| 摘要 |
<p>A process for dyeing polyacrylonitrile materials in clear, neutral blue shades, which comprises the use of a mixture of an oxazine dye of the formula <IMAGE> (1) and a naphtholactam dye of the formula <IMAGE> (2) in the ratio of 1:3 to 3:1, in which formulae R1 and R2 represent low molecular alkyl radicals, R3 represents a low molecular alkyl radical or an aryl radical, R4 represents hydrogen or a low molecular alkyl radical, each of R5 and R6 represents a low molecular alkyl radical, Y represents a halogen atom and X(-)represents an anion and a dyestuff preparation which contains an oxazine dye of the formula (1) and a naphtholactam dye of the formula (2) in the ratio 1:3 to 3:1.</p> |
