Process for the production of readily dispersible preparations o

Details Process for the production of readily dispersible preparations o Process for the production of readily dispersible preparations o

1976-10-08

1978-12-19

Woodberry, Edward M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106308M, 260 17R, 260 4257, C08J 320

Patent

active

041305396

ABSTRACT:
There is described a process for producing readily dispersible, nondusty dye preparations in granulated form, in which process difficultly water-soluble to water-insoluble dyes, pigments or optical brighteners, in a finely dispersed form, and water-insoluble carrier resins from the polyvinylacetal class are added with vigorous shaking or stirring, to a two-phase system composed of water and a polar organic solvent having only limited solubility in the aqueous phase; the organic phase containing the dye and the carrier resin is dissipated by dilution with water; and the particles of the preparation are separated and freed from the aqueous, solvent-containing phase by rinsing and drying; the preparations which contain transferable dyes are especially useful for preparing a printing ink by dispersion in a liquid medium composed of water or of an organic solvent or of a mixture of water and an organic solvent; the printing inks thus obtained are themselves useful for printing paper which can be used in a transfer printing process.

REFERENCES:
patent: 2534136 (1950-12-01), Lantz et al.
patent: 2649382 (1953-08-01), Vesce
patent: 3198647 (1965-08-01), Kress
patent: 3215663 (1965-11-01), Weisberg
patent: 3669922 (1972-06-01), Bartsch et al.
patent: 3925096 (1975-12-01), Karkov
Chem. Absts., vol. 83:194543m, Colored Synthetic Resins, Wegman et al.

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