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IOTA-8865H is a dihydroxy-terminated silicone oligomer with an average molecular weight of approximately 4,000. It exhibits reactivity similar to conventional polyols and can copolymerize with -NCO and -COOH groups. It is primarily used in the synthesis of silicone-modified polyurethane resins and emulsions, as well as silicone-modified polyester resins, serving as a key raw material for imparting excellent surface properties and feel to resin systems.
| Parameter | Typical Value |
|---|---|
| Structural units | n=30, m=3 |
| Average molecular weight | 3550 / 4000 |
| Hydroxyl value (KOH mg/g) | 25.0 |
| Parameter | Specification |
|---|---|
| Appearance | Colorless to slightly yellow transparent liquid |
| Hydroxyl content | 0.8% |
| Average molecular weight | 4000 |
| Viscosity (25°C, cSt) | 1500–2500 |
| Solid content | ≥98.00% |
✅ Reactive with –NCO and –COOH groups
✅ Similar reactivity to polyester and polyether diols
✅ Enhances wear resistance of resins and coatings
✅ Provides excellent feel and smoothness
✅ Good anti-blocking, anti-fouling, and anti-graffiti properties
✅ Good compatibility with various resins
✅ Low surface tension – promotes leveling and flow
Synthesis of silicone-modified polyurethane resins and emulsions
Silicone-modified polyester resins
Two-component PU baking paints
Amino baking paint systems
