FURAN BASED POLYAMIDES AND ARTICLES MADE THEREFROM

1 . A multilayer structure comprising:

a) a first layer selected from the group consisting of polymers, composites, metals, alloys, glass, silicon, ceramics, wood, and paper; and

b) a furan-based polyamide layer disposed on at least a portion of the first layer, wherein the furan-based polyamide is derived from:

i. one or more dicarboxylic acids or derivatives thereof selected from the group consisting of an aliphatic diacid, an aromatic diacid and an alkylaromatic diacid, wherein at least one of the dicarboxylic acid is furan dicarboxylic acid or a derivative thereof, and

ii. one or more diamines s selected from the group consisting an aliphatic diamine, an aromatic diamine and an alkylaromatic diamine, and

wherein the furan-based polyamide layer provides a substantial barrier to gas permeation.

2 . The multilayer structure of claim 1 , wherein the first layer is selected from the group consisting of polyurethane, polyester, polyolefin, polyamide, polyimide, polycarbonate, polyether, polyacrylates, styrenics, fluoropolymer, polyvinylchlorides, epoxies, EVOH and polysiloxanes.

3 . The multilayer structure of claim 1 , wherein the furan-based polyamide comprises the following repeat unit:

wherein R is selected from the group consisting of an aliphatic, an aromatic and an alkylaromatic group.

4 . The multilayer structure of claim 3 , wherein R is a C2-C18 hydrocarbon or fluorocarbon group.

5 . The multilayer structure of claim 1 , wherein the furan-based polyamide layer is a polymer blend of the furan-based polyamide and a polymer selected from the group consisting of polyurethanes, polyesters, polyolefins, polyamides, polyimides, polycarbonates, polyethers, polyacrylates, styrenics, fluoropolymers, polysiloxanes, EVOH, and mixtures thereof,

wherein the furan-based polyamide is present in an amount in the range of 0.1-99.9% by weight, based on the total weight of the polymer blend.

6 . The multilayer structure of claim 1 , wherein the furan-based polyamide layer is a polymer blend comprising poly(trimethylene furandicarbonamide) (3AF) and a second furan-based polyamide different from 3AF, and

wherein the amount of 3AF is 0.1-99.9% by weight, based on the total weight of the polymer blend.

7 . The multilayer structure of claim 1 further comprising a second layer disposed on at least a portion of the furan-based polyamide layer, such that at least a portion of the furan-based polyamide layer is sandwiched between the first tie layer and the second layer.

8 . The multilayer structure of claim 1 , wherein the furan-based polyamide is a furan-based polyamide derived from:

a) two or more diacids or derivatives thereof selected from the group consisting of an aliphatic diacid, an aromatic diacid and an alkylaromatic diacid,

wherein the two or more diacids comprises at least 50.1 mol % of furan dicarboxylic acid or a derivative thereof, based on the total amount of the diacids or derivatives thereof; and

b) one or more diamines selected from the group consisting of an aliphatic diamine, an aromatic diamine and an alkylaromatic diamine.

9 . An article comprising the multilayer structure of claim 1 ,wherein the article is a film, a sheet, a coating, shaped or modeled article, a layer in a multilayer laminate, filaments, fibers, spun yam, woven fabric, garment, or non-woven web, and wherein the multilayer structure provides gas permeation barrier to a product.

10 . The article of claim 9 , wherein the product is at least one of an oxygen-sensitive product, a moisture-sensitive product, or a carbonated beverage.

11 . A gas impermeable structure comprising two or more layers, wherein at least one of the layers is a gas permeation barrier layer comprising a furan-based polyamide comprises the following repeat unit:

wherein R is selected from the group consisting of an aliphatic, an aromatic and an alkylaromatic group.