Hexaphenoxycyclotriphosphazene (SPB-100)

Name: Hexaphenoxycyclotriphosphazene (SPB-100)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 1184-10-7

Hexaphenoxycyclotriphosphazene (commonly known as SPB-100) is a halogen-free, thermally stable cyclic phosphazene flame retardant featuring an inorganic P–N backbone that provides exceptional thermal stability up to 270 °C. It is particularly suited for high-performance engineering plastics including polycarbonate, polyphenylene oxide (PPO), and polyamide, where processing temperatures and end-use thermal demands are stringent. The compound acts through both gas-phase inhibition and condensed-phase char promotion, delivering outstanding flame retardancy with minimal impact on transparency and mechanical properties.

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Technical Specifications

appearance	White crystalline powder
moisture (%)	<0.2
melting point (°C)	110–115
nitrogen content (%)	7.8–8.2
phosphorus content (%)	13.4–13.8
decomposition temperature (°C)	>270

Applications

Polycarbonate (PC) and PC/ABS blends requiring UL94 V-0 with high transparency retention
Polyphenylene oxide (PPO/HIPS) blends for electrical and electronic housings
High-performance polyamide PA6/PA66 compounds for under-hood automotive parts
Epoxy resin and printed circuit board laminates requiring high-Tg halogen-free FR
Thermoplastic polyurethane (TPU) and PBT compounds for wire and cable applications

Key Features

Inorganic P–N ring backbone provides exceptional thermal stability (>270 °C) for demanding engineering plastic processing
Minimal impact on optical clarity in transparent PC applications unlike opaque mineral fillers
Halogen-free and nitrogen–phosphorus synergistic, meeting EU REACH and electronics environmental standards
Low loading (5–15%) sufficient for UL94 V-0 in PC and PPO blends preserving mechanical performance