Silane Coupling Agent Si75 (Bis-TESPS)
Silane Coupling Agent Si75 (bis[3-(triethoxysilylpropyl)]-disulfide, Bis-TESPS) is a disulfide silane offering lower ethanol release and reduced premature vulcanization risk compared to the tetrasulfide Si69. Its shorter polysulfide chain provides a more predictable processing window and is preferred in compounds requiring tight scorch control and on continuously operating mixing lines. Si75 delivers comparable reinforcement and rolling resistance benefits to Si69 while improving processing safety.
المواصفات الفنية
| appearance | Light yellow to amber liquid |
| purity (%) | ≥95.0 |
| moisture (%) | ≤0.10 |
| sulfur content (%) | 12.0–13.5 |
| refractive index (20°C) | 1.456–1.464 |
| specific gravity (20°C) | 1.055–1.065 |
مجالات التطبيق
- Continuous-process silica tire tread mixing lines
- High-silica content tread compounds with scorch safety requirements
- Semi-EV and electric vehicle tire tread formulations
- Silica-reinforced truck tire treads
- Compounds processed at elevated mixing temperatures
مميزات المنتج
- Lower ethanol emission and reduced scorching vs Si69 tetrasulfide
- Better processing safety for continuous mixing operations
- Comparable rolling resistance and reinforcement to Si69
- Suitable for high-temperature silica mixing protocols
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