Process for the production of dustfree granules of dyes and opti

Details Process for the production of dustfree granules of dyes and opti Process for the production of dustfree granules of dyes and opti

1978-04-14

1980-10-14

Schofer, Joseph L.

Bleaching and dyeing; fluid treatment and chemical modification

Dry dye composition other than mere mixture of two or more...

8582, 8594, 25230121, 25230132, D06P 164, C09B 6700, C09K 1102

Patent

active

042278805

ABSTRACT:
Described is a process for the production of solid dustfree preparations of water-soluble dyes and optical brighteners, which process comprises subjecting the pulverulent dyes or optical brighteners, together with a melt or a solution of ethylene carbonate or propylene carbonate, to a dynamic treatment. The preparations obtained have in particular the advantage that the dust-binding effect is retained undiminished over a long period of time, and that they are completely soluble when used in aqueous baths of dyes or optical brighteners.

REFERENCES:
patent: 2181800 (1939-11-01), Crossley
patent: 2477165 (1949-07-01), Bergstrom
patent: 3069218 (1962-12-01), Hermes
patent: 3069221 (1962-12-01), Hermes
patent: 3070418 (1962-12-01), Bann et al.
patent: 3529927 (1970-09-01), Ulrich
patent: 3630664 (1971-12-01), Nentwig et al.
patent: 3791787 (1974-02-01), Yamada et al.
patent: 4058480 (1977-11-01), Lohmann

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