Concept of non-volatile by weight & volume (NVM & NVVT), VOC in coatings formulation and application / Durgesh Soni in PAINTINDIA, Vol. LXXXIII, N° 12 (12/2023)  

[article]  inPAINTINDIA > Vol. LXXXIII, N° 12 (12/2023) . - p. 63-69 Titre : Concept of non-volatile by weight & volume (NVM & NVVT), VOC in coatings formulation and application Type de document : texte imprimé Auteurs : Durgesh Soni, Auteur ; Arun Maithani, Auteur ; Ashok Dighe, Auteur Année de publication : 2023 Article en page(s) : p. 63-69 Langues : Anglais (eng) Catégories : Calcul Composés organiques volatils Copolymère mélamine-formaldéhyde Epoxydes Formulation (Génie chimique) Isocyanates Phosphate de zinc Polyalkydes Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Réticulants Index. décimale : 667.9 Revêtements et enduits Résumé : All raw materials of paint & coatings mostly are purchased on kilogram basis and sold on liter basis for that purpose weight per liter at applicable viscosity is an important parameter owing its allegiance to the active matter in Paint (recipe of 100 kg), this active matter is combined weight of Pigment & Resin. Solid referred as NVM (Non-volatile by mass/weight). NVVT (Non volatile by volume) in the Ltr of Paint is Volume (combined) of Pigment & Resin. This is accountable for build/thickness of paint referred as Dry Film Thickness (DFT). Note de contenu : - Volatile Organic Compound (VOC) : Formulae of alkyd - Formulation highlights - Example : What will be the amount polyamide of amine value 230 required for 100 grams of epoxy resin of EEW = 450 ? - Standard epoxy - Hardener solution - Formulation highlights - Formulation of hardener solution - High build zinc phosphate paint - Calculation of hardner - Hardner solution - Formulation highlights - Aliphatic isocyanate - Formulation highlights - Plasticizing alkyd and melamine formaldehyde resin at elevated temperature (120°C/30 min) - Formulation highlights En ligne : https://drive.google.com/file/d/1mI3ZcydbcqmIclv9AXPMemnvLaX-uefN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40741 [article]

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Cool glove leathers made using thermoresponsive syntans / A. Jaya Prakash in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 12 (12/2014)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 12 (12/2014) . - p. 411-417 Titre : Cool glove leathers made using thermoresponsive syntans Type de document : texte imprimé Auteurs : A. Jaya Prakash, Auteur ; M. Ragul, Auteur ; Jonnalagadda Raghava Rao, Auteur ; N. N. Fathima, Auteur Année de publication : 2014 Article en page(s) : p. 411-417 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Copolymère mélamine-formaldéhyde Encapsulation Gants Matériaux thermosensibles Syntans Transition de phase En physique, une transition de phase est une transformation du système étudié provoquée par la variation d'un paramètre extérieur particulier (température, champ magnétique...). Cette transition a lieu lorsque le paramètre atteint une valeur seuil (plancher ou plafond selon le sens de variation). La transformation est un changement des propriétés du système. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Protection is the main function of gloves; also comfort of the wearer has to be kept in mind while making gloves without compromising on strength and flexibility. Body dissipates heat in the form of sweat; sweating through hands is likely to be more while using gloves in relatively hot weather conditions resulting in discomfort and slipperiness. In order to overcome these problems there is a need for development of materials, which can respond to temperature changes providing comfort and protection. In our current study, Phase Changing Material (PCM) was encapsulated in condensate polymers of melamine formaldehyde for preparation of thermoresponsive syntan. The syntan was characterised using different techniques such as Differential Scanning Calorimetry (DSC), Thermo Gravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM). Glove leathers made using this syntan were termed “Cool glove leathers” as they showed thermoresponsive behaviour, which exhibited a temperature difference of 1.5±0.5°C to that of control leather samples with 0.5±0.4°C. The cool glove leathers were tested for various properties like strength, organoleptic and thermoresponsive function. Note de contenu : - EXPERIMENTAL SECTION : Reagents - Synthesis of PCM microencapsulated melamine-formaldehyde syntan - Characterization of thermoresponsive syntan and leather - RESULTS AND DISCUSSION : Characterization of PCM based syntan - Characterization of cool glove leathers - Thermo responsive function analysis - Physical strength and organoleptic properties of leathers En ligne : https://drive.google.com/file/d/1VJhUyzON_eUquxOnyVno4yYI5qHeNPUr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22498 [article]

