Process for the preparation of powder coating composition
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsTsuyoshi Isozaki, Masahiro Kurokawa
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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.
Claims6
A process for the preparation of a powder coating composition, comprising the steps of:
- copolymerizing 5-90% by weight of at least one compound selected from the group consisting of glycidyl group-containing unsaturated compounds and methylglycidyl group-containing unsaturated compounds with 95-10% by weight of an ethylenically unsaturated monomer in methanol to obtain a resin solution;
- feeding said resin solution to an extruder having a die and a plurality of vent ports;
- while removing volatile matters existing in said resin solution in said extruder from said extruder through said vent ports, extruding said resin solution through said die to obtain extrudates;
- and
- pulverizing said extrudates.
Dependencies are inferred from the claim text.