Cosmetic compositions containing polyurethane

Abstract

There is provided a cosmetic composition, preferably in the form of a nail polish, comprising a primary film former and one or more high-molecular weight polyurethanes.

Wherefore we claim:  
     
         1 . A cosmetic composition comprising: 
 a cellulose-based film forming agent; and    a polyurethane resin having a weight average molecular weight from about 20,000 to about 80,000 and a glass transition temperature (tg) of about −4° C. to about −40° C.    
     
     
         2 . The composition of  claim 1 , wherein said cellulose-based film forming agent is nitrocellulose.  
     
     
         3 . The composition of  claim 1 , wherein said cellulose-based film forming agent is present in an amount from about 5 wt % to about 15 wt % of the total weight of the composition.  
     
     
         4 . The composition of  claim 1 , wherein said polyurethane resin is selected from the group consisting of the general structures:  
       [—O—(CH(CH 3 )CH 2 O) x —C(O)—NH—R—NH—C(O)—]; [—O—(CH 2 CH 2 CH 2 CH 2 —O—) y —C(O)—NH—R—NH—C(O)—];  
       and combinations thereof, wherein R is an nonaromatic moiety, x is an integer of from 5 to 50, and y is an integer of from 5 to about 40.  
     
     
         5 . The composition of  claim 4 , wherein R is an aliphatic moiety.  
     
     
         6 . The composition of  claim 5 , wherein a glass transition temperature (tg) of about −4° C. to about −20° C.  
     
     
         7 . The composition of  claim 1 , wherein said polyurethane resin is present in an amount from about 2 wt % to about 15 wt % of the total weight of the composition.  
     
     
         8 . The composition of  claim 1 , further comprising a arylsulfonamide epoxy resin.  
     
     
         9 . The composition of  claim 8 , wherein said arylsulfonamide epoxy resin is tosylamide epoxy resin.  
     
     
         10 . The composition of  claim 8 , wherein said arylsulfonamide epoxy resin present in an amount about 1 wt % to about 15 wt % of the total weight of the composition.  
     
     
         11 . The composition of  claim 1 , further comprising a solvent in an amount from about 45 wt % to about 95 wt % of the total weight of the composition.  
     
     
         12 . The composition of  claim 1 , further comprising one or more of: a plasticizer, a stabilizing agent, or a pigment.  
     
     
         13 . The composition of  claim 12 , wherein the composition contains a plasticizer in an amount about 1 wt % to about 9 wt % of the total weight of the composition.  
     
     
         14 . A nonaqueous cosmetic composition comprising: 
 a cellulose-based film forming agent present in an amount from about 5 wt % to about 15% by weight of the total weight of the composition; and    a polyurethane resin having a weight average molecular weight from about 20,000 to about 80,000 and present in an amount from about 2 wt % to about 15 wt % by weight of the total weight of the composition.    
     
     
         15 . The composition of  claim 14 , wherein said cellulose-based film forming agent is nitrocellulose.  
     
     
         16 . The composition of  claim 14 , wherein said polyurethane resin has a t g  of about −4° C. to about −40° C.  
     
     
         17 . The composition of  claim 14 , wherein said polyurethane resin is selected from the group consisting of the general structures:  
       [—O—(CH(CH 3 )CH 2 O) x —C(O)—NH—R—NH—C(O)—]; [—O—(CH 2 CH 2 CH 2 CH 2 —O—) y —C(O)—NH—R—NH—C(O)—];  
       and combinations thereof, wherein R is a non-aromatic moiety, x is an integer of from 5 to 50, and y is an integer of from 5 to about 40.  
     
     
         18 . The composition of  claim 17 , wherein R is an aliphatic moiety.  
     
     
         19 . The composition of  claim 18 , wherein x is 20 and wherein y is 10.  
     
     
         20 . The composition of  claim 18 , wherein the polyurethane resin has a glass transition temperature (t g ) of about −4° C. to about −20° C.  
     
     
         21 . The composition of  claim 14 , further comprising an arylsulfonamide epoxy resin in an amount about 1 wt % to about 15 wt % of the total weight of the composition.  
     
     
         22 . The composition of  claim 16 , wherein said arylsulfonamide epoxy resin is tosylamide epoxy resin.  
     
     
         23 . The composition of  claim 17 , further comprising a plasticizer present in an amount about 1 wt % to about 9 wt % of the total weight of the composition.  
     
     
         24 . A nonaqueous nail polish composition comprising: 
 a solvent in an amount about 45 wt % to about 95 wt %;    a primary film former in an amount about 5 wt % to about 15 wt %;    an aliphatic polyurethane resin having a weight average molecular weight from about 20,000 to about 80,000 present in an amount from about 2 wt % to about 15 wt %;    a plasticizer in an amount from about 1 wt % to about 9 wt %;    a stabilizing agent in an amount from about 0.1 wt % to about 3 wt %; and    a pigment in an amount from about 0.01 wt % to about 10 wt % of the total weight of the composition.    
     
     
         25 . The composition of  claim 24  wherein the solvent is a mixture of about 20 wt % to about 40 wt % butyl acetate and about 20 wt % to about 40 wt % ethyl acetate; wherein the primary film former is nitrocellulose; wherein the plasticizer is toluene sulfonamide; and wherein the stabilizing agent is stearlkonium bentonite and stearlkonium hectorite.  
     
     
         26 . The composition of  claim 25  further comprising about 1 wt % to about 15 wt % tosylamide epoxy resin.  
     
     
         27 . A method of imparting an improved flexible, durable and/or transfer resistant cosmetic coating to human nails comprising applying to the nails the composition of  claim 1 .  
     
     
         28 . A method of imparting an improved flexible, durable and/or transfer resistant cosmetic coating to human nails comprising applying to the nails the composition of  claim 14.