JPS63313709A - Production of skin covering composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition in a jelly or pasty state free from an undissolved lump of powder and bulk, by previously and uniformly wetting a film-forming agent with a mixed solution consisting of a humectant and an alcohol and/or a small amount of water and the rest of water to swell or to dissolve the film-forming agent. CONSTITUTION:A film-forming agent such as polyvinyl alcohol is previously and uniformly wetted with a mixed solution of a humectant (e.g. glycerin or xylitol) and a lower alcohol (especially preferably ethanol) or a mixed solution further blended with apart of water to be used in the composition, then incorporated with the rest of water, the film-forming agent is swollen or dissolved to give a jelly or pasty skin covering composition. The composition is suitable for pack cosmetic, ointment or fomentation. By this production, the film-forming agent can be dispersed or dissolved in a short time by simple operation and with small energy without forming an undissolved lump of powder and bulk, a large amount of the film-forming agent can be blended and the composition can be mass produced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing jelly-like or paste-like skin coating compositions such as pack cosmetics, ointments, poultices, etc. A jelly-like or paste-like skin coating composition containing a film-forming agent such as a compound, a humectant, a lower alcohol, and water that can be efficiently manufactured even when a large amount of film-forming agent is blended or mass-produced. The present invention relates to a method for producing a coating composition.

Conventional techniques and problems to be solved by the invention Compositions with various ingredients and shapes have been used as skin-covering compositions, such as pack cosmetics, ointments, poultices, etc.
Among these skin-covering compositions, compositions containing a film agent, a humectant, a lower alcohol, and water are widely used as jelly-type or paste-type pack cosmetics.

Among these skin-covering compositions containing a film agent, a humectant, a lower alcohol, and water, a general method for producing a jelly-type composition is to first mix a moisturizer with purified water, and then apply a film such as polyvinyl alcohol. Add a thickener such as sodium carboxymethylcellulose or other thickeners if necessary.
The method used is to heat, mix, and dissolve, then add a solution of fragrance, preservative, solubilizer, etc. in lower alcohol such as ethanol, mix, and cool. Furthermore, an aqueous solution consisting of lower alcohol, water, fragrance, solubilizer, preservative, various nutrients, etc., and a viscous aqueous solution containing film agent, thickener, lower alcohol, humectant, etc. were prepared respectively. A method has also been proposed in which a jelly-type composition is obtained by gradually mixing a rainwater solution at room temperature.

In the case of paste-type compositions, they are usually manufactured according to the general manufacturing method for the above-mentioned jelly-type compositions, and powder is added before adding the coating agent, and if necessary, oil is added in the final process. Addition is made. This paste type composition can be produced by preparing an aqueous coating agent solution in advance and adding and mixing powder, oil, etc. to this aqueous solution, or adding powder to the aqueous coating agent solution as a powder dispersion. A method (Japanese Patent Publication No. 48-40746) has also been proposed.

However, when producing such jelly-like or paste-like skin-covering compositions, water-soluble polymer compounds are often used as coating agents and thickeners, but these water-soluble polymer compounds have a negative effect on the particles themselves. Since it dissolves extremely quickly, it is easy to form adhesive aggregates of particles called clumps or clumps when entering any of the above manufacturing methods. When these lumps and lumps are formed, the penetration of water into the lumps and lumps is significantly inhibited, and it takes a long time for the particles to dissolve in the aqueous solution, causing inconvenience in the production of the composition.

Therefore, in order to prevent the formation of lumps and lumps, in the manufacturing process of a jelly-like or paste-like skin coating composition,
(1) Pour the coating agent into the aqueous solution while stirring vigorously near the surface of the water; (2) Mix well with the coating agent in advance using other powder raw materials (e.g. kaolin, titanium oxide, etc.) so that the particles of the coating agent are mixed together. In addition to preventing the aggregation of the powder, a method has been proposed in which this powder mixture is added to an aqueous solution in the same manner as in (1) above. In the composition to be used in combination, (3) a method is adopted in which the coating agent is pre-wetted with a portion of the lower alcohol, then poured into stirring water in the same manner as in (1) above, heated, mixed, and dissolved. Therefore, if the coating agent is dissolved in an aqueous solution using these methods, the formation of lumps and lumps can be largely prevented.

