Trimethoxysilylpropanethiol (CAS 4420-74-0) Comprehensive User Guide
Table of Contents
- 1. Product Overview & Specifications
- 2. Key Applications & Industry Uses
- 3. Performance Comparison with Similar Silane Coupling Agents
- 4. Step-by-Step Usage Guidelines
- 5. Real-World Customer Case Studies
- 6. Request Customized Technical Support
1. Product Overview & Specifications
Trimethoxysilylpropanethiol (CAS 4420-74-0), also known as 3-Mercaptopropyltrimethoxysilane, is a bifunctional organosilane with molecular formula C6H16O3SSi.
| Parameter | Specification |
|---|---|
| Molecular Weight | 196.34 g/mol |
| Appearance | Clear colorless to pale yellow liquid |
| Purity | ≥97% |
| Density | 1.04 g/cm³ at 25°C |
| Flash Point | 96°C (closed cup) |
2. Key Applications & Industry Uses
Primary industrial applications include:
- Rubber Industry: Enhances silica-filled tire compounds (improves wet grip by 15-20%)
- Coatings & Adhesives: Increases metal-polymer adhesion strength (up to 300% improvement)
- Electronics: Surface modifier for semiconductor packaging materials
- Biotechnology: Gold surface functionalization for biosensors
3. Performance Comparison with Similar Silane Coupling Agents
| Property | Trimethoxysilylpropanethiol | APTES | VTMO |
|---|---|---|---|
| Functional Group | -SH | -NH2 | -CH=CH2 |
| Hydrolysis Rate | Fast (15-30 mins) | Slow (2-4 hrs) | Medium (1-2 hrs) |
| Adhesion to Metals | Excellent | Good | Fair |
4. Step-by-Step Usage Guidelines
Typical Rubber Compounding Process:
- Pre-treatment: Dilute to 1-5% in ethanol/water (pH 4.5-5.5)
- Mixing: Add 1.5-3 phr during silica mixing stage
- Curing: 150-160°C for optimal crosslinking
5. Real-World Customer Case Studies
Case 1: Global Tire Manufacturer (2024 Implementation)
- Challenge: Reduce rolling resistance while maintaining wet grip
- Solution: 2.8 phr in silica-filled tread compound
- Results: 18% lower rolling resistance, wet grip index improved from 1.05 to 1.22
Case 2: Electronics Encapsulant Producer
- Challenge: Improve epoxy-metal interface adhesion
- Solution: 0.5% surface pretreatment
- Results: Pull-off strength increased from 4.3 MPa to 12.7 MPa
6. Request Customized Technical Support
For formulation assistance or material samples:
Email: info@vivalr.com
Phone: (86) 15866781826
Our technical team provides:
- Application-specific dosage recommendations
- Compatibility testing reports
- Regulatory compliance documentation



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