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1.发明授权Process for preparing azo dyestuffs containing 2,4,6-tri-amino-3-(cyano ester or carbonamide)pyridine 失效制备含有2,4,6-三氨基-3-（氰基酯或碳酰胺）吡啶的AZO DYESTUFFS的方法
公开(公告)号：US4038268A
公开(公告)日：1977-07-26
申请号：US496715
申请日：1974-08-12
Applicant: Karl Ludwig Moritz , Karl Heinz Schundehutte
Inventor： Karl Ludwig Moritz , Karl Heinz Schundehutte
IPC: C09B29/42 , C09B31/153 , C09B43/11 , C09B29/36 , C07D213/38
CPC classification number: C09B43/11 , C09B29/3639 , C09B31/153
Abstract: Azo dyestuffs free of sulphonic acid groups and carboxylic acid groups are prepared by coupling a diazo compound with a coupler which is prepared by reacting an organic amine with a pyridinium salt having the formula ##STR1## IN WHICH R is substituted or unsubstituted alkyl, cycloalkyl, aralkyl or aryl; andR.sub.1 is substituted or unsubstituted alkyl or aralkyl. The dyestuffs are suitable for dyeing and printing synthetic materials such as polyolefines, polyvinyl compounds, cellulose acetate and triacetate and polyesters to give yellow to blue dyeings and prints with good fastness properties especially to light and sublimation.
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