Polyesters and articles made therefrom

Patent metadata

Field	Value
Publication number	US-2016237206-A1
Application number	US-201615139377-A
Country	US
Kind code	A1
Filing date	Apr 27, 2016
Priority date	Mar 30, 2012
Publication date	Aug 18, 2016
Grant date	—

Abstract

Disclosed herein are polyesters and articles made therefrom. The article comprising a substrate comprising a first surface and a second surface, the second surface in contact with an outside environment, wherein the substrate comprises a polymer comprising poly(trimethylene furandicarboxylate) (PTF), and wherein the polymer provides an improvement in gas barrier properties of the substrate as compared to a substrate comprising nascent poly(ethylene terephthalate) (PET).

First claim

1 - 50 . (canceled)

51 . Use of a polymer composition as an oxygen barrier layer, as a carbon dioxide barrier layer and/or as a moisture barrier layer wherein the polymer composition comprises a polymer having a repeat unit of the formula:

wherein n is 10-1000.

52 . The use of the polymer composition of claim 51 , wherein the polymer is:
(a) poly(trimethylene furandicarboxylate) derived from 2,5-furan dicarboxylic acid or a derivative thereof and 1,3-propanediol; (b) a polymer blend comprising 0.1-99.9% by weight of poly(trimethylene furandicarboxylate) and 99.9-0.1% by weight of a poly(alkylene terephthalate), based on the total weight of the polymer blend, wherein the poly(alkylene terephthalate) comprises monomeric units derived from terephthalic acid and a C 2 -C 12 aliphatic diol; or (c) a poly(trimethylene furandicarboxylate) copolymer derived from 2,5-furan dicarboxylic acid or a derivative thereof, at least one of a diol or a polyol monomer, and at least one of a polyfunctional aromatic acid or a hydroxyl acid, wherein the molar ratio of 2,5-furan dicarboxylic acid to at least one of a polyfunctional aromatic acid or a hydroxy acid is in the range of 1:100 to 100:1, and wherein the molar ratio of diol to total acid content is in the range of 1.2:1 to 3:1.

53 . The use of the polymer composition of claim 51 , wherein the polymer composition provides an improved barrier to at least one of oxygen, carbon dioxide or moisture as compared to a 100% poly(ethylene terephthalate) substrate, wherein the oxygen permeability is measured according to ASTM D-3985, the carbon dioxide permeability is measured according to ASTM F-2476-05, and the moisture permeability is measured according to ASTM F-1249-06.

54 . The use of the polymer composition of claim 51 , wherein the oxygen permeability is less than about 100 cc-mil/m 2 -day-atm at 23° C. and 0%, 50% or 77% relative humidity; or wherein the carbon dioxide permeability is less than about 500 cc-mil/m 2 -day-atm at 23° C. and 0% relative humidity; or wherein the moisture permeability is less than about 80 g-mil/m 2 -day-atm at 37.8° C. and 100% relative humidity.

55 . The use of the polymer composition of claim 51 , wherein the polymer has a heat of crystallization of less than 100 J/g.

56 . The use of the polymer composition of claim 51 , wherein the polymer composition consists essentially of poly(trimethylene-2,5-furandicarboxylate) and is amorphous.

57 . The use of the polymer composition of claim 51 , wherein the polymer composition comprises a film or a sheet.

58 . The use of the polymer composition of claim 57 , wherein the film is uniaxially oriented or biaxially oriented.

59 . The use of the polymer composition of claim 57 , wherein the film or sheet is a monolayer or a multilayer article.

60 . The use of the polymer composition of claim 57 , wherein the film or sheet is a container.

61 . The use of the polymer composition of claim 60 , wherein the container is a beverage container.

Assignees

• Du Pont

Inventors

• Nederberg Fredrik
• Rajagopalan Bhuma
• Uradnisheck Julius

Classifications

• Y10T428/31678

  Of metal · CPC title

• C09D167/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C09D167/06 takes precedence) · CPC title

• Y10T428/1397

  Single layer [continuous layer] · CPC title

• B32B2307/7244

  Oxygen barrier · CPC title

• B65D1/0215

  multilayered (B65D81/3837 takes precedence) · CPC title