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Silane Coupling Agent Si69

Silane Coupling Agent  Si69

Chemical Name: Bis - [γ-(triethoxysilyl) propyl] tetrasulfide

Molecular Formula: C18H42O6Si2S4

Molecular Weight: 539

CAS NO.: 40372-72-3

AppearanceYellow or light yellow transparent liquid
Total Sulfur, %


Specific Gravity at 25/25°C1.1
Boiling Point, °C250
Refractive Index, nD 25°C1.481
Flash Point, Pensky-Martens Closed Cup(1), °C106

Application: Si69 is a kind of silane coupling agent with multiple functional groups successfully used in rubber industry to improve modulus and tensile strength of rubber, to reduce the compound viscosity and save process energy consumption. It is especially applicable for polymers with double bond or rubber formulation with hydroxyl fillers. The suitable fillers include silica, silicate, clay, etc. The suitable rubber include natural rubber (NR), Butadiene styrene rubber (SBR), Isoprene rubber (IR), Butadiene rubber (BR), Acrylonitrile butadiene rubber (NBR), Ethylene propylene diene rubber (EPDM), etc.

Package: 25KG plastic drum, 200KG iron drums, IBC drum or ISO tank.

Storage: Stored in cool and well ventilated place. Away from fire and water.