KR102682752B1 - A cosmetic compoisiton for lips comprising a hich content of coloring pigment - Google Patents

Abstract

The present invention relates to a cosmetic composition for lips that contains a high content of coloring pigment and is spread thinly and evenly. More specifically, it is about a lipstick formula that is characterized by high coloring by containing more than 20% of coloring pigment as an oil-dispersed solid, and has a thin application thickness and uniform application by using high-melting point linear polyethylene wax and low-viscosity ester oils. will be. It was confirmed that while expressing more vivid colors than similar high-pigmented lipsticks, the feeling of use was improved, such as thinner application thickness, adhesion, and application uniformity.

Description

Cosmetic composition for lips containing a high content of coloring pigment {A COSMETIC COMPOISITON FOR LIPS COMPRISING A HICH CONTENT OF COLORING PIGMENT}

The present disclosure seeks to provide a cosmetic composition for lips with improved spreadability while containing a high content of color pigment. Specifically, the present disclosure seeks to provide a cosmetic composition for the lips that improves thick application properties when containing a high content of color pigment and can be formed into a stick shape that is applied uniformly and thinly.

In the case of conventional highly colored lipsticks, when a large amount of colored pigments are used, the thickness becomes thick, which causes the inconvenience of feeling stuffy and heavy when used. In addition, due to the stiffness during application, it is difficult to slide on the application area, and as a result, the coloring pigment is not applied with a uniform thickness, resulting in the coloring pigment clumping and spreading.

As the application becomes thicker and the adhesion decreases, pigments or films are sometimes used to improve adhesion, but in this case, there is a problem in that the lips become very dry over time and dead skin cells stand out. In addition, when using a large amount of high-viscosity pastes, which is the most commonly used method, there are limitations in that the feeling of use is heavy and sliding is inhibited due to the unique stickiness. In addition, there are cases where a large amount of wax is contained in order to achieve a thin thickness, but in this case, there are limitations in that smooth application is impeded or color development is inhibited.

Accordingly, there has been a need for a cosmetic composition for the lips that contains a high content of coloring pigments that can be applied thinly and uniformly without impeding color development, has light spreadability, smooth feel, and can be applied thinly and uniformly.

Korean Patent Publication No. 2014-0130131

The present inventors sought to develop a cosmetic composition for lips that contains a high content of coloring pigment and is spread thinly and evenly. More specifically, we sought to develop a cosmetic composition for lips that contains a high content of coloring pigment, has a thin and uniform application thickness, has improved adhesion, is light in use, and has excellent color development.

The present disclosure provides a cosmetic composition for lips containing a color pigment, linear polyethylene wax, and ester oil in order to improve spreadability when containing a high content of color pigment. The hardness of the lip cosmetic composition of the present disclosure may be 100 to 300 gf.

Specifically, the linear polyethylene wax may be a linear polyethylene wax with a high melting point and a high molecular weight.

Additionally, specifically, the ester-based oil may be a low-viscosity ester-based oil.

According to the disclosure of the present specification, even when a high content of coloring pigment is included, a cosmetic composition for lips that is thin and uniform in spreadability and has excellent color development can be provided by mixing linear polyethylene wax and ester oil.

1 is a graph of thickness measurement results according to an embodiment of the present disclosure.
Figure 2 shows a thickness image taken with an objective magnifying glass after applying 10 times on a slide glass, with Example 1 on the left and Comparative Example 1 on the right.

The present disclosure provides a cosmetic composition for lips, which includes a coloring pigment, a linear polyethylene wax, and an ester-based oil, wherein the content of the coloring pigment is 15 to 35% by weight based on the total weight of the cosmetic composition. The linear polyethylene wax is used in a linear structure, and due to its structural characteristics, it has the property of adhering well to the applied area without loosening.

Specifically, the coloring pigment has an amount of at least 15% by weight, at least 17% by weight, at least 19% by weight, at least 20% by weight, at least 21% by weight, at least 22% by weight, and at least 23% by weight, based on the total weight of the lip cosmetic composition. At least 24% by weight, or at least 25% by weight, and at most 35% by weight, at most 33% by weight, at most 31% by weight, at most 30% by weight, at most 29% by weight, at most 28% by weight, at most 27% by weight, or It may be 26% by weight or less.

