Dihydropyridazine Antioxidants

Case ID:

This invention is the use of dihydropyridazines as antioxidants to remove free radicals, prevent degradation of peroxides, block ultraviolet light, and limit ionizing radiation. 1,4-dihydropyridazines with any number of substituents at the 3, 6- positions or 4,5- positions can generate a variety of antioxidants.


The main reason for the failure of elastomers, thermoplastics, and thermosets are related to polymer degradation from oxidation. Antioxidants can delay this failure and the main focal point of innovation. There is an opportunity and need to increase the time a polymer can survive oxidative degradation and reduce potential health and environmental issues.



  • Plastics/rubber industry
  • Food industry
  • Cosmetics
  • Pharmaceuticals
  • Fuel industry


  • Reduces solubility limitation
  • Limits concern of higher concentrations resulting in adverse effects
  • Extended protection and potential recycling of antioxidant use
  • Can delay oxidation ten times longer than an equivalent amount of BHT

Status: issued U.S. patent #10,851,192

Patent Information:
Contact For More Information:
Tariq Ahmed
Sr Licensing Manager, College of Engineering
The University of Arizona
Lead Inventor(s):
Douglas Loy
Robb Bagge