NEW SUNSCREEN COMPOUNDS AND COMPOSITIONS CONTAINING SAME AND METHODS FOR USE THEREOF

摘要

There is provided a photostable and synergistically enhanced topical sunscreen composition that provides increased substantivity, waterproofness, sweat resistance and rub off resistance. There is further provided methods of enhancing the photostability of a sunscreen active in a topical sunscreen composition, synergistically enhancing the W absorbance of a topical sunscreen composition having a sunscreen active, and enhancing the substantivity, waterproofness, sweat resistance and rub off resistance in a topical sunscreen composition. The preferred compositions and methods have a sunscreen active, a cosmetically acceptable vehicle, and novel 2­ substituted-3,3-diaryl-2-propenoic acid derivatives with [A] a C16 to C50 straight or branched chain, substituted or un-substituted, conjugated or non­ conjugated hydrocarbon, or [B] a siloxane, polysiloxane, organo-modified polysiloxane residue, a group represented by the formula R10 [Si (R<10>) 2] n- and R<11> which is a silicone residue derived from a silicone represented by the formula R<11>0H having a molecular weight up to about 30,000, wherein each R<10> is independently selected from the group consisting of alkyl, alkoxy, aryl and aryloxy and n is from (1) to about (500).