| 摘要 |
Mass dyeing of synthetic polyamides is effected using benzoxanthene or benzothioxanthene dyes of formula (I): In the formula, X is O or S; R1 to R4 are H, halogen, OH, NO2, 1-4C alkyl or alkoxy; B is 1-6C alkylene, cyclohexylene, a -NH-, -NHSO2-, -OCH2-, or -OCH2CH2- gp., trivalent N or an opt. substd. benzene or naphthalene ring; D is a di- or tri-valent benzene or naphthalene group, an ester, amide or acyl group of an aromatic carboxylic acid with 1 or 2 rings or 1-5C aliphatic carboxylic acid, an aliphatic sulphonamide group with up to 5C atoms, or aromatic sulphonamide group with 1 or 2 rings; W is a water-solubilising group attached to B or D, consisting of -SO3H, -OSO3H, -SSO3H, -OPO3H2, -PO(OH)2 or -PO(OR5)OH; R5 is lower alkyl or benzyl; m is 2 or 2; and n is 0 or 1. Excellent stability at high temps. is obtd., esp. in the reducing polyamide melt, in which they retain their fastness. Dyes give strong, brilliant yellow shades, which can be combined with blue dyes to give green shades. |
