JPH06329525A - Pack agent for cosmetic - Google Patents

Abstract

PURPOSE:To provide a pack agent for cosmetics, good in jelly shape-retainability and extensibility and having tough skin film formability. CONSTITUTION:A pack agent for cosmetics comprises (A) a water-soluble polymer selected from sodium carboxymethyl cellulose, carrageenan, collagen, xanthan gum, sodium alginate and a carboxyvinyl polymer, (B) a trigluco polysaccharide of formula I (n is an integer of >=100000) preferably having a mol.wt. of 10000-300000, especially aproximately >=200000, and (C) a film-forming polymer such as polyvinyl alcohol, vinylalcohol-alkylvinylether copolymer, preferably in amounts of 0.01-5wt.%, 0.01-10wt.% and 3-50wt.%, respectively. The addition of a carboxymethyl chitin of formula II (X is H, alkali metal; n is an integer of >=10) in an amount of 0.001-5wt.% to the pack agent further improves its viscosity characteristics. The pack agent is good in the separability from fingers, does not cause liquid dropping, and does not leave the end of its applied product when peeled off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic pack having good jelly shape retention and spreadability and having a tough film-forming property.

[0002]

BACKGROUND OF THE INVENTION Cosmetic packs (hereinafter simply referred to as "packs") are used for skin care, and the purpose is to apply them temporarily to the skin. It blocks the external environment from the skin, keeps the moisture contained in the pack and the water brought from under the skin in the stratum corneum to make it soft, gives the skin an appropriate tension while the pack is drying, and further removes the pack. Sometimes it is necessary to remove dirt on the skin to clean it. In order to achieve these objects, the pack agent mainly forms a film when it is applied to the skin such as the face and peels it off (peel-off type), and forms or does not form a film when applied to the skin. What to wash off with (wash-off type)
There is.

In recent years, peel-off type pack agents have been favorably used in terms of convenience of use and effects. The conventional peel-off type pack agent contains a film forming agent, a moisturizing agent, powder, an oily component, ethanol, water and the like, and most of them are in the form of jelly.

However, these conventional pack agents are
It was not possible to obtain good thixotropy, and it was difficult to satisfy both performances of jelly shape retention and skin spreadability. That is, in order to improve the spreadability of the pack agent, the amount of the film-forming agent must be reduced in order to reduce the viscosity, and as a result, the jelly shape retention property deteriorates and becomes difficult to remove on the finger. On the other hand, the amount of the film-forming agent must be increased in order to improve the jelly shape retention of the pack, and as a result, the viscosity increases and spread on the skin is significantly reduced. There was a drawback to do.

Further, in order to improve these drawbacks, sodium carboxymethyl cellulose, collagen, xanthan gum and the like have been supplementarily added, but none of them was practically satisfactory.

Further, the conventional pack agent has a problem that it is difficult to uniformly peel it when peeling it off, and it remains on the end. In order to improve this, it is necessary to improve the film forming property, and therefore, if the amount of film forming agent is increased,
There is a drawback that the viscosity increases and the spreadability when applied to the skin is significantly reduced.

Therefore, the jelly shape retention and spreadability are good,
A pack agent having a tough film-forming property and having no peeling residue has been desired.

[0008]

Under such circumstances, as a result of intensive studies, the present inventors have found that if a specific water-soluble polymer, triglucopolysaccharide and film-forming polymer are used in combination, the jelly-retaining The present invention has been completed by finding that a pack agent having excellent properties, spreadability and film forming property, and having no peeling residue can be obtained.

That is, the present invention provides the following components (A) to
(C): Cosmetic pack containing (A) sodium carboxymethylcellulose, carrageenan, collagen, xanthan gum, sodium alginate, and a water-soluble polymer selected from carboxyvinyl polymer (B) triglucopolysaccharide (C) film-forming polymer Is provided.

Among the water-soluble polymers as the component (A) used in the present invention, sodium carboxymethyl cellulose has the following structure.

