Process for granulating pigment compositions

Details Process for granulating pigment compositions Process for granulating pigment compositions

1978-03-24

1979-10-09

McCarthy, Helen

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288B, 106288Q, 106308Q, 106308C, 106308F, 106308N, 106308M, C09C 308

Patent

active

041704878

ABSTRACT:
A process for producing a pigment or dyestuff composition in the form of dustless readily-dispersible granules which comprises contacting, with agitation, an aqueous dispersion of a pigment, a protective colloid, an aliphatic or araliphatic amine which is liquid at temperatures below 100.degree. C., insoluble in water at pH values above 7, and soluble in water at pH values below 7, and an organic carrier, the pH value being first above 7, maintaining the temperature above the melting point of the amine compound, and reducing the pH to below 7 to render the amine compound soluble in water, and recovering the resulting granules.

REFERENCES:
patent: 2822337 (1958-02-01), Evans
patent: 4001035 (1977-01-01), Ito et al.
patent: 4015999 (1977-04-01), Robertson et al.
patent: 4036652 (1977-07-01), Rothmayer
patent: 4055439 (1977-10-01), Babler
Kirk-Othmer-Encyclopedia of Chem Tech-vol. 2, (1964), pp. 416, 418-419, 600; Suppl. vol. (1972), pp. 888, 889, 896.

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