JP2000355518A - Gel cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compound having stable gel structure smoothly collapsed in use to a liquid or pasty state and useful for cream, facial cleansing lotion, etc., giving unique characteristic refreshing feeling to the skin. SOLUTION: This cosmetic contains preferably 0.1-1 wt.% native gellan gum composed of a repeating unit expressed by the formula ((n) is an integer) and 0.1-10 wt.% powder (having an average particle diameter of 3-50 μm, e.g. titanium oxide). The gel cosmetic may be incorporated with other components for ordinary cosmetics such as surfactant and oil. Since the native gellan gm has a structure free from deacetylation, it has excellent elasticity and scarcely influenced by pH.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gel cosmetic, and more particularly to a gel cosmetic, which has a stable gel structure, but breaks down smoothly when used to change into a liquid or paste form. The present invention relates to a gel cosmetic that gives a special feeling of use.

[0002]

2. Description of the Related Art Conventionally, as gel cosmetics, cosmetics whose viscosity has been increased by using a water-soluble polymer or a higher alcohol have been known. Also, gel cosmetics containing powder as a scrubbing agent have been known.

However, cosmetics gelled with a water-soluble polymer, for example, a carboxyvinyl polymer, which has been conventionally used as a thickener, may be slightly liquefied at the time of use, but change from a gel state to a liquid state. Dramatic changes did not occur, and it was sometimes difficult to form a gel structure in the presence of an electrolyte such as a salt. Furthermore, when a higher alcohol was used as the thickener, it did not change from a gel state to a liquid state even when applied at the time of use.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to provide a completely new type of liquid which has good gel stability, liquefies smoothly during use, and has a large change in feel given to skin and the like during liquefaction. It is an object of the present invention to provide a novel gel cosmetic which can give a feeling.

[0005]

Means for Solving the Problems In view of the above circumstances, the present inventors have conducted intensive studies and as a result, the gel cosmetic obtained by combining a specific polysaccharide and a powder has a stable gel structure. While taking, it was found that due to the action of the powder contained in the system, it smoothly changed to a liquid or paste state during application and use, and that it exhibited a completely new feeling of use with this structural change, The present invention has been completed.

That is, the present invention provides a compound represented by the general formula (1):

Embedded image (Wherein, n represents an integer) is a gel-like cosmetic containing a native gellan gum comprising a repeating unit represented by the following formula:

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Native gellan gum represented by the formula (1) used in the gel cosmetic of the present invention is a natural polysaccharide obtained by fermentation, and is, for example, a microorganism Pseudomonas.
erodea) is obtained by separating and purifying a polysaccharide produced outside the cells, and has a repeating unit of sugar as is clear from its structure.

As the above native gellan gum, commercially available products such as Kelcogel LT100 (manufactured by Kelco) can be advantageously used.

The powder blended in the cosmetic of the present invention can be used without any particular limitation as long as it can be generally used for cosmetics, and may be either an organic powder or an inorganic powder. The shape of the powder can be appropriately selected from, for example, a plate shape, an irregular shape, and a spherical shape. Further, these powders may be subjected to a surface treatment represented by water repellent, oil repellent treatment, or the like, or
For example, granulated powder, disintegrable powder, and the like may be used. The powder preferably has an average particle diameter in the range of 3 to 50 μm.

Specific examples of powders that can be suitably used include:
Titanium oxide, konjo, ultramarine, red iron oxide, yellow iron oxide,
Black iron oxide, zinc oxide, aluminum oxide, silicon dioxide,
Inorganic powders such as magnesium oxide, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, aluminum magnesium silicate, mica, sericite, talc, kaolin, silicon carbide, barium sulfate, bentonite, smectite, and boron nitride; Bright powders such as titanium mica, iron oxide coated mica, iron oxide mica titanium, organic pigment treated mica titanium, aluminum powder, nylon powder, polymethyl methacrylate, acrylonitrile-methacrylic acid copolymer powder, vinylidene chloride-methacrylic acid Copolymer powder,
Organic powders such as polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, polytetrafluoroethylene powder, wool powder, silk powder, crystalline cellulose, magnesium stearate, zinc stearate, and N-acyl lysine Pigments such as powders, organic tar pigments, organic pigment lake pigments, fine titanium oxide coated mica titanium, fine zinc oxide coated mica titanium, barium sulfate coated mica titanium, titanium oxide containing silicon dioxide, zinc oxide containing Composite powders such as silicon dioxide can be given. One or more of these powders can be appropriately selected and used depending on the purpose.

[0011] The content of native gellan gum in the cosmetic composition of the present invention is not particularly limited, but is preferably in the range of about 0.05 to 2% by weight, more preferably about 0.1 to 1% by weight. Range.

The content of the powder in the cosmetic of the present invention is not particularly limited, but is preferably in the range of about 0.1 to 10% by weight, and more preferably in the range of about 0.3 to 5% by weight.

[0013] The cosmetic of the present invention exhibits a novel and good feeling of use, which has never been seen before, by blending a combination of native gellan gum and powder. That is, the cosmetic of the present invention has a gel-like appearance, but when it is applied to the skin with a finger, a cosmetic spatula, a cosmetic mat or the like, it is drastically changed from a gel to a liquid or paste by friction. It shows a completely new property of changing into a shape. The fresh feeling of use obtained during this structural change is a new feeling that has not been seen in conventional cosmetics.

The gel cosmetic of the present invention contains, in addition to the above essential components, other components used in ordinary cosmetics, for example, surfactants, oils, water-soluble polymers, polyhydric alcohols, lower alcohols, An ultraviolet absorber, an antioxidant, a bactericide, a preservative, a fragrance, a coloring agent, a cosmetic ingredient, and the like can be added as long as the effects of the present invention are not impaired.

