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US 11,306,218 B2Granted
Container coating system
AssigneeSwimc LLC
InventorsJeffrey Niederst, Richard H. Evans, Robert M. O'Brien, Kevin Romagnoli, Mark S. Von Maier, Mary E. Tishey, Gregory M. Paulson
Life of this patent
Estimating the term…
Abstract
A multi-coat coating system having an undercoat composition and an overcoat composition, wherein the undercoat, overcoat or both the undercoat and overcoat contain a polymer having segments of a specified formula and are substantially free of polyhydric phenols having estrogenic activity greater than or equal to that of bisphenol S. The coating system is suitable for use on a food-contact surface of food or beverage containers.
Claims32
A multi-coat coating system comprising:
- an undercoat composition comprising:
- a polymer having two or more aryl or heteroaryl groups joined by a linking group having a molecular weight of about 125 Daltons to about 500 Daltons;
- and
- an overcoat composition comprising at least one thermoplastic material or a polyester polymer,
- wherein the polymer is derived from polyhydric phenols having a logarithmic Relative Proliferative Effect (RPE) of −2 or less.
2 more elements
An article comprising:
- a container, or a portion thereof, comprising a metal substrate;
- and
- a multi-coat coating system applied on at least a portion of the metal substrate, the multi-coat coating system comprising:
- an undercoat composition comprising a polymer having two or more aryl or heteroaryl groups joined by a linking group having a molecular weight of about 125 Daltons to about 500 Daltons;
- and
- an overcoat composition comprising at least one thermoplastic material or a polyester polymer,
- wherein the polymer is derived from polyhydric phenols having a logarithmic Relative Proliferative Effect (RPE) of −2 or less.
4 more elements
A method comprising:
- applying an undercoat composition on at least a portion of a metal substrate prior to or after forming the metal substrate into a container;
- drying or at least partially curing the undercoat composition;
- and
- applying and curing an overcoat composition on the undercoat composition to produce a cured multi-coat coating adhered to the metal substrate,
- wherein the undercoat composition comprises a polymer having two or more aryl or heteroaryl groups joined by a linking group having a molecular weight of about 125 Daltons to about 500 Daltons,
- wherein the overcoat composition comprises at least one thermoplastic material or a polyester polymer, and
- wherein the polymer is derived from polyhydric phenols having a logarithmic Relative Proliferative Effect (RPE) of −2 or less.
4 more elements
Dependencies are inferred from the claim text.