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US 2020/0347264 A1Published application
Compositions for containers and other articles and methods of using same
AssigneeSwimc LLC
InventorsJeffrey Niederst, Richard H. Evans, Robert M. O'Brien, Kevin Romagnoli, Mark S. Von Maier
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Abstract
This invention provides a polymer, which is preferably a polyether polymer, for use in coating compositions. Containers comprising the polymer and methods of making such containers are also provided. The invention further provides powder coating compositions including the polymer, which have utility in a variety of coating end uses, including, for example, valve and pipe coatings.
Claims24
(canceled)
An article comprising:
- a food or beverage container, or a portion thereof, having:
- a metal substrate;
- and
- an interior food-contact coating disposed on at least a portion of the metal substrate, the coating formed from a water-based coating composition comprising:
- water;
- and
- a water-dispersible polyether polymer;
- wherein the polyether polymer exhibits a glass transition temperature of at least 60° C. to less than 150° C., has a number average molecular weight of at least 3,000, includes secondary hydroxyl groups and segments of the below Formula (I):
- —O—Ar—O— (I)
- wherein Ar is an aryl or heteroaryl group and each depicted oxygen is attached to an atom of the aryl or heteroaryl group as an ether linkage, and wherein the polyether polymer does not include any structural units derived from a polyhydric polyphenol.
7 more elements
A method comprising,
- applying a water-based coating composition on a surface of a metal substrate prior to or after forming the substrate into a metal food or beverage container or a portion thereof, wherein the water-based coating composition comprises:
- water;
- and
- a water-dispersible polyether polymer exhibits a glass transition temperature of at least 60° C., has a number average molecular weight of at least 3,000, and includes a plurality of segments of the below Formula (I):
- —O—Ar—O— (I)
- wherein Ar is an aryl or heteroaryl group and each depicted oxygen is attached to an atom of the aryl or heteroaryl group as an ether linkage, and wherein the polyether polymer does not include any structural units derived from a polyhydric polyphenol;
- and hardening the liquid coating composition to form an interior food-contact coating.
4 more elements
A method comprising,
- spray applying a water-based coating composition on an interior surface of a metal food or beverage container or a portion thereof, wherein the water-based coating composition comprises:
- water;
- and
- a water-dispersible polyether polymer that does not includes any halogens and exhibits a glass transition temperature of at least 70° C. to less than 130° C., has a number average molecular weight of at least 3,000, has a backbone that is free of ester linkages, includes CH2—CH(OH)—CH2— or —CH2—CH2—CH(OH)— backbone segments, and includes segments of the below Formula (I):
- —O—Ar—O— (I)
- wherein Ar is an aryl or heteroaryl group and each depicted oxygen is attached to an atom of the aryl or heteroaryl group as an ether linkage, and wherein the polyether polymer does not include any structural units derived from a polyhydric polyphenol;
- and hardening the liquid coating composition to form an interior food-contact coating.
4 more elements
Dependencies are inferred from the claim text.