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Nanocellulose : novel additive for coating films / Archana Mahapatra in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 53-54 Titre : Nanocellulose : novel additive for coating films Type de document : texte imprimé Auteurs : Archana Mahapatra, Auteur ; Sharmila Patil, Auteur ; Jyoti Dhakane, Auteur ; A. K. Bharimalla, Auteur ; P. G. Patil, Auteur Année de publication : 2018 Article en page(s) : p. 53-54 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Chimie écologique Nanoparticules Revêtements -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Sustainability, green chemistry and industrial ecology are the pillars of development of next generation materials, products and processes. The unique properties of nanocellulose makes it versatile to be used in various industries. It has the potential to be a novel, green, eco-friendly additive in paint and coating formulation by improving the mechanical, optical and rheological properties. Being derived from bio based polymers of agricultural and biomass feedstock, it can form the basis for a portfolio of sustainable, eco-efficient product which will be competent and capture the petroleum based products dominated current market. Note de contenu : - Nanocellulose - Application of nanocellulose in coatings En ligne : https://drive.google.com/file/d/1y7eKzzUgyNfGjIi1p3oRRgzbHPRfJO_L/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30690 [article]

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Role of cobalt drier and its replacement with next generation driers in high solid alkyd based systems / Poonam More in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 55-62 Titre : Role of cobalt drier and its replacement with next generation driers in high solid alkyd based systems Type de document : texte imprimé Auteurs : Poonam More, Auteur ; Yogesh B. More, Auteur Année de publication : 2018 Article en page(s) : p. 55-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cobalt -- Produits de remplacement Haut extrait sec Molybdène Polyalkydes Polymérisation par oxydation Réticulants Revêtements:Peinture Vanadium Le vanadium est un élément chimique, de symbole V et de numéro atomique 23. C'est un métal rare, dur et ductile que l'on trouve dans certains minerais. Il est principalement utilisé dans les alliages. Il possède une bonne résistance à la corrosion par les composés alcalins, ainsi qu'aux acides chlorhydrique et sulfurique. Il s'oxyde rapidement à environ 933 K. Le vanadium possède une bonne force structurelle ainsi qu'une faible section efficace d'interaction avec les neutrons de fission, ce qui le rend utile dans les applications nucléaires. C'est un métal qui présente à la fois des caractéristiques acide et basique. Index. décimale : 667.9 Revêtements et enduits Résumé : This article depicts an overview of chemistry and various types of driers used in auto-oxidative type of curing systems. The system is mainly comprised of high solid alkyd. Driers are metal salts which catalyse auto oxidation process. Several metal driers have been used in paint industries for decades. However, as we move towards greener technology, there is a need for replacing the traditional metal driers with more ecofriendly metal driers by technological breakthroughs. Cobalt drier is one of the essential drier of th is category and nowadays becoming area of concern for futuristic point of view. The pronounced genotoxicity and carcinogenicity of cobalt compounds stimulate the legislative pressure on the paint producing industry to replace these compounds. Understanding exact role of Cobalt drier in auto-oxidative type of system and finding perfect fit for its replacement is need of the day. Several investigations and practical approaches proposed the use of iron, strontium, molybdenum and vanadium compounds as the replacement of cobalt based drier in high solid alkyd systems. Hence, we need to start making use of these next generation driers to take it to the next level. Note de contenu : - AUTOXIDATION IN PRESENCE OF COBALT DRIER : Main reasons for reviewing cobalt drier - REPLACEMENT OF COBALT WITH NEXT GENERATION DRIERS IN ALKYD-BASED SYSTEM : Iron as an alternate for curing of high solid alkyd - Ferrocene and its derivatives - Thiolene chemistry used for drying enhancement of alkyd paints - Thiol-ene curing by visible light photoinitiator - Oxovanadium (IV) compounds - Allyl molybdenum complex [n3-C3h5(n5-C5H5)Mo(CO2] - FIGURES : 1. Schematic representation of auto-oxidative type of mechanism - Autoxidation in presence of cobalt drier - 3. Detailed and shifted FTIR spectra of HS alkyd coatings with Co drier (PCo2) vs time - 4. Detailed and shifted FTIR spectra of HS alkyd coatings with Fe drier (PFe2) vs time - 5. Time-depedent concentrations of cis-C=C-H for HS alkyd coatings with Co drier - 6. Relative reaction rate of HS alkyd coatings depending on the wt% of drier content added in resin solid - 7. NYquist plot of EIS measurements and used equivalent circuit model for HS alkyd coatings with different Co and Fe drier concentrations - 8. Product between Warburg coefficient and film thickness for cured HS alkyd coatings with different Co and Fe drier concentrations - 9. Pore resistance for cured HS alkyd coatings with different Co and Fe drier concentrations - 10. Schematic representation of the ascorbic acid and its lipophilic derivatives used in combination with iron as drier - 10. Pseudo-first-order plots for the disappearance of EL with time. Results for mixtures of the cobalt drier and ferrocene derivatives with electron releasing substituents - 11. Chemical structure of studied driers - 12. Schematic depiction of the reaction of four functional thiol resin with an alkyd resulting in a highly functional alkyd resin which can polymerize further by oxidative type of drying - 13. Chemical structure of studied drier - 14. Chemical structure of studied drier En ligne : https://drive.google.com/file/d/1VfiBCVjXtiSLlw_vIpnugpFQN7MQ3B6E/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30691 [article]

