KR101992144B1 - Method for measuring long-lasting time of cosmetic composition - Google Patents

Abstract

More particularly, the present invention relates to a method for measuring the persistence of a cosmetic composition through contact angle measurement, and more particularly, to a method for measuring the contact angle by measuring a contact angle after dropping a certain amount of water or sebum component on a cosmetic- (Oil resistance), and it provides a method of objectively measuring the sustainability by measuring it repeatedly at a constant time interval and using it as a water resistance (oil resistance) maintenance time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method for measuring persistence of a cosmetic composition through contact angle measurement. More particularly, the present invention relates to a method for measuring the continuity of a cosmetic composition through contact angle measurement, (Oil resistance) by measuring a contact angle after dropping a certain amount of water or sebum component on the surface of the substrate, measuring it repeatedly at a predetermined time interval, and measuring the duration continuously with the water resistance (oil resistance) It can provide a way to do it.

Make-up cosmetics are very important because of their nature. No matter how beautiful the makeup is done with the ball, it is a result that can not be avoided if the makeup condition collapses and becomes dirty with time. Especially in the case of eye make-up, if the black make-up film can not be maintained and it is buried under the eyes, it is easy to create an undesirable situation such as a dark circle as there is a expression called "Pandar Eye".

Therefore, developers of make-up cosmetics regard sustainability evaluation as more important than any other items in the development of product, and evaluation of continuity during development is actually evaluation method that can be matched with evaluation of sustainability which is felt when consumers use product. Have been studied.

However, as an example of the general persistence measurement method according to the related art as shown in FIG. 1, the persistence can be judged only by the comparative evaluation, so that not only the accurate numerical value can be obtained but also the difference in amount applied to the artificial eyelashes The difference in the force applied when the lens is rolled, and the error caused by comparing the buried amount of the photograph taken with the digital camera with the naked eye, resulting in a difference depending on the measurer. Thus, the degree of persistence It is very difficult to reconcile and objectify.

Korean Patent Laid-Open Publication No. 2012-0050056

The inventors of the present invention have studied measurement methods that can accurately quantify and match the continuity felt by a consumer who uses the actual product without any difference according to the measurer, and as a result, it is possible to use uniform applicator and contact angle measuring device through an applicator And the present invention has been accomplished.

Accordingly, an object of the present invention is to provide a method and apparatus for measuring data of initial water resistance (oil resistance) by measuring a contact angle after dropping a predetermined amount of water or sebum component on a surface to which a makeup cosmetic is applied using a contact angle measuring instrument, (Oil-resistance) holding time by measuring the contact angle with the contact angle.

The present invention relates to a method for measuring an initial water resistance (oil resistance) by measuring a contact angle after dropping a predetermined amount of water or a sebum component on a surface to which a cosmetic is applied using a contact angle measuring instrument and measuring the contact angle repeatedly at a predetermined time interval, (Oil resistance) holding time is measured.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a method of manufacturing a semiconductor device, comprising: a) applying a sample to a plate to a predetermined thickness and drying the same;

b) dropping liquid on the plate; And

c) measuring a contact angle of the liquid;

The present invention relates to a method for measuring the continuity of a cosmetic material.

The plate may be a sample that can be uniformly applied to the surface, for example, a glass plate may be used. The plate is not limited to a glass plate so long as it can be dried without being absorbed by uniformly applying the sample to the surface, and any plate material can be used.

The step of applying the sample to a predetermined thickness may use an applicator, but the present invention is not limited thereto as long as the sample can be coated with a certain thickness.

In one embodiment of the present invention, the thickness for applying the sample may be 10 탆 or more. In another embodiment of the present invention, the thickness for applying the sample may be 200 占 퐉 or less. In another embodiment of the present invention, the thickness for applying the sample may be 10 탆 to 200 탆. When the coating thickness is less than 10 탆, the coating thickness is so small that the time to fully wet the substrate after dropping the water or the sebum is too short to judge the water-holding time (oil resistance). It is not preferable because the sample is wasted.

