Coating Composition for Metal Substrates
    1.
    发明申请
    Coating Composition for Metal Substrates 有权
    金属基材的涂料组合物

    公开(公告)号:US20140338290A1

    公开(公告)日:2014-11-20

    申请号:US14275377

    申请日:2014-05-12

    摘要: 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.

    摘要翻译: 本发明提供了新颖的包装制品,例如食品和饮料罐。 优选的罐通常包括主体部分和端部部分,其中主体部分和端部部分中的至少一个是铝,并且用至少一个主表面涂覆有本发明的涂料组合物。 本发明的合适的涂料组合物包含:一种或多种聚酯树脂,其中至少一种聚酯树脂的玻璃化转变温度(“Tg”)低于约50℃,其中聚酯树脂由 一种或多种多酸分子与一种或多种多元醇分子的反应; 和交联剂。 优选的组合物基本上不含活性BPA和芳族缩水甘油醚化合物,例如BADGE,BFDGE和环氧树脂(例如NOGE),更优选的组合物也基本上不含结合的BPA和芳族缩水甘油醚化合物。 在更优选的实施方案(例如,酒精饮料罐)中,用于制备聚酯树脂的多元醇分子基本上不含NPG。 本发明还提供了制造这种罐的方法。