Sun Chemical Corporation

Ciba-geigy Corporation

University of Cincinnati

George H Robertson

Edward H Sung

Russell J Schwartz

Stanislav G Vilner

George McLaren

Kevin A Arthur

Robert L Rooney

Robert B Todd

Humberto A Velasquez

Jason C Heikenfeld

Seiji Funakura

Tatiana Romanova

Steven L Johnson

Bo Sun

Terrence R Chamberlain

April Milarcik

Mark Ortalano

Kathleen Marie Kozak

Veronica L Chambers

Alistair B Boyd

James Z Dong

Chris M Arizo

Ronald R Forbes

George Mclaren

Electrofluidic devices, visual displays formed from the electrofluidic devices, and methods for making and operating such electrofluidic devices Each electrofluidic device has a fluid vessel with first and second regions that contain an electrically conductive polar fluid and a non-polar fluid The polar and/or the non-polar fluids are externally visible external through a viewable area of the second region A voltage source is electrically connected to a capacitor having a hydrophobic surface that contacts the polar fluid and provides a first principal radius of curvature of the polar fluid that is convex and smaller than a second principal radius of curvature of the polar fluid in the first region The voltage source applies an electromechanical force to the polar fluid, thereby transferring the polar fluid from the first region to the second region and causing a spectral property of light transferred through the viewable area to change.

Electrofluidic devices, visual displays, and methods for making and operating such electrofluidic devices

A process for continuous flush of a pigment press cake involves applying a dispersant to the press cake to produce a fluidized press cake, continuously feeding the fluidized press cake into a twin screw extruder and mixing it with a neutralizing agent in the extruder, mixing the neutralized press cake with a liquid organic medium in the extruder to produce an organic flush phase and a water phase, and removing at least part of the water phase from the extruder through one or more parts of the extruder.

Continuous process for preparing pigment flush

The present invention provides an electrostatic charge developing toner which uses a &#x3b2;-type copper phthalocyanine pigment that has a BET specific surface area of 90 m/g or greater as determined by the nitrogen adsorption method.

Electrostatic charge developing toner

Phthalocyanine blue pigments and pigment dispersions for water-borne inks and coatings are described. The pigments are produced by dry milling phthalocyanine blue and a polymeric dispersant, optionally with inorganic fillers and other additives, to obtain a material with improved coloristic, rheological, and stability properties. The resulting activated crude is then processed directly into water-based pigment dispersion with additives and/or surfactants to facilitate conversion to pigmentary form while maintaining the desirable green and clean shade.

Copper phthalocyanine blue pigment composition and water borne dispersion thereof

A process for the manufacture of a transparent Pigment Yellow 155 or transparent Pigment Yellow 180 is disclosed, said process includes grinding particles of said pigment in the presence of a grinding agent until said particles achieve a surface area of at least about 40 m/g.

Preparation of yellow pigments

A process for conditioning azo pigment with surfactants of ethoxylate alkyl phenols in the presence of a strong alkali in the aqueous condition.

Process for conditioning azo pigments

A process for by oxidizing a quinacridone in a liquid medium with a non-metal oxidant producing a quinacridonequinone.

Preparation of quinacridonequinones and substituted derivatives of same

A pigment's etheramine sulfonic acid salt is described. Also described is a method for enhancing the performance of a pigment composition containing an organic pigment, comprising enhancing the dispersion of said pigment by adding to 100 parts of said pigment about 1 to 40 parts of a pigment's etheramine sulfonic acid salt.

Treatment of high performance pigments

A process for producing beta-phase quinacridone by (a) reacting 2,5-dianilino-terephthalic acid with polyphosphoric acid in the presence of 2,5-dianisidino-terephthalic acid at a reaction temperature of at least 85&deg; C.; (b) diluting the reaction mixture with water; (c) drowning the diluted mixture in a water-miscible alkanol; (d) heating the slurry at a temperature of from 100 to 130&deg; C. at a pressure of 20 to 50 psi; and (e) recovering the beta-phase quinacridone.

Process for the preparation of beta-phase quinacridone

An etheramine pigment dispersing salt for enhancing the dispersion performance of an organic pigment composition adding to 100 parts by weight of pigment about 1 to 40 parts by weight of an etheramine pigment dispersing salt.

Treatment of high performance pigments with etheramine dispersing salts

A method of acid swelling crude perylene pigment by treating the crude with about 2 to 10 parts by weight of toluene sulfonic acid at an elevated pressure and at temperatures ranging from 40 to 140&deg; C.

Toluene sulfonic acid swelling of perylene pigments

An improved process for producing a substantially pure gamma phase a quinacridone pigment or pigment derivative involving preparing an aqueous slurry of a crude quinacridone in the presence of caustic alkali and a non-polar, water immiscible solvent; and heating said slurry at a temperature above about 120&deg; C.

Process for preparing a substantially pure gamma phase quinacridone pigment of large particle size

Crude phthalocyanine is converted from its crude state to its pigmentary form by (1) milling it with a phthalimidomethyl phthalocyanine derivative or a sulfonated phthalimidomethyl phthalocyanine derivative in the absence of any milling or grinding aid or by (2) grinding the crude phthalocyanine in the absence of any milling or grinding aid and then blending the ground material with a phthalimidomethyl phthalocyanine derivative or a sulfonated phthalimidomethyl phthalocyanine derivative. Without any additional conditioning or purification the pigment product is suitable for use in printing inks, paints, coating compositions, and the like.

Conditioning crude phthalocyanine pigments

The properties of azo arylamide pigments are improved by treating them with dimer acid-based amines.

Process for treating azo pigments

A process for producing a pigment or dyestuff composition in the form of dustless readily-dispersible granules which comprises contacting, with agitation, an aqueous dispersion of a pigment, and an aniline which is liquid at temperature below 100.degree. C., insoluble in water at pH values above 7, and soluble in water at pH values below 7, the pH value being first above 7, maintaining the temperature above the melting point of the aniline and reducing the pH to below 7 to render the aniline compound soluble in water, and recovering the resulting granules in a solvent free condition.

Growing community of inventors

Loveland, OH, United States of America

George H Robertson