Melamine, 99.8%

Catalog NumberACMA00023487

CategoryNitrogen Flame Retardant

Molecular Weight	126.12
Molecular Formula	C3H6N6
Purity	≥99.8%
Content	Ash: max. 0.03%
Feature	Available in both high-pressure or low-pressure form. Melamine contains 67% nitrogen by mass and, if mixed with resins, has fire retardant properties due to its release of nitrogen gas when burned or charred. Melamine resin is a synthetic polymer that is fire resistant and heat tolerant. It is a versatile material that has a highly stable structure. Can be easily molded while warm, but will set into a fixed form, which makes it suitable for certain industrial applications.
Moisture Content	max. 0.1%
Packaging	25 kg
pH	7.5 to 9.5

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Case Study

Melamine, Silica and Ionic Liquids as Novel Flame Retardants

Członka, Sylwia, et al. Polymer Testing, 2020, 87, 106511.

A combination of melamine, silica and ionic liquids was successfully used as flame retardants to enhance the flame retardancy and mechanical properties of rigid polyurethane foams. All modified compositions had higher density, greater compressive strength and comparable thermal conductivity compared to unfilled foams. Furthermore, the experiments showed that the presence of only 1 wt% melamine significantly improved the fire performance of PU foams. The peak heat release rate (pHRR) of the composites was significantly reduced by about 84% after the inclusion of this flame retardant combination.
Preparation procedure for modified PU foams
· PU foams were created using a two-component system consisting of polyol and isocyanate. Three series of modified PU foams were produced. The first series incorporated melamine at concentrations of 1, 5, and 10 wt.%. The second series was enhanced with both melamine and silica (0.1 wt.%), while the third series received additional reinforcement from the ionic liquid [EMIM]Cl at a concentration of 0.3 wt.%.
· All PU foams were manufactured in a plastic container. The designated amount of fillers (melamine/silica/IL) was added to Izopianol 30/10/C, and this mixture (designated as component A) was stirred at 800 RPM for 60 seconds. Subsequently, component B, Purocyn B, was introduced to component A, and the combined formulation was mixed at 2000 RPM for 10 seconds. The resulting PU mixture was then poured into an open mold, allowing for free expansion in a vertical direction.

Melamine-Modified Graphene Oxide for Flame Retardancy Enhancement of Polypropylene

Yuan, Bihe, et al. Journal of materials science, 2015, 50, 5389-5401.

Graphene oxide (GO) was modified with melamine (MA) through strong π-π interactions, hydrogen bonding, and electrostatic attraction. Polypropylene (PP) composites were fabricated via melt compounding, with in-situ thermal reduction of GO/functionalized graphene oxide (FGO) during processing. FGO/PP nanocomposites exhibited superior thermal stability and flame retardancy compared to GO-based counterparts. During thermal decomposition, intercalated MA condensed into graphitic carbon nitride (g-C3N4) within the confined micro-zones created by GO nanosheets. This in-situ formed g-C3N4 provided a protective layer to graphene, enhancing its barrier effect.
Preparation of FGO/PP Composites
· GO was synthesized via modified Hummers' method. 0.6 g of GO was dispersed in 600 mL of deionized water and sonicated for 30 minutes. Subsequently, 3 g of MA was added to the GO dispersion and stirred at 60°C for 10 hours. The resulting FGO was centrifuged, washed, and dried at 60°C for 24 hours.
· PP composites were prepared through melt mixing in a twin-roller mill. Maintaining a 5 wt% loading of maleic anhydridegrafted polypropylene (MAPP) across all samples, the resin was dried at 80°C for 12 hours. Nanofillers and resin were mixed at 185°C for 12 minutes at a roller speed of 50 rpm. PP composites containing 0.5, 1.0, and 2.0 wt% FGO were designated as 0.5 FGO/PP, 1 FGO/PP, and 2 FGO/PP, respectively.

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