Sprayable Sunscreen Compositions and Methods

Abstract

Useful compositions are described herein that comprise a solvent base comprising at least one non-aqueous solvent; at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber; and a polymer reaction product of a random polymerization of at least one organic diol, at least one polycarboxylic acid and at least one polyol having at least three functional groups. Such compositions are particularly useful in clear compositions including sunscreens for personal care including spray sunscreen formulations that are applied to and effective on wet skin, hair or nails.

We claim: 
     
         1 . A composition, comprising:
 a solvent base comprising at least one non-aqueous solvent;   at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber; and   a polymer reaction product of a random polymerization of at least one organic diol, at least one polycarboxylic acid and at least one polyol having at least three functional groups.   
     
     
         2 . The composition according to  claim 1 , wherein the at least one non-aqueous solvent is an organic alcohol of about 1 to about 10 carbon atoms; an alkylene glycol; a polymeric alkylene glycol; a branched chain hydrocarbon of about 6 to about 22 carbon atoms; an alkyl ester or alkyl ether of an organic alcohol, an alkylene glycol, a branched chain hydrocarbon of about 6 to about 22 carbon atoms or a polymeric alkylene glycol; an alkyl ether or an alkyl ester; or combinations thereof. 
     
     
         3 . The composition according to  claim 2 , wherein the non-aqueous solvent comprises ethanol and/or a branched chain hydrocarbon of about 6 to about 22 carbon atoms. 
     
     
         4 . The composition according to  claim 2 , wherein the non-aqueous solvent is an alkylene glycol or a polymeric alkylene glycol selected from the group consisting of polypropylene glycol, polyethylene glycol and copolymers thereof; ethylene glycol; propylene glycol; butylene glycol; pentylene glycol; hexylene glycol; a diglycol; dodecane; a branched chain hydrocarbon of about 1 to about 22 carbon atoms. 
     
     
         5 . The composition according to  claim 2 , wherein the non-aqueous solvent is a dimethyl ether or a diethyl ether. 
     
     
         6 . The composition according to  claim 1 , wherein solvent base is at least about 35% to about 95% by weight of the composition. 
     
     
         7 . The composition according to  claim 6 , wherein at least about 85% to about 100% of the solvent base is the non-aqueous solvent. 
     
     
         8 . The composition according to  claim 6 , wherein the solvent base is about 35% to about 65% of the composition. 
     
     
         9 . The composition according to  claim 8 , wherein at least about 95% to about 100% of the solvent base is the non-aqueous solvent. 
     
     
         10 . The composition according to  claim 1 , wherein the composition comprises about 0.5% to about 75% of the at least one sunscreen active ingredient. 
     
     
         11 . The composition according to  claim 10 , wherein the composition comprises about 5% to about 70% of the at least one sunscreen active ingredient. 
     
     
         12 . The composition according to  claim 11 , wherein the composition comprises about 20% to about 50% of the at least one sunscreen active ingredient. 
     
     
         13 . The composition according to  claim 1 , wherein the at least one sunscreen active ingredient is selected from the group consisting of octocrylene, oxybenzone, octisalate, homosalate, avobenzone, octinoxate, and combinations thereof. 
     
     
         14 . The composition according to  claim 1 , wherein the at least one organic diol is 1,3-pentanediol, 2,2,4-trimethyl-1,3-pentanediol, 1,2-pentane diol, 2-methyl-1,3-propanediol and combinations thereof. 
     
     
         15 . The composition according to  claim 14 , wherein the at last one organic diol is 2,2,4-trimethyl-1,3-pentane diol. 
     
     
         16 . The composition according to  claim 1 , wherein the at least one polycarboxylic acid is selected from the group consisting of propanedioic acid; decanedioic acid; pentanedioic acid; hexanedioic acid; heptanedioic acid; octanedioic acid; nonanedioic acid; and decanedioic acid. 
     
     
         17 . The composition according to  claim 16 , wherein the at least one polycarboxylic acid is a diacid. 
     
     
         18 . The composition according to  claim 17 , wherein the at least one polycarboxylic acid is hexanedioic acid. 
     
     
         19 . The composition according to  claim 1 , wherein the at least one polyol is selected from the group consisting of dimerdiol, trimethylolpropane, ditrimethylolpropane, glycerol, 1,2,3-propane triol, and combinations thereof. 
     
     
         20 . The composition according to  claim 1 , wherein the polymer is a random polymer of 2,2,4-trimethyl-1,3-pentane diol, heptanedioic acid and glycerol. 
     
     
         21 . A method of preparing a sunscreen composition having a solvent base, comprising combining:
 (a) a non-aqueous solvent system;   (b) a polyester polymer formed as an esterification reaction product of at least one polycarboxylic acid, at least one organic diol and at least one polyol; and   (c) at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber.   
     
     
         22 . The method according to  claim 21 , wherein the non-aqueous solvent system comprises an alcohol of about 1 to about 10 carbon atoms and at least one branched chain hydrocarbon of about 6 to about 22 carbon atoms 
     
     
         23 . The method according to  claim 22 , wherein the at least one branched hydrocarbon comprises an isoparaffin and/or an isoalkane. 
     
