Abstract: The present invention relates to a photochromic ink, the process for its preparation which is based on a spiropyran powder obtainable by melting, cooling and crushing, and to a new form of a spiropyran obtainable thereby. Said process to prepare a photochromic ink comprises the steps of a) heating and melting the spiropyran at a temperature below 250 C, b) cooling the melt to obtain a solidified spiropyran, c) crushing the solidified spiropyran to obtain a powder, d) optionally adding the powder to a binder providing the basis for the photochromic ink.

Abstract: The present invention relates to a photochromic ink, the process for its preparation which is based on a spiropyran powder obtainable by melting, cooling and crushing, and to a new form of a spiropyran obtainable thereby. Said process to prepare a photochromic ink comprises the steps of a) heating and melting the spiropyran at a temperature below 250 C, b) cooling the melt to obtain a solidified spiropyran, c) crushing the solidified spiropyran to obtain a powder, d) optionally adding the powder to a binder providing the basis for the photochromic ink.

Abstract: The present invention relates to time-temperature indicator (TTI) systems comprising indolenin based spiropyrans containing a cyclohexyl residue of formula (I), a method of manufacturing the time temperature indicator system, and a method of determining the time temperature history of perishable goods using the system. Moreover, the invention relates to a matrix selected from a printing ink or printing ink concentrate, paint, varnish, label, packaging material, and polymeric material comprising the system.

Abstract: The present invention is directed to 2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxo-propyl]azo]-benzoic acid (C.I. Pigment Yellow 151): (I), characterized by a ?E* (black/white) in masstone below 22.0±0.7, a process for its preparation and its use for pigmenting macromolecular organic materials of natural or synthetic origin. The pigment has high opacity and high color strength.

Abstract: The present invention is directed to 2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxo-propyl]azo]-benzoic acid (C.I. Pigment Yellow 151): (I), characterized by a ?E* (black/white) in masstone below 22.0±0.7, a process for its preparation and its use for pigmenting macromolecular organic materials of natural or synthetic origin. The pigment has high opacity and high color strength.

Abstract: The present invention relates to azo dyes of formula (1) which are soluble in organic solvents, wherein R1 is —CN, —COOR5, —CONR6R7 or a heterocyclic ring, R2 is unsubstituted or substituted alkyl, unsubstituted or substituted aryl, —CF3, —COOR5, —CONR6R7 or —COR5, R3 is hydrogen, —SO3M, alkyl, alkoxy, alkylcarbonyl, —NO2 or halogen, R4 is substituted aryl, substituted heteroaryl or an aryl-N?N-aryl radical, wherein one or both of the aryl radicals in aryl-N?N-aryl is/are unsubstituted or substituted, or a radical heteroaryl-N?N-heteroaryl, wherein one or both of the heteroaryl radicals in heteroaryl-N?N-heteroaryl is/are unsubstituted or substituted, R5 is hydrogen, alkyl or unsubstituted or substituted aryl, R6 is hydrogen, alkyl or unsubstituted or substituted aryl, R7 is hydrogen, alkyl or unsubstituted or substituted aryl, M+ is a cation, n is a number 1, 2 or 3 and m is a number 1, 2 or 3, to a process for the preparation thereof and to the use thereof in the production of colored plastics or polymeric

Abstract: Bisazoquinolone pigments which, in one of the tautomeric forms thereof, correspond to formula (1) wherein W is the radical of an unsubstituted or substituted C6-C24aryl or the radical of an unsubstituted or substituted heteroaryl, Ar1 is unsubstituted or substituted C6-C24aryl or unsubstituted or substituted heteroaryl, Ar11 is unsubstituted or substituted C6-C24aryl or unsubstituted or substituted heteroaryl, R1 R1, R2, R10, R11, and R12 are each independently of the others hydrogen, C1-C6alkyl, halogen, cyano, CF3, nitro, NR3R4, COOR4, NR4COR3, COOX+, COR4, OR4, SR3, S02R3, S02NR3R4, S03-X+, or C6-C24aryl unsubstituted or mono- or poly-substituted by R5, R3 is C1-C6alkyl, or C6-C12aryl unsubstituted or mono- or polysubstituted by halogen, hydroxy, OR7, cyano, nitro, SR7, NR6R7, COOR7, CONR6R7, NR6COR7, NR6COOR7, COO—X+, COR4, OR4, S02R7, S02NR6R7, S03-X+ or by S03R7, R4 is hydrogen or has the same meanings as R3, R5 is hydrogen, C1-C4alkyl, halogen, nitro, NR7R8 or OR7, R6 is hydrogen or C1-C3alkyl, R7 and

