Process for the direct production of printing inks
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United States of America Patent
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-
May 31, 1988
Issued Date -
N/A
app pub date -
Apr 9, 1987
filing date -
Mar 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A direct process for the production of a printing ink is carried out in a single vessel and consists essentially of the steps of (1) mixing a pigment slurry with a non-aqueous hydrophobic ink vehicle under agitation and with heating in a mixer equipped with concentrically arranged mixing elements and high-speed impeller blades to transfer the pigment from the aqueous phase to the non-aqueous phase, (2) removing the aqueous phase from the mixer, and (3) adding to the non-aqueous phase in the mixer additional ingredients to produce a press-ready printing ink. The finished ink can then be discharged, for example, through a port in the bottom of the mixer.
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