Abstract: A method for dispersing graphite-like nanoparticles is described, wherein the graphite-like nanoparticles are dispersed in a continuous liquid phase while applying energy in the presence of the dispersing agent, using dispersing agents consisting of block copolymers, at least one block of which bears aromatic side chains that are bound via aliphatic chain links to the main chain of the block copolymer.

Abstract: The invention provides a process of preparation photonic crystals which is distinguished by high efficiency and which provide photonic crystals having an opalescent effect of high quality; the process comprises (a) providing a dispersion of mono-disperse spheres in a liquid, (b) applying the dispersion onto a plain surface of an absorbent substrate selected from the group consisting of paper, textile and wood, and (c) removing the liquid from the dispersion on the surface to produce the photonic crystals in the form of a tightly packed and regularly arranged structure of mono-disperse spheres in the resulted particles; using the process according to the invention, it is possible to produce photonic crystals usable as pigment particles with a high optical brilliance in the color and with a color stability for the use in, e.g., coating compositions and inks.

Abstract: The invention relates to an ink jet ink composition containing monodisperse polymer particles to provide an opaque ink with improved color brilliancy, ink jet ink sets based on this composition, and a methods for ink jet printing with the ink and/or ink jet sets.

Abstract: A multi-layer coating for coating a substrate surface, comprising at least one color-imparting layer, which contains three-dimensional photonic crystals as effect-imparting interference pigments.

Abstract: The invention relates to an ink jet ink composition containing monodisperse polymer particles to provide an opaque ink with improved color brilliancy, ink jet ink sets based on this composition, and a methods for ink jet printing with the ink and/or ink jet sets.

Abstract: A multi-layer coating for coating a substrate surface, comprising at least one color-imparting layer, which contains three-dimensional photonic crystals as effect-imparting interference pigments.

Abstract: Polymerized liquid-crystalline compositions are obtainable by radiation curing of mixtures comprising P0 a) one or more cellulose derivatives in which some or all of the hydroxyl groups of the cellulose are replaced by --OR, 13 O--CO--NH--R, --O--CO--R or --O--CO--OR, where each R can be identical or different and is an aliphatic or aromatic radical of up to 20 carbons,b) one or more polymerizable monomers andc) if desired, further additives.

Abstract: Cholesteric copolyisocyanates with repeating units of the formulae: ##STR1## and, where appropriate, of the formula ##STR2## where R.sup.1 is a chiral aliphatic or aromatic radical,R.sup.2 is a crosslinkable radical, andR.sup.3 is an achiral radical,and polymers obtainable by crosslinking the copolyisocyanates according to the invention with a polymerizable solvent, and pigments comprising the polymers according to the invention, are described.

Abstract: A copolymer based on monomers selected from the group consisting of dicarboximides, alkenyl isocyanates and alkenylurethanes of formula I: ##STR1## where R.sup.1 to R.sup.5, R.sup.6, X, Y, Z, M, and a-d are as defined in the specification.