Back to results
US 11,110,041 B2Granted
Process for permanent shaping hair
AssigneeKao Germany GmbH
InventorsBernd Nöcker, Steven Breakspear, Peter Bauer, Jonathan Wood
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for improved and milder permanent shaping of hair, especially human hair. It has been found that when commonly used permanent shaping compositions are mixed with another composition comprising predominantly carboxylic acids, the permanent shaping effect of the composition is improved, homogeneous permanent shaping of hair fibers is achieved and natural cosmetic properties of hair are maintained.
Claims16
A process for permanent shaping hair, the process comprising:
- a—optionally washing hair with a cleansing composition and towel drying the hair;
- b—mixing a composition A and a composition B immediately before application onto the hair at a weight ratio of composition A to composition B in the range of 10:0.1 to 10:1 to obtain a ready-to-use composition having an alkaline pH in the range from 7.3 to 11;
- c—applying the obtained ready-to-use composition onto the hair, and leaving the applied ready-to-use composition on the hair for 1 to 45 min;
- d—optionally rinsing the applied ready-to-use composition off the hair with water;
- e—optionally applying, onto the hair, an intermediate treatment composition comprising one or more inorganic salts and having a pH from 2 to 7;
- f—applying, onto the hair, a fixing composition comprising one or more oxidizing agents and having a pH in the range of 1.5 to 5 and leaving the applied fixing composition on the hair for 1 to 15 min;
- g—optionally rinsing the applied fixing composition off the hair;
- and
- h—optionally drying the hair,
- wherein
- the composition A is an aqueous composition comprising one or more reducing agents, one or more alkalizing agents, and has a pH in the range of 7.5 to 12,
- the composition B comprises;
- i) one or more carboxylic acids having three or more carboxyl groups and/or their salts;
- and
- ii) one or more additional organic acids and/or their salts having one or two carboxyl groups,
- the composition B comprises the acids of i) and ii) and/or their salts at a total concentration from 10% to 100% by weight, based on a total of the composition B,
- the obtained ready-to-use composition comprises the acids of i) and ii) and/or their salts at a total concentration in the range of 1% to 10% by weight, based on a total of the obtained ready-to-use composition,
- the composition B comprises the acids of (i) and (ii) at a weight ratio (i)/(ii) ranging from 10:1 to 1:250,
- the hair is put under tension before, during, or after application of the obtained ready-to-use composition, and
- the tension is released from the hair before or during application of the fixing composition or prior to rinsing off the applied fixing composition off the hair.
17 more elements
A process for permanent shaping hair, the process comprising:
- a—applying a ready-to-use composition onto the hair, wherein the ready-to-use composition is obtained by mixing a composition A and a composition B immediately before application onto the hair at a weight ratio of composition A to composition B in the range of 10:0.1 to 10:1, and leaving the applied ready-to-use composition on the hair for 1 to 45 min;
- b—applying, onto the hair, a fixing composition comprising one or more oxidizing agents and having a pH in the range of 1.5 to 5 and leaving the applied fixing composition on the hair for 1 to 15 min;
- wherein
- the composition A is an aqueous composition comprising one or more reducing agents, one or more alkalizing agents, and has a pH in the range of 7.5 to 12,
- the composition B comprises;
- i) one or more carboxylic acids having three or more carboxyl groups and/or their salts selected from citric acid, ethylene diamine tetra acetic acid (EDTA), pyromellitic acid, glutamate diacetate, and their salts;
- and
- ii) one or more additional organic acids and/or their salts having one or two carboxyl groups selected from acetic acid, malic acid, lactic acid, glycolic acid, tartaric acid, formic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and their salts,
- the composition B comprises the acids of i) and ii) and/or their salts at a total concentration from 10% to 100% by weight, based on a total of the composition B,
- the ready-to-use composition has an alkaline pH in the range from 7.3 to 11 and comprises the acids of i) and ii) and/or their salts at a total concentration in the range of 1% to 10% by weight, based on a total of the ready-to-use composition,
- the composition B comprises the acids of (i) and (ii) at a weight ratio (i)/(ii) ranging from 10:1 to 1:250,
- the hair is put under tension before, during, or after application of the ready-to-use composition, and
- the tension is released from the hair before or during application of the fixing composition or prior to rinsing off the applied fixing composition off the hair.
10 more elements
Dependencies are inferred from the claim text.