JPH10182420A - Two-layer bath preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a two-layer bath preparation, excellent in moisturizing and emollient effects, separability into 2 layers, redispersibility from the 2 layers, and emulsibility in a bath, and showing transparent, two-layer type, fine appearance, by combining an oily agent liquid at normal temperature, emulsifier, polyhydric alcohol and ethanol into the two-layer formulation. SOLUTION: This bath preparation is obtained by combining 30 to 80wt.% of an oily agent liquid at normal temperature (e.g. glyceryl tri-2-ethylhexanoate), 5 to 25wt.% of an emulsifier (e.g. polyoxyethylene-(2)-oleyl ether), 5 to 55wt.% of a polyhydric alcohol (e.g. glycerol) and 1 to 10wt.% of ethanol. It shows a better emulsifying effect, when thrown into a bath, at the emulsifier/oily agent wt. ratio of (1:3) to (1:6).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath preparation, and more particularly, it is excellent in skin moisturizing effect and emollient effect, and has two-layer separation properties, re-dispersibility from two layers and emulsification in bath water. Excellent, transparent two-layer appearance,
It relates to a milk bath type liquid bath preparation.

[0002]

2. Description of the Related Art Conventionally, various types of bath agents are commercially available. Above all, so-called milk bath type bath preparations which become milky when dispersed in bath water contain a large amount of oil as a component, so that compared to inorganic salt type bath preparations which have a hot spring effect, skin due to oil content Excellent softening effect (emollient effect) and oil replenishment effect on dry skin. Also, when the milk bath type bath agent is put into the bath water, it becomes cloudy to a milky liquid, so that a dramatic change in the appearance of the bath water can be enjoyed.

[0003]

However, most of such milk bath type bath preparations consist of an oil and an emulsifier or an oil and an emulsifier and water.
Although there was an excellent emollient effect due to the oil content and an excellent effect of replenishing the oil content to dry skin, none of the moisturizing agents had a moisturizing effect, and the width as a bath agent was narrow in the sense of function. Therefore, there has been a demand for the development of a bath agent which is excellent in an emollient effect and an oil replenishing effect for dry skin and has a high moisture effect.

[0004]

Under such circumstances, the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result,
By combining a specific amount of each of oils, emulsifiers, polyhydric alcohols and ethanol at room temperature into a two-layered dosage form, it has excellent moisture and emollient effects, two-layer separability, and redispersion from two layers. The present inventors have found that a milk bath type liquid bath agent exhibiting a beautiful appearance of a transparent two-layer type having excellent properties and emulsification in bath water can be obtained, and the present invention has been completed based on this finding.

That is, the present invention provides the following components (A) to
(D) 30 to 80% by weight of an oil agent liquid at normal temperature (B) 5 to 25% by weight of an emulsifier (C) 5 to 55% by weight of a polyhydric alcohol (D) 1 to 10% by weight of ethanol It is a two-layer type bath agent characterized by the following.

Hereinafter, the present invention will be described in detail. The oil agent which is liquid at room temperature of the component (A) used in the present invention is an essential component for obtaining an emollient effect on the skin and an emulsion in a bath water. The oil agent of the component (A) is not particularly limited as long as it is a liquid oil agent at room temperature used for cosmetics.
An oil agent which is excellent in emulsifiability when dispersed in bath water, has low stickiness when adhered to skin, and has a high emollient effect is preferred. Examples of such oils include hydrocarbon oils such as liquid paraffin and squalane; triglyceride oils such as glyceryl tri-2-ethylhexanoate and glyceryl tricaprate; isopropyl myristate, octyl palmitate, cetyl 2-ethylhexanoate and the like. Ester oils; natural fats and oils such as olive oil and jojoba oil; 2-
Higher alcohols such as octyldodecanol and the like can be mentioned, among which glyceryl tri-2-ethylhexanoate is particularly preferable.

In the present invention, one or two or more kinds of the oily component (A) which is liquid at room temperature can be used in combination, if necessary, and the compounding amount is 30 to 80% by weight of the whole composition. % (Hereinafter, weight% is simply referred to as%), and more preferably 40 to 70%. If the amount of the oil agent is less than 30%, a sufficient emollient effect cannot be obtained, and if it is more than 80%, a sufficient emulsified state cannot be obtained.

[0008] The emulsifier of the component (B) used in the present invention is not particularly limited as long as it is usually used in cosmetics and can emulsify the oil agent as the component (A). For more effective emulsification, nonionic surfactants that are liquid at room temperature are desirable. Specifically, sorbitan monolaurate, sorbitan monooleate, polyoxyethylene monolaurate (2
0) sorbitan, polyoxyethylene monooleate (20) sorbitan, polyoxyethylene monooleate (6) sorbitan, polyoxyethylene trioleate (20) sorbitan, polyethylene glycol monooleate (10EO), mono Polyethylene glycol oleate (6EO), polyethylene glycol monooleate (10EO), polyoxyethylene (10) hydrogenated castor oil, polyoxyethylene (2) oleyl ether, polyoxyethylene (10) nonylphenyl Ether and polyoxyethylene (30) sorbite tetraoleate, among which polyoxyethylene (2) oleyl ether, polyethylene glycol monooleate (10EO), and polyoxytetraoleate are particularly preferred. Ethylene (30) sorbitol are preferred.

In the present invention, the emulsifier of the component (B) is
If necessary, one kind or two or more kinds can be used in combination, and the compounding amount is 5 to 25% of the whole composition. 5%
If the amount is less than 30%, a sufficient emulsified state cannot be obtained, and if the amount exceeds 25%, the skin may become sticky due to a surfactant which is an emulsifier.

