Compositions and methods for treating conditions of compromised skin barrier function
Compositions and methods useful in treating dermatological disorders are described. The methods include applying to the skin a composition comprising a reactive reinforcing component and a cross-linking component, wherein the cross-linking component facilitates a reaction to form a film in situ on the skin.
1. A composition comprising a reactive reinforcing component comprising 1) a reactive constituent comprising at least one alkenyl functionalized organopolysiloxane and at least one hydride functionalized organopolysiloxane; 2) a reinforcing constituent; and (3) one or more therapeutic agent,
wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component comprises vinyl groups,
wherein the reactive reinforcing component has a molar ratio of vinyl to hydride functional groups of between about 1:35 to about 1:100, and
wherein the one or more therapeutic agent is a moisturizer, mineral oil, petroleum jelly, coal tar, anthralin, corticosteroids, fluocinonide, vitamin D3 analoges, retinoids, methotrexate, cyclosporine, a monoclonal antibody, pimecrolimus, tacrolimus, azathioprine, fluoruracil, salicylic acid, benzoyl peroxide, antibiotics, alpha-hydroxy acids, or a combination thereof,
wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component is a vinyl terminated polydimethylsiloxane;
the vinyl terminated polydimethylsiloxane of the reactive reinforcing component is of formula IIa:
wherein R 1a′ , R 3a′ , R 4a′ , R 5a′ , R 6a′ , R 8a′ , R 9a′ and R 10a′ are each independently selected from the group consisting of hydrogen, C 1-20 alkyl, C 2-20 alkenyl, C 5-10 aryl, hydroxyl and C 1-20 alkoxyl; and p and q are each independently an integer from between 10 and about 6000; and
the at least one hydride functionalized polysiloxane is selected from the group consisting of hydride terminated polydimethylsiloxane; polyphenyl-(dimethylhydrosiloxy)siloxane, hydride terminated; methylhydrosiloxane-phenylmethylsiloxane copolymer, hydride terminated; methylhydrosiloxane-dimethylsiloxane copolymers, trimethylsiloxy terminated; polymethylhydrosiloxanes, trimethylsiloxy terminated; polyethylhydrosiloxane, triethylsiloxane, methylhydrosiloxane-phenyloctylmethylsiloxane copolymer; methylhydrosiloxane-phenyloctylmethylsiloxane terpolymer and combinations thereof.
2. The composition of claim 1 , wherein said reactive reinforcing component has a viscosity of between about 5,000 and about 1,000,000 cSt or cP at 25° C.
3. The composition of claim 1 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component has a viscosity of at least about 165,000 cSt or cP at 25° C.
4. The composition of claim 1 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component is selected from the group consisting of vinyl terminated polydimethylsiloxane; vinyl terminated diphenyl siloxane-dimethylsiloxane copolymers; vinyl terminated polyphenylmethylsiloxane, vinylphenylmethyl terminated vinylphenylsiloxane-phenylmethylsiloxane copolymer; vinyl terminated trifluoropropylmethylsiloxane-dimethylsiloxane copolymer; vinyl terminated diethyl siloxane-dimethylsiloxane copolymer; vinylmethylsiloxane-dimethylsiloxane copolymer, trimethylsiloxy terminated; vinylmethylsiloxane-dimethylsiloxane copolymers, silanol terminated; vinylmethylsiloxane-dimethylsiloxane copolymers, vinyl terminated; vinyl gums; vinylmethylsiloxane homopolymers; vinyl T-structure polymers; monovinyl terminated polydimethylsiloxanes; vinylmethylsiloxane terpolymers; vinylmethoxysilane homopolymers and combinations thereof.
5. The composition of claim 1 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component has a weight percent of vinyl of between about 0.01 and about 0.1.
6. The composition of claim 1 , wherein the at least one hydride functionalized polysiloxane has a viscosity of at least about 5 cSt or cP at 25° C.
7. The composition of claim 1 , wherein the at least one hydride functionalized polysiloxane has a percent SiH content of between about 3 and about 45%.
8. The composition of claim 1 , wherein the at least one hydride functionalized polysiloxane has a SiH content of between about 0.5 and about 10 mmol/g.
9. The composition of claim 1 , wherein the at least one hydride functionalized polysiloxane is methylhydrosiloxane-dimethylsiloxane copolymers, trimethylsiloxy terminated.
10. The composition of claim 1 , wherein the reactive reinforcing component has a molar ratio of vinyl to hydride functional groups of between about 1:40 to about 1:80.
11. The composition of claim 1 , wherein the reactive reinforcing component has a molar ratio of vinyl to hydride functional groups of between about 1:50 to about 1:60.
12. The composition of claim 1 , wherein the composition is used in combination with phototherapy.
13. The composition of claim 10 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component is a vinyl terminated polydimethylsiloxane; and the at least one hydride functionalized polysiloxane is methylhydrosiloxane-dimethylsiloxane copolymers, trimethylsiloxy terminated.
14. The composition of claim 10 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component is a polymer of formula IIa:
and wherein R 1a′ , R 3a′ , R 4a′ , R 5a′ , R 6a′ , R 8a′ R 9a′ and R 10a′ are each independently C 1-20 alkyl; and p and q are each independently an integer from between 10 and 6000.
15. The composition of claim 10 , wherein the reactive reinforcing component comprises a vinyl terminated organopolysiloxane having a viscosity between about 150,000 and about 185,000 cSt or cP at 25° C., and an alkyl terminated hydride functionalized polysiloxane having a viscosity of between about 30 and about 100 cSt or cP at 25° C.
16. The composition of claim 11 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component is a vinyl terminated polydimethylsiloxane; and the at least one hydride functionalized polysiloxane is a methylhydrosiloxane-dimethylsiloxane copolymers, trimethylsiloxy terminated.
17. The composition of claim 11 , wherein the at least one alkenyl functionalized organopolysiloxane of the reactive reinforcing component is a polymer of formula IIa:
and
wherein R 1a′ , R 3a′ , R 4a′ , R 5a′ , R 6a′ , R 8a′ , R 9a′ and R 10a′ are each independently C 1-20 alkyl; and p and q are each independently an integer from between 10 and 6000.
18. The composition of claim 11 , wherein the reactive reinforcing component comprises a vinyl terminated organopolysiloxane having a viscosity between about 150,000 and about 185,000 cSt or cP at 25° C., and an alkyl terminated hydride functionalized polysiloxane having a viscosity of between about 30 and about 100 cSt or cP at 25° C.
19. A method for treating a dermatological disorder in a subject in need thereof, comprising: applying to the skin of the subject the composition of claim 1 , wherein the dermatological disorder is lichen simplex chronicus, cutaneous lupus, psoriasis, eczema, chronic dry skin, xeroderma, rosacea, ichthyosis, an ulcer, or any combination thereof.
20. The method of claim 19 , wherein the dermatological disorder is eczema.