Long-lasting easy wash-off cosmetic compositions

摘要

Cosmetic compositions are provided, which are capable of forming a cosmetic film on a human integument when applied thereto. Cosmetic compositions according to the invention typically include a cosmetically acceptable vehicle, optionally, one or more colorants, and a pH-dependent film-forming polymer of poly(methacrylic acid-co-methyl methacrylate) having a ratio of methacrylic acid to methyl methacrylate of about 1:1 to about 1:2, an acid value of from about 150 to about 350 mg KOH/g, and a weight average molar mass between about 100,000 and about 150,000 g/mol. The compositions are capable of forming an adherent film on the integument that is substantially resistant to removal by water at a first pH, but readily dispersible or soluble in water at a second pH higher than said first pH.

主权项

1. A method for forming a cosmetic film on a human integument comprising: applying to said human integument a cosmetic composition comprising a cosmetically acceptable vehicle, optionally, one or more colorants, and a pH-dependent film-forming polymer of poly(methacrylic acid-co-methyl methacrylate) with a ratio of methacrylic acid to methyl methacrylate of about 1:1 to about 1:2, an acid value of from about 150 to about 350 mg KOH/g, and a weight average molar mass between about 100,000 and about 150,000 g/mol, wherein said polymer is capable of forming an adherent film on a human integument that is resistant to removal by water at a first pH, but readily dispersible or soluble in water at a second pH higher than said first pH, with the proviso that said film forming polymer is not in the form of a microcapsule, wherein said cosmetic composition is a mascara.