JPS6137709A - Transparent gelatinous cosmetic - Google Patents

Abstract

PURPOSE:The titled cosmetic, containing different kinds of surfactants, and capable of incorporating an oil, alcohol, polyhydric alcohol, etc. within a wide concentration range according to the desired purpose. CONSTITUTION:A transparent gelatinous cosmetic containing (A) an ether compound of an aliphatic alcohol with polypropylene oxide polyethylene oxide expressed by the formula (R is saturated straight chain, saturated branched or unsaturated aliphatic alcohol residue; a is 13-35; b is 5-40) and (B) a 12-22C unsaturated or 8-32C branched fatty acid ester of polyoxyethylenesorbitol having 20-60 average number of added ethylene oxide moles and 3-6 esterification degree at 1/20-3/1, preferably 1/11-6/4 ratio in >=3wt%, preferably 7- 40wt% total of the components (A) and (B), and (C) 0-20wt% another nonionic surfactant. The use of both the components (A) and (B) provides improved gel forming ability and oil solubilizing ability which cannot be obtained by the component (A) or (B) alone.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transparent gel-like cosmetic, and more specifically, by combining different types of surfactants, the formulation can be adjusted according to the desired purpose. The present invention provides a transparent gel-like cosmetic that can contain oils, alcohols, polyalcohols, etc. in a wide range of concentrations. Note that the term gel-like as used herein includes those that have structural properties such as anisotropic liquid crystals and isotropic viscous liquids, ranging from those that have fluidity at a child's temperature to those that do not. shall be taken as a thing.

Transparent gel-like cosmetics can give users a refreshing feeling due to the characteristics of their dosage form, that is, their appearance. This can be of great benefit especially in summer products. Therefore, if desired amounts of oil, alcohol, polyhydric alcohol, etc. can be added to this transparent gel base, it will be possible to obtain cosmetics that are excellent in both sensory and functional aspects. For example, if alcohol and oil are added to a transparent gel base that has fluidity, a transparent sherry-like lotion that is between a lotion and an emulsion that has both moisturizing and emollient effects can be obtained. By incorporating an alcohol into a transparent gel base containing an oil agent, a transparent gel cleanser suitable for summer use can be obtained, which has both a refreshing feeling and a cleansing effect.

However, in order to spread and form gels using conventional transparent gels using nonionic surfactants, it was necessary to make the hydrophilic-lipophilic balance hydrophilic, that is, to increase the HLB. Although the solubility of Type 8 was not a problem, the ability to solubilize the oil agent was significantly reduced, and even if an attempt was made to forcefully add the oil agent, a transparent gel-like cosmetic product with an opaque emulsion could not be obtained.

In addition, there is a method of using lamellar liquid crystals to solubilize oil and obtain a transparent gel without increasing the HLB.
In the case of lamellar liquid crystals, when used as cosmetics, they have poor temperature resistance, especially stability at high temperatures of around 40°C, causing problems such as cloudiness and oil-off due to destruction of the liquid crystal structure.

Furthermore, it is also common to obtain transparent gel-like cosmetics, such as cleansing products, using water-soluble polymers such as carboxyvinyl polymers without using surfactant gels.
In this case as well, since no surfactant was used, the oil agent could not be solubilized, and its affinity with the skin was low, resulting in a poor feeling of use. Therefore, the inventors of the present invention sought to solve the above-mentioned conventional problems. As a result of various experimental studies, it was found that when a certain mobilizing agent and gelling agent are combined, a transparent gel-like material can be obtained that can contain not only a large amount of alcohol but also a large amount of oil. This discovery led to the completion of the present invention.

In the present invention, the following component A and the component B below are combined in a total amount of 3 weight -
The present invention relates to a transparent gel cosmetic containing the above and other nonionic surfactants in an amount of 0 to 20% by weight.

Component A: A compound represented by general formula (I).

RO(CsHgO)a(C*H40)bH(I)r, where R: saturated straight chain with 12 to 22 carbon atoms,) B component: polyoxyethylene (n) sorbitol unsaturated (with 12 to 22 carbon atoms)
22) or branched (8 to 32 carbon atoms) fatty acid ester.

The configuration of the present invention will be described in detail below.

First, component A applied to the present invention is represented by the general formula (I
) is an aliphatic allylbolib μpyrene oxide polyethylene oxide ether compound represented by the following formula, in which R represents a residue of a saturated linear, saturated branched, or unsaturated aliphatic alcohol having 12 to 22 carbon atoms. Examples of aliphatic alcohols that provide such aliphatic alcohol residues include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, heptadecyl alcohol, and oleyl alcohol;
-ol, 11-dodecenol-1,12-dobcenol-
1, Lylyl alcohol, Lylyl alcohol, 2-
Examples include various saturated, unsaturated and branched aliphatic alcohols such as hexyldecanol #2-octyldodecanol.

