MoldX® A400 is a third generation optimized Alumina Trihydrate (ATH) product that gives low viscosity at a high loading level (250-380 phr), but requires 20-30% less loading than MoldX® A110 to achieve the same flame retardant performance.MoldX® A400 optimized ATH is particularly well-suited for SMC, and it can also provide low cost flame retardancy and smoke suppression in other thermoset processes such as: epoxy potting, wet-mat, spray-up, hand lay-up, and bulk molding compounds (BMC) that contain reinforcing fibers (patent pending).

Functions: Flame Retardant

Chemical Family: Aluminum Compounds

Flame Rating: UL 94 5VA, UL 94 V0

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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Composite Materials Functions
CAS No.
21645-51-2
EC No.
244-492-7

Features & Benefits

Applications & Uses

Composites Processing Methods

Properties

Flame Rating
Chemical Properties
ValueUnitsTest Method / Conditions
Al(OH)₃99.6%
Fe₂O₃0.007%
Loss on Ignition at 1000°C34.6%-
Na₂O (Soluble)0.025%
Na₂O (Total)0.2%
SiO₂0.005%
Typical Properties
ValueUnitsTest Method / Conditions
Bulk Density (Loose)0.85g/cm³
Bulk Density (Packed)1.35g/cm³
Free Moisture at 105°C0.2%-
Specific Gravity2.42--
Surface Area1.4m²/gm-
Particle Size Distribution
ValueUnitsTest Method / Conditions
Median Particle Diameter10.0μm-
Screen Analysis < 10 micron50.0%-
Screen Analysis through 325 mesh80.0%-

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Performance

For SMC, BMC, Hand Lay-Up, Epoxy and Polyurethane Applications:

MoldX A400 is Huber’s highest performing optimized ATH grade. It is engineered to impart outstanding fire retardance and smoke suppression in fiberglass reinforced SMC without halogen additives. Formulations have better mechanical properties because less MoldX A400 is needed to pass the same flame retardant certifications that would be required of competitive ATH grades.

 

MoldX® A400 - Performance

 

Above is the rate of heat release and of smoke production for cured composite panels made via the sheet molding process with the ATH loading level at 350 phr. The panels were 0.100 inches thick. MoldX® A400 optimized ATH easily outperforms competitive ATH products in the critical areas of flammability and smoke suppression.