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Coated colored solid particles comprising at least one direct dye and/or one oxidation dye precursor

A technology of solid particles and oxidative dyes, applied in the field of dyeing keratin fibers, can solve problems such as different final effects, and achieve the effects of good dissolution and good stability

Pending Publication Date: 2022-05-27
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, each of these dye compositions enables to obtain only one color shade, and the user can only choose from a limited number of shades pre-selected by the manufacturer, which do not always match their expectations
[0008] Furthermore, the predetermined dye composition does not always make it possible to produce exactly the corresponding preselected shade: depending on the natural shade (more or less light or dark) and the condition of the user's hair (more or less damaged or sensitive) , the end result in terms of coloring can vary significantly from user to user
[0009] Therefore, current oxidation dye compositions do not make it possible to quickly obtain (for example, during a user's appointment at a hair salon) customized coloration according to the pre-existing shade of the user's keratin fibers or according to his desire.

Method used

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  • Coated colored solid particles comprising at least one direct dye and/or one oxidation dye precursor
  • Coated colored solid particles comprising at least one direct dye and/or one oxidation dye precursor
  • Coated colored solid particles comprising at least one direct dye and/or one oxidation dye precursor

Examples

Experimental program
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preparation example Construction

[0178] According to another specific preparation method, the solid particles according to the present invention can be prepared via wet granulation according to the following steps:

[0179] - pre-mixed binders (eg lactose, microcrystalline cellulose, polyvinyl alcohol (PVA)) and direct dyes and / or oxidation dye precursors; and then

[0180] - spraying onto the premix a disintegrant (eg cross-linked polyvinylpyrrolidone) dissolved in one or more solvents as described in the paragraph above for the coating to produce the desired pellets those described in the coating composition, especially water; and then

[0181] - drying the pellets; and then

[0182] - grinding the other components of the solid particles; and then

[0183] - screening powders and granules obtained by grinding; and then

[0184] - mix the powder obtained by screening; and then

[0185] - compressing the obtained mixture directly into solid particles; and optionally

[0186] - Coating the obtained solid ...

example

[0382] The following solid particles and compositions according to the invention were prepared using the following ingredients, the content of which is indicated in the table below in terms of mass percent of active substance relative to the total weight of the solid particles or composition.

[0383] example of particles

[0384] Solid particles without an overcoat

[0385] [Table 1]

[0386] Element quantity microcrystalline cellulose 56 lactose 15 PVP 4.75 Magnesium stearate 2 silica 1 Toluene-2,5-diamine sulfate 20 Sulfite 1 water 0.25

[0387] Examples of upper coating layers

[0388] [Table 2]

[0389] Element quantity Hydroxypropyl methylcellulose (HPMC) 45 to 55 Hydroxypropyl Cellulose (HPC) 5 to 20 Capric / Caprylic Triglycerides 1 to 10 talc Appropriate amount to 100 pigment 0 to 40

[0390] Example of Solid Particles with Overcoat

[0391] [T...

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Abstract

The present application relates to a coloured solid particle for dyeing keratin fibres, in particular human keratin fibres such as the hair, comprising a core comprising one or more direct dyes and / or one or more oxidation dye precursors and an upper coating layer covering the core and comprising one or more cellulose ethers. The present application also relates to a process for preparing a dye composition comprising one or more coloured solid particles, to a process for oxidative dyeing of keratin fibres comprising applying the obtained composition to the fibres, and to the use of such a composition for dyeing keratin fibres.

Description

technical field [0001] The present application relates to a colored solid particle for dyeing keratin fibers, in particular human keratin fibers such as hair, comprising a core containing one or more direct dyes and / or one or more oxidative dye precursors and An overcoat layer covering the core and containing one or more cellulose ethers. [0002] The application also relates to a method for preparing a dye composition comprising one or more colored solid particles, a method for dyeing keratin fibers, said method comprising applying the obtained composition to said fibers , and the use of such a composition for dyeing keratin fibers. Background technique [0003] It is known to dye keratin fibres and especially human hair with dye compositions containing oxidation dye precursors such as oxidation bases, especially o-phenylenediamine or terephthalene Amines, o- or p-aminophenols and heterocyclic compounds. These oxidative bases are colourless or weakly coloured compounds w...

Claims

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Application Information

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IPC IPC(8): A61K8/02A61K8/34A61K8/41A61K8/73A61Q5/10
CPCA61K8/0245A61K8/731A61K8/347A61K8/411A61Q5/10A61K2800/624A61K2800/4324A61K2800/652A61K8/0241A61K2800/31A61K8/415A61K8/44A61K8/463A61K8/8152A61K8/8176A61K2800/432
Inventor 弗雷德里克·居林
Owner LOREAL SA
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