Melt-processible thermoplastic fluoropolymers having...

Details Melt-processible thermoplastic fluoropolymers having... Melt-processible thermoplastic fluoropolymers having...

2005-08-09

2005-08-09

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C524S544000, C525S199000

Reexamination Certificate

active

06927265

ABSTRACT:
The present invention provides a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C. The fluoropolymer is derived from (a) one or more gaseous fluorinated monomers, (b) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefin, (ii) olefins corresponding to formula (I):in-line-formulae description="In-line Formulae" end="lead"?Xa2C═CXa—Rf—Br  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein each Xaindependently represents hydrogen, fluorine, bromine, chlorine or iodine, Rfis a perfluoroalkylene group, typically having 1 to 8 carbon atoms, a perfluorooxyalkylene group or a perfluoropolyether group and (iii) mixtures thereof; and (c) optionally one or more comonomers selected from non-gaseous fluorinated monomers and non-fluorinated monomers. The resulting fluoropolymer has long chain branches. The invention further provides a method for making these polymers.

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