Extrudable fluoropolymer blends
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United States of America Patent
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Sep 14, 2004
Grant Date -
Jul 24, 2003
app pub date -
Dec 11, 2001
filing date -
Dec 11, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a melt processable fluorothermoplastic composition comprising a major amount of a first semi-crystalline fluorinated copolymer and a minor amount of a second fluoropolymer effective to reduce melt defects in the composition. Each fluoropolymer is selected from four classes. The first class, (a), includes a semi-crystalline perfluorinated copolymer. The second class, (b), includes a fluoropolymer derived from interpolymerized units of at least one essentially perfluorinated monomer and at least one non-fluorinated hydrogen-containing monomer. The third class, (c), includes a fluoropolymer derived from interpolymerized units of at least one partially-fluorinated monomer, and optionally at least one essentially perfluorinated monomer. The second fluoropolymer is selected from a category other than the category in which the first fluoropolymer is selected. The minor component also can include interpolymerized units of a PAVE, and/or a PAOVE. A method of improving surface properties in a fluoropolymer extrudate is also provided.
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