Properties
Crosile® 75 (Bis(3-triethoxysilylpropyl) disulfide) TESPD is a bifunction polysulfidic organosilane and has been widely in the rubber industry. Crosile® 75 TESPD is used to improve the reinforcing capability of fillers with silanol group on their surface,and also as an integral part of curing systems to improve cross-linking network properties.
Compared to the polysulfidic organosilane Crosile® 69(Bis(3-triethoxysilylpropyl)tetrasulfide), Crosile®75 has a higher temperature stability and therefore allows higher mixing temperatures.
Crosile® 75 imparts greater tensile strength, higher module, reduced compression set, increased abrasion resistance and optimized dynamic properties.
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
| 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) | Cps | ≤14.0 |
| Sulfur Content | %(wt) | 15.0 ± 1.0 |
| S2 content | %(wt） | 80-90 |
| S4-S8 content | %(wt) | 10.00% |
| The 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
- 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 products.
- 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.
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