Process for the dyeing of thermoplastics in the melt

Details Process for the dyeing of thermoplastics in the melt Process for the dyeing of thermoplastics in the melt

1976-03-30

1977-09-27

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

2603261, C08K 524

Patent

active

040510999

ABSTRACT:
Process for the dyeing of thermoplastics in the melt, which process comprises the use of dyestuffs of the formula ##STR1## wherein X.sub.1 - X.sub.4 represents H-atoms or halogen atoms, or one or two of the radicals X.sub.1 - X.sub.4 represent alkyl, alkoxy, phenyl or phenoxy groups, and those remaining represent H-atoms, R.sup.1 and R.sup.2 represent radicals of methylene-active compounds, or radicals of the formula .dbd.N--A wherein A stands for the radical of an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic amine or hydrazine, whereby, provided that R.sup.1 and R.sup.2 represent radicals of the formula .dbd.N--A, one A represents a heterocyclic radical containing N-atoms, optionally together with O- or S-atoms.

REFERENCES:
patent: 3385864 (1968-05-01), Pugin et al.
patent: 3483213 (1969-12-01), Pugin et al.
patent: 3758497 (1973-09-01), Pugin et al.
patent: 3923806 (1975-12-01), Bock et al.

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