Process for semi-permanent hair straightening and aftercare of the hair

Patent metadata

Field	Value
Publication number	US-10383801-B2
Application number	US-201314917905-A
Country	US
Kind code	B2
Filing date	Sep 16, 2013
Priority date	Sep 16, 2013
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

The present invention relates to a process for semi-permanent hair straightening and aftercare treatment and to a kit of compositions for use in this process. In the process of the present invention, the hair is firstly subjected to a straightening treatment using a straightening composition comprising at least one carboxylic acid of the formula (I): R—CO—COOH defined below and/or a hydrate thereof and/or a salt thereof. Then, a specific cleansing composition and/or a specific conditioning composition comprising at least one carboxylic acid of the formula (I): R—CO—COOH defined below and/or a hydrate thereof and/or a salt thereof are used as aftercare products in order to improve durability of the straightening effect.

First claim

The invention claimed is:

1. Process for semi-permanent hair straightening and aftercare treatment, which comprises the following steps, performed in this order:
(a) application of a straightening composition onto the hair,
(b) leaving the composition on the hair for 10 to 60 minutes;
(c) optionally rinsing off the hair;
(d) drying the hair,
(e) treating the hair with an iron having a surface temperature of 130 to 250° C.,
(f) optionally rinsing off and/or shampooing the hair and drying;
(g) treating the hair with a cleansing composition,
wherein
the straightening composition has a pH of 1 to 3 and is an emulsion comprising: glyoxylic acid and/or a hydrate thereof and/or a salt thereof, at a total concentration in the range of 2.5 to 25% by weight, based on the weight of the total composition
the cleansing composition has a pH of 1.5 to 4 and comprises an anionic surfactant at a concentration of 1% to 30% by weight based on the weight of the cleansing composition and glyoxylic acid and/or a hydrate thereof and/or a salt thereof at a concentration in the range of 0.1% to 5% by weight based on the weight of the cleansing composition;

wherein the combination with the application of a reducing composition or an alkaline relaxer is excluded.

2. The process according to claim 1 , wherein the anionic surfactant is selected from a group consisting of alkyl sulphate and ether sulphate.

3. The process according to claim 1 , wherein step (g) is carried out repeatedly at least once a week.

4. The process according to claim 1 , wherein the straightening composition is applied to the hair in an application ratio of hair to composition of 0.5:2 to 2:0.5.

5. The process according to claim 1 , wherein the temperature of the iron is in the range of 150 to 230° C.

Assignees

• Kao Corp

Inventors

• Rose Burkhard
• Grit Mustafa

Classifications

• A61K8/365 Primary

  Hydroxycarboxylic acids; Ketocarboxylic acids · CPC title

• A61K2800/884

  Sequential application · CPC title

• A61K2800/805

  Corresponding aspects not provided for by any of codes A61K2800/81 - A61K2800/95 · CPC title

• A61Q5/06

  Preparations for styling the hair, e.g. by temporary shaping or colouring · CPC title

• A61K8/19

  containing inorganic ingredients · CPC title