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Effects of isomerism on near infrared properties of perylene bisimide derivatives / Majid Mazhar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
[article]
Titre : Effects of isomerism on near infrared properties of perylene bisimide derivatives Type de document : texte imprimé Auteurs : Majid Mazhar, Auteur ; Majid Abdous, Auteur ; Kamaladin Gharanjig, Auteur ; Reza Teimuri-Mofrad, Auteur ; Mojdeh Zargaran, Auteur Année de publication : 2017 Article en page(s) : p. 204-217 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diffractométrie de rayons X
IsomérieEn chimie organique, on parle d'isomérie lorsque deux molécules possèdent la même formule brute mais ont des formules développées ou stéréochimiques différentes. Ces molécules, appelées isomères, peuvent avoir des propriétés physiques, chimiques et biologiques différentes.
On distingue différents types d'isomérie, notamment l'isomérie de constitution (isomérie plane) et l'isomérie de configuration (stéréoisomérie).
Pérylène bisimide
Pigments organiques
RéflectanceIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, five different perylene bisimide derivatives are synthesized, four of which are structural isomers. The pigments are used to prepare corresponding paints and their ultraviolet–visible–near infrared (NIR) reflectance is investigated on two optically different substrates, namely high absorptive and high reflective substrates. These pigments are classified according to their NIR properties. They show substantial differences in NIR reflectance, transmittance, and absorbance despite their structural similarities. This indicates that the NIR properties of perylene bisimide derivatives are dependent on the nature of N-substituent and electronic environment of the molecule. This study shows that the existence of bonds with high-frequency fundamental vibrations and their counts which were introduced as affecting parameters on the NIR properties of the perylene pigments is not the main affecting factor and we should seek it elsewhere such as the crystal structure and intermolecular interactions of the pigments. Note de contenu : - EXPERIMENTAL : Materials - Synthesis procedure - Instruments - Paint preparation
- RESULTS AND DISCUSSION : XRD analysis - UV-Vis-NIR reflectanceDOI : 10.1007/s11998-016-9843-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9843-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27802
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 204-217[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18674 - Périodique Bibliothèque principale Documentaires Disponible Golden organic crystals of an azobenzene derivative containing two ester bonds / Yukishige Kondo in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)
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Titre : Golden organic crystals of an azobenzene derivative containing two ester bonds Type de document : texte imprimé Auteurs : Yukishige Kondo, Auteur ; Kazuya Nakajima, Auteur ; Masakatsu Kato, Auteur ; Hidetaka Ohrui, Auteur ; Yutaka Takahashi, Auteur Année de publication : 2015 Article en page(s) : p. 255-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzène -- Dérivés
Cristaux
Esters
Pigments -- Synthèse
Pigments organiquesIndex. décimale : 667.2 Colorants et pigments Résumé : Recently we found while we were synthesising a cationic surfactant that a synthetic intermediate, 4,4?-bis{1-[2-(N,N-dimethylamino)]ethoxy}azobenzene, produced gold-coloured crystals [Matsumoto et al., J. Oleo Sci., 59, (2010) 151]. Here we describe how an azobenzene derivative, bis[4-(ethoxycarbonylmethoxy)phenyl]diazene, also forms gold-coloured crystals after recrystallisation from a mixture of acetone and water. The profile of the specular reflectance as a function of wavelength for the crystals is very similar to that for metallic gold plate, indicating that the crystals have a golden colour. The maximum specular reflectance of the crystals is 16%. Atomic force microscopy observation shows that the crystals have flat surfaces. X-ray diffraction measurements demonstrate the presence of a periodic structure in the crystals, which indicates that monolayers (lamellar structure) consisting of azobenzene molecules with a thickness of 1.42 nm are stacked in the crystals. The gold-coloured crystals are tolerant of ultraviolet light irradiation. The gold-coloured crystals may be useful as a substitute for conventional metallic pigments in specific coating applications. Note de contenu : - EXPERIMENTAL : Materials - Measurements - Synthesis of EtOCO-azo 1 - Preparation of gold-coloured crystals - Ultraviolet light irradiation
- RESULTS AND DISCUSSION : Synthesis of 1 and preparation of gold-coloured crystals - Surface analysis of crystalline 1 - Probable crystal structure of 1 - Tolerance to ultraviolet lightDOI : 10.1111/cote.12151 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12151 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24128
in COLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 255-258[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17231 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : High performance pigments (HPP) : Copper phthalocyanine (CPC) pigment : Part 2 Type de document : texte imprimé Auteurs : Tipanna Melkeri, Auteur Année de publication : 2018 Article en page(s) : p. 73-75 Langues : Anglais (eng) Catégories : Phtalocyanine de cuivre
Pigments -- Synthèse
Pigments organiques
Procédés de fabricationIndex. décimale : 667.2 Colorants et pigments Résumé : Copper phthalocyanine pigments are one of the largest consumed high performance organic pigments. AH copper phthalocyanine pigments are obtained from crude Copper phthalocyanine compound. Crude CPC is obtained by reacting phthalic anhydride, cuprous chloride, urea and solvent using ammonium molybdate as a catalyst. Crude CPC is manufactured by bake process and solvent process. Solvent process is commonly and commercial ly accepted process. There are many advantages of solvent process over bake process such as yield, quality and ease of operations. By using solvent process one can get about 91-94 % yield and high purity of about 98%. However, production of crude CPC is lead to generation of lots of water effluent which is threat to environment and aquatic animais. There is generatim'of ammonical nitrogen through ammonium carbonate which is dangerous to aquatic animais. Huge amounts of acid effluent is also generated during crude CPC manufacturing. It is a need of time to implement better process such as zero discharge process. This zero discharge process is economical if implemented effectively with value addition. India is one of largest manufacturer of crude CPC so, it's our responsibility to implement such environmentally friendly process. An improved process with less consumption of urea per kg crude. CPC is also now a days are more popular. Crude CPC are used to prepare blue and green pigments. Note de contenu : - MANUFACTURING OF CRUDE COPPER PHTHALOCYANING (CPC) : Bake process - Solvent process - Process involves following steps
- SILENT FEATURES OF SOLVENT PROCESS
- NEW PROCESS WITH ZERO DISCHARGE
- NEW PROCESS WITH LESS UREA CONSUMPTION
- USE OF CRUDE CPC
- FIGURES : 1a. Condensation reaction in glass lined reactor - 1b. Distillation of solvent from reaction mixture - 1c. Treatment with sulphuric acid to remove impurities - 1d. Filtration and drying - 2. Series reactor to manufacture crude CPCEn ligne : https://drive.google.com/file/d/1U5Hp29FXWs-A-kCEgOoYxtnvbPr428Fp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30693
in PAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 73-75[article]Est accompagné deRéservation
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Code-barres Cote Support Localisation Section Disponibilité 19991 - Périodique Bibliothèque principale Documentaires Disponible Influence of different dispersants on the quality and stability of aqueous quinacridone magenta pigment dispersion for ink-jet applications / Rafal Gaida in COLORATION TECHNOLOGY, Vol. 139, N° 6 (12/2023)
[article]
Titre : Influence of different dispersants on the quality and stability of aqueous quinacridone magenta pigment dispersion for ink-jet applications Type de document : texte imprimé Auteurs : Rafal Gaida, Auteur ; Kararzyna Dziubek, Auteur ; Katarzyna Krol, Auteur ; Monika Ostaszewska, Auteur ; Marian Wit, Auteur Année de publication : 2023 Article en page(s) : p. 637-653 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Dispersions et suspensions
Dispersions et suspensions -- Stabilité
Encre jet d'encre
Ethoxylate d'alkyle
MagentaLe magenta est un colorant rouge violacé d'aniline de synthèse inventé en 1858, appelé fuchsine ou roséine. C'est aussi la désignation normalisée du colorant primaire absorbant le vert dans la synthèse soustractive des couleurs en imprimerie et en photographie argentique.
Masse molaireLa masse molaire est la masse d'une mole d'une substance (un corps simple, un composé chimique). Elle s'exprime en grammes par mole (g·mol−1 ou g/mol).
Pigments -- Analyse
Pigments organiques
Polyacrylates
QuinacridoneLes pigments de quinacridone sont des pigments organiques de synthèses qui vont du rouge-orange au rouge-violet.
Ils sont utilisés depuis les années 1960 par les teinturiers et les fabricants de pigment set couleurs à peindre (et plus récemment par certains tatoueurs, comme pigment dans des encres de tatouage, avec un risque allergique).
Il s'agit de pigments très transparents, au fort pouvoir colorant mais modérément couvrants.
Leur transparence permet de varier les teintes selon la densité et l'épaisseur de l'application.
