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EP-4011456-B1 - SOLID SHAMPOO COMPOSITION FOR HAIR

EP4011456B1EP 4011456 B1EP4011456 B1EP 4011456B1EP-4011456-B1

Inventors

  • MORI, Norifumi
  • IMAI, DAISUKE
  • HOSOI, Yoshishige
  • ONO, KENGO

Dates

Publication Date
20260506
Application Date
20210113

Claims (10)

  1. A solid hair detergent composition comprising (A) an alkali metal cocoyl isethionate salt, (B) cationized guar gum, and (C) water, wherein the content of the component (A) is 55 to 80 wt%, and wherein the content of the component (B) is 0.05 to 1.5 parts by weight per 1 part by weight of the component (C).
  2. The solid hair detergent composition according to claim 1, wherein a content of the component (B) is 1 to 20 parts by weight per 100 parts by weight of the component (A).
  3. The solid hair detergent composition according to claim 1 or 2, the composition comprising 5 to 25 wt% of the component (C).
  4. The solid hair detergent composition according to any one of claims 1 to 3, further comprising (D) a cationized polymer other than cationized guar gum.
  5. The solid hair detergent composition according to claim 4, wherein the component (D) is a polymer containing a diallyl dimethyl quaternary ammonium halide as a constitutional unit.
  6. The solid hair detergent composition according to claim 4 or 5, wherein a content of the component (D) is 0.1 to 10 parts by weight per 100 parts by weight of the component (A).
  7. The solid hair detergent composition according to any one of claims 1 to 6, further comprising (E) a polyhydric alcohol.
  8. The solid hair detergent composition according to claim 7, wherein a content of the component (E) is 0.5 to 10 parts by weight per 100 parts by weight of the component (A).
  9. The solid hair detergent composition according to claim 7 or 8, wherein the content of the component (E) is 0.05 to 0.5 parts by weight per 1 part by weight of the component (C).
  10. The solid hair detergent composition according to any one of claims 1 to 9, further comprising (F) a coconut oil fatty acid and/or (G) an alkali metal isethionate salt.

Description

TECHNICAL FIELD The present invention relates to solid hair detergent compositions. More specifically, the present invention relates to a solid hair detergent composition that achieves both the handleability of the agent when used and the crack suppression property during storage. BACKGROUND ART A hair detergent composition generally contains a surfactant such as an anionic surfactant and an amphoteric surfactant that exhibit detergency and lathering power, and a thickener that increases the viscosity of the composition. According to Non-Patent Document 1, by blending a cationic polymer in a hair detergent composition, the anionic surfactant and the cationic polymer form a coacervate, and the coacervate improves the feeling of use in shampoo rinsing. The coacervate technology has been applied to a variety of hair detergent compositions. For example, Patent Document 1 discloses an aqueous hair detergent containing an anionic surfactant, a predetermined cationized hydroxypropyl cellulose, and a predetermined monoalkyl glyceryl ether or monoalkenyl glyceryl ether. Patent Document 2 discloses a hair detergent composition containing an anionic surfactant, an amphoteric surfactant, a cationic polymer, and a predetermined polyoxyalkylene alkylamine. Further, Patent Document 3 discloses a shampoo composition containing an N-long chain acyl glutamate, an amphoteric surfactant, a water-soluble polymer having cationic dissociation, and polyoxyalkylene fatty acid monoisopropanolamide, and having a pH of 4.0 to 6.0 at 25°C. Meanwhile, solid hair detergent compositions (shampoo bar, solid shampoo) have been drawing attention recently from the viewpoint of environmental problems of plastics and the like. Solid hair detergent compositions are marketed as commercial products in Non-Patent Document 2, Non-Patent Document 3, etc., and are designed using surfactants such as sodium cocoyl isethionate, sodium cocoalkyl sulfate, and sodium sulfosuccinate. Patent document 4 relates to cosmetic compositions, in particular for cleaning or washing keratin materials, in particular the hair, which are in flexible solid form. These compositions comprise from 25% to 70 wt-% anionic surfactants and one or more types of full solid particles, said composition comprising at least one anionic surfactant chosen from acyl isethionates. Preferably, the total amount of acyl isethionates in the composition ranges from 12% to 50 wt-%. PRIOR ART DOCUMENTS NON-PATENT DOCUMENTS Non-Patent Document 1: Journal of the Society of Cosmetic Chemists of Japan, Vol. 38, No. 3, pp. 211-219, 2004Non-Patent Document 2: Scalp care soap "Savon Mauve" all components, [online], P.F.C.D. Japan Inc., [retrieved on 11 August 2020], retrieved from the Internet: <URL: https://www.pgcd.jp/promotion/scalpcare/trial/09/?argument=SIMOb79c&dmai=a5e90 4ca4c82a9&utm_source=ca_google&utm_medium=cpc&utm_campaign=brand&utm_t erm=0000051&gclid=CjwKCAjw4MP5BRBtEiwASfwAL93god9o-4dEffeWj6vgJ6HxFVkwf14_aV3w2SdhpGD8blDMYcp_9hoCFJQQAvD_BwE>Non-Patent Document 3: Ethique Shampoo Bar Pinkalicious, [online], P.S. International Co., Ltd., [retrieved on 11 August 2020], retrieved from the Internet <URL: https://ethicame.com/shop/products/ET000109> PATENT DOCUMENTS Patent Document 1: JP 2012-232933 APatent Document 2: JP 2015-048307 APatent Document 3: WO 2016/067853 APatent Document 4: US 10,555,890 B2 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION As for solid skin detergent compositions for cleansing faces and whole bodies which are generally widespread, an appropriate small amount of agent can be easily taken by rolling the solid agent on a hand when a relatively narrow surface area such as a face is washed, and an appropriate relatively large amount of agent can be easily taken by rubbing the solid agent against a tool having surface irregularities such as a sponge or a towel when a wide surface area such as a body is washed. Such usages are widespread. On the other hand, as for solid hair detergent compositions, it is difficult to take an appropriate amount of agent for a large surface area to be washed due to its properties. For example, when the solid agent is rolled on a hand to take the agent, it takes time to collect the required amount of the agent. A method of directly rubbing the solid agent against hair is conceivable. However, it is difficult to see the adhered agent and to control the amount of the agent to be taken. If the rubbing force is too strong, the detergent may remain on the hair in a solid state even after rinsing. For the conventional solid hair detergent compositions, no consideration has been given regarding the handleability of the agent (the property that a sufficient amount of the agent necessary for hair cleansing can be efficiently taken out of the solid detergent by hand). The inventor of the present invention has studied compositions for improving the handleability of the agent from solid hair detergent compositions. When the handleability