2,2-Bis[4-(4-aminophenoxy)phenyl]propane

2,2-Bis[4-(4-aminophenoxy)phenyl]propane (BAPP), also known as 4,4'-(4,4'-Isopropylidenediphenyl-1,1'-diyldioxy)dianiline, is a diamino monomer with a diphenoxy-phenyl core. Since the molecule has two amine groups at both ends, it can be cross-linked with carboxylic acids or carboxylic dianhydrides to synthesize polyimides. It is commonly as a monomer for the preparation of polyimides in application of batteries, fuel cells, low dielectric materials and OLEDs.

4,4'-(4,4'-Isopropylidenediphenyl-1,1'-diyldioxy)dianiline (2,2-Bis[4-(4-aminophenoxy)phenyl]propane) is white solid

4,4'-(4,4'-Isopropylidenediphenyl-1,1'-diyldioxy)dianiline is used for preparation polyimide and epoxy resin material.

It is applied in pharmaceutical industry.

2,2-Bis[4-(4-aminophenoxy)phenyl] propane (BAPP) can be used for:
(1) Preparation of polyimides. The glass transition temperature of this new polyimide is about 225-230°C. It has the typical yield of thermoplastic polymers. It has a typical thermoplastic polymer yield behaviour, which is very different from other polyimides. The elongation at break was 6% and 29% for polyamide and polyimide, respectively.
(2) Curing epoxy resin (ER) and poly(-caprolactone) (PCL) for the preparation of crystalline thermoset blends.
(3) Constructing dental resin composites.

2,2-Bis[4-(4-aminophenoxy)phenyl]propane (BAPP), as a monomer to prepare polyimide, was synthesized from Bisphenol A and p-chloronitrobenzene via the nucleophilic substitution reaction^[1].

[1] CUILI KONG. Synthesis, Structures and Properties of Polyimide Based on 2,2′‐Bis(4‐aminophenoxy phenyl) Propane[J]. Journal of Macromolecular Science, Part A, 2006. DOI:10.1080/10601320600941086.