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COUPSIL® VP 6508

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Products

Reaction product of organosilane Dynasylan® VTEO (Vinyltriethoxysilane) and ULTRASIL® VN 2 (specific surface area 130 m2/g). The production consists of one hundred parts of ULTRASIL® VN 2 modified with eight parts of Dynasylan® VTEO. Since the reaction between the organosilane and the silica is complete, COUPSIL® VP 6508 offers the advantage of a homogeneous modification with low moisture adsorption during storage and significantly lower development of ethanol during mixing and processing.
COUPSIL® VP 6508 is used as a reinforcing filler in rubber compounds. It reacts with unsaturated polymers during vulcanization under formation of covalent bonds. This imparts greater tensile strength, higher moduli, reduced compression set, increased abrasion resistance, and optimized dynamic properties.
COUPSIL® VP 6508 is used in peroxide-cured rubber compounds in combination with white fillers and where optimum technical properties are required.

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Typical Applications

Mechanical rubber goods

Benefits at a glance

COUPSIL® grades form a group of silane-modified silica products used as reinforcing fillers in rubber compounds with a wide range of polymers such as NR, IR, SBR, BR, (Hal)-IIR, NBR, EPDM, EPM and blends thereof. The use of COUPSIL® products is particularly advantageous in short mixing series. COUPSIL® grades therefore effectively meet the requirements of the rubber-processing industry, particularly for mechanical rubber goods, which demand products that can be easily processed.
Great advantages of the COUPSIL® family:
- Pre-reacted products which eliminate the equipment-related complex in-situ modification of silica in the mixer.
- Reaction in presence of accelerators by forming rubber-to-filler bonds during vulcanization.
- Enabling tear and abrasion resistance on an elevated level = as well as excellent dynamic properties

Product Details & Documents

Other

Further Information

Storage:

To ensure that product properties and application behavior remain unchanged, our precipitated silicas and silicates ought to be stored in closed and dry premises protected against exposure to volatile substances. Strict observance of optimum storage conditions ensures prolonged usability, nevertheless we recommend not to exceed a storage time > 24 months.
Forms of supply:
12,5 kg paper bags – 375 kg wooden pallet
400 kg FIBC – wooden pallet

Packaging:

12,5 kg bags on 375 kg wooden pallet, 400 kg FIBC – wooden pallet

Shelf life:

min. 24 months

Markets & Applications

Hoses & Tubes Rubber