KR20150084102A - Cosmetic composition stably containing acrylates copolymer - Google Patents

Abstract

The present invention relates to a cosmetic composition stably comprising a waterborne polymer and, more specifically, to a cosmetic composition stabilizing an acrylate copolymer as a waterborne polymer, thereby stably maintaining a formulation under low temperature conditions.

Description

TECHNICAL FIELD The present invention relates to a cosmetic composition stably containing an acrylate copolymer,

The present invention relates to a cosmetic composition containing a water-dispersible polymer stably, and more particularly, to a cosmetic composition capable of stabilizing an acrylate copolymer which is an aqueous dispersion polymer and stably maintaining the formulation even under low-temperature conditions.

Water Born Polymer (WBP) is easily dispersed in water by various emulsification methods such as acrylic (ACR), urethane (PUD), polyester (PS) and silicone after synthesis or synthesis, Coagulation and separation. In some cases, it is accompanied by the use of small amounts of emulsifiers, co-solvents and additives.

Among water-dispersed polymers, acrylate copolymer is a water-dispersible polymer, and since it is a raw material having excellent turbidity-imparting property, it has a pH of 6.5 If it goes over, it becomes transparent and becomes viscous, which is a component that can act as a rheology control agent in cosmetics. In addition, it is a substance used as a suspending agent component which is easy to control the turbidity in the formulation through the control of the amount, and is a component which makes it possible to form a suspension formulation without alcohol because of a low influence by alcohol.

However, despite this suspension function, the acrylate copolymer is a component which is easily precipitated or agglomerated in the freezing condition. Therefore, not only is it stored in a freezer when stored in a cosmetic product, or turbidity is changed during distribution, And the like. Therefore, there is a limit to use in cosmetics as a component which is difficult to maintain its stability.

Korean Published Patent Application No. 2007-0120189 (Publication Date: December 21, 2007)

Accordingly, the present inventors have searched for a method for stably dispersing an acrylate copolymer having excellent functions as a suspending agent and a thickening agent in a formulation even at a low temperature. As a result, the use of betaine, which is a cationic material, It is possible to form a non-sedimented condition, and this problem can be solved, and the present invention is completed.

Accordingly, it is an object of the present invention to provide a cosmetic composition in which an acrylate copolymer is stably dispersed even at a low temperature.

In order to accomplish the above object, the present invention provides a cosmetic composition comprising an acrylate copolymer and an amphoteric substance.

By using an acrylate copolymer as a water dispersion polymer together with betaine having a cationic property, it is possible to effectively block the denaturation and precipitation of an acrylate copolymer due to a decrease in temperature, thereby maintaining the suspension characteristics of an acrylate copolymer for a long time, So that it is possible to provide a cosmetic composition which provides more stable suspension visualization.

The present invention relates to a cosmetic composition capable of maintaining a stable dispersion state in a formulation by preventing denaturation and precipitation of an acrylate copolymer regardless of the temperature, and a cationic material is used for this purpose.

The acrylate copolymer used in the present invention is an aqueous dispersion polymer which provides suspension visualization of the formulation, and is contained in an amount of 0.01 to 2% by weight based on the total weight of the composition. If the content is less than 0.01% by weight, the suspension has little effect on the degree of suspension. If the content is more than 2% by weight, the formulation becomes very suspended and the difference in the degree of suspension is insignificant.

The compositions of the present invention use amphoteric materials together to stabilize the acrylate copolymer, preferably betaine.

Betaine is an amphoteric moisturizer derived from glycine, an amino acid, and a natural ingredient extracted and purified from molasses, a by-product of sugar beet. It exists in many animals and plants, especially in the human liver. Betaine acts as an intermediate metabolite of living organisms participating in the first methionine synthesis process. Second, it is contained in the tissues of various living organisms and acts as a natural moisturizing factor safe for humans because of its excellent moisturizing effect. Due to such characteristics, betaine has been mainly used as a safe natural moisturizing agent in cosmetics, but in the present invention, it is used as a stabilizer for an acrylate copolymer, and these characteristics are revealed by the present invention.

The types of betaines that can be used include, but are not limited to, Aminocoat, betaine salicylate, and the like.

In the composition of the present invention, the amount of betaine used in the composition is not particularly limited, but is preferably not more than 10% by weight based on the total weight of the composition, more preferably not more than 8% by weight based on the total weight of the composition . This is because the feeling of use of betaine is not good, and when it is used in cosmetics in large quantity, the feeling of use of the formulation may be deteriorated. When the content of betaine is more than 4%, the weight ratio of acrylate copolymer to betaine is stable to 1: 2, while when the content of betaine is less than 4%, the weight ratio of acrylate copolymer to betaine is about 1:10 It is preferable to blend them. Therefore, the lower limit weight is limited to 0.1%, because the blending range of the acrylate copolymer is 0.01 to 2%.

In the composition of the present invention, the mixing ratio of the acrylate copolymer and the betaine is not particularly limited, but is preferably 1: 2 to 1:15, more preferably about 1:10 by weight. However, when the content of betaine is 4% by weight or more based on the total weight of the composition, the stability of the formulation can be maintained even if the content of the acrylate copolymer is 2% by weight.

The components included in the cosmetic composition of the present invention include components commonly used in cosmetic compositions in addition to the acrylate copolymer as a suspending agent component, and include conventional adjuvants such as stabilizers, emulsifiers, solubilizers, pigments and fragrances do. The cosmetic composition of the present invention may be formulated into any of the conventionally prepared formulations and may be formulated into solutions, suspensions, emulsions, pastes, gels, creams, lotions, powders, oils, But is not limited thereto. More specifically, it can be prepared as a skin, lotion, cream, essence, eye cream, pack or spray formulation.

