| 摘要 |
A method of preparing a homogeneous thermosetting powder paint composition which cures to form a coating exhibiting outstanding exterior durability, adhesion, impact strength and, in particular, color match. The method comprises: introducing a liquid paint composition including at least a cross-linkable copolymer and a uniformly dispersed pigment into an evaporating zone adapted to heat said liquid paint so as to evaporate the inert solvent contained therein, passing the liquid paint into a separating zone; causing said solvent vapor to be removed; removing the non-volatile components of said paint in a molten state; cooling said non-volatile components; granulating said non-volatile components to form particles; blending a cross-linking agent for said copolymer with said powder; mixing said blend at a temperature greater than the melting point of said powder and said cross-linking agent but below the point at which cross-linking occurs so to form a molten mass having cross-linking agent uniformly dispersed therein; cooling said molten mass to form a solid material; and pulverizing to form a powder paint.
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