Process for preparing aqueous dispersion of pigment

Details Process for preparing aqueous dispersion of pigment Process for preparing aqueous dispersion of pigment

1983-11-15

1985-02-19

Cockeram, Herbert S.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308N, 106308Q, 106308R, C09C 100, C09B 100, C04B 3140

Patent

active

045003629

ABSTRACT:
A process for preparing an aqueous dispersion of a pigment is disclosed. The process involves providing a surface active agent having a solubility of 0.1% or less in water at a temperature of about 25.degree. C. The agent is also soluble in an organic solvent. The agent is dispersed in water to provide an aqueous dispersion of the agent. The pigment is then dispersed in the aqueous dispersion of the agent to form the aqueous dispersion of the pigment. The dispersion causes less foaming, aggregation and sedimentation of the pigment particles when the dispersion is stored. The dispersion is particularly useful when utilizing carbon black as the pigment and applying the dispersion to the field of photographic materials. The presence of the surface active agent does not have secondary effects on photographic materials.

REFERENCES:
patent: 3348959 (1967-10-01), Csonra et al.
patent: 4194921 (1980-03-01), Wheeler et al.
patent: 4227936 (1980-10-01), Osswald et al.

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