Process for semi-permanent straightening of curly, frizzy or wavy hair
US-9844500-B2 · Dec 19, 2017 · US
Process for one-step colouring and straightening hair
US10874185B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10874185-B2 |
| Application number | US-201414780186-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 9, 2014 |
| Priority date | May 10, 2013 |
| Publication date | Dec 29, 2020 |
| Grant date | Dec 29, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present invention provides a method which achieves a simultaneous coulouring and straightening of the hair in a single step, utilizing a hair treatment composition comprising at least one carboxylic acid of formula (I) defined below and at least one direct dye: R—CO—COOH Formula (I) In another aspect, the invention is directed to the hair treatment composition and the use thereof for straightening and colouring the hair.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for simultaneously straightening and coloring hair, comprising the following steps: (a) application of a single hair treatment composition for straightening and coloring hair comprising a direct dye selected from the group consisting of an anionic direct dye, a cationic direct dye, and a nitro direct dye wherein the total amount of the direct dye is 0.01 to 7.5% by weight and glyoxylic acid at a total concentration in the range of 2.5 to 20% by weight based on the weight of the total single hair treatment composition onto the hair: (b) leaving the single hair treatment composition on the hair for 10 to 60 minutes; (b′) optionally rinsing off the hair; (c) drying the hair; and (d) treating the hair with an iron having a surface temperature of 180 ±50° C.; (e) optionally rinsing off and/or shampooing the hair and drying, wherein the hair treatment composition has a pH of 1 to 3, wherein the single hair treatment composition is free of any sulfur-based reducing agents. 2. The process according to claim 1 , wherein the single hair treatment composition further comprises a conditioning component selected from the group consisting of a silicone oil and a cationic polymer. 3. The process according to claim 1 , wherein the temperature of the iron is in the range of 170 to 200° C.
Assignees
Inventors
Classifications
- A61K8/365Primary
Hydroxycarboxylic acids; Ketocarboxylic acids · CPC title
in preparations for permanently dyeing the hair · CPC title
containing sulfonic acid derivatives; Salts · CPC title
containing nitro groups · CPC title
Imidazoles or their condensed derivatives, e.g. benzimidazoles · CPC title
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- What does patent US10874185B2 cover?
- The present invention provides a method which achieves a simultaneous coulouring and straightening of the hair in a single step, utilizing a hair treatment composition comprising at least one carboxylic acid of formula (I) defined below and at least one direct dye: R—CO—COOH Formula (I) In another aspect, the invention is directed to the hair treatment composition and the use thereof …
- Who is the assignee on this patent?
- Kao Corp
- What technology area does this patent fall under?
- Primary CPC classification A61K8/365. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Dec 29 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).