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Purification of 4, 4' Diaminophenyl Ether

IP.com Disclosure Number: IPCOM000038186D
Original Publication Date: 1989-Dec-01
Included in the Prior Art Database: 2005-Jan-31

Publishing Venue

IBM

Related People

Authors:
Arnold, AF [+details]

Abstract

A special recrystallization process has been proposed to purify 4, 4' diaminophenyl ether (DAPE), commonly known as oxydianiline (ODA), prior to its being used to manufacture polyamic acid ethyl ester (PAETE). The method is simple, economical and effective in providing a high quality material free of oxidation products.