Process for semi-permanent straightening of curly, frizzy or wavy hair

Patent metadata

Field	Value
Publication number	US-9844500-B2
Application number	US-201113580672-A
Country	US
Kind code	B2
Filing date	Feb 23, 2011
Priority date	Feb 24, 2010
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

The process of the invention provides for a preventive hair treatment with buffering agent, in particular glyoxylic acid in combination with mechanical straightening with hair straightening iron at temperature of approximately 200° C.+/−50° C.

First claim

The invention claimed is:

1. A process for semi-permanent hair straightening, comprising
a) applying a solution comprising glyoxylic acid at a pH of 1.5-2.1, wherein the hair is prewashed prior to said applying;
b) keeping the solution in contact with hair for 15 to 120 minutes, wherein said keeping has an average duration of 60 minutes;
c) drying the hair, and
d) straightening the hair with a hair straightening iron at temperature of approximately 200+/−50° C.
wherein the hair is human hair and said glyoxylic acid is dissolved in aqueous solution in ponderal ratio between 5% and 10% in weight.

2. The process as claimed in claim 1 , further comprising prewashing the hair with a basic shampoo having a pH of from 7.5 to 9.5 prior to said applying; and rinsing said hair after said straightening.

3. The process as claimed in claim 1 , further comprising washing the hair with an acidic shampoo having a pH of approximately from 4.5 to 5.5 after said straightening.

4. The process as claimed in claim 1 , wherein said glyoxylic acid is mixed with at least one member selected from the group consisting of potassium iodide, dihydroxyacetone, ozonized jojoba oil, and 2,4-hexadienal.

5. The process as claimed in claim 1 , wherein said glyoxylic acid is mixed with at least one additive selected from the group consisting of potassium iodide, dihydroxyacetone, ozonized jojoba oil, and 2,4-hexadienal, wherein said at least one additive is present in an amount of 5% to 25% in weight of the solution, and the solution comprises, in an amount to form 100% in weight of the solution, an inert cosmetic substance operable for the straightening of curly, frizzy, or wavy hair.

6. The process as claimed in claim 1 , further comprising washing the hair with a shampoo after said straightening.

Assignees

• Mannozzi Alderano
• Kao Corp

Inventors

• Mannozzi Alderano

Classifications

• A61K8/365 Primary

  Hydroxycarboxylic acids; Ketocarboxylic acids · CPC title

• A45D2/001

  Hair straightening appliances · CPC title

• A61Q5/06

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

• A61K2800/805

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

• A61Q5/04

  Preparations for permanent waving or straightening the hair · CPC title