Methods and formulations for curling hair
Methods, formulations, and kits for curling and/or preventing damage in the curling of hair are disclosed herein. Treatment with one or more hydroxide-containing agents in combination with one or more active agents can reshape hair, without the need for sulfur-containing reducing agents. To impart curl to hair, the active agent(s) and the hydroxide-containing agent(s) are applied either as a combined formulation or as separate formulations which are applied simultaneously. Use of the active agent along with a hydroxide-containing agent allows the level of curl imparted to hair to be controlled, 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
one or more active agents selected from the group consisting of maleic acid, acrylic acid, methyl acrylic acid, and vinyl sulfonic acid, and simple salts thereof; and
(b) reshaping the hair;
wherein the method is substantially free of a sulfur-containing reducing agent.
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 1 , wherein step (b) occurs prior to step (a).
4. The method of claim 1 , wherein the formulation is a combined formulation, and wherein prior to step (a), a first and a second formulation are mixed to form the combined formulation, wherein the combined formulation has a pH of about 10 or greater.
5. The method of claim 1 , wherein the weight ratio of the one or more hydroxide-containing agents to the one or more active agents is in the range of about 5:1 to about 1:5.
6. 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.
7. The method of claim 1 , wherein the active agent is present in an amount ranging from about 0.5 wt % to about 10 wt % of the formulation.
8. The method of claim 1 , wherein the step of reshaping the hair comprises rolling the hair on a roller, rod, or curler, or a combination thereof.
9. 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, and vinyl sulfonic acid or a simple salt thereof,
or a mixture thereof;
wherein step (c) occurs subsequent to step (b).
10. The method of claim 9 , wherein the second active agent formulation comprises about 0.1 to about 5 wt % of the second active agent.
11. A method comprising:
(a) applying to hair a formulation comprising one or more hydroxide-containing agents and
maleic acid or a salt or a mixture thereof;
wherein the pH of the formulation is about 10 or greater; and
(b) reshaping the hair;
wherein the method is substantially free of a sulfur-containing reducing agent.
12. The method of claim 11 , wherein following steps (a) and (b), the hair retains curl when subjected to one or more wash cycles.
13. The method of claim 11 , wherein step (b) occurs prior to step (a).
14. The method of claim 11 , wherein the formulation is a combined formulation, and wherein prior to step (a), a first and a second formulation are mixed to form the combined formulation, wherein the combined formulation has a pH of about 10 or greater.
15. The method of claim 11 , wherein the weight ratio of the one or more hydroxide-containing agents to the maleic acid is in the range of about 5:1 to about 1:5.
16. The method of claim 11 , 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.
17. The method of claim 11 , wherein the active agent is present in an amount ranging from about 0.5 wt % to about 10 wt % of the formulation.
18. The method of claim 11 , wherein the step of reshaping the hair comprises rolling the hair on a roller, rod, or curler, or a combination thereof.
19. The method of claim 11 , 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).
20. The method of claim 19 , wherein the second active agent formulation comprises about 0.1 to about 5 wt % of the second active agent.
21. A method comprising:
(a) applying to hair a formulation comprising one or more hydroxide-containing agents and one or more active agents selected from the group consisting of:
and
(b) reshaping the hair; and
wherein the method is substantially free of a sulfur-containing reducing agent.
22. The method of claim 21 , wherein following steps (a) and (b), the hair retains curl when subjected to one or more wash cycles.
23. The method of claim 21 , wherein step (b) occurs prior to step (a).
24. The method of claim 21 , wherein the formulation is a combined formulation, and wherein prior to step (a), a first and a second formulation are mixed to form the combined formulation, wherein the combined formulation has a pH of about 10 or greater.
25. The method of claim 21 , wherein the weight ratio of the one or more hydroxide-containing agents to the one or more active agents is in the range of about 5:1 to about 1:5.
26. The method of claim 21 , 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.
27. The method of claim 21 , wherein the active agent is present in an amount ranging from about 0.5 wt % to about 10 wt % of the formulation.
28. The method of claim 21 , wherein the step of reshaping the hair comprises rolling the hair on a roller, rod, or curler, or a combination thereof.
29. The method of claim 21 , 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).
30. The method of claim 29 , wherein the second active agent formulation comprises about 0.1 to about 5 wt % of the second active agent.