MCA (Melamine Cyanurate)

MCA, or Melamine Cyanurate, is a halogen-free nitrogen-based flame retardant for nylon, especially PA6 and PA66. It is a white powder that is non-toxic, odorless, smooth to the touch, insoluble in water and most organic solvents.

Key Features

Low application cost with favorable electrical, mechanical and coloring properties.
MCA: D50 ≤ 2 μm; D98 ≤ 8 μm.
MC15: D50 ≤ 2.5 μm; D98 ≤ 15 μm.
MC25: D50 ≤ 4 μm; D98 ≤ 25 μm.
MC50: D50 ≤ 4 μm; D98 ≤ 50 μm.

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APPLICATIONS

MCA is used as a halogen-free flame retardant for nylon, particularly pure PA6 and PA66 systems. Based on the provided information, the recommended formulation can achieve a UL 94 V-0 flame-retardant rating. Formulations and processing conditions should be adjusted according to the actual requirements of each manufacturer.

QUALITY STANDARD

Item	Unit	Standard
Melamine Cyanurate	%	≥99.5
Residual Cyanuric Acid	%	≤0.2
Residual Melamine	%	≤0.3
Whiteness	—	≥96
Volatile Matter	%	≤0.2
pH Value	—	5-7
Specific Gravity	g/cm³	1.7
Bulk Density	g/cm³	0.3-0.4
Water Solubility	g/100 ml water	0.002 at 20°C

RECOMMENDED APPLICATION IN NYLON

Base Resin	Base Resin Ratio	Flame Retardant	Flame Retardant Ratio
PA6	88-90%	MCA	12-10%
PA66	90-92%	MCA	8-10%

The above is a recommended formulation for reference only. Manufacturers should adjust the formulation or add additives according to the actual processing requirements.

EXTRUSION DATA

Material	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5	Zone 6	Zone 7	Zone 8	Zone 9
PA6	235	240	240	240	240	245	245	245	245
PA66	250	260	260	260	260	260	260	265	265

Temperature unit: °C. Zone 8 is the vacuum zone; Zone 9 is the discharge zone. The above data is for reference only.