KR101500987B1 - Hydrogel composition for masking pack containing water-soluble polyurethane - Google Patents

Abstract

The present invention relates to a hydrogel composition, and more particularly, to a hydrogel composition including a water-soluble polyurethane and having improved elasticity and air permeability, which comprises 0.01 to 5.0% by weight of a water-soluble polyurethane based on the total weight of the composition, A cosmetic composition containing 1.0 to 60.0% by weight of a functional cosmetic component for imparting a skin-beauty function, 0.1 to 1.0% by weight of an electrolyte, 10.0 to 30.0% by weight of a polyhydric alcohol as a plasticizer, a preservative and a solvent .
The hydrogel composition of the present invention is a beauty mask preliminarily manufactured and distributed in the form of a face or a patch, and is excellent in adhesion to skin without additional adhesive components due to its improved elasticity, can maintain its shape for a long time, The useful ingredient of the skin can be easily delivered to the skin without fear of irritation.

Description

[0001] The present invention relates to a water-soluble polyurethane-containing water-soluble polyurethane,

The present invention relates to a hydrogel composition, and more particularly to a hydrogel composition for a mask pack comprising a water-soluble polyurethane which improves the elastic properties of the gel and has breathability.

Hydrogels are substances with high water-solubility containing a large amount of water, and their application fields such as medicine, pharmaceuticals, implants and contact lenses are becoming diverse. In recent years, it has been utilized not only as a wound dressing and a drug delivery medium but also in the field of cosmetics as an agent for delivering various effects such as moisturizing, nutritional supply, wrinkle improvement and whitening to the skin.

In general, a hydrogel containing a natural polymer gelling agent is produced through various processes such as liquid-liquid molding, processing, and packaging. Since it is composed only of a natural polymer gelling agent, it is weak in resistance to abrasion and compression, This has a low drawback. In order to overcome these disadvantages, various attempts have been made to increase the gel strength and increase the production efficiency through the combination of natural and synthetic polymers. In addition, since the hydrogel contains a large amount of water and is low in air permeability, there arises a problem that the skin softens during prolonged application.

General polyurethane is elastic and has excellent air permeability. However, since it is insoluble in water, there is a restriction that it contains a water soluble active ingredient which occupies a large part of skin active ingredients as a cosmetic ingredient. A gel made of a water soluble polyurethane material itself contains a water soluble active ingredient However, it has a problem that it is not skin-friendly and is not environmentally friendly as compared with a gel made of a natural polymer gelling agent because of poor skin adhesion.

Therefore, in order to overcome these problems, there is a demand for a hydrogel composition which can contain a large amount of skin active ingredients and improve the breathability and elasticity of a high-function hydrogel having excellent adhesion.

In order to overcome such conventional problems, the present invention provides a hydrogel composition having improved elasticity and permeability by combining a permeability and an elastic force imparted by a porous structure of a urethane material to a hydrogel, and a method for producing the same.

In order to achieve the above object, the present invention provides a hydrogel composition containing a natural polymer material including water-soluble polyurethane and carrageenan gum.

Generally, polyurethane refers to a polymer containing a urethane bonding group (-NHCOO-) in a molecular chain. The urethane bond groups contained in the polyurethane are produced by the reaction between isocyanate (-NCO) and alcohol (-OH).

The polyurethane generation scheme

R-NCO (isocyanate) + HO-R '(alcohol) R-NHCOO-R'.

