| 摘要 |
<p>In the homogeneous coating of a titanium dioxide pigment with an organic polymer in which an aqueous solution of a polymer containing carboxyl groups is added to a dispersion of titanium dioxide in water, the polymer is applied to the pigment, the coated pigment is separated off from the aqueous medium, washed, dried and, optionally ground, the improvement which comprises employing as the polymer a polymer of the formula <IMAGE> in which R1 each independently is hydrogen or methyl, R2 is hydrogen, or alkyl or cycloalkyl containing from 1 to 8 carbon atoms, M is sodium or potassium, R3 is hydrogen, alkyl or cycloalkyl containing from 1 to 12 carbon atoms, or hydroxyalkyl containing from 2 to 6 carbon atoms, m=0.2 to 1.</p> |
