Aqueous inkjet inks containing polymeric binders with components to interact with cellulose

摘要

Disclosed are aqueous inkjet inks containing a polymeric ink additive as a binder. The binder contains a component capable of interacting with cellulose. Certain heterocycles having similar Hansen solubility parameters as cellulose were incorporated into the polymeric binders. Prints from these inks have better durability and optical properties than similar additives that do not have the components capable of interacting with cellulose.

主权项

1. An aqueous inkjet ink comprising a colorant, an aqueous vehicle, and an polymeric ink additive as a binder, wherein said polymeric ink additive is a random or structured polymer and comprises at least three monomers A, B and C; wherein
(a) monomer A is a hydrophobic acrylate monomer; (b) monomer B is a hydrophilic acrylic monomer; and (c) monomer C is an acrylate monomer with the O atom on the ester bonding, either directly or via a linking group containing 1-10 carbon atoms, to a carbon or heteroatom of a monocyclic or bicyclic heterocycle containing N, S or O atoms on the ring, wherein said heterocycle is selected from the group consisting of imidazole, imidazolidinone, oxazolidinone, thiazolidinone, benzotriazole, benzimidazole, triazole, benzotriazole, thiazole, benzothiazole, pyrimidine, pyridazine and glycoside, and wherein the carbon atoms on the ring of said heterocycle are optionally substituted with one or more R1, OR2, SR2 or NR3R4, and the N atom or atoms on the ring of said heterocycle are optionally substituted with R1 or —R5OR2; each R1 is independently C1-C20 alkyl, C3-C20 cycloalkyl or C6-C40 aryl; each R2 is independently H, C1-C20 alkyl, C3-C20 cycloalkyl or C6-C40 aryl; and each R3 and R4 are independently H, C1-C20 alkyl, C3-C20 cycloalkyl or C6-C40 aryl; and each R5 is C1-C5 alkyl.