Studies on Melamine Resin.

Some Properties of Methylated Methlyolmelamine having Different Methylolation Degree and the Application for the Water Soluble Alkyd Resin Paint

Abstract

With regard to the methylated methylolmelamine produced by the reaction of methylolmelamine having different methylolation degree (tri-, tetra-, and hexa-methylolmelamine) with methanol catalyzed by an acid, the analyses of the functional groups, the solubility into various solvents, and the thermal property were investigated ; then its reaction mechanism was proposed.
Next, the water soluble alkyd resin paint by the use of the methylated methylolmelamine as a cross-linking agent was investigated. As a main result, it was found that the increase of the viscosity decreases markebly, and the storage stability increases remarkably with increasing methylolation degree ; moreover, the effect of the solvents upon the increase of the viscosity, and the effect of the methylolation degree upon the hardness and flexibility after baking were tested.