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US 6,395,805 B1Granted
Dispersion composition and process for production thereof
AssigneeHitachi Maxell, Ltd.
InventorNagayuki Takao
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AssigneeHitachi Maxell, Ltd.
InventorNagayuki Takao
Estimating the term…
An object of the present invention is to provide a dispersion composition which is free from the precipitation problem because of its improved dispersion stability, permits employment of various kinds of organic solvents and insoluble granular materials, is widely utilizable, and is useful as, in particular, a liquid developer or a jet printing ink, in which electrostatic force is utilized. The present invention provides a dispersion composition comprising a dispersion of a granular material in an organic solvent and further comprising a high-molecular weight compound having acidic groups and a high-molecular weight compound having basic groups, at least a part of said high-molecular compounds being insoluble in the organic solvent, and said high-molecular weight compounds being adsorbed on at least a portion of the granular material.
A dispersion composition comprising a dispersion of a granular material in an organic solvent and further comprising a high-molecular weight compound having acidic groups and a high-molecular weight compound having basic groups, at least a part of said high-molecular weight compounds being insoluble in the organic solvent, and said high-molecular weight compounds being adsorbed on at least a portion of the granular material.
A process for producing a dispersion composition which comprises mixing a dispersion prepared by dispersing a granular material in an organic solvent by the use of a high-molecular weight compound having acidic groups, with a solution or dispersion prepared by dissolving or dispersing a high-molecular weight compound having basic groups in an organic solvent incapable of dissolving the high-molecular weight compound having acidic groups, to adsorb the high-molecular weight compound having acidic groups and/or the high-molecular weight compound having basic groups on the granular material.
A process for producing a dispersion composition which comprises mixing a dispersion prepared by dispersing a granular material in an organic solvent by the use of a high-molecular weight compound having basic groups, with a solution or dispersion prepared by dissolving or dispersing a high-molecular weight compound having acidic groups in an organic solvent incapable of dissolving the high-molecular weight compound having basic groups, to adsorb the high-molecular weight compound having basic groups and/or the high-molecular weight compound having acidic groups on the granular material.
Dependencies are inferred from the claim text.