Oxidative treatment of hair with reduced hair damage
AssigneeThe Procter & Gamble Company
InventorsHenry Drummond Boswell, Jennifer Mary Marsh, John Scott Park, Michael Andrew Olshavsky
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Abstract
The present invention relates to hair care compositions comprising chelants and methods for reducing oxidative hair damage. The compositions contribute to reducing the oxidative damage sustained by keratinous fibers such as human hair during bleaching, dyeing, perming or other oxidative treatments. The compositions according to the present invention also provide excellent color evenness and color fastness.
Claims30
A composition suitable for treating hair comprising:
- a) an oxidizing agent;
- and
- b) a chelant;
- wherein said chelant is in an amount sufficient to provide a damage benefit of less than about 160 cysteic acid units as measured by the FT-IR Damage Assessing Protocol after a 5-Cycle Oxidative Hair Treatment Protocol With 2 Intermediate Washes, as described herein.
A method of treating hair, said method comprising the steps of:
- i) applying a first composition comprising an oxidizing agent;
- ii) applying a second composition comprising a chelant wherein said chelant is in an amount sufficient to provide a damage benefit of less than about 160 cysteic acid units as measured by the FT-IR Damage Assessing Protocol after a 5-Cycle Oxidative Hair Treatment Protocol With 2 Intermediate Washes, as described herein;
- and
- iii) applying a third composition comprising an oxidizing agent;
- wherein steps i) and iii) are separated by at least 1 day and step ii) does not take place immediately before step iii).
A composition suitable for treating hair comprising:
- a) an oxidizing agent;
- and
- b) a chelant;
- wherein said chelant is in an amount sufficient to provide a Normalized Shine Ratio of at least about 0.80 as measured by the Goniophotometer Damage Assessing Protocol after a 5-Cycle Hair Oxidative Treatment Protocol With 10 Intermediate Washes, as described herein.
A method of treating hair, said method comprising the steps of:
- i) applying a first composition comprising an oxidizing agent;
- ii) applying a second composition comprising a chelant wherein said chelant is in an amount sufficient to provide a Normalized Shine Ratio of at least about 0.80 as measured by the Goniophotometer Damage Assessing Protocol after a 5-Cycle Hair Oxidative Treatment Protocol With 10 Intermediate Washes, as described herein;
- and
- iii) applying a third composition comprising a second oxidizing agent;
- wherein steps i) and iii) are separated by at least 1 day and step ii) does not take place immediately before step iii).
Dependencies are inferred from the claim text.