     
         24 . The method according to  claim 21 , wherein the sunscreen active ingredient is a UV absorber that is a UV filtering compound. 
     
     
         25 . The method according to  claim 21 , further comprising combining (d) at least one ester oil in the composition. 
     
     
         26 . The method according to  claim 21 , wherein the at least one polycarboxylic acid, at least one organic diol and at least one polyol are reacted so as to have a ratio of organic diol:polycarboxylic acid:polyol of about 5:5:1 to about 25:25:1. 
     
     
         27 . The method according to  claim 25 , wherein the ratio of organic diol:polycarboxylic acid:polyol is about 10:10:1. 
     
     
         28 . The method according to  claim 21 , wherein the esterification occurs at about 100° C. to about 260° C. 
     
     
         29 . The method according to  claim 21 , wherein the esterification occurs at about 760 mm Hg to about 1 mm Hg. 
     
     
         30 . A composition suitable for use in a personal care formulation, comprising at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber; and a polymer reaction product of a random polymerization of at least one polycarboxylic acid, at least one organic diol and at least one polyol, wherein a ratio of organic diol:polycarboxylic acid:polyol is about 5:5:1 to about 25:25:1. 
     
     
         31 . A method of increasing a sunscreen protection factor of a personal care formulation having at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber, the method comprising providing to the personal care formulation a polyester polymer formed as an esterification reaction product of at least one polycarboxylic acid, at least one organic diol and at least one polyol. 
     
     
         32 . The method according to  claim 31 , wherein the personal care formulation is a sprayable sunscreen and the formulation comprises a non-aqueous solvent system. 
     
     
         33 . The method according to  claim 32 , wherein the non-aqueous solvent system comprises an alcohol of about 1 to about 10 carbon atoms and at least one branched chain hydrocarbon of about 6 to about 22 carbon atoms. 
     
     
         34 . The method according to  claim 31 , wherein the formulation further comprises at least one ester oil in the composition. 
     
     
         35 . The method according to  claim 31 , wherein the at least one polycarboxylic acid, at least one organic diol and at least one polyol are reacted so as to have a ratio of organic diol:polycarboxylic acid:polyol of about 5:5:1 to about 25:25:1. 
     
     
         36 . The method according to  claim 35 , wherein the ratio of organic diol:polycarboxylic acid:polyol is about 10:10:1. 
     
     
         37 . The method according to  claim 31 , wherein the esterification occurs at about 100° C. to about 260° C. and at about 760 mm Hg to about 1 mm Hg. 
     
     
         38 . A method of increasing water resistance of a personal care formulation having at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber, the method comprising providing to the personal care formulation a polyester polymer formed as an esterification reaction product of at least one polycarboxylic acid, at least one organic diol and at least one polyol. 
     
     
         39 . The method according to  claim 38 , wherein the personal care formulation is a sprayable sunscreen and the formulation comprises a non-aqueous solvent system. 
     
     
         40 . The method according to  claim 38 , wherein the non-aqueous solvent system comprises an alcohol of about 1 to about 10 carbon atoms and at least one branched chain hydrocarbon of about 6 to about 22 carbon atoms. 
     
     
         41 . The method according to  claim 38 , wherein the formulation further comprises at least one ester oil in the composition. 
     
     
         42 . The method according to  claim 38 , wherein the at least one polycarboxylic acid, at least one organic diol and at least one polyol are reacted so as to have a ratio of organic diol:polycarboxylic acid:polyol of about 5:5:1 to about 25:25:1. 
     
     
         43 . The method according to  claim 42 , wherein the ratio of organic diol:polycarboxylic acid:polyol is about 10:10:1. 
     
     
         44 . The method according to  claim 38 , wherein the esterification occurs at about 100° C. to about 260° C. and at about 760 mm Hg to about 1 mm Hg. 
     
     
         45 . A method of reducing a whitening effect of a personal care formulation having at least one sunscreen active ingredient that is a UV blocker and/or a UV absorber when applied to wet skin, the method comprising providing to the personal care formulation a polyester polymer formed as an esterification reaction product of at least one polycarboxylic acid, at least one organic diol and at least one polyol. 
     
     
         46 . The method according to  claim 45 , wherein the personal care formulation is a sprayable sunscreen and the formulation comprises a non-aqueous solvent system. 
     
     
         47 . The method according to  claim 45 , wherein the non-aqueous solvent system comprises an alcohol of about 1 to about 10 carbon atoms and at least one branched chain hydrocarbon of about 6 to about 22 carbon atoms. 
     
     
         48 . The method according to  claim 45 , wherein the formulation further comprises at least one ester oil in the composition. 
     
     
         49 . The method according to  claim 45 , wherein the at least one polycarboxylic acid, at least one organic diol and at least one polyol are reacted so as to have a ratio of organic diol:polycarboxylic acid:polyol of about 5:5:1 to about 25:25:1. 
     
     
         50 . The method according to  claim 50 , wherein the ratio of organic diol:polycarboxylic acid:polyol is about 10:10:1. 
     
     
         51 . The method according to  claim 45 , wherein the esterification occurs at about 100° C. to about 260° C. and at about 760 mm Hg to about 1 mm Hg.