Novel cationic α-cyano cinnamoyl dyes have the.general formula
in which
R1 is an alkyl or substituted alkyl group;
R2 is a benzyl or substituted benzyl group;
R3 is hydrogen, an alkyl or alkoxy group, or a halogen atom;
n is 2, 3 or 4;
Q is a radical containing a quaternary nitrogen atom; and
A is an anion.
The dyes are particularly useful in the dyeing of unbleached paper pulp. They have excellent substantivity and desired fastness properties.
                            新型阳离子α-
氰基肉桂酰
染料的通式为
其中
R1 是烷基或取代烷基
R2是苄基或取代的苄基
R3 是氢、烷基或烷氧基或卤原子;
n 是 2、3 或 4;
Q 是含有季氮原子的基;以及
A 是阴离子。
这些
染料特别适用于未漂白纸浆的染色。它们具有优异的吸附性和理想的牢度特性。