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US 5,472,649 AGranted
Method for preparing powder coating compositions having improved particle properties
AssigneeEastman Chemical Company
InventorsYeong-Ho Chang, Joseph C. Jernigan, Lanney C. Treece
Life of this patent
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Abstract
A method of preparing a powder coating composition comprises: (a) forming a mixture comprising solid particles which include a curable resin and a cross-linking agent that is reactive with the curable resin suspended in an aqueous liquid phase comprising water, a surfactant, a stabilizer, and a promoter; (b) warming the mixture to a temperature sufficient to effect reshaping and rounding of the particles; (c) separating the particles from the liquid phase; and (d) drying the particles to form a powder.
Claims23
A method of preparing a powder coating composition that comprises:
- (a) forming a mixture comprising solid particles which include a curable resin and a cross-linking agent that is reactive with said curable resin suspended in an aqueous liquid phase comprising water, a surfactant, a stabilizer, and a promoter;
- (b) warming said mixture to a temperature sufficient to effect reshaping and rounding of said particles;
- (c) separating said particles from said aqueous liquid phase;
- and
- (d) drying said particles to form a powder.
2 more elements
Dependencies are inferred from the claim text.