The gel cosmetic of the present invention is produced by heating, mixing, cooling, etc., the essential components of native gellan gum, powder and, if necessary, optional components according to a conventional method.

The gel cosmetic of the present invention can be used, for example, as a skin care cosmetic, such as cream, face wash, cleansing, etc.
It can be used as makeup cosmetics, such as foundations, eye shadows, lipsticks, etc., and as hair cosmetics, used for shampoos, rinses, hair conditioners and the like.

[0017]

Unlike the deacetylated gellan gum conventionally used as a gelling agent or stabilizer in foods and cosmetics, the native gellan gum (acetyl group-containing gellan gum) used in the present invention has a structure that is not deacetylated. . Due to this difference in structure, the conventional aqueous solution of deacetylated gellan gum forms a hard and brittle gel, whereas the native gellan gum used in the present invention has a feature that it has excellent elasticity and is hardly affected by pH. .
Therefore, even if conventional deacetylated gellan gum is combined with powder, it is not possible to obtain a structural change such as liquefaction and a characteristic feel of the gel cosmetic of the present invention.

Although the cause of the structural change from gel to liquid when applied to the skin or the like by mixing the powder is not yet clear, the powder acts as a gel structure breaking agent. It is considered that this imparts shearing property during application.

[0019]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 5 and Comparative Examples 1 to 5 Massage ingredients were prepared according to the composition shown in Table 1 and the production method shown below. About the obtained massage fee,
Stability evaluation and sensory evaluation were performed. Table 1 also shows the results.

[0021]

[Table 1]

<Manufacturing method> A: A part of 8, 9 and 17 of 1 to 6 and 7 are dissolved by heating. B: Heat and dissolve the remainder of 7 and 13-16. C: A and B are mixed, and 10 to 12 are further mixed while cooling.

<Evaluation of stability over time> A liquid substance (drainage) separated on the surface of the cosmetic visually after storage at room temperature for one month.
Was checked.

(Judgment criteria) Not drained; ○ Drained; ×

<Sensory Evaluation> Examples 1 to 5 and Comparative Example 1
About 10 cosmetics, the following items were evaluated by 10 female professional panels, and judgment was made according to the following criteria. (Evaluation item) ・ Whether it felt that it changed to liquid when stretched on the skin (+), or not (−) ・ Whether it felt fresh when stretched (+), or not (−)

(Criterion criteria) Eight or more people feel +; ◎ 6 to 7 people feel +; ○ 3 to 5 people feel +; △ Two or less people feel +;

Example 6 Gel Foundation: <Component> Compounding Amount (% by Weight) Native gellan gum 0.5 2. Propylene glycol 5 3.1,3-butylene glycol 10 4. Glycerin 3 5. Hydrogenated lecithin 1 6 Squalane 3 7. Nylon powder 10 8. Titanium oxide 8 9. Yellow iron oxide 1.0 10. Bengara 0.2 11. Iron black 0.05 12. Paraben 0.1 13. Fragrance 0.05 14. Purified water balance

<Manufacturing Method> A: 1, 2, and 14 are heated and dissolved. B: 3-12 are kneaded. C: Add B to A, cool and add 13.

<Results> The obtained gel-like foundation has excellent stability over time and has a fresh feeling of use.
It was an excellent foundation.

Example 7 Gel Cleansing: <Component> Compounding Amount (% by Weight) Native gellan gum 0.7 2. Propylene glycol 5 3. Dipropylene glycol 10 4. Hydrogenated lecithin 3 5. Cellulose powder 4 6. 6. Polyoxyethylene monooleate (15EO) sorbitan Paraben 0.18. Perfume 0.02 9. Purified water balance

<Production Method> A: 1 to 7 and 9 are heated and dissolved. B: Cool A and add 8.

<Results> The obtained gel cleansing was an excellent cleansing agent having excellent stability over time and a fresh feeling upon use.

Example 8 Gel Hair Cream: <Component> Amount (% by Weight) Native gellan gum 0.3 2. Propylene glycol 5 3.1,3-butylene glycol 10 4. Glycerin 10 5. Polyoxyethylene (20EO) hydrogenated castor oil 2 6. Cetanol 1 7. Cetyl trioctanoate 3 8 Liquid paraffin 3 9. Dimethylpolysiloxane 2 10 Titanium mica 1 11. Paraben 0.1 12. Fragrance 0.1 13. Yellow (No. 4) 0.002 14. Purified water balance

<Production Method> A: 5 to 11 are heated and dissolved. B: 1 to 4, 13, and 14 are heated and dissolved. C: Add B to A and emulsify. D: Cool C and add 12.

<Results> The obtained gel-like hair cream was an excellent hair cream having excellent stability over time and a fresh feeling of use.

[0036]

EFFECTS OF THE INVENTION The gel cosmetic of the present invention has the property that, despite having a stable gel structure, the gel structure is broken smoothly during use and changes into a liquid or paste state. It can give a unique and fresh feeling of use not found in the ingredients. that's all

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[Procedure amendment]

[Submission date] February 9, 2000 (200.2.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Native gellan gum represented by the formula (1) used in the gel cosmetic of the present invention is a natural polysaccharide obtained by fermentation, and is, for example, a microorganism Pseudomonas.
e l ODEA) are those in which the purified separated polysaccharides produced extracellularly, those having repeating units of sugar as apparent from its structure.

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Claims (3)

[Claims] 1. A compound of the general formula (1) (Wherein, n represents an integer) A gel cosmetic comprising native gellan gum comprising a repeating unit represented by the following formula: and a powder. 2. The gel cosmetic according to claim 1, wherein the content of the powder is 0.1 to 10% by weight. 3. The gel cosmetic according to claim 1, wherein the powder has an average particle size of 3 to 50 μm.