Halogen-free Anti-flammable Polyphosphonate

Primary Inventors: 

Flame-retardants (FR) are generally added to synthetic and natural polymers to reduce the flammability of the polymer materials.  While halogenated FRs are effective, environmental and health concerns are leading to restricted use in the U.S. and abroad. New polymers that are inherently flame-resistant, and also halogen-free, are thus highly desirable.  This invention utilizes a novel monomer, 4,4-bishydroxydeoxybenzoin (BHDB), for the preparation of aromatic polyphosphonates.  These polymers are highly-soluble and processible, and exhibit excellent fire-resistant behavior as evidenced from their low heat release capacity and high char yield.


The BHDB-polyphosphonates are envisioned for many flame-retardant materials and electronics applications.  The high solubility of these polymers in several organic solvents, combined with their thermal stability, makes them potential candidates to replace halogenated flame retardant materials used currently.


Halogen-free, ease of preparation, solution-processable, melt-processable, high thermal stability, excellent anti-flammable characteristics.

Licensing Status: 
Available for Licensing and/or Sponsored Research
Patent Status: 

Issued US Patents 7,863,400 and 8,158,742

UMA 06-22
For More Information: 

Commercial Ventures and Intellectual Property
Phone: 413-545-3606
E-mail: cvip@research.umass.edu