Agents for reducing the damage to hair during bleaching and dyeing
First Claim
1. An aqueous composition adapted to change the color of hair by the action of nascent oxygen therein, said composition having water, an oxidizing agent and an effective content of a diphosphonic compound selected from the group consisting of aminopropane diphosphonic acids of the formula ##STR2## wherein R1 and R2 each represent H or C1-3 alkyl, and the water-soluble salts thereof as an agent inhibiting the effect of said oxygen in degrading said hair.
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Abstract
Compositions for changing the color of hair by the action (direct or indirect) of compounds therein which release nascent oxygen, do less harm to the hair when they have a content of a water-soluble 3-amino-1-hydroxypropane-1,1-diphosphonic compound. The compound can be in free acid or water-soluble salt or partial ester form. Hair which is pre-treated with one of the mentioned diphosphonic compounds is at least partially protected against the action of nascent oxygen.
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Citations
14 Claims
- 1. An aqueous composition adapted to change the color of hair by the action of nascent oxygen therein, said composition having water, an oxidizing agent and an effective content of a diphosphonic compound selected from the group consisting of aminopropane diphosphonic acids of the formula ##STR2## wherein R1 and R2 each represent H or C1-3 alkyl, and the water-soluble salts thereof as an agent inhibiting the effect of said oxygen in degrading said hair.
- 7. An aqueous alkaline bleaching solution containing 3% to 9% by weight of a water-soluble peroxide and 0.01% to 10% by weight of a diphosphonic compound selected from the group consisting of aminopropane diphosphonic acids of the formula ##STR3## wherein R1 and R2 each represent H or C1-3 alkyl, and the water-soluble salts thereof.
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11. A method of changing the color of hair which comprises rinsing said hair with an aqueous solution of a compound which releases nascent oxygen in said solution and an effective amount of a diphosphonic compound selected from the group consisting of aminopropane diphosphonic acids of the formula:
- ##STR4## wherein R1 and R2 each represent H or C1-3 alkyl, and the water-soluble salts thereof as an agent inhibiting the effect of said oxygen in degrading said hair.
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12. A cream emulsion of the oil-in-water type for the treatment of hair, wherein the aqueous phase has a dissolved content of a compound providing nascent oxygen as hair bleaching component and 0.01% to 10% by weight of a diphosphonic compound selected from the group consisting of aminopropane diphosphonic acids of the formula:
- ##STR5## wherein R1 and R2 each represent H or C1-3 alkyl, and the water-soluble salts thereof.
- 13. A method of protecting hair against damage by aqueous solutions having a dissolved content of an agent which releases nascent oxygen, which comprises pre-rinsing said hair with an effective amount of an aqueous alkaline solution of a diphosphonic compound selected from the group consisting of aminopropane diphosphonic acids of the formula ##STR6## wherein R1 and R2 each represent H or C1-3 alkyl, and the water soluble salts thereof.
Specification