In one embodiment, the cosmetic composition for lips may have a hardness of 100 to 300 gf, as measured using a rheometer CR-300 (SUN Scientific.co., LTD). The hardness refers to the amount of force required when cutting a composition with a rheometer, and in the present disclosure, it refers to the force required when cutting a cosmetic with a diameter of 10 to 11 mm vertically to a depth of 2 cm. In the case of cosmetic compositions for lips, if the viscosity is too low, the formulation becomes soft and there is a risk of it being applied in lumps instead of being applied evenly, and it is generally stick-shaped and easy to break. Also, if the viscosity is too high, the application becomes thick and is not suitable for lip cosmetic compositions, so lipsticks usually have a hardness of less than 100 gf. However, the cosmetic composition of the present disclosure has a hardness of 100 gf or more and is smooth to apply, and due to the high hardness, it is a formulation that is applied thinly and evenly.

Specifically, the cosmetic composition for lips has a hardness of 100 gf or more, 105 gf or more, 107 gf or more, 109 gf or more, 111 gf or more, 113 gf or more, 115 gf or more, 117 gf or more, 119 gf or more, 121 gf or more. , 123 gf or more, or 124 gf or more, but 250 gf or less, 240 gf or less, 230 gf or less, 220 gf or less, 210 gf or less, 200 gf or less, 190 gf or less, 180 gf or less, 170 gf or less, or 160 gf or less. , 150 gf or less, 145 gf or less, 142 gf or less, 139 gf or less, 136 gf or less, 133 gf or less, 130 gf or less, 127 gf or less, or 126 gf or less.

In one embodiment, the linear polyethylene wax may have a melting point of 90°C or higher. In the present disclosure, a high-melting point linear polyethylene wax is used. Since low-melting point linear polyethylene wax can become thick when applied, a high-melting point linear polyethylene wax is used in cosmetic compositions for lips where it is important to apply thinly and evenly. It is suitable.

Specifically, the linear polyethylene wax has a melting point of 90°C or higher, 92°C or higher, 94°C or higher, 96°C or higher, 98°C or higher, or 100°C or higher, and 110°C or lower, 108°C or lower, 106°C or lower, and 104°C. It may be below or below 102°C.

In one embodiment, the linear polyethylene wax may have a weight average molecular weight of 600 to 800 g/mol. The weight average molecular weight of the linear polyethylene wax corresponds to a high molecular weight, but when a low molecular weight is used, the feeling tends to become thick. Therefore, in lip cosmetic compositions where it is important to apply thinly and evenly, a high molecular weight linear polyethylene wax is used. It is suitable.

Specifically, the weight average molecular weight is 600 g/mol or more, 610 g/mol or more, 620 g/mol or more, 630 g/mol or more, 640 g/mol or more, 650 g/mol or more, 655 g/mol or more, 660 g/mol or more, 665 g/mol or more, 670 g/mol or more, 673 g/mol or more, 676 g/mol or more, 679 g/mol or more, 682 g/mol or more, 685 g/mol or more, 688 g /mol or more, 691 g/mol or more, 694 g/mol or more, 697 g/mol or more, 698 g/mol or more, or 699 g/mol or more and 800 g/mol or less, 790 g/mol or less, or 780 g /mol or less, 770 g/mol or less, 760 g/mol or less, 750 g/mol or less, 745 g/mol or less, 740 g/mol or less, 735 g/mol or less, 730 g/mol or less, 727 g/mol or less, 724 g/mol or less, 721 g/mol or less, 718 g/mol or less, 715 g/mol or less, 712 g/mol or less, 709 g/mol or less, 706 g/mol or less, 703 g/mol or less, It may be less than or equal to 702 g/mol, or less than or equal to 701 g/mol.

In one embodiment, the content of the linear polyethylene wax may be 5 to 10% by weight based on the total weight of the cosmetic composition for lips. Specifically, 5% by weight or more, 5.3% by weight or more, 5.6% by weight or more, 5.9% by weight or more, 6.2% by weight or more, 6.5% by weight or more, 6.8% by weight or more, 7.0% by weight or more, 7.1% by weight or more, 7.2% by weight or more. , 7.3% by weight or more, or 7.4% by weight or more, and 10% by weight or less, 9.7% by weight or less, 9.4% by weight or less, 9.1% by weight or less, 8.8% by weight or less, 8.5% by weight or less, 8.2% by weight or less, 7.9% by weight. % or less, 7.8 weight% or less, 7.7 weight% or less, or 7.6 weight% or less.

