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US 6,310,141 B1Granted
Fluoropolymer-containing compositions
AssigneeDyneon LLC
InventorsLisa P. Chen, Harald Kaspar, Klaus Hintzer, Robert E. Kolb, Albert Killich
Life of this patent
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Abstract
Cured, latex-blended compositions featuring a fluoroelastomer and a fluoroplastic, and curable core-shell polymers having a fluoroelastomer precursor-containing shell and a fluoroplastic-containing core.
Claims24
A cured, latex-blended composition comprising:
- (a) a fluoroelastomer comprising the reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, and perfluorovinyl ethers;
- and
- (b) a fluoroplastic having a melting point of at least 100° C., said fluoroplastic comprising the reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, ethylene, and perfluorovinyl ethers,
- wherein said fluoroelastomer forms a continuous phase.
1 more element
A cured blend comprising:
- (a) a fluoroelastomer comprising the uncured reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, and perfluorovinyl ethers;
- and
- (b) a fluoroplastic having a melting point of at least 100° C.,
- said fluoroplastic comprising the reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, ethylene, and perfluorovinyl ethers,
- wherein at least one of the monomers reacted to form said fluoroelastomer precursor, said fluoroplastic, or both, is a perfluorovinyl ether in an amount between 0.1 and 10% by weight,
- wherein said fluoroelastomer forms a continuous phase.
3 more elements
Acore-shell polymer comprising:
- (a) a shell comprising a fluoroelastomer precursor having a melting point less than 100° C.,
- said fluoroelastomer precursor comprising the uncured reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, and perfluorovinyl ethers;
- and
- (b) a core comprising a fluoroplastic having a melting point of at least 100° C.,
- said fluoroplastic comprising the reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, ethylene, and perfluorovinyl ethers,
- with the proviso that when one of the monomers forming said fluoroplastic is tetrafluoroethylene or vinylidene fluoride, said fluoroplastic comprises the reaction product of tetrafluoroethylene or vinylidene fluoride and greater than 3% by weight of a co-monomer selected from the group consisting of hexafluoropropylene, ethylene, and perfluorovinyl ethers.
3 more elements
A method of preparing a cured composition comprising:
- (a) providing a first latex comprising a fluoroelastomer precursor having a melting point less than 110° C.,
- said fluoroelastomer precursor comprising the uncured reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, and perfluorovinyl ethers;
- (b) providing a second latex comprising a fluoroplastic having a melting point of at least 110° C.,
- said fluoroplastic comprising the reaction product of two or more monomers selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene, ethylene, and perfluorovinyl ethers;
- (c) combining said first latex and said second latex together to form a blend;
- (d) coagulating said blend;
- and
- (e) curing said blend.
5 more elements
Dependencies are inferred from the claim text.