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CAS No. 40372-72-3 Si-69 Sulfur Silane Coupling Agent Bis ( Triethoxysilylpropyl ) Tetrasulfide
Type :Sulfur Silane Coupling Agent Crosile - 69
CAS No. : 40372-72-3
Chemical Name: Bis [3-(triethoxysilyl) propyl] tetrasulfide
Formula: (C2H5O)3SiCH2CH2CH2-S4-CH2CH2CH2Si(OC2H5)3
Physical Properties
Silane Coupling Agent Crosile- 69 is a pale yellow clear liquid with light odor. It can provide a stable bond by reducing the interfacial tension between the fibrous of particulate inorganic component and the organic matrix polymer in reinforced and filled plastics.
When used in rubber compounds, it produces these effects:
Coupling agent for non-black pigments.
Cure equilibrium for reversion resistance.
Curing agent for good heat aging.
Coupling Agent - With as little as 0.5 to 1.0 phr with clay fillers and 1.0 to 4.0 phr for silica pigments, couples the non-black pigment and elastomers resulting in increases in modulus and increase in abrasion resistance.
Cure Equilibrium - has four sulfur atoms positioned in the center. At cure temperatures, these participate with sulfur in producing polysulfidic crosslinks. it replaces crosslinks broken during cure, resulting in reversion resistant, and with proper compounding, reversion free compounds. This is known as equilibrium cure. The dynamic flex characteristics, E.G., heat generation and crack growth, are dramatically improved.
Curing Agent - Removing all sulfur from the compound for NR, SBR, NBR and replacing it with YokoSil™ S40 and certain thiuram accelerators, produces compounds with excellent heat aging characteristics in addition to the coupling effects. it has crosslinking and accelerator activity in rubber compounds.
Specification
| Test Item | Target Values(Spec.Limits) |
| Alcohol content | ≤0.5% |
| CLPTES Content | ≤3.0% |
| Other impurity content | ≤1.0% |
| Viscosity 25℃ | ≤14(cps) |
| Specific Gravity (25℃,g/cm3) | 1.080 ± 0.020 |
| Refractive Index (25℃) | 1.480 ± 0.020 |
| Chlorine Content | ≤0.6% |
| Weight Loss Rate(105℃) | ≤2.0% |
| Resiue On Ignition(800±25℃) | 11.3±1.0% |
Application
Silane Coupling Agent Crosile- 69
Footwear
- Abrasion resistance
- Cutting and chunking resistance
- Flex life improvement
Rolls
- Abrasion resistance
- Aging resistance
- Processing- Set reduction (better load bearing)
- Reduced water swell
- Lower hysteresis
Mechanical Molded Goods
- Increased modulus
- Better heat aging
- Compression set reduction
- Dynamic property improvement
- Reduced swell to polar liquids
- Filler substitution (non-black for black)
Hose
- Improved abrasion on cover
- Better heat aging
- Increased modulus
- Lower compression set
- Improved adhesion to reinforcing elements
Tires
- Treads for abrasion, hot tear
- Carcass for adhesion and/or filler substitution
- Breaker (belt) stocks for adhesion
Solid Tires
- Improved abrasion
- Lower hysteresis
- Higher modulus
- Improved processing
- Possibly better adhesion
Belts
Flat Belts
- Increased abrasion
- Improved reversion resistance
- Reduced cost with clay substitution for black
- Improved cord adhesion
- Increased flex life and modulus
V Belts
- Increased modulus
- Improved abrasion
- Longer flex life
- Improved adhesion to reinforcing elements
Recommend dosage 1.0-4.0 PHR
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.
