Method for producing novel photochemically-active metal oxide-containing aqueous
compositions such as TiO2 compositions coated or sprayed and dried under
ambient conditions to form novel photochemically-active, colorless coatings having
strong wetability and adhesion to clear substrates such as window glass. Preferably
the present compositions include a suitable wetting agent or combination of agents
to improve the wetability of the Titanium peroxide-containing amorphous film, allowing
thinner films to be readily applied. Also the inclusion of an acrylic aliphatic
urethane polymer can replace wholly or partially the titanium peroxide sol and
provide additional film forming and wetability properties. The acrylic urethane
polymer reduces or eliminates the amount of titanyl peroxide that is required and
thereby reduces or eliminates the yellow color.
