Use of dyes bisazomethiniques to be dyed in the mass of the starting polymers

摘要

The invention relates to the use of compounds of formula (br / (see appended drawing in bopi) & br / in which the core is not substituted or contains 1 or 2 substituents, the cores b and d are not substituted or comprise 1, 2 or 3 substituents and me indicates the nickel or copper, for the dyeing in the mass of starting polymers.