Explore Top-Quality α-BPDA for Optical Polyimide Systems
2,3,3',4'-Biphenyltetracarboxylic dianhydride (α-BPDA, CAS 36978-41-3) is an asymmetric aromatic
dianhydride monomer specifically designed for advanced polyimide systems where optical
transparency and thermal performance must be balanced. Its non-symmetrical molecular structure
effectively suppresses intermolecular charge-transfer interactions, enabling the synthesis of
transparent, low-color polyimides with high glass transition temperatures and excellent
dimensional stability.
Basic Information of α-BPDA
| Product Name | 2,3,3',4'-Biphenyltetracarboxylic dianhydride |
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| Abbreviation | α-BPDA |
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| CAS Number | 36978-41-3 |
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| Molecular Formula | C16H6O6 |
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| Molecular Weight | 294.22 g/mol |
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| Appearance | White to off-white powder or crystal |
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| Purity | ≥99% |
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| Package | 1kg/bottle, 20kg/drum, or customized |
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| Molecular Structure |  |
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Key Properties
Suppressed charge-transfer interactions leading to improved optical transparency
High glass transition temperature combined with better processability than symmetric BPDA
Excellent thermal stability, mechanical strength, and chemical resistance
Suitable for transparent dielectric films and low-color polyimide systems
Effective polymerization with aromatic diamines to form high molecular weight polyimides
Application Positioning of α-BPDA
α-BPDA is primarily positioned for
optical and transparent polyimide systems ,
where reduced coloration, high thermal stability, and dimensional reliability are required.
It is widely selected for transparent polyimide films, optical substrates, and advanced
dielectric layers used in optoelectronics and display-related applications.
As a secondary application, α-BPDA is used in
electronics and dielectric materials ,
including flexible electronic substrates, low signal-loss insulating films, and
high-temperature dielectric layers for microelectronic devices.
Advanced and Emerging Applications
Covalent Organic Frameworks (COFs):
Enables low-dielectric COF materials with low thermal expansion and high breakdown strength
for semiconductor packaging and telecommunications research.
Luminescent and Functional Materials:
Used in diimide-based luminescent systems and functional polymers for sensing,
photonic devices, and advanced material research.
COA / TDS / MSDS are available upon request.
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