Paper coating composition
AssigneesDow Global Technologies LLC, Rohm and Haas Company
InventorsBrian R. Einsla, Valeriy V. Ginzburg, Lanfang Li, John A. Roper, III, Rebecca Smith, Jian Yang
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Abstract
The present invention relates to a coating composition comprising an aqueous dispersion of a binder and first and second core-shell polymer particles having aqueous neutralized acid cores, wherein the dry bulk density of the first core-shell polymer particles is in the range of 0.25 to 0.5 g/mL; and the dry bulk density of the second core-shell polymer particles is in the range of 0.30 to 0.90 g/mL. The composition of the present invention is useful as an undercoat layer for a thermosensitive recording material.
Claims8
A coating composition comprising an aqueous dispersion of a binder and first and second core-shell polymer particles having aqueous neutralized acid cores, wherein
- a) the first core-shell polymer particles have a diameter in the range of from 1.0 μm to 1.8 μm;
- b) the second core-shell polymer particles have a diameter in the range of from 0.25 μm to 1.0 μm;
- c) the number ratio of the second to the first core-shell polymer particles is in the range of from 1:1 to 20:1;
- d) the diameter of the second core-shell polymer particles is in the range of from 15 to 65% of the diameter of the first core-shell polymer particles;
- e) the dry bulk density of the first core-shell polymer particles is in the range of 0.25 to 0.5 g/mL;
- and
- f) the dry bulk density of the second core-shell polymer particles is in the range of 0.30 to 0.90 g/mL.
Dependencies are inferred from the claim text.