Patent ID: 6960642

Claim:
A fluorochemical composition comprising at least one fluorine-containing, aromatic ester compound or oligomer represented by one of the following formulas: R 1 —O—(C═O)-A-(C═O)—O—[R 2 —O—(C═O)-A-(C═O)—O] n—R 1 (I) R 1 —O—(C═O)—R 2 —(C═O)—O—[A-O—(C═O)—R 2 —(C═O)—O] n—R 1 (II) R 1 —(C═O)—O-A-O—(C═O)—[R 2 —(C═O)—O-A-O—(C═O)] n—R 1 (III) R 1 —(C═O)—O—R 2 —O—(C═O)-[A-(C═O)—O—R 2 —O—(C═O)] n—R 1 (IV) wherein R 1 is the residue of at least one fluorine-containing, sulfonamido-group-containing monoalcohol, fluorine-containing, sulfonamido-group-containing monocarboxylic acid, or fluorine-containing, sulfonamido-group-containing monocarboxylic acid derivative; A and R 2 independently comprise at least one aliphatic, heteroaliphatic, saturated alicyclic, saturated heteroalicyclic, aromatic, heteroaromatic, or polymeric moiety; and n is 2-20; with the proviso that A and/or R 2 comprises an aromatic or heteroaromatic moiety that is directly ring-bonded to the adjacent ester groups shown in Formulas I-IV.