Pigment compositions and methods of preparation

Details Pigment compositions and methods of preparation Pigment compositions and methods of preparation

1978-02-01

1979-09-04

Griffin, Ronald W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106308M, 260 292UA, 260 296H, 260 4214, 260 4257, C08J 300, C08L 9304, C09C 310

Patent

active

041668111

ABSTRACT:
Easily-dispersible pigment compositions suitable for the coloration of aqueous coating systems are prepared by contacting an aqueous slurry of the pigment with an alkaline solution of an acid resin and acidifying the mixture to insolubilize the resin. A pigment-resin composite is produced in which the pigment particles are effectively coated with the resin. On subsequently contacting the pigment-resin composite with a base, optionally in the vapor phase, the resin is neutralized and the pigment rendered easily dispersible in aqueous coating systems.

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