As a method for making the polyurethane used in the present invention water-soluble, there are usually a self-emulsification method and a forced emulsification method. Among them, the self-emulsification method is an ionic water-soluble polyurethane which can be dispersed in water without an emulsifier by introducing an ionic functional group such as anion or cation into the molecule

(1) A water-soluble polyurethane or urethane prepolymer produced by reacting an urethane prepolymer synthesized with an isocyanate and a polyol in an anion form with an aqueous solution of an amino alkane sulfonate is reacted with hydroxyl ), And then neutralized with sodium hydroxide (NaOH) to produce a water-soluble polyurethane,

(2) A urethane prepolymer synthesized with isocyanate and polyol in the form of cation is polymerized into a chain extender having a tertiary amino group to cationize the tertiary amino group in the molecule with a quaternizing agent. Soluble polyurethane or urethane prepolymer reacted with a tertiary amine having a hydroxyl group is reacted with a quaternizing agent or a water-soluble polyurethane prepared by neutralization with an aqueous acid solution,

(3) When an isocyanate group is blocked by adding a bisulfite to an isocyanate group of a urethane prepolymer, the isocyanate group is dissolved or dispersed in the water due to the hydrophilicity of the unitized sulfonated salt group Soluble polyurethane,

(4) A method for producing a water-soluble polyurethane produced by using a water-soluble polyol such as polyethylene glycol as a component of a polyol which is a raw material of a non-ionic aqueous urethane resin.

There is also a forced emulsification method in which a water-soluble polyurethane is produced by forcibly emulsifying a polyurethane or a urethane prepolymer synthesized with isocyanate and a polyol with a high mechanical shear force using an emulsifier.

Representative characteristics of the water-soluble polyurethane used in the present invention are as follows.

① Excellent mechanical properties such as tensile strength, tear strength, abrasion resistance, rebound resilience.

② It has excellent chemical resistance such as solvent resistance, alkali resistance and acid resistance by forming a three-dimensional network structure.

③ Excellent flexibility and elasticity due to urethane structure.

④ It is resistant to aging such as heat resistance, cold resistance and weather resistance.

⑤ Because it does not contain organic solvents, it is environment-friendly and harmless to human body.

⑥ It has air permeability because it has a structural form of porous foam.

The present inventors have attempted to overcome the problems of conventional hydrogels by improving the ventilation performance and elasticity by using the three-dimensional network structure of water-soluble polyurethane among the above-mentioned characteristics.

The water-soluble polyurethane contained in the present invention may contain 0.01 to 5.0% by weight based on the total weight of the composition. Mixing ratio of polyurethane and natural polymer gelling agent can be mixed in a ratio of 1: 1.3 to 1:20. When the ratio is less than 1: 1.3, difficulties may be caused due to melt mixing of urethane material and hardness of gel , And when it is 1:20 or more, the characteristics of the polyurethane are slightly expressed in the hydrogel, and the hydrogel improvement effect is not satisfied.

In addition, the natural gelling agent including carrageenan may contain 0.4 to 5.0% by weight, based on the weight of the gelling agent. The use of a mixture of two or more of the above natural polymer materials has an effect of raising the gel strength and a ratio of 3: 7 to 7: 3, preferably 4: 6 to 6: 4 Is more preferable.

Further, an electrolyte may be used to improve the tear strength of the natural polymer material. This is because the electrolyte forms crosslinking with the natural polymer material. The electrolyte used may be one of potassium chloride, magnesium chloride, sodium chloride, and calcium chloride. In particular, 0.1 to 0.5 wt% of potassium chloride is preferably used.

In addition, it is also possible to use a skin-active ingredient as a component having functions of improving wrinkles, whitening, moisturizing, and supplying nutrients such as adenosine, arbutin, hyaluronic acid, glycerin, butyleneglycol, marine collagen, march extract, tocopheryl acetate, Dithia, ethyl hexanediol, glyceryl caprylate, and the like, but the present invention is not limited thereto.

The present invention relates to a composition comprising 0.01 to 5.0% by weight of a water-soluble polyurethane, 0.4 to 5.0% by weight of a natural polymer gelling agent, 0.1 to 1.0% by weight of an electrolyte, 1.0 to 60.0% by weight of a skin active ingredient, 10.0 to 30.0% The present invention relates to a hydrogel composition for a mask pack having improved elasticity and air permeability, which comprises a solvent containing a surfactant,

In addition, the present invention is characterized in that the mixing ratio of the water-soluble polyurethane and the natural polymer gelling agent is 1: 1.3 to 1:20 by weight.

