# US 9,434,797 B2 · Ultra-high molecular weight poly(vinylidene fluoride)

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- Number: US 9,434,797 B2
- Document ID: US9434797B2
- Status: Granted
- Kind: B2
- Application number: 14/301,567
- Filed: 2014-06-11
- Published: 2014-10-02
- Granted: 2016-09-06
- Earliest claimed: 2006-07-06
- Assignees: Arkema Inc.
- Applicants: Arkema Inc.
- Inventors: Ramin Amin-Sanayei
- Web page: https://patentgrep.com/patent/US9434797B2

## CPC

- C08F 14/185: {Monomers containing fluorine not covered by the groups C08F14/20 - C08F14/28}
- C08F 14/18: Monomers containing fluorine
- C08F 14/22: Vinylidene fluoride
- C08F 14/24: Trifluorochloroethene
- C08F 14/28: Hexafluoropropene
- C08L 27/16: Homopolymers or copolymers or vinylidene fluoride
- Y10T 428/2935: Discontinuous or tubular or cellular core
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a polyvinylidene fluoride polymer having an ultra-high molecular weight, and unexpected physical properties. The ultra-high molecular weight polymer is clear, has a lower melting point, reduced crystallinity, excellent impact resistance, and a high elongation at the yield point. The ultra-high molecular weight polyvinylidene fluoride can be alone, or blended with other polymers, in final applications and articles.

## Claims

### Claim 1

An ultra-high molecular weight polyvinylidene fluoride, wherein said ultra-high molecular weight polyvinylidene fluoride is soluble in n-methyl pyrrolidone (NMP) at 20° C., and when dissolved at 10% in (NMP) at 20° C., has a solution viscosity of greater than 35 Pa-s measured at 0.1 s−1.

### Claim 2 (depends on 1)

The ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein said ultra-high molecular weight polyvinylidene fluoride has a solution viscosity of greater than 45 Pas in 10% NMP at 20° C., and 0.1 s−1.

### Claim 3 (depends on 2)

The ultra-high molecular weight polyvinylidene fluoride of claim 2, wherein said ultra-high molecular weight polyvinylidene fluoride has a solution viscosity of greater than 50 Pa-s in 10% NMP at 20° C. and 0.1 s−1.

### Claim 4 (depends on 1)

The ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein said polyvinylidene fluoride is a homopolymer.

### Claim 5 (depends on 1)

The ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein said polyvinylidene fluoride is a copolymer.

### Claim 6 (depends on 5)

The ultra-high molecular weight polyvinylidene fluoride of claim 5, wherein said polyvinylidene fluoride is a copolymer of vinylidene fluoride and hexafluoropropene.

### Claim 7 (depends on 1)

The ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein said polyvinylidene fluoride is in the form of a powder or pellets.

### Claim 8 (depends on 1)

The ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein the ultra-high molecular weight polyvinylidene fluoride is blended with a polyvinylidene fluoride other than an ultra-high molecular weight polyvinylidene fluoride having a solution viscosity of greater than 35 Pa-s at 10% PVDF in n-methyl pyrrolidone (NMP) at 20° C. and 0.1 s−1.

### Claim 9 (depends on 1)

The ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein the polyvinylidene fluoride comprises a copolymer containing at least 50 mole percent of vinylidene fluoride copolymerized with at least one comonomer selected from the group consisting of tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, pentafluoropropene, perfluoromethyl vinyl ether, and perfluoropropyl vinyl ether.

### Claim 10 (depends on 1)

The ultrahigh molecular weight polyvinylidene fluoride of claim 1, Wherein said polyvinylidene fluoride contains less than 500 ppm of residual chain transfer agent, and from 100 to 2000 ppm total of organic peroxide initiator residuals plus chain transfer agent, based on the total weight of monomer.

### Claim 11 (depends on 1)

The ultrahigh molecular weight polyvinylidene fluoride of claim 1, wherein said solution of said polyvinylidene fluoride dissolved at 10% in (NMP) at 20° C., is non-Newtonian and exhibits shear thinning, wherein the solution viscosity at 10% PVDF in n-methyl pyrrolidone (NMP) at 20° C. and 0.1 s−1 is at least twice as large as when the same solution is measured at 10 s−1.

### Claim 12 (depends on 1)

An article comprising the ultra-high molecular weight polyvinylidene fluoride of claim 1, wherein said article is selected from the group consisting of highly orientated fibers; high impact resistance articles; polymer processing additives for polyolefins; as a binder for electrode and/or as separator in liquid Li-ion batteries; gel extruded fibers; gel extruded films; membranes and hollow fibers; and cast membranes, films and hollow fibers.