Process for the direct production of printing inks
AssigneeSun Chemical Corporation
InventorsRussell J. Schwartz, James Keightley
Life of this patent
Estimating the term…
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.
Claims17
A direct process for the production of a printing ink that is carried out in a single vessel and consists essentially of the steps of (1) mixing under agitation a pigment slurry which contains about 0.5 to 15 percent of pigment with a non-aqueous hydrophobic ink vehicle in a mixer equipped with concentrically arranged mixing elements and high-speed impeller blades and heating to transfer the pigment from the aqueous phase to the non-aqueous phase, (2) removing the aqueous phase from the mixer, and (3) adding additional ink-making ingredients to the mixer to produce a press-ready printing ink.
A direct process for the production of a printing ink that is carried out in a single vessel and consists essentially of the steps of (1) mixing under agitation an organic pigment slurry that contains about 0.5 to 15% of pigment with a non-aqueous hydrophobic ink vehicle, wherein the ratio of amount of pigment and hydrophobic vehicle is in the range of about 3:1 to 1:4 pigment:vehicle, in a mixer equipped with concentrically arranged mixing elements and high-speed impeller blades and heating to transfer the pigment from the aqueous phase to the non-aqueous phase, (2) removing the aqueous phase from the mixer, and (3) adding additional ink-making ingredients to the mixer to produce a press-ready printing ink which contains about 5 to 65% of pigment.
Dependencies are inferred from the claim text.