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Si 69®

Technical Datasheet | Supplied by Evonik
Si 69® by Evonik is a bifunctional, sulfur containing organosilane. Acts as a reinforcing filler. It reacts with silanol groups of white fillers during mixingand with the polymer during vulcanization under formation ofcovalent chemical bonds. This imparts greater tensile strength,higher moduli, reduced compression set, increased abrasion resistance and optimized dynamic properties. Si 69® is used in almost all fields of the rubber industry where silanol group containing white fillers are used and optimum technical properties are required. Application include low rolling resistance tires, mechanical rubber goods and shoe soles. It has a shelf life of 12 months.
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Product Type
  • Fillers
  • Fillers > > silanol
Chemical Composition
Bis (triethoxysilylpropyl) tetrasulfide
CAS Number
40372-72-3

Compatiblity with other products

Find products that are predicted to be compatible with Si 69®.

This list of compatible products is generated out of estimated HSP values. A practical determination of these HSP values would provide higher certainty.
Learn more about Hansen Solubility Parameters (HSP) and their use in predictive formulation.

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