A polyester resin for powder coating, and a method for preparing and using the same
By optimizing the composition and preparation process of polyester resin for powder coatings, the problems of high coating brittleness, poor impact resistance, and yellowing in the existing technology have been solved, resulting in a polyester resin with high impact resistance, yellowing resistance, and good workability, which is suitable for the preparation of powder coatings.
Patent Information
- Application Number
- CN202610643658.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing polyester resins for powder coatings do not crosslink sufficiently under low-temperature curing conditions, resulting in brittle coatings with poor impact resistance and yellowing issues. It is difficult to achieve a balance between excellent impact resistance, yellowing resistance, and high crosslinking density.
A transparent amorphous structure is formed by using neopentyl glycol, 2-methyl-1,3-propanediol, 1,4-cyclohexanediol and 1,6-hexanediol polyols combined with trimellitic anhydride and pyromellitic dianhydride acid hydrolysants, using organotin catalysts and triphenylethylphosphine bromide curing accelerators, and adding antioxidants, and controlling the branching degree and acid value of the resin through specific processes.
It improves the coating's impact resistance, yellowing resistance, and crosslinking density, enhances the coating's flexibility and leveling properties, and ensures good workability and storage stability.
Smart Images
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