Bisphenoxyethanolfluorene (BPEF) is a high-purity, cardo-type fluorene-based bisphenol monomer widely recognized as the key building block for ultra-high-performance engineering plastics, especially fluorene-based polycarbonates (FPC), polyesters (PEF polyesters), and polyarylates.
Thanks to the rigid fluorene (cardo) structure, polymers derived from BPEF exhibit exceptional heat resistance (Tg > 250 °C for some grades), outstanding optical transparency, high refractive index (>1.64), low birefringence, excellent dimensional stability, and superior mechanical strength.
BPEF is the preferred alternative to BPA (Bisphenol A) in applications requiring BPA-free, high-heat, and optical-grade polymers.

 

Technical Specifications

ITEMS SPECIFICATIONS
Appearance white crystalline powder
Purity (HPLC) ≥99.0%
Volatile Component ≤0.5%
Melting Point 160-165℃
APHA, Hazen ≤30

 

Package and Storage

  • Net weight 25kg cardboard drum.
  • Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

 

Main Advantages of Bisphenoxyethanolfluorene (BPEF)

  • Extremely high glass transition temperature (Tg 250–330 °C depending on copolymer)
  • High refractive index (nD>1.640) – ideal for optical lenses and films
  • Very low birefringence and excellent optical transparency (>90% transmission)
  • Superior heat resistance and long-term thermal stability
  • Excellent flame retardancy (many grades achieve UL94 V-0 without halogen)
  • Outstanding mechanical properties and impact resistance
  • BPA-free and compliant with strict regulatory requirements
  • Low water absorption and excellent dimensional stability

 

Primary Applications of Bisphenoxyethanolfluorene (BPEF)

  • Optical lenses, films, and light-guide plates (VR/AR, camera modules, automotive HUD)
  • High-heat polycarbonate copolymers for 5G base station components and EV battery parts
  • LED encapsulation materials and display substrates
  • Aerospace and automotive transparent structural parts
  • Medical devices requiring sterilization resistance
  • High-performance engineering plastics replacing glass in electronics
  • Polyester fibers and films with enhanced dyeability and heat resistance

 

Frequently Asked Questions (FAQs)

What is the main difference between BPEF and Bisphenol A (BPA)?
BPEF contains a rigid fluorene (cardo) structure instead of the isopropylidene group in BPA. This results in dramatically higher Tg (>250 °C vs 150 °C), much higher refractive index, lower birefringence, and superior heat/mechanical performance while remaining BPA-free.

Is BPEF considered a BPA-free monomer?
Yes, 100%. BPEF does not contain or release Bisphenol A and is widely accepted as a safe, high-performance alternative to BPA in optical and high-heat applications.

Can BPEF be used to produce optical-grade polycarbonate lenses?
Yes. BPEF-based polycarbonates are the material of choice for high-end VR/AR lenses, smartphone camera lens covers, and automotive head-up display optics due to their high refractive index and extremely low birefringence.

 

Where can I buy high-quality Bisphenoxyethanolfluorene (BPEF)?

You can contact us via email [email protected] for offers and bulk orders.