In addition, the present invention is characterized in that the natural polymer gelling agent is composed of carrageenan gum and at least one natural polymer gelling agent, and the mixing ratio is 3: 7 to 7: 3 by weight.

Further, the present invention is characterized in that the water-soluble polyurethane is a condensation product containing a self-emulsifiable component which enables internal emulsification of an isocyanate, a polyol and a synthesized polyurethane.

The present invention is further characterized in that the water-soluble polyurethane is a water-soluble polyurethane obtained by forcibly emulsifying a polyurethane or urethane prepolymer synthesized with an isocyanate and a polyol by a mechanical shear force using an emulsifier.

The present invention also relates to the above-mentioned natural polymer gelling agent as a natural polymer substance including Carrageenan Gum and a natural polymer substance including Xanthan Gum, Cassia Gum, Gellan Gum, Locust Bean Gum ), Agar, alginate, mannan, guar gum, pluroinc, pectin, and cellulose. The term " .

Further, the present invention is characterized in that the electrolyte is at least one electrolyte selected from potassium chloride, magnesium chloride, sodium chloride and calcium chloride.

In addition, the present invention is characterized in that the skin active ingredient contains at least one component having a skin cosmetic function including improvement of wrinkles, skin whitening, moisture supply, nutrition supply and improvement of skin elasticity.

In addition, the present invention

a) 0.01 to 5.0% by weight of a water-soluble polyurethane, 0.4 to 5.0% by weight of a natural polymer gelling agent, 0.1 to 1.0% by weight of an electrolyte, 1.0 to 60.0% by weight of a skin active ingredient, 10.0 to 30.0% by weight of a polyhydric alcohol as a plasticizer %, A preservative and a solvent including water to prepare a mixed solution;

b) melting the mixture of the above by heating at 70 to 90 ° C to prepare a gel mixture;

and c) placing the molten gel mixture in a mold at 45 to 60 DEG C lower than the gel forming temperature of a general hydrogel to prepare a gel-like hydrogel-formed body.

The hydrogel composition of the present invention contains one or more natural polymers including carrageenan to form a gel, and the tear strength can be improved by adding an electrolyte. Further, by including the water-soluble polyurethane, a hydrogel having improved elasticity and air permeability can be obtained.

Further, since the hydrogel composition of the present invention contains a polyurethane material, the temperature condition at the time of molding can be lowered and the production efficiency is increased. Generally, the natural polymer hydrogel is formed at about 60 to 65 ° C., and the hydrogel containing water-soluble polyurethane can be formed at about 50 to 55 ° C., thereby improving the production efficiency.

1 is a graph of compressive strength of a hydrogel according to a mixing ratio of a natural polymer, carrageenan, and a cacao gum.
2 is a graph of the compressive strength of the hydrogel according to the content of potassium chloride.
Figure 3 is a gel elasticity graph with water soluble polyurethane content.
4 is a graph showing a relative comparison of air permeability.
Fig. 5 is a graph showing relative elastic force versus relative force.

Hereinafter, the structure of the present invention will be described in more detail with reference to specific examples. The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and method for controlling the same. However, it is apparent to those skilled in the art that the scope of the present invention is not limited by the descriptions of the embodiments.

≪ Examples 1 to 5 and Comparative Examples 1 and 2 >

Natural Polymer Gelling Agent The following Examples and Comparative Experiments were conducted to determine the mixing ratios of carrageenan gum and other natural polymer gelling agents.

In Examples 1 to 5 and Comparative Examples 1 and 2, a hydrogel composition was prepared by stirring at 75 DEG C for 30 minutes while adjusting the mixing ratio of carrageenan gum and cacao gum within a range of 0.2 to 0.8 wt%, respectively.

The state of the thus-formed hydrogel composition was confirmed by measuring the compressive strength.

