Flushed pigments and method for making flushed pigments
AssigneeArizona Chemical Company
InventorsZheng Lu, Thomas C. Jordan
Life of this patent
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Abstract
The specification discloses a method for treating a pigment presscake containing pigment and water to remove the water therefrom. The method is carried out by contacting the presscake with a flushing agent containing an uncatalyzed or acid catalyzed rosin ester and an ink oil to provide a mixture containing the pigment, the flushing agent and water which is then separated from the mixture by well known separation techniques such as decanting to provide a flushed pigment. The specification also discloses a flushing agent and an ink composition containing the uncatalyzed or acid catalyzed rosin ester.
Claims36
A method for treating a presscake containing pigment and water which comprises contacting the presscake with a flushing agent containing ink oil, a rosin ester made in the absence of a basic catalyst and, optionally, a water breakout aid to provide a mixture which contains water, the pigment and the flushing agent, and separating water from the mixture.
A flushed pigment composition for use in making ink which comprises a pigment and a flushing agent wherein the flushing agent comprises a rosin ester made in the absence of a basic catalyst, an ink oil and, optionally, a water breakout aid, wherein the composition is substantially free of water.
A method for treating a presscake containing pigment and water which comprises contacting the presscake with a flushing agent containing ink oil, an acid catalyzed or uncatalyzed rosin ester and, optionally, a water breakout aid to provide a mixture which contains water, the pigment and the flushing agent, and separating water from the mixture.
A method for making an ink composition comprising combining a pigment composition containing pigment and a flushing agent containing a rosin ester made in the absence of a basic catalyst and an ink oil with a material selected from the group consisting of a water breakout aid, an ink varnish and a wax compound.
A flushed pigment composition for use in making ink which comprises a pigment and a flushing agent wherein the flushing agent comprises an acid catalyzed or uncatalyzed rosin ester, an ink solvent and, optionally, a water breakout aid, wherein the composition is substantially free of water.
Dependencies are inferred from the claim text.