Shanghai Semitech New Material Co., Ltd.
1628 Lijing Road, Lingang New Area, 200000, Shanghai, China.
Mobile:
+8615639100440
Email:
info@semitechnm.com
Hydrogen Terminated Silicone Oil (THF Series) | LSR Chain Extender
Conclusions First: MESIL® THF Series consists of high-reactivity Hydrogen-terminated polydimethylsiloxane (Si-H at chain ends). Designed as the primary chain extender for addition-curing liquid silicone rubber (LSR), these fluids offer superior hydrosilylation reactivity compared to side-chain hydrogen oils. Available in molecular weights from 6k to 15k for precise formulation control.
Technical Parameter Matrix
Compare viscosity and hydrogen content across the THF series to calibrate your silicone rubber compounding.
| Product Grade | Viscosity (25℃, mm²/s) | Molecular Weight (g/mol) | Hydrogen Content (wt%) | Volatile (105℃, 1.5h) % |
|---|---|---|---|---|
| THF-6K | 120 ± 15 | 6,000 | 0.033 | ≤ 3.0 |
| THF-8K | 200 ± 20 | 8,000 | 0.024 | ≤ 3.0 |
| THF-10K | 280 ± 20 | 10,000 | 0.019 | ≤ 3.0 |
| THF-13K | 410 ± 30 | 13,000 | 0.013 | ≤ 3.0 |
| THF-15K | 580 ± 40 | 15,000 | 0.011 | ≤ 3.0 |
*All grades are colorless and transparent oil with no visible impurities.
Targeted Industrial Applications
- LSR Chain Extension
- Used as a critical chain extender in additive-type liquid silicone rubber. Reactive Si-H ends enable precise control over the elastomer network's mechanical properties.
- Chemical Intermediates
- The starting material for the production of silicone-modified block or graft copolymers. Essential for basic hydrosilylation intermediates.
- Surface Treatment
- Serves as a high-performance waterproof agent and softener for both textile finishing and leather manufacturing industries.
Packaging & Global Logistics
| Standard Packaging | 950 kg / Barrel (IBC) |
|---|---|
| Storage Temperature | -45°C to 45°C |
| Shelf Life | Store in original sealed containers; prevent rain and sunlight. |
System Loop: Technical Support FAQ
- What is the recommended mole ratio for complete reaction with vinyl groups?
- The addition should comply with a 1:1 mole ratio of silicon-hydrogen (Si-H) and vinyl (allyl). Usually, a slight excess of Si-H is required for a complete reaction.
- What are the optimal reaction temperature parameters?
- The recommended reaction temperature is 80-90°C. Due to the exothermic nature of hydrosilylation, heat elimination by precise temperature control is mandatory.
- How does THF-Series reactivity compare to standard hydrogen silicone oil?
- Because the reactive Si-H bonds are located strictly at the chain ends, the THF series provides a higher reaction rate and better accessibility for block copolymerization than side-chain types.