JP-2026075322-A - Oil-in-water emulsion cosmetic

Abstract

[Problem] To provide an oil-in-water emulsion cosmetic that forms an elastic cosmetic film and provides a firming sensation that lifts the skin without causing tightness, as well as a non-greasy moisturizing sensation that lasts for a long time. [Solution] The following components (A) to (D) An oil-in-water emulsion cosmetic comprising (A) xanthan gum crosspolymer, (B) sugar alcohol, (C) high viscosity hydrocarbon, and (D) higher alcohol and/or hydrocarbon wax. [Selection Diagram] None

Inventors

• 河内 佑介

Assignees

• 株式会社ナリス化粧品

Dates

Publication Date

20260508

Application Date

20241022

Claims (4)

1. The following components (A) to (D) An oil-in-water emulsion cosmetic comprising (A) xanthan gum crosspolymer, (B) sugar alcohol, (C) high viscosity hydrocarbon, and (D) higher alcohol and/or hydrocarbon wax.
2. The oil-in-water emulsion cosmetic composition according to claim 1, comprising 0.01 to 0.3% by mass of component (A).
3. The oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein component (B) contains 0.5 to 5.0% by mass of one or more sugar alcohols selected from sorbitol, xylitol, maltitol, and mannitol.
4. The oil-in-water emulsion cosmetic composition according to claim 3, wherein component (C) contains 1.0 to 8.0% by mass of one or more high-viscosity hydrocarbons selected from heavy liquid isoparaffins and petrolatum.

Description

The present invention relates to an oil-in-water emulsion cosmetic, and more particularly to an oil-in-water emulsion cosmetic that, by containing specific components, forms a flexible and stretchable cosmetic film, providing a firming sensation that lifts the skin without tightness, and a non-greasy moisturizing sensation that lasts for a long time. Human skin experiences various problems as it ages. For example, wrinkles and sagging are caused by skin aging due to aging and photoaging due to ultraviolet rays. To address these problems, many cosmetics are commercially available that provide firmness and elasticity to the skin. For instance, many anti-aging cosmetics exist that provide firmness and elasticity by incorporating various moisturizing ingredients with excellent water retention and absorption properties, or by incorporating film-forming agents and waxes. However, these methods often result in a feeling of tightness or stickiness, even while providing firmness, and do not provide sufficient satisfaction. For example, a cosmetic that provides excellent firmness by combining a water-soluble film-forming agent such as polyvinyl alcohol, a water-soluble moisturizer, and a specific ester oil has been disclosed (Patent Document 1). Furthermore, emulsifying oils with different melting points, volatile oils, and liquid higher alcohols using an oleic acid-based nonionic surfactant achieves both firmness and skin-softening effects from volatile oils (Patent Document 2), but it cannot be expected to maintain firmness and moisturizing effects until the next morning. To give skin firmness, solid, high-melting-point waxes and film-forming agents are often used. Examples include paraffin wax, beeswax, and trimethylsiloxysilicate. However, these materials form a strong cosmetic film on the skin, restricting skin movement and providing both firmness and tightness, sometimes resulting in an unpleasant feeling. Furthermore, the cosmetic film breaks down over time due to skin movement, failing to provide a long-lasting feeling of firmness. While it's possible to impart flexibility to cosmetic films by incorporating polymers and film-forming agents that create a flexible film, in many cases, this alone is insufficient to provide adequate moisturizing and firming effects. Furthermore, simply combining such materials—even incorporating hard waxes to achieve sufficient firmness—makes it difficult to form a flexible cosmetic film on the skin. As described above, while the firming effect of oil-in-water emulsion cosmetics has been studied for some time, even when using methods such as incorporating waxes or film-forming agents to achieve firmness, it has been extremely difficult to form a cosmetic film that provides a satisfying level of firmness and moisture without feeling tight or sticky, and this has been a major challenge in the development of anti-aging cosmetics. Japanese Patent Publication No. 2007-269723Japanese Patent Publication No. 2012-214448 The present invention will be described in more detail below. Unless otherwise noted, when the amount of each component is expressed in "%" below, it refers to mass percentage. In this invention, component (A), xanthan gum crosspolymer, is a polymer having a structure in which xanthan gum produced by fermentation or the like is crosslinked with a divalent organic acid or a salt thereof. It is used as a film-forming agent and a water-soluble thickener. The divalent organic acid is not particularly limited, but examples include glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, and sebacic acid, with sebacic acid or a salt thereof being preferred. The amount of component (A) is not particularly limited, but is preferably 0.005 to 0.5% of the total amount of cosmetic. More preferably, it is 0.01 to 0.3%. Within this range, a good balance between the flexibility and firmness of the cosmetic film is maintained, and there is a tendency for less stickiness. In the present invention, component (A) can be used as one or in combination of two or more types. Component (B) Sugar alcohols generally refer to carbohydrates obtained by adding hydrogen to the carbonyl group of a carbohydrate (reduction reaction). Examples include sorbitol, xylitol, maltitol, reduced starch syrup, erythritol, treitol, arabinitol, ribitol, isitol, galactitol, and mannitol. The amount of component (B) sugar alcohol in the cosmetic composition of the present invention is not particularly limited, but is preferably 0.1 to 10.0% by mass of the total amount of the cosmetic composition. More preferably, it is 0.5 to 5.0% by mass. Within this range, the balance between flexibility, firmness, and moisturizing properties of the cosmetic film is good, and there is a tendency for less stickiness. In this invention, component (B) can be used alone or in combination of two or more components. In this invention, component (C), high-viscosity hydrocarbon, refers to a hydrocarbon whose viscosity, measure