Shanghai Semitech New Material Co., Ltd.
1628 Lijing Road, Lingang New Area, 200000, Shanghai, China.
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Hydrogen Silicone Fluid Selection Guide: Engineering Si-H Reactivity
Conclusions First: MESIL® Hydrogen Silicone Oils are high-purity reactive fluids engineered for precision cross-linking and surface modification. By calibrating the Silicon-Hydrogen (Si-H) bond density from 0.18% to 1.58%, formulators can achieve superior film-forming waterproofing or highly controlled silicone rubber vulcanization.
Mapping Performance Logic
How do you determine the correct hydrogen content for your specific industrial requirement?
- Which grade is required for high-density waterproofing of fabrics, ceramics, or marble?
- For maximum film-forming density and hydrophobicity, utilize **Poly(methylhydrosiloxane)** with a typical hydrogen content of 1.58 wt%. This high-density fluid reacts under metal salt catalysts to form a durable, cross-linked waterproof barrier even at low temperatures.
- How do I select a cross-linking agent for addition-molding silicone rubber or LED potting?
- Prioritize the **Low Hydrogen Series** (0.18% - 1.2% Si-H). These graded fluids allow for precise titration of cross-link density in liquid silicone rubber (LSR) and potting adhesives, ensuring optimal mechanical properties and non-yellowing performance.
- What is the recommended intermediate for synthesizing polyether or alkyl-modified silicone oils?
- Select from the **Hydrogen-contained Silicone Oil** range based on the desired modification density. These fluids serve as the reactive backbone for hydrosilylation reactions with double bonds or hydroxyl groups to produce leveling agents and defoamers.
Technical Parameter Matrix
Comparative data for the MESIL® Hydrogen series to facilitate laboratory formulation and technical selection.
1. High Hydrogen Series: Poly(methylhydrosiloxane)
| Parameter | Standard Index |
|---|---|
| Appearance | Colorless and transparent oil |
| Viscosity (25℃) | 25 ± 5 mm²/s |
| Hydrogen Content (wt%) | 1.58 (Typical) |
| Flash Point (Open Cup) | ≥150℃ |
| Refractive Index | 1.39 - 1.40 |
2. Low Hydrogen Series: Graded Reactive Oils
| Si-H Content (wt%) | Viscosity (mm²/s) | Volatile Matter (%) | Primary Use Case |
|---|---|---|---|
| 0.18 - 0.36 | 10 - 130 | ≤ 5% | LSR Crosslinking / Potting |
| 0.55 - 0.82 | 50 - 130 | ≤ 2% | Modification Intermediates |
| 1.0 - 1.2 | 20 - 60 | ≤ 5% | High-Density Reactive Synthesis |
Packaging & Storage Comparison
| Feature | High Hydrogen (1.58%) | Low Hydrogen (0.18% - 1.2%) |
|---|---|---|
| Standard Package | 200 kg / 1000 kg Barrel | 950 kg Barrel |
| Storage Period | > 1 Year | 12 Months |
| Safety Requirement | Avoid Alkalines / Acid-proof | Sealed / Cool & Dry |
System Loop: Technical Support FAQ
- How is the waterproof film formed during the application process?
- Under the catalytic action of metal salts, the reactive Si-H bonds cross-link at low temperatures to form a durable, hydrophobic film on the surface of materials such as glass, ceramics, and textiles.
- What specific chemical groups can these silicone fluids react with?
- Through hydrosilylation, these oils react efficiently with double bonds and hydroxyl groups, making them the essential raw materials for producing water-soluble silicone oils, defoamers, and leveling agents.