Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2008-07-25
2011-12-13
Mulcahy, Peter D. (Department: 1764)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C174S036000, C525S011000, C525S192000, C525S200000, C526S242000
Reexamination Certificate
active
08076431
ABSTRACT:
The present invention relates to a partially-crystalline copolymer comprising tetrafluoroethylene, hexafluoropropylene in an amount corresponding to hexafluoropropylene index (HFPI) of from about 2.8 to 5.3, and preferably from about 0.2% to 3% by weight of perfluoro(alkyl vinyl ether), said copolymer having less than about 50 ppm alkali metal ion, having a melt flow rate of within the range of about 30±3 g/10 min, and having no more than about 50 unstable endgroups/106carbon atoms and which can be extruded at high speed onto conductor over a broad polymer melt temperature range to give insulated wire of high quality.
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Earnest, Jr. Thomas Robert
Favereau Daniel A.
McKee Niall D.
Tooley Patricia A.
E.I. du Pont de Nemours and Company
Hu Henry
Mulcahy Peter D.
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