Back to results
US 9,132,449 B2Granted
Coating system
AssigneeValspar Sourcing, Inc.
InventorsPhilippe Michel, Jean-Michel Sauton, Karine Le Claire
Life of this patent
Estimating the term…
Abstract
A coating system is provided that includes an undercoat composition that includes a thermoplastic dispersion. In certain preferred embodiments, the coating system is a multi-coat system that includes the undercoat composition and an overcoat composition that includes a thermoplastic dispersion. In one embodiment, the coating system is suitable for use on a food-contact surface of a food or beverage container.
Claims19
A coated article, comprising:
- a twist off cap or lid closure for use in sealing a food or beverage container, comprising:
- a metal substrate;
- a multi-coat coating formed from a coating system applied to at least a portion of the metal substrate, the coating system comprising:
- an overcoat layer formed from an overcoat composition comprising more than 10 wt-% of a polyester polymer, based on the total nonvolatile weight of the overcoat composition, and thermoplastic halogenated polyolefin polymer particles dispersed in an overcoat carrier;
- and
- an undercoat layer formed from an undercoat composition applied to the metal substrate comprising thermoplastic halogenated polyolefin polymer particles dispersed in an undercoat carrier;
- and
- wherein the coating system is substantially free of bound BPA;
- and
- a closure compound applied to the multi-coat coating.
7 more elements
A coating system, comprising:
- an overcoat composition comprising more than 10% by weight of a polyester polymer, based on the total nonvolatile weight of the overcoat composition, and thermoplastic halogenated polyolefin particles dispersed in an overcoat carrier liquid;
- and
- an undercoat composition comprising:
- at least 30 wt-% of halogenated thermoplastic poly(vinyl chloride) polymer particles dispersed in an undercoat carrier liquid;
- at least 5 wt-% of a stabilizer;
- at least 1 wt-% of a crosslinker;
- and
- less than 40 wt-%, if any, of a polyester polymer;
- wherein the above weight percentages are based on the total nonvolatile weight of the undercoat composition, and wherein the coating system comprises a hardenable coating system that is substantially free of bound BPA and oxirane-containing compounds;
- and
- a closure compound.
8 more elements
A method comprising:
- applying an undercoat composition to at least a portion of a metal substrate, the undercoat composition comprising:
- from 10 to 60 wt-% of thermoplastic halogenated polyolefin polymer particles dispersed in an undercoat carrier liquid, based on the total nonvolatile weight of undercoat composition,
- a stabilizer,
- a crosslinker, and
- less than 40 wt-%, if any, of a polyester polymer, based on the total nonvolatile weight of the undercoat composition;
- drying and at least partially curing the undercoat composition and then applying an overcoat composition to the coated metal substrate, the overcoat composition comprising more than 10% by weight of a polyester polymer, based on the total nonvolatile weight of the overcoat composition, and halogenated thermoplastic polyolefin particles dispersed in an overcoat carrier;
- curing the overcoat composition to produce a cured coating system adhered to the metal substrate;
- forming a closure, for use in sealing a food or beverage container, from the coated metal substrate including the cured coating system;
- and
- applying a closure compound to the cured coating system of the closure.
7 more elements
Dependencies are inferred from the claim text.