Chemically compatibilized fluoropolymer blends

Patent metadata

Field	Value
Publication number	US-12428551-B2
Application number	US-202217668048-A
Country	US
Kind code	B2
Filing date	Feb 9, 2022
Priority date	Aug 30, 2019
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A polymer alloy composition including: (a) a fluoropolymer selected from fluorinated ethylene propylene (FEP), perfluoroalkoxy alkane (PFA), ethylene tetra-fluoroethylene (ETFE), and a terpolymer of ethylene, tetrafluoroethylene, and hexafluoropropylene (EFEP); (b) a compatibilizing agent; and (c) a polyether imide (PEI) or polyimide (PI). Also disclosed is a method of forming a thermoplastic alloy. The polymer alloy may be used to form various extruded workpieces including, for example, a bag, film, container, filament, food package, coating (such as a coating or jacketing for a wire), powder for powder electrostatic powder coating, powder for dispersions, compression molded and various injection molded parts.

First claim

What is claimed is:

1. A polymer alloy composition comprising:
between about 70-80% perfluoroalkoxy alkane (PFA),
between about 10-20% reactive polymer compatibilizer,
between about 10-15% polyimide (PI),
between about 0.1-0.3% bis(oxazoline), and
between about 0.1-0.4% nanoparticles.

2. The polymer alloy composition of claim 1 , wherein the bis(oxazoline) compound is 1,4-Bis(4,5-dihydro-2-oxazolyl)benzene.

3. The polymer alloy composition of claim 1 , wherein the polyimide is a melt-processable thermoplastic polyimide (TPI).

4. The polymer alloy composition of claim 1 , further comprising nanoparticles.

5. The polymer alloy composition of claim 1 , wherein the reactive polymer compatibilizer comprises sheared PFA, 4,4′-(Hexafluoroisopropylidene)diphthalic Anhydride, 4,4′-Oxydianiline, and PEI-Amine.

6. The polymer alloy composition of claim 1 , wherein the reactive polymer compatibilizer comprises between about 75-85% sheared PFA, between about 2.5-3.5% 4,4′-(Hexafluoroisopropylidene)diphthalic anhydride, between 1.2-1.7% 4,4′-Oxydianiline, and between 10-15% PEI-Amine.

7. The polymer alloy composition of claim 1 , wherein the polymer alloy composition has a maximum tensile strength of between about 20 and 35 MPa.

8. The polymer alloy composition of claim 1 , wherein the polymer alloy composition has a coefficient of thermal expansion in the Z-direction of between about 115 and 145 (μm/m-C) at about 100° C.

9. The polymer alloy composition of claim 1 , wherein the polymer alloy composition has a coefficient of thermal expansion in the Z-direction of less than about 150 (μm/m-C) at about 150° C.

10. The polymer alloy composition of claim 1 , wherein the polymer alloy composition has a storage modulus of between about 200-350 MPa at about 100° C.

11. The polymer alloy composition of claim 1 , wherein the polymer alloy composition has a storage modulus of between about 150-250 MPa at about 150° C.

Assignees

• Daikin America Inc
• Daikin Ind Ltd

Inventors

• Martin Arthur W
• Brown Dakarai Kameron
• Ptak Kyle R
• Martin Halie Jill

Classifications

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08K5/353

  Five-membered rings · CPC title

• C08L79/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C08L27/22

  modified by chemical after-treatment · CPC title