Claims
- 1. A composition suitable for providing protection against the harmful effects of ultraviolet radiation, said composition comprising:
- a) a safe and effective amount of a UVA-absorbing dibenzoylmethane sunscreen active;
- b) a safe and effective amount of an aniline derivative having the formula ##STR13## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are independently selected from the group consisting of H, R', OR', CHO, CN, SO.sub.2 R', SO.sub.2 OR', NO, aryls, OH,SH, NHR', NR'.sub.2, SR', I, Cl, F, Br, and combinations thereof; wherein R' is a C.sub.1 -C.sub.30 straight or branched alkyl or an aryl; wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 can together form with each other bridged cyclic structures; and
- c) a suitable carrier.
- 2. The composition of claim 1 wherein the aniline derivative is selected from the group consisting of 4-phenoxyaniline, 2-butylaniline, 3,4-(methylenedioxy) aniline, p-phenetidine, 2,4,6-trimethyl-1,3-phenylene diamine, 4-chloro-2-methoxy-5-methylaniline, and mixtures thereof.
- 3. The composition of claim 1 wherein the aniline derivative is selected from the group consisting of 4-phenoxyaniline, 2-butylaniline, 4-chloro-2-methoxy-5-methylaniline, and mixtures thereof.
- 4. The composition of claim 1 wherein the UVA-absorbing dibenzoylmethane sunscreen active is selected from the group consisting of 2-methyldibenzoylmethane, 4-methyldibenzoylmethane, 4-isopropyldibenzoylmethane, 4-tert-butyldibenzoylmethane, 2,4-dimethyldibenzoylmethane, 2,5-dimethyldibenzoylmethane, 4,4'-diisopropylbenzoylmethane, 4-tert-butyl-4'-methoxydibenzoylmethane, 2-methyl-5-isopropyl-4'-methoxydibenzoylmethane, 2-methyl-5-tert-butyl-4'-methoxydibenzoylmethane, 2,4-dimethyl-4'-methoxydibenzoylmethane, 2,6-dimethyl-4'tert-butyl-4'methoxydibenzoylmethane, and mixtures thereof.
- 5. The composition of claim 1 wherein the UVA-absorbing dibenzoylmethane sunscreen active is selected from the group consisting of 4-tert-butyl-4'-methoxydibenzoylmethane, isopropyldibenzoylmethane, and mixtures thereof.
- 6. The composition of claim 1 wherein the UVA-absorbing dibenzoylmethane sunscreen active is 4-tert-butyl-4'-methoxydibenzoylmethane.
- 7. The composition of claim 1 wherein the composition comprises from about 0.01% to about 30%, by weight of the composition, of the UVA-absorbing dibenzoylmethane sunscreen active.
- 8. The composition of claim 1 wherein the composition comprises from about 0.1% to about 6%, by weight of the composition, of the UVA-absorbing dibenzoylmethane sunscreen active.
- 9. The composition of claim 1 wherein the composition comprises from about 1% to about 3%, by weight of the composition, of the UVA-absorbing dibenzoylmethane sunscreen active.
- 10. The composition of claim 1 wherein the mole ratio of the UVA-absorbing dibenzoylmethane sunscreen active to the aniline derivative is from about 8:1 to about 1:1.
- 11. The composition of claim 10 wherein the composition comprises from about 0.01% to about 30%, by weight of the composition, of the UVA-absorbing dibenzoylmethane sunscreen active and wherein the aniline derivative is selected from the group consisting of 4-phenoxyaniline, 2-butylaniline, 3,4-(methylenedioxy) aniline, p-phenetidine, 2,4,6-trimethyl-1,3-phenylene diamine, 4-chloro-2-methoxy-5-methylaniline, and mixtures thereof.
- 12. The composition of claim 11 wherein the UVA-absorbing dibenzoylmethane sunscreen active is selected from the group consisting of 2-methyldibenzoylmethane, 4-methyldibenzoylmethane, 4-isopropyldibenzoylmethane, 4-tert-butyldibenzoylmethane, 2,4-dimethyldibenzoylmethane, 2,5-dimethyldibenzoylmethane, 4,4'-diisopropylbenzoylmethane, 4-tert-butyl-4'-methoxydibenzoylmethane, 2-methyl-5-isopropyl-4'-methoxydibenzoylmethane, 2-methyl-5-tert-butyl-4'-methoxydibenzoylmethane, 2,4-dimethyl-4'-methoxydibenzoylmethane, 2,6-dimethyl-4'tert-butyl-4'methoxydibenzoylmethane, and mixtures thereof.
- 13. The composition of claim 10 wherein the mole ratio of the UVA-absorbing dibenzoylmethane sunscreen active to the aniline derivative is from about 4:1 to about 1:1.
- 14. The composition of claim 13 wherein the mole ratio of the UVA-absorbing dibenzoylmethane sunscreen active to the aniline derivative is from about 2:1 to about 1:1.
- 15. The composition of claim 14 wherein the composition comprises from about 0.1% to about 6%, by weight of the composition, of the UVA-absorbing dibenzoylmethane sunscreen active and wherein the aniline derivative is selected from the group consisting of 4-phenoxyaniline, 2-butylaniline, 4-chloro-2-methoxy-5-methylaniline, and mixtures thereof.
- 16. The composition of claim 15 wherein the UVA-absorbing dibenzoylmethane sunscreen active is selected from the group consisting of 4-tert-butyl-4'-methoxydibenzoylmethane, isopropyldibenzoylmethane, and mixtures thereof.
- 17. A method for providing protection against the harmful effects of ultraviolet radiation, said method comprising applying a safe and effective amount of the composition of claim 1 to skin.
- 18. composition suitable for providing protection against the harmful effects of ultraviolet radiation, said composition comprising:
- a) an effective amount of a UVA-absorbing dibenzoylmethane sunscreen active;
- b) an effective amount of an aniline derivative having the formula ##STR14## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are independently selected from the group consisting of H, R', OR', CHO, CN, SO.sub.2 R', SO.sub.2 OR', NO, aryls, OH,SH, NHR', NR'.sub.2, SR', I, Cl, F, Br, and combinations thereof; wherein R' is a C.sub.1 -C.sub.30 straight or branched alkyl or an aryl; wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 can together form with each other bridged cyclic structures; and
- c) a suitable carrier.
- 19. method of stabilizing a UVA-absorbing dibenzoylmethane sunscreen active, said method comprising combining an effective amount of a UVA-absorbing dibenzoylmethane sunscreen active with an effective amount of an aniline derivative having the formula ##STR15## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are independently selected from the group consisting of H, R', OR', CHO, CN, SO.sub.2 R', SO.sub.2 OR', NO, aryls, OH,SH, NHR', NR'.sub.2, SR', I, Cl, F, Br, and combinations thereof; wherein R' is a C.sub.1 -C.sub.30 straight or branched alkyl or an aryl; wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 can together form with each other bridged cyclic structures.
CROSS REFERENCE TO RELATED APPLICATION
This application is a Continuation-In-Part of application Ser. No. 09/174,307 filed Oct. 16, 1998, now abandoned.
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
174307 |
Oct 1998 |
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