PAPER IMPREGNATION Russian patent published in 2001 - IPC

FIELD: papermaking. SUBSTANCE: invention provides aqueous dispersion of sizing agent containing sizing agent with chemical activity to cellulose and dispersing composition containing low-molecular cationic organic compound with molecular weight below 10000 and anionic stabilizer, in particular anionic polyelectrolyte. Acceptable anionic stabilizers include (i) anionic compounds functioning as stabilizers themselves and/or showing stabilizing effect in combination with cationic compounds and (ii) anionic compounds functioning as dispersants during preparation of sizing dispersions. Anionic compound is advantageously water-soluble or water-dispersible and can be either organic or inorganic, either naturally occurring or synthetic. EFFECT: increased stability and reduced viscosity of sizing dispersion resulting in improved quality of sizing. 23 cl, 7 tbl, 9 ex