Scalp care composition
A scalp care composition comprising from 1% to 99% of a volatile carrier; from 0.05% to 10% of a polymeric rheology modifier and mixtures thereof; from 0.03% to 1% of particulate scalp benefit agent wherein the composition is shear thinning and has (1) a zero shear viscosity value measured at 0.01 Pa of greater than about 1,500 Pa s; (2) a moderate stress viscosity value measured at 1 Pa viscosity of greater than about 1,000 Pa s; and (3) a high shear rate viscosity value measured at 100 l/s of less than about 0.5 Pa s.
1. A leave-on scalp care composition comprising:
a) from about 1% to about 99% of a volatile carrier wherein the volatile carrier comprises an organic solvent selected from the group consisting of dipropyleneglycol, propylene glycol, butylene glycol, 1,4-butanediol, 3-allyloxy-1,2-propanediol, dipropylene glycol n-butyl ether, 1,2-hexanediol, dimethyl isosorbide, ethanol, 1,3-butanediol, 1,3-propanediol, 2,2′-thiodiethanol, 1,6-hexanediol and combinations thereof;
b) from about 0.05% to about 10% of one or more polymeric rheology modifiers;
c) from about 0.03% to about 1% of particulate scalp benefit agent wherein the composition is shear thinning and has (1) a zero shear viscosity value measured at 0.01 Pa of greater than about 1,500 Pa s; (2) a moderate stress viscosity value measured at 1 Pa of greater than about 1,000 Pa s; and (3) a high shear rate viscosity value measured at 100 l/s of less than about 0.5 Pa s.
2. A scalp care composition according to claim 1 wherein the polymeric rheology modifier is selected from the group consisting of homopolymers of acrylic acid, methacrylic acid and derivatives, alkali swellable and hydrophobically-modified alkali swellable acrylic copolymers or methacrylate copolymers, crosslinked acrylic polymers, and associative polymeric thickeners and mixtures thereof.
3. A scalp care composition according to claim 2 wherein the polymeric rheology modifier is an acrylates/C10-C30 alkyl acrylate crosspolymer.
4. A scalp care composition according to claim 2 wherein the polymeric rheology modifier is a crosslinked acrylic polymer.
5. A scalp care composition according to claim 1 wherein the particulate scalp benefit agent is selected from the group consisting of metal pyridinethione salts, selenium sulfide, particulate sulfur, and mixtures thereof.
6. A scalp care composition according to claim 1 wherein particulate scalp benefit agent is zinc pyrithione.
7. A scalp care composition according to claim 1 wherein the composition further comprises glycerin.
8. A scalp care composition according to claim 1 wherein the composition further comprises niacinamide in the range of 0.1% to 7.5%.
9. A scalp care composition according to claim 1 wherein the composition further comprises caffeine in the range of 0.1% to 3.0%.
10. A scalp care composition according to claim 1 wherein the composition further comprises panthenol in the range of 0.01% to 2.0%.
11. A scalp care composition according to claim 1 wherein the composition further comprises a silicone.
12. The leave-on scalp care composition according to claim 1 wherein the composition is a leave-on composition wherein the leave-on composition is applied to keratinous tissue and allowed to remain on the keratinous tissue.