The liquid may be water or a sebum component. When the liquid is water, the water resistance of the sample to be measured can be evaluated. When the liquid is the sebum component, the oil resistance of the sample to be measured can be evaluated. The liquid may be dropped on the plate to measure the contact angle of the liquid droplet fixed on the plate.

In one embodiment of the present invention, the sebum component is not particularly limited as long as it is an oil component commonly used in the art, and triglycerides can be preferably used. For example, C8-12 Acid Triglyceride, C12-18 Acid Triglyceride, C18-36 Acid Triglyceride, Caprylic / Caprylic / Capric / Lauric Triglyceride, Caprylic / Capric / Linoleic Triglyceride, Caprylic / Capric / Myristic / Stearic Triglyceride Caprylic / Capric / Myristic / Stearic Triglyceride, Caprylic / Capric / Palmitic / Stearic Triglyceride, Caprylic / Capric / Stearic Triglyceride, / Stearic Triglyceride, Caprylic / Capric / Succinic Triglyceride, Caprylic / Capric Triglyceride, Caprylic / Capric Triglyceride Pigment, -4 ester (Caprylic / Capric Triglyceride PEG-4 Esters), C10-40 Isoalkylcide Triglyceride, Cord Liver / Mink / Tallow Triglyceride, C10-18 Triglyceride -18 Triglycerides, C10-18 Triglycerides Polyglyceryl-3 Esters Phosphates, Hydrogenated C12-18 Triglycerides, Lauric / Palmitic / Palitic / Oleic Triglyceride, Mustelic / Palmitic Triglyceride, Oleic / Linoleic Triglyceride, oleic / palmitic / lauric / triglyceride, The present invention relates to a method for producing a medicament for preventing or treating a disease or disorder in a mammal such as a myristic / palmitic / lauric / myristic / linoleic triglyceride, a palmitic / stearic triglyceride, a ricinoleic / caproic / caprylic / Caprylic / Capric Acid Triglyceride, Caprylic / Capric Acid Triglyceride Tricostearic Glyceride Mixture (Caprylic / Capric Acid Triglyceride), Caprylic / Capric Acid Triglyceride, Caprylic / Capric Acid Triglyceride Tristearic Glyceride Mixture, Castor Oil Fatty Acid / Olive Oil Fatty Acid Triglyceride, Coconut Fatty Acid Triglyceride, Conjugated Linoleoyl Triglyceride, Triglyceride, C12-18 Triglycerides, Hydrogenated, Mixed Fatty Acid Triglyceride, Octanoic / Decanoic Acid Triglyceride and the like can be used. have.

The contact angle refers to the angle formed by the surface of the sample on the plate and the liquid, and represents the angle formed when the liquid equilibrates thermodynamically on the solid surface. The measurement of the contact angle between the surface and the liquid is a sensitive surface analysis technique used in many fields such as adhesion, surface treatment, and polymer surface analysis. This contact angle is a measure of the wettability of a solid surface and is measured mostly by the adhered water droplets. When the liquid is water, the contact angle is measured to be low, which means high wettability and high surface energy and high hydrophilic property. The high contact angle means low wettability and low surface energy, and the contact angle is measured to be a low wettability and a high surface energy, which means that the lipophilic property is high, and the high contact angle means that the wettability is high, And low surface energy, indicating high oil resistance.

The measurement of the contact angle is not particularly limited as long as it is an apparatus for measuring the contact angle, and any commercially available contact angle measuring apparatus can be used.

The method for measuring persistence of a cosmetic composition according to the present invention may include, more specifically, measuring the contact angle of liquid droplets fixed to the plate immediately after dropping the liquid into droplets in the step of measuring the contact angle of the liquid . The initial water resistance or oil resistance of the sample can be determined through the measured contact angle values.

