ULTRASIL® 7000 GR

Chemical Name: Silica gel pptd. cryst.-free
Chemical Family: Silica

ULTRASIL® 7000 GR is a highly reinforcing silica that has been specifically developed for use in low-rolling-resistance passenger car tire tread compounds, commonly referred to as "Green Tires". This silica has a specific BET surface area of approximately 175 m²/g, and it exhibits excellent incorporation and dispersion behavior. When used in tire tread compounds, it imparts high abrasion resistance, excellent rolling resistance, and improved wet traction.

Properties

Physical Form: Granules
Solid

Product families

Applications

Industrial — Chemical & Industrial Manufacturing

Equipment & Parts
Other Industrial Applications

Product Families

Elastomers — Elastomer Additives

Fillers & Extenders

Other characteristics

Brand: ULTRASIL
Features: Dust-Free, Excellent Traction, Good Abrasion Resistance, Good Processability, High Dispersibility, High Reinforcement, Rolling Resistance, Wet Traction
Functions: Reinforcement
Note: 1) based on original substance 2) based on ignited substance (2 h/1000°C) *) The given data are typical values. Specifications on request.
Markets: Industrial
Appearance: White granule
Shelf LIfe: 2 years
Technology: Elastomers
Labeling Claims: Not Listed In California Proposition 65
Material Features: Dust-Free
Excellent Traction
Good Abrasion Resistance
Good Processability
High Dispersibility
High Reinforcement
Rolling Resistance
Wet Traction
Chemical Description: SiO₂, synthetically produced amorphous silicon dioxide.
Chemical Inventories: AICS (Australia)
DSL (Canada)
EINECS (EU)
ENCS (Japan)
IECSC (China)
KECI (Korea)
NZIoC (New Zealand)
PICCS (Phillipines)
Applications: ULTRASIL® 7000 GR is a mechanically compacted granulate. On account of the granulation process it leads to less dust development during mixing. ULTRASIL* 7000 GR is an easily dispersible and highly reinforcing silica which was especially developed for application in low rolling resistant passenger car tire tread compounds. It imparts to tread compounds high abrasion resistance combined with excellent rolling resistance and wet traction. To achieve these properties it is necessary to use ULTRASIL* 7000 GRand a bifunctional organosilane, such as Si 69°, Si 75°, Si 266° or Si 363. Additionally, the use of diethylene glycol, triethanolamine or other alkaline accelerators might be necessary in order to achieve optimum rubber-technical data. Application fields are: Tires, mechanical rubber goods.
Packaging Information: Our silica products are inert and extremely stable chemically. However, due to their high specific surface area, they can absorb moisture and volatile organic compounds from the surrounding atmosphere. Therefore, we recommend storing the products in sealed containers in a dry, cool place, and removed from volatile organic substances. Even if a product is stored under these conditions, after a longer period it can still pick up ambient moisture over time, which could lead to its exceeding the specified moisture content. For this reason, our recommended use-by date is 24 months after date of manufacture. Product more than 24 months old should be tested for moisture content before use in order to make certain that it is still suitable for the intended application.
Certifications and Compliance: REACH (Europe)
Plastics and Elastomers End Uses: Tires
Plastics and Elastomers Functions: Reinforcement

Technical data

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Characteristic	Value	Unit	Method
Manganese Content¹	max. 6	ppm	Internal Method
Copper Content¹	max. 6	ppm	Internal Method
Iron Content¹	max. 400	ppm	Internal Method
SiO₂ Content²	min. 97	%	ISO 3262-19
SA Ro-Tap (< 75 µm)	max. 10	%	ISO 5794-1F
SA Ro-Tap (> 300 µm)	min. 80	%	ISO 5794-1F
Electrical Conductivity (4% in water)	max. 1300	µS/cm	ISO 787-14
Pour Density	260	g/l	ASTM D1513
pH Value (5 % in water)	6.5	—	ISO 787-9
Loss on Drying (2h at 105°C)	5.5	%	ISO 787-2
Specific Surface Area (CTAB)	160	m²/g	ISO 5794-1G
Specific Surface Area (N₂, Multipoint)	175	m²/g	ISO 9277