# US 9,518,155 B2 · Fluoropolymer compositions

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- Number: US 9,518,155 B2
- Document ID: US9518155B2
- Status: Granted
- Kind: B2
- Application number: 14/394,271
- Filed: 2012-04-16
- Published: 2015-03-26
- Granted: 2016-12-13
- Earliest claimed: 2012-04-16
- Assignees: Rhodia Operations
- Applicants: Shujing Cheng; Arnaud Bourdette
- Inventors: Shujing Cheng; Arnaud Bourdette
- Web page: https://patentgrep.com/patent/US9518155B2

## CPC

- C08J 3/096: {Nitrogen containing compounds}
- C08J 3/095: {Oxygen containing compounds}
- C08J 3/097: {Sulfur containing compounds}
- C08J 11/06: without chemical reactions
- C08K 5/20: Carboxylic acid amides
- C08K 5/41: Compounds containing sulfur bound to oxygen
- C09D 7/20: Diluents or solvents
- C09D 127/16: Homopolymers or copolymers of vinylidene fluoride
- H01M 4/623: {fluorinated polymers}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- C08J 2327/12: containing fluorine atoms
- C08J 2327/16: Homopolymers or copolymers of vinylidene fluoride
- Y02E 60/10: Energy storage using batteries
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention relates to a composition for solubilizing a fluoropolymer, comprising a solvent blend of a) compound of formula (I) R1—C(═O)—NR2R3 wherein R1 and R2 and R3 are defined as in the specification and b) dimethylsulfoxide (DMSO). The invention also relates to the process for the preparation of the composition and its uses. The invention is also the use of the fluoropolymer composition for coating applications.

## Claims

### Claim 1

A composition, notably for solubilizing a fluoropolymer comprising:
a solvent blend comprising:
a) at least one Compound of formula (I):
R1C(═O)NR2R3 (I)
wherein:
R1 is an aliphatic saturated group, that can be linear or branched, having 1 to 6 carbon atoms, and substituted by one or more functional groups selected from a group consisting of —C(═O)OR and —C(═O)NR4R5, R being an alkyl group having 1 to 6 carbon atoms, and R4 and R5, identical or different, being methyl or ethyl groups;
R2 and R3, identical or different, being methyl or ethyl groups;
b) dimethylsulfoxide (DMSO).

### Claim 2 (depends on 1)

The composition according to claim 1, the compound of formula (I) is MeO(O═)C—Z—C(═O)NR2R3, wherein Z is a linear or branched divalent alkylene group comprising 2 to 5 carbon atoms and R2 and R3 are previously defined.

### Claim 3 (depends on 1)

The composition according to claim 1, the compound of formula (I) is a blend comprising:
a compound of formula (I) wherein R1 is —CH(CH2—CH3)—CH2—C(═O)OMe,
a compound of formula (I) wherein R1 is —CH2—CH(CH2—CH3)—C(═O)OMe,
a compound of formula (I) wherein R1 is —CH(CH3)—CH2—CH2—C(═O)OMe, and
a compound of formula (I) wherein R1 is —CH2—CH2—CH(CH3)—C(═O)OMe.

### Claim 4 (depends on 3)

The composition according to claim 3, wherein said blend further comprises a compound of formula (I) wherein R1 is —(CH2)4—C(═O)OMe.

### Claim 5 (depends on 1)

The composition according to claim 1, wherein said compound of formula (I) is R4R5NC(═O)—Z—C(O)NR2R3, wherein Z is a linear or branched divalent alkylene group comprising 2 to 5 carbon atoms and R2, R3, R4 and R5 are previously defined.

### Claim 6 (depends on 1)

The composition according to claim 1, wherein said compound of formula (I) is a blend of:
RO(O═)C—Z—C(═O)NR2R3; and
R4R5NC(═O)—Z—C(═O)NR2R3,
wherein Z is a linear or branched divalent alkylene group comprising 2 to 5 carbon atoms and R, R2, R3, R4, and R5 are previously defined.

### Claim 7 (depends on 1)

The composition according to claim 1, wherein the weight ratio between the compound of formula (I) and DMSO is of from 1/99 to 99/1.

### Claim 8 (depends on 1)

The composition according to claim 1, further comprising a fluoropolymer solubilized in the solvent blend.

### Claim 9 (depends on 1)

The composition according to claim 1, wherein the fluoropolymer is polyvinylidene fluoride (PDVF) and copolymer of vinylidene fluoride with comonomers hexafluoropropylene (HFP) and/or chlorotrifluoroethylene (CTFE).

### Claim 10 (depends on 9)

The composition according to claim 9, wherein the amount of fluoropolymer is of from 0.1 to 15% by weight.

### Claim 11 (depends on 1)

The composition according to claim 1, wherein R1 is a group of formula —Z—C(═O)OR′, with Z a linear or branched divalent alkylene group comprising 2 to 5 carbon atoms and R′ is an alkyl group comprising 1 to 4 carbon atoms.