The monomeric form hexamethylolmelamine and the MF resins are very versatile crosslinking agents for a wide variety of polymeric materials both water- and solventborne. To improve the solubility in solvents, melamine formaldehyde (MF) resins, and the monomeric forms are often etherified with alkohols such as methanol and n-butanol. After acidification, they readily react with thiol, hydroxyl, carboxyl and amide groups to form three-dimensional thermoset polymer networks. The relative reaction rate for these functional groups follows the order of - SH > - OH > - CONH2 > - COOH