Formulating Tips for Epoxy-Anhydride Cure Systems 8: Understanding BTDA Blends

August 15, 2019by Jayhawk0
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Curing a basic DGEBA epoxy resin with a monoanhydride and dianhydride blend improves the thermal stability of your epoxy-based parts when operating in aggressive service environments. You are also able to adjust the blend to meet specific processing conditions while achieving a favorable cost position.
Accomplishing this requires careful consideration of specific parameters, including:

  • Selection of the anhydrides
  • Dianhydride/monoanhydride ratio
  • Accelerator selection and dosing level
  • Cure schedule

The Advantages of BTDA Blends

BTDA/NMA blends are an intriguing example of a dianhydride and monoanhydride combination that can deliver high-quality results. They also address the incorporation of a solid dianhydride into a liquid epoxy resin without resorting to solvents or diluents. If you are willing to take the time to formulate correctly, you can leverage blended epoxy-anhydride cure systems to gain a competitive advantage. In the video below, our experts discuss BTDA/NMA blends in greater detail.

Are you looking for more technical data on BTDA/NMA formulations? Do you have any other questions or comments on curing epoxy resins with anhydrides? Please reach out to us, we are happy to help.

Epoxy-Anydride Formulating Tips from the Experts

Jayhawk Fine Chemicals, Crosslink Technologies, Evonik and Dixie Chemicals performed a study on a variety of BTDA and NMA blends, with an emphasis on accelerator selection. A detailed presentation can be found here.

If you missed our last video, Formulating Tips for Epoxy-Anhydride Cure Systems 7: Pushing the Envelope, be sure to give it a watch. You can subscribe to our YouTube channel using the link below to get notifications with each new release.


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