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US 9,434,837 B2Granted
Method of producing fluoropolymers using acid-functionalized monomers
AssigneeArkema Inc.
InventorsMehdi Durali, Lotfi Hedhli
Life of this patent
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Abstract
A fluoropolymer latex is obtained by emulsion polymerization of one or more fluoromonomers in the presence of one or more acid-functionalized monomers such as vinyl sulfonic acid or a salt thereof. A fluorosurfactant need not be present.
Claims13
A process for preparing a fluoropolymer in an aqueous reaction medium, comprising:
- a) forming an aqueous emulsion comprising at least one radical initiator, and monomers consisting of about 0.01 to about 1 weight percent of at least one acid-functionalized monomer or salt thereof, and one or more fluoromonomers, wherein said at least one fluoromonomer comprises vinylidene fluoride;
- and
- b) initiating polymerization of said acid-functionalized monomers and fluoromonomers, using a free-radical initiator to form a stable latex emulsion copolymer, wherein the process uses no fluorosurfactant.
Dependencies are inferred from the claim text.