Bisphenol A Bis(diphenyl phosphate) (BDP)

Name: Bisphenol A Bis(diphenyl phosphate) (BDP)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 181028-79-5

Bisphenol A bis(diphenyl phosphate) (BDP) is a halogen-free, high-molecular-weight aryl phosphate oligomer flame retardant designed for engineering thermoplastics requiring heat resistance and flame retardancy. BDP has lower volatility and plasticization effect than RDP, making it preferred in high-heat PC-rich blends, PPO/HIPS alloys, and PBT/PC systems. Its aromatic backbone stabilizes the polymer under continuous service at elevated temperatures while providing UL94 V-0 performance.

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Technical Specifications

appearance	Colorless to pale yellow liquid
moisture (%)	<0.1
acid value (mgKOH/g)	<0.1
phosphorus content (%)	8.9–9.2
density (20°C, g/cm³)	1.28–1.31
viscosity (25°C, mPa·s)	1000–3000

Applications

PPO/HIPS and PPO/PA engineering plastic blends for electrical applications
High-heat PC-rich blends for automotive lamp housings and connectors
PBT/PC alloys for electrical enclosures and connector blocks
Server and data center equipment housings requiring V-0 at high temperatures
Thin-wall electronic components requiring UL94 V-0 at 0.8–1.6 mm

Key Features

Higher molecular weight than RDP results in lower volatility and better retention in high-heat processes
Minimal plasticizing effect preserves heat deflection temperature (HDT) in PC-rich compounds
Halogen-free, RoHS-compliant, and suitable for electronics and automotive OEM applications
Low acid value (<0.1 mgKOH/g) prevents degradation of polycarbonate at elevated processing temperatures