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Synthesis of 2-(4-aminophenyl)-3H-benzimidazol-5-amine CAS NO: 7621-86-5:

(4-aminophenyl)-3H-benzimidazol-5-amine CAS NO: 7621-86-5  was prepared by removing hydrogen chloride from 1,2,4- traminobenzene hydrochloride and para-aminobenzoic acid after purification with poly - phosphoric acid as solvent and P2O5 as catalyst.

A high temperature resistant soluble and fusible polyimide resin can be prepared by 2-(4-aminophenyl)-3H-benzimidazol-5-amine CAS NO: 7621-86-5.The Specific methods include: the bisphenol A type two ether dianhydride and 2-(4-aminophenyl)-3H-benzimidazol-5-amine CAS NO: 7621-86-5 and imidazole under nitrogen protection in the mixed organic solvent under reflux temperature conditions get polyamide acid - polyimide hybrid solution polymerization, the polyamide acid - polyimide solution into the mixture containing polymer in high speed tissue comminuter settling out agent settling out dolly, and then in turn to the suction filter washing the suction filter vacuum drying as well as that of thermal get high-temperature fusible soluble polyimide resinThe polyimide resin of the invention not only has excellent solubility and melt fluidity, but also has excellent high temperature resistance with long-term service temperature up to more than 230℃.

Name: 2-(4-aminophenyl)-3H-benzimidazol-5-amine   

CAS NO: 7621-86-5

Purity: 97% min

MF: C13H12N4

MW:224.26100

BP:545.5?C at 760 mmHg

Density:1.359 g/cm3

MP: N/A

EINECS:231-538-6

Appearance: Light yellow or brown

Package: 25g, 100g, 500g, bulk package 

Application:365bet娱乐 intermediate

Other name:

1H-Benzimidazol-5-amine, 2-(4-aminophenyl)-;

Benzimidazole, 5-amino-2-(p-aminophenyl)-;

5-amino-2-(p-aminophenyl)benzimidazole;

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