continuous process for manufacture of methylolmelaminen and their use for the production of hochveretherten melaminharzen

摘要

The object of the present invention is a novel continuous process for the production of methylol melamines, especially of hexamethylol melamine and of a mixture of higher methylol melamines, wherein a continuous synthesis from a formaldehyde solution and melamine is combined with a continuous drying of the resulting product mixture, whereby a product in the form of a powdery material with a low content of free formaldehyde and water is obtained. ??Simultaneously, the invention also relates to a process for the production of highly etherified melamine resins based on hexamethylol melamine produced by a process according to the present invention and to the use of hexamethylol melamine produced by a process according to the present invention in a process of the production of highly etherified melamine resins. Particularly, the invention relates to a process of the production of hexamethoxymethylol melamine (HMMM), hexabutoxymethylol melamine (HBMM) and mixed ethers of C1-C5 alkohols on the basis of hexamethylol melamine produced by a process according to the invention.