Gel strength was measured at room temperature using Instron 5569 (Instron co., USA). The thickness of the specimen was 5.0 mm and the diameter was 10 mm. Three specimens were prepared for each specimen. The cross head speed was 10 mm / min when measured, and the compressive strength was measured when the specimen was subjected to 50% deformation.

As a result, in Comparative Example 1, the viscosity was low and gel formation was difficult and the characteristics of the gel could not be shown. In Comparative Example 2, the hardness of the gel was too high, resulting in poor adhesion and a feeling of use as a mask gel. The ratio of carrageenan gum to cacao gum was suitably in the range of 3: 7 to 7: 3, and the most preferable strength was obtained in the feeling and use convenience when the ratio was 5: 5. As the content of carrageenan gum increased, the strength of the gel also increased. However, it was found that the ratio of 5: 5 was the most desirable in terms of feeling as a hydrogel.

≪ Examples 6 to 10 and Comparative Examples 3 to 4 >

Experiments of the following examples and comparative examples were conducted to determine the preferred electrolyte content.

In Examples 6 to 10 and Comparative Examples 3 and 4, cacao gum and carrageenan gum were kept constant at 0.5 wt%, respectively, and stirred at 75 캜 for 30 minutes while changing the potassium chloride to 0.09 to 1.1 wt% to prepare a hydrogel composition Respectively.

The state of the thus-formed hydrogel composition was confirmed by measuring the compressive strength.

Gel strength was measured at room temperature using Instron 5569 (Instron co., USA). The thickness of the specimen was 5.0 mm and the diameter was 10 mm. Three specimens were prepared for each specimen. The cross head speed was 10 mm / min when measured, and the compressive strength was measured when the specimen was subjected to 50% deformation.

As a result, the gel of Comparative Example 3 had a lower strength than that of Example 6, and tearing occurred. In Comparative Example 4, the gel hardness was so high that the adhesion performance as a hydrogel tended to deteriorate. As the amount of potassium chloride increased, the strength of the gel also increased. From the viewpoint of the strength of the gel and the feeling of use as a hydrogel, 0.1 to 1.0 wt%, most preferably 0.2 wt% I could.

≪ Examples 11 to 14 and Comparative Examples 5 to 6 >

Experiments of the following examples and comparative examples were carried out in order to confirm the preferable content ratio of the water-soluble polyurethane.

In Examples 11 to 14 and Comparative Examples 5 to 6, the water content of the water-soluble polyurethane was adjusted in the range of 0.009 to 5.5% by weight while keeping the water content in the purified water at 0.5% by weight of cacao gum, 0.5% by weight of carrageenan gum and 0.2% And the mixture was stirred at 75 DEG C for 30 minutes to prepare a hydrogel composition.

Gel elasticity of the hydrogel composition was confirmed.

Gel elasticity was measured at room temperature using Instron 5569 (Instron co. USA). The thickness of the specimen was 5.0 mm and the diameter was 10 mm. Three specimens were prepared for each specimen. Crosshead speed was 10mm / min., And the measured values were recovered when the specimen was restored to its original state when the pressure was removed after 30% deformation.

As a result, a slight increase in elasticity value was shown in Comparative Example 5, and in Comparative Example 6, the gel had a high hardness and a large amount of bubbles were formed on the gel, making it difficult to form a gel, . Further, it was found that the mixing ratio of the water-soluble polyurethane and the natural polymer gelling agent is preferably in the range of 1: 1.3 to 1:20.

The pH values of the hydrogels prepared in Examples 11 to 14 and Comparative Examples 5 to 6 were measured. As a result, the pH range according to the content of the water-soluble polyurethane was 5.78 to 6.01, which tended to increase slightly with the content of the water-soluble polyurethane , But the increase was not large and it was found to be suitable for the normal range of cosmetic pH.

≪ Example 15 and Comparative Example 7 >

In order to confirm the improved air permeability and elasticity, experiments of the following examples and comparative examples were carried out.

In Example 15, water-soluble polyurethane 1.0% by weight, carrageenan gum and cacao gum 0.5% by weight each, potassium chloride 0.2% by weight, skin active ingredient 25.0% by weight, glycerin 20.0% Lt; 0 > C for 30 minutes to prepare a hydrogel composition.

