PASSIVATED AQUEOUS METAL PIGMENT COMPOSITIONS AND PROCESS FOR MAKING SAME

摘要

A process for producing aesthetically acceptable metal pigment-containing composition useful for forming aqueous coating compositions, includes the steps of passivating milled metal pigment particles with an inorganic chromium or vanadium compounds, washing the passivated particles with water, further washing the particles with a mixture of a lubricant dissolved in a cosolvent, and adjusting the non-volatile content of the resulting product to form a moist paste. The particles are maintained in at least a moist condition during the process. The particles produced are substantially free from agglomeration.