In one embodiment, the ester-based oil may have a viscosity of 1 to 15 cps. In the present disclosure, a low-viscosity ester-based oil with a viscosity of 15 cps or less is used. This is because high-viscosity ester-based oils tend to give a sticky feeling and are applied thickly, so they are not suitable for thin and adhesive cosmetic compositions for lips.

Specifically, the ester-based oil has a viscosity of 1 cps or more, 2 cps or more, 3 cps or more, 4 cps or more, 5 cps or more, 6 cps or more, or 7 cps or more, 15 cps or less, 14 cps or less, 13 cps or more. It may be 12 cps or less, 11 cps or less, 10 cps or less, 9 cps or less, or 8 cps or less.

In one embodiment, the ester-based oil may be one or more selected from the group consisting of isodecylisononanoate, C12-15 alkylbenzoate, and ethylhexyl palmitate.

In one embodiment, the cosmetic composition for lips may be in stick form.

In one embodiment, when the lip cosmetic composition is in stick form, it may be applied thinly and evenly.

In one embodiment, when the cosmetic composition for lips is applied with the same force using a rheometer, the thickness may be 13 to 23 ㎛. Specifically, it is 13 ㎛ or more, 14 ㎛ or more, 15 ㎛ or more, 16 ㎛ or more, 17 ㎛ or more, or 18 ㎛ or more, and may be 23 ㎛ or less, 22 ㎛ or less, 21 ㎛ or less, 20 ㎛ or less, or 19 ㎛ or less. there is.

In one embodiment, the cosmetic composition for lips may have excellent color development.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention, and it will be obvious to those skilled in the art that the scope of the present invention should not be construed as limited by these examples.

For lips cosmetics Preparation of composition

Raw material name (% by weight) Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative example 2 Comparative Example 3 Comparative example 4 Comparative Example 5 Polyethylene (molecular weight 675 g/mol) 7.50 7.50 7.50 7.50 7.50 7.50 7.50 7.50 Polyethylene (molecular weight 400 g/mol) - - - - 7.50 - - - - Isodecylisononanoate 10.00 26.00 - - 10.00 - 10.00 - - C12-15 alkyl benzoate 11.00 - 26.00 - 11.00 11.00 11.00 - - Ethylhexyl Palmitate 5.00 - - 26.00 5.00 5.00 5.00 - - Propylene Glycol Dibenzoate - - - - - - - - 26.00 C18-21 Alkanes - - - - - 10.00 - 26.00 - coloring pigment 20.00 20.00 20.00 20.00 20.00 20.00 10.00 20.00 20.00 Micro crystalline wax 6.00 6.00 6.00 6.00 6.00 6.00 6.00 6.00 6.00 Sunflower Seed Wax 3.00 3.00 3.00 3.00 4.00 5.00 4.50 3.00 3.00 Hydrogenated polyisobutene 12.00 12.00 12.00 12.00 12.00 12.00 12.00 12.00 12.00 Bis-diglycerylpolyacylamadipate-2 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 Tridecyl trimellitate 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 Disteadimonium hectorite 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 Spices 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 octyldodecanol To 100

Lip cosmetic compositions of Examples 1 to 4 and Comparative Examples 1 to 5 were prepared with the compositions shown in Table 1 above. In order to eliminate differences in spreadability due to differences in hardness, the hardness of the cosmetic composition for lips prepared by varying the content of sunflower seed wax in the table above was set to about 125 (see Table 2 below). Sunflower seed wax does not affect the physical properties of lip cosmetic compositions other than hardness.

The coloring pigment itself was used as the unprocessed coloring pigment.

The linear polyethylene wax used in Examples 1 to 4 had a high melting point of 95°C and a molecular weight of 675 g/mol. The linear polyethylene wax used in Comparative Example 1 had a melting point of 85°C, which was lower than the linear polyethylene wax used in Examples 1 to 4, and had a low molecular weight of 400 g/mol.

Ester oil with a viscosity of 15 cps or less was used. The viscosity of the ester oil used was measured at 25°C for 60 seconds at 60 rpm according to the JSQI, Method Ⅱ, BL Type, rotor No.1 measurement method. Isodecylisononanoate has a viscosity of 4 to 7 cps, C12-15 alkylbenzoate has a viscosity of 6 to 10 cps, ethylhexyl palmitate has a viscosity of 7 to 12 cps, and propylene glycol dibenzoate has a viscosity of 6 to 10 cps. It was 10 to 13 cps.

