Compositions for Containers and Other Articles and Methods of Using Same

摘要

This invention provides a polymer, which is preferably a polyether polymer. The polymer may be uses in coating compositions. Containers and other articles comprising the polymer and methods of making such containers and other articles are also provided. The invention further provides compositions including the polymer (e.g., powder coatings), which have utility in a variety of coating end uses, including, for example, valve and pipe coatings.

主权项

1. An article comprising:
a food or beverage container, or a portion thereof, having: a metal substrate; and a coating composition applied on at least a portion of the metal substrate, the coating composition comprising: a polyether polymer that includes at least 25% by weight of aryl or heteroaryl groups, wherein the coating composition is substantially free of bound bisphenol A, bisphenol F, bisphenol S, polyhydric phenols having estrogenic activity greater than or equal to that of bisphenol S, and epoxides thereof; wherein the polyether polymer is formed by reacting ingredients including: (i) an extender and (ii) a diepoxide compound, wherein the extender or diepoxide compound, or both, includes one or more segments of the below Formula (I):wherein:
each of the oxygen atoms depicted in Formula (I) is present in an ether or ester linkage; v is independently 0 to 4 when t is 0 and v is independently 0 to 3 when t is 1; w is 4; when t is 1 each of the phenylene groups depicted in Formula (I) includes at least one Hydrogen atom attached to the ring at an ortho position relative to the depicted oxygen atoms; each R1, if present, is independently an atom or group having an atomic weight of at least 15 Daltons that is substantially non-reactive with an epoxy group; R2, if present, is a divalent group; n is 0 or 1; with the proviso that if n is 0, the phenylene groups depicted in Formula (I) can optionally join to form a fused ring system in which case w is 3 and v is 0 to 2; t is 0 or 1; and two or more R1 and/or R2 groups can join to form one or more cyclic groups.