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EP-4122443-B1 - COSMETIC COMPOSITION WITH SILICONE-MODIFIED POLYSACCHARIDE

EP4122443B1EP 4122443 B1EP4122443 B1EP 4122443B1EP-4122443-B1

Inventors

  • MORIYA HIROYUKI

Dates

Publication Date
20260506
Application Date
20210311

Claims (8)

  1. A cosmetic composition comprising the following components (A) and (B): (A) a silicone-modified polysaccharide comprising one or more silicone residues bonded to a hydroxyl group in a monosaccharide unit of the polysaccharide, the silicone residues being represented by the following general formula (1): wherein R 1 , R 2 , R 3 and R 4 are, independently of each other, groups selected from an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluorine-substituted alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms; n is an integer of 1 to 10; and a is an integer of 0 to 3, and having an average number of the silicone residues bonded to one mol of the monosaccharide unit of 0.001 mol or more and 0.1 mol or less, in an amount of 0.05% to 20% by mass, based on a total mass of the cosmetic composition, and (B) water in an amount of 5% to 99% by mass, based on the total mass of the cosmetic composition.
  2. The cosmetic composition according to claim 1, wherein the polysaccharide is selected from pullulan, cellulose, chitin, chitosan, starch, mannan, hyaluronic acid, and a derivative thereof.
  3. The cosmetic composition according to claim 2, wherein the polysaccharide is pullulan, and an average number of the silicone residues bonded to one mol of a glucose unit is 0.001 mol or more and 0.1 mol or less.
  4. The cosmetic composition according to claim 2 or 3, wherein the silicone-modified polysaccharide is biodegradable.
  5. The cosmetic composition according to any one of claims 1 to 4, further comprising at least one selected from propylene glycol, trimethylene glycol, dipropylene glycol, 1,3-butylene glycol, methylpropanediol, pentylene glycol, glycerol, diglycerol, ethylhexyl glycerol, triglycerol, polyglycerol, and ethanol.
  6. The cosmetic composition according to any one of claims 1 to 5, further comprising at least one selected from a silicone oil, a hydrocarbon oil, and an ester oil.
  7. The cosmetic composition according to any one of claims 1 to 6, further comprising one or more powder selected from the group consisting of inorganic powders, organic powders, surfactant metal salt powders, colored pigments, pearl pigments, metal powder pigments, tar pigments and natural pigments.
  8. The cosmetic composition according to any one of claims 1 to 7, wherein the cosmetic composition is in a form of an emulsion.

Description

TECHNICAL FIELD The present invention relates to a cosmetic composition comprising a water-soluble silicone-modified polysaccharide and water, as defined in the appended claims. BACKGROUND ART Previously, silicone-modified polysaccharides obtained by modifying silicone with respect to polysaccharides have been studied (Patent Documents 1 and 2). For example, Patent Document 1 discloses a water-stable siloxane-containing cellulose derivative exhibiting properties of both cellulose and silicone. Patent Document 2 discloses stable siloxane-containing pullulan exhibiting properties of both pullulan and a silicone compound. Blending silicone-modified polysaccharides in cosmetics has also been studied (Patent Documents 3 to 6). Patent Document 3 discloses a sunscreen cosmetic comprising a specific siliconized polysaccharide compound in combination with an organic ultraviolet absorber. Patent Document 4 discloses a water-in-oil type emulsified cosmetic comprising a siliconized polysaccharide compound. Patent Document 6 discloses a cosmetic composition comprising siliconized pullulan for the eye area. As disclosed in Patent Documents 3 to 6, cosmetics comprising silicone-modified polysaccharides have high water resistance and oil resistance, and also have an excellent feeling during use. See also US 2017/224608A1. PRIOR LITERATURES PATENT LITERATURES Patent Document 1: Japanese Patent Application Laid-Open No.-Hei 6-145201Patent Document 2: Japanese Patent Application Laid-Open No.-Hei 8-134103Patent Document 3: Japanese Patent Application Laid-Open No.-Hei 10-29921Patent Document 4: Japanese Patent Application Laid-Open No.-2001-278729Patent Document 5: WO 2012/133293Patent Document 6: Japanese Patent Application Laid-Open No.-2017-218413 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION However, conventional silicone-modified polysaccharides have a high proportion of silicone. Such silicone-modified polysaccharides are mainly blended in the oil phase, so that the silicone-modified polysaccharides are blended in oil-based cosmetics. Therefore, they have restrictions on blending, in addition to problems such as oiliness and stickiness, which are characteristic of oil-based cosmetics. In addition, a problem with silicone-modified polysaccharides is that since they have excessive water resistance, they cannot be removed without special oil cleansing. In contrast, a problem with unmodified polysaccharides is that since they do not have water resistance, cosmetics come off or are deteriorated by sweat or moisture. Therefore, there has been a demand for silicone-modified polysaccharides that can be blended in the aqueous phase and that have excellent water resistance and oil resistance. In addition, the environment surrounding raw materials for cosmetics in recent years has led to a growing need for naturally derived raw materials and biodegradable raw materials that decompose in the natural world from the viewpoint of sustainability. The present invention has been made in view of the above-described problems, and one of the objects of the present invention is to provide a cosmetic composition that comprises water-soluble silicone-modified polysaccharides and water, is capable of being blended in an aqueous phase of an emulsion, and improves the feeling during use, such as oiliness and stickiness. Furthermore, another object of the present invention is to provide a cosmetic composition that has water resistance and oil resistance, has excellent makeup durability, and does not come off with water but can be removed with warm water. MEANS FOR SOLVING THE PROBLEMS As a result of diligent studies to improve the feeling during use and usability of cosmetics, the present inventor has found that a silicone-modified polysaccharide with a controlled silicone modified ratio has excellent biodegradability, good water repellency, and good oil repellency, is blended in aqueous cosmetics and provides a cosmetic composition having a refreshing feeling. That is, the present invention has found that a cosmetic composition comprising a silicone-modified polysaccharide having at least one silicone residue represented by the following general formula (1), wherein an average number of the silicone residues bonded to one mol of a monosaccharide unit is 0.1 mol or less, is not oily or sticky, has water resistance and oil resistance, has excellent makeup durability, and is removed with warm water while not coming off with water, and thus, the present invention has been achieved. This cosmetic composition not only has a pleasant feeling during use and no stickiness or oiliness, but also has excellent durability. In addition, the present inventor has found that silicone-modified polysaccharides having such a low modified ratio and water solubility serve as a water thickening agent and have an effect of stabilizing cosmetics. Thus, the present invention provides a cosmetic composition comprising the following components (A) and (B):