Process for producing fluoropolymers
First Claim
1. An emulsion polymerization process for the production of fluoropolymers, said process comprising polymerizing at least one fluoromonomer in an aqueous medium comprising initiator and dispersing agent to obtain an aqueous dispersion of fluoropolymer, wherein said dispersing agent is a combination of at least two fluorosurfactants, at least one of said fluorosurfactants is perfluoroaliphatic sulfinate, and at least one of said fluorosurfactants is a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, carboxylic acid salt, sulfonic acid and sulfonic acid salt.
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Abstract
An emulsion polymerization process for the production of fluoropolymers is disclosed wherein a combination of at least two fluorosurfactants is employed as dispersants. At least one fluorosurfactant is a perfluoroalkyl or perfluoroalkoxy sulfinate. At least one other fluorosurfactant is a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a slat thereof, sulfonic acid and a salt thereof.
11 Citations
16 Claims
- 1. An emulsion polymerization process for the production of fluoropolymers, said process comprising polymerizing at least one fluoromonomer in an aqueous medium comprising initiator and dispersing agent to obtain an aqueous dispersion of fluoropolymer, wherein said dispersing agent is a combination of at least two fluorosurfactants, at least one of said fluorosurfactants is perfluoroaliphatic sulfinate, and at least one of said fluorosurfactants is a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, carboxylic acid salt, sulfonic acid and sulfonic acid salt.
Specification