| 摘要 |
PURPOSE: A nail varnish composition containing in a cosmetically acceptable medium, film-forming gradient copolymer which contains two or more different monomeric units and exhibits a mass polydispersity index of 2.5 or less is provided. It enables formation of a film exhibiting desirable adhesion and maintenance due to the elapse of time. A cosmetic process for making up and/or caring for the nails is provided together with the application to the nails of the cosmetic composition. CONSTITUTION: The nail varnish composition comprises, in a cosmetically acceptable medium, at least one film-forming gradient copolymer containing two different monomeric units and exhibiting a mass polydispersity index(PI) of 2.5 or less, in which the composition can form a film having an adhesion corresponding to a detachment percentage of less than 45%, measured by ASTM D 3359-7. The gradient copolymer has a weight-average molecular weight of 5,000 to 1,000,000g/mole and a number-average molecular weight of 5,000 to 1,000,000g/mole and contains 1 to 99% by weight of two or more different monomeric units.
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