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US 6,395,804 B1Granted
Polyelectrolyte dispersants for hydrophobic particles in water-based systems
Assignee3M Innovative Properties Company
InventorsPrabhakara Satyauolu Rao, Ahmed Salih Abuelyaman, Babu N. Gaddam
Life of this patent
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Abstract
Dispersants that strongly adsorb to hydrophobic particles in aqueous media are described. The dispersants comprise one or more polyelectrolyte(s) and further comprise a hydrophobic hydrocarbon moiety. Suspensions and inks comprising the dispersants are also described.
Claims24
A water-based pigmented ink comprising a suspension of:
- a) pigment particles, and
- b) a dispersant for dispersing hydrophobic particles in an aqueous system comprising a nonpolymerized hydrophobic segment comprised of a hydrocarbon moiety that can adsorb to hydrophobic surfaces, which hydrophobic segment is joined by a chain transfer agent to at least one terminal hydrophilic segment comprised of a polyelectrolyte.
Dependencies are inferred from the claim text.