专利号:US-5420351-A 优先权日:1993-11-25 标题 :Aromatic diamine compounds 发明人:SUZUKI OSAMU; YOKOMIZO HIROHIKO; ARAI TAKESHI; NAKAJIMA NAMIKO 权利人:NISSHIN SPINNING 摘要:An aromatic diamine compound represented by formula (1): ##STR1## wherein R 1 and R 2 , which may be the same or different, are each a hydrogen atom or a lower alkyl group; and an aromatic diamine compound useful as an intermediate for the synthesis of the above compound (1), represented by formula (2): ##STR2## The compound (1) alleviates the problems of the prior art, and is unlikely to cause crystallization by heat and has a melting point and a glass transition temperature both higher than those of conventional compounds.