Polyols from Elemental Sulfur and Elastomeric Polyurethanes

Case ID:

This invention consists of novel sulfur-based polyol polymers which are highly soluble in polar organic solvents and are made in a single chemical step from elemental sulfur. This chemistry enables new polyurethane compositions from sulfur comonomers. The method of synthesis can be easily scaled to large-scale production, and can be processed into water or polar solvent-based formulations. The material may be sprayed or processed into films. Various product families can be made with available polymers used as termonomers.   


Research efforts have been directed towards exploiting the special high-performance characteristics of polymers with sulfur in the backbone. Sulfur is a byproduct of refining petroleum which has limited use and is being stockpiled. Sulfur polymers have the potential for reducing the amount of hydrocarbons required for plastic production.



  • Thermosetting polymer
  • Polyurethanes
  • Flame retardant


  • Tuneable properties with termonomers
  • High solubility in water and polar solvents for ease of formulation in sprays or films
  • Re-use sulfur waste product from petroleum refining into high value polymer

For related flame retardant polymer technologies, see

Patent Information:
Contact For More Information:
Laura Silva
Sr. Licensing Manager, COS
The University of Arizona
Lead Inventor(s):
Kyung-Seok Kang
Dong-Chul Pyun
Taeheon Lee