride myristic acid and glyceride 2-ethylhexanoate.

・ Waxes Carnauba wax, whale wax, beeswax, lanolin, etc.

-Hydrocarbons Sulfate paraffin, petrolatum, paraffin microcrystalline wax, ceresin, squalane, pristane, etc.

Higher fatty acids Lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, lanolinic acid, isostearic acid, etc.

Higher alcohols Lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, cholesterol, 2-hexyldecanol, etc.

-Esters myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate,
Decyl oleate, etc.

The above oily components may be used alone or in combination of two or more.

Compounding ratio (weight ratio) of the difatty acid glycerin ester and the other oily component in the bath agent of the present invention
Is preferably the former: the latter = 1: 1 to 1:50.

The amount of the difatty acid glycerin ester blended is
In 100 parts by weight of bath agent (all composition components), preferably 0.1 to 50
In the case of using keratin intercellular lipids and / or its structurally similar substances as other oily components, 0.1 to 20 times as much as other oily components (by weight), particularly 0.1 to
It is preferable to blend in a range of 10 times.

In the bath salt of the present invention, if necessary for the essential components,
Furthermore, by adding a dispersant or emulsifier of an oily component, such as a water-soluble polymer or a surfactant, when the bathing agent is dissolved in the bath water, the oily component does not float on the water surface, and the bath water becomes cloudy, A 0.01% by weight aqueous solution having a transparency of 40 cm or less, preferably 20 cm or less can give a high-class image of a milk bath.

As the water-soluble polymer, sodium alginate,
Alginic acid propylene glycol ester, gum arabic, xanthan gum, pectin, tragacanth, sodium carboxymethylcellulose, methylcellulose, carboxyvinyl polymer, polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, milk protein, soy protein, gelatin, egg protein, sodium caseinate, whey protein, etc. However, gum agents such as gum arabic and xanthan gum and water-soluble proteins such as casein sodium and whey protein are preferable.

Further, as the above-mentioned surfactant, any of anionic, cationic, nonionic, natural and synthetic surfactants can be used.

The dispersant or emulsifier for these oily components is preferably blended in an amount of 5 to 100 parts by weight based on 100 parts by weight of the oily components in the bath additive.

The bath additive of the present invention may be further blended with the following known bath additive raw materials which are commonly used in bath additives.
The bath agent raw materials that can be blended are not limited to those exemplified.

(A) Inorganic salts Sodium chloride, sodium hydrogen carbonate, sodium carbonate, borax, sodium sulfate, sodium sulfide, sodium sesquicarbonate, sodium nitrate, sodium thiosulfate, sodium polyphosphate, sodium phosphate, calcium oxide, magnesium oxide, carbonic acid Calcium, magnesium carbonate, potassium chloride, potassium sulfide, etc.

(A) Inorganic acids Boric acid, metasilicic acid, silicic anhydride, etc.

(C) Organic acids Succinic acid, fumaric acid, malic acid, tartaric acid, citric acid,
Benzoic acid, etc.

(D) Crude herbs such as fennel, oyster, chamomile, cinnamon, safflower, peony, ginger, iris, ginkgo, gall, chinpi, soup, valerian, juniper, spruce, lightly-loaded, carrot, etc.

(E) Pigments: Tar dyes such as Yellow No. 4, Blue No. 1, Yellow No. 202 (1) and other tar dyes specified by Ordinance of the Ministry of Health and Welfare, food additives such as chlorophyll, riboflavin, crocin, safflower, anthraquinone Natural pigments that are recognized as products.

(F) Vitamin vitamin A, vitamin C, vitamin D, vitamin E
etc.

(G) Fragrances (h) Others Sulfur, Yunohana, Mineral sand, Mica powder, Neutral clay, Rice bran, Fungicides, Preservatives and other necessary ingredients for formulation.

The bath salt of the present invention is prepared by adding the above-mentioned optional components to the above-mentioned essential components as necessary and mixing them. In this case, the content of the optional components is usually preferably 0 to 2000 parts by weight based on 100 parts by weight of the essential components of the bath salt of the present invention.

In addition, an appropriate amount of water, preferably about 50 to 500% by weight of the oily component, more preferably 100 to 400% by weight of water, is added to the bathing agent of the present invention prepared as described above to emulsify the emulsion. It can also be in the form. In addition to this, the bath agent of the present invention can be made into various dosage forms (forms) such as powder, granules, tablets, and liquids in the same manner as known bath agents.

In addition, the bathing agent of the present invention is used by pouring it into the bath water at the time of bathing, and in that case, the concentration of the oily component is usually 10 to 500 pp in the bath water.
It is preferable to determine the amount to be used once so that m, particularly 20 to 100 ppm.

〔Example〕

Examples of the present invention, comparative examples, and reference test examples will be shown below to specifically clarify the effects of the present invention.

Examples 1 and 2 and Comparative Example Bath agents were prepared according to the formulations shown in Table 1 below. Each of the prepared bath salts was used by 20 panelists in a conventional manner, and the overall evaluation as a bath agent (total feeling of use), the moist feeling and stickiness of the skin after bathing were examined for each bath agent. . The results are shown in Table 2 below.

Example 3 18 parts by weight of liquid paraffin, 2 parts by weight of 1-stearoyl 3-myristoyl glycerol, 10 parts by weight of gum arabic and 40 parts by weight of dextrin were added to 200 parts by weight of water and emulsified by a conventional method, and then the emulsion was spray-dried. (Spray drying) to obtain a powder. To this powder, 10 parts by weight of sodium sulfate and a trace amount of a coloring agent and a fragrance were added and mixed uniformly to obtain a bath agent having a usage amount of 30 g.

Reference Test Example Diffusivity of Difatty Acid Glycerin Ester on Skin 10 μl of each sample of liquid paraffin, jojoba oil, 2-ethylhexanoic acid triglyceride, 2-ethylhexanoic acid diglyceride, octanoic acid diglyceride was placed on the skin of the forearm of the subject. Each was left still using a micropipette and left for 5 minutes. For each sample (oil), carefully absorb the excess oil that did not diffuse on the skin, apply the fine paper to the oil-diffused skin, transfer the diffused oil to high-quality paper, and I wrote the outline quickly with a pencil. The contour of the transferred oil was transferred again onto another high-quality paper, the high-quality paper was cut out along the contour, and the weight thereof was precisely measured. This test was carried out on 7 subjects and the average weight value for each sample was measured. The results are shown in Table 3 below.

As is clear from the results shown in Table 3, the difatty acid glycerin ester has a good diffusibility on the skin.

〔The invention's effect〕

According to the bath agent of the present invention, the skin care effect can be remarkably improved without adding an excessive amount of an oily component.

Claims (2)

[Claims] 1. A bath agent containing a difatty acid glycerin ester as an oily component. 2. The bath salt according to claim 1, wherein the oily component contains keratin intercellular lipids.