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US 12,234,371 B2Granted
Coating compositions for packaging articles and methods of coating
AssigneeSwimc LLC
InventorsRichard H. Evans, Jeffrey Niederst, Robert M. O'Brien, Benoit Prouvost, Kevin Romagnoli, Grant Schutte, Paul Stenson, Tom Van Kuren
Life of this patent
Estimating the term…
Abstract
This invention provides a polymer that is useful in a variety of applications, including as a binder polymer of a coating composition, and especially a packaging coating composition. Packaging articles (e.g., containers) comprising the polymer and methods of making such packaging articles are also provided.
Claims28
A food or beverage can coating composition that includes:
- A polyether polymer having a glass transition temperature (“Tg”) of at least 80° C. and less than 130° C., a number average molecular weight of at least 2,000, and a backbone that includes a polycyclic group having ring atoms that include one or more heteroatoms;
- and
- a carrier liquid;
- wherein the coating composition is at least substantially free of bisphenol A and diglycidyl ether of bisphenol A, and is a liquid suitable for use in forming a food-contact coating.
1 more element
A food or beverage can coating composition that includes:
- a polyether polymer having a backbone formed from reactants including a diglycidyl ester or diglycidyl ether of tetramethylcyclobutanediol, the polyether polymer having a number average molecular weight of at least 2,000 and having a glass transition temperature (“Tg”) of at least 80° C. and less than 130° C.;
- and
- a carrier liquid;
- wherein the coating composition is at least substantially free of bisphenol A and diglycidyl ether of bisphenol A, and is suitable for use in forming a food-contact coating.
1 more element
A method, including:
- applying a food or beverage can coating composition on at least a portion of a surface of a metal substrate prior to, or after, forming the substrate into a food or beverage container or a portion thereof, wherein the coating composition includes:
- a polyether polymer having a backbone formed from reactants including a diglycidyl ester or diglycidyl ether of tetramethylcyclobutanediol, the polyether polymer having a number average molecular weight of at least 2,000 and having a glass transition temperature (“Tg”) of at least 80° C. and less than 130° C.;
- and
- a carrier liquid;
- and
- wherein the coating composition is at least substantially free of bisphenol A and diglycidyl ether of bisphenol A, and is suitable for use in forming a food-contact coating.
3 more elements
A method, including:
- applying a coating composition on at least a portion of a surface of a metal substrate prior to, or after, forming the substrate into a food or beverage container or a portion thereof;
- wherein the coating composition is at least substantially free of bisphenol A and diglycidyl ether of bisphenol A and is a liquid comprising:
- a polyether polymer having a glass transition temperature (“Tg”) of at least 80° C. and less than 130° C., a number average molecular weight of at least 2,000, and a backbone that includes a polycyclic group having ring atoms that include one or more heteroatoms;
- and
- a carrier liquid.
2 more elements
Dependencies are inferred from the claim text.