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 used 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, wherein the coating composition comprises a polyether polymer that: (a) includes at least 25% by weight of aryl or heteroaryl groups and (b) 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; and wherein the polymer is formed by reacting ingredients including: (i) an extender comprising a dihydric phenol that does not include substituent groups at ortho ring positions relative to the phenol hydroxyl groups and (ii) a diepoxide compound that includes a segment of the below Formula (I): wherein:
each of the oxygen atoms depicted in Formula (I) is present in an ether or ester linkage;each R1 is independently an atom or group having an atomic weight of from at least 15 Daltons to less than 500 Daltons and that is a halogen atom, a carbon-containing group, or a sulfur-containing group, and wherein one or both depicted phenylene groups include an R1 group located at an ortho ring position, relative to a depicted oxygen atom, that is a methyl group;v is independently 1 to 4;w is 4;R2 is —CH2—;n is 1;t is 1; andtwo or more R1 groups can join to form one or more cyclic groups; and wherein the coating composition is substantially free of mobile and bound bisphenol A, bisphenol F, bisphenol S, polyhydric phenols having estrogenic activity greater than or equal to that of bisphenol S, and epoxides thereof.