However, another problem with the method for producing the jelly-like or paste-like skin coating composition described above is that when a film agent such as a water-soluble polymer compound is added to and dissolved in an aqueous solution, the film agent itself swells with water. Due to dissolution, the viscosity of the aqueous solution increases during the charging process, making it difficult to add the coating agent. Therefore, it is necessary to finish adding the coating agent before the viscosity increases significantly. This problem arises when the addition of the coating agent to the aqueous solution is completed in a very short period of time in relatively small-scale production, or when the amount of coating agent or thickener added is small.
If it is sufficient to prepare an aqueous solution with a relatively low viscosity, no particular problem arises, and the aqueous solution containing the film side can be prepared by using an appropriate high-viscosity compounding device. However, when it is necessary to prepare a high-viscosity film-side containing aqueous solution containing a large amount of 10% by weight or more, or when it takes time to add the film agent in relatively large-scale production, the above (1) ~(
Even if method 3) is adopted or even if cooling water is used,
The viscosity of the aqueous solution increases in the later stages of addition to the coating side, making it extremely difficult to add and mix the coating agent even if a high viscosity compounding device is used.

In this case, in order to solve this difficulty in adding the coating agent, if a method is adopted in which a large amount of the coating agent is added at once in order to speed up the addition speed of the coating agent, lumps and lumps are likely to form as described above. Become. On the other hand, in order to prevent the formation of lumps and lumps, increasing the dispersibility of the coating agent by increasing the stirring power of the aqueous solution when adding the coating agent will promote swelling and dissolution of the coating agent in water.
It becomes difficult to add and mix the coating agent in the latter stage of addition to the aqueous solution.

Therefore, it is difficult to reconcile solutions for preventing the formation of lumps and lumps with adding a coating agent while suppressing the increase in viscosity, and it is also suitable when a large amount of coating agent is used or when mass production is carried out. There is no known method for producing a skin-covering composition, and therefore, there has been a desire to develop a new method for producing a skin-covering composition.

The present invention was developed in view of the above circumstances, and it is possible to disperse and dissolve a coating agent in an aqueous solution in a short time with simple operations and with little energy without causing lumps or lumps, and allows a large amount of coating agent to be dispersed and dissolved in an aqueous solution. It is an object of the present invention to provide a method for efficiently producing a jelly-like or paste-like skin-covering composition even when the composition is blended into a jelly-like or paste-like skin coating composition or when the composition is mass-produced.

Means and Action for Solving the Problems In order to achieve the above object, the present inventors have made extensive studies and have developed a jelly-like or paste-like product containing a film agent, a humectant, a lower alcohol, and water. When producing a skin-covering composition, a coating agent is added in advance to a mixed solution of a humectant and a lower alcohol, or a mixed solution in which a portion of water is added, and the coating agent is uniformly moistened. By adding the remaining water to swell and dissolve the coating agent, the coating agent, such as a water-soluble polymer compound, becomes wet with the humectant and alcohol, so when the remaining water is added, the coating agent particles are separated from each other. Agglomeration can be prevented as much as possible, and the coating agent can therefore be dissolved without forming lumps or lumps, and the dissolution time of the coating agent in water is much shorter than in conventional production methods. The coating agent dissolves in water = 7- The coating agent itself does not swell and dissolve in water during the process and the viscosity of the aqueous solution increases, and it can be stirred with low energy using a general-purpose simple blending device. According to the above method, the coating agent can be easily and uniformly dispersed and dissolved in an aqueous solution by preventing the formation of agglomerated sticky substances such as lumps and lumps of coating agent particles as described above. Even when using a large amount of coating agent or mass producing skin coating compositions, it is possible to uniformly disperse and dissolve the coating agent in an aqueous solution in a short time and with simple operations and with little energy, resulting in high quality. The inventors have discovered that it is possible to obtain a homogeneous jelly-like or paste-like skin-covering composition, leading to the present invention.