Abstract: The present invention relates to azo dyes of formula (1) which are soluble in organic solvents, wherein R1 is —CN, —COOR5, —CONR6R7 or a heterocyclic ring, R2 is unsubstituted or substituted alkyl, unsubstituted or substituted aryl, —CF3, —COOR5, —CONR6R7 or —COR5, R3 is hydrogen, —SO3M, alkyl, alkoxy, alkylcarbonyl, —NO2 or halogen, R4 is substituted aryl, substituted heteroaryl or an aryl-N?N-aryl radical, wherein one or both of the aryl radicals in aryl-N?N-aryl is/are unsubstituted or substituted, or a radical heteroaryl-N?N-heteroaryl, wherein one or both of the heteroaryl radicals in heteroaryl-N?N-heteroaryl is/are unsubstituted or substituted, R5 is hydrogen, alkyl or unsubstituted or substituted aryl, R6 is hydrogen, alkyl or unsubstituted or substituted aryl, R7 is hydrogen, alkyl or unsubstituted or substituted aryl, M+ is a cation, n is a number 1, 2 or 3 and m is a number 1, 2 or 3, to a process for the preparation thereof and to the use thereof in the production of coloured plastics or polym

Abstract: Preparation of pyrimido[5,4-g]pteridine of formula I wherein A1, A2, A3 and A4 are each independently of the others —NR1R2, wherein R1 and R2 are hydrogen, C1-C8alkyl, —CO—C1-C8alkyl, —CO—C6-C14aryl, —COO—C1-C8alkyl, —COO—C6-C14aryl, —CONH—C1-C8alkyl or —CONH—C6-C14aryl, or —OH, —SH, hydrogen, C1-C8alkyl, C1-C8alkoxy, or C6-C14aryl or —O—C6-C14aryl each unsubstituted or mono- or poly-substituted by halogen, nitro, cyano, —OR10, —SR10, —NR10R11, —CONR10R11, —COOR10, —SO2R10, —SO2NR10R11, —SO3R10, —NR11COR10 or by —NR11COOR10, wherein R10 and R11 are each independently of the other hydrogen, C1-C8alkyl, C5-C12cycloalkyl or C2-C8alkenyl, by a) reacting the pyrimidine of formula II with the pyrimidine of formula III in the presence of an acid and, if desired, of a solvent, the molar ratio of

Abstract: A process for mass coloring high molecular weight organic material by using a pyrimidopteridine of formula I and/or II ##STR1## or a mixture thereof, wherein A, B, C and D are each independently of one another --NH.sub.2, --OH, hydrogen, C.sub.1 -C.sub.4 -alkyl; phenyl, biphenyl or naphthyl which are unsubstituted or substituted by halogen, --OH, --NH.sub.2, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy; --NHR.sub.1, --N(R.sub.1).sub.2 or ##STR2## wherein R.sub.1 is C.sub.1 -C.sub.4 alkyl; phenyl which is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 -alkoxy, or --COXR.sub.2,X is a direct bond, --O-- or --NH--, andR.sub.2 is C.sub.1 -C.sub.4 alkyl; phenyl which is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 -alkoxy, with the proviso that at least two of the radicals A, B, C and D are --NH.sub.2 or --OH.

Abstract: The 2,4,5,7-tetraaminopyrimido[5,4-g]pteridine ##STR1## characterized by a hue-angle h of not less than 98, processes for preparing the pteridine I of the invention, novel, insoluble 2,4,5,7-tetraaminopyrimido[5,4-g]pteridine salts, their preparation and the use of the pteridines of the invention.