PRODUCT FOR USE IN PAPERMAKING AND PREPARATION THEREOF

摘要

A paper sizing composition, comprising at least one first sizing component dispersed in water, the said sizing component being prepared of a reaction product of a maleic anhydride and a fatty acid component, and an aluminium component. The fatty acid component comprises an alkyl ester of one or more fatty acids selected from a vegetable oil based fatty acid mixture. The particle size of the particles in said first sizing component has been reduced so that in the dispersion at least 50 % of the particles are < 2,5 µm, at least 75 % of the particles are < 4 µm and at least 90 % of the particles are < 5 µm, preferably so that at least 50 % of the particles are < 2 µm, at least 75 % of the particles are < 3 µm and at least 90 % of the particles are < 4 µm.