Lithopone

Lithopone Basic information
Product Name:Lithopone
Synonyms:C.I.Pigmentwhite5;pigment white 5;LITHOPONE;Barium zinc sulfate sulfide;c.i. 77115;LITHOPONE B301 ZNS 28-30%;LithoponeB311;LithoponeZns+BaSO4
CAS:1345-05-7
MF:BaO5S2Zn2
MW:412.23
EINECS:215-715-5
Product Categories:UVCBs-inorganic;INORGANIC & ORGANIC CHEMICALS
Mol File:1345-05-7.mol
Lithopone Structure
Lithopone Chemical Properties
density 4.136~4.39
CAS DataBase Reference1345-05-7(CAS DataBase Reference)
EPA Substance Registry SystemC.I. Pigment White 5 (1345-05-7)
Safety Information
MSDS Information
ProviderLanguage
Pigment White 5English
Lithopone Usage And Synthesis
Chemical PropertiesLithopone is a white powder that is insoluble in water, but soluble in acids. It has high resistance to hydrochloric acid and silver ions.
UsesIn water and oil paints to provide thixotropy, improve gloss and flow.
UsesLithopone is a mixed zinc sulfide-barium sulfate pigment available in two types; one containing 30 percent zinc sulfide and one containing 60 percent zinc sulfide. Coprecipitation is achieved by reacting an aqueous solution of zinc sulfate with barium sulfide. The barium sulfide solution is prepared by reducing barite ore (BaSO4) with carbon.
UsesLithopone is mainly used in coating materials with relatively high pigment concentrations. Examples are primers, plastic masses, putties and fillers, artists’ colors, and emulsion paints. An important property of lithopone is its low binder requirement, giving paint products with good flow and application properties. It is suitable for almost all binder media, and has good wetting and dispersing properties. With optimum feed composition, good dispersion can be achieved simply by the action of a dissolver. It can be economically advantageous to use lithopone in combination with TiO2 pigments; the good hiding power of the TiO2 pigments is combined with the economic and technical advantages of lithopone. Due to the strong shift of the absorption band towards the blue, lithopone is especially useful as a white pigment for UV-cured paint systems. Zinc compounds have fungicidal and algicidal effects, and inclusion of lithopone or Sachtolith in paint formulations for exterior use therefore helps prevent the growth of algae or fungi.
The material advantages of lithopone are used in plastics (e.g., good lightfastness and clear bluish-white shade). The product also imparts very good extruding properties to the plastic resulting in high throughput rates and economic extruder operation. In fire-resistant systems, ca. 50% of the flame retardant antimony trioxide can be replaced by nontoxic lithopone without any adverse effect.
ApplicationLithopone is used as a pigment in paints, plastics, and printing inks. The particle size of it can be reduced through the use of polyvinyl alcohol (PVA) or sodium carbonate. PVA reduces particle size by absorbing the liquid and forming a gel-like substance around the particles. Sodium carbonate reduces particle size by forming a protective layer on the surface of the particles, which prevents them from clumping together. Lithopone also has analytical chemistry applications because it absorbs radiation well and can be used for identification purposes.
Lithopone Preparation Products And Raw materials
Raw materialsHydrochloric acid–>Sulfuric acid–>Potassium permanganate–>ZINC–>Zinc oxide–>Barium sulfate–>Zinc sulphate–>Calcium hypochlorite–>BARIUM SULFIDE–>Guaifenesin–>Zinc sulfide–>Zinc hypoxide–>Dye-fixing agent
Preparation ProductsPAINT–>Alkyd resin paint–>Various color alkyd ready mixed paint–>Interior and exterior wall coating–>Acrylic latex paint for interior wall–>latex paint

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