JPH02115116A - Bathing agent - Google Patents

Abstract

PURPOSE:To obtain a bathing agent excellent in feeling of use by containing a specific oily ingredient and nonionic surfactant in a bathing agent containing a carbonate and acid blended therein and self-emulsifying the oily ingredient. CONSTITUTION:The objective substance obtained by blending an oily ingredient (e.g., cetyl octoate) containing >=60wt.% ester of a 6-10C fatty acid with a 12-20C alcohol and a nonionic surfactant (e.g., polyoxyethylene stearyl ether) consisting of an ester of a 14-22C alcohol oxyethylene adduct or 4-8C alcohol oxyethylene adduct with a 14-22C fatty acid in a bathing agent containing a carbonate and an acid blended therein without water. In 100 pts.wt. bathing agent, are blended 5-80 pts.wt. carbonate, 10-80 pts.wt. acid, 0.5-50 pts.wt. oily ingredient and 10-100 pts.wt. nonionic surfactant. The above-mentioned agent can be prepared in the form of a granule, tablet, liquid, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a bath additive, and furthermore, 3'p L This invention relates to a bath additive containing carbonate and acid that moisturizes the skin after bathing and provides a smooth feel during and after bathing.

[Problems to be solved by conventional techniques and inventions] Bathing cleanses the body, warms not only the limbs but also the body to the core,
It has various effects such as relaxing the mind, and is an essential activity in daily life.

On the other hand, many people complain of loss of oil from their skin due to bathing, and that their skin feels dry after bathing, especially in winter. Therefore, in order to suppress this dryness of the skin after bathing, it has been practiced to apply lotion, cream, etc. after bathing.

However, lotions and creams require time and effort to apply, and it is difficult for the elderly to apply them to every corner of their bodies.

In addition, bath additives have been produced with consideration given to solving the above-mentioned problems, and bath additives include the addition of oil or a preservative. By using such bath additives, taking care of your skin while taking a bath has the advantage of saving you the trouble of applying lotions, creams, etc., and allowing you to treat your entire body.

In order to suppress dryness of the skin after bathing, oil-based ingredients such as oil are effective, and oil lotus is an example of a bath additive containing oil-based ingredients such as oil. However, these bath additives float oily ingredients in the bathtub, and if you use a bath additive that has enough salt added to have the effect of suppressing skin dryness, the oily ingredients will be more than necessary. 1 on the skin
There was a problem that I-1, which I used, was not good because it was sticky when worn, and it also stained the bathtub, and the oily ingredients floated on the bathtub.

Therefore, in order to address the above-mentioned problem, a bath salt containing self-emulsifying oily ingredients has been proposed (Japanese Patent Laid-Open No. 61-17
6520 and Japanese Patent Application Laid-open No. 61227519).

However, bath additives that emulsify oily ingredients are insufficient in moisturizing the skin after bathing and providing a smooth feeling during and after bathing, and also have insufficient moisturizing effects after bathing.

In addition, these bath salts are filled in capsules or are liquids containing water, and do not take into account the effects of carbonates or carbon dioxide gas. When applied to bath additives, the emulsion stability deteriorates, and the floating of oily ingredients becomes noticeable when added to the bath.
There are problems in that it not only looks bad, but also has a sticky feel, which makes it uncomfortable to use.

Therefore, an object of the present invention is to provide a carbonate salt which does not cause oily components to float due to stable self-emulsification of oily components in a bath, moisturizes the skin after bathing, and provides a smooth feel during and after bathing. and an acid blended therein.

[Means for Solving the Problems] As a result of intensive research, the present inventors have found that a specific oily component and a specific nonionic surfactant can be used in a water-free bath additive containing carbonate and acid. It has been found that a bath additive containing the following achieves the above objectives.

The present invention was made based on the above findings, and in a bath additive containing a carbonate and an acid, an ester of a fatty acid having 6 to 10 carbon atoms and an alcohol having 12 to 20 carbon atoms is
selected from the group consisting of an oily component containing % or more of heavy buds, and an oxyethylene adduct of an alcohol having 14 to 22 carbon atoms, or an ester of an oxyethylene adduct of an alcohol having 4 to 8 carbon atoms and a fatty acid having 14 to 22 carbon atoms. type 1 or 2
The present invention provides a bath additive containing at least two types of nonionic surfactants.

Hereinafter, the bath additive of the present invention will be explained in detail.

