Huber Hydral® 7 Aluminum Hydroxide

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Huber Hydral® 7 Aluminum Hydroxide
Categories:	Ceramic; Oxide; Aluminum Oxide; Other Engineering Material; Additive/Filler for Polymer
Material Notes:	Hydral® Coat 7 is a white aluminum trihydroxide Al(OH)3. It is a specially precipitated high-purity white aluminum trihydroxide powder with a brightness value of 99%. It has an extra-fine, uniform median particle size of about 0.7 microns in diameter. Hydral Coat 7 powder is a fully deagglomerated powder. Hydral Coat 7 is halogen-free and finds wide application as a low-smoke, flame-retardant filler in thermoset and thermoplastic materials. It improves arc-track resistance in many plastics used in electrical applications. As a reinforcing pigment in adhesives and adhesive tapes, Hydral Coat 7 improves cold flow properties, maintains the neutrality or alkalinity of the composition, and increases cohesion. Information provided by J.M. Huber Corporation
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Physical Properties	Original Value	Comments

Bulk Density	0.380 g/cc	Loose; Modified ASTM B212-89
	0.530 g/cc	Packed; Modified ASTM B527-85
Brightness	99.2 %	Z value of the XYZ Tristimulus divided by 1.18103
Particle Size	<= 10 µm	0.35, Sedigraph 5100
	<= 50 µm	0.7, Sedigraph 5100
	<= 95 µm	1.6, Sedigraph 5100
Particle Mesh Size	325 Mesh	0.003%, Wet Screen
Specific Surface Area	8.6 m²/g	BET Nitrogen Adsorption

Mechanical Properties	Original Value	Comments
Hardness, Mohs	3.0

Electrical Properties	Original Value	Comments
Electrical Resistivity	>= 5000 ohm-cm	10% in water; Modified ISO787-14

Optical Properties	Original Value	Comments
Refractive Index	1.57

Component Elements Properties	Original Value	Comments
Fe2O3	0.0060 %	DC Arc Optical Emissions Spectrometry
Free Water	0.38 %	Microwave
Na2O	0.040 %	soluble, Flame Emissions Photometry
	0.24 %	total, DC Arc Optical Emissions Spectrometry
SiO2	0.0050 %	DC Arc Optical Emissions Spectrometry

Descriptive Properties
Al(OH)₃ (%)	99.6
Functionality	Fire Retardancy
Functionality: Mechanical hardness	Reinforcement
Market/Application: Thermoplastics	Yes
Market/Application: Thermosets	Rubber & Plastics
Market/Application: Wire and Cable	Wire & Cable Insulation - Halogen-Free

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EHUBER706 / 300812

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