The present invention will be further explained below.

The method for producing the skin-covering composition of the present invention is suitably adopted as a method for producing jelly type or Pace 1 to type pack cosmetics, cartilage, poultices, etc. When producing a jelly-like or paste-like skin coating composition containing water and water, a film agent is added in advance to a mixed solution of a humectant and a lower alcohol, or a mixed solution in which a part of water is added thereto. After uniformly moistening the coating agent, the remaining water is added to the coating agent wetting solution to swell and dissolve the coating agent to produce a skin coating composition.

Here, the skin coating composition according to the production method of the present invention contains a film agent, a humectant, alcohol, and water as essential components as described above.

As the coating agent, various water-soluble polymer compounds such as polyvinyl alcohol, polyvinylpyrrolidone, and sodium carboxymethyl cellulose can be used.

One or more types of hydroxypropyl cellulose, methyl cellulose, polyethylene glycol, pectin, gelatin, vinyl acetate resin emulsion, etc. are mainly used, and they are particularly suitable as base materials for pack cosmetics because of their extremely good film-forming properties. Polyvinyl alcohol is preferably used. Note that there is no problem in using a viscous substance other than the water-soluble polymer compound in combination as a coating agent.

The amount of the coating agent to be blended varies depending on the purpose of the skin-covering composition, and is selected in various ways, but in the present invention, it is suitably adopted for producing a composition containing a large amount of the coating agent, and the amount of the coating agent is the same as the total amount. Compositions of about 10 to 20% by weight can be easily produced.

In addition, in the composition according to the present invention, the above-mentioned water-soluble polymer compound may be blended as a coating agent, and a thickener may also be blended together, if necessary.

Among the water-soluble polymer compounds mentioned above, carboxymethyl cellulose alkali metal salts are particularly preferably used as the thickener.

Further, as a humectant, for example, glycerin, propylene glycol, polyethylene glycol.

Polyhydric alcohols such as sorbitol, dQ-pyrrolidone carboxylate, and xylitol can be used alone or in combination of two or more. In addition, it is preferable that the blending amount of the humectant is about 2 to 10% by weight based on the total amount of ingredients.

Furthermore, as a lower alcohol, ethanol is generally used, and its amount is usually 2 to 1% of the total amount of ingredients.
It is about 5% by weight. Further, the amount of water blended varies depending on the composition, but is approximately 35 to 70% by weight based on the total amount of components.

Therefore, in the manufacturing method of the present invention, among the above components, a coating agent is first added to a mixed solution of a humectant and a lower alcohol, or a mixed solution to which a portion of water is added, and thoroughly immersed therein to form a coating. Wet the agent evenly.

In this case, when the coating agent is immersed in the above mixed solution, the water-soluble polymer compound, etc. that is the coating agent becomes wet without being dissolved in the humectant and lower alcohol. It is preferable to add the mixture at room temperature and pressure without stirring to fully immerse it in the mixed solution.

Here, when a coating agent and a thickener are used together as composition components, it is suitable to add the coating agent and the thickener to the above mixed solution.

In addition, there are cases where the amount of the coating agent is very large and the mixed solution of humectant and lower alcohol cannot sufficiently moisten the coating agent, or the coating agent tends to form lumps or lumps during the next process of dispersing the coating agent in water. When using a moisturizing agent and a lower alcohol, it is preferable to add a small amount of water and soak the coating agent in the mixed solution. In this case, the amount of water added is preferably 40% by weight or less, particularly 25% by weight or less based on the total amount of the humectant and lower alcohol. If the amount of water added is more than 40% by weight, the coating agent may begin to dissolve and lumps may form in the aqueous solution. In addition, especially when the amount of water added to the humectant and lower alcohol is relatively large within the above range, it is preferable to cool the mixed solution of the humectant, lower alcohol and water and then add the coating agent. Further, the lower limit of the amount of water added is not limited, but it is preferably 5% by weight, particularly 7% by weight.