In addition, a and b represent the average addition number of propylene oxide and ethylene oxide, respectively, and a is 13 to 3.
5 and b is 5~. The range is 40. Here, when a is 12 or less, the solubility in ethanol increases too much, resulting in a lack of gel stability, and conversely, when it is 36 or more, the solubilizing ability of the oil agent is insufficient.On the other hand, when b is 4 or less, the hydrophilicity is insufficient. On the other hand, if the number is 41 or more, the hydrophilicity is too strong and the ability to solubilize the oil agent is insufficient.

Next, component B, which is similarly used in the present invention, is polyoxyethylene (n) sorbitol unsaturated or branched fatty acid ester. Here, n is the average number of added moles of ethylene oxide, and is selected from a range of 20 to 60.

When n is less than 19, the lipophilicity is too strong and the substance itself has poor dispersibility.On the other hand, when n is more than 61, the hydrophilicity is too strong and it becomes impossible to form a gel.

In addition, examples of fatty acids forming the present ester substance include unsaturated fatty acids having 12 to 22 carbon atoms, such as 2-2 urolein, 5-myristoleic acid, 2-palmitoleic acid, oleic acid, linoleic acid, arachidonic acid, and erucic acid. And so on,
Branched fatty acids having 8 to 32 carbon atoms, such as 2-ethylhexanoic acid, 2-hebutyldecanoic acid, isostearic acid, 2-
Octyl tocosenoic acid and the like are used. However, when a saturated straight chain fatty acid is used as the fatty acid moiety, it is unsuitable because the crystallinity is too high to form a transparent gel. Similarly, the degree of esterification of these fatty acid moieties must be between 3 and 6; if it is less than 2, the degree of esterification is undesirable because it is too hydrophilic and difficult to form a gel.

In the present invention, in addition to the solubilizing agent and gelling agent as the above-mentioned essential components, other non-alcoholic agents may be added as necessary to further improve the solubilizing ability of the formulation system or adjust the hardness of the gel. An ionic surfactant can be used in combination. Examples of such nonionic surfactants include various nonionic surfactants such as sorbitan fatty acid ester type and polyoxyethylene alkyl ether type.

In the present invention, it is important to contain the above-described two components A and B, or component 311 in addition to other nonionic surfactants, in a certain proportion. That is, A
The total amount of the components and B components must be at least 3% by weight, preferably 7 to 40% by weight, based on the entire transparent gel-like cosmetic, and the content ratio of components A and B must be A/B. When expressed as 1/20 to 3/1, preferably 1/11
It needs to be ~6/4.

If the total amount of the two components A and B is less than 3% by weight, the ability to solubilize the oil agent will decrease and a gel will not be formed. Also, if the A/B ratio is smaller than 1720, separation of the oil will occur, and conversely, if it exceeds 3/1, it will not be possible to make it transparent.

Further, the amount of other nonionic surfactants to be blended is preferably kept at a maximum of 20% by weight or less based on the entire transparent gel cosmetic. As mentioned above, when other nonionic surfactants are used in combination, the ability to solubilize oils and oils improves, but as with conventional transparent gels, the temperature resistance deteriorates as the amount added increases. , the amount used should be the minimum necessary.

To describe the characteristics of the present invention, first, component A is thought to work to solubilize the oil agent and to have a certain degree of gel-forming ability. Furthermore, it is possible to stably hold alcohols and polyhydric alcohols due to the effect of the properly balanced number of added moles of propylene oxide groups and ethylene oxide groups in the molecular structure.

On the other hand, component B has a strong gel-forming ability, and when it coexists with component A, it has the effect of further improving the oil solubilizing ability of component A, resulting in superior properties that cannot be obtained with each component alone. It has the ability to form gels and solubilize oil agents.

For the above reasons, the transparent gel-like material according to the present invention can be prepared using various oils such as non-polar oils such as liquid paraffin and squalane.
Polar oils such as olive oil, linseed oil, octyldecyl myristate (0 to 85% by weight), preferably in the range of 3 to 50% by weight, and ethanol and polyhydric alcohols such as sorbitol, polyethylene glycol, and fluoropylene glycol. Recall etc. can be contained in a range of θ to 60% by weight, preferably 3 to 35% by weight.

Next, in order to evaluate the superiority of the cosmetics of the present invention, we first used the transparent gel-like cleansing product of the present invention shown in Example 1 below and the conventional formulation products shown in Comparative Examples 1 and 2 below. We conducted a comparative test based on usability evaluation. Performance is based on five points,
The results are shown in Table 1.

Comparative Example 1 Transparent sherry-like lensing purified water
82.5% by weight tetrapyrene glycol
8 Dipropylene glyco〃
9 carboxyvinyl polymer 0.5
Comparative Example 2 Cleansing Cream Liquid Panfin 60% by weight Hizwax
6 Palmitic acid 2 Sorbitan monooleate 3 K OH0.5 Purified water 2845 Table 1 As shown in the above table, the product of the present invention has a fart cleansing effect and skin improvement over the conventional transparent sherry cleanser (Comparative Example 1). It is much better in terms of familiarity. This is because a large amount of oil can be blended due to the improved ability to solubilize the oil by using component A and component B together.

Also, when compared to the cleansing cream (Comparative Example 2), the cleansing effect is the same and the cleansing effect is transparent.

