Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2010-07-06
2011-10-11
Lipman, Bernard (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S326400, C525S343000, C525S355000, C525S356000
Reexamination Certificate
active
08034880
ABSTRACT:
The present invention provides a novel production process by which unstable terminal groups can be sufficiently stabilized under mild conditions. The present invention is related to a method for producing an —SO3H group-containing fluoropolymer wherein a fluoropolymer to be treated having a —SO2X group-containing monomer unit (X representing F or Cl) is subjected to a procedure comprising at least the steps A, B and C defined below in that order:A: Step of reacting with a halogenating agent;B: Step of reacting with a decomposition treatment agent;C: Step of reacting with a fluorinating agent.
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Ikeda Masanori
Ino Tadashi
Isaka Tadaharu
Koga Takehiro
Kondo Masahiro
Asahi Kasei E-Materials Corporation
Daikin Industries Ltd.
Lipman Bernard
Sughrue & Mion, PLLC
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