Fluoropolymer compositions, coated articles, and method of making the same
Assignee3M Innovative Properties Company
InventorsBlake Chandler, Thomas Blong, Dale Hutchens
Life of this patent
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Abstract
A fluoropolymer composition comprising a fluoropolymer with a particle size distribution having a ratio of the mode to D95 of 0.75 or greater and wherein when the fluoropolymer is a copolymer consisting of interpolymerized units derived from tetrafluoroethylene and perfluoro(propyl vinyl) ether, the fluoropolymer has less than 60 unstable endgroups per million carbon atoms; coated articles comprising the fluoropolymer; and methods for making the same.
Claims20
A method for making a fluoropolymer powder comprising classifying a first fluoropolymer to give a second fluoropolymer with a fluoropolymer particle size distribution having a ratio of the mode to D95 of 0.75 or greater, wherein the method further includes reducing the number of endgroups of the fluoropolymer to less than 60 unstable endgroups per million carbon atoms when the fluoropolymer is a copolymer consisting of interpolymerized units derived from tetrafluoroethylene and perfluoro(propyl vinyl) ether.
A composition comprising a fluoropolymer with a particle size distribution having a ratio of the mode to D95 of 0.75 or greater, wherein the fluoropolymer has less than 60 unstable endgroups per million carbon atoms when the fluoropolymer is a copolymer consisting of interpolymerized units derived from tetrafluoroethylene and perfluoro(propyl vinyl) ether.
A composition comprising a fluoropolymer having:
- a mode of 30 to 70 microns;
- and
- being substantially free of particles larger than about 75 microns;
- wherein the fluoropolymer has less than 60 unstable endgroups per million carbon atoms when the fluoropolymer is a copolymer consisting of interpolymerized units derived from tetrafluoroethylene and perfluoro(propyl vinyl) ether.
Dependencies are inferred from the claim text.