US Patent 7482054 - TiO2/nanoparticle paint mixture

http://www.freepatentsonline.com/7482054.html

This patent from Behr Process Corporation teaches improving the effectiveness of titanium dioxide white paste using ZnO nanoparticles to improve the distribution of the particles which is taught to improve the tint strength. Claim 1 reads:

1. A process for preparing a titanium dioxide dispersion, comprising:

pretreating a plurality of titanium dioxide particles with a metal oxide;

dispersing a plurality of titanium dioxide particles in a first dispersion medium;

preparing a nanoparticle pigment;

mixing the nanoparticle pigment and the first dispersion medium containing the titanium dioxide; and

interacting the first dispersion medium, the nanoparticle pigment and the titanium dioxide to form an intervening dispersion of a plurality of nanoparticles around the titanium dioxide particles.