Using BTDA in Commercial Applications

Since the early 1970s, the BTDA (3,3’, 4,4’-Benzophenonetetracarboxylicdianhydride)—a dianhydride) — has been manufactured at the JAYHAWK site. Ever since, this chemical has evolved into a flagship product with an established performance edge in the fields of polyimide and epoxy chemistry.

BTDA is a thermal curative. It can enhance the dielectric properties, dimensional stability, and temperature stability of epoxy resins, especially those based on Diglycidyl ether of Bisphenol A (DGEBA). It can enhance glass transmission temperatures (Tg) and impart superior physical, mechanical, and chemical properties as opposed to epoxies cured with other dianhydride or anhydride curatives. It has been demonstrated that BTDA increases Tg by as much as 20-30 °C, resulting in a persistent high-temperature resistance which is unparalleled in epoxy chemistry. This makes BTDA the most suitable curative for various industries with burgeoning complicated mechanical demands. It is possible to synthesize BTDA to varying particle sizes and purities according to a variety of requirements, whereas its modifiable pot life makes for ideal processing conditions.

BTDA is chiefly utilized in powder coating applications, where after co-milling the BTDA and the epoxy, the coating is applied using, for instance, electrostatic spray or fluidized bed techniques. As BTDA is solid, it can be difficult to integrate it into viscous liquid epoxies. Careful observation is required during processing to ensure that the BTDA is sufficiently dispersed before curing. Another method involves pre-blending the BTDA into low viscosity monoanhydrides. The resultant pumpable or pourable paste can be incorporated more easily into liquid resins. The outcome is an epoxy that benefits from the properties imparted by both the monoanhydride and the BTDA.

BTDA Applications

BTDA has an extensive range of commercial applications as a thermal curative for epoxy resins. Traditionally, it holds applications in powder coatings to enhance insulation efficiency and chemical resistance or in adhesive formulations to fix circuits to electronic components. BTDA is also utilized in LED encapsulants, motor varnishes, and wire enamels.

In addition, BTDA can be used as a curative for the epoxy formulation used in syntactic foams for applications that demand high temperature stability and compressive strength, especially in off-shore drilling operations and increasing depths needed to reach identified oil reserves.

BTDA and its blends have been used as curatives in epoxy systems, which, in turn, are used for exterior and interior coatings and primers for shale gas piping, crude oil, and petroleum where the enhanced mechanical and physical properties are vital for service life and performance.

Solutions from JAYHAWK

JAYHAWK has an established history of producing BTDA for use in various applications, including BTDA Polymer Fine, BTDA Microfine, BTDA Flake, and BTDA Ultrapure Flake.

For more information about JAYHAWK BTDA, customers can contact the company. JAYHAWK BTDA is a registered trademark of Evonik Industries AG or its subsidiaries

This information has been sourced, reviewed and adapted from materials provided by Evonik Jayhawk.

For more information on this source, please visit Evonik Jayhawk

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