Adsorption characteristics of ionic and nonionic surfactants on hydrophobic pigment in aqueous medium / Hikmet Sis in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 244-249 Titre : Adsorption characteristics of ionic and nonionic surfactants on hydrophobic pigment in aqueous medium Type de document : texte imprimé Auteurs : Hikmet Sis, Auteur ; Mustafa Birinci, Auteur Année de publication : 2012 Article en page(s) : p. 244-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Colorants -- Adsorption Hydrophobie Nonylphenol éthoxylates Oléate de sodium Phtalocyanine de cuivre Potentiel zeta Surfactants Index. décimale : 667.3 Teinture et impression des tissus Résumé : The current study is based on the investigation of the adsorption properties of ionic and nonionic surfactants on an organic hydrophobic pigment powder, namely, β-copper phthalocyanine, in aqueous medium. The nonionic surfactants, selected systematically to represent varying degrees of ethoxylation, are nonylphenol ethoxylates, whereas the ionic surfactant is sodium oleate, a carboxylate-type anionic reagent. The adsorption of surfactants was assessed qualitatively by surface analysis of powders, before and after the adsorption of the surfactants. The experimental results were explained by the structural and other properties of the surfactants and the surface properties of the pigment. The specific adsorption of surfactants on pigments was verified by zeta potential measurements, as they altered the zeta potential values to a great extent. Nonionic surfactants decreased the absolute value of the zeta potential of the powder; whereas anionic surfactant sodium oleate shifted the zeta potential to more negative values. On the one hand, Fourier Transform–infrared and X-ray diffraction examinations of the pigments did not show any noticeable evidence for surfactant untreated or treated copper phthalocyanine. On the other hand, thermal analysis (both thermogravimetric and differential thermal analysis) showed clear evidence of the surfactants on both pigments, as substantial changes in thermogravimetric curves were assessed. Note de contenu : - EXPERIMENTAL : Materials - Zeta potential measurements - RESULTS AND DISCUSSION : Zeta potential of copper phthalocyanine blue pigment - Interactions of surfactants and pigments DOI : 10.1111/j.1478-4408.2012.00369.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15128 [article]

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Copper phthalocyanine alpha blue (15.0, 15.1 and 15.2) / Tipanna Melkeri in PAINTINDIA, Vol. LXVIII, N° 4 (04/2018)  

[article]  Accompagne High performance pigments (HPP) / Tipanna Melkeri in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018) inPAINTINDIA > Vol. LXVIII, N° 4 (04/2018) . - p. 69-71 Titre : Copper phthalocyanine alpha blue (15.0, 15.1 and 15.2) : Copper phthalocyanine (CPC pigment : Part 3) Type de document : texte imprimé Auteurs : Tipanna Melkeri, Auteur Année de publication : 2018 Article en page(s) : p. 69-71 Langues : Anglais (eng) Catégories : Phtalocyanine de cuivre Pigments organiques Index. décimale : 667.2 Colorants et pigments Résumé : Copper phthalocyanine pigment (CuPC) is one of the most stable pigments towards light, temperature and chemicals. It exists in different crystal modifications. Crystal modifications α, and β have gained considerable commercial importance in industry . Crystal modification "α" is called pigment blue 15.0. It is obtained by acid pasting of crude CuPC. Pigment blue 15.0 is only stable upto 170°C. It shows very poor solvent resistant and also limited temperature stability. PB15.1 is improved version of PB15.0 with higher thermal stability but poor solvent stability. High thermal stability is achieved by surface modification of PB15.0 with suitable additive. Because high thermal stability it is used in all types of plastics and rubbers. PB15.2 is improved version of 15.1 with high solvent and thermal stability. All grades of pigment alpha blue are manufactured by process called acid pasting. Pigment alpha blue is used in various applications such as plastics, rubbers, ceramics, cements, inks, paints and cosmetics. Due to its high thermal stability, it is used in high performance coatings and engineering plastics. Note de contenu : - Manufacturing process of pigment "a" blue - Pigment properties of "a" blue pigment - Applications of pigment "a" blue - Fig. 1 : Crystal structure of pigment blue 15.0 (pigment "a" blue) - Fig. 2 : Reaction steps to manufacture heat stabiliser additive for PB15.1 - Fig. 3 : Schematic diagram showing manufacturing process of pigment blue 15, 15.1 and 15.2 - Table 1 : Comparative pigment properties of PB 15.0, 15.1 and PB 15.2 (5 is excellent and 1 is poor) - Table 2 : Comparative pigment properties of PB 15.0, 15.1 and PB 15.2 - Table 3 : Various applications of PB 15.0, 15.1 and PB 15.2 and their suitability En ligne : https://drive.google.com/file/d/175UnwNXTiFfQ9Ylaf45i09vVaV4fIHDj/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30700 [article]

