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
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 |
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| Shelf Life | Store in original sealed containers; prevent rain and sunlight. |
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Frequently Asked Questions
+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.