Sunscreening method and composition containing film forming polyamide material

• US 3,895,104 A
• Filed: 06/13/1972
• Issued: 07/15/1975
• Est. Priority Date: 06/13/1972
• Status: Expired due to Term

• Current Assignee: Gerhart Karg
• Original Assignee: Gerhart Karg
• Inventors: Karg, Gerhart
• Primary Examiner(s): Meyers, Albert T.
• Assistant Examiner(s): Ore, Dale R.
• Application Number:
  US05/262,375
• Time in Patent Office: 1,127 Days
• Field of Search: 424/59,60,78A 260/78A
• US Class Current: 424/59
• CPC Class Codes: A61K 8/0208 Tissues; Wipes; Patches
• CPC Class Codes: A61K 8/88 Polyamides
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations

Abstract

Sunscreening compositions and methods of using the same to protect human skin from erythema-causing radiation by applying to the skin compositions containing a cosmetic carrier, at least one ultraviolet absorbing material which has a maximum absorption peak between 280 millimicrons to about 320 millimicrons and a polyamide resinous material which is capable of forming a film and is alcohol-soluble. Sunscreening compositions containing the polyamide resinous materials, when applied to the skin, form a long lasting protective film which resists removal by water and perspiration.

Claims

1. A method of protecting human skin from erythema-causing radiation comprising applying to the skin a sunscreening composition containing from about 0.1 to about 10 percent of the composition of at least one ultraviolet absorbing material having a maximum absorption peak between about 280 millimicrons and 320 millimicrons and from about 0.1 to about 50 percent of the composition of a water-insoluble, alcohol-soluble, film-forming polyamide material, said materials being incorporated in from about 40 percent to 99.8 percent of the composition of a cosmetic carrier material selected from the group consisting of C1-C5 alcohol, C1-C5 alcohol mixtures and C1-C5 alcohol-water mixtures, said maximum amount of water present in the alcohol-water mixture being dependent upon the compatibility of the polyamide used;

and allowing said composition to form a film on the skin.

2. The method of protecting human skin from erythema-causing radiation according to claim 1 wherein the polyamide material is a water insoluble, alcohol soluble, film forming polyacrylamide.

3. The method of protecting human skin from erythema-causing radiation according to claim 1 wherein the polyamide material is a water-insoluble, alcohol soluble, film forming condensation product of at least one polycarboxylic acid and at least one polyamine.

4. The method of protecting human skin from erythema-causing radiation according to claim 1 wherein the cosmetic carrier is a fugitive C1-C5 alcohol-aqueous mixture having the alcoholic content of said mixture in amounts of at least 50 percent.

5. A SUBSTANTIVE COMPOSITION FOR PROTECTING SKIN FROM ERYTHEMA-CAUSING RADIATION COMPRISING FROM ABOUT 0.1 TO ABOUT 10 PERCENT BY WEIGHT OF AN ULTRAVIOLET ABSORBING MATERIAL HAVING A MAXIUM ABSORPTION PEAK BETWEEN ABOUT 280 MILIMICRONS AND 320 MILIMICRONS AND FROM 0.1 TO 50 PERCENT BASED ON THE TOTAL WEIGHT OF THE COMPOSITION OF A POLYAMIDE RESINOUS MATERIAL WHICH IS WATER-INSOLUBLE, ALCOHOL SOLUBLE AND CAPABLE OF FORMING A SUBSTANTIVE FILM MATERIAL, SAID MATERIALS BEING INCORPORATED IN FROM ABOUT 40 TO 99.8 PERCENT BY WEIGHT OF A COSMETIC CARRIER SELECTED FROM THE GROUP CONSISTING OF C1-C5 ALCOHOL, C1-C5 ALCOHOL MIXTURES AND C1-C5 ALCOHOLWATER MIXTURES, SAID MAXIMUM AMOUNT OF WATER PRESENT IN THE ALCOHOL-WATER MIXTURES BEING DEPENDENT UPON THE COMPATIBILITY OF THE POLYAMIDE USED.

6. The substantive composition according to claim 5 wherein the polyamide resinous material is a condensation product of at least one polycarboxylic acid and at least one polyamine.

7. The substantive composition according to claim 5 wherein the polyamide resinous material is a polyacrylamide.

8. A substantive composition according to claim 5 wherein the cosmetic carrier is a C1-C5 alcohol-water mixture having an alcohol content of said mixture in amounts of at least 50 percent.