Low VOC web offset heatset inks
AssigneeSun Chemical Corporation
InventorsDavid Klein, Gary F. Dandreaux, Richard R. Durand, Jr., Thierry Frinault, Kenneth Smith
Life of this patent
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Abstract
A web offset heatset printing ink composition having less than about 2 wt. % of volatile organic compounds containing an aqueous polymer latex dispersed in an ink base of a resin, a non-volatile plasticizer, and a pigment and method for preparing same.
Claims26
A web offset heatset ink composition having less than about 2 wt. % of volatile organic compounds comprising an aqueous polymer latex dispersed in an ink base that comprises:
- (a) a resin;
- (b) a non-volatile plasticizer selected from the group consisting of tallate esters;
- and
- (c) a pigment.
A method for increasing drying or setting speed of a web offset heatset ink composition having less than about 2 wt. % of volatile organic compounds and which comprises:
- (a) a resin;
- (b) a non-volatile plasticizer selected from the group consisting of tallate esters;
- and
- (c) a pigment;
- said method comprising adding to said ink composition an aqueous polymer latex.
A method of increasing shelf stability of a Web Offset heatset ink composition which has less than about 2 percent by weight of volatile organic compounds (VOC) and which comprises:
- (a) an ink resin;
- (b) a non-volatile plasticizer selected from the group consisting of tallate esters;
- and
- (c) a pigment;
- said method comprising adding to said ink composition an aqueous polymer latex and a protective colloid which comprises acid functional groups.
Dependencies are inferred from the claim text.