| 摘要 |
<p>Dyeing, including spin-dyeing, or printing polyacrylonitrile, polyvinylidene cyanide, synthetic anionically modified polyamides or polyesters, or blends, while reserving wool, natural polyamides and cotton, colouring paints, but esp. dyeing carpets to fast shades takes place with dyes of formula D-N=N-K-Z (where D is a 5- or 6-membered heterocycle free from o-fused aromatic rings and contg. 1 quaternised ring N atom linked to ring C atom bonded to azo dye bridge via a double bond or 2 conjugated double bonds; K is a benzene or naphthalene gp. carrying in o-position to azo bridge, an electronegative substituent with >= + 0.25 gamma para Hammet substituent const.; and Z is a primary, sec. or tert. amino gp. in p-position to azo bridge).</p> |
