Functional fluoropolymers
AssigneeArkema Inc.
InventorsJames T. Goldbach, Wengsheng He, Andrew Kahn
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Abstract
The invention relates to novel linear, semi-crystalline, functional fluoropolymers that have been obtained by copolymerizing a fluorinated vinylic monomer and a hydrophilic (meth)acrylic comonomer bearing a halogen functionality.
Claims15
A battery electrode comprising a fluorinated copolymer wherein the monomers units of the fluorinated copolymer consist of units based on vinylidene fluoride and units based on a halogenated monomer (1):
- wherein:
- R1, R2, and R3 is hydrogen or halogen, and at least one of R1, R2, and R3 is halogen;
- and
- R4 is a fluorinated oligomer of hexafluoropropylene oxide;
- an alkali metal;
- or an ammonium, alkylammonium, or alkylarylammonium ion.
A battery electrode slurry formulation comprising a fluorinated copolymer in a solvent, wherein the monomer units of the fluorinated copolymer consist of units based on vinylidene fluoride and units based on a halogenated monomer (1):
- wherein:
- R1, R2, and R3 is hydrogen or halogen, and at least one of R1, R2, and R3 is halogen;
- and R4 is a fluorinated oligomer of hexafluoropropylene oxide;
- an alkali metal;
- or an ammonium, alkylammonium, or alkylarylammonium ion.
A process for preparing a fluorinated copolymer wherein the monomer units of the fluorinated copolymer consist of units based on vinylidene fluoride and units based on a halogenated monomer (1):
- wherein:
- R1, R2, and R3 is hydrogen or halogen, and at least one of R1, R2, and R3 is halogen;
- and R4 is a fluorinated oligomer of hexafluoropropylene oxide;
- an alkali metal;
- or an ammonium, alkylammonium, or alkylarylammonium ion,
- in an aqueous reaction medium, comprising:
- a) forming an aqueous emulsion comprising at least one initiator, a stabilizer, vinylidene fluoride monomer, and halogenated monomer (1),
- b) initiating copolymerization of the vinylidene fluoride with said halogenated monomer (1) with stirring, under heat and super-atmospheric pressure, wherein no fluorinated surfactant is used in the process.
Dependencies are inferred from the claim text.