# US 2020/0399432 A1 · Non-aqueous dispersion

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- Number: US 2020/0399432 A1
- Document ID: US20200399432A1
- Status: Published application
- Kind: A1
- Application number: 16/971,961
- Filed: 2019-02-07
- Published: 2020-12-24
- Earliest claimed: 2018-02-23
- Assignees: Daikin Industries, Ltd.
- Applicants: Daikin Industries, Ltd.
- Inventors: Haruna MATSUMOTO; Shinji MURAKAMI
- Web page: https://patentgrep.com/patent/US20200399432A1

## CPC

- C08J 3/11: from solid polymers
- C09D 127/18: Homopolymers or copolymers of tetrafluoroethene
- C08F 114/26: Tetrafluoroethene
- C08F 214/26: Tetrafluoroethene
- C08J 2327/18: Homopolymers or copolymers of tetrafluoroethylene
- C08J 2327/20: Homopolymers or copolymers of hexafluoropropene
- 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)
- 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)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a highly stable non-aqueous dispersion even without surfactants. The present invention relates to a non-aqueous dispersion including a fluoropolymer and a non-aqueous solvent, the fluoropolymer in the non-aqueous dispersion having an average dispersed particle size of smaller than 1.0 μm, the fluoropolymer being present in an amount of 5 to 45% by mass, the non-aqueous solvent having a surface tension of 30 mN/m or lower, the non-aqueous dispersion containing a surfactant in an amount of less than 0.1% by mass relative to the fluoropolymer.

## Claims

### Claim 1

A non-aqueous dispersion comprising:
a fluoropolymer; and
a non-aqueous solvent,
the fluoropolymer in the non-aqueous dispersion having an average dispersed particle size of smaller than 1.0 the fluoropolymer being present in an amount of 5 to 45% by mass,
the non-aqueous solvent having a surface tension of 30 mN/m or lower,
the non-aqueous dispersion containing a surfactant in an amount of less than 0.1% by mass relative to the fluoropolymer,
wherein the fluoropolymer is a perfluoropolymer,
wherein the perfluoropolymer is at least one selected from the group consisting of polytetrafluoroethylene (PTFE), a tetrafluoroethylene (TFE)/perfluoro(alkyl vinyl ether) (PAVE) copolymer (PFA), and a TFE/hexafluoropropylene (HFP) copolymer (FEP),
wherein the PTFE has a melting point of 324° C. to 333° C.,
wherein the PFA has a melting point of 280° C. to 322° C.,
wherein the FEP has a melting point of 150° C. to 320° C.

### Claim 2 (depends on 1)

The non-aqueous dispersion according to claim 1,
wherein the non-aqueous dispersion has a percentage of separation of 50% or lower after standing for 24 hours.

### Claim at position 3

3-4. (canceled)

### Claim 5 (depends on 1)

The non-aqueous dispersion according to claim 1,
wherein the non-aqueous dispersion is a release agent, a thickener, or a lubricant.