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Oxidation dyeing process

A technology of oxidative dyeing and coupler, applied in the direction of cosmetics, pharmaceutical formulations, cosmetic preparations, etc., can solve the problem of unsatisfactory color and achieve the effect of improving dyeing properties and strength

Pending Publication Date: 2020-12-18
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the colors obtained are not always satisfactory, especially in terms of color variety, coverage on gray hair, chroma, tinting strength and / or selectivity

Method used

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  • Oxidation dyeing process
  • Oxidation dyeing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0327] 1 / composition test

[0328] Described dyeing method is made up of following 3 steps:

[0329] Step 1: A composition of the composition of the invention (A1 ) or of the prior art composition (A2) is applied with a brush to natural 90%-gray hair. The liquor ratio composition / hair was 10 / 1 (w / w). The dwell time was 20 minutes at ambient temperature.

[0330] Step 2: Rinse and dry with an absorbent towel.

[0331] Step 3: Applying the oxidizing composition (B). The liquor ratio of mixture / hair was 10 / 1 (w / w). The dwell time is 10 minutes.

[0332] After this leave time, the locks are washed with InoaPost shampoo, rinsed and then dried.

[0333] Composition (A1) for use in the method of the invention and (A2) for use in the comparative method were prepared as follows:

[0334]

[0335]

[0336] * Quantity: Percentage of grams against 100 g of composition

[0337] NB: The compositions A1 and A2 do not contain an oxidation base.

[0338] Oxidizing composition...

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Abstract

The subject of the present invention is a process for the oxidation dyeing of keratin fibres, implementing: a) a step of treating fibres by application to said fibres of a cosmetic composition (A) comprising: i) at least one fatty substance in an amount of greater than 10% by weight relative to the total weight of the composition (A); ii) at least one metal catalyst; iii)at least one coupler; iv)optionally at least one oxidation base; b) optionally a washing, rinsing, drying and / or rubbing-dry step; c) a step of treatment by application to said fibres of an oxidizing cosmetic composition (B)comprising at least one chemical oxidizing agent; and it being understood that steps a), b) and c) can be carried out successively a), then b), then c), or else a) then c), followed by b). The dyeingprocess makes it possible to significantly improve the dyeing properties of the colouration. The use of a composition which is rich in fatty substances and contains at least one catalyst, as a pretreatment, before oxidation dyeing, allows a clear improvement in the dyeing properties.

Description

[0001] The application number is 201480035313.9 (International Application No. PCT / EP2014 / 062930), the application date is June 19, 2014, and the title of the invention is "Oxidative dyeing using a composition rich in fat substances comprising a metal catalyst and a coupler" Method" is a divisional application of the Chinese patent application. technical field [0002] The present invention relates to a process for oxidatively dyeing keratin fibers using a fat-rich substance and comprising one or more metal catalysts and one or more oxidative couplers, and optionally one Or more combinations of oxidation bases. Background technique [0003] Many people have long sought to change the color of their hair, and especially to cover up their gray hair. [0004] It is known practice to obtain "permanent" or oxidative coloration with dyeing compositions containing oxidation dye precursors, commonly known as oxidation bases, such as o-phenylenediamines or p-phenylenediamines , o-am...

Claims

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Application Information

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IPC IPC(8): A61K8/19A61K8/22A61K8/31A61K8/34A61K8/365A61K8/41A61K8/58A61Q5/10B65D81/32
CPCA61K8/19A61K8/22A61K8/31A61K8/342A61K8/365A61Q5/10A61K2800/884A61K8/411A61K8/58A61K2800/4324B65D81/32
Inventor L.埃尔库埃M.米尼翁H.萨曼A.拉格朗日
Owner LOREAL SA
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