Patent Number: 6,165,449

Title: Methods and compositions for improving sun protection from sunscreen formulations

Abstract: Disclosed are methods and compositions for increasing the sun protection factor of oil and water sunscreen emulsions comprising adding a phthalic acid derivative to an oil and water sunscreen emulsion in an amount effective to increase the sun protection factor of the emulsion, the phthalic acid derivative having the general formula: ##STR1## where R represents an organic substituent, X represents a cation; and m is an integer satisfying the valency of X.

Inventors: George; Liliana (Wilmette, IL), Sottery; John (Milford, CT)

Assignee: Stepan Company

International Classification: A61K 8/30 (20060101); A61K 8/42 (20060101); A61Q 17/04 (20060101); A61K 007/42 (); A61K 007/44 (); A61K 007/00 ()

Expiration Date: 12/26/2013