α,ω-silanol-terminated polydimethylsiloxane;
(α,ω-Dihydroxypolydimethylsiloxane)
Chemical Structure
Introduction
SiSiB® PF1070 polymer are intermediates for most room temperature vulcanizeable (RTV) silicones.
Typical Physical Properties
| Product: | α,ω-silanol-terminated polydimethylsiloxane |
|---|---|
| CAS No.: | 70131-67-8 |
| Color and Appearance: | Colorless transparent liquid |
| Specific Gravity 25°C | 0.96-0.98 |
| Refractive Index: | 1.401-1.403 |
| Viscosity [cps]: | 5000 cps |
| Note: | Other available viscosity:750cps, 1500cps, 2000cps, 3500cps, 4000cps, 5000cps, 6000cps,10000cps, 20000cps, 50000cps, 80000cps, 150000cps |
Applications
Condensation cure one-part and two-part RTV systems are formulated from silanol terminated polymers with molecular weights ranging from 15,000 to 150,000. One-part systems are the most widely used. One-part systems are crosslinked with moisture-sensitive multi-functional silanes in a two stage reaction. In the first stage, aftercompounding with fillers, the silanol is reacted with an excess of multi-functional silane. The silanol is in essence displaced by the silane.
The reactivity of silanol fluids is utilized in applications other than RTV’s. Low viscosity silanol fluids are employed as filler treatments and structure control additives in silicone rubber compounding. Intermediate viscosity, 1000-10,000 cSt. fluids can be applied to textiles as durable fabric softeners. High viscosity silanol terminated fluids form the matrix component in tackifiers and pressure sensitive adhesives.
GUIDE – SiSiB SILANES & SILICONES – RTV-1 formulation solution
GUIDE – SiSiB SILANES & SILICONES – RTV-2 formulation solution
Packings
Net weight 190Kg steel drum or 950Kg IBC container, for more details, please visit Packing Centre.