In Comparative Example 7, a hydrogel composition was prepared except for the water-soluble polyurethane material in Example 15.

The relative permeability of the two hydrogels prepared above was compared.

In the air permeability comparison method, the hydrogel specimens of Example 15 and Comparative Example 7 were sealed together with a nonwoven fabric capable of supporting the intermediate portion of the cylinder in the middle of the sealed cylinder, one inlet of the cylinder was opened, Vacuum was applied by connecting to the pump and the vacuum value of the gauge was relatively indicated. Each specimen was 5 cm * 5 cm wide and 0.5 mm thick. Each specimen was measured for each 5 specimens and the mean value was shown.

As a result, it was confirmed that the air permeability of Example 15 was improved by about 29% as compared with Comparative Example 7.

The elasticity of the two hydrogels prepared in Example 15 and Comparative Example 7 was compared.

Gel elasticity was measured at room temperature using Instron 5569 (Instron co. USA). For the measurement, the specimen thickness was 5.0 mm and the diameter was 10 mm. Three specimens were prepared and measured for each specimen. The cross head speed was 10 mm / min, and the measured values were obtained when the specimen was restored to its original state when the pressure was removed after 30% deformation

As a result, it was confirmed that the elastic force of Example 15 was improved by about 51% as compared with Comparative Example 7.

Claims (7)

Wherein the water-soluble polyurethane is contained in an amount of 0.01 to 5.0% by weight, the natural polymer gelling agent is 0.4 to 5.0% by weight, the electrolyte is 0.1 to 1.0% by weight, the skin active ingredient is 1.0 to 60.0% by weight, the polyhydric alcohol as a plasticizer is 10.0 to 30.0% Wherein the mixing ratio of the water-soluble polyurethane and the natural polymer gelling agent is 1: 1.3 to 1:20 by weight, and the hydrogel composition for a mask pack having improved elasticity and breathability
The method according to claim 1,
The natural polymer gelling agent may be at least one selected from the group consisting of Carrageenan Gum and at least one natural polymer gelling agent such as Xanthan Gum, Cassia Gum, Gellan Gum, Locust Bean Gum), agar, alginate, Mannan, Guar Gum, Pluroinc, Pectin and cellulose, and carrageenan gum And the mixing ratio of the at least one natural polymer gelling agent in the weight ratio of 3: 7 to 7: 3
The method according to claim 1,
Wherein the water-soluble polyurethane is a condensation product comprising a isocyanate, a polyol, and a self-emulsifiable component capable of internal emulsification of the synthesized polyurethane,
The method according to claim 1,
Wherein the water-soluble polyurethane is a water-soluble polyurethane obtained by forcibly emulsifying a polyurethane or a urethane prepolymer synthesized from isocyanate and polyol with a mechanical shear force by using an emulsifying agent.
The method according to claim 1,
Wherein the electrolyte is at least one electrolyte selected from the group consisting of potassium chloride, magnesium chloride, sodium chloride, and calcium chloride.
The method according to claim 1,
Wherein the skin active ingredient contains at least one component having a skin cosmetic function including improvement of wrinkles, skin whitening, water supply, nutrition supply, and skin elasticity improvement.
a) 0.01 to 5.0% by weight of a water-soluble polyurethane, 0.4 to 5.0% by weight of a natural polymer gelling agent, 0.1 to 1.0% by weight of an electrolyte, 1.0 to 60.0% by weight of a skin active ingredient, 10.0 to 30.0% by weight of a polyhydric alcohol as a plasticizer %, A preservative and a solvent including water to prepare a mixed solution;
b) melting the mixture of the above by heating at 70 to 90 ° C to prepare a gel mixture;
c) placing the molten gel mixture in a mold at 45 to 60 DEG C lower than the gel forming temperature of a general hydrogel to produce a gel-like hydrogel-formed body.

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