Fluoropolymer dispersion treatment employing ultraviolet light and oxygen source to reduce fluoropolymer resin discoloration
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul Douglas Brothers, Gregory Allen Chapman, Subhash Vishnu Gangal, Dipti Dilip Khasnis, Adam Paul Smith
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Abstract
Process for reducing thermally induced discoloration of fluoropolymer resin produced by polymerizing fluoromonomer in an aqueous dispersion medium to form aqueous fluoropolymer dispersion and isolating said fluoropolymer from said aqueous medium to obtain said fluoropolymer resin. The process comprises exposing the aqueous fluoropolymer dispersion to ultraviolet light in the presence of an oxygen source.
Claims11
Process for reducing thermally induced discoloration of fluoropolymer resin, said fluoropolymer resin produced by polymerizing fluoromonomer in an aqueous dispersion medium to form aqueous fluoropolymer dispersion and isolating said fluoropolymer from said aqueous medium to obtain said fluoropolymer resin, said process comprising:
- exposing the aqueous fluoropolymer dispersion to ultraviolet light in the presence of an oxygen source, wherein said aqueous fluoropolymer dispersion contains hydrocarbon surfactant which causes said thermally induced discoloration.
Dependencies are inferred from the claim text.