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Bis (3-(triethoxysilyl) propyl) disulfide Si 75

brand: Crosile

model: Crosile-75

use: rubber polymer



Chemical Name: Bis [3-(triethoxysilyl) propyl] disulfide
Formula: C18H42O6S2Si2

CAS No.: 56706-10-6

Equivalent type:SI-75,SI-266(Degussa,German),A-1589(Wolters Kluwer)/Z-6820(Dow Corning)

Other name :TESPD
Physical Properties:
A pale yellow clear liquid with light odor of ethyl alcohol and soluble easily in ethyl alcohol, acetone, benzene, toluene etc. Insoluble in water.


Test Items Target Values(Spec.Limits)
Sulfur Content 15% ± 1%
Alcohol content ≤0.5%
*γ2 Content ≤3.0%
Specific Gravity (25℃,g/cm3) 1.040 ±0.020 (25℃)
Refractive Index (25℃) 1.460±0.020 (25℃)
Flash Point >93℃(Close cup)
Solubility in water Insolube


1. Crosile-75 is a kind of multifunctional silane coupling agent that has been used successfully in the rubber industry. It is used to improve physical and mechanical properties of vulcanizates. It is able to markedly 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
2. Crosile-75 is especially suitable to improve the reinforcing properties of fillers that contain hydroxyl groups in all unsaturated polymers having double bonds or their blends. Silica, talc powder, mica powder and clay can be used in combination with Crosile-75 in polymers such as NR, IR, SBR, BR, NBR and EPDM.
Recommend dosage 1.0-4.0 PHR

Packaging And Storage

1. Package:25kg or 200kg, 1000 kg in plastic drum.
2. Storage: Kept in a low temperature, dry and ventilated place, avoid direct sunlight.
3. Shelf life: One year in ventilating, cool and dry area.

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