1,2,4,5-Cyclohexanetetracarboxylic Dianhydride (CAS 2754-41-8), commonly known as HPMDA (Hydrogenated Pyromellitic Dianhydride), is a non-aromatic alicyclic tetracarboxylic dianhydride widely used as a key monomer in the synthesis of high-performance polymers. Owing to its unique cyclohexane-based structure, HPMDA enables the production of polyimides and other engineering polymers with excellent optical transparency, low dielectric constant, high thermal stability, and superior mechanical performance.
Compared with conventional aromatic dianhydrides such as PMDA, HPMDA significantly reduces intermolecular charge-transfer interactions, resulting in colorless or light-colored polyimides that are highly desirable for next-generation electronic and optical applications.
Chemical Characteristics
HPMDA is typically supplied as a white crystalline powder with high purity and excellent reactivity. Its two anhydride groups readily react with diamines, amino alcohols, and polyols to form high-performance polymers including polyimides, polyamide-imides, and branched polyesters.
The alicyclic backbone offers several advantages over aromatic structures:
These characteristics make HPMDA an ideal monomer for advanced polymer systems requiring both durability and optical performance.
Applications
Transparent Polyimides
HPMDA is one of the most important monomers for manufacturing transparent polyimide films. These materials combine excellent heat resistance with outstanding optical clarity and are increasingly used in flexible electronics and display technologies.
Electronic Materials
Polyimides derived from HPMDA are widely applied in:
Its low dielectric constant also makes HPMDA suitable for high-speed communication devices and advanced electronic packaging.
Aerospace and High-Performance Composites
The excellent thermal stability and mechanical strength of HPMDA-based polymers make them attractive for aerospace composites, high-temperature adhesives, protective coatings, and structural materials operating under demanding conditions.
Optical and Functional Films
Because HPMDA minimizes polymer coloration, it is widely used in the preparation of:
Branched Polyesters
In addition to polyimides, HPMDA serves as an important building block for branched polyester materials that exhibit enhanced mechanical properties, thermal resistance, and chemical durability.
Advantages of HPMDA
Why Choose UCHEM?
UCHEM supplies 1,2,4,5-Cyclohexanetetracarboxylic Dianhydride (CAS 2754-41-8) with high purity and consistent quality for research and industrial production. Our manufacturing capabilities ensure stable supply, strict quality control, and flexible packaging to meet the needs of laboratories, pilot plants, and commercial manufacturers worldwide.
Whether you are developing transparent polyimides, flexible electronic materials, or high-performance engineering polymers, UCHEM is your reliable partner for premium HPMDA products.
