Method of treating hair or skin with a personal care composition in a foam form
A method of treating hair or skin with a creamy foam. The method comprises dispensing a personal care composition from a mechanical foam dispenser as a dosage of foam, applying the dosage of foam to hair or skin, and rinsing the dosage of foam from hair or skin. The personal hair composition contains a surfactant system that is substantially free of sulfate-based surfactants. The personal hair composition has a viscosity of less than 60 cP and a lather volume greater than 77 cm 3 .
1. A method of treating hair or skin with a creamy foam, the method comprising:
a. dispensing a personal care composition from a mechanical foam dispenser as a dosage of foam; wherein the dispenser does not contain a propellant or is substantially free of a propellant;
b. applying the dosage of foam to hair or skin;
c. rinsing the dosage of foam from hair or skin;
wherein the personal care composition comprises:
a viscosity of less than 60 cP;
a lather volume greater than 77 cm 3 ;
from about 50% to about 90%, by weight of the composition, water;
from about 10% to about 50%, by weight of the composition, a surfactant system wherein the surfactant system comprises:
(i) from about 10% to about 30%, by weight of the composition, of an acyl glutamate;
(ii) from about 0.5% to about 7%, by weight of the composition, of a zwitterionic co-surfactant;
wherein the surfactant system is substantially free of sulfate-based surfactants.
2. The method of claim 1 , wherein the mechanical foam dispenser is a pump foam dispenser or a squeeze foam dispenser.
3. The method of claim 1 , wherein the personal care composition comprises a lather volume from about 90 cm 3 to about 183 cm 3 .
4. The method of claim 1 , wherein the personal care composition comprises a lather volume greater than 85 cm 3 .
5. The method of claim 1 , wherein the personal care composition comprises a viscosity from from about 4 cP to about 45 cP.
6. The method of claim 1 , wherein the personal care composition comprises a viscosity less than 50 cP.
7. The method of claim 1 , wherein the dosage of foam comprises a bubble size distribution comprising an R 32 of from about 5 um to about 100 um.
8. The method of claim 1 , wherein the dosage of foam comprises a yield point of from about 5 Pa to about 100 Pa.
9. The method of claim 1 , wherein the dosage of foam comprises a density of from about 0.02 g/cm 3 to about 0.2 g/cm 3 .
10. The method of claim 1 , wherein the personal care composition comprises from about 20% to about 40%, by weight of the composition, surfactant system.
11. The method according to of claim 1 , wherein the surfactant system further comprises an anionic co-surfactant selected from the group consisting of isethionates, sarcosinates, sulfosuccinates, sulfonates, sulfoacetates, glucosides, acyl glycinates, acyl alaninates, glucose carboxylates, amphoacetates, taurates, and mixture thereof.
12. The method of claim 10 , wherein the surfactant system comprises from about 1% to about 10%, by weight of the composition, anionic co-surfactant.
13. The method according to claim 10 , wherein the anionic co-surfactant comprises sodium cocoyl isethionate.
14. The method according to claim 1 , wherein the zwitterionic surfactant is selected from the group consisting of cocamidopropyl betaine (CAPB), lauramidopropyl betaine (LAPB), and combinations thereof.
15. The method according to claim 1 , wherein the surfactant system comprises a weight ratio of anionic surfactant to zwitterionic surfactant greater than 4:1.
16. The method according to claim 1 , wherein the composition is substantially free of a viscosity reducing agent selected from the group consisting of propylene glycol, dipropylene glycol, alcohols, glycerin, and combinations thereof.
17. The method according to claim 1 , wherein the composition is substantially free of a thickener selected from the group consisting of acrylate polymers and co-polymers, xanthan gum, and combinations thereof.
18. The method according to claim 1 , wherein the composition comprises a shampoo composition and the shampoo composition further comprises a conditioning agent selected from the group consisting of silicone conditioning agents, organic conditioning materials, and combinations thereof.
19. The method according to claim 1 , wherein the composition comprises a shampoo composition and the shampoo composition further comprises an anti-dandruff active selected from the group consisting of piroctone olamine, pyridinethione salts, azoles, selenium sulfide, particulate sulfur, salicylic acid, zinc pyrithione, and mixtures thereof.
20. The method according to claim 1 , wherein the dosage of foam comprises a volume of from about 5 cm 3 to about 150 cm 3 .