Fluorinated surfactants for use in making a fluoropolymer

Details Fluorinated surfactants for use in making a fluoropolymer Fluorinated surfactants for use in making a fluoropolymer

2006-11-21

2010-02-09

Zimmer, Marc S (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S284000, C524S544000, C524S545000, C524S546000, C524S805000, C526S242000, C554S220000, C554S225000, C562S045000, C562S076000

Reexamination Certificate

active

07659333

ABSTRACT:
The present invention provides a fluorinated surfactant having the general formula:in-line-formulae description="In-line Formulae" end="lead"?[Rf—(O)t—CQH—CF2—O]n—R—G  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein Rfrepresents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, Q is CF3or F, R is an aliphatic or aromatic hydrocarbon group, G represents a carboxylic or sulphonic acid or salt thereof, t is 0 or 1 and n is 1, 2 or 3. The surfactant is particularly useful in polymerizing fluorinated monomers in an aqueous emulsion polymerization.

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