107 Silicone Base 500000 cst CAS 70131-67-8 for Low Hardness Silicone Gel
107 Silicone Base 500000 cst is hydroxyl‑terminated polydimethylsiloxane, CAS 70131‑67‑8. This ultra‑high viscosity 107 silicone polymer is developed for low‑hardness soft silicone gel. With controllable hydroxyl content, it can formulate soft elastic gel system after matching cross‑linker and catalyst. The cured silicone gel shows low hardness, good resilience, vibration damping and moisture‑proof properties, widely used for electronic cushioning protection, shock‑absorbing components and soft
Product Overview
107 Silicone Base 500000 cst belongs to hydroxyl‑terminated polydimethylsiloxane series, CAS 70131‑67‑8. This ultra‑high viscosity condensation‑cure base polymer is specially engineered for low‑hardness silicone gel production. Viscosity and hydroxyl value are strictly controlled for every batch. By adjusting filler loading and curing agent ratio, it can achieve different soft‑grade silicone gel. Rigorous quality inspection ensures stable performance for mass production of soft silicone products.
Key Features
- 500000 cst ultra‑high viscosity dedicated for low hardness silicone gel
- Uniform hydroxyl end‑groups to realize mild and stable condensation cross‑linking
- Good compatibility with light‑loading functional fillers
- Cured silicone gel presents low hardness, soft texture and good resilience
- Excellent vibration damping, shock‑absorbing and buffer performance
- Fine moisture‑proof and insulation property for electronic application
- Adjustable gel hardness by formula modification
- Compatible with standard silane cross‑linkers and organotin catalysts
- Low volatile content, stable batch‑to‑batch quality
Main Applications
- Condensation‑cure low‑hardness soft silicone gel
- Electronic module cushioning and shock‑absorbing potting gel
- Vibration‑damping soft silicone components
- Flexible buffer and protection silicone parts
- Custom soft‑texture silicone compound formulations
- Industrial products requiring low‑modulus elastic silicone
Processing Suggestions
Conduct feeding, kneading and mixing under strictly moisture‑free environment. Combine with appropriate fillers, silane cross‑linking agent and organotin catalyst. Adjust filler dosage and curing agent proportion to reach target gel hardness. Keep away from moisture during the whole production process to avoid incomplete curing and surface tackiness.
Storage & Packing
Packed in sealed 200kg iron drum. Store in cool, dry and ventilated warehouse. Keep drum tightly sealed. Protect from moisture, high temperature and direct sunlight. Reseal drum immediately after partial material discharge. Proper storage preserves polymer reactivity and guarantees valid shelf‑life.
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