The method for measuring the persistence of the cosmetic according to the present invention may be repeated more specifically at a predetermined time interval from immediately after dropping the liquid in the step c) of measuring the contact angle of the liquid. For example, after measuring the contact angle immediately after dropping the liquid, the contact angle is measured repeatedly until the liquid droplet is no longer visible to the naked eye at a predetermined time interval, and the time until the contact angle becomes zero is measured It can be judged by the duration of the water resistance or oil resistance. The measurement interval may be 0.5 to 10 minutes, but is not limited thereto.

The sample is an object to be measured for its persistence, and is not particularly limited as long as it is a substance requiring determination of persistency. The sample may be a makeup cosmetic such as an emulsion, cream, lotion, essence, pack, gel, powder, lipstick, makeup base, foundation, lotion, eye shadow, eyeliner, mascara or eyebrow. The sample may be a polymer, a powder, a pigment, a wax raw material, etc. contained in the cosmetic.

Since the persistence measurement method according to the present invention measures the persistence of cosmetic material or cosmetic material by objective value by measuring the contact angle, it is possible to make an objective determination without any error according to the measurer, It is possible to provide an accurate measurement method of continuity. In addition, it is consistent with the sustainability felt by consumers who use real products, which can provide a reliable evaluation.

1 is a conceptual diagram of a general persistence measurement method according to the prior art.
2 is a conceptual diagram showing an example of a method for measuring persistence using a contact angle according to the present invention.
3 is a graph showing the contact angle measurement results of the polymers with time.
4 is a photograph of the contact angle measured immediately after and 15 minutes after dropping a liquid on a composition containing Yodosol GH-34 and Syntran 5775, respectively.

Hereinafter, the present invention will be described in detail with reference to examples and test examples, but the present invention is not limited to these examples.

[Test Example 1] Measurement of contact angle of polymer

The contact angles with time for the polymers that can be used to make the eye makeup compositions shown in Table 1 below were measured.

Each of the polymers Syntran 5760, Yodosol GH-34, Yodosol PUD, Diaformer N-521, Amphomer 4910, Vinysol 1068WP, Syntran 5775 and Syntran 219CG described in Table 1 below was applied to a glass plate to a thickness of 100 탆 using an applicator, , And then one drop of distilled water or caprylic / capric triglyceride was dropped. The contact angle was measured using Pheonix 300 of Surface Electro Optics (Korea) at intervals of 2.5 minutes from immediately after dropping the purified water or caprylic / capric triglyceride to 50 minutes, and the results are shown in the following Table 1 and FIG. 3 .

From the results of Table 1 and FIG. 3, it can be seen that Syntran 5775 is the most persistent, and Yodosol GH-34 is the polymer having a medium contact angle holding time. Yodosol GH-34 is the most commonly used acrylic polymer in eye makeup compositions. By using the measurement method according to the present invention, it is possible to objectively determine the sustainability and sustainability time of the sample.

[Test Example 2] Measurement of contact angle of mascara composition

The contact angle measurement test was carried out using Reference Example 1 which is a mascara composition containing Yodosol GH-34 having the composition according to the following Table 2, and Reference Example 2 which is a mascara composition containing Syntran 5775.

Component name (unit:% by weight) Reference Example 1 Reference Example 2 1. Paraffin 10.0 10.0 2. Wax 5.0 5.0 3. Sorbitan stearate 1.0 1.0 4. Polysorbate 60 1.0 1.0 5. Purified water To 100 To 100 6. Glycerine 3.0 3.0 7. Zanthan gum 2.0 2.0 8. Black iron oxide 10.0 10.0 9. Yodosol (Yodosol GH-34) 10.0 - 10. Syntran (Syntran 5775) - 10.0 11. Preservatives Suitable amount Suitable amount

<Manufacturing Method>

1) Components 1 to 4 are dissolved by heating to 80 캜.

2) Components 5 to 7 are stirred while heating to 80 占 폚.

3) Add the component 8 to the above 1) slowly while stirring.

4) Step 2) is gradually added to the above 3) to emulsify.

5) After emulsification, add ingredients 9 to 11 to 4) and cool to 30 ℃.

