Titanium dioxide binders pigmented with

Titanium dioxide pigments are also used as UV absorbers in sunscreen products, soaps, cosmetic powders, creams, toothpaste, cigar wrappers, and in the cosmetics industry. Their most important properties are their lack of toxicity, compatibility with skin and mucous membranes, and good dispersibility in organic and inorganic solutions and binders. 

Special effect pigments suitable for outdoor applications must meet the highest standards for color fastness and weather resistance. These pigments are coated additionally with thin layers of transparent and colorless oxidic compounds. These layers increase the light resistance by reducing the photoactivity of the titanium dioxide surface. In addition, the interaction between pigment and binder is optimized. 

Is a highly efficient titanium dioxide pigment white with binders present. This white is useful in roller printing and rotary screens to provide economical prints. 

Nearly all paints and adhesives contain various fillers (Bikerman, 1968 Martens, 1968, Chapters 3 and 4 Patrick, 1973), ranging from titanium dioxide through ferric salts to clay. It is common in these industries to refer to the filler as the pigment and the polymer as the binder, which already brings to the fore the problems associated with bonding the filler to the polymer. The fillers not only serve to extend the polymer, but also to raise its modulus and toughen the final product. 

The use of water in place of organic solvents as a paint thinner has obvious attractions. The first important commercial product of this type was the oil-bound water paint, the vehicle being an emulsion of oil or varnish in an aqueous solution of gelatine. The preferred white pigment was lithopone (zinc sulphide/ barium sulphate), and a high ratio of pigment to binder was used. This product was eventually replaced by the emulsion paint (known as latex paint in USA and dispersion paint on the continent of Europe). It used a synthetic vinyl polymer as a binder, mainly a co-polymer of vinyl acetate with either vinyl versatate or butyl acrylate, with titanium dioxide as the white pigment. Attempts to use an alkyd emulsion based on oil as the vehicle were commercially unsuccessful. The droplet size of the dispersion at emulsion is normally about 0.2-1 //m. 

Figure 12 Enlarged images of the intersection of two perpendicular lines produced by conventional (A) and ER (B) toners. The ER toner is the composite particles (toner particles) consisting of color pigments (phthalocyanine blue and brilliant carmine 6B), titanium dioxide, and binder resin (copolymer of ethylene and vinyl acetate), and dispersed in isopar L (from Exxon Chemicals). Reproduced with permission from Y. Otsubo, and Y. Suda, J. Colloid Inter . Sci., 253 (2002)224...

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