| 摘要 |
<p>Styryl dyestuffs of the formula An? wherein Q? represents a grouping containing a quaternary nitrogen atom and A represents a bridge member, at least one of the radicals R and R1 denotes a carbocyclic or heterocyclic 5-membered or 6-membered ring optionally bon? via a linking member to the nitrogen atom, or, wi? o-position of ring a, forms a heterocyclic structure of this type, and the second radical can also represent alkyl or alkenyl, or R and R1 together form a 5-membered or 6-membered ring, and A? represents an anion, are suitable for dyeing, enscribing and printing paper and for dyeing and printing synthetic fibres, especially made of polyacrylonitrile, acid-modified polyesters or polyamides.</p> |
