Method for testing sunscreens

Abstract

The sunscreen or makeup may be applied to a person who is wet, or even underwater, yet it will provide the full efficacy which it would have had had it been applied to the person when their skin was dry. In addition, it will be effective from the time that it is first applied, so no waiting period is required, as was the case for the so-called “water resistant” and “waterproof” sunscreens of the prior art. A series of test procedures which illustrate the efficacy of the “wet-appliable” sunscreens of the present invention are disclosed.

I claim:  
     
         1 . A sunscreen which may be applied to wet skin which provides instant, waterproof protection upon application, said sunscreen comprising: 
 (a) a primary water-in-oil emulsifier; and    (b) at least one sunscreen selected from the group consisting of an oil soluble sunscreen and an inorganic sunscreen.    
     
     
         2 . The sunscreen of    claim 1    further comprising at least one lipophillic emollient.  
     
     
         3 . The sunscreen of    claim 2    wherein the lipophillic emollient is a volatile emollient.  
     
     
         4 . The wet appliable sunscreen of    claim 3    wherein the primary water-in-oil emulsifier is selected from the group consisting of dimethicone and dimethicone copolyol.  
     
     
         5 . The wet appliable sunscreen of    claim 4    wherein the primary water-in-oil emulsifier is present by weight percentage of between 2% and 10%.  
     
     
         6 . The wet appliable sunscreen of    claim 4    wherein the primary water-in-oil emulsifier is present by weight percentage of about 8%.  
     
     
         7 . The wet appliable sunscreen of    claim 4    wherein the primary water-in-oil emulsifier is selected from the group consisting of SF 1328, Arlacel P135, DC 3225C, DC 5200, Abil EM-90, and Abil WE-09.  
     
     
         8 . The wet appliable sunscreen of    claim 3    wherein the volatile emollient is selected from the group consisting of cyclomethicone, low molecular weight dimethicones, and Permethyls.  
     
     
         9 . The wet appliable sunscreen of    claim 8    wherein the volatile emollient is present in a weight percentage of between about 5% and 20%.  
     
     
         10 . The wet appliable sunscreen of    claim 3    wherein the volatile emollient is present in a weight percentage of about 5%.  
     
     
         11 . The wet appliable sunscreen of    claim 3    wherein the oil soluble sunscreen is octyl methoxycinnamate.  
     
     
         12 . The wet appliable sunscreen of    claim 3   , further comprising a substance to provide stabilization, thickening, and water resistance selected from the group consisting of siliconyl beeswax, polyethylene hydrogenated castor oil, beeswax, alkyl modified silicones, mineral waxes, and vegetable waxes.  
     
     
         13 . The wet appliable sunscreen of    claim 3   , further comprising a non-volatile emollient ester.  
     
     
         14 . The wet appliable sunscreen of    claim 13   , wherein said non-volatile emollient ester is diisodecyl adipate.  
     
     
         15 . The wet appliable sunscreen of    claim 3   , further comprising a stabilizer.  
     
     
         16 . The wet appliable sunscreen of    claim 15    wherein said stabilizer is Arlacel P135.  
     
     
         17 . The wet appliable sunscreen of    claim 3   , further comprising a film thickener.  
     
     
         18 . The wet appliable sunscreen of    claim 17    wherein said film thickener is selected from the group consisting of Ganex V220, polyethylene, PVP polymers, and acrylate resins.  
     
     
         19 . The wet appliable sunscreen of    claim 3   , further comprising a fragrance.  
     
     
         20 . The wet appliable sunscreen of    claim 19    wherein said fragrance is MF-3871.  
     
     
         21 . The wet appliable sunscreen of    claim 3   , further comprising an antioxidant.  
     
     
         22 . The wet appliable sunscreen of    claim 21    wherein said antioxidant is vitamin E acetate.  
     
     
         23 . The wet appliable sunscreen of    claim 3   , further comprising a hydrophilic surfactant.  
     
     
         24 . The wet appliable sunscreen of    claim 23    wherein said hydrophilic surfactant is Plantaren 2000.  
     
     
         25 . The wet appliable sunscreen of    claim 3   , further comprising a preservative.  
     
     
         26 . The wet appliable sunscreen of    claim 25    wherein said preservative is Germaben II.  
     
     
         27 . The wet appliable sunscreen of    claim 3   , further comprising a salt.  
     
     
         28 . The wet appliable sunscreen of    claim 27    wherein said salt is selected from the group consisting of sodium chloride, magnesium sulfate, and potassium chloride.  
     
     
         29 . The wet appliable sunscreen of    claim 3    further comprising deionized water.  
     
     
         30 . The sunscreen of    claim 1    wherein the inorganic sunscreen is selected from the group consisting of titanium dioxide and zinc oxide.  
     
     
         31 . A sunscreen ointment which can be applied to a wet human which provides instant protection comprising: 
 (a) petroleum jelly; and    (b) an oil soluble sunscreen.    
     