Next, in the present invention, after the coating agent is sufficiently wetted as described above, the remaining water is added to the coating agent wetting solution under stirring to uniformly disperse and dissolve the coating agent in the water. .

In this case, the conditions for adding water are not particularly limited, but it is preferable to quickly add water to the humectant and lower alcohol mixed solution at room temperature and normal pressure while stirring using a general-purpose simple blending device barrel. By using the addition method, the coating agent swells and is uniformly dispersed in the aqueous solution without forming lumps or lumps.

In addition, after the coating agent is uniformly dispersed, it is possible to dissolve the coating agent by stirring at room temperature, but if the coating agent is heated to about 70°C while stirring, the coating agent will be completely dissolved in a relatively short time. It is possible to dissolve and obtain a homogeneous solution.

The skin coating composition according to the present invention may contain powders, oily ingredients, solubilizers, fragrances, preservatives, dyes and pigments, and various active ingredients as other ingredients, as necessary. .

In this case, other ingredients specifically include kaolin,
Powders such as talc, titanium oxide, zinc white, magnesium carbonate, colloidal viscosity, silicic anhydride, aluminum powder, gold powder, etc. (usually blended amount is ○ to 25% of the total amount of ingredients)
Solubilization of oily components such as olive oil, sesame oil, and squalane (usually blended amount is approximately ○ to 5% by weight based on the total amount of components), polyoxyethylene oleyl ether, polyoxyethylene sorbitan monolaurate, etc. preservatives such as paraoxybenzoic acid esters, various natural or synthetic fragrances, and organic synthetic dyes and pigments.

Examples include pigments and dyes such as inorganic pigments and natural dyes.

Furthermore, various active ingredients include skin beauty, anti-inflammatory, sterilization,
Active ingredients having analgesic effects and the like can be appropriately added depending on the intended use of the composition.

Note that these various components can be added and blended into the composition in the same manner as the usual manufacturing method of skin coating compositions.

As described in detail of the invention, the method for producing the skin coating composition of the present invention allows coating agents such as water-soluble polymer compounds to be coated in a short time without causing lumps or lumps with simple operations and with little energy. Since it can be dissolved in an aqueous solution, it is particularly suitable for producing a skin coating composition containing a large amount of a coating agent or for producing a skin coating composition in large quantities.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

In addition, in the following examples, all percentages indicate weight percentages.

[Example 1] A jelly type pack having the following formulation was manufactured by the following method.

Jelly type pack formula Polyvinyl alcohol 10.0% Propylene glycol 5.0 Ethanol
10.0 fragrance
0.1 Methyl paraoxybenzoate 0.2 Purified water 44.5 Total 100.0% Ethanol 9 in a 5KL paddle stirring tank that can be heated and cooled
After adding and dissolving 5 kg of methyl paraoxybenzoate, 2 kg of methyl paraoxybenzoate, and 50 kg of propylene glycol, 100 kg of polyvinyl alcohol was added to the ethanol solution to sufficiently wet the polyvinyl alcohol. Next, 445 kg of purified water and 30 kg of vinyl acetate resin emulsion were added to this.
0 kg was added with stirring to prepare a homogeneous dispersion in which polyvinyl alcohol was swollen. When this homogeneous dispersion was heated to 70° C. while stirring slowly, the polyvinyl alcohol was completely dissolved within 10 minutes after heating. This was cooled, and during cooling, polyoxyoleyl ether 2
A solution of 1 kg of perfume and 5 kg of ethanol was added and mixed to obtain a jelly type pack.