Hereinafter, the present invention will be described in more detail by way of examples. However, these embodiments are intended to illustrate the present invention and not to limit the scope of the present invention.

[Reference Example] Preparation of Examples and Comparative Examples

Cosmetic formulations of Examples 1 to 4 and Comparative Examples 1 to 7 containing an acrylate copolymer (trade name: ACEcare 30KC, manufacturer: KCI Limited) were prepared according to the compositions shown in Tables 1 and 2 below.

Examples 1 to 4 contain an acrylate copolymer and betaine according to the present invention, Comparative Examples 1 to 3 contain an appropriate ratio of acrylate copolymer and betaine exceeding the proper ratio, And Comparative Examples 5 to 7 stably maintain the acrylate copolymer using a nonionic surfactant, a cationic surfactant and an anionic surfactant.

The compositions of Examples 1 to 4 and Comparative Examples 1 to 7 were prepared by firstly adding the components shown in Tables 1 and 2 to purified water in order and dispersing and dissolving them.

ingredient Example 1
(weight%) Example 2
(weight%) Example 3
(weight%) Example 4
(weight%) Comparative Example 1
(weight%) Comparative Example 2
(weight%) Comparative Example 3
(weight%) Number
Prize Purified water To 100 To 100 To 100 To 100 To 100 To 100 To 100 glycerin 5 5 5 5 5 5 5 Butylene glycol 5 5 5 5 5 5 5 Disodium EDTA 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Acrylate copolymer 0.53 0.8 2 2 2 0.5 0.1 ethanol 5 5 5 5 5 5 5 Betaine 8 8 8 4 2 3 1.5 Polysorbate 20 0 0 0 0 0 0 0 Stearamidopropyl dimethylamine 0 0 0 0 0 0 0 Ammonium lyase sulfate 0 0 0 0 0 0 0

ingredient Comparative Example 4
(weight%) Comparative Example 5
(weight%) Comparative Example 6
(weight%) Comparative Example 7
(weight%) Number
Prize Purified water To 100 To 100 To 100 To 100 glycerin 5 5 5 5 Butylene glycol 5 5 5 5 Disodium EDTA 0.05 0.05 0.05 0.05 Acrylate copolymer 2 2 2 2 ethanol 5 5 5 5 Betaine 0 0 0 0 Polysorbate 20 0 4 0 0 Stearamidopropyl dimethylamine 0 0 4 0 Ammonium lyase sulfate 0 0 0 4

[Test Example 1] Evaluation of stabilization

In order to confirm the stabilization effect of the acrylate copolymer according to the temperature, Examples 1 to 4 and Comparative Examples 1 to 7 were stored at room temperature and -30 캜 for 4 weeks, respectively, and then the change in the suspension of the formulation was measured. Each turbidity was measured with a turbidity meter (HANNA HI 98703). The sample at -30 ° C was also measured by exposing it at room temperature for 6 hours. The results are shown in Table 3 below.

Acrylate Copolymer Suspension (NTU) Example 1 Room temperature 312 -30 ° C 313 Example 2 Room temperature 347 -30 ° C 349 Example 3 Room temperature 457 -30 ° C 461 Example 4 Room temperature 453 -30 ° C 472 Comparative Example 1 Room temperature 455 -30 ° C Precipitation (not measurable) Comparative Example 2 Room temperature 309 -30 ° C Precipitation (not measurable) Comparative Example 3 Room temperature 184 -30 ° C 182 Comparative Example 4 Room temperature 453 -30 ° C Precipitation (not measurable) Comparative Example 5 Room temperature 519 -30 ° C 398 Comparative Example 6 Room temperature Precipitation (not measurable) -30 ° C Precipitation (not measurable) Comparative Example 7 Room temperature 459 -30 ° C Precipitation (not measurable)

In Table 3, in the case of Examples 1 to 4 containing an acrylate copolymer and betaine in a proper mixing ratio according to the present invention, the difference in suspension between room temperature and freezing was less than 20 NTU. In the case of freezing condition, The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1.

On the other hand, it can be confirmed that the precipitation phenomenon occurs in the case of Comparative Examples 1 and 2, which are out of the range of the proper mixing ratio of the acrylate copolymer and the betaine. In addition, in the case of Comparative Example 3, the precipitation phenomenon did not occur, but the content of the acrylate copolymer contained was low, so that it did not provide a sufficient suspension visualization effect.

In Comparative Example 4 in which the stabilization condition was not set, the suspension was maintained at room temperature, but the suspension was not measured due to the precipitation in the freezing condition. In Comparative Example 5 in which the other stabilization method was applied, It was found that suspended solids were found on the aqueous solution, and the suspension was measured at a lower level in the freezing condition than in the room temperature condition.

In the case of Comparative Example 6, as soon as the suspending agent was added, the precipitate was immediately precipitated and the measurement became impossible. In the case of Comparative Example 7, there was no problem at room temperature, but precipitation occurred under freezing conditions.

Claims (6)

Acrylate copolymer and an amphoteric substance. The cosmetic composition according to claim 1, wherein the amphoteric substance is betaine. The cosmetic composition according to claim 1, wherein the acrylate copolymer is contained in an amount of 0.01 to 2% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, wherein the amphoteric substance is contained in an amount of 0.1 to 10% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, wherein the acrylate copolymer and the amphoteric substance are blended in a weight ratio of 1: 2 to 1:15. The cosmetic composition according to any one of claims 1 to 5, wherein the low temperature stability of the composition is improved.