JP-7855587-B2 - Water-in-oil emulsion cosmetic composition

Inventors

• 藤岡 健太
• 端 晃一

Assignees

• エルブイエムエイチ レシェルシェ

Dates

Publication Date

20260508

Application Date

20201222

Claims (7)

1. A water-in-oil emulsion cosmetic composition for skin, comprising (A) a hydrophobic pigment, (B) a film-forming agent containing silicon atoms, (C) a silicone-based surfactant having an HLB value of 2 to 8, a volatile oil, and (D) a non-volatile oil , (A) Component is a hydrophobic pigment in which one or more inorganic pigments, excluding calcium phosphate-based pigments, are surface-treated with a hydrophobic agent, excluding bisbenzoyl compounds. The ratio of the mass of component (B) to the total mass of components (C) and (D) is between 1.0 and 9.0. It does not contain fluoroether compounds. Component (B) is at least one compound selected from the group consisting of trialkylsiloxysilicate, polyalkylsilsesquioxane, (meth)acrylate silicone, and carbosiloxane dendrimer. A water-in-oil emulsion cosmetic composition having a volatile oil content of 25 to 55% by mass on a total basis.
2. The water-in-oil emulsion cosmetic composition for skin according to claim 1, wherein the hydrophobic agent is at least one compound selected from the group consisting of silicone compounds, silane compounds, amino acid derivatives, sugar derivatives, organic titanates, phospholipids, metallic soaps, fatty acids, oils, and organic polymers.
3. The water-in-oil emulsion cosmetic composition for skin according to claim 1 or 2 , further comprising at least one compound selected from the group consisting of polyols, spherical powders, and organically modified clay minerals.
4. The water-in-oil emulsion cosmetic composition for skin according to claim 3 , wherein the polyol content is less than 6% by mass on a total basis.
5. A water-in-oil emulsion cosmetic composition for skin according to any one of claims 1 to 4 , wherein the vibration mode is two-phase.
6. A cosmetic method for the care and/or makeup of keratin substances, comprising applying the water-in-oil emulsion cosmetic composition according to any one of claims 1 to 5 to the skin.
7. The makeup method according to claim 6 , wherein the water-in-oil emulsion cosmetic composition provides to the skin to which it is applied a non-transfer effect, a long-lasting effect, a high concealing effect, and a comfortable finish.

Description

This invention relates to a water-in-oil emulsion cosmetic composition. Foundation is used to make skin look beautiful by minimizing the appearance of unevenness and pores, and comes in various forms such as powder, liquid, and cream. To maintain a beautiful finish all day long, foundation needs to have good staying power. For example, Japanese Patent Publication No. 2005-255623 discloses a water-in-oil type foundation, which is said to have excellent lasting effect. Currently, with the COVID-19 pandemic occurring worldwide, wearing masks has become commonplace and essential. In this situation, in addition to the properties mentioned above, the property of foundation not transferring to the mask (non-transferability) becomes important. However, traditionally, wearing a mask while wearing makeup was rare, and even when it was, it was only for short periods. Therefore, the non-transferability of foundation was rarely an issue, and compositions that achieve this are currently unknown. The water-in-oil emulsion cosmetic composition according to this embodiment contains (A) a hydrophobic pigment, wherein component (A) is a hydrophobic pigment in which one or more inorganic pigments, excluding calcium phosphate-based pigments, are surface-treated with a hydrophobic agent, excluding bisbenzoyl compounds. Examples of inorganic pigments used for surface treatment include metal oxides such as titanium dioxide, iron oxide, zinc oxide, cerium oxide, aluminum oxide, red iron oxide, Prussian blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; and carbon black. Titanium dioxide is known as a white pigment, and iron oxide is known as a colored pigment (red, yellow, or black). By appropriately combining these, the desired color tone can be achieved. Note that inorganic pigments do not include calcium phosphate pigments such as hydroxyapatite. The hydrophobic agent may be at least one compound selected from the group consisting of silicone compounds, silane compounds, amino acid derivatives, sugar derivatives, organic titanates, phospholipids, metal soaps, fatty acids, oils, and organic polymers. It is preferable to use two or more hydrophobic agents. When using two hydrophobic agents, two of the silicone compounds, silane compounds, amino acid derivatives, and organic titanates are preferred. Note that bisbenzoyl compounds, such as 4-tert-butyl-4-4-methoxybenzoylmethane, are not included as hydrophobic agents. Examples of silicone compounds include dialkylpolysiloxanes such as monomethylpolysiloxane (methicone) and dimethylpolysiloxane (dimethicone). Examples of silane compounds include trialkylalkoxysilanes such as trimethylmethoxysilane and triethoxycaprylylsilane. The amino acid derivatives may be derivatives of amino acids such as glycine, alanine, sarcosine, proline, hydroxyproline, aspartic acid, glutamic acid, and lysine. As derivatives, acylated amino acids, which are acylated with fatty acids, are preferred. As fatty acids used for acylation, saturated or unsaturated fatty acids with 1 to 22 carbon atoms are preferred, and saturated or unsaturated fatty acids with 8 to 20 carbon atoms are more preferred. Examples of saturated fatty acids with 8 to 20 carbon atoms include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, and cerotic acid. Examples of unsaturated fatty acids with 8 to 20 carbon atoms include myristoleic acid, palmitoleic acid, sapienic acid, oleic acid, ekaidocic acid, vaccenic acid, linoleidic acid, alpha-linoleic acid, arachidonic acid, eicosapentaenoic acid, erucic acid, and docosahexaenoic acid. Examples of acylated amino acids include stearoyl glutamic acid, lauroyl glutamic acid, myristoyl glutamic acid, lauroyl aspartic acid, stearoyl lysine, lauroyl lysine, and myristoyl lysine. Preferred acylated amino acids are stearoyl glutamic acid, myristoyl glutamic acid, and lauroyl aspartic acid. The acylated amino acids may also be salts with sodium, potassium, calcium, magnesium, or aluminum. Examples of sugar derivatives used as hydrophobic agents include polysaccharide fatty acid esters such as dextrin palmitate, dextrin myristate, and dextrin isostearate, as well as glycolipids. Examples of organic titanates include titanate coupling agents such as isopropyltriisostearoyl titanate. Phospholipids include lecithin and hydrogenated lecithin, and fatty acids such as lauric acid, myristic acid, stearic acid, isostearic acid, and palmitic acid, as well as fatty acid esters and fatty acid amides, can also be used. Examples of metal soaps used as hydrophobic agents include stearic acid soap, 12-hydroxystearic acid soap, behenic acid soap, montanic acid soap, and lauric acid soap. Examples of oils include waxes, waxes, and fats. Examples of organic polymers include urethane compounds, acrylic compounds, (meth)acrylic compounds, polyisobutylene, and polyethylene. Further