High-purity epoxy compound and method of producing thereof
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United States of America Patent
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Mar 4, 2014
Grant Date -
Jan 10, 2013
app pub date -
Mar 2, 2011
filing date -
Mar 23, 2010
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Abstract
An epoxy compound of high-purity N,N,N′,N′-tetraglycidyl-3,4′-diaminodiphenyl ether is produced by: an addition reaction step of reacting 3,4′-diaminodiphenyl ether with epichlorohydrin in a polar protic solvent at 65 to 100° C. for 12 hours or longer to form N,N,N′,N′-tetrakis(3-chloro-2-hydroxypropyl)-3,4′-diaminodiphenyl ether; and a cyclization reaction step of reacting the N,N,N′,N′-tetrakis(3-chloro-2-hydroxypropyl)-3,4′-diaminodiphenyl ether with an alkali compound for dehydrochlorination.
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