Search

EP-4734916-A1 - COMPOSITION FOR CONDITIONING THE HAIR

EP4734916A1EP 4734916 A1EP4734916 A1EP 4734916A1EP-4734916-A1

Abstract

It relates to a composition for conditioning the hair comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprises: a) an inner core comprising at least one saturated oil; and b) a hydrogel outer shell comprising water and at least one polysaccharide thickener, wherein the liquid medium is a hydroalcoholic medium.

Inventors

  • YAO, Mingming
  • CHANG, Shaokun
  • GU, Xing
  • YUAN, SHUHONG

Assignees

  • L'OREAL

Dates

Publication Date
20260506
Application Date
20230630

Claims (16)

  1. A composition for conditioning the hair comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise: a) an inner core comprising at least one saturated oil; and b) a hydrogel outer shell comprising water and at least one polysaccharide thickener, wherein the liquid medium is a hydroalcoholic medium.
  2. Composition according to claim 1, wherein the saturated oil is a triglyceride oil with the following formula (I) CH 2 (OOCR 1 ) CH (OOCR 2 ) CH 2 (OOCR 3 ) (I) wherein R 1 , R 2 and R 3 are independently chosen from C 6 -C 30 alkyl, preferably, R 1 , R 2 and R 3 are independently chosen from C 6 -C 20 alkyl, more preferably, R 1 , R 2 and R 3 are independently chosen from C 6 -C 12 alkyl, said alkyl is linear or branched, preferably the saturated oil is a mixture of Capric and Caprylic triglyceride, and more preferably the ratio of Capric to Caprylic in the saturated triglyceride is in the range of 60: 40 to 80: 20.
  3. Composition according to claim 1 or 2, wherein the saturated oil is present in an amount ranging from 3 wt. %to 40 wt. %, more preferably from 5 wt. %to 35 wt. %, most preferably from 8 wt. %to 25 wt. %, relative to the total weight of the composition.
  4. Composition according to any of claims 1-3, wherein the inner core further comprises at least one unsaturated oil, the amount thereof is 5 wt. %or less, preferably from 0.1 wt. %to 5 wt. %, relative to the total weight of the composition.
  5. Composition according to claim 4, wherein the unsaturated oil is selected from the group consisting of Limnanthes Alba (Meadowfoam) Seed Oil, Argania spinosa Kernel Oil, Apricot Oil, Zea Mays Germ Oil, Passiflora Incarnata Seed Oil, Gossypium Herbaceum (Cotton) Seed Oil, Glycine Soja (Soybean) Oil, and a combination thereof, and is preferably Limnanthes Alba (Meadowfoam) Seed Oil.
  6. Composition according to any of claims 1-5, wherein the polysaccharide thickener is chosen from agar, non-ionic guar gums, cationic hydroxyalkyl guar gums, (poly) hydroxy (C1-C4) alkylcelluloses, (poly) hydroxy (C1-C4) alkyl (C1-C4) alkylcelluloses, and combinations thereof.
  7. Composition according to claim 6, wherein the polysaccharide thickener is chosen from a combination of agar and cationic hydroxyalkyl guar gums such as hydroxypropyl guar hydroxypropyltrimonium chloride.
  8. Composition according to any of claims 1-7, wherein the polysaccharide thickener is present in an amount ranging from 0.05 wt. %to 2 wt. %, preferably from 0.1 wt. %to 1.5 wt. %, more preferably from 0.2 wt. %to 1.0 wt. %, relative to the total weight of the composition.
  9. Composition according to any of claims 1-8, wherein the hydroalcoholic medium comprises a polyol having from 2 to 10 carbon atoms, more preferably from 3 to 8 carbon atoms, even more preferably, the polyol is selected from hexylene glycol, butylene glycol, propylene glycol, dipropylene glycol, glycerin, and combinations thereof.
  10. Composition according to any of claims 1-9, wherein the liquid medium comprises a hydrophilic thickener, which is preferably selected from (C1-C4) alkylcelluloses; (poly) hydroxy (C1-C4) alkylcelluloses, such as hydroxymethylcelluloses, hydroxyethylcelluloses and hydroxypropylcelluloses; (poly) hydroxy (Cl-C4) alkyl (C1-C4) alkylcelluloses, such as hydroxypropylmethylcelluloses, hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses and hydroxybutylmethylcelluloses, and a combination thereof.
  11. Composition according to claim 10, wherein the hydrophilic thickener is present in an amount ranging from 0.05 wt. %to 5 wt. %, preferably from 0.1 wt. %to 3 wt. %, more preferably from 0.1 wt. %to 2 wt. %, relative to the total weight of the composition.
  12. Composition according to claim 1, comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise, relative to the total weight of the composition: a) an inner core comprising from 8 wt. %to 25 wt. %of caprylyl/capryl triglyceride and optionally from 0.1 wt. %to 0.5 wt. %of Limnanthes Alba (Meadow foam) Seed Oil; and b) a hydrogel outer shell comprising from 0.1 wt. %to 1 wt. %of agar and from 0.05 wt. %to 1 wt. %of hydroxypropyl guar hydroxypropyltrimonium chloride, and water; wherein the liquid medium comprises from 2 wt. %to 40 wt. %of polyol, especially butylene glycol, from 0.1 wt. %to 2 wt. %of (poly) hydroxy (C1-C4) alkyl (C1-C4) alkylcelluloses, especially, hydroxypropyl methylcellulose and water.
  13. Composition according to any of claims 1-12, wherein the hydrogel capsules have a particle size of 0.3-15 mm, preferably 1-10 mm, more preferably 2-6 mm, and/or the outer shell has a thickness of 0.01-2μm, preferably 0.01-1.5μm.
  14. Composition according to any of claims 1-13, wherein the weight ratio of the hydrogel capsules to the liquid medium is from 97: 3 to 80: 20, preferably from 95: 5 to 90: 10.
  15. A process for conditioning the hair comprising applying the composition according to any of claims 1-14 onto the hair.
  16. The process according to claim 15 comprising the step of mixing the composition according to any of claims 1-14 with a hair composition comprising a cationic conditioner and then applying the mixture obtained onto the hair.

