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US 12,409,120 B2Granted
Process for permanent waving keratin fibers
AssigneeKao Germany GmbH
InventorSteven Breakspear
Life of this patent
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Abstract
Compositions and processes disclosed herein permanent wave keratin fibers and/or human hair for achieving durable waves. The keratin fibers and/or human hair are treated with a reducing composition, a non-reducing and non-oxidizing composition comprising tris(hydroxymethyl)aminomethane, optionally a non-reducing and non-oxidizing acidic composition. Subsequently, the keratin fibers and/or human hair are treated with an oxidizing composition wherein after processing the reducing composition is rinsed off the keratin fibers and/or human hair.
Claims8
A process for permanently waving keratin fibers, the process comprising:
- a—washing and/or shampooing and towel drying keratin fibers;
- b—applying an aqueous composition onto the keratin fibers, wherein the aqueous compositions has a pH in the range of 3 to 12, comprises one or more reducing agents at a total concentration in the range of 0.5 to 20% by weight, calculated to a total weight of the aqueous composition in b-, and is left on the keratin fibers for a period of 1 to 60 min;
- c—rinsing off the keratin fibers;
- d—putting the keratin fibers onto one or more curlers;
- e—applying a first non-reducing and non-oxidizing aqueous composition onto the keratin fibers, wherein the first non-reducing and non-oxidizing aqueous composition comprises tris(hydroxymethyl)aminomethane (TRIS) at a total concentration in the range of 3 to 20% by weight, calculated to a total weight of the first non-reducing and non-oxidizing aqueous composition, has a pH in the range of 7.5 to 12, and is left on the keratin fibers for a period of 1 to 60 min;
- f—optionally rinsing off the keratin fibers;
- g—optionally applying a second non-reducing and non-oxidizing aqueous composition onto the keratin fibers, wherein the second non-reducing and non-oxidizing aqueous composition comprises one or more organic and/or one or more inorganic acids, has a pH in the range of 2 to 6.5, and is optionally left on the keratin fibers for a period of 1 to 60 min;
- h—rinsing off the keratin fibers;
- i—applying an aqueous composition onto the keratin fibers, wherein the aqueous composition comprises one or more oxidizing agents at a total concentration in the range of 0.1 to 10% by weight, calculated to a total weight of the aqueous composition in i—, has a pH in the range of 2 to 8, and is left on the keratin fibers for a period of 1 to 30 min;
- j—rinsing off the keratin fibers;
- and
- k—drying the keratin fibers,
- wherein
- the one or more curlers are taken off from keratin fibers after i—prior to rinsing of and/or drying or after rinsing off the keratin fibers after j—, and
- the process as a whole is carried out at ambient temperature without using any heat and/or heating device.
12 more elements
Dependencies are inferred from the claim text.