Silanol Terminated PDMS Base for Fire Resistant Sealant CAS 70131-67-8 Raw Material
Silanol Terminated PDMS Base is silanol‑terminated polydimethylsiloxane, also known as 107 silicone rubber with CAS 70131‑67‑8. This base polymer is optimized for fire‑resistant silicone sealant. It possesses excellent miscibility with various flame retardant fillers and functional additives. After condensation cross‑linking, finished sealant retains elastic property while achieving fire‑retardant performance, widely applied in fire‑proof joint sealing of buildings, tunnels and fire‑safety relat
Product Overview
Silanol Terminated PDMS Base is silanol‑terminated polydimethylsiloxane (107 silicone base polymer), CAS 70131‑67‑8. It serves as core base resin for condensation‑cure fire resistant sealant. Precisely controlled silanol end‑groups ensure stable cross‑linking reaction with silane cross‑linkers. The polymer shows outstanding wetting capacity for flame‑retardant mineral fillers. Strict quality management stabilizes viscosity and reactivity to satisfy large‑scale production of fire‑safety silicone sealing materials.
Key Features
- Purpose‑built base polymer for fire resistant silicone sealant formulation
- Uniform silanol terminal groups for controllable condensation curing
- Excellent compatibility with flame‑retardant fillers and functional additives
- Good dispersion effect during kneading of high‑loading inorganic fillers
- Cured sealant combines elasticity, weather resistance and fire‑retardant performance
- Maintains sealing integrity under high‑temperature exposure condition
- Low volatile components, stable batch‑to‑batch repeatability
Main Applications
- Fire resistant condensation‑cure silicone sealant
- Fire‑proof joint sealing for building partition and curtain wall
- Fire safety sealing for tunnel, elevator shaft and pipeline penetration
- High‑temperature resistant sealing compound for industrial facilities
- Custom flame‑retardant silicone compound requiring elastic sealing property
Processing Suggestions
Complete feeding, kneading and dispersion under strictly moisture‑isolated workshop environment. Compound with flame‑retardant fillers, neutral cross‑linking agent and matched catalyst. Optimize filler loading and additive proportion according to target fire rating, hardness and mechanical requirements. Avoid moisture contamination throughout the whole manufacturing process to prevent curing defects.
Storage & Packing
Store in cool, dry and ventilated warehouse. Keep iron drum tightly sealed. Keep away from moisture, heat sources and direct sunlight. Reseal drum immediately after partial material discharge. Observe recommended storage conditions to retain polymer reactivity and guarantee shelf‑life.
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