Synthesis and characterization of novel functional fluoropolymers
OwnerBilal Baradie, Molly Shoichetinventors
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Abstract
Functional fluoropolymers of a fluorocarbon, interlinker and siloxane monomers have been synthesized by free radical polymerization in supercritical fluid carbon dioxide wherein the interlinker monomer is necessary for the copolymerization of the fluoromonomer and the siloxane monomer. Furthermore, the addition of a crosslinking agent to the functional fluoropolymer produces a highly thermally stable and elastic film wherein the film properties can be controlled for specific applications such as coatings, including in paints, and biomedical devices.
Claims51
A functional fluoropolymer comprising a fluorocarbon backbone portion including at least one fluorocarbon repeat unit, a siloxane polymer portion including at least one siloxane repeat unit, and an interlinker polymer portion including at least one interlinker repeat unit, the interlinker polymer portion being covalently bound to both the fluorocarbon backbone portion and the siloxane polymer portion.
A method of synthesizing a functional fluoropolymer, comprising the steps of:
- a) providing a reaction mixture comprising fluorocarbon monomer repeat units, inter-linker monomer repeat units and siloxane monomer repeat units, and a polymerization initiator in a polymerization medium including carbon dioxide;
- and
- b) polymerizing said fluorocarbon monomer repeat units with said interlinker monomer repeat units and said siloxane monomer repeat units wherein the inter-linker monomer repeat units function to copolymerize the siloxane monomer repeat units with the fluorocarbon monomer repeat units to form a functional fluoropolymer comprising a fluorocarbon backbone portion including at least one fluorocarbon repeat unit, a siloxane polymer portion including at least one siloxane repeat unit, and an interlinker polymer portion including at least one interlinker repeat unit, the interlinker polymer portion being covalently bound to both the fluorocarbon backbone portion and the siloxane polymer portion.
A functional fluoropolymer film comprising a fluorocarbon polymer backbone portion including at least one fluorocarbon monomer repeat unit, an interlinker polymer portion including at least one interlinker monomer repeat unit, and a siloxane polymer portion including at least one siloxane monomer repeat unit, and a crosslinking agent, wherein the fluorocarbon backbone portion is covalently bound to the interlinker polymer portion and the siloxane polymer portion is covalently bound to the interlinker polymer portion.
Dependencies are inferred from the claim text.