E.i. Dupont De Nemours and Company

Dupont Electronics, Inc.

C Chad Roberts

Patrick F McIntyre

Christian Jackson

Xiaoqing Li

Robert P Held

Michael Stephen Wolfe

Waifong Liew Anton

Hari Babu Sunkara

Charles T Berge

Gregory R Schulz

James A Silver

Tristan Williams

Robert Paul Held

Harry Joseph Spinelli

The present disclosure provides an ink fluid set containing an aqueous pretreatment composition and an aqueous inkjet ink. This ink fluid set is particularly suitable for printing on offset coated media.

Ink fluid set for printing on offset media

The present disclosure provides an ink for inkjet printing. The ink contains an aqueous vehicle, a dispersed pigment colorant, a dispersed polyurethane polymer, and a dispersed olefin ionic copolymer. The ink exhibits improved short-term durability.

Pigmented inkjet ink comprising dispersed polyurethane and olefin ionic copolymer

Aqueous pigment dispersions having monomers in the polymeric dispersant capable of interacting with cellulose are described. These monomers include the ones having a structure of Formula (I): 

Aqueous pigment dispersions with components to interact with cellulose

The present invention relates to urea-terminated polyurethanes dispersants based on diols and polyether diols, aqueous dispersions of such polyurethanes, the manufacture of the urea terminated polyurethane dispersions and inks containing pigments and/or disperse dyes dispersed with these urea terminated polyurethane dispersants. The urea termination can have nonionic hydrophilic substituents.

Urea-terminated polyurethane dispersants

Aqueous pigment dispersions based on polyurethane dispersants having components capable of interacting with cellulose are described. These components include a heterocycle pendent and or terminal to the polymer chain. The heterocycle is selected based on its Hansen solubility parameters.

Aqueous pigment dispersions based on polyurethane dispersants having components to interact with cellulose

Aqueous pigment dispersions having components in the dispersant capable of interacting with cellulose are described. These components include a heterocycle substituted to the oxygen atom of an acrylate ester. The heterocycle is selected based on its Hansen solubility parameters.

The present disclosure provides an aqueous dispersion containing a colorant and a polyurethane dispersant, wherein the polyurethane dispersant is a polymer having a cross-linkable moiety, wherein the cross-linkable moiety is cross-linked, with a cross-linking agent.

Cross-linked pigment dispersion based on polyurethane dispersants

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.

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

Disclosed are aqueous inkjet inks containing a polyurethane 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 polyurethane 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.

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

A process for preparing an aqueous pigment dispersion is provided in which a pigment, a coating agent, a grinding agent and a vehicle are subjected to grinding, followed by removal of the grinding agent and the vehicle to form a press cake, and dispersing the press cake to form a pigment dispersion. Also disclosed is an ink-jet ink containing an aqueous vehicle and the aqueous pigment dispersion thus made.

Method of preparing aqueous pigment dispersions

An ink for inkjet is provided for printing, comprising a self-dispersed pigment colorant and certain hydroxyl terminated polyurethanes derived from polyether diols which enhances fastness of the print towards highlighter and finger smudge without compromising jetting performance and storage stability of the ink.

Inkjet ink with self-dispersed pigments and hydroxyl terminated polyurethane ink additives

The invention provides an ink for inkjet printing, comprising colorant and certain polyurethane ink additives which is derived from alkoxy aromatic diol derived from alkoxy aromatic diols which enhances fastness of the print towards highlighter and finger smudge without compromising jetting performance and storage stability of the ink. The inks may be jetted from both thermal and piezo ink jet systems.

Inkjet ink with polyurethane additive derived from alkoxy aromatic diols inks

The present disclosure provides a ink-jet ink, having a pH greater than 7, comprising a first aqueous vehicle, a colorant, more typically a carbon black pigment, and an amphoteric polymeric dispersant, wherein the amphoteric polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment consisting essentially of an amine monomer; and the B block is a segment comprising an acidic monomer and at least one hydrophobic monomer; wherein the dispersant is neutralized, and the B block is free of an amine monomer. The disclosure further pertains to an ink set comprising this ink jet ink and at least a second ink which contains a reactive species with appropriate cationic agent, salt, or pH modifying agent capable of destabilizing the colorant containing dispersion of the first ink. Still further, the disclosure pertains to a method of printing wherein the first ink and second ink of the ink set are printed in an adjacent relationship, thereby minimizing penetration, feathering and/or bleed of the colorant and improving print quality.

Amphoteric dispersants and their use in inkjet inks

The disclosure provides an aqueous dispersion and ink jet inks comprising a colorant and an amphoteric polyurethane dispersant, wherein the amphoteric polyurethane dispersant comprises a reaction product of at least one basic amine urethane monomer, at least one acidic urethane monomer, and at least one urethane monomer comprising two or more isocyanates having improved bleed control, and optical density/chroma.

Amphoteric polyurethane dispersants and their use in inkjet inks

The present disclosure provides an aqueous dispersion comprising a solid particle and a polymeric dispersant, wherein the polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment having a block size of about 5 to about 18 units, and comprises at least 50% by weight of a monomer having the following structure: CH&#x2550;CRC(O)O(CHRCHO)nR; wherein R and Rare H, or methyl; Ris alkyl of 1-4 carbon atoms or phenyl; and n is about 1 about 20; and the B block is a segment comprising an ionic monomer and at least one hydrophobic monomer; and wherein the dispersant comprises a crosslinkable moiety; wherein the crosslinkable moiety is crosslinked with a crosslinking agent selected from the group consisting of epoxide, carbodiimide, oxazoline, isocyanate, and silane; and wherein the aqueous dispersion has a pH of at least about 8.0. These dispersions when used in aqueous ink jet inks provide images with the requisite optical density and chroma needed for emerging ink jet applications.

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Hockessin, DE, United States of America

C Chad Roberts