In the bath additive of the present invention, the oily component contains 6 carbon atoms.
The essential component is an oil component containing 60% or more of an ester of a fatty acid of ~IO and an alcohol having 12 to 20 carbon atoms, and as such an ester, heptyl octoate is preferable. The oily components other than the above-mentioned esters are preferably those that are insoluble or sparingly soluble in water and are liquid or solid at room temperature.As liquids, those that are viscous and flammable are preferred.For example, the following: I can give you something like this.

(1) Oils and fats Natural oils and fats such as soybean oil, bran oil, jojoba oil, avocado oil, almond oil, olive oil, cacao butter, sesame oil, persic oil, castor oil, coconut oil, mink oil, beef tallow, pork fat, etc. Hydrogenated oils obtained by hydrogenating natural oils and fats, and synthetic triglycerides and diglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride.

(2) Waxes Carnauba wax, whale wax, beeswax, lanolin, etc.

(3) Hydrocarbons liquid paraffin, vaseline, paraffin, microcrystalline wax, ceresin, squalane, pristane, etc.

(4) Higher fatty acids lauric acid, myristic acid, palmitic acid, stearic acid, hehenic acid, oleic acid, linoleic acid, linuric acid,
lanolic acid, isostearic acid, etc.

(5) Higher alcohols lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol,
Cholesterol, 2-hexadecanol, etc.

(6) Ester myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, etc.

(7) Silicone oils The above-mentioned oily components may be used alone or in combination of two or more.
It can be used in combination with the above-mentioned ester, which is an essential oily component in the bath additive of the present invention.

Among the oily components used in the bath additive of the present invention, if the amount of the ester, which is an essential oily component, is less than 60% by weight,
Stable self-emulsification is not achieved.

The oily component used in the bath additive of the present invention has a concentration of preferably 2 to 500 ppm, particularly preferably 10 to 10 ppm, when the bath additive of the present invention is put into the bath.
It is preferable to determine the blending amount in relation to the one-time use amount (input amount) of the bath agent composition of the present invention so that the amount is 0 pp-. ,
It is preferably 0.5 to 50 parts by weight, particularly 1 to 30 parts by weight.

In addition, the nonionic surfactant used in the bath additive of the present invention is an oxyethylene adduct of an alcohol having 14 to 22 carbon atoms or an oxyethylene adduct of an alcohol having 4 to 8 carbon atoms and an oxyethylene adduct of an alcohol having 14 to 22 carbon atoms. or a mixture of two or more selected from the group consisting of esters with fatty acids, preferably polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, and polyoxyethylene sorbitol tetraoleate. One type or a mixture of two or more types, particularly preferably,
It is a mixture of the polyoxyethylene stearyl ether and the polyoxyethylene oleyl ether or polyoxyethylene sorbitol tetraoleate, and the mixing ratio (weight ratio) of the polyoxyethylene stearyl ether and polyoxyethylene oleyl ether is the same as the oil-based 0.5:9.5 to 9.5:0 depending on the polarity of the components
．． It is preferable to set it appropriately within the range of 5. The polyoxyethylene stearyl ether and the polyoxyethylene oleyl ether preferably have an added mole number (average value) of oxyethylene of 5 to 11.

In addition, as the polyoxyethylene sorbyltetraoleate, two types having different numbers of added moles of oxyethylene (average value) such as 30.40 and 60 may be used depending on the polarity of the oily component. In response to the,
A mixture of these in an appropriate ratio can be used. The polyoxyethylene sorbitol tetraoleate has an added mole number (average value) of oxyethylene of 10
~80 is preferred.

The blending amount of the nonionic surfactant is as follows:
00 parts by weight, preferably 10 to 100 parts by weight,
Particularly preferably 18 to 60 parts by weight.

Further, carbonates used in the bath additive of the present invention include sodium hydrogen carbonate, sodium sesquicarbonate, sodium carbonate, potassium hydrogen carbonate, ammonium hydrogen carbonate, magnesium carbonate, calcium carbonate, etc. can be used alone or in combination of two or more.

The blending amount of the above carbonate is 5 to 8 parts by weight in 100 parts by weight of the bath additive.
It is preferably 0 parts by weight, especially 10 to 50 parts by weight.

Further, as the acid used in the bath additive of the present invention, both organic acids and inorganic acids can be used, but water-soluble and solid acids are preferred. Examples of the organic acids include succinic acid,
Dicarboxylic acids such as glutaric acid, adipic acid, pimelic acid, and fumaric acid; acidic amino acids such as glutami 7M and aspartic acid; oxyacids such as malic acid, citric acid, and ascorbic acid; benzoic acid, pyrrolidone carboxylic acid, and these organic acids Examples include acid salts of acids. Further, examples of the above-mentioned inorganic acids include potassium dihydrogen phosphate, sodium sulfite, and the like. Among the acids mentioned above, in particular those of the formula: H
OOC-(C1i, ), -COO1+ (where n is 2
(representing an integer of 4 to 4) and fumaric acid are preferred.

