Aliphatic isocyanate based polyurethane coatings for long term exterior durability / Mukesh Kumar Madhup in PAINTINDIA, Vol. LIXV, N° 12 (12/2014)  

[article]  inPAINTINDIA > Vol. LIXV, N° 12 (12/2014) . - p. 59-62 Titre : Aliphatic isocyanate based polyurethane coatings for long term exterior durability Type de document : texte imprimé Auteurs : Mukesh Kumar Madhup, Auteur ; Amol R. Bakre, Auteur Année de publication : 2014 Article en page(s) : p. 59-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés aliphatiques Durée de vie (Ingénierie) Isocyanates Polyuréthanes Index. décimale : 667.9 Revêtements et enduits Résumé : For heavy duty corrosion protection of structures in classes C3 to C5-A4 environment, polyurethane systems are time tested products for thin layer top coats. They are lightfast, weather resistant and resistant to pollutants etc. However for superior durability of the coatings, correct formulations and ingredients selections are equally important. Urethanes are the reaction products of isocyanates with materials that have hydroxyl groups. They contain a significant number of urethane groups regardless of what the test of the molecule may be. The modem industrial development of urethane polymers started from the pioneer work of Professor Otto Bayer in Germany in 1937. The current article explains die exterior durability of aliphatic isocyanate based polyurethane coating. The gloss retention, color stability and other important aspects have been explained in details. Note de contenu : - TYPE OF POLYURETHANE COATINGS - CHEMISTRY : Aliphatic and aromatic isocyanate based 2K polyurethane coatings - RESULTS AND DISCUSSION : Gloss - Blister, crack, chalking and visual color - Color retention of the coating En ligne : https://drive.google.com/file/d/1xNzCYKb3yv5TA2n-zOGmaPyYFzQfEE0l/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23484 [article]

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Automotive clear coating : A comprehensive look at substrates, testing standards and features / Mukesh Kumar Madhup in PAINTINDIA, Vol. LXXXIII, N° 11 (11/2023)  

[article]  inPAINTINDIA > Vol. LXXXIII, N° 11 (11/2023) . - p. 88-92 Titre : Automotive clear coating : A comprehensive look at substrates, testing standards and features Type de document : texte imprimé Auteurs : Mukesh Kumar Madhup, Auteur Année de publication : 2023 Article en page(s) : p. 88-92 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements Automobiles -- Vernis Essais accélérés (technologie) Essais de résilience Vernis -- Normes Index. décimale : 667.9 Revêtements et enduits Résumé : In the ever-evolving realm of automotive technology, the demand for advanced coatings that ensure durability, aesthetics, and safety is paramount. Auto components, whether metallic or non-metallic, require coatings that not only adhere effectively but also withstand the rigors of everyday use and challenging environmental conditions. One of the primary challenges lies in coating plastic parts, notorious for their low surface energy, making adhesion difficult. This necessitates extensive research to achieve enduring adhesion on plastic surfaces. Coating materials destined for OEM applications undergo rigorous, long-term performance tests, which include crucial evaluations such as cyclic corrosion resistance (ASTM B117), abrasion resistance (ASTM D4060), cross-hatch adhesion (ASTM D3359), and cyclic humidity resistance (ASTM D2247). Note de contenu : - COMMON SUBSTRATES IN AUTOMOTIVE COATINGS : 1. ABS (Acrylonitrile Butadiene Styrene - 2. Polycarbonate (PC) - 3. Nylon (Polyamide - PA) - 4. Metals - PERFORMANCE TESTING STANDARDS : Cyclic corrosion resistance (ASTM B117 - Abrasion resistance (ASTM D4060) - Cross-hatch adhesion (ASTM D 3359) - Cyclic humidity resistance (ASTM D2247) - FEATURES AND PERFORMANCE OF AUTOMOTIVE CLEAR COAT : 1. Optical clarity - 2. UV protection - 3. Scratch resistance - 4. Chemical resistance - 5. Easy maintenance - 6. Longevity - 7. Enhanced depth and shine En ligne : https://drive.google.com/file/d/1WACdDp57x-BF2TJskGfPZ3ZKn9EeC08R/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40730 [article]

