Process for dyeing polyurethane plastics

Details Process for dyeing polyurethane plastics Process for dyeing polyurethane plastics

1975-07-25

1977-05-31

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 37N, 260 775AM, C08K 523, C08K 543

Patent

active

040269310

ABSTRACT:
A process for dyeing polyurethane plastics is disclosed in which an azo dyestuff derived from an indole or 5-aminopyrazole coupling component and containing at least one group having an active hydrogen atom, e.g. hydroxyl aor amino, is introduced during the reaction forming the polyurethane whereby the dyestuff is bonded to the polyurethane by a covalent bond resulting from reaction of the active hydrogen on the dyestuff with a polyurethane reaction component, e.g. polyisocyanate. The dyed polyurethanes produced by this process having a very high level of fastness, e.g. fastness to bleeding upon overcoating.

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patent: 3278486 (1966-10-01), Meek et al.
patent: 3375240 (1968-03-01), Beffa et al.
patent: 3422063 (1976-02-01), Wolf et al.
patent: 3579498 (1971-05-01), Dunworth
patent: 3600373 (1971-08-01), Zickendraht et al.
patent: 3843625 (1974-10-01), Desai et al.
patent: 3880797 (1975-04-01), Maeda et al.
patent: 3883502 (1975-05-01), Sommer et al.
patent: 3892725 (1975-07-01), Stiot et al.

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