Metal food or beverage containers are coated with a polyether polymer containing at least two ether linkages in the polymer backbone. The polymer is substantially free of segments derived from bisphenol A and epoxides thereof, and is a reaction product of, or can be derived from, (i) an aryl- or heteroaryl-group-containing diepoxide that is not derived from a polyhydric phenol or a glycidyl ester and (ii) a polymer backbone extender that has two functional groups reactive with an epoxy group and which following reaction with the diepoxide provides at least one pendant aryl or heteroaryl group on the polymer backbone, or provides at least one divalent aryl or heteroaryl group in the polymer backbone and linked to the backbone via ether linkages.
金属食品或饮料容器表面涂有一种聚醚聚合物,聚合物主链中至少含有两个醚键。这种聚合物基本上不含源自双
酚 A 及其
环氧化物的部分,并且是以下物质的反应产物,或可以源自以下物质、(i) 含芳基或杂芳基的二
环氧化物,该二
环氧化物不是从多元醇或
缩水甘油酯中提取的;(ii) 聚合物骨架延伸剂,该聚合物骨架延伸剂具有两个与环氧基反应的官能团,与二
环氧化物反应后,在聚合物骨架上形成至少一个悬垂芳基或杂芳基,或在聚合物骨架上形成至少一个二价芳基或杂芳基,并通过醚键与骨架连接。