| 摘要 |
<p>New quinazolone azo pigments are of formula (II) (in which B is H or methyl; Y is Cl or Br; Z is H, Cl or Br; R1 is as Z or NO2; R2 and R3 are H or Cl; X is CN or carbamoyl). (II) have very good fastness to all solvents, and to migration, over-painting and light, giving very brilliant yellow to orange shades, some of them giving very high colour yield and strength, or unusually high covering power. Insolubility and strength are further increased above the similar pigments claimed in DT2219169.</p> |