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Crosslinking vs. interdiffusion rates in melamine-formaldehyde cured latex coatings : a model for waterborne automotive basecoat / Mitchell A. Winnik in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 892 (05/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 892 (05/1999) . - p. 47-60 Titre : Crosslinking vs. interdiffusion rates in melamine-formaldehyde cured latex coatings : a model for waterborne automotive basecoat Type de document : texte imprimé Auteurs : Mitchell A. Winnik, Auteur ; Patrick Pinenq, Auteur ; Christian Krüger, Auteur ; Jianxin Zhang, Auteur ; Phillip V. Yaneff, Auteur Année de publication : 1999 Article en page(s) : p. 47-60 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Copolymère mélamine-formaldéhyde Polyacrylates Réticulation (polymérisation) Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Designing optimal formulations for automotive waterborne basecoats can be fairly complex, often requiring knowledge of events that occur at the molecular level. The ultimate performatce of the coating can depend upon the success with which this knowledge is applied. We examine a system in which an aqueous dispersion of an acrylic latex with -OH functionality reacts with a melamine derivative when heated. We use fluorescence-labeling and energy transfer measurements to obtain information on the relative rates of crosslinking and interparticle polymer diffusion in these films. We show that temperature and particle morphology play an important role in the development of film properties. Finally, these energy transfer experiments provide information on the location of the melamine-formaldehyde resin in the dry film before the onset of crosslinking. This system can serve as a model for waterborne basecoat development in many automotive applications. Note de contenu : - EXPERIMENTAL : Materials - Latex characterization - Film formation, annealing, and fluorescence measurements - FLUORESCENCE DATA AND DATA ANALYSIS - RESULTS AND DISCUSSION : Latex preparation and characterization - Where is the melamine located ? - Crosslinking, gel content, and swell ratio - Polymer interdiffusion - Core-Shell latex films Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17853 [article]

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Deciphering the role of individual retanning agents on physical properties of leathers / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 3 (03/2019) . - p. 94-102 Titre : Deciphering the role of individual retanning agents on physical properties of leathers Type de document : texte imprimé Auteurs : Murali Sathish, Auteur ; Bhuvana Subramanian, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Nishad Fathima Nishter, Auteur Année de publication : 2019 Article en page(s) : p. 94-102 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage Biopolymères Copolymère mélamine-formaldéhyde Cuirs et peaux -- Propriétés physiques Phénoplastes Polyacryliques Retannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In post-tanning different types of retanning agents are used in combination to improve the functional properties of leather and therefore understanding the individual effect of each retanning agents on final properties is difficult. This work mainly focuses toward quantifying the individual effect of different weight percentages (4, 8 and 16%) of phenol-formaldehyde resin (PFR), melamine-formaldehyde resin (MFR), acrylic resin (AR) and biopolymers (BP) on physical properties of leather. It was found that the strength characteristics are greatly affected when the retanning agents offer increased above 8% where the effect of phenol-formaldehyde resin is higher than other re-tanning agents. Melamine-formaldehyde resin and biopolymer is predominantly affecting the belly region. It has also been observed that the phenol-formaldehyde resin improves the fullness whereas grain tightness and flatness are improved with increasing the percentages of melamine-formaldehyde resin offer. Biopolymer improves the grain smoothness and the ability of improving the roundness of leather is similar for all kind of retanning agents. A meaningful conclusion could not be drawn in the porosity results obtained due to the heterogeneous nature of leather matrix. Thus, a conventional triplicate method of measurement as done in this study would not suffice to provide a conclusive interpretation of results obtained using capillary flow porometry technique. Note de contenu : - EXPERIMENTAL METHODOLOGY : Analysis of physical strength characteristics - Analysis of porosity - RESULTS AND DISCUSSIONS : effect of phenol-formaldehyde resin (PFR) on physical strength characteristics - Effect of melamine-formaldehyde resin (MFR) on physical strength characteristics - Effect of acrylic resin (AR) on physical strength characteristics - Effect of protein based biopolymer (BP) on physical strength characteristics - Effect of re-tanning agents on porosity - Effect of re-tanning agents on organoleptic properties En ligne : https://drive.google.com/file/d/1c7oRcD0zU0flHM8vo0i4mnnKr3Fp2TDF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31930 [article]

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Development of ultra low bake stoving monocoat for industrial OEM application / Sulav Seth in PAINTINDIA, Vol. LXXXIII, N° 11 (11/2023)  

