High melting PFTE polymers for melt-processing
Assignee3M Innovative Properties Company
InventorsKlaus Hintzer, Harald Kaspar, Ludwig Mayer, Tilman C. Zipplies
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Abstract
Provided are a tetrafluoroethylene copolymers having a melting point of at least 317° C., a melt flow index (MFI) at 372° C. and a 5 kg load (MFI 372/5) of from about 0.60 g/10 min up to about 15 g/10 min. Also provided are methods of forming a shaped article using the copolymers described above, shaped articles made with those copolymers and compositions containing such copolymers.
Claims10
A perfluorinated tetrafluoroethylene copolymer comprising repeating units derived from tetrafluoroethylene (TFE) and having a melting point of at least 317° C., a melt flow index (MFI) at 372° C. and a 5 kg load (MFI 372/5) of from about 0.60 g/10 min up to about 15 g/10 min, wherein the copolymer contains up to 1.4% by weight of comonomers other than TFE and wherein the copolymer comprises from 0.12 to 1.40% by weight, based on the total weight of the copolymer, of units derived from one or more perfluorinated alkyl allyl ether wherein the alkyl group of the perfluorinated alkyl allyl ether is interrupted by at least one oxygen atom.
Dependencies are inferred from the claim text.