Water based clear sunscreen and insect repellent composition

1. A substantially emulsifier-free, clear, stable, single phase, water based, homogeneous insect repellent sunscreen composition, consisting essentially of:

(a) about 1 weight % to about 45 weight % of a hydrophobic sunscreen component;

(b) about 3 weight % to about 70 weight % of an amido insect repellent component;

(c) about 10 weight % to about 60 weight % of at least one alcohol component having from 2 to 10 carbon atoms; and

(d) 5 weight % to about 40 weight % of water, said components (b) and (c) being present in an amount sufficient to provide a clear homogeneous composition, and wherein the amido insect repellent component serves as a co-solvent with the low molecular weight alcohol component to enable the water component and the hydrophobic sunscreen component to be combined to produce the single phase, clear, stable, water based, homogeneous insect repellent sunscreen composition, said composition being substantially emulsifier-free, all percents being by weight of the total composition.

2. The composition of claim 1 , wherein the oil soluble sunscreen component is at least one selected from the group consisting of benzophenone-3 (oxybenzone), dioxybenzone, menthyl anthranilate, para aminobenzoic acid (PABA), octyl methoxycinnamate (octinoxate), octocrylene, drometrizole trisiloxane, octyl salicylate (octisalate), homomenthyl salicylate (homosalate), octyl dimethyl PABA, butylmethoxy dibenzoylmethane (avobenzone), 4-methyl benzilidene camphor, octyl triazone, ethyl PABA, hydroxy methylphenyl benzotriazole, methylene bisbenzotriazoyl-tetramethylbutylphenol, bis-ethylhexyloxyphenol methoxyphenol triazine, and mixtures thereof.

3. The composition of claim 2 , wherein the amido insect repellent component is at least one selected from the group consisting of piperidine insect repellents and butylacetylaminopropionate ethyl ester.

4. The composition of claim 3 , wherein the piperidine insect repellent is at least one selected from the group consisting of picaridin and its stereoisomers, 1-(3-cyclohexen-1-ylcarbony 1)-2 -methylpiperidine and its stereoisomers, and mixtures thereof.

5. The composition of claim 1 , also including at least one water soluble sunscreen component selected from the group consisting of sulisobenzone, triethanolamine salicylate, terephthalylidene dicamphor sulfonic acid, phenylbenzimidazole sulfonic acid, and mixtures thereof.

6. The composition of claim 1 , wherein the amido insect repellent component varies from about 7% to about 50% by weight of the total composition.

7. The composition of claim 1 , wherein the alcohol component is at least one selected from the group consisting of ethanol, butanol, propyl alcohol, isopropyl alcohol, pentanol, methylcyclopentanol, hexanol, decanol, cyclohexanol, and mixtures thereof.

8. The composition of claim 1 , also including at least one film former.

9. The composition of claim 8 , wherein the film former is selected from the group consisting of acrylate polymers, acrylate copolymers, polyesters, cellulosic materials, polyurethane resins, carbomers, and mixtures thereof.

10. The composition of claim 1 , wherein sunscreen component is a liquid.

11. The composition of claim 1 , wherein the sunscreen component is a solid.

12. The composition of claim 1 , wherein the sunscreen composition has a Sun Protection Factor that varies from about 2 to about 60.

13. The composition of claim 1 , also including a polyol component.

14. The composition of claim 13 , wherein the polyol component is at least one selected from the group consisting of butylene glycol, dipropylene glycol, propylene glycol, hexylene glycol, glycerin, and mixtures thereof.

15. The composition of claim 14 , wherein the polyol component varies from about 1% to about 20% by weight of the total composition.

16. The composition of claim 1 , wherein the sunscreen is present in an amount of from about 5% to about 35%; the amido insect repellent is present in an amount of from about 10% to about 35%; the at least one alcohol is present in an amount of from about 15% to about 60%, and water is present in an amount of from about 10% to about 35%, the composition having an Sun Protection Factor of from about 8 to about 45.

17. The composition of claim 16 , also including a polyol component present in an amount of from about 1 weight % to about 20 weight % and a film former present in an amount of from about 0.05 weight % to about 10 weight %.

18. The composition of claim 17 , wherein the sunscreen is selected from the group consisting of benzophenone-3 (oxybenzone), dioxybenzone, menthyl anthranilate, para aminobenzoic acid (PABA), octyl methoxycinnamate (octinoxate), octocrylene, drometrizole trisiloxane, octyl salicylate (octisalate), homomenthyl salicylate (homosalate), octyl dimethyl PABA, butylmethoxy dibenzoylmethane (avobenzone), 4-methyl benzilidene camphor, octyl triazone, ethyl PABA, hydroxy methylphenyl benzotriazole, methylene bisbenzotriazoyl-tetramethylbutylphenol, bis-ethylhexyloxyphenol methoxyphenol triazine, and mixtures thereof; wherein the amido insect repellent is at least one selected from the group consisting of piperidine insect repellents and butylacetylaminopropionate ethyl ester; wherein the alcohol is selected from the group consisting of ethanol, butanol, propyl alcohol, isopropyl alcohol, pentanol, methylcyclopentanol, hexanol, decanol, cyclohexanol, and mixtures thereof; and wherein the polyol component is selected from the group consisting of butylene glycol, dipropylene glycol, propylene glycol, hexylene glycol, glycerin, and mixtures thereof.

19. The composition of claim 18 , wherein the film former is selected from the group consisting of acrylate polymers, acrylate copolymers, polyesters, cellulosic materials, polyurethane resins, carbomers, and mixtures thereof, and is present in an amount of from about 0.25 weight % to about 5 weight %.

20. A method for preparing a clear, water based, homogeneous insect repellent sunscreen composition of claim 1 comprising:

(a) admixing at least one oil soluble hydrophobic sunscreen component, at least one amido insect repellent component, at least one low molecular weight alcohol component, and water; wherein the amido insect repellent component and the alcohol component function as co-solvents to solubilize the hydrophobic sunscreen component with the water component to produce the clear, homogenous insect repellent sunscreen composition

21. The method of claim 20 , also including admixing the components with at least one polyol.

22. The method of claim 20 , wherein a first premix is formed comprising the sunscreen component, the amido insect repellent component, and the one low molecular weight alcohol component, wherein a second premix is formed comprising water, and wherein the second premix is added to the first premix with agitation.