一种低成本高硬度粉末涂料用聚酯树脂及其制备方法
By preparing a low-acid-value, high-functionality polyester resin and combining it with PT910 curing agent, the problems of poor storage stability and low hardness of the PT910 curing agent system were solved, realizing a low-cost, high-hardness powder coating with good storage stability and film hardness. This reduced the cost of powder coatings and utilized HAA byproducts, providing a high-value-added utilization pathway.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI HENGLONG NEW MATERIALS CO LTD
- Filing Date
- 2024-07-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing PT910 curing agent system powder coatings suffer from poor storage stability, low hardness, and high cost, making it difficult to develop low-cost, high-hardness powder coatings.
A low-acid-value, high-functionality polyester resin was prepared by transesterification and polymerization using raw materials such as 2-methyl-2-propyl-1,3-propanediol, ethylene glycol, HAA byproducts, terephthalic acid, trimellitic acid, 2-ethyl-1,3-hexanediol, and 2,3-naphthalenedicarboxylic anhydride. This resin was then formulated with PT910 curing agent to form a low-cost, high-hardness powder coating.
It achieves low-cost, high-hardness powder coatings with good storage stability and a film hardness of 3H or higher, exhibiting excellent overall performance. It reduces the amount of PT910 curing agent used, thereby lowering the cost of powder coatings, and utilizes HAA byproducts, providing a high-value-added utilization pathway.
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