Fabrication and characterization of corrosion resistant vinyl sulfone reactive dye-encapsulated colored aluminum pigment composites

A novel waterborne aluminum pigment with bright color and excellent corrosion resistance was prepared. The aluminum pigment encapsulation carries out by vinyl sulfone reactive dye after introducing a vinyl-modified layer on the surface. As a typical vinyl sulfone reactive dye, C.I. Reactive Blue 19 (RB-19) can wrap flake aluminum powder and make its surface rich in hydrophilic groups. And the sulfonic acid group of RB-19 also makes it have favorable dispersibility in water. Furthermore, the coating layer composed of vinyl trimethox-ysilane (VTMS) and vinyl sulfone reactive dyes can eliminate the hydrogen evolution phenomenon when they are immersed in strongly alkaline solution (5 wt %). This study provides a new strategy for the research of color aluminum pigment.