| 摘要 |
PROBLEM TO BE SOLVED: To provide: improved colorants suitable for use in phase change inks that are natural or derived from natural sources and thus environmentally friendly; and phase change ink compositions containing suitable composite materials that contain natural-based materials and/or biodegradable materials.SOLUTION: A phase change ink composition includes: a wax; an optional dispersant; an optional synergist; and a naturally-derived colorant, which is either a colorant derived from a plant, a colorant derived from an insect, or a mixture or combination thereof. The naturally-derived colorant is derived from a member of the group consisting of tetrapyrroles, tetra-terpenoids, quinines, O-heterocyclic compounds, N-heterocyclic compounds, metallo-proteins, or a mixture or combination thereof. The synergist is indigocarmine or the like modified using an aliphatic or aromatic quaternary ammonium compound. |
