KR102475684B1 - Low irritant cosmetic composition for skin moisturing comprising rice extract and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a low-irritation skin moisturizing cosmetic composition using a rice extract as a solvent, and a preparation method thereof. The skin moisturizing cosmetic composition of the present invention comprises, based on the total weight of the composition, 50 to 80 wt% of the rice extract, 3 to 13 wt% of glycerin, and 7 to 10 wt% of natural oil, wherein the rice extract contains a rice hot water extract and a rice ethanol extract in a weight ratio of 1 : 0.2 to 0.8. An objective of the present invention is to provide a cosmetic composition having an improved skin barrier function and an improved skin moisturizing effect.

Description

Hypoallergenic skin moisturizing cosmetic composition containing rice extract and manufacturing method thereof

The present invention relates to a hypoallergenic skin moisturizing cosmetic composition having skin moisturizing effect and skin barrier strengthening effect, and less skin irritation by using rice extract, which is a natural extract, instead of purified water, and a manufacturing method thereof.

Purified water, which occupies the largest proportion among cosmetic ingredients, is an indispensable main ingredient in cosmetics, accounting for 70 to 90% of the total weight of cosmetic ingredients.

Unlike tap water or ground water, purified water is water obtained through a purification process, so it is highly pure water obtained by removing impurities dissolved in water, so there is little concern about skin troubles such as allergies.

Purified water, as well as a useful solvent for dissolving water-soluble substances among functional active ingredients for imparting functionality, is applied to the skin in a state in which functional active ingredients useful for the skin are dissolved, so that they can be delivered and absorbed into the skin. do.

The skin consists of the epidermis layer, which constitutes the outermost layer of the skin from the outer surface, the dermis layer, which is a layer under the epidermis that contains fibrous proteins such as collagen and elastin, and the subcutaneous tissue located inside the dermis layer. The subcutaneous tissue is damaged by the skin can be protected from this.

The skin functions as a barrier to prevent harmful substances from entering the body, while absorbing substances that can be absorbed according to the size or absorption form of the substance. An aqueous solvent such as purified water dissolves a water-soluble substance and can be absorbed through the skin in the form of an aqueous solution.

In recent years, for the purpose of improving the functionality and preference of cosmetics, the development of cosmetics using aqueous solvents that have replaced purified water has been actively pursued.

For example, cosmetics using various aqueous solvents replacing purified water such as rose water (rose water), hot spring water, glacial water, deep sea water, and plant extracts have been released.

As such, there is an increasing demand for cosmetics using natural extracts that can replace purified water and function as an aqueous solvent, have less harm to the human body by using materials of natural origin, and improve the absorption rate of active ingredients.

Republic of Korea Patent No. 1182156 (2012.09.12) Republic of Korea Patent Publication No. 2022-0013224 (2022.02.04)

The present invention is to solve the problems of the prior art as described above, to provide a cosmetic composition having improved skin barrier function and improved skin moisturizing effect by providing a cosmetic containing rice extract in place of purified water, for the purpose of providing a cosmetic composition do.

Another object of the present invention is to provide a cosmetic composition that has hypoallergenicity by utilizing a naturally derived extract and can be used for infants.

The skin moisturizing cosmetic composition according to the present invention for solving the above problems is a skin moisturizing cosmetic composition using rice extract as a solvent, based on the total weight of the composition, 3 to 13% by weight of glycerin, 7 to 10% by weight of natural oil 10% by weight and the remaining amount of rice extract, wherein the rice extract includes a rice hot water extract and a rice ethanol extract in a weight ratio of 1: 0.2 to 0.8.

In the present invention, the rice hot water extract may be hot water extraction with distilled water of white rice aged for 12 to 36 hours at a temperature of 5 ° C.

In the present invention, the rice ethanol extract may be extracted with 95% ethanol of white rice aged for 12 to 36 hours at a temperature of 5 ° C.

The present invention is also a method for producing a skin moisturizing cosmetic composition, (a) grinding white rice aged for 12 to 36 hours at a temperature of 5 ° C, putting it in distilled water and immersing it at a temperature of 50 ° C for 12 hours, Filtering to prepare a rice hot water extract, (b) white rice aged for 12 to 36 hours at a temperature of 5 ° C. was soaked in 95% ethanol for 12 hours, and then filtered to prepare a rice ethanol extract, (c) preparing a rice extract by mixing the rice hot water extract of step (a) and the rice ethanol extract of step (b), and (d) adding glycerin and natural oil to the rice extract of step (c) and mixing It provides a method for producing a skin moisturizing cosmetic composition comprising the step of.

Specifically, in step (c), the rice ethanol extract in step (b) is added dropwise to the rice hot water extract in step (a) at a rate of 1 to 2 ml/sec and mixed, and in step (d), mixing It may further include the step of applying ultrasound for 10 to 30 minutes afterwards.

