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Lithopone pigments

The zinc-sulfide-containing white pigment with the largest sales volume is litho-pone [1345-05-7], which is produced by coprecipitation and subsequent calcination of a mixture of zinc sulfide [1314-98-3], ZnS, Mr 97.43, and barium sulfate [7727-43-7], BaS04, Mr 233.40. For standards, see Table 1 (Lithopone pigments Specification ). Pure zinc sulfide is marketed as Sachtolith. [Pg.71]

Lithopone. Lithopone is a mixture of ZnS and BaS04. The pigmentary properties of the mixture are determined by zinc sulfide and therefore lithopone pigments are characterized by the amount of ZnS present in the mixture. The amount of ZnS in commercial lithopones varies from 15 to 60%. The most common is a 30% lithopone pigment, containing 28—30% of ZnS and 70—72% of BaS04. [Pg.10]

Other early observations of photochromic systems include ter Meer s potassium salt of dinitroethane (9) and Phipson s gate post painted with photochromic lithopone pigment (10). [Pg.276]

Titanium dioxide white pigment based on the rutile modification is mainly used for PP due to its high refractive index of 2.8. ZnS and ZnS/ BaS04-based lithopone pigments are also used due to their low hardness and abrasivity, e.g. in glass reinforced PP types. [Pg.592]

Zinc is also used extensively to galvanize other metals such as iron to prevent corrosion. Zinc oxide is a unique and very useful material for modern civilization. It is widely used in the manufacture of paints, rubber products, cosmetics, pharmaceuticals, floor coverings, plastics, printing inks, soap, storage batteries, textiles, electrical equipment, and other products. Lithopone, a mixture of zinc sulfide and barium sulfate, is an important pigment. [Pg.54]

Lithopone [8006-32-4] an important white pigment, is produced mainly in the former Soviet Union, the C2ech RepubHc, and the People s RepubHc of China. In China, the nation s output for Hthopone peaked in 1990 at about 233,000 t. In 1992 it was only 168,000 t. About one-third of the Hthopone produced in China was exported. Annual worldwide production can be estimated to be under 250,000 t as of this writing (ca 1995) (18) (see Barium... [Pg.7]

Production. Commercial production of Hthopone started in the first half of the nineteenth century, and continued to grow until the middle of the twentieth century when titanium dioxide started to dominate the white, inorganic pigment market. Lithopone is prepared by combining barium sulfide and 2inc sulfate solutions at 50—60°C ... [Pg.10]

Use. Lithopones are used in water-based paints because of their excellent alkaH resistance, in paper manufacturing as a filler and opacifying pigment, and in mbber and plastics as a whitener and reinforcing agent. [Pg.11]

C04-0121. Lithopone, a brilliant white pigment used in paints, paper, and white rubber products, is a mixture of two insoluble Ionic solids, ZnS and BaSOq. Suggest how 1.0 kg of lithopone could be prepared by a precipitation reaction. [Pg.272]

Lithopone, a commonly used pigment containing barium sulfate and zinc sulfide, is produced by the following reaction ... [Pg.365]

White pigments, some of rather variable composition, that have been used in the past include white lead (Cl Pigment White 1), refractive index 1.9 zinc oxide (Cl Pigment White 4), r.i. 1.9 lithopone (Cl Pigment White 5), r.i. 1.84 zinc sulphide (Cl Pigment White 7), r.i. 2.3 antimony oxide (Cl Pigment White 11), r.i. 2.2. All have been eclipsed by titanium dioxide (Cl Pigment White 6). [Pg.76]

Its compounds have many practical uses. For example, when the mineral barite is ground up into a fine powder, it can be used as a filler and brightener for writing and computer paper. It is also used (along with zinc sulfide) as a pigment, called lithopone, for white paint. Barium compounds are also used in the manufacture of plastics, rubber, resins, ceramics, rocket fuel, fireworks, insecticides, and fungicides and to refine vegetable oils. [Pg.80]

Cadmium hydroxide is the anode material of Ag—Cd and Ni—Cd rechargeable storage batteries (see Batteries, SECONDARY cells). Cadmium sulfide, selenide, and especially telluride find utility in solar cells (see Solarenergy). Cadmium sulfide, lithopone, and sulfoselenide are used as colorants (orange, yellow, red) for plastics, glass, glazes, rubber, and fireworks (see Colorants for ceramics Colorants forplastics Pigments). [Pg.392]

The barium sulfate in lithopone can be identified thermoanalytically by a reversible endothermic transformation at 1150°C. Both Sachtolith and lithopone are thermally stable up to ca. 550 °C in the presence of air. Due to their low Mohs hardness, they are less abrasive than other white pigments. Barium sulfate is practically inert toward acids, bases, and organic solvents. Zinc sulfide is stable in aqueous media between pH 4 and 10, and is largely inert toward organic media. In the presence of water and oxygen, it can be oxidatively decomposed by the action of UV radiation. [Pg.72]

The zinc salt and BaS solutions are mixed thoroughly under controlled conditions (vessel geometry, temperature, pH, salt concentration, and stirring speed, see (a) in Fig. 20). The precipitated raw lithopone does not possess pigment properties. It is filtered off (b2) and dried (c) ca. 2 cm lumps of the material are calcined in a rotary kiln (d) directly heated with natural gas at 650-700 °C. Crystal growth is controlled by adding 1-2 wt% NaCl, 2 wt % Na2S04 and traces of Mg2 + (ca. 2000 ppm), and K+ (ca. 100-200 ppm). The temperature profile and residence time in the kiln are controlled to obtain ZnS with an optimum particle size of ca. 300 nm. [Pg.73]

Zinc Sulfide, Whereas zinc sulfide is mainly important as a component of the composite white pigment lithopone, it also has a limited use as a single pigment. Under the commercial name Sachtolith, pure ZnS is produced by Sachtleben Chemie in Germany. [Pg.10]


See other pages where Lithopone pigments is mentioned: [Pg.4]    [Pg.4]    [Pg.59]    [Pg.59]    [Pg.144]    [Pg.3371]    [Pg.4757]    [Pg.5532]    [Pg.71]    [Pg.2529]    [Pg.4]    [Pg.4]    [Pg.59]    [Pg.59]    [Pg.144]    [Pg.3371]    [Pg.4757]    [Pg.5532]    [Pg.71]    [Pg.2529]    [Pg.242]    [Pg.419]    [Pg.445]    [Pg.126]    [Pg.1064]    [Pg.1209]    [Pg.125]    [Pg.445]    [Pg.1021]    [Pg.27]    [Pg.419]    [Pg.445]    [Pg.396]    [Pg.9]    [Pg.43]    [Pg.68]    [Pg.76]    [Pg.4]   
See also in sourсe #XX -- [ Pg.559 ]




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