Process for the dyeing of polybenzimidazole fibers with anionic

Details Process for the dyeing of polybenzimidazole fibers with anionic Process for the dyeing of polybenzimidazole fibers with anionic

1974-12-27

1976-03-09

Schofer, Joseph L.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

Treating textiles or fibers from synthetic resin or natural...

8162R, 8175, D06P 504, D06P 168, D06P 340

Patent

active

039429504

ABSTRACT:
Heretofore polybenzimidazole fibrous materials have proven to be extremely difficult to dye successfully. The present invention provides an effective route for the achievement of a satisfactorily dyed polybenzimidazole fibrous material. The fibrous material initially is contacted at an elevated temperature with a liquid (e.g., an aqueous emulsion) comprising an organic swelling agent and salicylic acid to form polybenzimidazonium salicylate, and subsequently is dyed with an anionic dyestuff. Complete and uniform dye penetration is made possible through the use of the present process, and the resulting dyed article is capable of resisting dye sublimation when utilized in an environment where elevated temperatures are encountered.

REFERENCES:
patent: 2895948 (1959-07-01), Brinker et al.
patent: 3836500 (1974-09-01), Calundann
Vogel and Marvel, J. Polymer Science, 1961, 50, pp. 511-539.
Burrel, Interchemical Review, Spring 1955.

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