COLORING LAMINAR COATED PIGMENT, AND METHOD OF PREPARING LAMINAR PIGMENT Russian patent published in 2000 - IPC

FIELD: chemical industry, more particularly manufacture of varnishes, cosmetic and plastic materials. SUBSTANCE: pigment comprises inorganic matrix coated with one or plurality reflecting layers which are thin transparent or semitransparent layers of metals or oxides thereof. Matrix is formed of precursor with silicon dioxide, silicate, boron oxide, borate, aluminium oxide, aluminate or mixture thereof. Matrix comprises modifiers, network-forming agents, soluble or insoluble colorants. Reflecting layer includes Ag, Au, Pa, Pt, Al, Cr, Cu, chromium oxide, iron oxide, titanium dioxide or mixture thereof. Liquid film of matrix material precursor is applied onto endless cape, dried and treated with acid. The resulting matrix is separated from endless cape and coated with reflecting layers. Laminar pigments have intensive luster, high covering power or transparency, are prepared by simple and economic method and have wide color spectrum. EFFECT: improved properties of the coloring laminar pigment. 30 cl, 24 ex, 2 dwg