Compositions and methods for treating hair
Disclosed are hair styling compositions comprising at least two latex polymers chosen from acrylate and polyurethane polymers, wherein at least one latex polymer is a film-forming polymer. Methods of styling the hair are also disclosed.
1. A hair styling composition comprising:
(a) latex polymer A having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%, wherein latex polymer A is Acrylates copolymer, Acrylates/Ethylhexyl Acrylate copolymer, Acrylates/VA copolymer, Polyurethane-34, Polyurethane-32, or Polyurethane-48; and
(b) latex polymer B having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%, wherein latex polymer B is Acrylates copolymer, Polyacrylate-2 crosspolymer, Styrene/Acrylic copolymer, Polyurethane-35, Polyurethane-1, or Polycarbamyl Polyglycol Ester;
wherein the weight ratio of latex polymers A:B ranges from about 10:1 to about 1:10; and
wherein latex polymers A and B are dispersed particles in an aqueous dispersion medium;
with the proviso that when latex polymer A is an acrylate latex polymer, then latex polymer B is a polyurethane latex polymer; and when a latex polymer A is a polyurethane latex polymer, then latex polymer B is an acrylate latex polymer.
2. The hair styling composition of claim 1 , wherein latex polymers A and B are present in a total combined amount ranging from about 0.5% to about 10% by weight, relative to the weight of the composition.
3. The hair styling composition of claim 1 , wherein latex polymers A and B are present in a total combined amount ranging from about 1% to about 5% by weight, relative to the weight of the composition.
4. The hair styling composition of claim 1 , wherein latex polymers A and B are present in a total combined amount ranging from about 1% to about 3% by weight, relative to the weight of the composition.
5. The hair styling composition of claim 1 , wherein latex polymers A and B are present in individual amounts ranging from about 0.05% to about 10% by weight, relative to the weight of the composition.
6. The hair styling composition of claim 1 , wherein latex polymers A and B are present in individual amounts ranging from about 1% to about 15% by weight, relative to the weight of the composition.
7. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B ranges from about 1:5 to about 5:1.
8. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B ranges from about 1:3 to about 3:1.
9. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B ranges from about 1:2 to about 2:1.
10. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B is about 1:1.
11. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B is about 1:10 to about 1:1.
12. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B is about 3:1 to about 10:1.
13. The hair styling composition of claim 1 , wherein the weight ratio of latex polymers A:B is about 5:1 to about 10:1.
14. The hair styling composition of claim 1 , further comprising at least one solvent.
15. A method of styling the hair, said method comprising applying to the hair a composition comprising:
(a) latex polymer A having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%, wherein latex polymer A is Acrylates copolymer, Acrylates/Ethylhexyl Acrylate copolymer, Acrylates/VA copolymer, Polyurethane-34, Polyurethane-32, or Polyurethane-48; and
(b) latex polymer B having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%, wherein latex polymer B is Acrylates copolymer, Polyacrylate-2 crosspolymer, Styrene/Acrylic copolymer, Polyurethane-35, Polyurethane-1, or Polycarbamyl Polyglycol Ester;
wherein the weight ratio of latex polymers A:B ranges from about 10:1 to about 1:10; and
wherein latex polymers A and B are dispersed particles in an aqueous dispersion medium;
with the proviso that when latex polymer A is an acrylate latex polymer, then latex polymer B is a polyurethane latex polymer; and when a latex polymer A is a polyurethane latex polymer, then latex polymer B is an acrylate latex polymer.
16. The method of claim 15 , further comprising a step of treating the hair with heat at a temperature ranging from about 25° C. to about 250° C. before, during, or after the application of said composition.