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US 7,160,623 B2Granted
Melt-processible poly(tetrafluoroethylene)
AssigneeEidgenossische Technische Hochschule Zurich
InventorsPaul Smith, Jeroen Visjager, Cees Bastiaansen, Theodorus Tervoort
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Abstract
Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described.
Claims31
A method for producing an article comprising:
- (i) heating a composition consisting of
- (a) a poly(tetrafluoroethylene) polymer, and
- (b) optionally, one or more additives, selected from the group consisting of colorants, fillers, reinforcing matter, electrically conducting matter, plasticizers, lubricants, processing aids, blowing agents, and foaming agents, to above the crystalline melting temperature of said polymer;
- and
- (ii) injection molding said composition;
- wherein said polymer has a peak melting temperature that exceeds about 320° C.
3 more elements
A method for producing an article comprising:
- (i) heating a composition consisting of
- (a) a poly(tetrafluoroethylene) polymer, and
- (b) optionally, one or more additives, selected from the group consisting of colorants, fillers, reinforcing matter, electrically conducting matter, plasticizers, lubricants, processing aids, blowing agents, and foaming agents, to above the crystalline melting temperature of said polymer;
- and
- (ii) melt-extruding, injection molding, and/or melt-spinning said composition;
- wherein said polymer has a crystalline melting temperature in the range of 310 to 335° C. and a co-monomer content of less than 1 mol %, and wherein all said co-monomer consists essentially of co-monomer selected from the group consisting of hexafluoropropylene and perfluoro(alkyl vinylether).
3 more elements
A method for producing an article comprising:
- (i) heating a composition consisting of
- (a) a poly(tetrafluoroethylene) polymer, and
- (b) optionally, one or more additives, selected from the group consisting of colorants, fillers, reinforcing matter, electrically conducting matter, plasticizers, lubricants, processing aids, blowing agents, and foaming agents, to above the crystalline melting temperature of said polymer;
- and
- (ii) melt spinning said composition;
- wherein said polymer has a peak melting temperature that exceeds about 320° C.
3 more elements
Dependencies are inferred from the claim text.