Talking About The Synthesis Of Melamine

The melamine meal belongs to the polymer, the English abbreviation is MF, and its monomers are formaldehyde and melamine. In the reaction, a 37% formaldehyde aqueous solution was used. The molar ratio of the two monomers, formaldehyde and melamine, was 2 to 3. The study indicated that following the addition of formaldehyde, a small amount of formaldehyde was added, but it was very simple. Changing the amount of formaldehyde can produce melamine resins obtained from different methylolmelamines. When the pH of the reaction system is 8.5, the side reaction Less, simple response control; high temperature, fast response speed, little effect on formaldehyde reaction in the range of 54 ~ 80 ℃.

The first step of the Melamine tableware series reaction is to generate different numbers of N-methylol substitutes, and then further shrink them into linear resins. Generally speaking, the response conditions are different, and the molecular weight of the product is also different, from water-soluble to hardly water-soluble, and even to insoluble and infusible solids. Melamine resins do not cure at room temperature, and usually require thermal curing at 130 ~ 150 ° C. The study indicated that adding a small amount of acid as a catalyst during curing can increase the curing rate. The cured melamine formaldehyde resin is colorless and bright, stable in boiling water, and can even be used at high temperatures of 150 ° C. It has self-extinguishing properties, arc resistance and outstanding mechanical properties.