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CO2-Based Glue

An environmentally friendly epoxy that utilizes CO2 as a starting material

National Energy Technology Laboratory

Contact NETL About This Technology

Weights suspended by plates that are held together with the adhesive
Weights suspended by plates that are held together with the adhesive

Plates held together by adhesive. Weights were suspended from the chain (see other photo).
Plates held together by adhesive. Weights were suspended from the chain (see other photo).

Technology Marketing Summary

This patent-pending technology titled "Poly (Hydroxyl Urethane) Compositions and Methods of Making and Using the Same" is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

The adhesive is a "green," environmentally friendly epoxy that utilizes inexpensive CO2 as a starting material, consists of composites that can be cured either thermally or with light, and has a scalable, high yield manufacturing process.

Problems with existing epoxies:

•They create volatile emissions that are toxic
•They require poisonous chemistries
•They require environmentally nasty chemistries
•They typically require a specific type of curing (toughening/ hardening in material creation process): either heat or light
•They tend to be made from petrochemicals
 
NETL's glue has:
 
•Excellent adhesive properties
  –Exceptionally well with glass and metal
•Environmentally friendly
  –No isocyanates
  –Solvent free
  –Uses CO2 as one of its components
•Simple chemistry, using a mix and cure method to create
•UV or thermal curing
•Can be transparent or light yellow in color
•Mixes well with silica gel
  –Flow properties can be modified easily
•Made from the off the shelf, commercially available components
•An environmentally friendly super glue
•Should cost less to make
 

The adhesive has potential for use in the following markets:

 

•Transportation: Marine, Aerospace, Automotive
  –Glass and metal joints
  –New composites for automotives, aircraft, boats, and housing requires better adhesive/binder properties (decreases weight)
•Automotive manufacturers
•Recreational sporting good producers
•Electronics – anything with a printed circuit board
•Military
•Building materials

 

Description
Polyurethane compounds are useful in many commercial applications, including high-performance adhesives, surface coatings, sealants, binders, hydrogels, and resins. A polyurethane compound is any polymer composed of a chain of organic units joined by carbamate (—NCOO—) links. Polyurethanes are conventionally formed by the reaction of a diisocyanate and polyfunctional compounds in the presence of a catalyst. A major disadvantage of this synthesis method is the use of monomers containing
toxic isocyanate groups. Recent emphasis has been placed on producing polyurethanes without the use of isocyanate through the reaction of a diamine and a molecule having one or more cyclic carbonate functional groups. Compounds resulting from this synthetic route are referred to as poly (hydroxyl urethanes) (PHUs) due to the presence of primary and/or secondary hydroxyl functional groups. The current technology provides a single-step method for the synthesis of crossed-linked PHUs from CO2-based intermediates. Crossed-linked compositions are obtained through the use of cyclic carbonate chemistry involving the reaction of a CO2-derived compound, cyclic carbonate, a thiol, and a compound having two or more amine functional groups. The synthetic
process is efficient, simple, flexible, and scalable allowing for the production of less toxic, non-isocyanate containing PHU composites having adhesive properties.
Benefits

• Synthesis produces environmentally friendly PHU compositions

• Method uses inexpensive CO2 as a starting material
• Single step process allows for cross-linked PHU synthesis without the use of solvents
• Scalable, high yield manufacturing process
• Composites can be cured either thermally or with light
Applications and Industries

High performance polyurethane-based adhesives, surface coatings, sealants, binders, hydrogels, and resins

More Information

Patent Details

U.S. Non-provisional Patent Application No. 13/288,390, titled "Poly (Hydroxyl Urethane) Compositions and Methods of Making and Using the Same" was filed on 11/3/11. U.S. Non-provisional Patent Application No. 14/171,094, titled "Poly (Hydroxyl Urethane) Compositions and Methods of Making and Using the Same" was filed on 2/3/14.

Additional information about this technology is available in the article “Tunable Poly (Hydroxyl Urethane) From CO2-Based IntermediatesUsing Thiol-ene Chemistry” in the Journal of Polymer Science Part A: Polymer Chemistry 2011, 49(9):2024-2032.

Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
PON-13-013PrototypeAvailable03/12/201302/23/2016

Contact NETL About This Technology

To: Jessica Sosenko<Jessica.Sosenko@netl.doe.gov> <techtransfer@netl.doe.gov>