Enhanced efficiency of sunscreen compositions

Abstract

Compositions comprising UV blocking agents, a film forming polymer containing acid groups and a neutralizing agent; compositions and methods for increasing the SPF of a composition by neutralizing at least a portion of the acid groups of the film forming agent with the neutralizing agent.

1 . An aqueous volatile solvent-based composition comprising at least one UV absorbing active ingredient and at least one film forming polymer containing a plurality of acid groups and a volatile solvent, wherein the polymer is present in an amount greater than 1% by weight of the composition and wherein at least a portion of the acid groups have been neutralized with a cosmetically acceptable neutralizing agent. 
     
     
         2 . The composition of  claim 1  wherein the cosmetically acceptable neutralizing agent is an amine-based neutralizing agent. 
     
     
         3 . The composition of  claim 2  wherein the amine-based neutralizing agent is an alkylamine, alkenylamine, dialkylamine, dialkenylamine, dimethyl alkylamine, methyl dialkylamine, trialkylamine, dimethyl alkenylamine, methyl dialkenylamine, trialkenylamine, or a combination or mixture thereof wherein each alkyl is independently selected from a straight or branched chain alkyl group having at least 3 carbon atoms, a cycloalkyl group having at least 3 carbon atoms, or a combination thereof. 
     
     
         4 . The composition of  claim 2 , wherein the amine-based neutralizing agent has the structure: 
       
         
           
           
               
               
           
         
         wherein R 1  is a C 3  to about C 36  straight chain, branched or cyclic alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group, and R 2 , and R 3  are independently selected from H, CH 3 , or C 2  to about C 36  linear chain, branched or cyclic alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group wherein said amine based agent can optionally contain one or more heteroatoms. 
       
     
     
         5 . The composition of  claim 2  which comprises an amine-based neutralizing agent having the structure: 
       
         
           
           
               
               
           
         
       
       wherein R 8  is C 2  to about C 36  straight chain, branched or cyclic alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group, and R 9  is selected from H or CH 3 , or C 2  to C 36  straight chain, branched or cyclic alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group, and wherein x and y are independently 1 to 100 and wherein said amine based agent can optionally contain one or more heteroatoms. 
     
     
         6 . The composition of  claim 2  wherein the amine-based neutralizing agent has the structure: 
       
         
           
           
               
               
           
         
         wherein R 10  R 11 , and R 12  are independently selected from H, CH 3  or C 2  to about C 36  straight chain, branched or cyclic alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group, and wherein n is 1 to 100 and wherein said amine based agent can optionally contain one or more heteroatoms. 
       
     
     
         7 . The composition of  claim 2  wherein the amine-based neutralizing agent has the structure: 
       
         
           
           
               
               
           
         
       
       wherein R 6  is H or CH 3  and x and y are independently from about 1 to about 100. 
     
     
         8 . The composition of  claim 2  wherein the amine-based neutralizing agent has the structure: 
       
         
           
           
               
               
           
         
       
       wherein x is from about 1 to about 100. 
     
     
         9 . The composition of  claim 2  wherein the amine-based neutralizing agent has the structure: 
       
         
           
           
               
               
           
         
       
       wherein x, y and z are independently from about 1 to about 100. 
     
     
         10 . The composition of  claim 2  wherein the amine-based neutralizing agent has the structure: 
       
         
           
           
               
               
           
         
       
       wherein R 7  is H or C 2 H 5  and n, x, y and z are independently from about 1 to about 100. 
     
     
         11 . The composition of  claim 2 , wherein the film forming polymer comprises two or more distinct monomer units, wherein at least one of said monomers comprises a carboxylic acid moiety. 
     
     
         12 . The composition of  claim 2 , wherein said film forming polymer comprises a plurality of distinct monomers wherein at least one of said monomers comprises from about 5 to about 95 percent of the total monomer content. 
     
     
         13 . The composition of  claim 2 , wherein said film forming polymer comprises a plurality of distinct monomers wherein at least one of said monomers comprises from about 5 to about 50 percent of the total monomer content. 
     
     
         14 . The sunscreen composition of  claim 2 , wherein said film forming polymer comprises a plurality of distinct monomers wherein at least one of said monomers comprises from about 5 to about 25 percent of the total monomer content. 
     
