PARTICLES AND PROCESS FOR CORROSION- AND CREEP-RESISTANT COATINGS

摘要

This invention concerns particulate polymeric compositions that impart desirable properties to metal substrates coated with such particles, for instance by electrostatic spraying or fluidized bed application. The properties include corrosion and creep resistance which are designed into the composition by careful control of the following composition variables: selection of either an acid-functionalized semicrystalline or acid-functionalized amorphous polymer component, concentration of acid functionality of the polymer component, and degree of cross-linking of the acid functionality. Also disclosed are methods for producing such compositions and coatings; multilayer self-supporting and substrate-supported coatings with exceptional bonding between layers and the method for producing them; hardened coatings and methods for producing them by neutralizing the acid functionality of the polymer component. Coated substrates are also disclosed as are particulate compositions containing anticorrosive pigments.