Low VOC web offset heatset inks
First Claim
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1. 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.
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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.
100 Citations
26 Claims
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1. 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:
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(a) a resin; (b) a non-volatile plasticizer selected from the group consisting of tallate esters; and (c) a pigment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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:
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(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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. 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:
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(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. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification