摘要:
Blue colored mica flake pigments are provided by coating mica flakes, or mica flakes optionally coated with a uniform metallic oxide layer, with a uniform layer of a low-solubility iron compound convertible into Berlin blue [ferric hexacyanoferrate(II)], and then converting this layer into Berlin blue.
摘要:
Pigmented substantially crack-free casein plastic compositions containing a minor, luster-imparting quantity of coated mica platelets, wherein at least 75% of the pigment particles possess an average platelet size of below 10 .mu.m., a thickness of about 0.1 to 0.7 .mu.m. and a ratio of diameter to thickness of about 10 to 200.
摘要:
A process for preparing nacreous pigments having improved gloss properties and based on mica platelets coated with metal oxides comprises suspending mica platelets in a solution containing titanium sulfate, the mica platelets having a coating comprising a homogeneous mixture of titanium dioxide, aluminum oxide and silicon dioxide, and further coating the suspended platelets by slow heating of the suspension.
摘要:
Nacreous pigments having improved transparency and tinctorial strength and based on mica flakes coated with metal oxides, have a metal oxide layer which is formed as a homogeneous mixed layer in which, in addition to titanium dioxide, there also is present silicon dioxide and aluminum oxide. These can be produced by coating mica in an aqueous suspension with a titanium dioxide hydrate layer and then washing, drying and calcining. Silicon dioxide and aluminum hydroxide are precipitated as a uniform layer together with the titanium dioxide hydrate. The new pigments can be used for pigmenting plastics, lacquers, paints and cosmetics, inter alia.
摘要:
A process for the preparation of carbon black-containing pigments consists essentially of precipitation of a carbon black-containing metal hydroxide or bismuth oxychloride layer on substrate particles in an aqueous suspension containing carbon black particles of particle size of below 1 mn. and washing, drying and optionally calcining the products. Flaky substrates, e.g., mica flakes coated with TiO.sub.2, are preferably employed. Carbon black-containing pigments obtained have carbon black particles incorporated in a metal hydroxide, metal oxide or bismuth oxychloride layer precipitated on the substrate in the presence of the carbon black.
摘要:
Mica flake-based lustrous pigments having a plurality of TiO.sub.2 and SnO.sub.2 layers thereon comprising at least one succession of rutile/SnO.sub.2 /rutile have improved properties, including light and weathering fastness.
摘要:
Lustrous pigments based on mica flakes coated with metal oxides have a very uniform coating layer of tin dioxide, which can contain aluminum oxide, or the hydrates thereof.
摘要:
Nacreous pigments having improved light fastness are based on mica flakes coated with metal oxides, wherein the metal oxide layer is formed as a homogeneous mixed layer in which, in addition to titanium dioxide, silicon dioxide and iron oxide are also present. To produce these pigments, mica is coated in an aqueous suspension by coprecipitation of a titanium dioxide hydrate, iron hydroxide and silicon dioxide to form a uniform layer. The flakes are then washed, dried and calcined.The pigments can be used for the pigmenting of plastics, lacquers, paints and toiletries.
摘要:
Lustrous pigments having a wide range of colors and especially suitable for the cosmetics industry are produced by forming an aluminum lake on a micaceous pigment coated with aluminum hydroxide.
摘要:
Nacreous pigments having a yellow powder color and an improved light-fastness comprise a mica platelet coated with titanium dioxide and on the titanium dioxide layer, a thin layer of calcined chromium oxide and/or chromium phosphate as a protective layer. The pigments are produced by coating mica platelets coated with metal oxides and/or hydroxides, with a thin layer of a sparingly soluble chromium(III) compound and calcining at about 500.degree.-1000.degree. C.