Evonik ULTRASIL® 800 Silica

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Evonik ULTRASIL® 800 Silica
Categories:	Other Engineering Material; Additive/Filler for Polymer
Material Notes:	ULTRASIL® 800 is a precipitated silica with a Calcium admixture and a very low specific BET surface area of approximately 35 m2/g. Properties and applications: ULTRASIL® 800 has medium reinforcing potential. It imparts excellent compression set and extrusion properties to rubber compounds. ULTRASIL® 800 thus allows the production of profiles with low die swell and very smooth surface. Even EPDM compounds with extremely high filler loading can still easily be processed. In white compounds ULTRASIL® 800 can be used as a partial replacement for titanium dioxide. Sulfur cure is only marginally affected. Application fields are: Mechanical rubber goods. CAS No: 1344-95-2 Information provided by Evonik
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Physical Properties	Original Value	Comments

Density	0.260 g/cc	Tamped; ISO 787-11
Particle Size	45 µm	<0.15% sieve residue; ISO 787-18
pH	10.5	5% in water; ISO 787-9
Specific Surface Area	35 m²/g	ISO 9277

Chemical Properties	Original Value	Comments
Ionic Impurities - Fe (Iron)	<= 400 ppm

Component Elements Properties	Original Value	Comments
Calcium, Ca	6.5 %
Chlorine, Cl	<= 1.0 %
Loss on Ignition(%)	<= 10.5 % @Temperature 1000 °C, Time 7200 sec	ISO 3262-1
SiO2	>= 87 %	based on ignited substance (2 h/1000°C); ISO 2152-19
Sodium, Na	<= 2.0 %

Descriptive Properties
Loss on drying	0.055	2 hrs at 105°C, ISO 787-2

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PEVONIN014 / 317048

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