Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant

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United States of America Patent

PATENT NO 11655312
APP PUB NO 20200291141A1
SERIAL NO

16888938

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Abstract

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A process is provided for the polymerization of fluoromonomer to an dispersion of fluoropolymer particles in an aqueous medium in a polymerization reactor, by (a) providing the aqueous medium in the reactor, (b) adding the fluoromonomer to the reactor, (c) adding initiator to the aqueous medium, the combination of steps (b) and (c) being carried out essentially free of hydrocarbon-containing surfactant and resulting in the kickoff of the polymerization of the fluoromonomer, and (d) metering hydrocarbon-containing surfactant into the aqueous medium after the kickoff of polymerization, e.g. after the concentration of the fluoropolymer in the aqueous medium is at least 0.6 wt %, the metering being at a rate reducing the telogenic activity of said surfactant while maintaining surface activity.

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Patent Owner(s)

Patent OwnerAddress
THE CHEMOURS COMPANY FC LLCWILMINGTON DE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brothers, Paul Douglas Chadds Ford, US 63 533
Gangal, Subhash Vishnu Hockessin, US 40 167
Khasnis, Dipti Dilip Wilmington, US 19 93

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