| 摘要 |
<p>The present invention relates to a powder coating composition for low temperature cure which comprises a mixture of a carboxylic acid group containing first polyester; at least one of a second polyester having a glass transition temperature ‰¤ 45°C and/or a crystalline polycarboxylic acid; a glycidyl group containing acrylic copolymer; a further compound and/ or resin having functional groups reactable with the carboxylic acid groups; and a thermosetting curing catalyst. These thermosetting powder coatings are designed for coating heat-sensitive substrates such as wood, fibre board and other materials which can not withstand the excessive heat/time conditions necessary to cure traditional coatings. The powder coatings of the invention, when cured at temperatures below 150°C, produce a finish which exhibits a high gloss, smooth surface along with an outstanding hardness and weatherability.</p> |