Further, in relation to the amount of the oil component (A), the compounding weight ratio (B) / (A) is 1/3 to 1/6.
Within this range, emulsification when put into bath water is more effectively performed, and a good emulsified state can be obtained.

The polyhydric alcohol (C) used in the present invention has a moisturizing effect on the skin, and is effective for forming a beautiful appearance with two transparent layers of an oil layer and a polyhydric alcohol layer. is there. The polyhydric alcohol of the component (C)
There is no particular limitation as long as it is a polyhydric alcohol usually used in cosmetics. Specific examples include polyethylene glycol, propylene glycol, dipropylene glycol, 1,3 butylene glycol, glycerin,
Examples thereof include diglycerin and erythritol, among which glycerin is particularly preferable.

In the present invention, the polyhydric alcohol of the component (C) may be used alone or in combination of two or more, if necessary, and its blending amount is 5 to 55% of the total composition. . If it is less than 5%, a sufficient moisture effect cannot be obtained, and a sufficient effect cannot be obtained in forming a beautiful transparent two-layer appearance. If the content is more than 55%, the skin may become sticky due to the polyhydric alcohol.

[0013] Ethanol as the component (D) used in the present invention is an essential component for more effectively forming a beautiful appearance of a transparent two-layer type. The two-layer separation property and the re-dispersibility from the two layers are remarkably improved. That is, the bath agent which has been dispersed by shaking returns to the transparent two-layer state promptly at rest, and the bath agent quickly becomes a dispersed state during use by slightly shaking.

In the present invention, the blending amount of ethanol as the component (D) is 1 to 10% of the total composition, preferably 3 to 10%.
~ 7%. If the blending amount of ethanol is less than 1%, the two-layer separation property of the oil layer and the polyhydric alcohol layer and the re-dispersibility from the two layers are not sufficient. The turbidity is reduced, and the effect as a milk bath type bath preparation may be impaired.

The two-layer bath agent of the present invention contains, in addition to the above essential components, water, a cosmetic component, an antioxidant, a pigment, in a quantitative and qualitative range according to the purpose, without impairing the effects of the present invention. Other components that are usually blended in bath agents, such as fragrances, preservatives, and bactericides, can also be blended.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The two-layer bath agent of the present invention is filled in a hard or soft transparent to translucent container or the like, and poured into the bath water as it is while shaking the mixture to form an emulsion. It can be used as a type of bath agent. Further, it can also be used as a bath agent of a type in which water-soluble transparent to translucent capsules are filled and the capsules are added to bath water.

[0017]

The present invention will be further described with reference to the following examples. These do not limit the present invention at all.

Examples 1 to 8 and Comparative Examples 1 to 3 Bath Agent A bath agent having the composition shown in Table 1 was prepared, and the two-layer separation property, redispersibility from two layers, milk The turbidity (white turbidity), the emulsified state, and the feeling of the skin after bathing were evaluated. The obtained results are also shown in Table 1.

[0019]

[Table 1]

(Production method) A. Mix components (1)-(6) and (9). B. Mix components (7), (8), (10) and (11). C. B was added to A, and the mixture was filled in a container to obtain a bath agent.

(Evaluation method) The bath preparations of Examples 1 to 8 and Comparative Examples 1 to 3 were handed over to 10 specialized panels, and these were sampled at bathing (approximately 220 liters, bath water at 41 to 42 ° C.). Using 20 ml of the emulsion, milkiness (white turbidity) in bath water, emulsified state, and skin feel after bathing (evaluation item <1>)
-<5>) were evaluated in five steps using the following (a) sensory evaluation criteria. Thereafter, the average value of the scores of each sample was determined using the following (b) four-step criterion. In addition, each sample was shaken to observe its two-layer separability and re-dispersibility from the two layers (evaluation items <6>, <7>), and judged using the following (c) four-step criteria. .

Evaluation Items <1> Emulsification in bath water (white turbidity) <2> Emulsified state in bath water <3> Moist feeling of skin after bathing (moisture effect) <4> After bathing Skin softness (emollient effect) <5> Non-stickiness of skin after bathing <6> Two-layer separation <7> Re-dispersibility from two layers (B) Four-step criteria (average score): (determination) 3.0 or more: ２．０ 2.0 or more and less than 3.0: ○ 1.0 or more, less than 2.0: △ less than 1.0: × (c) Four-step criteria (judgment) ：: Two-layer separation or re-dispersion from two layers is very fast ○: Two-layer separation or re-dispersion from two layers is fast △: Two-layer separation or Redispersion is slow ×: Does not separate from two layers or does not redisperse from two layers

As is clear from the results shown in Table 1, the bath agent of the present invention has two-layer separation,
Good results were shown in redispersibility from two layers, milkiness (white turbidity), emulsified state, and skin feel after bathing, demonstrating that it is an excellent two-layer bath agent.

[0024]

As described in detail above, the two-layer type bath agent of the present invention is a liquid bath for a transparent two-layer type excellent in two-layer separability and re-dispersibility from two layers. It is an agent that shows excellent effects of skin moisturizing, emollient, and emulsification in bath water, and has excellent quality as a bath agent.

Claims (1)

[Claims] 1. The following components (A) to (D), (A) an oil agent which is liquid at room temperature 30 to 80% by weight, (B) an emulsifier 5 to 25% by weight, and (C) a polyhydric alcohol 5 to 55% by weight. D) A two-layer bath agent comprising 1 to 10% by weight of ethanol.