Process for the level dyeing of polyacrylonitrile materials of s

Details Process for the level dyeing of polyacrylonitrile materials of s Process for the level dyeing of polyacrylonitrile materials of s

1977-09-01

1980-01-01

Czaja, Donald E.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 25, 8169, 8177AB, 8177R, 8 82, D06P 141, D06P 376, C09B 2938, C09B 1900

Patent

active

041814991

ABSTRACT:
Described is a process for the level dyeing of polyacrylonitrile materials, in which process there is used for dyeing polyacrylonitrile materials that have varying substantivity an aqueous dye liquor containing at least one migrating cationic dyestuff and electrolyte, as well as, optionally, at least one migrating cationic retarder and further additives. This process renders possible a level dyeing of all fibre types of polyacrylonitrile materials by one and the same dyeing method. Generally, no addition of a migrating cationic retarder is necessary. Only in the case of a light-colored dyeing is a very minor addition thereof required. Particularly suitable migrating cationic dyestuffs are those having a more or less delocalized positive charge, the cation weight of which dyestuffs is smaller than 310, the parachor smaller than 750 and the log P (relative lipophil property) smaller than 3.6.

REFERENCES:
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patent: 3632300 (1972-01-01), Komninos
patent: 3716329 (1973-02-01), Komninos et al.
patent: 3726641 (1973-04-01), Komninos
patent: 3785768 (1974-01-01), Walz et al.
patent: 3806504 (1974-03-01), Mundlos et al.
patent: 3945793 (1976-03-01), Corbishley et al.
patent: 4052159 (1977-10-01), Fuerst et al.
Creslan Technical Info. Bulletin, TFS 0530-11, Jun. 1973.
Musterkarte BASF, 1970, pp. 62-68 and 314-329, Musterkarte BASF, 1973.

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