| abstract |
PURPOSE: To improve acid resistance, durability, and appearance by compounding a specific acrylic resin, a polyester resin, a melamine resin mixture, an acid catalyst, and a blocked isocyanate. n CONSTITUTION: An acrylic resin comprising 100 pts.wt. acrylic resin (A) having a number average mol.wt. of 2500-10000 and a hydroxyl value of 70-120 and 20-40 pts.wt. styrene (deriv.), a polyester resin (B) having a number-average mol.-wt. 350-1500 and a hydroxyl value of 150-300, a melamine resin mixture (C) contg. an alkyl-etherfied melamine resin having 5 or more alkyl ether groups per triazine ring and a melamine resin having 1.1-3 imino groups per triazine ring in a wt. ratio of the former to the latter melamine resin of 5/5 to 8/2, 0.1-3.0wt.% acid catalyst (D) blocked by an amine boiling at 150-280°C, and a blocked isocyanate (E) are compounded in such wt. ratios that A/B=100/0-60/40, C/E=100/0-33/67, and (A+B)/(C+E)=50/50-85/15. n COPYRIGHT: (C)1992,JPO&Japio |