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Tetrasulfidosilane coupling agent for silica filled rubber. Features: Sulfur functional silane Reactive in sulfur-vulcanized rubber Benefits: Provides compatibility and coupling between inorganic fillers and organic rubber (e.g. silica and SBR) Composition: (EtO)3Si(CH2)3-Sx-(CH2)3Si(OEt)3 x~3.75 Applications: Coupling agent for inorganic fillers in organic rubber (such as silica in black rubber used in tire treads) Typical Properties: Specification Writers: These values are not intended for use in preparing specifications. Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on this product
|Appearance||clear, amber liquid|
|Average Sulfur Chain Length||3.75|
Dow Corning® Z-6940 Silane is a mixture of polysulfidosilane species with an average sulfur chain length of 3.75. It is a 100% actives product in a liquid form. How to Use
As with any organofunctional alkoxysilane coupling agent, Dow Canting Z-6940 Silane can be applied as a primer or incorporated in-situ in a compound formulation. As a primer of a surface, the silane can be dispersed in ethanol at about 1% and wiped onto a substrate. As an in-situ treatment, the silane is typically added with the organic matrix and inorganic filler/reinforcement. In the case of black rubber, oil silane is added with the rubber, oil and silica in the first mix. The ethoxysilyl groups then react to the surface of the inorganic material during this mix. It is typical to drive the temperature of the mixture to over 150°C to get adequate reaction of the silane to the filler.