Michael Gerlach , Justus Koedel , Sebastian Seibt , Benjamin Baumgärtner , Christoph Callsen , Gundula Voss , Florian Puchtler , Andy Weidinger , Georg Puchas , Daniel Leykam , Volker Altstaedt , Rainer Schobert , Holger Ruckdäschel , Bernhard Biersack
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引用次数: 0
Abstract
A small series of indigo derivatives were mixed with palygorskite or sepiolite, respectively, and heated at 150 °C overnight in order to prepare stable pigments. While mixtures with violet halo-indigos such as Tyrian Purple (6,6′-dibromoindigo) and its difluoro- and dichloro-derivatives formed blue pigments with a slight greenish hue upon heating, alkoxy-indigo derivatives turned olive green during the heating process when mixed with palygorskite or sepiolite. Mixtures of isatin and indigo with palygorsite led to the formation of green pigments. The pigments were analyzed by spectroscopy (UV-VIS and Raman) and electron microscopy. Thermal studies were carried out and the obtained pigments were stable at temperatures of up to 250 °C. Maya Blue and pigment samples derived from 6,6′-dichloroindigo were tested for their flame retarding properties in mixtures with cellulose acetate and both additives led to distinct heat release rate reductions.
期刊介绍：
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.
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