申请人:Ciba-Geigy Corporation
公开号:US04182832A1
公开(公告)日:1980-01-08
1,4-Diaminobutanes of the formula ##STR1## in which R.sup.1 is H or --CH.sub.3 and R.sup.2 and R.sup.3 independently of one another are each a radical of the formula ##STR2## in which A is alkyl having 1 to 3 C atoms, --OCH.sub.3, --N(CH.sub.3).sub.2, --Cl or --Br and R.sup.2 also is alkyl having 1 to 3 C atoms, are prepared according to the invention by catalytically hydrogenating succinic acid dinitrile of the formula ##STR3## in the presence of acetic anhydride and hydrolyzing the N,N'-diacetyl-1,4-diaminobutanes thus obtained to diamines of the formula I, which are valuable curing agents for epoxide resins.
根据本发明,制备了式为##STR1##的1,4-二氨基丁烷,其中R.sup.1为H或--CH.sub.3,R.sup.2和R.sup.3分别独立地为式##STR2##的基团,其中A为具有1至3个碳原子的烷基,--OCH.sub.3,--N(CH.sub.3).sub.2,--Cl或--Br,而R.sup.2也是具有1至3个碳原子的烷基,通过在乙酸酐存在下催化氢化顺丁烯二腈##STR3##并水解所得的N,N'-二乙酰基-1,4-二氨基丁烷,制备了式I的二胺。这些二胺是环氧树脂的有价值的固化剂。