CROSS REFERENCE TO RELATED APPLICATIONS

This application is a National Stage of International Application No. PCT/KR2017/010589 filed Sep. 26, 2017, claiming priority based on Korean Patent Application No. 10-2016-0126873, filed Sep. 30, 2016, and Korean Patent Application No. 10-2017-0123425, filed Sep. 25, 2017.

TECHNICAL FIELD

The present invention relates to a capsule comprising a pigment and a method for producing the same. More specifically, the present invention relates to a capsule which comprises therein a pigment which is likely to be discolored due to external environment, and thereby can easily crack or break and cause color development when applied to the skin, while isolating the pigment from the external environment, and a method for producing the same.

BACKGROUND ART

Pigments are of great importance in the cosmetic field, where altering skin and hair color for aesthetic purposes can be desirable.

However, some pigments used in cosmetics have problems in that when applied to cosmetics requiring various environments, they are already discolored during a formulation process due to unstable properties of the dye itself, or have weak stability against light. Thus, in order to solve such problems, various methods such as emulsification, encapsulation and the like have been developed.

Meanwhile, the capsule applied to cosmetics should be easily cracked or broken under pressure when a user applies to a skin according to its use, so that the pigment contained in the capsule can be easily expressed.

That is, there is a need for a capsule which can effectively isolate a pigment from external environment and thus exhibits excellent storage durability, color hiding power, etc., and which can be easily cracked or broken by pressing, rubbing, wiping or scrubbing with a hand or a tool (cotton cloth, sponge, paper, brush, etc.), thereby allowing the pigment included therein to develop color sufficiently.

DETAILED DESCRIPTION OF THE INVENTION

Technical Problem

In order to solve the above-mentioned problems, the present inventors have developed a spherical capsule structure in which silica and a pigment are mixed by using a polymer as a binder, in order that the capsule is stable at a high temperature and does not easily crack or break during the formulation process and thereby stably maintains the pigment, but when the formulation is applied to the skin, the capsule breaks and thereby causes color development.

Therefore, it is one object of the present invention to provide a capsule structure including a pigment, capable of causing color development of the pigment only when applied to the skin, while protecting the pigment from the external environment and ensuring the stability of the pigment.

Technical Solution

In order to achieve the object above, one aspect of the present disclosure provides a pigment capsule including a pigment, wherein the capsule has an interior in which silica, a pigment and a titanium dioxide pigment are dispersed, and an exterior covered with a polymer binder having a glass transition temperature of 130° C. or higher, and wherein a C3-C9trivalent carboxylic acid is contained in the interior of the capsule, and a method for producing the same.

Advantageous Effects

The capsule of the present invention can solve the problem related to instability of the pigment against the environment by completely isolating the pigment from the external environment, and also, the capsule is stable during the formulation process, but when applied to the skin, it is easily cracked or broken by force applied while rubbing or scrubbing with a hand or a tool, thereby causing color development easily.

Further, the color development of the pigment is blocked and thus the color due to pigment does not appear in the product, but the color development occurs after the capsule is applied to the skin, which may arouse users' interests when using the product.