[Comparative Example 1] A jelly-type pack was manufactured using the same recipe as in Example 1 and the same apparatus according to the following method.

First, add 5 kg of propylene glycol to 44.5 kg of purified water.
0kg and 300kg of vinyl acetate resin emulsion, and add 95kg of ethanol to this mixture while stirring at room temperature.
100 kg of polyvinyl alcohol (195 kg as wet material) moistened with 100 g was added to the tank. In this product, lumps and lumps were formed, and a uniform swelling and dispersion of polyvinyl alcohol could not be obtained.Moreover, the polyvinyl alcohol was not completely dissolved even after heating to 70°C and continuing heating for 5 hours.

[Comparative Example 2] Polyvinyl alcohol wet product 19 moistened with ethanol
A jelly-type pack was manufactured in the same manner as in Comparative Example 1 except that 5 kg of polyvinyl alcohol was added at a rate of about 20 kg per minute, and the wet polyvinyl alcohol was smoothly dispersed until about 5 to 6 minutes after the start of addition. However, the viscosity of the dispersion gradually increased, and the dispersion of the wet material became extremely poor after 7 minutes from the start of addition. Furthermore, the dispersion into which the wet substance was added over a period of about 10 minutes was heated to 70°C and heating was continued for 5 hours, but the polyvinyl alcohol was not completely dissolved. [Example 2] Paste with the following formulation A type pack was manufactured by the following method.

Paste type pack formula Polyvinyl alcohol 7.0% carboxymethyl cellulose 3.0 Sodium glycerin 5.0 Olive oil
2.0 titanium oxide
5.0 Kaolin 10.
0 ethanol 6.0 fragrance
0.4 Methyl paraoxybenzoate 0.2 Purified water
61.0 Total 100.0% Ethanol 5 in a 1.5KL paddle stirring tank capable of heating and cooling
After adding and dissolving 5 kg of methyl paraoxybenzoate, 50 kg of glycerin, and 20 kg of purified water, 70 kg of polyvinyl alcohol and 30 kg of sodium carboxymethylcellulose were added and thoroughly moistened with the solution. Next, 450 pieces of a dispersion prepared by dispersing 50 kg of titanium oxide and 100 kg of kaolin in 300 kg of purified water, and the remaining 290 kg of purified water were added to this while stirring, and a homogeneous mixture containing polyvinyl alcohol and sodium carboxymethylcellulose was swollen. A dispersion was prepared.

When this homogeneous dispersion was heated to 70°C while stirring slowly, polyvinyl alcohol and carboxymethyl cellulose sodium were completely dissolved within 10 minutes after heating. After dissolving, it was cooled, and during cooling, 4 sips of polyoxyoleyl ether and 4 kg of fragrance dissolved in 5 kg of ethanol and 20 kg of olive oil were added and mixed to obtain a paste type pack.

[Comparative Example 3] A paste-type pack was manufactured using the same recipe and the same equipment as in Example 2 based on the following method.

First, purified water was added to a mixed solution of ethanol, methyl paraoxybenzoate, and glycerin, and then cellulose sodium was added, and the following procedure was repeated in the same manner as in Example 2 to prepare a dispersion. Clumps were formed, and uniform swelling and dispersion were not obtained.Moreover, polyvinyl alcohol and sodium carboxymethylcellulose were not completely dissolved even after heating to 70°C and continuing heating for 2 hours.

Claims (1)

[Claims] 1. When producing a jelly-like or paste-like skin coating composition containing a film agent, a humectant, a lower alcohol, and water, the film agent is preliminarily mixed with a mixed solution of a moisturizer and a lower alcohol, or mixed with water. A jelly-like or paste-like skin characterized by adding a portion of the coating agent to a mixed solution and moistening it uniformly, and then adding the remaining water to the coating agent wetting solution to swell and dissolve the coating agent. A method for producing a coating composition.