     
         15 . The composition of  claim 2 , wherein from about 5 to about 100 percent of the plurality of acid groups of the film forming polymer are neutralized by said amine-based neutralizing agent. 
     
     
         16 . The composition of  claim 2 , wherein from about 5 to about 50 percent of the plurality of acid groups of the film forming polymer are neutralized by said amine-based neutralizing agent. 
     
     
         17 . The composition of  claim 2 , wherein from about 5 to about 25 percent of the plurality of acid groups of the film forming polymer are neutralized by said amine-based neutralizing agent. 
     
     
         18 . The composition of  claim 2 , wherein said acid groups on the film forming polymer are chosen from the group consisting of carboxylic acids, sulfonic acids, phosphoric acids, or a combination thereof. 
     
     
         19 . The composition of  claim 2 , wherein said at least one film forming polymer is chosen from polyacrylic acid, polycrotonic acid, polymethacrylic acid, polymaleic acid, polyitaconic acid, octylacrylamide/acrylates/butylaminoethyl methacrylate compolymer, acrylates/octylacrylamide copolymer, acrylates copolymer, octylacrylamide/butylaminoethyl methacrylate copolymer, VA/crotonates/vinyl neodecanoate copolymer, VA/Crotonates copolymer, sodium polystyrene sulfonate, polyurethane-14 (and) AMP-Acrylates copolymer, acrylates/octylacrylamide copolymer, acrylates/steareth-20 itaconate, copolymer, acrylates/ceteth-20 itaconate copolymer, PVM/MA half ethyl ester copolymer, butylated PVP, PVP/hexadecene copolymer, PVP/eicosene copolymer, tricontanyl PVP, butyl ester of PVM/MA copolymer, PVM/MA copolymer, ethyl ester of PVM/MA copolymer, butyl ester of PVM/MA copolymer, vinyl caprolactam/PVP/dimethylaminoethyl methacrylate copolymer, polyquaternium-11, polyquaternium-28, Polyimide-1, PVP/Vinylcaprolactam/DMAPA Acrylates Copolymer, Isobutylene/Ethylmaleimide/Hydroxyethylmaleimide Copolymer, Acrylates/C1-2 Succinates/Hydroxyacrylates Copolymer, PVP/DMAPA Acrylates Copolymer, VP/Acrylates/Lauryl Methacrylate Copolymer, \Polyquaternium-55, PVP/Dimethylaminoethylmethacrylate Copolymer, VinylcaprolactamNP/Dimethylaminoethyl Methacrylate Copolymer, VA/Butyl Maleate/Isobornyl Acrylate Copolymer, acrylic acid/ethyl acrylate/t-butyl acrylamide, t-butyl acrylate/ethyl acrylate/methacrylic acid, ethyl acrylate/t-butyl acrylate/methacrylic acid, polyquaternium-16, polyquaternium-16, PVP, PVPNA copolymer, PVPNA copolymer, Polyurethane-1, VP/MethacrylamideNinyl Imidazole Copolymer, Acrylates Copolymer, Acrylates/Acrylamide Copolymer, Polyvinylcaprolactam, Dimethicone/Acrylates Copolymer; Amerchol, acrylic acid/methacrylic acid/acrylates/methacrylates, acrylic acid/methacrylic acid/acrylates/methacrylates/hydroxy ester acrylates; methacryloyl ethyl betaine/acrylates copolymer, Acrylates/Hydroxyesters Acrylates Copolymer, Ethylenecarboxyamide/AMPSA/Methacrylates Copolymer, methacrylic acid/sodium acrylamidomethyl propane sulfonate copolymer, AMP-Acrylates/Allyl Methacrylate Copolymer, Polyacrylates-X, Acrylates/C10-30 Alkyl Acrylates Copolymer, Acrylates Copolymer, Polyurethane-2, Polyurethane-4, PPG-17/IPDI/DMPA Copolymer; polyethylene glycol; water-soluble acrylics; water-soluble polyesters; polyacrylamides; polyamines; polyquaternary amines; styrene maleic anhydride (SMA) resin; or mixtures or combinations thereof. 
     
