Abstract:
The present invention provides novel packaging articles, e.g., food and beverage cans. Preferred cans typically comprise a body portion and an end portion, wherein at least one of the body and end portions are aluminum and are coated on at least one major surface with a coating composition of the present invention. Suitable coating compositions of the present invention comprise: one or more polyester resins, wherein at least one of the polyester resins has a glass transition temperature ("Tg") less than about 50 ~C, and wherein the polyester resin is formed by the reaction of one or more polyacid molecules and one or more polyol molecules; and a crosslinker. Preferred compositions are substantially free of mobile BPA and aromatic glycidyl ether compounds, e.g., BADGE, BFDGE and epoxy novalacs (e.g., NOGE) and more preferred compositions are also substantially free of bound BPA and aromatic glycidyl ether compounds. In more preferred embodiments (e.g., alcoholic beverage cans), the polyol molecules used to make the polyester resin are substantially free of NPG. The present invention also provides a method of making such cans.
Abstract:
Un bote para alimentos o bebidas, que comprende: una parte estructural; y una parte de los extremos; en el que al menos una de las partes estructural y los extremos es de aluminio y está revestido en al menos una superficie principal con una composición de revestimiento que comprende: entre 60 y 95 por ciento en peso (basado en el contenido de sólidos de la composición) de una combinación de dos o más resinas de poliésteres formadas mediante la reacción de una o más moléculas de poliácidos y una o más moléculas de polioles en la que la combinación tiene entre 60 y 90 por ciento en peso de resina de poliéster que tiene una Tg de menos de 50ºC; y entre 10 y 40 por ciento en peso de la resina de poliéster que tiene una Tg de más de 50ºC; y entre 5 y 40 por ciento en peso (basado en el contenido de sólidos de la composición) de un reticulante, y en el que la composición de revestimiento contiene menos de 1.000 ppm de BPA móvil y compuestos de glicidiléteres aromáticos y en el que la composición de revestimiento contiene menos de 1.000 ppm de BPA y compuestos de glicidil-éteres aromáticos de enlace y en el que la composición de revestimiento es reticulada.
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.
Abstract:
Coating compositions that include a thermoplastic dispersion and an epoxy-functional stabilizer having polyhydric phenols that exhibit estrogenic activity less than bisphenol S.
Abstract:
The present invention provides a method of coating a packaging container with a coating composition having crosslinkable polyester-polyurethane polymer with at least two carbamate sites, and a crosslinker. The method includes coating a generally planar substrate with the coating composition, curing and forming a container or a portion of a container. The present invention also provides a coating composition and coated substrates.