POLYMER-ENCAPSULATED PIGMENT NANO-PARTICLES AND METHOD FOR PREPARING SAME
First Claim
1. A method for preparing polymer-encapsulated pigment nano-particles comprising:
- preparing a first dispersion comprising;
particles of a pigment;
a first surfactant; and
a first amount of a solvent;
preparing a second dispersion comprising;
a polymer;
a second surfactant; and
a second amount of the solvent; and
mixing the first dispersion with the second dispersion so as to form a final dispersion comprising;
the polymer;
pigment particles surrounded by the polymer;
the first surfactant;
the second surfactant;
and the solvent.
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Abstract
A method for preparing polymer-encapsulated pigment nano-particles is disclosed. Several steps are involved in creating these polymer-encapsulated pigment nano-particles. One step is to prepare a first dispersion including particles of a pigment, a first surfactant, and a first amount of a solvent. Another step is to prepare a second dispersion including a polymer, a second surfactant, and a second amount of the solvent. Then, the first dispersion and the second dispersion are mixed together so as to form a final dispersion including the polymer, pigment particles encapsulated by the polymer, the first surfactant, the second surfactant, and the solvent. The solvent can then be removed from the aqueous dispersion to form a first solid. In addition, the first and second surfactants can be removed from the first solid to form a second solid. Finally, the second solid can be milled to form particles of pigment encapsulated by the polymer.
8 Citations
15 Claims
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1. A method for preparing polymer-encapsulated pigment nano-particles comprising:
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preparing a first dispersion comprising; particles of a pigment; a first surfactant; and a first amount of a solvent; preparing a second dispersion comprising; a polymer; a second surfactant; and a second amount of the solvent; and mixing the first dispersion with the second dispersion so as to form a final dispersion comprising; the polymer; pigment particles surrounded by the polymer; the first surfactant; the second surfactant; and the solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A charged polymer-encapsulated pigment nano-particle comprising:
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a pigment; a polymer; and a charging agent; wherein the polymer encapsulates the pigment; and wherein the charged polymer-encapsulated pigment nano-particle has a size of from 10 nm to 1,000 nm. - View Dependent Claims (14, 15)
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Specification