Preparation of some coloured chelates of 2-mercapto-4-picoline-N-oxide and their applications as new pigments / A. Mirhabibi in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B4 (12/2004)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B4 (12/2004) . - p. 285-287 Titre : Preparation of some coloured chelates of 2-mercapto-4-picoline-N-oxide and their applications as new pigments Type de document : texte imprimé Auteurs : A. Mirhabibi, Auteur ; R. Aghababazadeh, Auteur ; Mohammad Edrissi, Auteur Année de publication : 2004 Article en page(s) : p. 285-287 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chélates Ligands Pigments -- Synthèse Pigments organiques Index. décimale : 667.2 Colorants et pigments Résumé : The sulphur-containing ligand 2-mercapto-4-picoline-N-oxide (MPN) was prepared from 2-bromo-4-picoline by peracetic oxidation and the reaction of its oxidation product with thiourea, and finally hydrolysis with sodium hydroxide solution. The preliminary reaction of MPN with metal ions showed that from 25 common metal ions examined, only Fe(III) and Cu(II) gave 3:1 and 2:1 stable insoluble and intense coulored chelates which were violet and green respectively. Al(III), Y(III), Ce(IV), Th(IV), Pb(II), Mn(II), Mg(II), Sr(II), Ba(II) and Ca(II) gave no precipitate. Hg(II), Ga(III), Tl(II), Bi(III), W(IV), Zr(IV), Zn(II) and Ag(I) gave whites. Ti(IV), V(V), Co(II), Ni(II) and Pd(II) gave pale coloured chelates. The reaction of MPN with Fe(III) and Cu(II) ions were quantitative. Both complexes had good pigment properties and should prove suitable to plastics, inks, board markers and textile printing. Note de contenu : - Table 1 : The results of melting point measurements and elemental microanalysis - Table 2 : Quantitative precipitation of Cu (II) and iron (III) by MPN - Table 3 : ε values, bulk densities and oil absorption of MPN chelates - Table 4 : Colorimetric data for green and violet pigments. (CIE lab = l*a*b* with source D65 and observer 10°) DOI : 10.1007/BF02699678 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699678.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5450 [article]

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Synthesis of gold pearlescent pigment via heat treatment of mica / A. Mirhabibi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 1 (03/2008) . - p. 73-76 Titre : Synthesis of gold pearlescent pigment via heat treatment of mica Type de document : texte imprimé Auteurs : A. Mirhabibi, Auteur ; R. Aghababazadeh, Auteur ; M. Esfidari, Auteur Année de publication : 2008 Article en page(s) : p. 73-76 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Mica Pigments -- Synthèse Pigments nacrés Traitement thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Pearlescent pigments are widely used to decorate ceramic tableware and architectural ceramics. Coating of mica with high-refractive metal oxides such as titanium oxide is one of the most important synthesis methods of these pigments. However, this process is expensive and long. Moreover, because of the complexity of the process, it is difficult to control and obtain consistent color. This depends on the thickness of the deposited thin film layer. In this study, a low-cost and easy method is proposed to synthesize gold pearlescent pigment. In this case, bulk mica (phlogopite) is heat-treated at appropriate temperatures, determined from related differential thermal analysis (DTA) profiles. Then, the obtained materials are milled for about 2 h and sieved in the 20–60 µm range. X-ray diffraction (XRD) and goniospectrophotometery are used for characterization of the obtained pigment. XRD results showed a few changes in related patterns of the primary sample. In this case, a part of the initial phase of phlogopite was changed to Mg2SiO4 (forsterite) and K2MgSi5O12 (leucite). Goniospectrophotometer results demonstrated the highest reflectance in the 560–570 nm range (yellow color), and showed a satisfactory level of brightness and lightness of the obtained gold color. DOI : 10.1007/s11998-007-9048-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9048-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3616 [article]

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