Patent Number: 6,309,572

Title: Process for the preparation of powder coating composition

Abstract: A process for the preparation of a powder coating composition, wherein 5-90% by weight of at least one monomeric compound selected from glycidyl group-containing unsaturated compounds and methylglycidyl group-containing unsaturated compounds is copolymerized with 95-10% by weight of an ethylenically unsaturated monomer in methanol to obtain a resin solution. The resin solution is spray-dried to obtain a powdery resin. Alternatively, the resin solution is fed to an extruder having a die and a plurality of vent ports and extruded through the die, while removing volatile matters through the vent ports, to obtain extrudates. The extrudates are pulverized to obtain a powdery resin.

Inventors: Isozaki; Tsuyoshi (Hiratsuka, JP), Kurokawa; Masahiro (Hiratsuka, JP)

Assignee: Mitsubishi Gas Chemical Company, Inc.

International Classification: C08F 220/00 (20060101); C08F 220/32 (20060101); C09D 133/06 (20060101); B29C 047/76 ()

Expiration Date: 10/30/2018