E.i. Dupont De Nemours and Company

The Chemours Company Tt, LLC

Daniel C Kraiter

Michael Patrick Diebold

Xiaoqing Li

Jose Esteban Valentini

Timothy Allan Bell

Josef Huybrechts

Eric Rusnak

Agingu Shih

Beatriz E Rodriguez-Douglas

Roger Vervloet

The disclosure provides a coating composition comprising a treated inorganic core particle, having improved dispersability, prepared by a process comprising: heating a slurry comprising porous silica treated inorganic core particle and water at a temperature of at least about 90&#xb0; C., more typically about 93 to about 97&#xb0; C., still more typically about 95 to about 97&#xb0; C.; and adding a soluble alumina source to the slurry while maintaining the pH at about 8.0 to 9.5 to form an alumina treatment on the porous silica treated inorganic core particle; wherein the treated inorganic core particle does not comprise dense silica or alumina treatments, and has silica present in the amount of about 7% to about 14% and alumina present in the amount of about 4.0% to about 8.0%; and wherein the particle to particle surface treatments are substantially homogeneous.

Treated inorganic pigments having improved dispersability and use thereof in coating compositions

Inkjet inks are provided, relating in particular to smear resistant inkjet inks, and even more particularly to smear resistant pigmented aqueous inkjet inks comprising polyurethane dispersions and self-dispersing pigments. The polyurethane dispersions have a glass transition temperature Tg greater than &#x2212;30 &#xb0; C. to less than about 35 &#xb0; C. and have at least one of the following thermal properties: loss modulus E&#x2033; of 1.7 to 5&#xd7;10pascals, and/or a peak tan delta is 0.23 to 0.65, where the glass transition temperature, peak tan delta and the loss modulus are measured by dynamic mechanical analysis on a film prepared from the polyurethane dispersion.

Smear resistant inkjet inks

The disclosure provides a paper slurry comprising a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.

Treated inorganic pigments having improved bulk flow and their use in paper slurries

Pigment dispersions containing ABC-block polymer dispersant

Acrylic AB block copolymers prepared by group transfer polymerization that are useful as pigment dispersants, characterized by mononuclear or dinuclear heterocyclic groups bonded to the highly polar anchoring A segment of the block copolymer backbone to facilitate attachment on a pigment surface and improve dispersant efficiency in solvent-borne paint systems.

Acrylic block copolymer pigment dispersants containing heterocyclic groups

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Wilmington, DE, United States of America

Daniel C Kraiter