| abstract |
The present invention relates to compositions which are useful as cosmetic or therapeutic agents for nails. The present compositions form films exhibiting a 7-day Toughness Value of from about 1.2 MPa to about 12 MPa. The films preferably further have a Rigidity Value of from about 500 to about 1300 MPa. The compositions also advantageously provide films having a 7-day Wear Value of from about 1000 (MPa)2 to about 5000 (MPa)2. The compositions and films are particularly useful as nail polishes providing improved wear. Preferred compositions contain, by weight of the composition, from about 5 % to about 20 % of a film forming cellulosic polymer; from about 1.25 % to about 8 %, of a film forming polyurethane polymer; from about 3 % to about 20 % of a plasticizer; and from about 55 % to about 90 % of a volatile, organic solvent. The invention also relates to films formed from the compositions, and methods of treating the nails comprising application of the composition to the nails. |