CAS 40372-72-3 Si-69 Sulfur Silane Coupling Agent Crosile 69
Improve Abrasion Resistance In Rubber
Type : Silane Coupling Agent Crosile - 69
Formula: (C2H5O)3SiCH2CH2CH2-S4-CH2CH2CH2Si(OC2H5)3
CAS No. : 40372-72-3
Chemical Name: Bis [3-(triethoxysilyl) propyl] tetrasulfide
Other name :Si 69
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.
Specification
| Test Items | Target Values(Spec.Limits) |
| Sulfur Content | 22% ± 1% |
| The average sulfur chain length | 3.75±0.15 |
| Other impurity content | ≤1.0% |
| Alcohol content | ≤0.5% |
| *γ2 Content | ≤3.0% |
| Specific Gravity (25℃,g/cm3) | 1.080 ± 0.020 |
| Refractive Index (25℃) | 1.480 ± 0.020 |
| Viscosity 25℃ | ≤14(cps) |
| S2 content | 17±3% |
| S3 content | 30±4% |
| S4 content | 24±3% |
| S5 - S8 content | 27±3% |
| Chlorine Content | ≤0.6% |
| Weight Loss Rate(105℃) | ≤2.0% |
| Resiue On Ignition(800±25℃) | 11.3±1.0% |
Application
Crosile - 69 is a kind of multifunctional silane coupling agent that has been
applied successfully in the rubber industry. It is applied in
improve physical and mechanical properties of vulcanizates.
Crosile - 69 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 - 69 in polymers such as NR, IR, SBR, BR, NBR and EPDM.
Recommend dosage 1.0-4.0PHR
Package and storage
1.Package: 25kg or 200kg in plastic drums and 1060kg/IBC.
2.Storage: Kept in a low temperature, dry and ventilated place,
avoid direct sunlight.
3.Shelf life: Two years in ventilating, cool and dry area.
