1941-84-0Relevant articles and documents
Method For Directly Producing Fine-Particle Diketopyrrolopyrrol Pigments
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Page/Page column 4, (2010/06/11)
The invention relates to a method for directly producing fine-particle 1,4-diketopyrrolo[3,4-c]pyrrols of formula (1), wherein R1a, R1b, R2a and R2b independently represent hydrogen, halogen, C1-C4 alkyl, C1-C4 alkoxy, cyano or phenyl, said compounds being characterized by a maximum frequency distribution between 20 and 120 nm. According to the method, nitriles are reacted with succinic acid esters or lactames or enamines in an alkali medium to form a pigment salt, and then protolysis of the pigment alkali salt is carried out. Said method is characterized in that an effective quantity of a pigment dispersant of formula (II) is added during the protolysis of the pigment alkali salt. In formula (II), Q is a radical of an organic pigment from the group of perinone, quinacridone, quinacridonquinone, anthanthrone, indanthrone, dioxazine, diketopyrrolopyrrol, indigo, thioindigo, thiazineindigo, isoindoline, isoindolinone, pyranthrone, isoviolanthrone, flavanthrone or anthrapyrimidine pigments.
Synthesis and structural studies of new polyhydroxamic complexes of iron(III) that can be used in NMR. I. The preparation of ligands
Chaubet,Nguyen Van Duong,Courtieu,Gaudemer,Gref,Crumbliss
, p. 1107 - 1116 (2007/10/02)
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