Basf Se Corporation

Ciba Specialty Chemicals Corporation

Charles Hunger

Michael Lennartz

Adolf Käser

Asko Karppi

Heinz Schneider

Ray Davenport

Ian William Knowles

Terry Lloyd

Barry McLow

Asko Olavi Karppi

The invention relates to a composition for surface coloration of paper web comprising a) from 0.1 to 30% by weight, based on the total weight of the composition, of a coloring pigment, b) from 0.1 to 20% by weight, based on the total weight of the composition of a starch/latex copolymer, characterized in that, in addition to starch, the monomeric components that are copolymerized comprise i) styrene or a substituted styrene, ii) an acrylate and/or methacrylate and, optionally, iii) one or more further ethylenically unsaturated monomers, c) from 0 to 20% by weight, based on the total weight of the composition, of starch or a starch derivative, d) from 0 to 10% by weight, based on the total weight of the composition of one or more auxiliaries and e) water to complete to 100% by weight, based on the total weight of the composition.

Composition for surface colouration of paper

The invention relates to a composition for controlling the bleed fastness of organic coloring pigments in paper coatings comprising a) 1 to 30% by weight, based on the total weight of the composition, of an organic coloring pigment, b) 1 to 20% by weight, based on the total weight of the composition, of one or more binders, c) 0 to 20% by weight, based on the total weight of the composition, of starch, d) 0 to 10% by weight, based on the total weight of the composition, of an anionic direct dye, e) 0 to 10% by weight, based on the total weight of the composition one or more auxiliaries and f) water to 100%, a method of application and use of the composition.

Paper coating compositions

The invention relates to a process for the surface coloration of paper characterized in that, in a first step, the paper surface is treated with a water soluble dye and, subsequently, in a second step, the paper surface is treated with a fixing agent.

Process for surface colouration of paper

A liquid preparation of a paper dye comprising a) 15 to 50% by weight of the dye of the formula CuPc[SONH(CH)N(CH)][SOH](1), in which CuPc represents copper phthalocyanine, or the alkali metal salt of (1), b) 5 to 15% by weight of &#x2208;-caprolactam, c) 1 to 8% by weight of formic acid, d) 1 to 7% by weight of benzyl alcohol, e) 0 to 3% by weight of a lower aliphatic organic acid, f) 0 to 5% by weight of an inorganic salt and g) water, to complete to 100% by weight, a process for the production of said preparation and the use thereof for dyeing, in particular dyeing of paper.

Liquid preparation of a copper phthalocyanine dye

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Ettingen, Switzerland

Charles Hunger