ABN dispersants for hydrophobic particles in water-based systems
Assignee3M Innovative Properties Company
InventorsPrabhakara Satyauolu Rao, Ahmed Salih Abuelyaman, Babu N. Gaddam
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Abstract
Dispersants that strongly adsorb to hydrophobic surfaces of particles in aqueous media are described. The dispersants comprise a hydrophilic or amphiphilic polymer chain containing ionizable moieties and having a terminal forked hydrophobic segment. Suspensions and inks comprising the dispersants are also described.
Claims26
A dispersant for dispersing hydrophobic particles in an aqueous system comprising a polymer having an ABn structure wherein A is a hydrophilic polymeric segment containing ionizable moieties and is terminated with a multifunctional chain transfer agent, B is a nonpolar nonpolymerized hydrophobic hydrocarbon moiety having a single reactive group, which reacts with the chain transfer agent, n is greater than one, and the B moieties form a forked segment at the CTA-terminated end of the A segment.
A water-based pigmented ink comprising a suspension of:
- a) pigment particles, and
- b) a dispersant for dispersing hydrophobic particles in aqueous systems comprising a polymer having an ABn structure wherein A is a hydrophilic polymeric segment containing ionizable moieties and is terminated with a multifunctional chain transfer agent, B is a nonpolymerized hydrophobic hydrocarbon moiety having a single reactive group, which reacts with the chain transfer agent, n is greater than one, and the B moieties form a forked segment at the CTA-terminated end of the A segment.
The water-based pigmented ink of 15 wherein the pigment particles and dispersant molecules form particle/dispersant composites having diameters of less than 250 nanometers.
Dependencies are inferred from the claim text.