Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-08-16
2008-10-14
Mulcahy, Peter D. (Department: 1796)
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
07435786
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 being polymerized and isolated in the absence of added alkali metal salts, 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 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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George Odian, Principles of Polymerization, (1991), p. 241, Third Edition, John Wiley & Sons, Inc., New York.
Earnest, Jr. Thomas Robert
Favereau Daniel N.
McKee Niall D.
Tooley Patricia A.
E.I. du Pont de Nemours and Company
Hu Henry
Mulcahy Peter D.
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