Process for the production of flake-form, crystalline particles having an aurivillius structure and the use thereof as effect pigments or substrates thereof
AssigneeMerck Patent GmbH
InventorsChristoph Schmidt, Carsten Handrosch, Tanja Delp, Andrea Heyland, Johann Bauer
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Abstract
A process for the production of flake-form, crystalline particles having an aurivillius structure, the use thereof as effect pigments or as substrates of effect pigments, furthermore, effect pigments which contain coated or uncoated flake-form, crystalline particles having an aurivillius structure as substrates, and the use thereof in various products.
Claims17
A process for the preparation of crystalline compounds having an aurivillius structure, in which the starting compounds are mixed with a salt mixture comprising NaCl and Na2SO4 and optionally one or more assistants to give a homogenised salt matrix/oxide mixture and are heated at 800-1200° C.
An effect pigments comprising coated or uncoated flake-form crystalline particles having an aurivillius structure.
An effect pigments comprising coated or uncoated flake-form crystalline particles having an aurivillius structure, wherein the flake-form crystalline particles having an aurivillius structure are produced by a process in which the starting compounds are mixed with a salt mixture comprising NaCl and Na2SO4 and optionally one or more assistants to give a homogenised salt matrix/oxide mixture and are heated at 800-1200° C.
A product selected from paints, coatings, automobile paints, powder coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, paper, paper coatings, toners for electrophotographic printing processes, seed, greenhouse sheeting, tarpaulins, absorbers for the laser marking of paper and plastics, absorbers in the laser welding of plastics, cosmetic formulations, pigment pastes, pigment preparations and dry preparations, said product comprising an effect pigment comprising coated or uncoated flake-form crystalline particles having an aurivillius structure.
Dependencies are inferred from the claim text.