     
         32 . A sunscreen gel which can be applied to a wet human which provides instant protection comprising: 
 (a) mineral oil;    (b) an emollient; and    (c) an oil soluble sunscreen.    
     
     
         33 . The sunscreen gel of    claim 32    in which the emollient is cyclomethicone.  
     
     
         34 . The sunscreen gel of    claim 33    in which the oil soluble sunscreen is octyl methoxycinnamate.  
     
     
         35 . The sunscreen gel of    claim 34    comprising: 
 (a) mineral oil in about 35.65 weight percent;  
 (b) DC 345 cyclomethicone in about 33.00 weight percent; and  
 (c) octyl methoxycinnamate in about 7.50 weight percent.  
 
     
     
         35 . The sunscreen gel of    claim 34    further comprising an alkyl galactomannan material.  
     
     
         36 . The sunscreen gel of    claim 35    wherein the alkyl galactomannan material is selected from the group consisting of N'Hance AG 50 and AG200.  
     
     
         37 . A wet appliable sunscreen comprising: 
 (a) about 8% SF 1328;    (b) about 5% DC 345;    (c) about 7.5% ESCALOL 557;    (d) about 5% Trivent DIDA;    (e) about 4% Escalol 567;    (f) about 2% siliconyl beeswax;    (g) about 1% Arlacel P135;    (h) about 2% Ganex V220;    (i) about 0.25% Fragrance MF-3871;    (j) about 0.50% Vitamin E Acetate;    (k) about 0.10% Plantaren 2000;    (l) about 1% Sodium Chloride;    (m) about 1% Germaben II; and    (n) about 62.65% deionized water.    
     
     
         38 . A procedure for testing the efficacy of a wet-appliable sunscreen comprising: 
 (a) placing subjects into a hot, high humidity room until they have been sweating profusely for about 10 minutes;    (b) applying a sunscreen product to be tested and a control product to said subjects while they are in said hot room; and then    (c) removing said subjects from said hot room and evaluating the SPF of the product being tested as compared to said control product.    
     
     
         39 . A procedure for testing the efficacy of a wet-appliable sunscreen comprising: 
 (a) submerging subjects in whirlpool containing water;    (b) applying a sunscreen product to be tested and a control product to said subjects while they are in said whirlpool; and then    (c) removing said subjects from said whirlpool and evaluating the SPF of the product being tested as compared to said control product.    
     
     
         40 . A procedure for testing the efficacy of a wet-appliable sunscreen comprising: 
 (a) wetting the backs of subjects using water;    (b) applying a sunscreen product to be tested and a control product to the backs of said subjects while they are wet;    (c) allowing the sunscreen products to dry for about twenty minutes; and then    (d) immersing said subjects in a whirlpool; and then    (e) removing said subjects from said whirlpool and evaluating the SPF of the product being tested as compared to said control product.    
     
     
         41 . A procedure for testing the efficacy of a wet-appliable sunscreen comprising: 
 (a) applying a sunscreen product to be tested and a control product to subjects; and    (b) then without awaiting the drying of said sunscreen products, immediately evaluating the SPF of the product being tested as compared to said control product.    
     
     
         42 . A method of providing instant sun protection to a human, comprising: 
 applying to said human a water-in-oil sunscreen emulsion comprising: 
 (a) a primary water-in-oil emulsifier;  
 (b) at least one volatile emollient;  
 (c) an oil soluble sunscreen; and  
 (d) an inorganic sunscreen selected from the group consisting of titanium dioxide and zinc oxide.  
   
     
     
         43 . A method of providing sun protection to a human having wet skin, comprising: 
 applying to the wet skin of said human an oil soluble sunscreen.    
     
     
         44 . The method of    claim 43    in which said sunscreen emulsion further comprises: 
 (a) a primary water-in-oil emulsifier; and  
 (b) at least one volatile emollient.  
 
     
     
         45 . A method of providing instant sun protection to a human comprising: 
 applying to the wet skin of said human an oil soluble sunscreen.    
     
     
         46 . A makeup providing instant sunscreen protection which comprises: 
 (a) about 8.00% SF 1328 without emulsifier;    (b) about 5.00% cyclomethicone DC 345;    (c) about 4.00% octyl stearate;    (d) about 2.00% aluminum stearate;    (e) about 1.25% Castorwax MP 70;    (f) about 1.00% siliconyl beeswax;    (g) about 7.50% octyl methoxycinnamate;    (h) about 2.00% oxybenzone;    (i) about 3.00% Z-cote zinc oxide;    (j) about 15.00% titanium dioxide #328;    (k) about 0.50% red iron oxide #7067;    (l) about 1.00% yellow iron oxide #7059;    (M) about 1.80% brown iron oxide #7050;    (n) about 0.10% black iron oxide #7133;    (o) about 46.15% deionized water;    (p) about 0.10% Planteren 2000;    (q) about 0.60% sodium chloride; and    (r) about 1.00% Germaben IIE.