Gel-Based Lipstick Having Improved Rheology

Abstract

Gel-based lipstick compositions are disclosed comprising an ester terminated poly(ester-amide) (ETPEA) polymeric gellant, a first wax component having a melting point above the sol-gel transition temperature of the ETPEA gellant, a second wax compositions having a melting point equal to of below the sol-gel transition temperature of the ETPEA gellant, optionally a silicone T-resin co-gellent, and one or more oils capable of forming a gel with the ETPEA gellant. The gel compositions are solid or semi-solid at room temperature and are capable of being molded into self-supporting sticks. The disclosed gels provide high gloss films when applied to the lips and/or provide a rheology characterized by a high viscosity over repeated shear cycles.

1 . A cosmetic composition comprising:
 (a) from about 0.1 to about 40% by weight of an ester terminated poly(ester-amide) polymer comprising Bis-Stearyl Ethylenediamine/Neopentyl Glycol/Stearyl Hydrogenated Dimer Dilinoleate copolymer having an average molecular weight between about 3,000 and about 7,500 Daltons and being capable of forming a gel with low-polarity and nonpolar oils at or below a sol-gel transition temperature T gel  of about 75° C.;   (b) from about 0.1 to about 20% by weight of a first wax component comprising one or more waxes having a melting point above T gel ;   (c) from about 0.1 to about 20% by weight of a second wax component comprising one or more waxes having a melting point at or below T gel , said second wax component comprising beeswax; and   (d) one or more low-polarity or nonpolar oils capable of forming a gel with said ester terminated poly(ester-amide) polymer at or below said sol-gel transition temperature T gel .   
     
     
         2 - 64 . (canceled)