| 摘要 |
PURPOSE:To provide the titled composition of outstanding high-temperature stability with its pH weakly acidic, containing specified proportion of specific anionic dye and at least one sort of compound selected from Na, K and NH4 salts of formic, acetic, oxalic, boric and phosphoric acids. CONSTITUTION:The objective composition with its pH falling between 4 and 6, containing (A) 5-50wt% of an anionic dye, in the form of free acid, of formula I [X is substituent at site 6, 7, or 8 of naphthalene nucleus, being acylamino of formula N(R1)COR2 (R1 is H or lower alkyl; R2 is lower alkyl or phenyl); Y is H when said acylamino group is substituted at site 6 or 7 of the naphthalent nucleus, but sulfonic acid substituted at site 5 or 6 of said naphthalene nucleus when said group is substituted at site 8 of said nucleus; D is diazo residue] (e.g., of formula II) and (B) 1-5wt% of at least one sort of compound selected from Na, K, and NH4 salts of formic, acetic, oxalic, boric, and phosphoric acids. |
