| 摘要 |
<p>The invention concerns powdered thermosetting compositions for coatings, which comprise a carboxylic acid group containing polyester composed of a polyacid constituent comprising from 80 to 100 % mole of isophthalic acid and from 0 to 20% mole of another linear or branched aliphatic polyacid or aromatic polyacid, and of a polyol constituent comprising from 10 to 60% mole of neopentyl glycol hydroxypivalate, from 40 to 90% mole of neopentyl glycol and from 0 to 30% mole and preferably from 0 to 20% mole of another aliphatic and/or cycloaliphatic polyol. The cross-linking agent for the polyester is an epoxy group containing compound. The coatings obtained with these powders are very smooth, without pinholes nor other defects and exhibit excellent outdoor durability and flexibility.</p> |
