2,2-Bis(3-amino-4-hydroxylphenyl)propane (BAP)

Basic Information of BAP

Product Name	2,2-Bis(3-amino-4-hydroxyphenyl)propane
Synonym	4,4'-Isopropylidenebis(2-aminophenol)
Abbreviation	BAP
CAS Number	1220-78-6
Product Type	Hydroxyl-containing aromatic diamine monomer
Molecular Formula	C15H18N2O2
Molecular Weight	258.32 g/mol
Appearance	White to yellow or orange powder or crystal
Purity	≥ 99.5%; batch data should be confirmed when quality documentation is available
Main Application	Hydroxyl-containing, heat-resistant and specialty functional polymer 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 Polymer Design

• Hydroxyl-containing aromatic diamine structure, relevant to specialty polyimide diamine monomers and reactive polymer building blocks.

• Dual amine and hydroxyl functionality may support polyimide, polyamide, polybenzoxazole-related or thermally rearranged polymer design depending on the selected polymer route.

• Aromatic backbone may contribute to molecular rigidity, thermal resistance and mechanical performance in selected high-performance polymer systems.

• Hydroxyl groups may influence polarity, hydrogen bonding, interfacial compatibility and post-reaction behavior depending on formulation and processing conditions.

• Final material properties depend on monomer purity, co-monomer selection, solvent system, reaction conditions and polymer processing method.

Pairing BAP with Dianhydride Monomers

In polyimide synthesis, BAP may be evaluated with selected polyimide dianhydride monomers to design hydroxyl-containing, heat-resistant and specialty functional 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.

Fluorinated dianhydrides such as 6FDA CAS 1107-00-2 may be considered when free volume, gas transport behavior, dielectric behavior or optical properties are part of the target polymer design. Ether-containing dianhydrides such as ODPA CAS 1823-59-2 may help adjust processability and film-forming behavior.

Application Context of BAP in Specialty Polymer Systems

BAP is typically used as a multifunctional monomer rather than a finished application material. It is commonly discussed in hydroxyl-containing polyimides, polybenzoxazole-related materials, membrane research and specialty functional polymer systems, where aromatic rigidity, hydroxyl functionality and reactive modification can influence polymer performance.

• High-temperature polyimide applications – heat-resistant polymer environments and structurally demanding material systems.

• Gas separation and membrane research – hydroxyl-containing polyimide-derived materials may be evaluated where chain packing, free volume and gas transport behavior are important design factors.

• Electronics and semiconductor polyimide applications – dielectric, insulation and thermally stable polymer material requirements.

• Polybenzoxazole-related polymer systems – BAP may be evaluated in research involving o-hydroxy diamine structures and thermally rearranged polymer concepts.

• Specialty functional polymer materials – hydroxyl-containing diamine selection for advanced polymer research and interface-related formulation design.

Related Polyimide Monomer Supply Guides

For a broader technical overview of both diamine and dianhydride monomer families, please review Polyimide Monomers: Diamines and Dianhydrides.

Related Polyimide Monomers

• APBOA / DAPBO CAS 13676-47-6 – heteroaromatic benzoxazole diamine for rigid and heat-resistant PI material design.

• BPDA CAS 2420-87-3 – rigid aromatic dianhydride for low-CTE and high-temperature PI films.

• 6FDA CAS 1107-00-2 – fluorinated dianhydride often considered in transparent, low-dielectric and membrane-related PI systems.

SDS, TDS and Technical Documentation

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