Each of Reference Examples 1 and 2 was coated on a glass plate to a thickness of 100 탆 using an applicator, and dried completely. After dropping a drop of purified water as a liquid, contact angle was measured with Pheonix 300 of Surface Electro Optics at intervals of 2.5 minutes Respectively. The contact angle measurement screen photographs and measured values obtained by measuring the contact angles immediately after and 15 minutes after dropping of purified water or caprylic / capric triglyceride were shown in FIG.

The retention retention ratio (%) after 15 minutes was calculated using the following equation (1) through the measurement value according to FIG.

The persistence retention after 15 minutes was 36.06% for the composition of Reference Example 1 and 75.13% for the composition of Reference Example 2. It can be seen that the sustainability retention ratio of the composition of Reference Example 2 is about twice as excellent as that of the composition of Reference Example 1. [

[Test Example 3] Sensory evaluation of persistence

The compositions of Reference Example 1 and Reference Example 2 were used for 10 days for 10 or 20 year old women who used mascara products daily or frequently, and then the consistency of the products was compared. Sustainability was evaluated at the time of using mascara immediately after use, 4 hours and 8 hours afterwards, and a score of 0 to 15 (0: no persistence, 15: very persistent) was given. . ? "When the average score is less than 4.0,"? "When the average score is 4.0 to 8.0,"? "When the average score is 8.1-12.0, and"? "When the average score is more than 12.0.

Test Items Reference Example 1 Reference Example 2 Continuity immediately after use of mascara ◎ ◎ Persistence after 4 hours △ O Persistence after 8 hours X △

From the results of Table 3, it can be seen that the durability immediately after use of mascara was excellent in all the products of Reference Example 1 and Reference Example 2, but the maintenance of the durability over time was much better than that of Reference Example 1 , And the score was about twice as high. Thus, it can be confirmed that the result of the sustainability ratio according to the measurement method according to the present invention is consistent with the evaluation of the actual user.

Claims (9)

As a method for evaluating the persistence of a cosmetic,
a) applying a sample of the cosmetic sample to be measured to a predetermined thickness and drying the same;
b) dropping a liquid selected from water and sebum components on the plate, wherein the water is a liquid for determining a water resistance holding time of the cosmetic, and the sebum component is a liquid for determining the oil retention time of the cosmetic;
c) measuring the contact angle between the liquid dropped on the plate and the cosmetic sample applied to the plate; And
d) calculating the persistence retention rate of the cosmetic sample according to the following formula, and determining that the higher the persistency retention ratio calculated is, the longer the water resistance or oil retention time of the cosmetic sample is and the longer the retention is , Method of evaluating continuity of cosmetics:
Persistence retention rate = 100 x (contact angle measured after a certain period of time after dropping liquid on a plate coated with the sample) / (contact angle measured immediately after dropping liquid on the plate on which the sample is applied) The method according to claim 1,
Wherein the contact angle measurement is repeated until the contact angle reaches 0 ° at a predetermined time interval immediately after dropping the liquid in the step c). 3. The method of claim 2,
The contact angle measured immediately after dropping the liquid when the liquid is water indicates an initial water resistance, and the contact angle measured repeatedly at a predetermined time interval indicates a water resistance holding time;
Wherein the contact angle measured immediately after dropping the liquid when the liquid is a sebum component indicates an initial oil resistance and the contact angle measured repeatedly at a predetermined time interval indicates an oil resistance holding time. The method according to claim 1,
Wherein the coating thickness of the cosmetic sample is 10 占 퐉 to 200 占 퐉 in the step a). delete delete delete The method according to claim 1,
The cosmetic sample is at least one cosmetic selected from the group consisting of an emulsion, cream, lotion, essence, pack, gel, powder, lipstick, makeup base, foundation, lotion, eye shadow, eyeliner, mascara and eyebrow Of the cosmetic composition. The method according to claim 1,
Wherein the cosmetic sample is at least one cosmetic raw material selected from the group consisting of a polymer, a powder, a coloring matter and a wax contained in the cosmetic.

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