Invention Grant
US08436054B2 Fluorinated ionomer produced by aqueous polymerization using dispersed particulate of fluorinated ionomer produced in situ
失效
通过水分聚合制备的氟化离聚物，使用原位产生的氟化离聚物的分散颗粒
- Patent Title: Fluorinated ionomer produced by aqueous polymerization using dispersed particulate of fluorinated ionomer produced in situ
- Patent Title (中): 通过水分聚合制备的氟化离聚物，使用原位产生的氟化离聚物的分散颗粒
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Application No.: US12641393Application Date: 2009-12-18
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Publication No.: US08436054B2Publication Date: 2013-05-07
- Inventor: Ralph Munson Aten , Kenneth Wayne Leffew , Ralph Birchard Lloyd , Charles Joseph Noelke
- Applicant: Ralph Munson Aten , Kenneth Wayne Leffew , Ralph Birchard Lloyd , Charles Joseph Noelke
- 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: C08F2/16
- IPC: C08F2/16
Abstract:
A process for making an aqueous dispersion of fluorinated ionomer particles by polymerizing in a first polymerization step at least one fluorinated monomer having an ionic group in an aqueous polymerization medium in the presence of initiator, the polymerizing providing dispersed particulate of fluorinated ionomer, polymerizing in a second polymerization step at least one fluorinated monomer having an ionic group in the aqueous polymerization medium in the presence of the dispersed particulate of fluorinated ionomer and initiator to form the aqueous dispersion of particles of fluorinated ionomer, and suspending the first polymerization step prior to beginning the second polymerization step.
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