Foam skin cream, uses of the foam skin protection cream and a process for its preparation

Abstract

A foam skin cream can be obtained by preparing a phase I by melting at 75° C. a mixture containing fatty acids, especially C 12 -C 22 fatty acids, optionally unsaturated and/or polyunsaturated fatty acids, emulsifiers, coemulsifiers, such as triceteareth-4-phosphate, followed by metering it with stirring to a phase II temperature-controlled at 75° C. obtained from an aqueous mixture containing moisturizers, such as propylene glycol and/or polyhydric alcohols, especially glycerol, emulsifiers, such as alkyl sarcosinates, and skin care additives, such as allantoin; wherein homogeneous mixing of phases I and II is provided and said metering is performed at a temperature of 75° C.; after the metered addition, the temperature is maintained at 75° C. for a period of between 5 and 20 minutes; whereupon the temperature of the thus obtained mixture is lowered to a temperature of between 30 and 40° C. with constant stirring; the pH value is adjusted to from 7.6 to 8.2, preferably with a skin-compatible basic organic compound, and the mixture obtained is filled into dosage forms with the addition of a propellant.

1 - 17 . (canceled) 
     
     
         18 . A foam aerosol Skin cream, wherein the skin cream does not contain PTFE, obtained by
 preparing a phase I by melting at 75° C. a mixture containing one or more C 10 -C 22  fatty acids, optionally containing an unsaturated or polyunsaturated fatly acid, an emulsifier, or a coemulsifier or a mixture thereof   preparing a phase II, temperature-controlled at 75° C., by aqueous admixture of urea, as a moisture-binding agent, and two or three ingredients selected from the group consisting of a moisturizer, an emulsifier, and a skin care additive, and a combination thereof;   metered addition with homogenous mixing of phase I and phase II at a temperature of 75° C.; followed by   maintaining the temperature of the homogeneous mixture at 75° C. for a period of between 5 and 20 minutes; followed by   lowering the temperature of the homogeneous mixture from 75° C. to a temperature between 30° C. and 40° C. with constant stirring; followed by   adjusting the pH of the homogeneous mixture at a temperature between 30° C. and 40° C. to a value of 7.6 to 8.2; followed by   combining the homogeneous mixture with a propellant in a dosage form, wherein the propellant is butane, propane, or a mixture thereof.   
     
     
         19 . The foam aerosol skin cream according to  claim 18 , wherein phase I flier contains as a coemulsifier triceteareth-4-phosphate. 
     
     
         20 . The foam aerosol skin cream according to  claim 18 , wherein the moisturizer in phase II is propylene glycol, a polyhydric alcohol, or a combination thereof. 
     
     
         21 . The foam aerosol skin cream according to  claim 18 , wherein the moisturizer in phase II is glycerol and the emulsifier in phase II is an alkyl sarcosinate. 
     
     
         22 . The foam aerosol skin cream according to  claim 18 , wherein the skin care additive in phase II is allantoin. 
     
     
         23 . The foam aerosol skin cream according to  claim 18 , wherein the pH is adjusted to a value from of 7.6 to 8.2 by adding a skin-compatible basic organic compound. 
     
     
         24 . The foam aerosol skin cream according to  claim 18 , her comprising adding a preservative to the homogeneous mixture, with stirring, at the temperature of 30° C. to 40° C. 
     
     
         25 . The foam aerosol skin cream according to  claim 18 , containing
 from 4 to 15% by weight of oil-in-water emulsifier;   from 1 to 10% by weight of the C 10 -C 22  fatty acid;   from 0.4 to 2.3% by weight of the coemulsifier;   from 1 to 20% urea;   from 1 to 10% by weight of the moisturizer;   from 0.5 to 1% by weight of the skin care additive; and   water as the balance to make 100% by weight.   
     
     
         26 . A process for making the foam aerosol skin cream comprising:
 preparing a phase I by melting at 75° C. a mixture containing one or more C 10 -C 22  fatty acids, optionally containing an unsaturated or polyunsaturated fatty acid, an emulsifier, or a coemulsifier or a mixture thereof;   preparing a phase II, temperature-controlled at 75° C., by aqueous admixture of urea, as a moisture-binding agent, and two or three ingredients selected from the group consisting of a moisturizer, an emulsifier, and a skin care additive, and a combination thereof;   metered addition with homogenous mixing of phase I and phase II at a temperature of 75° C.; followed by   maintaining the temperature of the homogeneous mixture at 75° C. for a period of between 5 and 20 minutes; followed by   lowering the temperature of the homogeneous mixture from 75° C. to a temperature between 30° C. and 40° C. with constant stirring; followed by   adjusting the pH of the homogeneous mixture at a temperature between 30° C. and 40° C. to a value of 7.6 to 8.2;   
       thereby producing a foam aerosol skin cream that does not contain PTFE. 
     
     
         27 . A foam aerosol skin cream made by the process comprising:
 preparing a phase I by melting at 75° C. a mixture containing one or more C 10 -C 22  fatty acids, optionally containing an unsaturated or polyunsaturated fatty acid, an emulsifier, or a coemulsifier or a mixture thereof;   preparing a phase II, temperature-controlled at 75° C., by aqueous admixture of urea, as a moisture-binding agent, and two or tree ingredients selected from the group consisting of a moisturizer, an emulsifier, and a skin care additive, and a combination thereof;   metered addition with homogenous mixing of phase I and phase II at a temperature of 75° C.; followed by   maintaining the temperature of the homogeneous mixture at 75° C. for a period of between 5 and 20 minutes; followed by   lowering the temperature of the homogeneous mixture from 75° C. to a temperature between 30° C. and 40° C. with constant stirring; followed by   adjusting the pH of the homogeneous mixture at a temperature between 30° C. and 40° C. to a value of 7.6 to 8.2;   
       thereby producing a foam aerosol skin cream that does not contain PTFE. 
     
     
         28 . A process of making a container of spray foam aerosol cream comprising filling the foam aerosol cream that does not contain PTFE of  claim 27  together with a propellant into a spray container, wherein the propellant is butane, propane, or a mixture thereof. 
     
     
         29 . An article comprising a spray-container containing the spray foam aerosol cream according to  claim 18 .