It is superior to stone crab in terms of refreshing feeling. Also, in terms of the feel when using it, it has a characteristic that it does not feel sticky. In this way, the product of the present invention provides a refreshing feeling as a cleanser.

It has an unprecedented performance of having a cleansing effect, and its usefulness is judged to be high.

Furthermore, a comparative test was similarly conducted to evaluate usability using the transparent sherry-like lotion of the present invention shown in Example 2 below and the conventional formulation shown in Comparative Example 3 and 4 below. Performance was evaluated using a 5-point system, and the results are shown in Table 2.

Comparative Example 3 Lotion ethanol 13% by weight Polyoxyethylene (40) oleyl ether 0.5 Glycerin 2.5 Polyethylene glycol 8 Fragrance
Appropriate 1+ amount purified water 76 Comparative example 4 Emulsion Liquid paraffin 14 Wt% whale b
cormorant
0.5 Stearic acid 5 Pholyoxyethylene (I0) phenyl ether/I/2 Polyethylene glycol 8 Diethanolamine 1 Purified water 69.5 Table 2 As shown in Figure 2 above, the product of the present invention is a milky lotion (Comparative Example 4).
), it is much better in terms of transparency and coolness, although it has the same moisturizing feeling and leaving a lasting impression on the skin. This is because the combined use of component A and component B improves the ability to retain oil within the structure, and as a result, it is possible to incorporate more oil than emulsion while maintaining a transparent state.

Also, compared to lotion (Comparative Example 3), it has a more transparent feel.

Although it is inferior in cooling sensation, it is superior in moisturizing sensation and leaving a lasting impression on the skin. As described above, the transparent sherry-like lotion of the present invention is highly useful as a new type of lotion that has both the function of an emulsion and the appearance of a lotion.

Examples are shown below. Incidentally, the blending ratio is in weight %.

Example 1 Transparent gel cleansing (oil phase) Liquid paraffin 40.0 Octyldodecyl myristate 6.
0 polyoxyethylene (50) oleyl ether
3.2 Polyoxyethylene (40) cetyl ether 5.2C111H170 (CIH
60) ts(C*HaO)nH4,4 Polyoxyethylene (aO) Sorbitol Tetra □7.2 Oleic acid ester fragrance Appropriate amount Preservative I (Aqueous phase) 1.3-Butylene glycol 4.0 Purified water
20.0 The above oil phase was stirred at 80°C until uniform, and then the aqueous phase was added and cooled to 30°C with stirring to obtain a transparent gel-like cleansing.

Example 2 Transparent sherry lotion (oil phase) Liquid paraffin 17.6 Octyl dobutyl myristate ester 1.6
Polyoxyethylene (4G) cetyl ether
1.3 Sorbitan monooleate
1. OCl, horsetO (CmHsO) + 13 (
CmH40) H2,2 fragrance
Appropriate amount Preservative Appropriate amount (aqueous phase) Dipropylene glycol 5.1 Ethyl alcohol 8.3 Purified water
44.6 The above oil phase was stirred at 80°C until homogeneous, then the aqueous phase was added and cooled to 30°C with stirring to obtain a transparent gel-like lotion.

Example 3 Transparent sherry cleansing (oil phase) Liquid paraffin 3.6C1,H,
, O(CJ,0), 3(C,H40), 4H1,8 polyoxyethylene (sorbitol of 4
□8.6 Tetraoleate propylene glycol 9.1 Fragrance Suitable Preservative
I (Aqueous phase) Ethyl alcohol 9.1 Purified water
57.7 The above oil phase was stirred until homogeneous, then the aqueous phase was added and cooled to 30° C. with stirring to obtain a clear sherry-like cleansing.

Example 4 Transparent gel-like cream (oil phase) Liquid paraffin 29.3 myristate octyldodecyl ester 1.
7C□,H,,O(C,H,0)0. (C,H,0),
. H4,5 polyoxyethylene (3 sorbitol
8.8 Trioleic acid ester polyoxyethylene (50) cetyl ether
1.1 Fragrance
Appropriate amount of preservative l (aqueous phase) Propylene glycol 8.4 Purified water
45.2 The above oil phase was stirred at 80°C until uniform, and then the aqueous phase was added and cooled to 30°C with stirring to obtain a transparent gel-like cream.

Claims (1)

[Scope of Claims] 1) A transparent gel cosmetic characterized by containing the following components A and B in a total amount of 3% by weight or more, and 0 to 20% by weight of other nonionic surfactants. fee. Component A: a compound represented by general formula (I). RO(C_3H_6O)_a(C_2H_4O)_bH
(I) [However, R: saturated straight chain, saturated branched, unsaturated aliphatic alcohol residue having 12 to 22 carbon atoms a: 13 to 35 b: 5 to 40] Component B: polyoxyethylene (n) sorbitol-free Saturated (12 to 22 carbon atoms) or branched (8 to 32 carbon atoms) fatty acid ester. [However, n: 20 to 60, degree of esterification: 3 to 6] 2) The content ratio of the A component and B component is A/B = 1/
The transparent gel-like cosmetic according to claim 1), which has a weight ratio of 20 to 3/1.