Huber Onyx Elite® 339 Aluminum Hydroxide

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Huber Onyx Elite® 339 Aluminum Hydroxide
Categories:	Ceramic; Oxide; Aluminum Oxide; Other Engineering Material; Additive/Filler for Polymer
Material Notes:	Onyx Elite® 339 is a high-purity, organic free Alumina Trihydrate designed to provide the translucency, depth of pattern and soft white color that are so important to the cast polymer industry. The product is designed to have a unique particle size distribution that provides an optimal combination of viscosity and air release for cast polymer processing. Control of the coarse fraction top size with a large fine fraction affords rapid dispersion in resin, excellent mold flow and wet-out characteristics that result in minimal porosity, uniformity of pigmentation and excellent reinforcement throughout the fabricated part. Onyx Elite® 339 is a color controlled, high purity, low surface area, medium particle size flame retardant and smoke suppressant material. Information provided by J.M. Huber Corporation
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Physical Properties	Original Value	Comments

Specific Gravity	2.42 g/cc
Bulk Density	0.850 g/cc	loose
	1.35 g/cc	packed
Moisture Absorption	0.200 % @Temperature 105 °C	Free
Particle Size	16 µm	Median Particle Diameter
Particle Mesh Size	325 Mesh	24% on
	325 Mesh	75% through
Specific Surface Area	1.3 m²/g	BET

Component Elements Properties	Original Value	Comments
Fe2O3	0.0040 %
Loss on Ignition(%)	34.6 % @Temperature 1000 °C
Na2O	0.045 %	soluble
	0.20 %	total
SiO2	0.0080 %

Descriptive Properties
Al(OH)₃ (%)	99.6
Color	90 L
Functionality	Lower Surface Area
	Smoke Suppression
Functionality: Mechanical hardness	Reinforcement
Functionality: Optical effects	High Brightness / Transparency
Market/Application: Thermosets	Solid Surface/Cast Polymer

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EHUBER761 / 300867

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