Cabot Corporation

Tianqi Liu

Jinqi Xu

Paul S Palumbo

Heather E Clarke

Lang H Nguyen

Angelica M Sanchez Garcia

Jodi A Bates

Zhangliang Gui

Kavita K Pai

Melissa J Monello

Takashi Umehara

Andrea Lebed

Alexander I Shaknovich

Steven Jacobs

Robert J Nick

Barbara E Brys

Andrew P Dikan

Robert J Anderson

An aqueous hydrophobic silica dispersion includes a hydrophilic particulate silica, a hydrophobic particulate silica having a methanol number of at least 60, and a dispersant having at least one cationic or cationizable group and an HLB ratio of 2 to 20.

Aqueous hydrophobic silica dispersions

Disclosed herein are inkjet ink compositions comprising: at least one pigment having attached at least one organic group having a calcium index value greater than a calcium index value of 1,2,3-benzene tricarboxylic acid; at least one acrylic polymer having an acid number of at least 150 KOH/g and a weight average molecular weight ranging from 1,000 to 15,000, wherein the at least one acrylic polymer is at least partially neutralized with a base having the following structure: wherein: A is a C-Calkyl, Ris selected from H, C-Calkyl, an amine having the formula —NRR, and a guanidine residue having the formula —N(R)—C(═NH)—N(R)(R), wherein Rto Rare independently selected from H and C-Calkyl, and Ris selected from H, C-Calkyl, and an acid group. The inkjet ink composition further comprises an aqueous liquid medium.

Acrylic polymers for inkjet ink applications

Disclosed herein are inkjet ink compositions comprising: at least one pigment and at least one polyurethane comprising: at least one polypropylene glycol, and at least one diisocyanate. The at least one polyurethane contains at least 70 wt % polypropylene glycol relative to the at least one polyurethane and has a weight average molecular weight (M) of no more than 80,000.

Inkjet ink compositions

Disclosed herein are polymers, which can be incorporated in pigment dispersions and inkjet ink compositions, comprising first monomers selected from ethylenically unsaturated hydrophobic monomers, and second monomers selected from maleic anhydride, maleic acid, and salts, esters, imides, and amides thereof. The polymers can have a portion of the second monomers functionalized with at least one organic group having a calcium index value greater than or equal to a calcium index value of phenylphosphonic acid. Additionally and/or alternatively, the at least one polymer can be crosslinked via the second monomers. Dispersions and inkjet ink compositions comprising such polymers can also further comprise at least one pigment and a liquid vehicle. Also disclosed are methods of making such polymers.

Polymers for inkjet ink compositions

Disclosed herein inkjet ink compositions comprising: (a) a carbon black having the following properties: OAN&#x2265;170 mL/100 g; and STSA ranging from 160 to 220 m/g; (b) at least one polymeric dispersant selected from polyoxyethylene/polyoxypropylene block copolymers, styrene-acrylic resins, styrene-methacrylic resins, styrene-maleic acid copolymers, and styrene-maleic anhydride copolymers; (c) at least one surfactant selected from ethoxylated siloxanes, succinic acid esters, and succinic acid salts; and (d) at least one polyurethane.

Disclosed herein are aqueous inkjet ink compositions and coating compositions comprising: at least one pigment; at least one polymer; and at least one water-soluble compound having a hydroxyl number of at least 40, wherein the at least one water-soluble compound is selected from ethoxylated C-Cpolyols, C-Cpolyols having three or more hydroxyl groups, and polyether polyols, and wherein the at least one water-soluble compound is present in an amount ranging from 1% to by 60% weight, relative to the total weight of the composition, wherein the composition comprises a total amount of water-soluble organic components ranging from 25% to 60% by weight, relative to the total weight of the composition.

Aqueous inkjet ink compositions

Disclosed herein are aqueous dispersions comprising: at least one pigment present in an amount of at least 10% by weight relative to the total weight of the dispersion, the at least one pigment being selected from oxidized carbon blacks and modified carbon blacks having attached at least one organic group; and at least one organic solvent present in an amount of at least 10% by weight relative to the total weight of the dispersion, the at least one organic solvent having a Hansen hydrogen bonding parameter (&#x3b4;) ranging from 13 to 50 MPa, and a Hansen polarity parameter (&#x3b4;) ranging from 5 to 13 MPa, wherein the dispersion is substantially free of a surfactant. Also disclosed are methods of preparing aqueous dispersions and injet ink compositions prepared from the same.

Aqueous pigment dispersions

Disclosed herein are ink compositions comprising a self-dispersed pigment in a liquid vehicle. The liquid vehicle can comprise a solvent/water mixture in which the composition further comprises a surfactant system having limited solubility/compatibility with the liquid vehicle. Also disclosed are surfactant systems comprising at least a first and a second surfactant, where the first surfactant is selected from alkoxylated alkyne-containing alkylene diols and N-alkyl pyrrolidones, and wherein the first surfactant has a solubility of less than 0.5% in a 5% glycerol/water mixture, and where the a second surfactant is selected from acetylene alcohols comprising linear or branched C-Calkyls, and alkoxylated phosphate esters.

Ink compositions comprising surfactants having limited solubility

The present invention relates to a modified pigment comprising a pigment having attached at least one salt of a geminal bisphosphonic acid group or partial esters thereof, as well as to dispersions and inkjet ink compositions comprising such modified pigments. Preferably the salt comprises a quaternary ammonium counterion.

Growing community of inventors

Boxborough, MA, United States of America

Tianqi Liu