The skin moisturizing cosmetic composition according to the present invention has an excellent moisturizing effect and an excellent skin barrier strengthening effect.

The skin moisturizing cosmetic composition according to the present invention has an effect suitable for use with sensitive skin or infants because it does not irritate the skin while using natural extracts.

1 is a graph showing the change rate of skin moisture content for cosmetics of Examples and Comparative Examples.
Figure 2 is a graph showing the change rate of skin erythema for cosmetics of Examples and Comparative Examples.

Hereinafter, each configuration of the present invention will be described in more detail so that those skilled in the art can easily practice it, but this is only one example, and the scope of the present invention is Not limited.

“Preferred” or “preferably” as used herein refers to embodiments of the present invention that have particular advantages under particular conditions. However, other embodiments may also be preferred under the same or different conditions. Also, the presence of one or more preferred embodiments does not imply that other embodiments are not useful, nor does it exclude other embodiments from being within the scope of the present invention.

As used herein, the term "comprising" is used when listing materials, compositions, devices, and methods useful in the present invention and is not limited to the examples listed.

The present invention is a skin moisturizing cosmetic composition using rice extract as a solvent, based on the total weight of the composition, 3 to 13% by weight of glycerin, 7 to 10% by weight of natural oil and the remaining amount of rice extract, the rice The extract relates to a skin moisturizing cosmetic composition comprising a rice hot water extract and a rice ethanol extract in a weight ratio of 1: 0.2 to 0.8.

Rice is a major Asian food rich in nutrients such as carbohydrates, proteins, minerals including unsaturated fatty acids, vitamins, and dietary fiber. Recently, cleaning compositions and cosmetic compositions using rice water have been developed.

Rice extract is obtained by extracting useful nutrients from rice, in particular, water-soluble nutrients such as minerals and vitamins, using an extraction solvent.

The present invention provides a skin-moisturizing cosmetic using a recently developed rice extract, while replacing water, such as purified water, which is a major component and solvent added during cosmetic preparation, by including useful ingredients derived from the rice extract itself in the cosmetic , It is characterized in that it is used as a solvent that enhances the functionality of cosmetics and dissolves functional water-soluble substances.

The rice extract according to the present invention is characterized in that it comprises a rice hot water extract and a rice ethanol extract in a weight ratio of 1: 0.2 to 0.8. More preferably, it may be included in a weight ratio of 1: 0.3 to 0.5.

If the content of rice ethanol extract is less than the above ratio, there is a problem that the long-term and short-term moisturizing effect is somewhat low, and when the content of rice ethanol extract is excessive than the above ratio, it causes skin erythema or skin irritation such as skin redness There are problems that can cause

Rice, which is a material for preparing the rice extract, is preferably white rice aged for 12 to 36 hours at a temperature of 5 ° C. Through the aging process, unnecessary oil and moisture remaining on the surface of the white rice is removed, and micropores are naturally formed on the surface, thereby improving the penetration rate of water in the process of preparing the extract.

On the other hand, the rice hot water extract may be obtained by pulverizing the aged white rice to 50 to 100 mesh, putting it in distilled water, and performing hot water extraction at a temperature of 40 to 60 ° C. for 10 to 20 hours.

More specifically, it may be prepared by immersing at a temperature of 50° C. for 12 hours and then filtering to remove solids.

In the case of grinding with a powder degree higher than the powder degree, there is a problem that the rice extract is not obtained and is obtained in the form of porridge. There is a problem that this excessive consumption or the content of nutrients is reduced.

It is important that the temperature of the hot water extraction is performed within the above temperature range. At a temperature higher than the above temperature, the surface of polished rice becomes gelatinized, and it is difficult to prepare an extract due to cohesive force between the powders.

The rice ethanol extract is prepared by putting white rice (unground) in 95% ethanol and extracting at room temperature for 10 to 12 hours.

More preferably, after extraction for 12 hours, filtration is performed to obtain a rice ethanol extract.

Extraction is performed at room temperature without additional heat, which has a problem in that the yield rate of rice ethanol extract is slow at low temperatures, and at higher temperatures, due to the volatility of the ethanol solvent, it is difficult to obtain rice ethanol extract with constant quality there is

The obtained rice hot water extract is naturally cooled at room temperature to a temperature of 20 to 25 ° C, and then managed to maintain a constant temperature. Based on this, a rice extract is prepared by slowly adding and mixing the rice ethanol extract maintained at 1 to 3 ° C. dropwise at a rate of 1 to 2 ml / sec.

The prepared rice extract is prepared as a skin moisturizing cosmetic by adding glycerin, natural oil, etc. More specifically, the skin moisturizing cosmetic composition according to the present invention includes 50 to 80% by weight of the rice extract, 3 to 13% by weight of glycerin, and 7 to 10% by weight of natural oil.