Description

COMPOSITION FOR CONDITIONING THE HAIR TECHNICAL FIELD The present invention belongs to the field of cosmetic product. In particular, the present invention relates to a composition for conditioning the hair. The present invention also relates to a cosmetic process for conditioning the hair. BACKGROUND ART The appearance and/or condition of keratin fibers are often affected by both extrinsic and intrinsic factors such as aging. Keratin fibers, especially hair, are constantly exposed to harsh extrinsic conditions, such as sun, chemical damage, e.g., from detergents, bleaching, relaxing, dyeing, and permanent waving, heat, e.g., from hair dryers or curlers, and mechanical stress or wear, e.g., from brushing or grooming activities. In addition, any type of hair can diminish in quality and/or quantity over time by age and/or due to factors such as natural greasiness, sweat, skin cells shed from the scalp, pollution, dirt, and extreme humidity conditions. The above-described factors can result in thinning hair and/or harm the visual appearance and the feel of the hair, and lead to decreased volume. For example, hair can dry out and lose its shine or color or become frizzy and less manageable under low and high humidity conditions. Under low humidity conditions, hair can dry out and dried-out hair tends to be less shiny and more brittle. Conversely, under high humidity conditions, hair tends to absorb water, causing hair to lose its shape and become unmanageable and unattractive. Furthermore, hair can lose its desirable attributes due to physical stress on the hair such as brushing and application of heat. As such, these factors generally result in damage to the keratin fibers, either by affecting protective materials on the surface of the hair (the cuticle) , or by altering the hair fiber internally (the cortex) . Thus, there is also a need to formulate a cosmetic product for conditioning the hair, which is stable over time while providing a good hair smoothness. SUMMARY OF THE INVENTION The present invention aims at providing a cosmetic product for conditioning the hair, in which a saturated oil is comprised to provide better stability and smoothness than product comprising only an unsaturated oil, and thus the cosmetic product can avoid unpleasant smell from degradation. Thus, according to a first aspect, the present invention relates to a composition for conditioning the hair comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprises: a) an inner core comprising at least one saturated oil; and b) a hydrogel outer shell comprising water and at least one polysaccharide thickener, wherein the liquid medium is a hydroalcoholic medium. The composition according to the present invention comprises hydrogel capsules comprising an inner core oil phase and a hydrogel outer shell phase, and a liquid medium phase, thus it is a three-phase system, which is stable under room temperature, 4℃, and 45℃ for at least 2 months. The composition according to the present invention can provide a good hair smoothness. In addition, the compositions according to the present invention can be applied easily and uniformly on the hair, and be rinsed off easily. According to a second aspect, the present invention relates to a process for conditioning the hair comprising applying the composition as described above onto the hair. Other characteristics and advantages of the invention will emerge more clearly on reading the description and the examples that follow. DETAILD DESCRIPTION OF THE INVENTION As used herein, unless otherwise indicated, the limits of a range of values are included within this range, in particular in the expressions "between. . . and... " and "from. . . to ... ” . As used herein, the term “comprising” is to be interpreted as encompassing all specifically mentioned features as well as optional, additional, unspecified ones. As used herein, the use of the term “comprising” also discloses the embodiment wherein no features other than the specifically mentioned features are present (i.e. “consisting of” ) . Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the field the present invention belongs to. When the definition of a term in the present description conflicts with the meaning as commonly understood by those skilled in the field the present invention belongs to, the definition described herein shall apply. Unless otherwise specified, all numerical values expressing amount of ingredients and the like used in the description and claims are to be understood as being modified by the term “about” . Accordingly, unless indicated to the contrary, the numerical values and parameters described herein are approximate values which are capable of being changed according to the desired performance obtained as required. The term “about” denoting a certain value is intended to denote a range within ± 5%ofthe value, e.g.