Bisphenol a diethyl dianhydride (BPADA) CAS 38103-06-9

Name: Bisphenol a diethyl dianhydride (BPADA) CAS 38103-06-9
Brand: Aure Chemical
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Synonyms: 4,4'-Bisphenol A dianhydride; 4,4'-Bisphenol A diphthalic anhydride; Ultem dianhydride; 4,4'-(4,4'-Isopropylidenediphenoxy)bis(phthalic anhydride); 4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic anhydride; 2,2-Bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride

Shandong Aure Chemical Co., Ltd. is one of the leading suppliers of BPADA in China and also one of the manufacturers of this product.

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Product Details

Aure Chemical Delivers Excellence in BPADA

Bisphenol A dianhydride (BPADA, CAS 38103-06-9) is a bisphenol-based aromatic dianhydride widely used as a monomer in the synthesis of high-performance and optically transparent polyimides. Owing to its bulky isopropylidene structure, BPADA provides excellent solubility, suppressed charge-transfer interactions, balanced thermal stability, and low dielectric characteristics, making it particularly suitable for processing-oriented and flexible polyimide systems.

Basic Information of BPADA

Product Name	Bisphenol A dianhydride
Abbreviation	BPADA
CAS Number	38103-06-9
Molecular Formula	C31H20O8
Molecular Weight	520.49 g/mol
Appearance	White to light yellow powder or crystal
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular Structure

Key Properties

Bulky bisphenol A backbone disrupts molecular packing and suppresses charge-transfer complexes, enabling high optical transparency.
Excellent solubility and broad processing window for poly(amic acid) solutions compared with rigid aromatic dianhydrides.
Moderate glass transition temperature (Tg ~200°C) suitable for flexible and optoelectronic polymer systems.
Low dielectric constant and good electrical insulation performance in derived polyimides.
Compatible with a wide range of aromatic and aliphatic diamines for tuning mechanical and optical properties.

Application Positioning of BPADA

Primary Positioning – Processing-Oriented Polyimide Systems:
BPADA is primarily positioned for processing-oriented polyimide formulations, where solubility, film-forming ability, and controllable viscosity are critical. Its bulky non-planar structure enables easier polymer processing compared with highly rigid dianhydrides such as BPDA or PMDA.

Secondary Positioning – Flexible Films, Coatings, and Adhesives:
BPADA is widely applied in flexible polyimide films, coatings, and adhesive systems , where mechanical compliance, optical clarity, and dimensional stability are required.

Key Applications of BPADA

Processing-Oriented Polyimides:
Used as a solubility-enhancing dianhydride for polyimide systems requiring wide processing windows, controlled molecular weight growth, and uniform film or coating formation.

Flexible Films, Coatings, and Adhesives:
Applied in flexible substrates, protective coatings, and high-performance adhesive formulations where toughness, transparency, and moderate heat resistance are essential.

Optical and Display-Related Polyimides:
Serves as a functional monomer in colorless or low-yellowing polyimides for flexible displays, wearable electronics, and optoelectronic components.

Electronics and Dielectric Materials:
Utilized as a dielectric property modifier in electronic-grade polyimides, particularly where low dielectric constant and processability are prioritized over extreme thermal endurance.

Functional and Research-Oriented Applications:
Explored in membrane materials, specialty coatings, and advanced functional polymers benefiting from chemical inertness and structural stability.

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Packaging, Logistics & Compliance Capabilities

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