Measurement of hardness of cosmetic composition for lips

The hardness of the cosmetic compositions for lips prepared with the compositions of Examples 1 to 4 and Comparative Examples 1 to 5 of Table 1 was compared and evaluated. Each sample was stored in a thermostat at 30°C for 24 hours, and then its hardness was measured using a rheometer (CR-300). When measuring hardness, the speed was set at 20 mm/min, and the penetration depth of the applicator was set at 20 mm.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Hardness (gf) 125 126 124 127 127 123 124 98 124

By comparing Examples 1 to 4 and Comparative Examples 1 to 5, it was confirmed that the difference in hardness was not significant. In other words, when measuring the thickness, color development, and adhesion of the lipstick, the hardness values were designed to be within a similar range to reduce differences in hardness.

Thickness measurement results

The thickness of the compositions of Examples 1 to 4 and Comparative Examples 1 to 5 was measured using a rheometer. A metal block weighing 100 g was placed on top and the same force (100 gf) was applied, and the thickness was measured using an SEM after applying the same number of rounds, twice.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative example 2 Comparative Example 3 Comparative example 4 Comparative Example 5 Application thickness (㎛) 18.8 18.5 19.0 18.8 41.1 71.3 19.5 80.6 25.8

It was confirmed that the composition of the example was applied at the thinnest thickness. This is because Comparative Example 1 used low molecular weight, low melting point linear polyethylene. In addition, this is because Comparative Example 4 used C _18-21 Alkane, a hydrocarbon-based oil rather than ester-based oil, and it was confirmed through Comparative Example 2 that hydrocarbon-based oil was applied thickly even when mixed with ester-based oil. . Comparative Example 3 was applied to a thickness similar to that of the Example, but was thin because the coloring pigment content was only 10% by weight. In the Example of the present disclosure, which had good spreadability even though it contained a high content of 20% by weight of the coloring pigment, does not match Comparative Example 5 used propylene glycol dibenzoate, and it was confirmed that the application thickness was thicker than that of the Example (see Figures 1 and 2).

Usability measurement results

We tested the color development, adhesion, and light feeling of use corresponding to the feeling of use . This test was conducted as an application test on the lips with 10 expert panelists aged between 20 and 40 years old. The closer it is to 1, the poorer the color development and adhesion, and the closer it is to 10, the better the color development and adhesion. Additionally, in the case of a light feeling of use, the closer it is to 1, the more stuffy and heavy the feeling of use is, and the closer it is to 10, the lighter and more refreshing the feeling of use. The results are shown in Table 4 below.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative example 2 Comparative Example 3 Comparative example 4 Comparative Example 5 Color development 9 9.1 9.2 9.1 8.7 8.8 4.7 8.8 8.9 Adhesion 8.5 8.6 8.7 8.7 7.2 6.1 7.5 5.1 7.9 light feeling 8.7 8.9 8.8 8.8 7.3 5.1 8.5 4.6 8.0

As can be seen from the above results, the examples show color development similar to Comparative Examples 1, 2, 4, and 5, but there is a significant difference in adhesion and light feeling of use. Compared to Comparative Example 3, it can be seen that the Example contained a larger amount of coloring pigment and thus had better color development, while exhibiting similar or improved adhesion and a light feeling of use as Comparative Example 3 containing a smaller amount of coloring pigment. there was.

Claims (8)

A cosmetic composition for lips,
Contains coloring pigments, linear polyethylene wax, and ester-based oil,
The content of the coloring pigment is 15 to 35% by weight based on the total weight of the cosmetic composition,
The linear polyethylene wax has a weight average molecular weight of 600 to 800 g/mol,
A cosmetic composition for lips, wherein the ester oil is at least one selected from the group consisting of isodecyl isononanoate and C12-15 alkylbenzoate. The cosmetic composition for lips according to claim 1, wherein the cosmetic composition has a hardness of 100 to 300 gf. The cosmetic composition for lips according to claim 1, wherein the linear polyethylene wax has a melting point of 90° C. or higher. delete The cosmetic composition for lips according to claim 1, wherein the content of the linear polyethylene wax is 5 to 10% by weight based on the total weight of the cosmetic composition. The cosmetic composition for lips according to claim 1, wherein the ester oil has a viscosity of 1 to 15 cps measured at 25°C. delete The cosmetic composition for lips according to claim 1, wherein the cosmetic composition for lips is in a stick form.