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Inorganic extenders - Part 2 / Ankush Trivedi in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 63-72 Titre : Inorganic extenders - Part 2 Type de document : texte imprimé Auteurs : Ankush Trivedi, Auteur ; Akanksha Trivedi, Auteur ; P. K. Kamani, Auteur Année de publication : 2018 Article en page(s) : p. 63-72 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés inorganiques Concentration pigmentaire volumique critique Dureté (matériaux) Extendeurs Extendeurs -- Propriétés chimiques Réfraction, Indice de Index. décimale : 667.9 Revêtements et enduits Résumé : Extender pigments are much lower in price than prime pigments and are used in paints primarily to reduce cost. However, by careful selection of the particular type of extender for specific paints it is often possible to improve certain properties of the paint or the dry coating. Proper choice of extender may improve properties such as consistency, leveling, and pigment settling in the paint. Certain extenders reinforce the structure of dry coating mechanically, while others increase its resistance to the transmission of moisture.ln paints with high pigment concentration sufficient hiding may be obtained by replacing sonne of the opaque pigments with extender pigment. Detailed knowledge of the various types and grades of extenders will enable the paint formulator to produce paints having maximum properties at minimum cost.Numerous properties of extenders are discussed here along with their suitable end applications. Note de contenu : - Hardness - Chemical effects - Refractive index - Engineering aspects - fill and CPVC En ligne : https://drive.google.com/file/d/1AnYqSQq8DT2Fyw6Bdmk2KAdXVGAoDKC8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30692 [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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• Copper phthalocyanine alpha blue (15.0, 15.1 and 15.2) / Tipanna Melkeri in PAINTINDIA, Vol. LXVIII, N° 4 (04/2018)

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Formulation principles of exterior emulsion paints / M. Veeramani in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 86-88 Titre : Formulation principles of exterior emulsion paints Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2018 Article en page(s) : p. 86-88 Langues : Anglais (eng) Catégories : Applications extérieures Formulation (Génie chimique) Pigments Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.6 Peintures Résumé : So far we have covered the formulating principles of interior emulsion paints. Now let us turn our attention to exterior emulsion paints. The formulations of exterior paints differ from interior one as the former had to take on and withstand the beating of weather conditions in addition to exhibiting of non-fading characteristics. We all know that, Paint typically contains four essential ingredients, namely pigment, binder, liquid and additives. Any or all of these ingredients may be a single component or may comprise multiple items. Pigment provides colour to paint and also makes paint opaque, and pigment is usually of mineral or organic origin although some pigments are artificially produced. Some pigments possess Iittle or no bulk and must be fixed on a more solid, but at the same time transparent, substance or base. "Prime" pigments provide colour and opacity (opaque coverage). The most common prime pigment is titanium dioxide, which is white and is used in latex and water-based paints. Traditionally, pigments have also added hiding properties to paint. Specialty or extender pigments may also be used and provide bulk to the paint at a low cost. The extender pigments are often chosen for their impact on properties like scrub resistance, stain resistance and chalk resistance. China Clay is frequently used for this purpose. These pigments are added to the paint to provide certain characteristics such as thickness, a certain level of gloss and durability. They are usually naturally occurring products which originally were in the earth and were mined and purified for use in paint. Such pigments as calcium carbonate, talc and clay are, for example, used extensively in paints. Note de contenu : A. Typical formulation : white En ligne : https://drive.google.com/file/d/11mVlWHb_YPf7GXZBXNIFpFg93bsWrHDG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30694 [article]

