Extended duration insect repellent composition and method of application to the skin

1. An insect repellent composition, comprising:

an amount of an insect repellent active effective to repel insects when the composition is applied to skin; and

an amount of a urethane polymer sufficient to form a film on the surface of the skin, wherein the urethane polymer has the following formula:

wherein R is any linear or branched alkyl, alkylene, aliphatic, cyclic, or aromatic group having from 1 to about 30 carbon atoms, wherein R′ is any linear or branched alkyl, alkylene, aliphatic, cyclic or aromatic group having from 6 to about 30 carbon atoms, and wherein n is an integer from 2 to about 1000.

2. The composition of claim 1 , further comprising a cosmetically-acceptable vehicle.

3. The composition of claim 1 , wherein R′ has 6 to about 24 carbon atoms.

4. The composition of claim 1 , wherein R′ is cyclic.

5. The composition of claim 1 , wherein the urethane polymer is about 0.1 wt. % to about 20 wt. % based on the total weight of the composition.

6. The composition of claim 1 , wherein the urethane polymer is about 0.5 wt. % to about 10 wt. % based on the total weight of the composition.

7. The composition of claim 1 , wherein the amount of insect repellent active is about 0.1 wt. % to about 70 wt. % based on the total weight of the composition.

8. The composition of claim 1 , wherein the urethane polymer does not form a hydrogel or a hydrogel film.

9. The composition of claim 1 , wherein the insect repellent active is selected from the group consisting of N,N diethyl-m-toluamide, ethyl butylacetylaminopropionate, hydroxy-ethyl isobutyl piperidine carboxylate, oil of citronella, soy bean oil, lemon grass oil, geranium/geraniol oil, p-menthane-3,8-diol, and mixtures thereof.

10. The composition of claim 1 , wherein the composition is in the form selected from the group consisting of a cream, lotion, gel, solution, towelette, mousse, stick, ointment, spray, and aerosol.

11. The composition of claim 1 , further comprising a sunscreen.

12. The composition of claim 11 , wherein the sunscreen is selected from a group consisting of oxybenzone, sulisobenzone, dioxybenzone, menthyl anthranilate, para aminobenzoic acid (PABA), octyl methoxycinnamate, octocrylene, drometrizole trisiloxane, octyl salicylate, homomenthyl salicylate, octyl dimethyl PABA, triethanolamine salicylate, titanium dioxide, zinc oxide, butylmethoxy dibenzoylmethane, methyl benzilidene camphor, octyl triazone, terephthalydiene dicamphor, sulfonic acid, ethyl PABA, hydroxy methylphenyl benzotriazole, methylene bis-benzotriazoyltetramethylbutylphenol, bis-octyloxyphenol methoxyphenol triazine, and mixtures thereof.

13. The composition of claim 12 , wherein the sunscreen is selected from a group consisting of oxybenzone, octyl methoxycinnamate, octocrylene, octyl salicylate, titanium dioxide, zinc oxide, butylmethoxy dibenzoylmethane, methylene bis-benzotriazoyltetramethylbutylphenol, bis-octyloxyphenol methoxyphenol triazine, and mixtures thereof.

14. An insect repellent composition, comprising:

an amount of an insect repellent active effective to repel insects when the composition is applied to skin;

about 0.1 wt. % to about 20 wt. % based on the total weight of the composition of a urethane polymer, wherein the urethane polymer forms a film on the surface of the skin, wherein the urethane polymer has the following formula:

wherein R is any linear or branched alkyl, alkylene, aliphatic, cyclic, or aromatic group having from 1 to about 30 carbon atoms, wherein R′ is any linear or branched alkyl, alkylene, aliphatic, cyclic or aromatic group having from 6 to about 30 carbon atoms, and wherein n is an integer from 2 to about 1000; and

a cosmetically-acceptable vehicle.

15. The composition of claim 14 , wherein R′ is cyclic.

16. The composition of claim 14 , wherein R′ has 6 to about 24 carbon atoms.

17. An insect repellent composition comprising:

an effective amount of an insect repellent;

a film-forming urethane polymer; and

a volatile component,

wherein the composition is dispensed from a spray container, wherein the urethane polymer has the following formula:

wherein R is any linear or branched alkyl, alkylene, aliphatic, cyclic, or aromatic group having from 1 to about 30 carbon atoms, wherein R′ is any linear or branched alkyl, alkylene, aliphatic, cyclic or aromatic group having from 6 to about 30 carbon atoms, and wherein n is an integer from 2 to about 1000.

18. The composition of claim 17 , wherein the composition is substantially anhydrous.

19. The composition of claim 17 , wherein the spray container is selected from the group consisting of a pump spray container and an aerosol spray container.

20. The composition of claim 17 , wherein the volatile component is selected from the group consisting of one or more alcohols, hydrocarbons, ethers, silicones, water, and mixtures thereof.

21. The composition of claim 17 , wherein R′ has 6 to about 24 carbon atoms.

22. A method of repelling insects from the skin, comprising applying to the skin the composition of claim 1 .

23. The method of claim 22 , wherein the urethane polymer is about 0.1 wt. % to about 20 wt. % based on the total weight of the composition.

24. The method of claim 22 , wherein R′ is cyclic.

25. The method of claim 22 , wherein the insect repellent active is about 0.1 wt. % to about 70 wt. % based on the total weight of the composition.

26. The composition of claim 22 , wherein R′ has 6 to about 24 carbon atoms.