Disulfide Silane Coupling Agent Crosile® 75
Chemical Name
Bis [3-(triethoxysilyl)propyl] disulfide
CAS NO.
56706-10-6
Formula
(C2H5O)3SiCH2CH2CH2-S2-CH2CH2CH2Si(OC2H5)3
Formula Structure
![Chemical structure of Bis[3-(triethoxysilyl)propyl] disulfide](https://www.ecopowerchem.com/js/tinymce/demo/images/202306/01/6872d2ae2915191034ab76b78fb3e45b.png)
Synonyms
- BIS(TRIETHOXYSILYLPROPYL)DISULFIDE
- Bis(3-triethoxysilylpropyl)disulfane
- BIS[3-(TRIETHOXYSILYL) PROPYL]-DISULFIDE
- Bis[3-(triethoxysilyl)propyl] persulfide
- 3,3′-Bis-(triethoxysilylpropyl) disulfide
- Bis[3-(triethoxysilyl)propyl] perdisulfide
- bis[γ-(triethoxysilyl-propyl]-disulfide
- Bis-(γ-triethoxysilylpropyl)-disulfide Si 75
Properties
Crosile® 75 (Bis[3-(triethoxysilyl)propyl] disulfide, TESPD) is a bifunctional sulfur-containing silane coupling agent widely used in silica-reinforced rubber compounds.
It improves the interaction between inorganic fillers and rubber polymers, enhancing filler dispersion, reinforcement efficiency, and processing performance.
Compared with TESPT-based silane coupling agents, Crosile® 75 offers improved thermal stability and is suitable for rubber compounds processed at higher mixing temperatures.
Specifications
| Properties | Units | Target Values (Spec,Limits) |
|---|---|---|
| Alcohol content | %(wt) | ≤0.5% |
| γ2 Content | %(wt) | ≤3.0% |
| Other impurity content | %(wt) | ≤1.0% |
| Viscosity 25°C | Cps | ≤14.0 |
| Sulfur Content | %(wt) | 15.0 ± 1.0 |
| S2 content | %(wt) | 80-90 |
| S4-S8 content | %(wt) | 10.00% |
| Average sulfur chain | – | 2.20±0.15 |
| Other Impurity Content | %(wt) | Max 4.0 |
| Specific Gravity (25°C) | g/cm3 | 1.080 ± 0.020 |
| Refractive Index (25°C) | – | 1.480 ± 0.020 |
Application
-
- Used as a silane coupling agent in silica-filled rubber compounds.
- Improves the bonding between fillers and rubber matrices, contributing to enhanced reinforcement performance.
- Helps improve filler dispersion and processing performance in rubber formulations.
- Suitable for silica, talc, mica, clay, and other mineral fillers.
- Compatible with NR, IR, SBR, BR, NBR, and EPDM compounds.
- Commonly used in tire compounds, industrial rubber products, footwear, conveyor belts, and other rubber applications.
Packaging And Transportation
Packing:
- 25 kg/drum (16 MT/20 FCL with pallet)
- 200 kg/drum (16 MT/20 FCL with pallet)
- 1060 kg in IBC drum (21.2 MT/20 FCL with pallet)
Storage:
Store in cool, dry, ventilated area away from direct sunlight.
Shelf life:
12 months in ventilated, cool, dry conditions.
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