Ciba Specialty Chemicals Corporation

Basf Se Corporation

Thomas Healy

Athanassios Tzikas

Philippe Bugnon

Iain Frank Fraser

Hubert Jean Luc Christnacher

Kenneth Grant Dykes

Stephen John Coughlin

David Keirs

Lynda Cannon

Tracy Murray

Stuart Cook Niven

Ian Andrew Lambie

David Cameron

Richard Ernest Mathers

Cairan Thomas Ewins

The invention pertains to a novel, simpler dry-milling method for comminuting crude pigments (especially crude phthalocyanines) for use in publication gravure and packaging inks, wherein the crude pigment is dry-milled at relatively low temperature in combination with a resin and a pigment derivative, preferably further together with an extender and optionally an antioxidant. The invention also pertains to the thus obtained, new compositions, which are extraordinarily easily dispersible in aromatic solvents, and their use for the preparation of publication gravure or packaging inks or ink concentrates. Pigment dispersions obtained from the preferred compositions are also claimed.

Process for preparation of a novel pigmented composition for use in gravure inks

The invention pertains to a novel, simpler dry-milling method for comminuting crude pigments (especially crude phthalocyanines) for use in offset inks, wherein a high amount of resin is used, at least part of which is a low molecular phenol-modified rosin, an esterified rosin or a hydrocarbon resin of similar properties, preferably together with an antioxidant, and dry-milling is performed at relatively low temperature. The invention also pertains to the thus obtained, new compositions, which are extraordinarily easily dispersible in hydrocarbon solvents, and their use for the preparation of inks or ink concentrates. Pigment dispersions obtained from the preferred compositions are also claimed.

Process for the preparation of a novel pigmented composition for use in offset inks

The invention pertains to a highly concentrated pigment comprising Also claimed are a process for its manufacture, comprising dry-milling, blending and kneading the components, and the use of the pigment concentrates for the preparation of a masterbatch, ink, coating, plastic material, toner or colour filter.

Highly concentrated flowable pigment composition and process for its manufacture

The invention provides a composition comprising particles of an optionally halogenated phthalocynine (a); from 0.5 to 10% weight, preferably from 2 to 8% by weight, based on the optionally halogenated phthalocyanine (a), or a vinylic or acrylic polymer (b); and from 1 to 15% by weight, preferably from 3 to 10% by weight, based on the optionally halogenated phthalocyanine (a), of an optionally halogenated phthalocyanine (c) which is outside the particles of the optionally halogenated phthalocyanine (a) and is substituted by a group comprising at least 1 hetero atom selected from the group consisting of N, O, S and P and at least 3 carbon atoms. The instant compositions comprising three essential components are surprisingly warpfree in substrate such as partially crystalline plastics, especially those processed by injection moulding. Geometrically identical parts of different colours are obtained.

Warp-free pigment compositions comprising phthalocyanine pigments

Pigment composition comprising an organic pigment and a combination of at least two normally water-soluble coloured compounds (dyes) of opposing charge, i.e. of at least one anionic and one cationic dye are provided. The compositions impart improved rheology on non-aqueous pigment based printing inks and paints.

Compositions and methods for imparting improved rheology on pigment based inks and paints

Production process

Pigment compositions containing substituted amido phthalocyanine derivatives

A pigment composition comprising pigment and an amido phthalocyanine compound having the general formula I:

Pigment compositions containing substituted amido phthalocyanine

A process for the preparation of substituted amido phthalocyanines having the general formula I:

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Paisley, United Kingdom

Thomas Healy