Functional fluoropolymers

Patent metadata

Field	Value
Publication number	US-12209152-B2
Application number	US-201917045274-A
Country	US
Kind code	B2
Filing date	Apr 9, 2019
Priority date	Apr 10, 2018
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

The invention relates to novel linear, semi-crystalline, functional fluoropolymers that have been obtained by copolymerizing a fluorinated vinylic monomer and a hydrophilic monomer chosen from vinyl alkyl acids, vinyl phosphonates, functional acrylamides, carbonates, vinyl ethers, alkoxy compounds, and double hydrophilic group monomers.

First claim

What is claimed is:

1. A fluorinated copolymer comprising copolymerized monomers wherein the monomers consist of vinylidene fluoride and one or more hydrophilic monomers wherein the hydrophilic monomer comprises vinyl alkyl acids, wherein said hydrophilic monomer has the formula (M1):

wherein R 1 , R 2 , and R 3 is a hydrogen or a halogen;

wherein R 4 is a C 8 linear or branched alkyl group, and
wherein R 5 is carboxylic acid (C(O)OH), alkali metal carboxylate salt (COO − M + ), ammonium carboxylate salt (COO−NH 4 + ), alkylammonium carboxylate salt (COO − N(Alk) 4 + ), sulfonic acid (S(O)(O)OH), alkali metal sulfonate salt (S(O)(O)O − M + ), ammonium sulfonate salt (S(O)(O)O − NH 4 + ), alkylammonium sulfonate salt (S(O)(O)O − N(Alk) 4 + ), wherein M + is an alkali metal and Alk means alkyl group,
and wherein the fluorinated copolymer comprises from 90 to 99.99 wt % of polymerized vinylidene fluoride monomer units.

2. The fluorinated copolymer of claim 1 comprising greater than 0 wt % and up to 10.0 wt % of said hydrophilic monomers.

3. The fluorinated copolymer of claim 1 , wherein at least one of said hydrophilic monomers comprise at least one halogen on the vinylic carbon.

4. The fluorinated copolymer of claim 3 , wherein said at least one halogen comprises fluorine.

5. A formulation comprising the fluorinated copolymer of claim 1 , in a solvent.

6. The formulation of claim 5 , wherein said solvent is selected from the group consisting of n-methylpyrrolidone (NMP), dimethylsulfoxide (DMSO), N,N-dimethylformamide (DMF), triethylphosphite (TEP), acetone, tetrahydrofuran, methyl ethylketone (MEK), methyl isobutyl ketone (MiBK), ethyl acetate (EA), butyl acetate (BA), dimethyl carbonate (DMC), diethyl carbonate (DEC) and methyl ethyl carbonate (MEC).

7. The formulation of claim 5 further comprising activated carbon and metal particles in suspension in said solvent, said metal particles being selected from the group consisting of lithium iron phosphate (LFP), lithium nickel manganese cobalt oxide (NMC), lithium-manganese-cobalt-oxide, lithium-nickel-cobalt-aluminum oxide, lithium-manganese oxide, and lithium-nickel-manganese oxide (LMNO).

8. A process for preparing the fluorinated copolymer of claim 1 in an aqueous reaction medium, comprising:
a) forming an aqueous reaction medium comprising, a stabilizer, vinylidene fluoride, and at least one hydrophilic monomers having the formula (M1),
b) initiating copolymerization of said vinylidene fluoride with said hydrophilic monomer, by introducing at least one initiator, and conducting the copolymerization with stirring, under heat and super-atmospheric pressure.

9. The process of claim 8 , wherein the initiator is a persulfate or an organic peroxide.

10. A battery comprising the fluorinated copolymer of claim 1 .

11. A coated substrate on which the fluorinated copolymer of claim 1 is applied as a latex in water or as a solvent solution.

12. A porous membrane comprising the copolymer of claim 1 applied as a latex in water or as a solvent solution.

Assignees

• Arkema Inc

Inventors

• Goldbach James T
• Bonnet Anthony
• Lin Caiping
• He Wengsheng
• Pastore Katharine S
• Coffey James F
• Nhia Xiong Pa
• Kahn Andrew

Classifications

• B01D71/401

  Polymers based on the polymerisation of acrylic acid, e.g. polyacrylate · CPC title

• B01D71/403

  Polymers based on the polymerisation of maleic acid or derivatives thereof · CPC title

• B01D71/402

  Polymers based on the polymerisation of fumaric acid or derivatives thereof · CPC title

• B01D71/382

  Polyvinylethers · CPC title

• C08F214/22 Primary

  Vinylidene fluoride · CPC title