Compositions and methods for restoring epidermal integrity and function and treating dermatological diseases
Novel isohexide esters and isohexide compositions are prepared and used in improving skin health and condition.
1. A topical composition comprising
a) an isohexide according to Structure 1
wherein R 1 and R 2 , which are the same or different, are independently selected from H and a C 15 to C 19 saturated or unsaturated n-alkyl carboxylate group, provided that both R 1 and R 2 are not hydrogen, in combination with
b) one or more additional isohexides according to Structure 1 wherein the isohexide is a different isomer from that of isohexide (a) or at least one of R 1 and R 2 , is different from the R 1 and R 2 of isohexide (a), or both, provided that the limitations of (a) with respect to R 1 and R 2 are still met, or
c) one or more isohexides corresponding to Structure 5
wherein R 4 and R 5 are the same or different and are independently selected from H and saturated or unsaturated n-alkyl carboxylate groups provided that the n-alkyl carboxylate groups are other than n-alkyl carboxylate groups of 15 to 19 carbon atoms and provided that both R 4 and R 5 are not H, or
d) both (b) and (c),
in a dermatologically acceptable carrier, said isohexides comprising 0.5 to 30 weight percent of the topical composition and the carbon number for the n-alkyl carboxylate groups referring the number of carbon atoms of the group excluding the carboxylate carbon.
2. The composition of claim 1 wherein one of R 1 and R 2 of isohexide (a) is H.
3. The composition of claim 1 wherein R 1 and R 2 of isohexide (a) are the same and are selected from n-alkyl carboxylate groups having from 16 to 19 carbon atoms.
4. The composition of claim 1 wherein at least one of R 1 and R 2 of isohexide (a) has 17 carbon atoms.
5. The composition of claim 1 wherein both R 1 and R 2 of isohexide (a) have 17 carbon atoms.
6. The composition of claim 1 wherein at least one of R 1 and R 2 of isohexide (a) is a mono- or poly-unsaturated n-alkyl carboxylate group.
7. The composition of claim 1 wherein at least one of R 1 and R 2 of isohexide (a) is a poly-unsaturated n-alkyl carboxylate group.
8. The composition of claim 1 wherein the isohexides are isosorbides, isomannides or isoiodides or a combination of any two or all three.
9. The composition of claim 1 wherein isohexide (a) is an isosorbide.
10. The composition of claim 1 wherein a mixture of isohexides according to Structure 1 are present, and at least 50 mole % of those isohexides are isosorbides.
11. The composition of claim 1 wherein a mixture of isohexides according to Structure 1 are present, and at least 40 mole % of the n-alky carboxylate groups of those isohexides are the same.
12. The composition of claim 1 wherein a mixture of isohexides according to Structure 1 are present, and at least 70 mole % of the n-alky carboxylate groups of those isohexides are the same.
13. The composition of claim 1 wherein a mixture of isohexides according to Structure 1 are present and both R 1 and R 2 of isohexide (b) are different from the R 1 and R 2 of the isohexide (a).
14. The composition of claim 1 wherein at least one isohexide according to Structure 5, isohexide (c), is present.
15. The composition of claim 14 wherein the n-alkyl group(s) R 4 and R 5 of Structure 5 have from 1 to 10 carbon atoms.
16. The composition of claim 14 wherein the n-alkyl group(s) R 4 and R 5 of Structure 5 have from 1 to 9 carbon atoms.
17. The composition of claim 14 wherein at least 50% by weight of the isohexides comprise one or more isohexides according to Structure 1.
18. The composition of claim 14 wherein at least 70% by weight of the isohexides comprise one or more isohexides according to Structure 1.
19. The isohexide composition of claim 1 which is the reaction product of a dianhydrohexitol material and a natural oil containing a plurality of fatty acids having from 16 to 20 carbon atoms and/or the triglyceride precursor of said fatty acids.
20. The isohexide composition of claim 19 wherein the natural oil contains a combination saturated and/or unsaturated fatty acids of from 16 to 20 carbon atoms.
21. The isohexide composition of claim 19 wherein the natural oil contains a combination of mono- and/or poly-unsaturated fatty acids of 16 to 20 carbon atoms.
22. The isohexide composition of claim 19 wherein the natural oil is selected from the group consisting of oils isolated from safflower, grape seed, silybum marianum , hemp, sunflower, wheat germ, pumpkin seed, sesame, rice bran, almond, rapeseed, peanut, olive, and coconut.
23. The composition of claim 1 further comprising one or more skin care actives or therapeutic agents.
24. The isohexide composition of claim 19 wherein the dianhydrohexitol is isosorbide, isomannide or isoiodide or a combination of any two or all three.
25. The isohexide composition of claim 19 wherein the natural oil is sunflower oil.