Colored resin particle dispersion, method for producing same, and inkjet ink
AssigneeRiso Kagaku Corporation
InventorsYoshifumi Watanabe, Manami Shimizu
Life of this patent
Estimating the term…
Abstract
A colored resin particle dispersion and an inkjet ink are provided which preferably exhibit excellent rub fastness and alcohol resistance, and yield printed items having high image density. Specifically, a colored resin particle dispersion includes colored resin particles, a basic dispersant and a non-aqueous solvent. The colored resin particles include a colorant, a thermoplastic solid resin and a liquid organic compound having an acidic group, and the thermoplastic solid resin has a polar parameter δp and a hydrogen bonding parameter δh from the Hansen solubility parameters that satisfy δp=2.5 to 11.0 and δh=5.0 to 12.0 respectively is provided.
Claims17
A colored resin particle dispersion comprising colored resin particles, a dispersant and a non-aqueous solvent,
- wherein the colored resin particles comprise a colorant, a thermoplastic solid resin and a liquid organic compound having an acidic group, a basic group, or a combination thereof,
- the liquid organic compound has at least the acidic group when the dispersant is a basic dispersant, and the liquid organic compound has at least the basic group when the dispersant is an acidic dispersant, and
- the thermoplastic solid resin has a polar parameter δp and a hydrogen bonding parameter δh from the Hansen solubility parameters that satisfy δp=2.5 to 11.0 and δh=5.0 to 12.0 respectively.
A method for producing a colored resin particle dispersion,
- the method comprising preparing a resin emulsion by dispersing a dispersion phase containing a colorant, a thermoplastic solid resin and a liquid organic compound having an acidic group, a basic group, or a combination thereof with the thermoplastic solid resin in a melted state in a continuous phase containing a dispersant and a non-aqueous solvent, and
- then cooling the resin emulsion,
- wherein the thermoplastic solid resin has a solubility in the non-aqueous solvent of 3 g/100 g or less, and
- the liquid organic compound has at least the acidic group when the dispersant is a basic dispersant, and the liquid organic compound has at least the basic group when the dispersant is an acidic dispersant.
Dependencies are inferred from the claim text.