Aminoresins

Melamine reacts similarly to produce methylol derivatives, which form the familiar melamine—formaldehyde resins on heating (63) (see Aminoresins). 

The chemistry of melamines and phenoHcs is quite similar. In both cases formaldehyde [50-00-0] is added to the reactive sites on the patent ring to form methylol phenols (3) or methylol melamines (4) (see Phenolresins Aminoresins). There ate six reactive sites on the triazine ring of melamine [108-78-1] (1) so it is possible to form hexamethylolmelamine. However, the most common degree of methylolation is 1.5—2.0. The ortho and para positions of phenol ate active thus phenol can be trimethylolated (2). However, as with melamine, lower degrees of methylolation such as 1.2—2.5 ate... 

In the production of composite plastics based on aminoresins those with the greatest popularity are resins based on carbamide, melamine and their mixtures. These resins are solidifying binders with the highest production volumes. 

Introduced as additives to the compositions based on aminoresins are lubricating substances (Zn, Ca stearates), methanol, dyes [3]. 

In Ref. [6] results of modifying aminoresins with phenol and polyester resins to give them impact resistance, moisture resistance and dimensional stability for applications in electrical engineering. 

The process of preparing compositions based on high-porosity aminoresins that can be used as heat-insulating materials for buildings is reported in Ref. [13]. 

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