chemical structure for MCA


Melamine Cyanurate

CAS Number: 37640-57-6;
EC Number: 253-575-7;
Chemical formula: C3H6N6·C3H3N3O3; C6H9N9O3;
Molecular weight: 255.2
1,3,5-triazine-2,4,6-triamine is chemical name of Melamine.

1,3,5-Triazine-2,4,6(1H,3H,5H)-trione, compd. with1,3,5-triazine-2,4,6-triamine (1:1);

Other melamine-based nitrogen Flame Retardants:

Melamine Cyanurate(MCA) is a halogen-free nitrogen-based (triazine melamine-based) flame retardant, especially used for unfilled polyamide (PA6, PA66).

MCA are widely used in nylon (PolyAmide, PA), TPU, PBT, PET, EVA, epoxy resin, rubber, phenolic resin, polystyrene, acrylic emulsion, PTFE resin and other olefin resin.

MCA can be applied to materials and parts with high requirements for flame retardant insulation grade, wire and cable, electronic appliances, building materials, textile coatings.

MCA can be used as a lubricant with better lubricating properties than molybdenum disulfide, but it is cost-effective. MCA’s coating film can be used as a lubricant film for rust prevention, as a release agent for steel drawing and stamping, and as a lubricant film for general mechanical transmission parts.

MCA has non-toxicity, good lubricity, can be formulated for skin cosmetics, and can also be used as paint matting agent.

1. Environmental. Halogen-free, low smoke concentration, low corrosiveness.
2. Good electrical and mechanical property.
3. Good thermal stability. Low heat loss when heated for a long period of time at 300°C. Decomposition temperature of Melamine salts is high, > 300°C.
4. Steady color.

Technical Data:

AppearanceWhite Powder
MCA content [%]99.5 min.
Cyanuric acid [%]0.2 max.
Loss on dry [%]0.2 max.
Average particle size [μm]5.0 max.
(or according to requirement)
Melamine Cyanurate

Flame retardant mechanisms:
1, MCA flame retardant, more than 330℃, began to decompose to generate MA and CA, this process needs to absorb heat from the polymer to reduce the surface temperature of the substrate.

2, CA and MA further decomposition to generate non-combustible gases, such as ammonia, etc., these non-flammable gases can quickly dilute the polymer generated combustibles and oxygen, reducing the concentration of combustible gases.

3, MCA compounded with char-forming substance (containing phosphorus, etc.), non-flammable gases will promote the foaming and expansion of the carbonised layer, and can prevent the convection of heat and outside oxygen.

4, Non-combustible drips, minimize contact with flames.

Package and transportation:
20kg/25kg/50kg per bag.
Handle with care, keep airtight and dry. Non-toxic, but pay attention to the protection of the fine powder.

Related Flame Retardants (FRs)

>>Halogen-free Aromatic PolyPhosphate FRs:
For Engineering plastics (e.g. PC/ABS alloys, PC, ABS, modified PPE), etc.
>>Halogenated Chlorinated Phosphate FRs:
For Polyurethanes (e.g. flexible and rigid PUR foams), etc.
>>Melamine-based nitrogen-phosphorus FRs:
Melamine Phosphate -MP
Melamine PolyPhosphate -MPP

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