IP Library › Patent Application 16648602
Patent Application
App. No. 16/648,602

COATING COMPOSITIONS INCLUDING A FURAN-CONTAINING POLYESTER, ARTICLES, AND METHODS OF COATING

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Quick Facts
Patent No.
US None
App. No.
16/648,602
Abstract

A food or beverage container coating composition, coated article, and method of coating, wherein the coating composition comprises a furan-containing polyester and a liquid carrier (e.g., water and/or an organic solvent).

Claims (18)

1 . A food or beverage container coating composition comprising a furan-containing polyester and a liquid carrier; wherein the furan-containing polyester comprises at least 5 wt-% furan groups in the backbone of the polyester.

2 . The container coating composition of claim 1 wherein the furan-containing polyester has a molecular weight of at least 1,000 Da and up to 20,000 Da.

3 . The container coating composition of claim 1 wherein the furan-containing polyester has a Tg of at least 0° C. and less than 150° C.

4 . The container coating composition of claim 1 wherein the furan-containing polyester includes less than 10 wt-% terephthalic acid.

5 . The container coating composition of claim 1 wherein the furan-containing polyester comprises up to 40 wt-% furan groups in the backbone of the polyester.

6 . The container coating composition of claim 1 which has a viscosity of at least 50 mPa/s and up to 50,000 mPa/s at 25° C.

7 . The container coating composition of claim 1 which is thermally curable at an oven temperature of 170° C. to 230° C.

8 . The container coating composition of claim 1 which comprises water, wherein the coating composition is an aqueous coating composition.

9 . The container coating composition of claim 1 which comprises an organic solvent, wherein the coating composition is a solvent-based coating composition that includes 0 to 2 wt-% water.

10 . A food or beverage container comprising a metal substrate having a surface at least partially coated with a coating comprising a furan-containing polyester; wherein the furan-containing polyester comprises at least 5 wt-% furan groups in the backbone of the polyester.

11 . The container of claim 10 wherein the coating comprising a furan-containing polyester is an inside coating, and the inside coating has an average overall dry coating thickness of 1 micron to 20 microns.

12 . A food or beverage container comprising a metal substrate having a surface at least partially coated with a coating comprising a furan-containing polyester formed from the coating composition of claim 1 .

13 . A method of coating a food or beverage container, the method comprising:

providing a food or beverage container coating composition of claim 1 ;

applying the coating composition to at least a portion of a metal substrate prior to or after forming the metal substrate into a food or beverage container or portion thereof; and

thermally curing the coating composition to form a cured coating.

14 . The method of claim 13 wherein the metal substrate is a flat substrate, and the method further comprises forming the flat metal substrate into at least a portion of a food or beverage can after thermally curing the coating composition.

15 . The method of claim 14 wherein the metal substrate is in the form of at least a portion of a preformed food or beverage can.