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US 5,571,850 AGranted
Aqueous dispersions containing cyclopolymer dispersants
AssigneeE. I. Du Pont de Nemours and Company
InventorsSheau-Hwa Ma, San Hoa Thang, Ezio Rizzardo, Graeme Moad
Life of this patent
Estimating the term…
Abstract
Aqueous dispersions which are particularly well suited for use as aqueous jet ink compositions having an aqueous carrier medium which comprises water or a mixture of water and at least one organic solvent, a particulate solid, preferably a pigment, and a cyclopolymer dispersant.
Claims9
A dispersion comprising an aqueous carrier medium, a particulate solid, and a cyclopolymer dispersant consisting essentially of at least one cyclopolymer having the formula:
- ##STR4## with the proviso that either (i) R.sub.1 and R.sub.2 are hydrophobic groups, and X and Y are hydrophilic groups, or (ii) R.sub.1 and R.sub.2 are hydrophilic groups, and X and Y are hydrophobic groups;
- and n is selected such that the weight average molecular weight of the cyclopolymer is in the range of 1,000 to 50,000.
Dependencies are inferred from the claim text.