However, these are components that must be included as essential, and may further include various components that can be included in cosmetics such as emollients, surfactants, natural extracts, functional active ingredients, and the like.

If the content of glycerin is less than the above content, there is a problem in that the moisturizing effect is greatly reduced, and if the content of glycerin is excessive, skin irritation or trouble due to an increase in the viscosity of cosmetics or an increase in moisture retention time, etc. there is a problem.

Natural oils include all natural oils that can be referred to as natural oils such as plant-derived natural oils, mineral-derived natural oils, and animal-derived natural oils. By including natural oil, it has a level of hypoallergenicity suitable for use on infant skin.

If the content of the natural oil is excessive, there is a problem that the oily feeling on the skin surface is excessive, which can cause skin irritation or trouble. , there is a problem that the moisturizing effect is poor.

The natural oil may be, for example, vegetable or mineral oil such as grape seed oil, coconut palm oil, caprylic/caprylic triglyceride, and most preferably, grape seed oil, coconut palm oil and caprylic/caprylic/caprylic oil. Caprylic triglyceride can be used.

The skin moisturizing cosmetic composition according to the present invention is not limited to any formulation that can be used as a moisturizing cosmetic, but can be prepared in the form of cream, lotion, butter, etc., in consideration of the texture and viscosity of the composition.

On the other hand, as a method for producing a skin moisturizing cosmetic composition according to the present invention, (a) polished rice aged for 12 to 36 hours at a temperature of 5 ° C. is pulverized, put in distilled water, and immersed at a temperature of 50 ° C. for 12 hours. Filtering to prepare a rice hot water extract, (b) white rice aged for 12 to 36 hours at a temperature of 5 ° C. was soaked in 95% ethanol for 12 hours, and then filtered to prepare a rice ethanol extract, (c) preparing a rice extract by mixing the rice hot water extract of step (a) and the rice ethanol extract of step (b), and (d) adding glycerin and natural oil to the rice extract of step (c) and mixing It provides a method for producing a skin moisturizing cosmetic composition comprising the step of.

For the detailed configuration of each stage, the description of each configuration described above may be referred to.

Specifically, using white rice aged for 12 to 36 hours at a temperature of 5 ° C., a rice hot water extract and a rice ethanol extract are prepared, respectively. As described above, the rice hot-water extract is prepared by pulverizing aged white rice and then performing hot-water extraction by applying heat, and the rice ethanol extract is prepared by adding unpulverized white rice and extracting at room temperature.

The prepared rice hot water extract is naturally cooled, maintained at a temperature of 20 to 25 ° C, and the rice ethanol extract cooled to a temperature of 1 to 3 ° C is slowly added dropwise at a temperature of 1 to 2 ml / sec and mixed.

The prepared cosmetic composition is further subjected to a step of applying ultrasonic waves for 10 to 30 minutes. Through this process, the rice extract droplets and particles in the cosmetic composition are converted into fine particles, and have an effect of improving skin absorption of the cosmetic.

Hereinafter, the content of the present invention will be described in more detail based on examples.

<Production Example>

1 kg of white rice aged at 5°C for 36 hours was pulverized into 50 mesh powder, put in 5L of distilled water, and immersed at 50°C for 12 hours. After filtering this using a filter paper to obtain a hot water extract of rice, it is slowly cooled at room temperature until it reaches a temperature of 20 to 25 ° C. For the rice ethanol extract, 1 kg of white rice (unground) aged at 5° C. for 36 hours was added to 5 L of 95% ethanol and extracted at room temperature for 12 hours.

The rice ethanol extract was prepared while maintaining at 1 to 3 ° C and slowly added dropwise at a rate of 1 to 2 ml / sec to the hot water extract of rice maintained at a temperature of 20 to 25 ° C to prepare a rice extract.

The prepared rice extract was prepared as a moisturizing cream with reference to the composition of Table 1 below, and then was finally completed by applying ultrasonic waves for 30 minutes.

(Unit: % by weight) Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 rice extract content balance balance balance balance balance balance balance balance Rice hot water extract:Rice ethanol extract weight ratio 1:0.3 1:0.5 1:0.1 1:1 1:0.3 1:0.3 1:0.3 1:0.3 glycerin 10 10 10 10 One 15 10 10 Caprylic/Caprylic Triglyceride 6 6 6 6 6 6 2 6 1,2-Hexanediol 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 grapeseed oil 2 2 2 2 2 2 2 2 coconut palm oil 1.8 1.8 1.8 1.8 1.8 1.8 One 4 Cetearyl Alcohol 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Cetearyl Olivate 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 Dipropylene Glycol One One One One One One One One Sorbitan Olivate 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 carbomer 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 tromethamine 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 Coco-Caprylate/Caprate 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 propanediol 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 pear extract 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1

[Test method]

1. Evaluation of continuous skin moisturizing effect

A panel test was conducted on 20 healthy adult males and females (age 29-39 years, average age 34 years) without a history of allergic diseases or atopic dermatitis in the past. No oral corticosteroids, antihistamines, or anti-inflammatory drugs were taken for at least one week before the test, and topical corticosteroids were not applied to the test site.

