Hot melt ink for ink jet printers
AssigneeBrother Kogyo Kabushiki Kaisha
InventorMasaya Fujioka
Life of this patent
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Abstract
A hot melt ink for an ink jet printer comprises 50 wt. % or more of a solid wax that is solid at normal temperatures and has a solubility parameter of not larger than 9.00, an organic substance having a solubility parameter greater than that of the solid wax, a polymer material that is miscible with at least one of the solid wax and the organic substance and which has a weight average molecular weight of not less than 500, and a coloring material. The hot melt ink exhibits good dispersability and dispersion stability of the coloring material with good heat stability and color fastness to light.
Claims21
A hot melt ink for an ink jet printer, comprising:
- a solid wax that is solid at normal temperatures, the solid wax having a solubility parameter equal to or less than 9.50, the solid wax being present in an amount of 50% by weight or more;
- an organic substance that is miscible with the solid wax, the organic substance having a solubility parameter greater than that of the solid wax;
- a polymer material that is miscible with at least one of the solid wax and the organic substance, the polymer material having a weight average molecular weight of 500 or more;
- and
- a coloring material.
A hot melt ink for an ink jet printer, comprising:
- a solid wax that is solid at normal temperatures, the solid wax having a solubility parameter equal to or less than 9.50, the solid wax being present in an amount of 50% by weight or more, wherein the standard deviation of the solid wax's molecular weight distribution in the number of carbon atoms is 3.3 or less;
- an organic substance that is miscible with the solid wax, the organic substance having a solubility parameter greater than that of the solid wax;
- a polymer material that is miscible with at least one of the solid wax and the organic substance, the polymer material having a weight average molecular weight of 500 or more;
- and
- a coloring material.
Dependencies are inferred from the claim text.