Resin-coated metal pigment, and process for producing same

摘要

Disclosed is a resin-coated metal pigment comprising 100 parts by weight of a metal pigment and 0.1 to 50 parts by weight of a resin, wherein the resin is attached on the surface of the metal pigment. The resin-coated metal pigment is produced by circulating a portion of a slurry solution containing the metal pigment in an external-circulation type vessel during the resin coating treatment in a reaction vessel and applying a vibration to the external-circulation type vessel with an ultrasonic wave.

主权项

1. A resin-coated metal pigment, wherein a proportion between (A) the number of particles contained in aggregates formed from two or more primary particles and (B) the number of primary particles which are not aggregated, B/(A+B), in the resin-coated metal pigment, is 0.3 to 1,
wherein the metal pigment is a scaly aluminum pigment, and wherein a measured value of the 60-degree gloss of a coated plate obtained by applying a paint containing said resin-coated metal pigment to an acrylic resin plate is represented by G′; a measured value of the 60-degree gloss of a coated plate similarly prepared using an aluminum powder that is not coated with a resin is represented by G; and a gloss retention R is determined by the following formula: R=(G′/G)×100; and the gloss retention R is 70 or more.