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Commonly used synonyms in pigments / Mukund Hulyalkar in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 90 Titre : Commonly used synonyms in pigments Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2018 Article en page(s) : p. 90 Langues : Anglais (eng) Catégories : Pigments Synonymes Index. décimale : 667.2 Colorants et pigments En ligne : https://drive.google.com/file/d/130y52qS1Dz5HceFTRJa6N6i52Wh-J0rd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30695 [article]

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Thermo plastic acrylics resins / Mukund Hulyalkar in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 92-94 Titre : Thermo plastic acrylics resins : Aerosol spray coatings popularly known as touch-up paints Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2018 Article en page(s) : p. 92-94 Note générale : Errata : read as TPA in last issue instead of TSA Langues : Anglais (eng) Catégories : Formulation (Génie chimique) Paramètres de solubilité Peintures aérosols Polyacryliques Revêtement en phase solvant:Peinture en phase solvant Thermoplastiques Une matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire. Index. décimale : 667.9 Revêtements et enduits Résumé : They are mainly used in machine tool industry, where powder coated or liquid painted machines are exported or delivered to actual users in India. Inspite of taking utmost precautions small damages takes place. To overcome these damages, best thing to do is spray with the help of Ready to Use Aerosol Paints. These paints will replace brushing, use of compressors, thinners and expensive skilled spray painters. These Aerosol Paints are readily available in all popular Industrial (RAL) and Automotive shades. Nowadays zinc aluminum protective sprays are also available, these are based on Alkyl Silicon modified resin. For mailing silica is used in powder form instead of fumed one. TPA and NC cotton combination paints are also used. Note de contenu : - TPA paint general formula for solid color - Figures : Touch-up being done on an dented car with the help of aerosol paints En ligne : https://drive.google.com/file/d/15KM-dbPKAyh3Vo0lDhGzQ19Wp8VqX3pp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30696 [article]

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Application of electrochemical polarization technique for the development of phosphating formulation used for the pretreatment of mild steel / Himansu Talukdar in PAINTINDIA, Vol. LXVIII, N° 3 (03/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 3 (03/2018) . - p. 112-118 Titre : Application of electrochemical polarization technique for the development of phosphating formulation used for the pretreatment of mild steel Type de document : texte imprimé Auteurs : Himansu Talukdar, Auteur ; Abhishek Ghosh, Auteur Année de publication : 2018 Article en page(s) : p. 112-118 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Electrochimie Formulation (Génie chimique) Métaux -- Revêtements protecteurs Phosphatation Polarisation (électricité) Revêtement de surface Index. décimale : 667.9 Revêtements et enduits Résumé : The development of phosphating chemical for the pretreatment of mild steel is largely guided by the performance in salt spray experiment. This, however, requires a long time to finalise the most effective formulation. The application of electrochemical techniques are becoming popular tool for evaluating surface coating in coating industry. In this article we have attempted a simple galvanostatic polarization technique to find out the best workable phosphating chemical composition for the pretreatment of mild steel before painting. Note de contenu : - Table 1 : Experimental data for polarization of bare MS in 3.5% sodium chloride solution - Table 2 : Experimental data for polarization of (Al) in 3.5% sodium chloride solution - Table 3 : Experimental data for polarization of (B) in 3.5% sodium chloride solution - Table 4 : Experimental data for polarization of (C) in 3.5% sldium chloride solution - Table 5 : Experimental data for polzrization of (D) in 3.5% sodium chloride solution - Fig. 1 : Galvanostatic polarization of Bare MS in 3.5% NaCl solution for estimation of jcorr and Ecorr - Fig. 2 : Galvanostatic polarization of iron phosphated (A) MS in 3.5% NaCl solution for estimation of jcorr and Ecorr - Fig. 3 : Galvanostatic polarization of zinc phosphated MS in 3.5% NaCl solution for estimation of jcorr and Ecorr - Fig. 4 : Galvanostatic polarization of calcium modified zinc phosphated MS in 3.5% NaCl solution for estimation of jcorr and Ecorr - Fig. 5 : Galvanostatic polarization of zinc, manganese and nickel phosphated MS in 3.5% NaCl solution for estimation of jcorr and Ecorr - Fig. 6 : Iron phosphate panel (A) passes upto 192 hours - Fig. 7 : Zinc phosphate panel (B) in 500 hours (rust creepage = <3.0 mm) - Fig. 8 : Ca mod. Zn phosphate panel (C) in 500 hours (Rust creepage = >2.0 mm - Fig. 9 : Tri-cationic phosphate panel (C) in 500 hours (Rust creepage = >0.5 mm En ligne : https://drive.google.com/file/d/1xTmLYVupGMFZ-GSGR1ARONbMJpu983hp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30697 [article]

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