Invention Grant
- Patent Title: Aqueous polymerization of fluorinated monomers using polymerization agent comprising fluoropolyether acid or salt and hydrocarbon surfactant
- Patent Title (中): 使用包含含氟聚醚酸或盐和烃表面活性剂的聚合剂进行氟化单体的水聚合
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Application No.: US11937536Application Date: 2007-11-09
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Publication No.: US07897682B2Publication Date: 2011-03-01
- Inventor: Paul Douglas Brothers , Subhash Vishnu Gangal
- Applicant: Paul Douglas Brothers , Subhash Vishnu Gangal
- Applicant Address: US DE Wilmington
- Assignee: E. I. du Pont de Nemours and Company
- Current Assignee: E. I. du Pont de Nemours and Company
- Current Assignee Address: US DE Wilmington
- Main IPC: C08K5/06
- IPC: C08K5/06
Abstract:
A process for polymerizing at least one fluorinated monomer in an aqueous medium in the presence of initiator and polymerization agent to form an aqueous dispersion of particles of fluoropolymer having a fluoropolymers solids content of at least about 10% by weight. The polymerization agent is a combination of fluoropolyether acid or salt thereof and hydrocarbon surfactant. The aqueous medium contains less than about 300 ppm of perfluoroalkane carboxylic acid or salt fluorosurfactants. The process is preferably performed without adding polymer seed prior to polymerization kick-off.
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