Methods and formulations for curling hair
Methods, formulations, and kits for curling and/or preventing damage in the curling of hair are disclosed herein. Hair can be curled by treatment with hydroxide-containing agents, in combination with one or more active agents, without the need for thiol-based or peroxide-based agents. The active agent can be applied simultaneously with the hydroxide-containing agent, to impart curl to the hair. They may be applied as a combined formulation or as separate formulations applied simultaneously. Use of the active agent along with a hydroxide-containing agent can be used to control the level of curl imparted to hair, as compared to the natural amount of curl, if any, in the untreated hair.
1. A method comprising:
(a) applying to hair a formulation comprising one or more hydroxide-containing agents and an active agent of Formula II:
wherein Z is a linker or is absent and the linker is not a polymer; m and n are each an integer independently selected from 1-6, and the sum of m+n is equal to or greater than 2;
B is a functional group capable of forming a covalent bond with a nucleophile and B is independently selected from the group consisting of:
wherein each R is independently selected from the group consisting of hydrogen, C 1-6 alkyl groups, aryl groups, and ionizable functional groups and Z′ is oxygen (O), NH or is absent, and G is carbon (C) and g is 1, or G is sulfur (S) and g is 2;
A is an ionizable functional group independently selected from the group consisting of carboxylic acids, sulfonic acids, phosphonic acids, and amines;
wherein the formulation has a pH of 10 or greater, and
(b) reshaping the hair;
wherein the method is substantially free of a sulfur-containing reducing agent; and
wherein steps (a) and (b) are not followed by an oxidizing step.
2. The method of claim 1 , wherein following steps (a) and (b), the hair retains curl when subjected to one or more wash cycles.
3. The method of claim 2 , wherein the curl is retained for at least about 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, or 50 wash cycles.
4. The method of claim 1 , wherein step (b) occurs prior to step (a).
5. The method of claim 4 , wherein the formulation is a combined formulation, and wherein prior to step (a), a first formulation comprising the one or more hydroxide-containing agents and a second formulation comprising the active agent of Formula II, are mixed to form the combined formulation.
6. The method of claim 1 , wherein the one or more hydroxide-containing agents and active agent are in a weight ratio in the range of about 5:1 to 1:5.
7. The method of claim 1 , wherein the one or more hydroxide-containing agents are selected from the group consisting of sodium hydroxide, lithium hydroxide, potassium hydroxide, guanidinium hydroxide, and ammonium hydroxide.
8. The method of claim 1 , wherein the active agent is present in an amount ranging from about 0.5 wt % to about 20 wt % of the formulation.
9. The method of claim 1 , wherein the step of reshaping the hair comprises (i) rolling the hair on a roller, rod, or curler, or a combination thereof; or (ii) braiding or twisting the hair; or a combination of (i) and (ii).
10. The method of claim 1 , further comprising:
(c) applying to the hair a second active agent formulation comprising a second active agent, wherein the second active agent is maleic acid or a simple salt thereof, acrylic acid or a simple salt thereof, methyl acrylic acid or a simple salt thereof, vinyl sulfonic acid or a simple salt thereof,
or a mixture thereof;
wherein step (c) occurs subsequent to step (b).
11. The method of claim 10 , wherein the second active agent formulation comprises about 0.1 wt % to about 5 wt % of the second active agent.
12. The method of claim 10 , wherein the second active agent is selected from the group consisting of maleic acid, acrylic acid, methyl acrylic acid, and vinyl sulfonic acid, and simple salts thereof.
13. The method of claim 1 , wherein the formulation has a pH of 10.5 or greater.
14. A method comprising:
(a) applying to hair a formulation comprising one or more hydroxide-containing agents and an active agent of Formula II:
wherein Z is a linker or is absent and the linker is not a polymer; m and n are each an integer independently selected from 1-6, and the sum of m+n is equal to or greater than 2;
B is a functional group capable of forming a covalent bond with a nucleophile and B is independently selected from the group consisting of:
wherein each R is independently selected from the group consisting of hydrogen, C 1-6 alkyl groups, aryl groups, and ionizable functional groups and Z′ is oxygen (O), NH or is absent, and G is carbon (C) and g is 1, or G is sulfur (S) and g is 2;
A is an ionizable functional group independently selected from the group consisting of carboxylic acids, sulfonic acids, phosphonic acids, and amines;
wherein the formulation has a pH of 10 or greater, and
(b) reshaping the hair;
wherein the method is substantially free of a sulfur-containing reducing agent; and
wherein the method does not include an oxidizing step.
15. The method of claim 14 , wherein following steps (a) and (b), the hair retains curl when subjected to one or more wash cycles.
16. The method of claim 14 , wherein the formulation is a combined formulation, and wherein prior to step (a), a first formulation comprising the one or more hydroxide-containing agents and a second formulation comprising the active agent of Formula II, are mixed to form the combined formulation.
17. The method of claim 14 , wherein the one or more hydroxide-containing agents and active agent are in a weight ratio in the range of about 5:1 to 1:5.
18. The method of claim 14 , wherein the one or more hydroxide-containing agents are selected from the group consisting of sodium hydroxide, lithium hydroxide, potassium hydroxide, guanidinium hydroxide, and ammonium hydroxide.
19. The method of claim 14 , wherein the active agent is present in an amount ranging from about 0.5 wt % to about 20 wt % of the formulation.
20. The method of claim 14 , wherein the step of reshaping the hair comprises (i) rolling the hair on a roller, rod, or curler, or a combination thereof; or (ii) braiding or twisting the hair; or a combination of (i) and (ii).
21. The method of claim 14 , further comprising:
(c) applying to the hair a second active agent formulation comprising a second active agent, wherein the second active agent is maleic acid or a simple salt thereof, acrylic acid or a simple salt thereof, methyl acrylic acid or a simple salt thereof, vinyl sulfonic acid or a simple salt thereof,
or a mixture thereof;
wherein step (c) occurs subsequent to step (b).
22. The method of claim 14 , wherein the formulation has a pH of 10.5 or greater.