| MadSci Network: Chemistry |
|
what are the solvents used in paint industries for titanium dioxide?
Paint industries use titanium dioxide as the UV absorbent or UV inhibitor. since TiO2(Rutile or Anatase) is in solid form and interested in knowing the solvents that are used to dissolve them. Please clear my doubts. You misunderstand the way that titanium dioxide is included in paint. Titanium dioxide, or rutile, is a white pigment--finely divided--that is suspended in a viscous medium to make paints. The medium may be a solution of a polymeric resin in an organic solvent, or a latex (a suspension, like milk, of a polymeric resin in water); but in both cases the rutile is not dissolved but suspended in the medium. Paints may include other pigments as well, but if you've bought any quantity of paint at a store (I did recently, because I was repainting my downstairs bathroom and study) you know that it begins as white paint, to which colorants are added. This white paint contains a suspension of rutile, which acts both as a pigment and as a UV inhibitor.
UV inhibitors help to prevent the resin, which is the organic coating left when the paint is dry, from being broken down by ultraviolet light. Clear laquers and varnishes cannot include TiO2 because such inclusion makes the coating opaque.
|
Try the links in the MadSci Library for more information on Chemistry.