Skin treatment composition
First Claim
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1. A cosmetically acceptable aqueous composition for topical application to human skin, which comprises:
- (i) from 0.1 to 20% by weight of 2-hydroxyoctanoic acid;
(ii) from 0.1 to 50% by weight of ethyl lactate; and
(iii) an amount of an alkanolamine sufficient to adjust the pH of the composition to a value of from 3.8 to 4.5.
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Abstract
A cosmetically acceptable composition for topical application to human skin comprises from 0.1 to 20% by weight of a substituted 2-hydroxyoctanoic acid or 2-ketooctanoic acid or a mixture thereof, together with an amount of a special neutralizing agent sufficient to adjust the pH of the composition to a value of from 3 to 7. The special neutralizing agent is one having a cation whose ionic radius is at least 100 pm.
36 Citations
17 Claims
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1. A cosmetically acceptable aqueous composition for topical application to human skin, which comprises:
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(i) from 0.1 to 20% by weight of 2-hydroxyoctanoic acid; (ii) from 0.1 to 50% by weight of ethyl lactate; and (iii) an amount of an alkanolamine sufficient to adjust the pH of the composition to a value of from 3.8 to 4.5.
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2. A cosmetically acceptable aqueous composition for topical application to human skin, which comprises:
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(i) from 0.1 to 20% by weight of 2-hydroxyoctanoic acid; (ii) from 0.1 to 20% by weight of 2-hydroxypropionic acid; (iii) from 0.1 to 50% by weight of ethyl lactate; and (iv) and an amount of an alkanolamine sufficient to adjust the pH of the composition to a value of from 3.8 to 4.5.
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3. A cosmetically acceptable aqueous composition for topical application to human skin, which composition comprises:
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(i) from 0.1 to 20% by weight of a substituted octanoic acid chosen from 2-hydroxyoctanoic acid, 2-ketooctanoic acid or a mixture thereof; (ii) an amount of neutralising agent sufficient to adjust the pH of the composition to a value of from 3 to 7, the neutralising agent having a cation whose ionic radius is at least 100 pm; and (iii) from 0.1 to 50% by weight of a C2 to C4 alkyl lactate selected from the group consisting of ethyl lactate, n-propyl lactate, iso-propyl lactate, n-butyl lactate, iso-butyl lactate and mixtures thereof. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A method for the treatment of acne which comprises applying topically to acneic skin an effective amount of a cosmetically acceptable aqueous composition comprising:
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(i) from 0.1 to 20% by weight of a substituted octanoic acid chosen from 2-hydroxyoctanoic acid, 2-ketooctanoic acid or a mixture thereof; and (ii) an amount of neutralising agent sufficient to adjust the pH of the composition to a value of from 3 to 7, the neutralising agent having a cation whose ionic radius is at least 100 pm. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification