Phosphorylated Pentaerythritol Reactive FR Polyol
Phosphorylated pentaerythritol is a reactive multifunctional phosphorus-containing polyol that combines the carbon source and acid source functionalities into a single molecule, simplifying intumescent system formulation and improving IFR efficiency. It is produced by reacting pentaerythritol with phosphoric acid or phosphorus oxychloride, yielding a product with both residual hydroxyl groups and covalently bound phosphorus. This dual-function molecule is used in reactive polyurethane foam systems, intumescent coatings, and halogen-free polyolefin FR applications.
Teknik Özellikler
| appearance | White to off-white powder or viscous liquid |
| moisture (%) | <1.0 |
| acid value (mgKOH/g) | 5–30 |
| phosphorus content (%) | 10–18 |
| char yield at 600°C (%) | 25–40 |
| hydroxyl value (mgKOH/g) | 400–900 |
Uygulama Alanları
- Reactive flame-retardant polyol component in rigid polyurethane foam formulations
- Self-intumescent coating component combining char source and acid source in one molecule
- Halogen-free polyolefin FR compounding as combined char/acid source additive
- Epoxy resin reactive FR with char-forming functionality for PCB and structural applications
- Intumescent fire-stop caulk and sealant incorporating phosphorus into the polymer backbone
Ürün Özellikleri
- Combined acid source and carbon source in one molecule simplifies IFR formulation and reduces additive count
- Reactive OH groups enable covalent incorporation into PU foam and epoxy networks for non-migratory FR
- High char yield (25–40% at 600 °C) provides condensed-phase contribution superior to unphosphorylated PER
- Custom phosphorylation degree available to tune P content and hydroxyl functionality for specific applications
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