CN-115867358-B - Thickening alkalizing component for oxidative hair lightening agents

Abstract

The present invention relates to a water-based cosmetic composition thickened with xanthan gum and sodium carboxymethylcellulose, which has a strongly alkaline pH value to be used as an alkalizing component in a two-part or three-part oxidative hair lightening agent.

Inventors

• O. Nemitz
• A. WRIGHT

Assignees

• 汉高股份有限及两合公司

Dates

Publication Date

20260508

Application Date

20210607

Priority Date

20200617

Claims (20)

1. 1. An alkalizing component for an oxidative hair lightening agent comprising: -81-92% by weight of water, -1-2 Wt% of xanthan gum, 0.5 To 1.5% by weight of sodium carboxymethylcellulose, 3-9 Wt.% in total of at least one alkalizing agent selected from the group consisting of ammonium hydroxide and alkanolamines and mixtures thereof, 0.5 To 7.0% by weight in total of at least one oil selected from the group consisting of branched saturated fatty alcohols having 6 to 30 carbon atoms, and esters of saturated linear or branched fatty alcohols having 2 to 30 carbon atoms with saturated linear or branched fatty acids having 2 to 30 carbon atoms which can be hydroxylated, and mixtures thereof, 0.4 To 2% by weight in total of at least one surfactant selected from anionic surfactants substituted by at least one C8-C14 alkyl group, zwitterionic surfactants substituted by at least one C8-C14 alkyl group, amphoteric surfactants substituted by at least one C8-C14 alkyl group and alkyl oligoglycoside surfactants substituted by at least one C8-C14 alkyl group, From 0 to 0.1% by weight of a peroxide, and From 0.1 to 2% by weight, based in each case on the weight of the free glucoheptonic acid, of glucoheptonic acid and/or at least one physiologically tolerated salt and/or lactone thereof, Wherein all numbers expressed in weight% are based on the weight of the alkalizing component, Wherein the alkalizing component has a pH of 8.0 to 12.0, measured at 20 o C, -Wherein no percarbonate is present, -Wherein no acrylate-containing monomer, methacrylate-containing monomer or vinyl-containing monomer polymer or copolymer is present and no polyurethane is present, and -Wherein no fat component having a melting point of 28 o C or higher is included.
2. 2. The alkalizing component according to claim 1, characterized in that it has a viscosity of 2,000 to 110,000 mPa-s, measured at 20 o C.
3. 3. Alkalizing composition according to claim 1 or 2, characterized in that polysaccharides other than xanthan gum and sodium carboxymethyl cellulose are absent.
4. 4. Alkalizing composition according to claim 1 or 2, characterized in that the alkanolamine used as alkalizing agent is selected from primary amines having a C 2 -C 6 alkyl backbone carrying at least one hydroxyl group.
5. 5. Alkalizing composition according to claim 1 or 2, characterized in that the total amount of said at least one oil is 2.0-5.5% by weight.
6. 6. Alkalizing composition according to claim 1 or 2, characterized in that the total amount of said at least one oil is 3.5-5.0% by weight.
7. 7. Alkalizing composition according to claim 1 or 2, characterized in that the total amount of glucoheptonic acid and/or at least one physiologically tolerated salt and/or lactone thereof is 0.6 to 1.5% by weight.
8. 8. Alkalizing composition according to claim 1 or 2, characterized in that the total amount of glucoheptonic acid and/or at least one physiologically tolerated salt and/or lactone thereof is 0.8 to 1.1% by weight.
9. 9. The alkalizing component according to claim 1 or 2, characterized in that it has a pH of 9.6 to 11.5.
10. 10. The alkalizing component according to claim 1 or 2, characterized in that it has a pH of 10.0 to 11.0.
11. 11. The alkalizing component according to claim 2, characterized in that it has a viscosity of 40,000 to 100,000 mPa-s.
12. 12. The alkalizing component according to claim 2, characterized in that it has a viscosity of 70,000 to 90,000 mPa-s.
13. 13. The alkalizing component according to claim 4, characterized in that the alkanolamine used as alkalizing agent is selected from the group consisting of 2-aminoethyl-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1-aminopropan-2-ol, 1-aminobutan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1, 2-diol and 2-amino-2-methylpropan-1, 3-diol and mixtures thereof.
14. 14. The alkalizing component according to claim 4, characterized in that the alkanolamine used as alkalizing agent is selected from the group consisting of 2-aminoethan-1-ol, 2-amino-2-methylpropan-1-ol and 2-amino-2-methylpropan-1, 3-diol and mixtures thereof.
15. 15. The alkalizing component according to claim 4, characterized in that the alkanolamine used as alkalizing agent is selected from 2-aminoethan-1-ol.
16. 16. Alkalizing composition according to claim 1 or 2, characterized in that at least one aminated silicone is also present.
17. 17. An alkalizing component according to claim 16, characterized in that the total amount of aminated silicone is 0.1 to 2% by weight, based in each case on the weight of the alkalizing component.
18. 18. An alkalizing component according to claim 16, characterized in that the total amount of aminated silicone is 0.7 to 1.5% by weight, based in each case on the weight of the alkalizing component.
19. 19. An alkalizing component according to claim 16, characterized in that the total amount of aminated silicone is 0.9 to 1.1% by weight, based in each case on the weight of the alkalizing component.
20. 20. Packaging unit comprising-packaging individually-each other -At least one container (C1) comprising an alkalizing component according to any one of claims 1 to 19, and -At least one container (C2) comprising an oxidant formulation (M2), the oxidant formulation (M2) comprising 40-96 wt.% of water, further comprising a total amount of 0.5-23 wt.% of hydrogen peroxide, and having a pH value of 2.0-6.5, the pH value being measured in each case at 20 o C, wherein the wt.% data of (M2) is based in each case on the weight of the oxidant formulation (M2), and the oxidant formulation (M2) does not comprise a polymer or copolymer of acrylate-, methacrylate-or vinyl-containing monomers and does not comprise polyurethane.

