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JP-2026075115-A - Hygroscopic compositions and cosmetics

JP2026075115AJP 2026075115 AJP2026075115 AJP 2026075115AJP-2026075115-A

Abstract

[Challenge] Development of a moisturizing ingredient that can sufficiently improve the water retention capacity of the stratum corneum, which is the skin's barrier layer. [Solution] A cosmetic containing (A) sucrose and (B) sodium chloride. [Selection Diagram] None

Inventors

  • 早川 悠貴
  • 森川 優輝
  • 蘇木 佳彦

Assignees

  • 花王株式会社

Dates

Publication Date
20260507
Application Date
20260227
Priority Date
20240827

Claims (5)

  1. (A) A cosmetic product containing sucrose and (B) sodium chloride.
  2. The cosmetic composition according to claim 1, wherein the molar ratio (A/B) of component (A) to component (B) is 0.1 or more and 10 or less.
  3. A cosmetic product containing (A) sucrose, (B) sodium chloride, and (C) serine.
  4. A cosmetic composition according to any one of claims 1 to 3, comprising (A) sucrose, (B) sodium chloride, and (C) serine within the range enclosed by the following coordinates in a three-phase diagram. • Molar ratio percentages of components (A)(X), (B)(Y), and (C)(Z) (X, Y, Z) = (90, 10, 0), (10, 10, 80), (10, 90, 0)
  5. The cosmetic composition according to claim 4, comprising (A) sucrose, (B) sodium chloride, and (C) serine within the range enclosed by the following coordinates in a three-phase diagram. • Molar ratio percentages of components (A)(X), (B)(Y), and (C)(Z) (X, Y, Z) = (70, 20, 10), (50, 20, 30), (50, 10, 40), (10, 10, 80), (10, 80, 10)

Description

This invention relates to hygroscopic compositions and cosmetics. Since moisture plays a crucial role in maintaining youthful skin, cosmetics contain various moisturizing ingredients. For example, pyrrolidone carboxylate, a type of natural moisturizing factor, intercellular lipid components, oily components, polyhydric alcohols, and sodium hyaluronate are used. Non-patent document 1). Takeo Mitsui, Moisturizers, New Cosmetology (Nanzando), pp. 143-147 (1993) This diagram shows the criteria for determining deliquescence.This figure shows the range in which excellent deliquescence and water absorption can be obtained when the results of Table 1 are represented as a three-phase diagram.This figure shows the range in which excellent deliquescence and water absorption can be obtained when the results of Table 2 are represented as a three-phase diagram.This figure shows the range in which superior deliquescence and water absorption can be obtained when the results of Table 2 are represented as a three-phase diagram.This figure shows the effect of a composition (aqueous solution) containing sucrose, sodium chloride, and serine on the moisture content of the stratum corneum.This figure shows the change in stratum corneum moisture content after 1 hour and 8 hours for the case of sucrose as one component, sucrose and sodium chloride as two components, and sucrose, sodium chloride and serine as three components. Red: Molar amount similar to Example 1. Blue: Molar amount similar to Example 8. Terms used herein shall be used in the sense commonly used in the art unless otherwise specified. In this specification, deliquescence refers to the phenomenon in which a substance absorbs moisture from the air and spontaneously becomes an aqueous solution. In other words, a substance with high deliquescence can spontaneously hold water and can be said to have high water retention capacity. Deliquescence initiation humidity refers to the relative humidity at which the test component or a mixture of the test components begins to deliquify. Here, the measurement conditions for the deliquescence initiation humidity are 20°C to 35°C and 1 atmosphere. Specifically, 72% The RH condition is 20°C, and the 67% RH condition is 35°C. More specifically, the test components (total amounts of (A), (B), and (C)) are mixed in powder form, and 72% Deliquescent properties are determined when the water absorption per 1000 μmol of the test component is 0.015 g or more over 3 days under RH conditions, and furthermore, under 67% RH conditions, per 1000 μmol of the test component... For this purpose, a high degree of deliquescence was determined when the water absorption amount was 0.015 g or more. One aspect of the present invention is a composition containing (A) sucrose and (B) sodium chloride, wherein the deliquescence onset humidity at 20°C is 72% RH or less. Component (A) of the composition of the present invention is sucrose. Sucrose, also known as sucrose sugar, is a disaccharide in which glucose and fructose are linked by an α-1,2-glycosidic bond. Sucrose alone is not hygroscopic. Sodium chloride (B) is a sodium chloride and is known to deliquesce at a relative humidity of approximately 80%, but it is not known that mixing it with sucrose in a specific ratio lowers the deliquescing initiation humidity. As described in the examples below, the mixture of (A) sucrose and (B) sodium chloride is It deliquesces by absorbing moisture from the air at a relative humidity of 72%. Therefore, one aspect of the present invention is a composition containing (A) sucrose and (B) sodium chloride, the deliquescing initiation humidity being 72% or less. Furthermore, compositions containing (A) sucrose and (B) sodium chloride have excellent deliquescent properties, and are therefore useful as desiccants for absorbing water. Accordingly, another aspect of the present invention is a desiccant composition containing (A) sucrose and (B) sodium chloride. Also, due to similar effects, the above composition can be used as a humectant. From the viewpoint of obtaining excellent deliquescence, the molar ratio (A/B) of component (A) to component (B) in the composition of the present invention is preferably 0.1 to 10, more preferably 0.2 to 6, and even more preferably 0.25 to 5. Furthermore, the total content of component (A) and component (B) in the composition of the present invention is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, from the viewpoint of obtaining excellent deliquescence. A concentration of 0.4% by mass or more is more preferable, and 0.5% by mass or more is even more preferable. The upper limit of the total amount is 100% by mass. The composition of the present invention may contain various components as long as they do not adversely affect its deliquescence. However, if component (A) and component (B) exist in particulate form, they only need to be in contact with each other, and any component that does not absorb excessive m