Patent ID: 7045571

Claim:
A method comprising adding at least 1000 ppm a fluorinated surfactant being substantially free of micro-emulsion and having a molecular weight of at least 1000 g/mol and having the formula: MOOC-Q 1 -O—(CF 2 O) k (CF 2 CF 2 O) p (CF(CF 3 )CF 2 O) q -Q 2 -COOZ wherein k, p, and q each represent a value of 0 to 15, M and Z each represent hydrogen or a cation, and Q 1 and Q 2 each independently represent —CF 2 — or —CF(CF 3 )—, to an emulsion polymerization process, wherein the emulsion polymerization process is substantially free of perfluoroalkyl carboxylic acids.