Aqueous polymerization of fluorinated monomers using...

Details Aqueous polymerization of fluorinated monomers using... Aqueous polymerization of fluorinated monomers using...

2011-07-12

2011-07-12

Egwim, Kelechi C (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S206000, C526S209000, C526S214000, C526S242000

Reexamination Certificate

active

07977438

ABSTRACT:
A process for polymerizing at least one fluorinated monomer in an aqueous polymerization medium in the presence of initiator and polymerization agent to form an aqueous dispersion of particles of fluoropolymer having a fluoropolymers solids content of at least about 10% by weight. The polymerization agent is a combination of fluoropolyether acid or salt thereof and siloxane surfactant. The aqueous polymerization medium contains less than about 300 ppm of perfluoroalkane carboxylic acid or salt fluorosurfactants.

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