Terpolymère styrène anhydride maléïqueIndex. décimale : 667.2 Colorants et pigments Résumé : The stability of water-based pigment dispersions is a key factor in determining their utility in ink-jet applications, and the appropriate choice of dispersant plays a special role. Among the pigment formulations tested to date, literature data on magenta pigments are very limited. Thus, the goal of this work was to study the influence of the type and loading of dispersants on the quality and stability of quinacridone magenta pigment dispersions. Three different commercially available dispersants were tested: (1) a cationic styrene-maleic anhydride copolymer, (2) an anionic polyacrylate, and (3) a nonionic alkyl ethoxylate. Pigment and dispersing agents were analysed using the Fourier Transform–infrared method. The stability of pigment dispersions was determined by comparative studies of changes in the pigment particle size, viscosity, pH, filtration time, optical density and gloss during the accelerated ageing test. Moreover, Turbiscan AGS and LUMiFuge analysers were used for evaluations of the instability of the dispersions. The properties of each dispersing agent affected the performances of the different dispersants. The highest stability for the pigment formulations was provided using the nonionic dispersant (small particle size, < 60 nm; the lowest viscosity < 60 mPa·s at the optimal dispersant content; favourable results of the filtration test; the highest pigment dispersability, proven by optical density and gloss). The Turbiscan AGS and LUMiFuge results indicated that the stability of all tested quinacridone magenta pigment dispersions was excellent (Turbiscan Stability Index values below three, and no significant differences in transmission profiles, respectively). However, it was found that the measurement results were influenced by the viscosity of the formulations. Note de contenu : - EXPERIMENTAL : Materials - Equipment and measuring conditions - Methods
- RESULTS AND DISCUSSION : Analysis of the magenta pigment - Analysis of the dispersing agents - Stability study of pigment dispersions
- Table 1 : Dispersant type active matter content used in the prepared Magenta Pigment dispersions
- Table 2 : Molar mass of studied dispersants determined by gel permeation chromatographyDOI : https://doi.org/10.1111/cote.12678 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12678 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40116
in COLORATION TECHNOLOGY > Vol. 139, N° 6 (12/2023) . - p. 637-653[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24320 - Périodique Bibliothèque principale Documentaires Disponible Innovations put soul into blues / Raimund Schmid in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4595 (04/2014)
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Titre : Innovations put soul into blues Type de document : texte imprimé Auteurs : Raimund Schmid, Auteur ; Paul Brown, Auteur Année de publication : 2014 Article en page(s) : p. 42-43 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Carrosseries
Automobiles -- Matériaux
Bleu (couleur)
Dioxyde de titane
Mica
Pigments à effets spéciaux
Pigments inorganiques
Pigments organiques
RéflectanceIndex. décimale : 667.2 Colorants et pigments Résumé : Superior blue interference pigments in combination with new organic high performance pigments.
New developments in the area of organic non-flop blue heliogen and paliogen pigments and game-changing Lumina Royal interference pigments are giving access to blue automotive shades with so far unknown chroma levels and differentiated colour travel.En ligne : https://drive.google.com/file/d/1iLC_NWXsXF5eK6X17PwnmMyxp8AfPbnR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21156
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4595 (04/2014) . - p. 42-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16200 - Périodique Bibliothèque principale Documentaires Disponible A introduction to organic pigment / Peter Lewis in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
PermalinkLead chromate replacement - old hat, but still a long process ? / Jürgen Ott in SURFACE COATINGS INTERNATIONAL, Vol. 98.4 (09/2015)
PermalinkLead chromate replacement - old hat, but still a long process ? / Jürgen Ott in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 205, N° 4610 (07/2015)
PermalinkMastering coloured metallics / Scott Heitzman in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4603 (12/2014)
PermalinkLes matières plastiques brillent / Eglantine Maugard in CAOUTCHOUCS & PLASTIQUES, N° 797 (09/2001)
PermalinkMélanines végétales : une protection physiologique de la peau / Carlo Ghisalberti in PARFUMS COSMETIQUES ACTUALITES, N° 164 (04-05/2002)
PermalinkOrganic or inorganic / Roland Valin in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4502 (07/2006)
PermalinkPermalinkPeak performance, solvent-based dispersing agents for Cu-phthalocyanine pigments / Manfred Jorna in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4591 (12/2013)
PermalinkPhysical characterisation of organic pigment powders / M. McGarvey in SURFACE COATINGS INTERNATIONAL, Vol. 80, N° 9 (09/1997)
PermalinkPigment stabilisation / Stefan Möβmer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4507 (12/2006)
PermalinkPermalinkLe plastique hisse les couleurs in CAOUTCHOUCS & PLASTIQUES, N° 738 (02/1995)
PermalinkPreparation 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)
PermalinkPreparation of thermally stable dyes derived from diketopyrrolopyrrole pigment by polymerisation with polyisocyanate binder / Chun Yoon in COLORATION TECHNOLOGY, Vol. 131, N° 1 (02/2015)
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