Method for producing melt-processable fluororesin

Details Method for producing melt-processable fluororesin Method for producing melt-processable fluororesin

2008-04-17

2010-12-21

Wu, David (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C524S545000, C524S546000, C524S777000, C526S209000, C526S214000, C526S244000, C526S249000, C526S250000

Reexamination Certificate

active

07855259

ABSTRACT:
To provide a method for producing a melt-processable fluororesin, which is capable of increasing the molecular weight of the fluororesin and preventing coloration of the fluororesin, by using a specific fluorinated emulsifier other than ammonium perfluorooctanoate. A method for producing a melt-processable fluororesin which is characterized in that a fluorinated monomer is emulsion-polymerized in an aqueous medium containing a fluorinated emulsifier of a formula (I)XCF2CF2(O)mCF2CF2OCF2COOA wherein X is a hydrogen atom or a fluorine atom, A is a hydrogen atom, an alkali metal or NH4, and m is an integer of 0 or 1.

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