     
         20 . A method for increasing the SPF for an aqueous volatile solvent-based composition comprising at least one sunscreen active agent and at least one film forming polymer, wherein the film forming polymer comprises a plurality of acid groups, the method comprising adding an amine-based neutralizing agent to the composition in an amount effective to neutralize at least a portion of the acid groups in said film forming polymer, wherein the film forming polymer is present in an amount greater than 1% by weight of the final composition. 
     
     
         21 . The method of  claim 20 , wherein the film forming polymer is present in an amount of from greater than 1% to about 10% by weight of the final composition. 
     
     
         22 . The method of  claim 20 , wherein the film forming polymer is present in an amount of from greater than 1% to about 5% by weight of the final composition. 
     
     
         23 . The method of  claim 20 , wherein the film forming polymer is present in an amount of from greater than 1% to about 3% by weight of the final composition. 
     
     
         24 . The method of  claim 20 , wherein at least 5% of the acid groups of the film forming polymer are neutralized by the amine-based neutralization agent. 
     
     
         25 . The method of  claim 20 , wherein at least 10% of the acid groups of the film forming polymer are neutralized by the amine-based neutralization agent. 
     
     
         26 . The method of  claim 20 , wherein at least 25% of the acid groups of the film forming polymer are neutralized by the amine-based neutralization agent. 
     
     
         27 . The method of  claim 20 , wherein at least 50% of the acid groups of the film forming polymer are neutralized by the amine-based neutralization agent. 
     
     
         28 . The method of  claim 20 , wherein the resulting composition exhibits an SPF 125% of the SPF of the un-neutralized composition. 
     
     
         29 . The method of  claim 20 , wherein the resulting composition exhibits an SPF 150% of the SPF of the un-neutralized composition. 
     
     
         30 . The method of  claim 20 , wherein the resulting composition exhibits an SPF 200% of the SPF of the un-neutralized composition. 
     
     
         31 . The method of  claim 20 , wherein said amine neutralizing agent is alkylamine, alkenylamine, dialkylamine, dialkenylamine, dimethyl alkylamine, methyl dialkylamine, trialkylamine, dimethyl alkenylamine, methyl dialkenylamine, trialkenylamine, or a combination or mixture thereof. 
     
     
         32 . The method of  claim 20 , wherein said acid groups on the film forming polymer comprise carboxylic acid groups, sulfonic acid groups, phosphoric acid groups, or a combination thereof. 
     
     
         33 . A method for increasing the SPF of an aqueous volatile solvent-based composition comprising at least one sunscreen active agent and a film forming polymer containing a plurality of acid groups and at least one volatile solvent, wherein at least a portion of said plurality of acid groups are neutralized by an amine-based neutralizing agent, wherein the film forming polymer is present in an amount greater than 1% by weight of the final composition. 
     
     
         34 . A method for increasing the SPF of an aqueous volatile solvent-based composition comprising at least one sunscreen active agent, said method comprising adding to said composition a film forming polymer, wherein said film forming polymer comprises a plurality of acid groups, wherein at least a portion of said acid groups have been neutralized with an effective amount of a amine-based neutralizing agent wherein the film forming agent is present in an amount greater than 1% by weight of the final composition. 
     
     
         35 . A method for reducing the deleterious effects of UV radiation that contacts a surface which comprises applying to the surface the composition of  claim 1 . 
     
     
         36 . The method of  claim 35 , wherein the surface is skin or hair. 
     
     
         37 . A method for preventing or reducing the occurrence of erythema on a subject due to exposure to UV radiation which comprises applying the composition of  claim 1  to the subject prior to exposure to UV radiation. 
     
     
         38 . A method for preventing or reducing photoaging of the skin of a subject due to exposure to UV radiation which comprises applying the composition of  claim 1  to the subject prior to exposure to UV radiation. 
     
     
         39 . A method for preventing or reducing the occurrence of phototoxic or photoallergic reactions in a subject due to exposure to UV radiation which comprises applying the composition of  claim 1  to the subject prior to exposure to UV radiation. 
     
     
         40 . The composition of  claim 1  wherein the solvent is chosen from the group consisting of ethanol, isopropanol, methanol and acetone.