[0011]

[Chemical 1]

(In the formula, R represents —CH ₂ COONa or a hydrogen atom, and n represents an integer of 10 or more.) In these sodium carboxymethyl celluloses, the substitution degree of —OCH ₂ COONa is 0.01 to 3.0.
It is preferably 0, particularly 0.5 to 2.0.

As the water-soluble polymer as the component (A), one or more kinds selected from sodium carboxymethyl cellulose, carrageenan, collagen, xanthan gum, sodium alginate and carboxyvinyl polymer can be used in combination. 0.01 in composition
.About.5 wt.
It is preferable to add 5%. If it is less than 0.01%, the finger will be badly dripping, and if it exceeds 5%, the solubility will be poor, and the pack will be paste-like and it will be difficult to obtain good coatability, which is not preferable.

The triglucopolysaccharide as the component (B) has the following structure.

[0015]

[Chemical 2]

(Wherein n represents an integer of 10 or more) The molecular weight of these triglucopolysaccharides is about 10,000 to 300,000,
It is particularly preferably about 200,000.

Commercially available products such as pullulan PI-20 and PF-20 (all manufactured by Hayashibara Co., Ltd.) can be used as these triglucopolysaccharides. The component (B) is 0.01 to 10% as a solid content in the whole composition, especially 0.5 to
It is preferable to add 5%. If it is less than 0.01%, a tough film-forming property cannot be obtained, and if it exceeds 10%, the solubility is poor and good coatability is difficult to obtain.

The film-forming polymer as the component (C) includes
Examples thereof include polyvinyl alcohol, copolymers of vinyl alcohol and alkyl vinyl ether, resin emulsions, and the like, and polyvinyl alcohol is particularly preferable. Polyvinyl alcohol has a molecular weight of 20,000 to 150,000.
00, saponification degree 75 to 95%, especially molecular weight 50,000
It is preferably about 120,000 and a saponification degree of 85 to 90%. As the vinyl alcohol and alkyl vinyl ether copolymer, as shown in JP-A-60-94904, a vinyl alcohol monomer unit of 80 to 98 mol% and a linear or branched alkyl vinyl ether monomer having 1 to 6 carbon atoms can be used. A copolymer composed of units of 2 to 20 mol% is preferred. As the resin emulsion, a polyvinyl acetate emulsion generally used in pack cosmetics,
Examples thereof include isoprene rubber latex, acrylic resin emulsion, polybutadiene rubber latex, styrene-butadiene copolymer emulsion and the like.

It is preferable that these film-forming polymers are added as a polymer solid content in the total composition of 3 to 50%, particularly 5 to 40%. If it is less than 3%, it is difficult to form a film,
If it exceeds 50%, the blending amount of water becomes small and the viscosity becomes high, so that there are drawbacks such as difficulty in spreading in use, and manufacturing becomes difficult, which is not preferable.

Further, it is preferable to add carboxymethyl chitin to the pack agent of the present invention because the viscosity characteristics are further improved. Such carboxymethyl chitin has a structure shown below.

[0021]

[Chemical 3]

(In the formula, X represents a hydrogen atom or an alkali metal atom, and n represents an integer of 10 or more.) These are prepared by a usual method described in, for example, JP-A-59-106409. Manufactured. Also,
It is more preferable to use the high-viscosity carboxymethyl chitin described in JP-A-4-234308 (the viscosity of an aqueous solution of 5 mg / ml at 20 ° C. is 300 cps or more).

These carboxymethyl chitins can be used alone or in combination of two or more, and 0.001 to 5%, particularly 0.01 to 1.
It is preferable to add 0%. If it is less than 0.001%, it is difficult to form a film, and if it exceeds 5%, it is not preferable because defects such as difficulty in spreading in use due to high viscosity and production become difficult.

