- 专利标题: AQUEOUS POLYMERIZATION OF PERFLUOROMONOMER USING HYDROCARBON SURFACTANT
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申请号: US16888938申请日: 2020-06-01
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公开(公告)号: US20200291141A1公开(公告)日: 2020-09-17
- 发明人: PAUL DOUGLAS BROTHERS , SUBHASH VISHNU GANGAL , DIPTI DILIP KHASNIS
- 申请人: THE CHEMOURS COMPANY FC, LLC
- 申请人地址: US DE WILMINGTON
- 专利权人: THE CHEMOURS COMPANY FC, LLC
- 当前专利权人: THE CHEMOURS COMPANY FC, LLC
- 当前专利权人地址: US DE WILMINGTON
- 主分类号: C08F2/16
- IPC分类号: C08F2/16 ; C08F14/26 ; C09D127/18 ; C08F14/18 ; C08K5/41
摘要:
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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