Description

Thickening alkalizing component for oxidative hair lightening agents The present invention relates to a water-based cosmetic composition thickened with xanthan gum and sodium carboxymethylcellulose, which has a strongly alkaline pH value to be used as an alkalizing component in a two-part or three-part oxidative hair lightening agent. Furthermore, the present invention relates to a kit comprising the alkalizing component and a hair lightening method using the alkalizing component. In addition to coloring, lightening or bleaching of the hair color itself is a desire of many consumers, as blond hair color is considered attractive and desirable in terms of fashion. If the hair is to be reduced or even bleached, the natural pigments responsible for the natural color of the hair, in particular the melanin (melanins) eumelanin (eumeolanin) and eumelanin (phaeomelan) of the body itself, are oxidatively decomposed using an oxidizing agent, for example in particular hydrogen peroxide, and the hair is therefore decolorized and reduced or even bleached. In order to develop the optimal desalination performance of the oxidizing agent, the oxidizing desalination agent requires an alkaline pH, especially at a pH of 10.0 to 11.0, for reaction acceleration. However, hydrogen peroxide, the most commonly used oxidizing agents for cosmetic purposes, can only be stored at low pH values, i.e. at pH 2.0 to 6.5. Thus, commercial bleaching agents are typically packaged as a kit consisting of an aqueous hydrogen peroxide solution having a more acidic pH, preferably pH 2.0 to 6.5, and an alkalizing component. The two components are mixed together only shortly before application to the hair. The composition and mixing ratio of the two components are matched to one another in such a way that the resulting application mixture has an alkaline pH value, in particular a pH of 9 to 10. Furthermore, persulfate-containing compositions, typically anhydrous, may be added to the alkaline application mixture containing hydrogen peroxide shortly before application to the hair to enhance the lightening effect of the bleach. Such commercial bleaching agents are available as kits consisting of an aqueous hydrogen peroxide solution having a more acidic pH, preferably a pH of 2.0 to 6.5, an alkalizing component, typically creamy, and an anhydrous composition comprising persulfate. Typically, the kit further comprises one or more hair conditioning agents for post-nourishing hair after the bleaching process is completed. The application time of the attractive bleaching effect is typically from 5 to 60 minutes. The individual components of the ready-to-use bleaching agent must therefore be formulated in such a way that they can be mixed thoroughly with one another and then distributed on the hair to be bleached on the one hand, and that they are sufficiently viscous to remain on the hair to be bleached without dripping during application on the other hand. The viscosity may be adjusted by a polymeric thickener and the thickener may be included in the alkalizing component and the oxidizer formulation, and optionally in the persulfate-containing anhydrous composition. The alkaline pH of the alkalizing component is adjusted with an alkalizing agent, mainly ammonium hydroxide or ammonia or alkanolamine, and mixtures of these alkalizing agents. Ammonium hydroxide and alkanolamines, especially monoethanolamine, are particularly good for swelling the stratum corneum, the outer stratum corneum of keratin fibers, so that the oxidizing agent can penetrate well into the keratin fibers and lighten their color. Basic amino acids and inorganic bases are not well suited as the sole alkalizing agent, however, these components may be used as additional alkalizing agents. To produce a ready-to-use bleach, the alkalizing component is typically mixed with an aqueous hydrogen peroxide solution to form a homogeneous cream or gel, and then applied directly to the hair to lighten its color. Optionally, a persulfate-containing anhydrous composition may be added to the mixture to further enhance the desalination and bleaching properties of the agent. This bleach remains on the hair for a period of 5 to 60 minutes until the oxidative degradation of the natural melanin hair pigments, i.e., eumelanin and pheomelanin, is completed to the desired extent. The bleach is then rinsed from the hair. The extent of melanin degradation and thus the hair lightening achieved depends on various properties of the hair, in particular the original amounts of melanin and melanin, and the structure of the hair fibers. A good bleaching agent is capable of decomposing melanin as thoroughly as possible without producing undesirable chromaticity. Furthermore, it is important to achieve a color lightening effect that is as uniform as possible along the keratin fibers, independent of the extent of damage to the keratin fibers along their length. This means that the same color tone as on a more damaged hair