| 摘要 |
<p>1484801 Aryl-azo-pyridine dyestuffs containing phosphonic acid groups IMPERIAL CHEMICAL INDUSTRIES Ltd 23 March 1976 [30 April 1975] 18011/75 Heading C4P Novel azo dyestuffs of the formula A-N=N-Py where A is an aromatic radical containing one or more phosphonic acid groups and Py is the radical of a pyridone coupling component (including substituted pyridones and pyridones with fused-on rings) are prepared by diazotization and coupling using coupling components PyH or PyCONH 2 . They are used to colour, e.g. natural and synthetic polyamide materials and, particularly, natural and regenerated cellulose textile materials.</p> |
