Invention Grant
- Patent Title: Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant
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Application No.: US15342189Application Date: 2016-11-03
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Publication No.: US10703829B2Publication Date: 2020-07-07
- Inventor: Paul Douglas Brothers , Subhash Vishnu Gangal , Dipti Dilip Khasnis
- Applicant: THE CHEMOURS COMPANY FC, LLC
- Applicant Address: US DE Wilmington
- Assignee: THE CHEMOURS COMPANY FC, LLC
- Current Assignee: THE CHEMOURS COMPANY FC, LLC
- Current Assignee Address: US DE Wilmington
- Main IPC: C08F2/16
- IPC: C08F2/16 ; C08F14/18 ; C08F14/26 ; C08K5/41 ; C09D127/18

Abstract:
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.
Public/Granted literature
- US20170073435A1 AQUEOUS POLYMERIZATION OF PERFLUOROMONOMER USING HYDROCARBON SURFACTANT Public/Granted day:2017-03-16
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