Methods and compositions for inhibiting free radical polymerization in skin and hair
AssigneeFan Tech Ltd.
InventorsAlan Wohlman, Anthony J. O'Lenick JR.
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Abstract
A method is provided for inhibiting free radical degradation in the skin of a human or nonhuman animal comprising contacting the skin with a skin treatment composition having a concentration of a 1-(3-methoxybenzyl)-3-substituted thiourea compound effective for inhibiting free radical generation. Skin protecting compositions comprising a free radical inhibiting concentration of a 1-(3-methoxybenzyl)-3-substituted thiourea compound, and optionally a sunscreeen composition, are also provided.
Claims27
A method for inhibiting free radical degradation of skin or hair of a human or nonhuman animal comprising contacting the skin or hair with a composition comprising a 1-(3-methoxybenzyl)-3-substituted thiourea compound of formula I
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- in a concentration which is effective to inhibit free radical polymerization, wherein R is selected from the group consisting of C1-C20 linear or branched alkyl;
- C5-C7 cycloalkyl;
- alkoxy-substituted C5-C7 cycloalkyl;
- hydroxy-substituted C5-C7 cycloalkyl;
- C6-C7 aryl;
- hydroxy-substituted C6-C7 aryl;
- and alkoxy-substituted C6-C7 aryl.
A composition for inhibiting free radical degradation of skin or hair of a human or nonhuman animal comprising a base composition and an amount of a 1-(3-methoxybenzyl)-3-substituted thiourea compound of formula I
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- which is sufficient to provide a concentration of the compound of formula I effective to inhibit free radical polymerization, wherein R is selected from the group consisting of C1-C20 linear or branched alkyl;
- C5-C7 cycloalkyl;
- alkoxy-substituted C5-C7 cycloalkyl;
- hydroxy-substituted C5-C7 cycloalkyl;
- C6-C7 aryl;
- hydroxy-substituted C6-C7 aryl;
- and alkoxy-substituted C6-C7 aryl.
Dependencies are inferred from the claim text.