Curable fluoropolymer compositions comprising metal fluoride particles and articles therefrom

Patent metadata

Field	Value
Publication number	US-12509569-B2
Application number	US-202017626226-A
Country	US
Kind code	B2
Filing date	Aug 24, 2020
Priority date	Aug 27, 2019
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Described herein is a curable fluoropolymer composition comprising: an amorphous fluoropolymer; and particles of a metal fluoride, wherein the particles are not substantially surface treated and wherein the metal of the metal fluoride comprises at least one of an alkaline earth metal, a Group III transition metals, and a Lanthanide metals. Also described are cured articles made with the curable fluoropolymer composition.

First claim

What is claimed is:

1 . A curable fluoropolymer composition comprising:
an amorphous fluoropolymer, wherein the amorphous fluoropolymer comprises at least one of an iodine-, a bromine- and a nitrogen-containing cure site group; and particles of a metal fluoride, wherein the particles comprise less than 10% by weight of organic moieties on the particles' surface and wherein the metal of the metal fluoride comprises at least one of an alkaline earth metal, a Group III transition metals, and a Lanthanide metals.

2 . The curable fluoropolymer composition of claim 1 , wherein the metal fluoride has a solubility in water at 20° C. and ambient pressures of less than 0.5 g/100 g.

3 . The curable fluoropolymer composition of claim 1 , wherein the metal of the metal fluoride comprises at least one of group consisting of Ca, Mg, Y, and Yb.

4 . The curable fluoropolymer composition of claim 1 , wherein the particles of a metal fluoride have an average diameter of less than 1 mm.

5 . The curable fluoropolymer composition of claim 1 , wherein the particles of a metal fluoride have an average diameter of less than 500 nm.

6 . The curable fluoropolymer composition of claim 1 , comprising at least 0.1% and at most 30 wt % of the particles of metal fluoride.

7 . The curable fluoropolymer composition of claim 1 , wherein the amorphous fluoropolymer is derived from a monomer selected from at least one of a tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, propylene, perfluoropropyl vinyl ether, CF 2 ═CF—O—CF 2 —O—CF 3 , CF 2 ═CF—O—CF 2 —O—CF 2 CF 3 , CH 2 ═CF—CF 3 , perfluoromethylvinyl ether, 3-methoxy perfluoropropylvinyl ether, CF 2 CF—O—CF 2 —O—CF 2 CF 2 CF 3 , and CF 2 CF—O—CF 2 —O—CF 2 CF 2 CF 2 —O—C 3 F 7 .

8 . The curable fluoropolymer composition of claim 1 , wherein the nitrogen-containing cure site is selected from at least one of a nitrile, an imidate, an amidoxime, and an amidrazone.

9 . The curable fluoropolymer composition of claim 1 , wherein the metal of the metal fluoride comprises at least one of an alkaline earth metal, and a Group III transition metals.

10 . The curable fluoropolymer composition of claim 1 , wherein the amorphous fluoropolymer is perfluorinated.

11 . The curable fluoropolymer composition of claim 10 , wherein the amorphous fluoropolymer is derived from at least one of a perfluorinated olefin and a perfluorinated vinyl ether.

12 . The curable fluoropolymer composition of claim 1 , further comprising a curing agent.

13 . The curable fluoropolymer composition of claim 12 , wherein the curing agent is at least one of: a peroxide, bisaminophenols, a triazine-forming curing agent, and an onium.

14 . A method of making an article comprising: providing a curable fluoropolymer composition of claim 1 ; and then curing the composition.

15 . A cured article comprising:
a fluoroelastomer, wherein the fluoroelastomer comprises at least one of an iodine-, a bromine- and a nitrogen-containing cure site group; and particles of a metal fluoride, wherein the particles comprise less than 10% by weight of organic moieties on the particles' surface and wherein the metal of the metal fluoride comprises at least one of an alkaline earth metal, a Group III transition metal particles, and a Lanthanide.

16 . The cured article of claim 15 , wherein the fluoroelastomer is perfluorinated.

17 . The cured article of claim 15 , wherein the metal fluoride has a solubility in water at 20° C. and ambient pressures of less than 0.5 g/100 g.

18 . The cured article of claim 15 , wherein the metal of the metal fluoride comprises at least one of group consisting of Ca, Mg, Y, and Yb.

19 . The cured article of claim 15 , wherein the particles of a metal fluoride have an average diameter of less than 1 mm.

20 . The cured article of claim 15 , wherein the cured article comprises at least 0.1% and at most 30 wt % of the particles of metal fluoride.

Assignees

• 3M Innovative Properties Company

Inventors

• Suzuki Yuta
• Fukushi Tatsuo

Classifications

• C08K2003/166

  Magnesium halide, e.g. magnesium chloride · CPC title

• C08K2003/164

  Aluminum halide, e.g. aluminium chloride · CPC title

• C08K3/105

  Compounds containing metals of Groups 1 to 3 or of Groups 11 to 13 of the Periodic Table · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• C08K2003/162

  Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride · CPC title