9,9-Bis(4-aminophenyl)fluorene CAS 15499-84-0

Product Name: 9,9-Bis(4-aminophenyl)fluorene (BAPF)

CAS Number: 15499-84-0

Description:

9,9-Bis(4-aminophenyl)fluorene (BAPF) is a high-performance aromatic diamine featuring a rigid, cardo (looped) fluorene group connecting two aniline moieties. Typically available as a white to light yellow crystalline powder, BAPF serves as a crucial diamine monomer in the synthesis of advanced polymers, particularly high-performance polyimides. The incorporation of the bulky fluorene unit imparts exceptional properties to the resulting polymers, including outstanding thermal stability (high glass transition temperature, Tg), good solubility in organic solvents (enhancing processability), low dielectric constant, high refractive index, and excellent optical transparency. We supply high-purity BAPF suitable for demanding applications in electronics, aerospace, and material science.

Properties:

Property	Value
Chemical Formula	C25​H20​N2​
Molar Mass	$348.44\text{g/mol}$
CAS Number	15499-84-0
Appearance	White, off-white, or light yellow powder/crystalline solid
Melting Point	Approx. 235-240
Boiling Point	High boiling point; likely decomposes before boiling at atmospheric pressure
Solubility	Generally insoluble in water; Soluble in NMP, DMAc, DMSO, THF, Chloroform
Synonyms	BAPF, 4,4′-(9-Fluorenylidene)dianiline, 4,4′-(9H-Fluoren-9-ylidene)bis(aniline)
Purity	>99%, Polymer Grade
Storage Conditions	Store in a tightly sealed container in a cool, dry, dark place.

Usage:

9,9-Bis(4-aminophenyl)fluorene (BAPF) is primarily utilized as a diamine monomer:

1. Polyimide Synthesis: Reacted with various dianhydrides to produce high-performance polyimides.
   • Example: Polyimides derived from BAPF are used in the electronics industry for flexible printed circuit boards (FPCBs), insulating layers in integrated circuits, and passivation coatings due to their high thermal stability and low dielectric constant.
   • Example: Used in aerospace applications for lightweight composite materials, high-temperature adhesives, and coatings.
   • Example: Employed in fabricating gas separation membranes due to tailored permeability and selectivity.
2. Other Polymer Synthesis: Can be used as a diamine component in synthesizing other polymers like polyamides and poly(amide-imide)s or as a curing agent for epoxy resins requiring high thermal performance.
3. Research & Development: A key building block in material science for developing novel polymers with specific thermal, optical, dielectric, and mechanical properties.

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