[article]  inPAINTINDIA > Vol. LXXXIII, N° 11 (11/2023) . - p. 54-68 Titre : Development of ultra low bake stoving monocoat for industrial OEM application Type de document : texte imprimé Auteurs : Sulav Seth, Auteur Année de publication : 2023 Article en page(s) : p. 54-68 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Bilan des émissions de gaz à effets de serre Catalyse Composés organiques volatils Copolymère mélamine-formaldéhyde Dépôt électrolytique Haut extrait sec Matériaux -- Cuisson Polyacryliques Polyesters Réticulants Revêtement monocouche Thermodurcissables Index. décimale : 667.9 Revêtements et enduits Résumé : Three eco-friendly solutions are prominent in coating industry especially in the field of Automotive coating. In Indian context, water based coatings are not feasible for its cost & other operational issues, thus it is limited to CED application only. High solid coatings are the next alternate & it is gaining popularly for reduced VOC emission without compromising the physical & chemical properties of the coatings. Simultaneously all OEM manufacturers are seeking solutions for low bake coatings to restrict energy consumption in the curing process which will reduce carbon footprint in the whole supplychain. When we talk about low bake coatings, reactivity & catalysis plays pivotal role in achieving results. Developing a low bake top coat has many challenges. Increased reactivity of the resin system often contributes to uncontrolled & incomplete reaction which is responsible for poor physical, chemical & weathering properties. Use of excess catalyst also has an impact on Electrical Resistivity (ER) which is a very important application parameter for electrostatic spray application. Combination of catalysis & reactivity negatively impacts storage stability. Judicious selection of catalyst, its dose optimization, right combination of crosslinker resin, Base to crosslinker ratio is very important to get desired results. In the current research paper we will explore various aspects of low bake formulation ingredients & their effect on coating performance to develop a low bake glossy monocoat white which meets the performance requirements of commercial vehicle manufacturers. Note de contenu : - Technology feasibility in Indian market - Material selection & development strategy : Thermosetting acrylic resin - Thermosetting polyester resin - Melamine formaldehyde resin - Type 1 MF resin - Type 2 MF resin - Type 3 MF resin - Low bake catalysts - Paint preparation, application & property assessment : Paint preparation - Test panel preparation - Property assessment - Instruments for critical paint property assessment - Experiments, results & discussion : Design of experiments - Paint parameters & flow of experiments - Table 1 : Technology feasibility chart - Table 2 : Standard specification of monocoat stoving glossy white top coat - Table 3 : Design of experiments - Fig. 1 : Cross linking reaction of acrylic & MF resin - Fig. 2 : Methylolation reaction of melamine - Fig. 3 : Condensation& polymerization of ethylol amines - Fig. 4 : Imino type MF resin - Fig. 5 : HMMM type MF resin - Fig. 6 : Etherified polymeric Mf resin - Fig. 7 : Relative strength of acid catalyst - Fig. 8 : Baking window of ultra low bake mono coat white En ligne : https://drive.google.com/file/d/1H4Xo4dpQD7p_RRc7xWktM0bfln7lR4cz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40727 [article]

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Factors influencing the interlayer adhesion in the CED primer/waterborne coating system / Natalia Vlasova in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4654 (09/2019)  

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Highly functional biobased polyols and their use in melamine–formaldehyde coatings / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)  

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Influence of PEPA-containing polyether structure on fire protection of transparent fire-resistant coatings / Yanchao Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 3 (05/2016)  

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Migration of reactable UVAs and HALS in automotive plastic coatings / Philip V. Yannef in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 3 (07/2004)  

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A novel chromium-free tanning process based on in-situ melamine-formaldehyde oligomer condensate / Xue Bai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 11 (11/2013)  

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Particle size evolution of melamin-formaldehyde tanning agent on tanning effect / Mengmeng Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 5 (05/2018)  

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Plastiques. Pièces moulées à base de résine mélamine-formaldéhyde. Détermination du formaldéhyde extractible - Norme NF EN ISO 4614 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1999)

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Plastiques. Poudres à mouler à base de mélamine-formaldéhyde (MF-PMC). Partie 1 : Système de désignation et base de spécification - Norme NF EN ISO 14528-1 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)

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Plastiques. Poudres à mouler à base de mélamine-formaldéhyde (MF-PMC). Partie 2 : Préparation des éprouvettes et détermination des propriétés - Norme NF EN ISO 14528-2 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)

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Plastiques. Poudres à mouler à base de mélamine-formaldéhyde (MF-PMC). Partie 3 : Exigences relatives à certaines poudres à mouler - Norme NF EN ISO 14528-3 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)

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Plastiques. Poudres à mouler à base d'urée-formaldéhyde et d'urée/mélamine-formaldéhyde (UF- et UF/MF-PMC). Partie 1 : Système de désignation et base de spécification - Norme NF EN ISO 145527-1 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)

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Plastiques. Poudres à mouler à base d'urée-formaldéhyde et d'urée/mélamine-formaldéhyde (UF- et UF/MF-PMC). Partie 2 : Préparation des éprouvettes et détermination des propriétés - Norme NF EN ISO 14527-2 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)

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Plastiques. Poudres à mouler à base d'urée-formaldéhyde et d'urée/mélamine-formaldéhyde (UF- et UF/MF-PMC). Partie 3 : Exigences relatives à certaines poudres à mouler - Norme NF EN ISO 14527-3 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)

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Powder coating benefits / Elizabeth Reck in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4477 (06/2004)

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Preparation of melamine-formaldehyde encapsulated fluorescent dye dispersion and its application to cotton fabric printing / Anran Hu in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)  

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