4,4'-Bis(4-aminophenoxy)biphenyl (BAPB) CAS 13080-85-8

Name: 4,4'-Bis(4-aminophenoxy)biphenyl (BAPB) CAS 13080-85-8
Brand: Aure Chemical
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Synonyms: 4,4′-(1,1′-Biphenyl-4,4′-diyldioxy)dianiline; Benzenamine, 4,4′-[[1,1′-biphenyl]-4,4′-diylbis(oxy)]bis-; 4-{[4′-(4-aminophenoxy)[1,1′-biphenyl]-4-yl]oxy}phenylamine; 4,4'-[Biphenyl-4,4'-diylbis(oxy)]dianiline;

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

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Product Details

BAPB CAS 13080-85-8 for High-Performance Polyimide Synthesis

4,4'-Bis(4-aminophenoxy)biphenyl, commonly known as BAPB, is an ether-containing biphenyl aromatic diamine monomer used as a structural building block in high-performance polyimide, copolyimide and specialty polymer synthesis. Its rigid biphenyl core and flexible phenoxy linkages make BAPB relevant to polymer systems where thermal resistance, mechanical strength, processability and film-forming behavior need to be balanced.

BAPB belongs to the broader category of polyimide diamine monomers and is also part of Aure Chemical’s polyimide diamine monomers supply portfolio. It is often considered in heat-resistant, mechanically robust, processable and specialty polyimide material development, depending on the paired dianhydride, formulation and processing conditions.

Basic Information of BAPB

Product Name	4,4'-Bis(4-aminophenoxy)biphenyl
Abbreviation	BAPB
CAS Number	13080-85-8
Product Type	Ether-containing biphenyl aromatic diamine monomer
Molecular Formula	C24H20N2O2
Molecular Weight	368.43 g/mol
Appearance	White to gray or reddish powder or crystal
Purity	≥ 99%; batch data should be confirmed when quality documentation is available
Main Application	Heat-resistant, processable and specialty polyimide synthesis
Package	1 kg/bottle, 20 kg/drum, or customized packaging
Documents	SDS, TDS and available product information upon request
Storage	Keep sealed, dry, and away from moisture
Molecular Structure

Key Features in Polyimide Design

Ether-containing biphenyl diamine structure, relevant to heat-resistant and processable polyimide diamine monomers.
Rigid biphenyl core may support mechanical strength, thermal resistance and dimensional stability depending on the paired dianhydride and polymer architecture.
Phenoxy linkages may improve chain mobility, processability and film-forming behavior compared with fully rigid aromatic structures.
BAPB can be considered in specialty functional polymer formulations where aromatic rigidity and processability need to be balanced.
Final material properties depend on monomer purity, dianhydride selection, solvent system, imidization conditions and polymer processing method.

Pairing BAPB with Dianhydride Monomers

In polyimide synthesis, BAPB may be evaluated with selected polyimide dianhydride monomers to design heat-resistant, processable and mechanically robust PI systems. Rigid aromatic dianhydrides such as BPDA CAS 2420-87-3 or BTDA CAS 2421-28-5 may support thermal resistance and dimensional stability.

Ether-containing dianhydrides such as ODPA CAS 1823-59-2 may further support processability and film-forming behavior, while fluorinated dianhydrides such as 6FDA CAS 1107-00-2 may be considered when dielectric, optical or moisture-related properties are part of the target polymer design.

Application Context of BAPB in Polyimide Systems

BAPB is typically used as a structural diamine monomer rather than a finished application material. It is commonly discussed in heat-resistant, processable, electronic-grade and specialty polyimide material development, where biphenyl rigidity and ether-linkage flexibility can influence polymer performance.

High-temperature polyimide applications – thermal resistance and high-performance polymer environments.
Electronics and semiconductor polyimide applications – dielectric, insulation and thermally stable material requirements.
Flexible and processable polyimide systems – solubility, chain flexibility and film formation considerations.
Specialty functional polymer formulations – ether-containing biphenyl diamine selection for advanced polymer research.

SDS, TDS and Technical Documentation

Aure Chemical can provide SDS, TDS, typical product information and packaging details for BAPB CAS 13080-85-8 upon request. Since no batch COA has been provided for this page, final purity, appearance and batch-specific quality data should be confirmed when available before order confirmation.

Please share the required purity, target specification, quantity, destination country or port, preferred packaging method and required documents so we can review availability, documentation support and export packing options.

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