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Fast fading blues : the inside story / Roberto Mazzari in EUROPEAN COATINGS JOURNAL (ECJ), N° 2 (02/2014)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 2 (02/2014) . - p. 32-35 Titre : Fast fading blues : the inside story : Indoor durability of phthalocyanines can be worse than expected Type de document : texte imprimé Auteurs : Roberto Mazzari, Auteur ; Umberto Dainese, Auteur ; Giovanni Marsili, Auteur Année de publication : 2014 Article en page(s) : p. 32-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Décoloration Dioxyde de titane Formulation (Génie chimique) Ozone Phtalocyanine de cuivre Pigments inorganiques -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : Copper phthalocyanine pigment blues show good light and weather fastness in exterior paints, but rapid fading has sometimes been observed in interior applications. Lights levels, binder type and the photoactivity of titanium dioxide appeared to have no significant effect. However, ozone in the air was shown to degrade the chromophore groups in the pigments. Note de contenu : - Test formulations and application procedure - Initial results reveal some clear trends - Light and photoactivity of TiO2 have little effect - Sealing the test panels prevents fading - Accelerated ozone test shows rapid colour loss - Reactions studied by X-ray photoelectron spectroscopy - Spectroscopy confirms degradation is due to ozone En ligne : https://drive.google.com/file/d/1iKtpGMKv5HfI4YjxMIsr3Rz0pta0J7IT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20394 [article]

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High performance pigments (HPP) / Tipanna Melkeri in PAINTINDIA, Vol. LXVIII, N° 2 (02/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 2 (02/2018) . - p. 90-93 Titre : High performance pigments (HPP) : Copper phthalocyanine (CPC) pigment : Part 1 Type de document : texte imprimé Auteurs : Tipanna Melkeri, Auteur Année de publication : 2018 Article en page(s) : p. 90-93 Langues : Anglais (eng) Catégories : Bleu (couleur) Matériaux hautes performances Phtalocyanine de cuivre Pigments inorganiques Structure moléculaire Index. décimale : 667.2 Colorants et pigments Résumé : Copper phthalocyanine pigments have been rulling the pigment industry ever since their commercialization. They exhibit excellent brilliant shades, high tinting strength, low cost and high performance. Copper phthalocyanine pigment is first discovered accidently in the year 1907 by Braun and Tchermiac. Copper phthalocyanine pigment obtained by reacting phthalic anhydride , urea, cuprous and high boiling solvents in presence of ammonium molybdate as a catalyst, product se obtained is called crude CPC. The phthalocyanine molecule is structurally similar to that of porphine. Chemically one can call copper phthalocyanine the copper complex of tetraazatetrabenzoporphine. The central metal atom is covalently bonded with two nitogens of the porphine ring and aise has co-ordinate linkage with two other nitrogens of the same ring. CPC is available in various isomeric crystals forms, they are named as a, b,Y, d, and e. Various grades of copper phthalocyanine pigments are available commercially depending upon the crystal form of CPC. Pigment blue 15.3 is widely used blue pigment which is b form, CPC. Note de contenu : - HISTORY OF CPC : Chemistry of copper phthalocyanine - COPPER PHTHALOCYANINE USING PHTHALONITRILE : Reaction of phthalonitrile and cupric chloride - Reaction of phthalonitrile and cuprous chloride - Reaction of phthalonitrile and copper - COPPER PHTHALOCYANINE STRUCTURE - PRODUCTION OF CPC - FIGURES : 1. Scheme to prepare o-cyanobenzamide - 2. Reaction scheme for preparation of phthalonitrile - 3. Reaction scheme to prepare blue coloured compound - 4. Reaction mechanism of formation of phthalimide - 5a Reaction mechanism of cyclotetramerisation - 5b. Reaction mechanism involved in formation of mono chloro CPC - 6. Reaction mechanism involved when cuprous chloride used with phthalonitrile - 7. Reaction mechanism involving copper metal and phthalonitrile - 8a. Forme of crystal structure CPC - 8b. Form of crystal structure of CPC En ligne : https://drive.google.com/file/d/1I1sLaBtRykvH0sRjwT71uvBdXvXrc16T/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30344 [article]

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High performance pigments (HPP) / Tipanna Melkeri in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 73-75 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 fabrication Index. 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 CPC En ligne : https://drive.google.com/file/d/1U5Hp29FXWs-A-kCEgOoYxtnvbPr428Fp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30693 [article]

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Peak performance, solvent-based dispersing agents for Cu-phthalocyanine pigments / Manfred Jorna in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4591 (12/2013)  

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The application of x-ray powder diffraction for the analysis of synthetic organic pigments. Part 1: dry pigments / Suzanne Quillen Lomax in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 3 (05/2010)  

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Understanding dispersion of copper phthalocyanine alpha blue pigment in polyethylene masterbatch with the use of wax / Mert Yücetürk in COLORATION TECHNOLOGY, Vol. 136, N° 6 (12/2020)  

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