CROSS REFERENCE TO RELATED APPLICATIONS

This application is a National Stage of International Application No. PCT/KR2017/010287 filed Sep. 20, 2017, claiming priority based on Korean Patent Application No. 10-2016-0120826, filed Sep. 21, 2016.

TECHNICAL FIELD

An embodiment is directed to a liquid-type oil-in-water form cosmetic composition having a low viscosity, light texture, and high transparency, while exhibiting excellent moisturizing power and flexibility, by containing at least 3% by weight of oil in the composition.

BACKGROUND ART

In general, emulsified cosmetic products contain an oil phase and a water phase at the same time and thus can realize both advantages of them, so they are widely used as cosmetics.

Meanwhile, in order to satisfy consumers' aesthetic senses by differentiated appearance, studies on cosmetic compositions with a transparent appearance are continuing. As a method for preparing an emulsified cosmetic composition as a transparent formulation, a method of adjusting the refractive indices of the oil phase and water phase to similar values, a method of making a microemulsion by increasing the surfactant content and so on have been reported.

The method of preparing a transparent or semi-transparent emulsion by controlling the refractive indices of the water phase and oil phase is known to produce a transparent formulation only when the difference between the refractive indices of the water phase and oil phase is no more than 0.005. However, since the difference between the refractive indices of water, which is the main component of the water phase, and oil, which is the main component of the oil phase, is large, in order to reduce the difference between the refractive indices of the water phase and the oil phase, an oil having a relatively low refractive index should be selected among the oils, and glycerin, fatty acid, etc. having a relatively high refractive index should be added to the water phase. However, there is a problem that by these components used in the water phase, it has poor emulsification stability and becomes opaque over time.

In addition, in the case of making the microemulsion while increasing the surfactant content, there is a problem that since a large amount of surfactant may cause skin irritation, it is not suitable as a skin care product.

Therefore, it is necessary to develop an emulsified cosmetic composition having an excellent transparency while containing enough oil to impart moisturizing feeling and flexibility when applied to the skin.

PRIOR ART DOCUMENT

Patent Document

(Patent Document 1) Korean Patent No. 1295724, Transparent cosmetic composition.

DISCLOSURE

Technical Problem

The present inventors have made efforts to develop an oil-in-water form cosmetic composition having a dilute viscosity suitable for use in liquid products such as skin lotions, and having a transparent or semi-transparent appearance, even while containing oil to provide sufficient moisturizing power, and thus have completed the present invention.

Therefore, it is an object of the present invention to provide a liquid-type oil-in-water form cosmetic composition comprising oil and having a high transparency and a low viscosity.

Technical Solution

In order to solve the above problems, the present invention provides an oil-in-water form cosmetic composition, wherein the oil phase portions containing a surfactant and oil are dispersed in the water phase portion containing a polyhydric alcohol and water, and the average size of the emulsion particles is 200 nm or less and the viscosity is 1000 cps or less.

Advantageous Effects

The oil-in-water form cosmetic composition according to the present invention has a transparent or semi-transparent appearance, and exhibits low viscosity and light texture, even while exhibiting excellent moisturizing power and flexibility by comprising oil. Accordingly, the oil-in-water form cosmetic composition of the present invention can be realized as a skin lotion or essence type product having excellent feeling of use and high moisturizing power.

