Coloration properties and clearability of phthalimide-derived monoazo disperse dyes containing ester groups / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 129, N° 5 (10/2013)  

[article]  inCOLORATION TECHNOLOGY > Vol. 129, N° 5 (10/2013) . - p. 352-359 Titre : Coloration properties and clearability of phthalimide-derived monoazo disperse dyes containing ester groups Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Jong-Yoon Choi, Auteur ; Eun-Mi Kim, Auteur ; Jae-Pil Kim, Auteur ; Andrew D. Towns, Auteur ; Chun Yoon, Auteur Année de publication : 2013 Article en page(s) : p. 352-359 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Absorption Colorants azoïques Colorimétrie Paramètres de solubilité Phtalimide Le phtalimide est un imide aromatique, c'est-à-dire un composé organique avec deux groupements carbonyle liés à un atome d'azote trigonal. C'est l'imide de l'acide benzène-1,2-dicarboxylique (acide phtalique). Propriétés : Le phtalimide est un solide blanc cristallisé à température ambiante. Il est pratiquement insoluble dans l'eau froide, très peu soluble dans le benzène et l'éther de pétrole, et assez soluble dans l'éthanol chaud, l'acide éthanoïque et les bases concentrées. Obtention : Le phtalimide est obtenu par réaction à chaud de l'anhydride phtalique avec l'ammoniac en solution aqueuse. Polyesters Solidité de la couleur Solubilité Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The coloration properties and clearability of disperse dyes prepared from phthalimide-derived diazo components and a coupling component containing two carboxylic acid ester groups have been investigated. Members of the series featured C2–C4 alkyl substituents on their phthalimidyl nitrogen atom. The nature of the N-alkyl group made no consistent difference to dye uptake on polyester. No correlation was found between percentage exhaustion and calculated solubility parameters. Wash fastness was extremely good. Comparison with analogues indicated that the diester motif was of significant extra benefit to wash fastness for phthalimide-derived dyes, but did not increase photostability above the lower range of commercial acceptability. Clearability was compared with that of dyes lacking one or both hydrolysable structural features, as well as with that of some industrial dyes. The novel dyes exhibited a greater tendency to be solubilised, consistent with hydrolysis of their ester and/or phthalimide functionalities. Note de contenu : - EXPERIMENTAL : Materials - Milling of dyes - Dyeing and reduction clearing procedure - Colorimetric measurements - Destination of dye exhaustion yields - Colour fastness testing - Testing the effect of simulated reduction clearing on dyes - RESULTS AND DISCUSSION : Dye uptake - Calculations of the solubility parameter - Colour properties of the dyes on polyester - Colour fastness - Assessment of clearability DOI : 10.1111/cote.12037 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12037/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19353 [article]

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Novel azo dyes derived from phthalimide. Part 1 : Synthesis and spectroscopic properties / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 124, N° 2 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 2 (2008) . - p. 92-99 Titre : Novel azo dyes derived from phthalimide. Part 1 : Synthesis and spectroscopic properties Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Chun Yoon, Auteur ; Andrew D. Towns, Auteur ; Mi-Hyeon Kim, Auteur ; Jeong-Min Jeon, Auteur Année de publication : 2009 Article en page(s) : p. 92-99 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of azo dyes has been synthesised based on N-alkylphthalimide diazo components featuring one of three different alkyl groups. An analogous set of dyes was prepared in which the N-alkylphthalimidylazo systems bore an o,o-dibromo-substitution pattern. In these cases, cyanodebromination was performed to give the corresponding dicyano analogues. All the synthesised intermediates and dyes were characterised by mass spectrometry, proton nuclear magnetic resonance spectroscopy and elemental analysis. The absorption maxima of the dyes in dimethylformamide (N,N-dimethyl ~) were observed to be in the range 435–608 nm and found to be consistent with results seen in previous studies of conventional monoazo disperse dyes. Replacement of both halogens in the dibromo-substituted dyes with cyano groups led to large bathochromic shifts (128–141 nm) in absorption maxima. Bathochromism was also observed when acetylamino groups were present on the coupler ring ortho to the azo link. However, variation of the N-alkyl function on the imido ring from n-butyl to sec-butyl and iso-propyl had little effect on absorption maxima, values being similar to that reported for the parent N-unsubstituted analogue. DOI : 10.1111/j.1478-4408.2008.00127.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00127.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3148 [article]

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Novel azo dyes derived from phthalimide. Part 2 / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 124, N° 6 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 6 (2008) . - p. 364-369 Titre : Novel azo dyes derived from phthalimide. Part 2 : Dyeing properties and colour fastness on polyester fibres Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Jong-yun Choi, Auteur ; Hyun-young Lee, Auteur ; Andrew D. Towns, Auteur ; Chun Yoon, Auteur Année de publication : 2009 Article en page(s) : p. 364-369 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The coloration and fastness properties of 18 carbocyclic monoazo disperse dyes bearing a phthalimide ring fused to the aromatic ring of their diazo components have been investigated. In each case, the phthalimidyl nitrogen atom was substituted with either a butyl, sec-butyl or isopropyl group, while the adjoined phenyl ring bore a substitution pattern typical of commercial colorants. Dye uptake and build-up onto both conventional and microfibre polyester through exhaustion dyeing were examined: while the expected tendency of greater exhaustion on microfibre was noted, there were few clear trends with respect to dye structure. The nature of the N-alkyl group made no consistent difference to dye uptake. Attempts to explain the observed percentage exhaustion values by mapping them to calculated partition coefficient or solubility parameter values were unsuccessful. Wash fastness tended to be best for blue dicyano-substituted derivatives, which may be as a result in part of these substituents promoting hydrolysis of the adjacent phthalimide ring to give more soluble phthalate species. In contrast, the dicyano dyes had relatively poor photostability compared with their unsubstituted analogues. DOI : 10.1111/j.1478-4408.2008.00164.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00164.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3245 [article]

