Ink composition

摘要

The invention relates to an ink composition comprising a pigment, an aqueous vehicle, a host compound having a cavity and a surface active agent, wherein the surface active agent is capable of binding to the cavity of the host compound.;The invention further relates to a method for preparing such ink compositions and to a method for applying an image onto a receiving medium using such ink composition.

主权项

1. An ink jet composition for applying an image onto a receiving medium, said receiving medium comprising a hydrophobic surface, the ink jet ink composition comprising:
a pigment; an aqueous vehicle; a host compound, which is a cyclodextrine compound, is soluble or dispersible in the aqueous vehicle and has a cavity capable of hosting a guest compound; a surface active agent, having a first part and a second part, wherein the first part has an affinity towards the cavity of the host compound and is capable of forming a host-guest complex with the host compound and wherein the second part has a hydrophobic character and an affinity towards the hydrophobic surface of the receiving medium, wherein the affinity of the second part towards the hydrophobic surface of the receiving medium is higher than the affinity of the first part towards the cavity of the host compound, and wherein the surface active agent is an alkylphenolethoxylate and wherein the alkyl group of the alkylphenolethoxylate ahs 6-30 carbon atoms.