107 Silicone Polymer Raw Material CAS 70131-67-8 for Silicone Sealant and Adhesive Production
107 Silicone Polymer Raw Material is linear hydroxyl‑terminated polydimethylsiloxane, the core base material for silicone sealant and adhesive manufacturing. It can produce condensation cross‑linking reaction with silane cross‑linker under organotin catalyst at room temperature and form elastic silicone elastomer. A full range of viscosity grades are available to meet different compounding process requirements. Cured sealants and adhesives possess outstanding weather resistance, ozone resistance
Product Overview
107 Silicone Polymer Raw Material CAS 70131‑67‑8 is silanol‑terminated polydimethylsiloxane tailored for sealant and adhesive industry. Reactive hydroxyl groups are located at both ends of molecular chain. When compounded with reinforcing silica fillers, cross‑linkers and catalyst, the system cures via room‑temperature condensation reaction into high‑resilience silicone rubber. Various viscosity options enable formula customization for multiple sealant and adhesive end‑products.
Key Features
- Terminal hydroxyl groups provide stable, repeatable room‑temperature condensation curing
- Wide viscosity selection, compatible with different sealant mixing and extrusion processes
- Superior wettability towards silica fillers, good compatibility with plasticizers and silicone additives
- Cured materials exhibit stable adhesion, outstanding UV‑ozone resistance and long‑term outdoor ageing performance
- Consistent batch‑to‑batch quality, suitable for large‑volume industrial compounding
Main Applications
‑ Base polymer for silicone sealant and adhesive production ‑ Two‑component construction silicone sealant formulation ‑ Industrial sealing and bonding adhesive compounding ‑ Condensation‑cure RTV silicone elastomer manufacturing ‑ Custom development of special‑purpose sealing adhesive products
Usage Recommendation
Perform batching and mixing under low‑humidity conditions. Combine 107 silicone polymer, reinforcing filler, cross‑linking agent and catalyst strictly following technical formula. Avoid moisture contamination; moisture causes bubbles, surface tackiness and incomplete vulcanization. Adjust filler loading to tune extrusion behavior, hardness and mechanical properties of finished sealants and adhesives.
Storage & Package
Store in cool, dry, tightly sealed warehouse. Isolate from humid air and water vapor to prevent premature cross‑linking. Standard iron drum packaging. Reseal drum immediately after partial material withdrawal. Open drums and handle materials only within dry working environment.
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