Technologies
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WARF: P130276US02

Environmentally Green Glue


INVENTORS -

Srinivasan Damodaran, Dani Zhu

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing soy flour-based wood adhesive that meets industry standards and is petrochemical-free.
OVERVIEWFormaldehyde-based adhesives have been used to make interior plywood and particle board for decades. These synthetic adhesives, which are derived from petroleum, are inexpensive and perform well. However, unhealthy emissions from such adhesives have been the target of stringent nationwide regulation.

There is a critical, regulation-driven need to find alternatives that work effectively but don’t emit dangerous vapors. Especially desirable is a new type of adhesive made from renewable resources instead of fossil fuels.

Soy protein is one promising candidate. But until now, efforts have failed to yield an adhesive with acceptable strength and water resistance.
THE INVENTIONUW–Madison researchers have developed a process to transform soy flour into a strong, environmentally safe wood adhesive.

In the process, a suitable reagent is used to phosphorylate the flour’s lysine amino acid residues. The phosphorylated flour then is mixed with an oxidizing agent that drives the formation of cross-linking bonds. This improves the flour’s adhesive properties. Unwanted salts created in the process can be removed.

Flours of other legumes and/or oil seed crops (e.g., flax, canola) are suitable as well.
APPLICATIONS
  • New adhesives for plywood, particle board and potentially other products
KEY BENEFITS
  • Realistic substitute for petrochemical glues
  • Good wet/dry binding strength and water resistance
  • Safe, cheap and environmentally ‘green’
  • Could improve LEED status of buildings
STAGE OF DEVELOPMENTThe researchers found that hot pressing wood and the adhesive at 140 degrees Celsius increased wet shear strength to 3.15 MPa, which exceeds the industry standard.
Contact Information
For current licensing status, please contact Mark Staudt at mstaudt@warf.org or 608-960-9845.
The WARF Advantage

Since its founding in 1925 as the patenting and licensing organization for the University of Wisconsin-Madison, WARF has been working with business and industry to transform university research into products that benefit society. WARF intellectual property managers and licensing staff members are leaders in the field of university-based technology transfer. They are familiar with the intricacies of patenting, have worked with researchers in relevant disciplines, understand industries and markets, and have negotiated innovative licensing strategies to meet the individual needs of business clients.