摘要:
Titanium dioxide pigments having improved gloss and durability are disclosed. These pigments are prepared by continuous processes, where pH, temperature, and addition times of hydrous silica and alumina coatings are carefully controlled.
摘要:
An improved composition capable of forming a translucent coating on a construction material surface comprising at least: a) photocatalytic titanium dioxide particles having at least a de-NO x activity; b) a silicon based-material in which said particles are dispersed, wherein said silicon based material includes at least one polysiloxane; and c) particles having a de-HNO 3 activity selected from calcium carbonate, magnesium carbonate and mixtures thereof.
摘要:
A method of preparing stable, transparent photocatalytic titanium dioxide sols is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sols comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.
摘要:
The present invention provides methods of preparing a titanium dioxide pigment having improved gloss properties which involves heating an aqueous slurry of base titanium dioxide pigment to a temperature below about 75 DEG C, coating the base titanium dioxide pigment with a silica compound at a temperature below about 75 DEG C to form a silica coated titanium dioxide pigment; and coating the silica coated titanium dioxide pigment with an alumina compound at a temperature below about 75 DEG C to form the titanium dioxide pigment having improved gloss.