Powder coating of polyepoxide or beta-hydroxyalkylamide, acid resin, polycarboxylic acid and 3° or 4° nitrogen source

摘要

A powdered coating composition comprises a thermosetting resin which consists of two components. The first component includes an acid reactive material comprising a polyepoxide or beta-hydroxyalkylamide compound. The second component is an acid terminated resin which reacts with the first component. A curing agent including a polycarboxylic acid having a functionality of at least 3 and a source of tertiary or quanternary nitrogen is present to react with an excess of the first component, thereby curing thermosetting resin.