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US 7,811,470 B2Granted
Water based colorants comprising semiconductor nanocrystals and methods of making and using the same
AssigneeEvident Technologies
InventorsJames Hayes, Luis Sanchez
Life of this patent
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Abstract
A water based colorant that includes a polymer emulsion and semiconductor crystals capable of emitting light. The colorants include paints, inks and/or dyes can be applied to various substrates.
Claims9
A water-based colorant comprising:
- an emulsion comprising a plurality of droplets dispersed in an aqueous phase wherein the droplets comprise semiconductor nanocrystals dispersed in a hydrophobic liquid to form a hydrophobic phase and the aqueous phase comprises a plurality of polymers dispersed in water, wherein the plurality of polymers have hydrophilic functional groups that interact with the aqueous phase and hydrophobic moieties that interact with the hydrophobic phase and are chosen from the group consisting of:
- polyvinyl acetate polymer, polyvinyl alcohol polymer, and polyacrylic acid polymer or an ester thereof.
Dependencies are inferred from the claim text.