Particles comprising a substrate and an anion-binding layer

摘要

u Particles (I) comprising a substrate (A) and an anion-binding layer (B) containing one or more anion-forming organic active substances (II). Independent claims are included for (1) a method (M1) for the production of (I) by stirring a suspension of substrates, metal cation salts, active substance salt(s) and optionally dye salt(s) and alkali and/or urea in solvent(s) at 50-120[deg]C to form an anion-binding layer (containing (II) and optionally dye) on the substrate, and then isolating, washing, drying and optionally sieving the product (2) a similar method (M2) in which the initial product (made without (II) or dye) is added to a solution of (II) and optionally anion-forming dye with stirring (3) cosmetics, pharmaceuticals, formulations, varnish, paints, plastics, film, documents, certificates, seeds, food or drug coatings, pigment preparations and dry preparations containing (I) .