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-triethoxysilylpropyl) disulfide) TESPD is a bifunction polysulfidic organosilane widely used in the rubber industry. It improves the reinforcing capability of fillers with silanol groups and enhances cross-linking network properties.
Compared to the polysulfidic organosilane Crosile® 69 (Bis(3-triethoxysilylpropyl)tetrasulfide), Crosile®75 offers:
- Higher temperature stability
- Compatibility with higher mixing temperatures
- Improved tensile strength and modulus
- Reduced compression set
- Increased abrasion resistance
- Optimized dynamic properties
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
-
- Multifunctional silane coupling agent that improves physical/mechanical properties of vulcanizates – enhances tensile strength, tearing strength, abrasive resistance while reducing compression set and viscosity.
- Specifically enhances reinforcing properties of hydroxyl-containing fillers (silica, talc, mica, clay) in unsaturated polymers with double bonds (NR, IR, SBR, BR, NBR, EPDM).
Recommended dosage: 1.0-4.0 PHR
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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