Silane Coupling Agents | Thiocyanato Silanes | Surface Modifiers

SiSiB® PC2640

Synonym: Triethoxy(3-thiocyanatopropyl)silane

Countertype of Degussa Si 264

Chemical Structure


SiSiB® PC2640 is a bifunctional, sulfur-containing organosilane for rubber applications in combination with white fillers containing silanol groups.

Typical Physical Properties

Chemical Name: 3-Thiocyanatopropyltriethoxysilane
CAS No.: 34708-08-2
EINECS No.: 252-161-3
Empirical Formula: C10H21NO3SSi
Molecular Weight: 263.43
Boiling Point: 95°C [0.1mmHg]
Flash Point: 138°C
Color and Appearance: Straw to yellowish liquid with mild odor
Density [25°C]: 1.03
Refractive Index [25°C]: 1.446
Purity: Min.97.0% by GC


SiSiB® PC2640 can improve reinforcing properties of fillers that contain hydroxyl groups.

SiSiB® PC2640 can improve physical and mechanical properties of vulcanizates. It can improve tensile strength, tearing strength and abrasive resistance and reduce compression set of vulcanizates. In addition, it can reduce the viscosity and improve the processability of rubber products.


Standard packing is200Kg steel drum or 1000Kg IBC container, for more details, please visit Packing Centre. Custom packing is available.

Technical Library

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