In addition to the above-mentioned essential components, the pack of the present invention also contains components used in ordinary cosmetics such as glycerin, diglycerin, polyglycerin, propylene glycol, 1,3-butylene glycol, 1,4. -Water-soluble polyhydric alcohols such as butylene glycol, dipropylene glycol, sorbitol, maltitol, xylitol; animal and vegetable oils such as olive oil, palm oil, coconut oil, hydrocarbon oils such as liquid paraffin, squalane, oleic acid, isostearic acid, etc. Higher fatty acids, higher fatty alcohols such as oleyl alcohol and isostearyl alcohol, and oil components such as ester oils such as isostearyl myristate and cetyl octanate; titanium oxide,
Pigments such as kaolin, sericite, zinc white, silica, mica; bentonite, montmorillonite, saponite,
Water-swelling clay minerals such as heclite; other surfactants, preservatives, bactericides, colorants, fragrances, medicinal agents, water-soluble polymers other than the above, etc. are appropriately blended within a range that does not impair the effects of the present invention. be able to. Further, the pack of the present invention is preferably used in an emulsification system for the purpose of reducing the adhesion to the skin, improving thixotropy, etc., in which case the oil component is 1 to 1
It is preferable to add 0% and a surfactant in the range of 0.1 to 2%.

The pack agent of the present invention can be produced by a conventional method.

[0026]

The pack agent of the present invention is excellent in jelly shape retention and spreadability, has a tough film forming property, and is free from peeling residue. Therefore, even if the fingers are good, there is no dripping, and even when peeling off, the pack agent does not remain at the end and uniform and good peeling is possible.

[0027]

EXAMPLES The present invention will be further described with reference to examples.

Example 1 Packing agents having the compositions shown in Tables 1 to 3 were produced and their usability was evaluated. The results are shown in Tables 1 to 3. (Manufacturing method) Components other than 55% ethanol are heated and mixed, dissolved, cooled to 40 ° C., 55% ethanol is added thereto and mixed, and the mixture is cooled to room temperature to obtain a pack agent.

(Evaluation method) Ten professional panelists were asked to use the pack agent, and the easiness of spreading, dripping, peeling, and the toughness of the film were evaluated and judged according to the following criteria. 1. Ease of spreading the pack ◎: 80% or more of the professional panelists were satisfied that it was easy to spread. ◯: 65% or more of the professional panelists were satisfied that they were easy to extend. Δ: 50% or more of the professional panelists were satisfied that they were easy to extend. X: It was not satisfied that it was easy to spread less than 50% of the specialized panel. 2. Drip of pack agent ⊚: 80% or more of professional panelists were satisfied that no liquid drips. ◯: 65% or more of the professional panelists were satisfied that they did not drip. Δ: 50% or more of the professional panelists were satisfied that they did not drip. X: Not satisfied when less than 50% of specialized panelists dripped. 3. It peels off cleanly when the pack agent is peeled off ◎: 80% or more of the professional panelists were satisfied that they did not remain on the edge. ◯: 65% or more of the professional panelists were satisfied that they did not remain on the edge. B: 50% or more of the professional panelists were satisfied that they did not remain on the edges. X: It was not satisfied that less than 50% of the professional panelists remained at the end. 4. Strength of pack film ◎: 80% or more of professional panelists were satisfied that the film was strong. ◯: 65% or more of the professional panelists were satisfied that the film was strong. Δ: 50% or more of the professional panelists were satisfied that the film was strong. X: It was not satisfied that the film was strong in less than 50% of the professional panelists.

[0030]

[Table 1]

[0031]

[Table 2]

[0032]

[Table 3]

Claims (2)

[Claims] 1. The following components (A) to (C): (A) Water-soluble polymer selected from sodium carboxymethyl cellulose, carrageenan, collagen, xanthan gum, sodium alginate and carboxyvinyl polymer (B) Triglucopolysaccharide (C) A cosmetic pack containing a film-forming polymer. 2. The following components (A) to (D): (A) Water-soluble polymer selected from sodium carboxymethyl cellulose, carrageenan, collagen, xanthan gum, sodium alginate and carboxyvinyl polymer (B) Triglucopolysaccharide (C) A cosmetic pack containing a film-forming polymer (D) carboxymethyl chitin.