PRINTING INK HAVING ENHANCED GLOSS AND LOWER VISCOSITY
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United States of America Patent
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app pub date -
Jun 28, 2011
filing date -
Jun 29, 2010
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Abstract
This disclosure relates to ink composition, having a viscosity of 0.02-13 Poise, comprising an inorganic pigment surface treated with alumina and at least one silicon based surface treatment selected from the group consisting of polysiloxane and polysiloxane block polymer to form a treated inorganic pigment, wherein the silicon based surface treatment is present in the amount of about 0.3 to about 1%, based on the total weight of the treated inorganic pigment; a binder resin having a glass transition temperature of less than 50° C., and comprising at least one adhesion promoting group; and a solvent based ink vehicle having the following solubility parameters using the MPa1/2 units: σd of greater than about 15.9, a σp of less than about 9.1 and a σh of less than about 12.1. These inks have enhanced gloss and lower viscosity characteristics.
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