Improvement of edge build and edge blister performance of coil coatings
AssigneeSwimc LLC
InventorsZhilian ZHOU, Charles I. Skillman, Richard H. Evans, Nhan T. Huynh
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Abstract
A liquid polymeric coating composition that upon application to a substrate, such as a coil substrate, preferably does not exhibit the edge build and edge blistering that commonly occurs with conventional liquid polymeric coating compositions. In some embodiments, the liquid polymeric coating composition is modified by tailoring the surface tension, the openness of the coating composition as indicated by the modulus of elasticity, or a combination thereof to reduce edge build and edge blistering.
Claims27
A method comprising:
- (a) providing a coil substrate,
- (b) applying a liquid polymeric coating composition to a surface of the coil substrate, wherein the liquid polymeric coating composition comprises at least 15% by weight solids, and exhibits one or both of (i) a surface tension of at least 31.7 dyne/cm according to the Surface Tension Test, or (ii) an inflection point for a modulus of elasticity of at least 160° C. according to the Dynamic Mechanical Analysis Test Procedure, and
- (c) curing the liquid polymeric coating composition to form a coating on the surface of the coil substrate.
4-6. (canceled)
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16-19. (canceled)
A food or beverage container, or a portion thereof, comprising a metal substrate, wherein at least a portion of the metal substrate is coated with a coating prepared from a liquid polymeric coating composition comprising:
- a polymeric resin, an optional crosslinker, an optional catalyst, and an optional wax wherein the liquid polymeric coating composition possesses one or more of (i) a surface tension of at least 31.7 dyne/cm according to the Surface Tension Test, or (ii) an inflection point for a modulus of elasticity of at least 160° C. according to the Dynamic Mechanical Analysis Test Procedure.
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28-29. (canceled)
A composition suitable for forming an interior food-contact coating of a food or beverage container comprising a liquid polymeric coating composition, wherein the liquid polymeric coating composition comprises at least 15% by weight solids, and possesses one or both of (i) a surface tension of at least 31.7 dyne/cm according to the Surface Tension Test, or (ii) an inflection point for modulus of elasticity of at least 160° C. according to the Dynamic Mechanical Analysis Test Procedure.
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Dependencies are inferred from the claim text.