Phosphorylated Pentaerythritol Reactive FR Polyol

Name: Phosphorylated Pentaerythritol Reactive FR Polyol
Brand: Chemzip
Price: 1 USD
Availability: InStock

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.

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Technical Specifications

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

Applications

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

Key Features

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