107 Silicone Rubber Base 120000 cst CAS 70131-67-8 High Viscosity for Structural Sealant
107 Silicone Rubber Base 120000 cst is high‑molecular‑weight hydroxyl‑terminated polydimethylsiloxane. With stable 120000 cst viscosity, it can cross‑link with silane cross‑linker under catalyst at room temperature to form high‑strength silicone elastomer. The cured rubber possesses excellent tensile strength, cohesive property, UV and ozone resistance. It is the core base polymer for two‑component structura
Product Overview
107 Silicone Rubber Base 120000 cst CAS 70131‑67‑8 is linear hydroxyl‑terminated polydimethylsiloxane with ultra‑high viscosity. Active hydroxyl groups at molecular chain ends support room‑temperature vulcanization reaction. After compounding with reinforcing fillers, cross‑linking agents and catalyst, the mixture cures into tough silicone rubber. High molecular weight structure delivers high modulus and outstanding mechanical properties, which satisfy strict performance requirements of building structural bonding and sealing.
Key Features
- Stable 120000 cst high viscosity, match compounding process of structural sealant
- Reactive hydroxyl end groups for stable room‑temperature cross‑linking
- Impart high modulus, high tensile strength and good cohesive performance to cured sealant
- Excellent anti‑UV, ozone and weather ageing performance for long‑term outdoor service
- Good compatibility with silica fillers and various silicone functional additives
Main Applications
‑ Base polymer for two‑component building structural silicone sealant ‑ Curtain wall structural bonding sealant formulation ‑ Construction high‑strength joint sealing silicone production ‑ Two‑component RTV silicone rubber compounding ‑ High‑performance architectural sealing material manufacturing
Usage Recommendation
All batching and mixing operations should be finished under low‑humidity environment. Mix with reinforcing filler, silane cross‑linker and catalyst according to production formula. Strictly avoid moisture contamination, moisture will trigger abnormal curing phenomenon. Adjust filler proportion to optimize modulus, hardness and extrusion property of finished structural sealant.
Storage & Package
Store in cool, dry and air‑tight warehouse. Keep away from humid air and water vapor to prevent premature cross‑linking. Standard iron drum packaging. Tightly close drum lid right after partial mate
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