| 摘要 |
<p>Powder coating composition comprising 4 to 20% by weight of a hexamethylolmelamine derivative and 96 to 80% by weight of a polyester having a softening point of 65 DEG to 130 DEG C, an acid value of 5 to 20 and an excess hydroxyl percentage of 5 to 30%, said hexamethylolmelamine derivative being at least one of etherified products of hexamethylolmelamine, the average total number of the CH3O- and RO- groups being 5.5 to 6.0 per melamine nucleus, the average number of the RO- group being 0.5 to 3.0 permelamine nucleus, wherein RO is R'' ¦ R'OCHCH2O- group or CH2-CH2 CH2 ANGLE ANGLE CH-O- CH2-CH2 group, R' being an alkyl group having 1 to 4 carbon atoms and R'' being hydrogen atom or methyl group.</p> |
