| abstract |
a) dispose d'une viscosité spécifique comprise entre 0,25 et 2 (mesurée sous la forme d'un sel de sodium), b) est salifié à un taux d'au moins 0,60 par au moins un agent de salification disposant d'une fonction polyvalente. Complex pigment compositions for coating paper comprising an aqueous phase, at least one pigment of mineral origin, a binding agent, optionally various usual additives and a dispersing agent consisting of water-soluble carboxylic polymers in a salified form obtained by known processes which are characterized in that the dispersing agent: a) has a specific viscosity of between 0.25 and 2 (measured in the form of a sodium salt), b) is salified at a rate of at least 0.60 by at least one salifying agent having a versatile function. n n n These complex pigment compositions which offer very low viscosities can simultaneously contain pigments as diverse as kaolin, titanium dioxide, calcium carbonate, while eliminating the usual increases in viscosity and the risks of solidification. |