Hexamethylol melamine

The curing reaction can be performed by a polyisocyanate and the hexamethylol melamine. 

The reactions of melamine (the structure of which is shown in Scheme 1.16) are similar to those of urea except that there are three amino groups per molecule, so it is hexafunctional with respect to formaldehyde and it is possible to separate the different reaction products with formaldehyde up to hexamethylol melamine. The crosslinking reactions are identical to those of urea-formaldehyde resins. 

Beilstein Handbook Reference) A13-26869 BRN 0356813 EINECS 221-422-3 Hexa(meth-oxymethyl)melamine Hexakis(methoxy-methyl)-s-triaz-ir e-2,4,5-triamine Hexamethyi methyl-olmelamine Hexamethyloi-melamin-hexa-methyiather Hexamethylol-melamine hexamethyi ether LK 36 Malamine, hexakis(methoxymethyl) Pidifix 330 TLF-3617,... 

Melamine (MF) resins (Cymel, Melmac, Resimene) are produced by the formylation of melamine (2,4,6-triamino-1,3,5-triazine). Melamine has six active hydrogen atoms and hence forms mono-, di , tri-, tetra-, penta-, and hexamethylol melamines. The methylol derivatives may be etherified with alcohols such as 1-butanol. A hexamethyl ether (hexamethoxymethylmela-mine) is commercially available and may be used as an intermediate. Some of the reactions leading to resinification of melamine are shown in Figure 15.6. 

Chem. Descrip. Stabilized hexamethylol melamine resin CAS 531-18-0... 

Triazine-2,4,6-triyltrinitrilo) hexakis methanol. See Hexamethylol melamine resin... 

Hexahydro-1,3,5-tris (hydroxyethyl) triazine Hexahydro-1,3,5-tris-(2-hydroxyethyl)-s-triazine. See Hydroxyethyl-s-triazine Hexahydroxycyclohexane. See Inositol Hexahydroxylene Hexahydro-m-xylene. See 1,3-Dimethylcyclohexane Hexahydro-o-xylene. See 1,2-Dimethylcyclohexane Hexahydro-p-xylene. See 1,4-Dimethylcyclohexane Hexa (hydroxymethyl) melamine. See Hexamethylol melamine resin Hexakis (dihydrogen phosphate) myo-inositol. See Inositol-hexaphosphoric acid Hexakis (dihydrogen phosphate) myo-inositol sodium salt. See Sodium phytate Hexakis (hydroxymethyl) melamine Hexakis (hydroxymethyl) 1,3,5-triazine-2,4,6-triamine. See Hexamethylol melamine resin Hexakis (methoxymethyl) melamine Hexakis (methoxymethyl)-s-triazine-2,4,6-triamine. See Hexamethoxymethylmelamine Hexakose. See 2,4-Hexadienol 5-Hexalactone... 

Triazi ne-2,4,6-triyItri nitri Io) hexakis methanol. See Hexamethylol melamine resin 1,1, 1 -s-Triazine-2,4,6-triyltrisaziridine. See Triethylenemelamine... 

Hexamethylol melamine resin 531-26-0 Eugenyl benzoate 531-75-9 Esculin 531-85-1... 

Chemical characteristics. Both resins will react with formaldehyde to initiate and form monomeric addition products. Six molecules of formaldehyde added to one single molecule of melamine will form hexamethylol melamine, whereas a single molecule of urea will combine with two molecules of formaldehyde to form dimethylolurea. If carried on further, these condensation reactions produce an infusible polymer network. The urea/formaldehyde and melamine/formalde-hyde reactions are illustrated in Fig. 2.2. 

Urea/formaldehyde (UF) or melamine/formaldehyde (MF) thermoset resins are also formed via the initial addition of HCHO to form methylol derivatives (dimethylol urea and hexamethylol melamine). Curing or cross-linking with acids yields thermoset polymers. 

Fully methylated hexamethylol melamines, which are extensively used in waterborne metal coatings, have the generalised structure shown in Figure 7-21. 

Figure 7-21 Structure of Methylated Hexamethylol Melamine Resins suitable for metal protection formulations include ...

Hexamethylol melamine (HMM) was characterised by FTIR spectroscopy. The optimum dose of HMM in the presence of a sulphur accelerator in a NR-filled compound was determined. The cure rate and kinetics of crosslink formation indicated that HMM enhanced the first-order rate of vulcanisation in an NR compound. The results revealed good mechanical properties of an HMM-based NR carbon black-filled vulcanisate. 15 refs. 

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