Лако-красочные материалы — производство

Titanium dioxide is highly stable and is regarded as completely nontoxic. Investiga­tions on animals, which have been fed TiO2 over a long period give no indication of titanium uptake [2.68]. Absorption of finely divided TiO2 pigments in the lungs does not have any TiO2-related specific carcinogenic effect [2.72]. Generally, inhalation of smaller particles into the […]

Nanostructured TiO2 particles (particle size 5-50 nm) are used as sunscreens in the cosmetic industry. Nanosized TiO2 is an effective absorber of UV-B (280-320 nm) and UV-A radiation (320-400 nm). Because ofits small particle size, itappears trans­parent [2.70]. Intensive research work is in progress worldwide aimed at utilizing the photoactivity of TiO2. Titanium dioxide catalyzes […]

The starting material is an anatase pigment or a TiO2 hydrolyzate, which is calcined with oxides of transition metals to form chromium rutile or nickel rutile pigments (see Section 3.1.3.). 2.1.8.4

Titania is an active catalyst for various reactions, inorganic and organic, thermal and photochemical. It may be self-supported, or it may be supported on other material. For catalysis it is usually doped with other elements in order to enhance the desired effect The most important catalytic application for TiO2 is the removal of nitrogen oxides […]

Titanates, for example, barium, strontium, calcium, and lead titanate, prepared from finely divided, high-purity TiO2 substrates, are used in capacitors, PTC-resistors, and piezoelectric materials. The specifications ofthe TiO2 starting materials with respect to purity, reactivity, and sintering properties are increasingly challenging. The global market is several thousand tons of TiO2 per year. Strong annual growth […]

A lot of industrial products require TiO2 starting materials with well-defined prop­erties for specific applications. Some of the most important of these grades of tita­nium dioxide are those with a high specific surface area, a small particle size, and very high reactivity. Specific requirements often exist regarding purity and property consistency. The most important applications […]

These include the enamel and ceramic industries, the manufacture ofwhite cement, and the coloring of rubber and linoleum. Titanium dioxide pigments are also used as UV absorbers in sunscreen products, soaps, cosmetic powders, creams, toothpaste, cigar wrappers, and in the food and cosmetics industry. Their most important properties are their lack of toxicity, com­patibility with […]

Titanium dioxide pigments give a solid appearance to synthetic fibers, eliminating the greasy appearance caused by their translucent properties. Anatase pigments are used for this because their abrasive effect on the spinning operation is about one quarter that of the rutile pigments. The poor lightfastness of anatase pigments in polyamide fibers can be improved by […]

Modern printing processes operate at coating thicknesses of < 10 pm, and therefore require the finest possible TiO2 pigments. These very low film thicknesses are only possible with TiO2 pigments that have a lightening (reducing) power seven times that of lithopone. Because of its neutral mass-tone, TiO2 is especially suitable for lightening (reducing) colored pigments. […]

These account for the largest volume ofTiO2 production. The presence of the pigment enables the protective potential of the coating material to be fully exploited. As a result of continuing developments in TiO2 pigments, coatings only a few micrometers thick fully cover the substrate. Commercially available pigments permit paint manufacture with simple dispersion equipment, such […]