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Preparation of pigmented ink-jet ink by a combination of surface treatments and synthetic dispersant / Chun Yoon in COLORATION TECHNOLOGY, Vol. 127, N° 3 (2011)  

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 3 (2011) . - p. 186-193 Titre : Preparation of pigmented ink-jet ink by a combination of surface treatments and synthetic dispersant Type de document : texte imprimé Auteurs : Chun Yoon, Auteur ; Jae-Hong Choi, Auteur Année de publication : 2011 Article en page(s) : p. 186-193 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Encre jet d'encre Noir de carbone Index. décimale : 667.3 Teinture et impression des tissus Résumé : Drop-on-demand ink-jet inks prepared from dyes usually show inadequate light and water fastness. Thus, in our previous paper, we studied black pigmented ink-jet inks with the aim of overcoming the drawbacks of dye-based ink by employing a variety of synthetic dispersants with gas black. In this study, pigmented ink-jet inks were prepared by a combination of the synthetic dispersant and the surface treatments of a furnace black that is more common than gas blacks. The results of this study show that the surface treatment of the furnace black and the use of the synthetic dispersant are useful in the preparation of ink-jet inks and endow them with properties that are comparable with those of commercial ink-jet inks. Note de contenu : EXPERIMENTAL : Equipment - Materials - Surface treatment of carbon black - Chemical synthesis of dispersant and preparation of dispersant solution - Preparation of pigment paste - Physical properties of pigment paste - Preparation of ink-jet ink formulation - Physical and printing properties of ink formulations RESULTS AND DISCUSSION : Surface treatment and synthetic dispersant - Preparation and physical properties of pigment pastes - Physical and printing properties of ink formulations DOI : 10.1111/j.1478-4408.2011.00297.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00297.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12197 [article]

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Preparation of thermally stable dyes derived from diketopyrrolopyrrole pigment by polymerisation with polyisocyanate binder / Chun Yoon in COLORATION TECHNOLOGY, Vol. 131, N° 1 (02/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 1 (02/2015) . - p. 2-8 Titre : Preparation of thermally stable dyes derived from diketopyrrolopyrrole pigment by polymerisation with polyisocyanate binder Type de document : texte imprimé Auteurs : Chun Yoon, Auteur ; Hye-Sun Kwon, Auteur ; Jae-Sung Yoo, Auteur ; Hyun-young Lee, Auteur ; Ji-Hye Bae, Auteur ; Jae-Hong Choi, Auteur Année de publication : 2015 Article en page(s) : p. 2-8 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants -- Solubilité Colorants -- Synthèse Pigments organiques Polyisocyanates Résines photosensibles Stabilité thermique Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four thermally stable and solvent soluble dyes were prepared from diketopyrrolopyrrole pigment via an N-alkylation reaction. To improve the thermal stability of the dyes, a hydroxyl functional group that could react with blocked polyisocyanates was introduced into the dyes. The prepared dyes had absorption maxima near 500 nm, and the chromaticity diagrams of all synthesised dyes exhibited smaller x and y values than those of CI Pigment Red 254, indicating that the colour of the synthesised dyes was close to an orange shade. The dyes reacting with blocked polyisocyanates showed extremely high thermal stability compared with analogous dyes not reacting with polyisocyanates. Note de contenu : - EXPERIMENTAL : Materials and instrumentation - Synthesis of dyes - Preparation of a colour filter photoresist - Preparation of a colour filter photoresist without polyisocyanates - Preparation of a colour filter photoresist with polyisocyanates - Preparation of glass sheets - Solubility investigation - Measurement of spectral and chromatic properties - Thermal stability measurement - RESULTS AND DISCUSSION : Dye synthesis - Dye solubility - Characterisation of spectral properties - Chromatic properties of spin-coated colour filters - Characterisation of the thermal stability of dyes DOI : 10.1111/cote.12119 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12119 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22967 [article]

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Syntheses of polymeric dispersants for pigmented ink-jet inks / Chun Yoon in COLORATION TECHNOLOGY, Vol. 124, N° 6 (2008)  

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Synthesis and spectroscopic properties of novel azo dyes derived from phthalimide / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 123, N° 6 (2007)  

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Synthesis and spectroscopic properties of novel phthalimide-derived monoazo disperse dyes containing ester groups / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

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Synthesis of quenchers to control the fluorescence of Rhodamine B and improve the contrast ratio of blue filters for LCDs / Hyun-young Lee in COLORATION TECHNOLOGY, Vol. 132, N° 4 (08/2016)  

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Synthesising polymeric dispersants to apply to carbon black pigmented mill bases for use in ink-jet inks / Chun Yoon ; Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 136, N° 1 (02/2020)  

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