The above acids are used alone or in combination of two or more,
The blending amount is preferably 10 to 80 parts by weight, particularly 15 to 50 parts by weight, per 100 parts by weight of the bath additive.

In addition to the essential ingredients listed in Item 110, the bath additive of the present invention may appropriately contain known raw materials for bath additives other than water, such as fragrances, herbal medicines, pigments, vitamins, etc., which are normally used in bath additives. can do. The blending amounts of these bath additive raw materials are as follows:
Usually, per 100 parts by weight of the essential ingredients of the bath additive of the present invention,
0 to 50 parts by weight is preferred.

The bath additive of the present invention, like known bath additives, can be made into various dosage forms (forms) such as granules, tablets, and liquids.

〔Example〕

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

Examples 1 to 3 and Comparative Examples 1 to 11 The bath additives of Comparative Examples 1 to 6 were prepared according to the formulations shown in Table 1 below, and the bath additives of Examples 1 to 13 were prepared according to the formulations shown in Table 3 below. Bath additives and Comparative Examples 7 to 11 were prepared, respectively.

In addition, each bath salt 1 composition of the above Examples and Comparative Examples has the form shown in Table-1 and Table-3, respectively, and the size (amount) of each is shown in Table-1 and Table-3. Usage amount (
g).

Test Example 1 In order to show that in the bath additive used in the present invention that does not contain the specific oily component and the specific nonionic surfactant, the oily component does not self-emulsify stably due to the presence of carbonate and acid. The following tests were conducted using the bath additives of Comparative Examples 1 to 6. The results are shown in Table 2 below.

The bath additives of each of the above comparative examples were placed in a bath (40°C) 150j2, and the liquid ones were stirred for 1 minute (φ), and the tablet ones were dissolved and stirred gently, and the floating state of the oily component was determined as follows. Based on r1!, it was evaluated by visual observation.

Me - Law component side trap Tai Feng Qin Gall No or almost no evaluation -----m-〇Slight lifting is seen-
------Δ Considerable floating is observed-----X Test Example 2 In order to investigate the floating state of the oily component, foaming, and opacification of the bath additives of the present invention, Examples 1 to The following tests were conducted using the bath additives of No. 13 and the bath additives of Comparative Examples 8 to 11. The results are shown in Table 4 below.

Pour each of the above bath additives into the bath (40"C) 150e, dissolve the bath additives, and stir gently.
Foaming and opalescence were evaluated as follows.

The floating state of the oily component was evaluated using the same evaluation criteria as in Test Example 1, and the foaming and opalescence were evaluated using the following evaluation criteria.

It is a somewhat unpleasant amount -----1 Δ, -1. −Once Evaluation amount −−−=−−○A long time ago
-=-111 Δlow
-------x Test Example 3 Regarding the bath additives of the present invention, in order to observe the smooth and moist feeling of the skin after bathing, the bath additives of Example 3 and the bath additives of Comparative Example 7 were used, and the following tests were conducted. A test was conducted. The results are shown in Table 5 below.

Each of the above bath additives was used by 50 panelists in a routine manner for 10 days, and the smoothness and moistness after bathing were examined.

Table [Effects of the Invention] According to the bath additive of the present invention, the oily ingredients do not float due to stable self-emulsification of the oily ingredients in the bath, and the skin is moisturized after bathing. It can give a smooth feel.

Table-5

Claims (3)

[Claims] (1) In a bath additive containing carbonate and acid, an oil component containing 60% by weight or more of an ester of a fatty acid having 6 to 10 carbon atoms and an alcohol having 12 to 20 carbon atoms, and an oily component having 1 carbon number
One or more nonionic substances selected from the group consisting of oxyethylene adducts of alcohols having 4 to 22 carbon atoms or esters of oxyethylene adducts of alcohols having 4 to 8 carbon atoms and fatty acids having 14 to 22 carbon atoms. Bath additives containing surfactants. (2) The bath additive according to claim (1), wherein the ester of a fatty acid having 6 to 10 carbon atoms and an alcohol having 12 to 20 carbon atoms is cetyl octoate. (3) A claim in which the nonionic surfactant is one or a mixture of two or more selected from the group consisting of polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, and polyoxyethylene sorbitol tetraoleate. (1) Bath additives described.