Hexa melamine

Tire Cord. Melamine resins are also used to improve the adhesion of mbber to reinforcing cord in tires. Textile cord is normally coated with a latex dip solution composed of a vinylpyridine—styrene—butadiene latex mbber containing resorcinol—formaldehyde resin.. The dip coat is cured prior to use. The dip coat improves the adhesion of the textile cord to mbber. Further improvement in adhesion is provided by adding resorcinol and hexa(methoxymethyl) melamine [3089-11 -0] (HMMM) to the mbber compound which is in contact with the textile cord. The HMMM resin and resorcinol cross-link during mbber vulcanization and cure to form an interpenetrating polymer within the mbber matrix which strengthens or reinforces the mbber and increases adhesion to the textile cord. Brass-coated steel cord is also widely used in tires for reinforcement. Steel belts and bead wire are common apphcations. Again, HMMM resins and resorcinol [108-46-3] are used in the mbber compound which is in contact with the steel cord to reinforce the mbber and increase the adhesion of the mbber to the steel cord. This use of melamine resins is described in the patent Hterature (49). 

Urea and melamine are tetra- and hexa-functional molecules. However, the formation of a network polymer is prevented by adding alcohols such as w-butanol and by condensing with formaldehyde at low temperatures under basic conditions. While phenol resins have better moisture and weather resistance than urea resins, the latter are preferred for light-colored... 

Cyanuramide, Melamine or 2,4,6-Triamine-sym triazine (called Cyanuramid Melamin Isomelamin 2,4,6 Triimino-- 1.3,5 - Triazinj or 2, 4. 6 -Triimino-hexa-hydro 1,3. 5 Triazin in Ger),... 

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

FIGURE 4.3. Molecular structures and schematic representations of tetra- hexa- and octamelamines 2, 3 and 4, respectively, and di(melamine-cyanurate) 5. The molecular structure of DEB and different isocyanuric acid derivatives (CYA) are also shown. 

HEXA(HYDROXYMETHYL)MELAMINE see HDYOOO HEXAISOBUTYLDraN see HDYIOO HEXAKIS([l-ACETATO)-Il- -OXOTETRABERYLUUM see BFT500... 

Another category of durable hand builders are formaldehyde-containing thermosetting polymers. These products are usually supplied as dispersions or aqueous solutions of precondensates of urea or melamine with formaldehyde, for example di-methylol urea or di- to hexa-methylol melamine and their methyl ethers. The thermosetting polymers are comparatively inexpensive and provide fabrics with stiffness and resilience. However, they have a tendency to reduce abrasion resistance, yellow after exposure to heat, and release formaldehyde. Melamine-based hand builders are more highly crosslinked than urea-based products and are accordingly more durable. Butylated urea condensates are especially useful for rayon fabrics (see also Chapter 5 Easy-care and durable press finishes of cellulosics). 

The acrylic resin used was Rohm and Haas Co.s QR-496 ( 4), so the exact nature of the polymer is not known. It is hydroxy functional, thus requiring an aminoplast for proper cure commercially modified hexa-methylol melamine resin was used for this purpose. During the first part of the investigation the acrylic resin was used without the melamine resin, but for final evaluation it was incorporated to give a more realistic commercial coating system. 

Structure VII is basically the only significant grouping in the hexa(methoxymethyl)melamine (VIII) type of cross-linking agent that is becoming increasingly important commercially. With this resin the chemistry is relatively simple. 

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,... 

L. J. Calbo Effect of Catalyst Structure on the Properties of Coatings Crosslinked with Hexa(methoxymethyl)melamine, J. Coat. Technol. 52 (1980) no. 660, 75-83. 

Hexa (hydroxymethyl) melamine Hexakis (hydroxymethyl) melamine Hexakis (hydroxymethyl) 1,3,5-triazine-2,4,6-triamine. See... 

Synonyms Hexa (hydroxymethyl) melamine Hexakis (hydroxymethyl) melamine Hexakis (hydroxymethyl) 1,3,5-triazine-2,4,6-triamine Hexamethylolmelamine 1,3,5-Triazine-2,4,6-triyltrinitrilo) hexakis methanol l4,6-Tris (bis (hydroxymethyl) amino)-s-triazine Empirical CsHieNeOe Properties M.w. 306.33... 

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... 

The viscoelastic properties of short melamine fiber-reinforced NBR composites were studied by Rajeev et al. [43]. Usage of resorcinol-hexa-siHca bonding system in the composites also causes a significant improvement in the storage and loss modulus values. 

MF resins are produced by first reacting melamine and formaldehyde in the presence of aqueous sodium carbonate. The degree of methylolation depends upon the molar ratio of formaldehyde to melamine. Although methylolation will result in a mixture of partially methylolated derivatives, the reaction is usually carried out to optimize the content of either hexa-methylolmelamine or symmetrieal trimethylolmelamine, as in Figure 18. 

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