PIGMENT COMPOSITION IN FORM OF AQUEOUS SUSPENSION Russian patent published in 2010 - IPC C01B33/12 C09C1/40 D21H19/40 D21H19/56 D21H19/64 C09D1/00 C09D17/00 

FIELD: printing industry.

SUBSTANCE: pigment composition in the form of aqueous suspension includes pigment particles of synthetic amorphous silicon dioxide or aluminium silicate, at least one water-soluble aluminium salt and at least one cationic polymer having molecular weight from approximately 2000 to approximately 1000000, and density of charge is from around 0.2 to around 12 meq/g. Particles of synthetic amorphous silicon dioxide or aluminium silicate are selected from the group that consists of deposited silicon dioxide, silicon dioxide in the form of gel, colloidal primary particles of silicon dioxide, aluminium silicate or their mixture, porous aggregates formed by aggregation of primary colloidal particles of silicon dioxide, aluminium silicate or their mixture in aqueous sol or mixture of one or several above mentioned types of particles. Amount of cationic polymer makes from approximately 0.1 to 15 wt % per amount of dry pigment particles. Method for production of pigment composition includes mixing particles of synthetic amorphous silicon dioxide or aluminium silicate, water soluble aluminium salt and cationic polymer without gel formation or deposition. Composition is used to apply coating onto paper or cardboard web.

EFFECT: pigment composition is easily applied onto surface of paper or cardboard for jet printing.

20 cl, 4 ex