Transepidermal water evaporation (g/h/m2) was measured using a Corneometer CM 825, a device that measures water content by skin capacitance measurement. From 30 minutes before the start of the test, each sample was uniformly applied to the upper arm of a volunteer waiting in a room under constant temperature and humidity conditions (20-22℃, 40-55% relative humidity), and the moisture content before and after application was measured to determine the rate of change in moisture content. (%) was calculated.

2. Evaluation of skin barrier strengthening effect

In order to confirm the effect of strengthening the skin barrier, after randomly distributing each cosmetic for 30 days, once every evening, as much as 500 won coins was applied to the entire face and absorbed.

After 30 days, as in item 1. above, prepare the same conditions for waiting and experiment conditions of the applicant, measure the skin erythema index using a melanin erythema meter (Mexameter MX18), and measure the skin erythema The change rate was calculated, and the moisture content change rate (%) over time was calculated by measuring the skin moisture content.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 moisture content
Change rate (%) 3 hours after application +7 -One -11 -23 -31 -11 -29 -25 6 hours after application +5 -3 -40 -35 -42 -13 -39 -34 after 30 days +11 +14 +5 +1 -4 +2 +1 -2 Skin erythema change rate (%) -34 -38 -24 +11 -30 +25 +7 +15

1 is a graph showing the rate of change in skin moisture content for cosmetics of Examples and Comparative Examples, and FIG. 2 is a graph showing the rate of change in skin erythema for cosmetics of Examples and Comparative Examples.

Referring to Figures 1, 2 and Table 1, it can be seen that the cosmetic composition according to the embodiment increased or decreased in a small amount in the moisture content change rate over time after application compared to before application.

In addition, it can be confirmed that the moisture content of the skin increased even after using it steadily for 30 days, it can be seen that the cosmetics of the examples are excellent in skin barrier strengthening effect and skin moisturizing effect.

On the other hand, in the case of Comparative Example 1, the skin moisture content was greatly reduced 6 hours after application, and the effect of maintaining the initial moisture content was great, but it could be confirmed that the amount of moisture loss greatly increased over time.

In the case of Comparative Example 2 and Comparative Examples 4 and 6, skin erythema increased, and in the case of Comparative Example 4, there were other opinions that some skin troubles were induced.

Comparative Example 3 had an effect of improving skin erythema, but there was a problem in that the skin moisturizing effect was greatly reduced. In the case of Comparative Example 5, there was a problem that the moisturizing effect was insignificant.

Therefore, it can be confirmed that the cosmetics according to the examples have less skin irritation and have the best skin moisturizing effect.

Claims (5)

As a method for producing a skin moisturizing cosmetic composition containing rice extract as a solvent,
(a) preparing a rice hot water extract by pulverizing white rice aged at 5 ° C. for 36 hours, putting it in distilled water, immersing it at 50 ° C. for 12 hours, and filtering it;
(b) preparing white rice aged at 5° C. for 36 hours in 95% ethanol and immersing for 12 hours, followed by filtering to prepare a rice ethanol extract;
(c) preparing a rice extract by mixing the rice hot water extract of step (a) and the rice ethanol extract of step (b); and
(d) adding glycerin and natural oil to the rice extract of step (c) and mixing;
including,
In step (c), the rice ethanol extract of step (b) is added dropwise to the rice hot water extract of step (a) at a rate of 1 to 2 ml/sec and mixed,
The step (d) further includes applying ultrasonic waves for 10 to 30 minutes after mixing,
Based on the total weight of the skin moisturizing cosmetic composition, 10% by weight of glycerin, 6% by weight of caprylic / caprylic triglyceride, 2.5% by weight of 1,2-hexanediol, 2% by weight of grape seed oil, 1.8% by weight of coconut oil % by weight, including 1.5% by weight of cetearyl alcohol and 1.2% by weight of cetearyl olive and rice extract,
The rice extract is a method for producing a skin moisturizing cosmetic composition comprising a rice hot water extract and rice ethanol extract in a weight ratio of 1: 0.2 to 0.8.
According to claim 1,
The rice extract is a method for producing a skin moisturizing cosmetic composition comprising a rice hot water extract and rice ethanol extract in a weight ratio of 1: 0.3 to 0.5. delete delete delete

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