IMPROVED TITANIUM DIOXIDE PIGMENTS

摘要

Titanium dioxide pigments characterized by improved gloss developing and dispersibility properties in surface coating vehicles and reduced tendencies to adsorb moisture. Said titanium dioxide pigments comprise pigmentary titanium dioxide particles having deposited thereon a treating agent comprising at least one amine salt of a polyprotic acid having pKa1 value greater than about 2.5 and a water solubility at 20 DEG C of at least 2.0 weight percent and an alkanolamine having a pKb1 greater than about 4.4.