BTDA (3,3’, 4,4’-Benzophenonetetracarboxylicdianhydride) is a dianhydride that has been manufactured since the early 1970s at CABB's Jayhawk site. Since then, it has developed into a flagship product with a demonstrable performance edge in the applications of polyimide and epoxy chemistry.
Image Credit: CABB Group GmbH
BTDA is a thermal curative that can enhance dimensional and thermal stability, and improve dielectric features of epoxy resins, specifically those based on DGEBA (Diglycidyl ether of Bisphenol A).
It can contribute to optimized glass transition temperatures (Tg) and superior mechanical, physical, and chemical characteristics in aggressive thermal and chemical environments.
BTDA has been shown to enhance epoxy Tg by up to 20 to 30 °C in basic DGEBA resins. This provides sustainable high temperature resistance, more typical of multifunctional epoxy resin chemistries.
As BTDA is a solid, it is especially suited for dry formulations including powder coatings. For liquid epoxy resins (LERs), careful attention to mixing is required. This can be facilitated by pre-blending BTDA into low viscosity monoanhydrides. The pumpable or pourable paste created is simpler to add into LERs. Processing and properties can be further enhanced with accelerator selection, providing snap- or latent-cure systems.
BTDA, when used as a thermal curative for epoxy resins, has a wide range of commercial applications.
Its traditional use in powder coatings has since expanded into formulations for adhesives, composites, encapsulants, wire enamels, and motor varnishes.
For applications that demand temperature stability and high compressive strength, BTDA can also be used as a curative for epoxy resins used in syntactic foams. This is particularly beneficial for deepwater drilling where increasing depths are required to extract oil and gas reserves.
Solutions from CABB
CABB has a demonstrated history of producing JAYHAWK BTDA for use in various applications. Multiple grades are available, including JAYHAWK BTDA Polymer Fine, Flake, Microfine and Ultrapure. Please contact CABB for further information.
*BTDA is a registered trademark of Jayhawk Fine Chemicals Corporation
This information has been sourced, reviewed and adapted from materials provided by CABB Group GmbH and Nexam Chemical AB.
For more information on this source, please visit CABB.