Ink-jet ink compositions based on oil-in-water microemulsion forming nanoparticles upon application on a surface
AssigneeYissum Research Development Company of the Hebrew University of Jerusalem
InventorsShlomo Magdassi, Matti Ben-Moshe
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Abstract
An Ink-jet ink composition for piezoelectric in-jet printing comprising: (a) a hydrophobic dye; (b) an oil-in-water microemulsion including: (i) a volatile oil; (ii) water; (iii) a co-solvent; (iv) at least one surfactant; and (v) a binder, wherein upon application of the ink to a substrate surface, the volatile oil evaporates and nanoparticles are formed. The invention additionally discloses a printing process using the ink composition.
Claims25
An ink-jet composition for piezoelectric ink-jet printing comprising:
- (a) a thermodynamically stable oil-in-water microemulsion including:
- (i) a volatile oil;
- (ii) water;
- (iii) a co-solvent;
- (iv) at least one surfactant;
- (v) a binder;
- and
- (b) a hydrophobic dye dissolved in oil droplets of the composition;
- wherein the hydrophobic dye is present only in the oil droplets of the composition;
- wherein the oil droplets consist essentially of the volatile oil and the dye;
- and
- wherein upon application of the ink to a substrate surface, the volatile oil evaporates and nanoparticles composed of the dye molecules are formed.
A printing process which comprises printing on a substrate surface with an ink jet composition, which comprises:
- (a) a thermodynamically stable oil-in-water microemulsion including:
- (i) a volatile oil;
- (ii) water;
- (iii) a co-solvent;
- (iv) at least one surfactant;
- and
- (v) a binder;
- and
- (b) a hydrophobic dye dissolved in the oily phase of the emulsion;
- wherein the hydrophobic dye is present only in the oil droplets of the composition;
- wherein the oil droplets consist essentially of the volatile oil and the dye;
- and
- wherein upon application of the ink to a substrate surface, the volatile oil evaporates and nanoparticles composed of the dye molecules are formed.
Dependencies are inferred from the claim text.