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Evaluation and characterization of epoxy phenolic novolac (EPN) resin with commercially available amines and amides / Mukesh Kumar Madhup in PAINTINDIA, Vol. LXII, N° 11 (11/2012)

[article]  inPAINTINDIA > Vol. LXII, N° 11 (11/2012) . - p. 75-82 Titre : Evaluation and characterization of epoxy phenolic novolac (EPN) resin with commercially available amines and amides Type de document : texte imprimé Auteurs : Mukesh Kumar Madhup, Auteur ; Pankaj M. Wandre, Auteur Année de publication : 2012 Article en page(s) : p. 75-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Epoxy phénol novolac 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. Polyamines Réticulants Réticulation (polymérisation) Index. décimale : 667.9 Revêtements et enduits Résumé : Different types of epoxy resins and curatives are available commercially, a study was made to evaluate performance properties of commercially available "epoxy phenolic Novolac-EPN" base epoxy resin curing with different amines and amides available and the trend of properties were captured based on experiments done at different stoichiometry of the curative. This paper represents briefly the introduction of chemistry of epoxy and amine/amide under study followed by the introduction of general tests done for epoxy or similar coating system. Result and discussion section has detailed experimental data and short term performance properties of the experimental film. Note de contenu : - INTRODUCTION : Epoxy resins - Diglycidyl ether of bisphenol-A (DGEBA) - Novolac epoxy resins - Structure of epoxy phenolic novolac resin - EXPERIMENTAL : RAW MATERIAL USED FOR CURRENT WORK AND ITS CHEMISTRY : Eoxy resin - Curing agents - Curing chemistry - EXPERIMENTAL : Materials - Test specimen preparation - Characterization of samples - RESULTS AND DISCUSSION : Gel time - dry time - Adhesion - Impact resistance - Flexibility - Cathodic disbondment - Salt spray - Differential scanning calorimetric (DSC analysis) - Chemical resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17158 [article]

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Functional & specialty coatings for enhanced end use performance / Mukesh Kumar Madhup in PAINTINDIA, Vol. LXIX, N° 11 (11/2019)  

[article]  inPAINTINDIA > Vol. LXIX, N° 11 (11/2019) . - p. 88-98 Titre : Functional & specialty coatings for enhanced end use performance Type de document : texte imprimé Auteurs : Mukesh Kumar Madhup, Auteur Année de publication : 2019 Article en page(s) : p. 88-98 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. Adhésion Anticorrosifs Anticorrosion Epoxydes Essais de brouillard salin Hydrophobie Matériaux -- Propriétés fonctionnelles Polyuréthanes Résistance à l'abrasion Revêtement antireflet Revêtements anti-graffitis Revêtements bi-composant Revêtements organiques Revêtements protecteurs Surfaces -- Nettoyage Index. décimale : 667.9 Revêtements et enduits Résumé : The coating materials which provide specific performance outcomes are called functional and specialty coatings. Application of functional coatings are becoming increasingly popular with the technology progress in material science field and continuous research in specialty coating segment. By using right functional/specialty coating, it is possible to achieve specific coating propergies like anti-corrosion, anti-corrosion, anti-erosion, anti-wear and chemical resistance, infra-red rejection, enhanced light transmission, electrical dissipation etc. Applications of these coatings are carried out over variety of substrates including but aluminum, glass etc. to deliver the special properties for which it is designed. Note de contenu : - INTRODUCTION : Anticorrosive coatings - Specimen preparation - Antireflection coating - Principle of AR coating - Specimen preparation for testing antireflection property - Antigraffiti coating with hydrophobic property - Specimen preparation for testing antigraffiti property - Fig. 1 : Representation of an electrochemical cell which causes anode to degrade in presence of electrolyte - Fig. 2 : Metallic corrosion in environment in presence of water/moisture and formation of electrochemical cell - Fig. 3 : 3M scotchkote anticorrosion coating after 50000 Hrs. in salt spray as per ASTM B-117 - Fig. 4 : Principle of reflection and enhancement of reflection of light using nanocoating - Fig. 5 : Comparative %T (gain) of wavelength between 300-1200 nm for coated and uncoated glass. Increase of 2.5~3.0% light tranmission (single side coated glass) - Fig. 6 : Figure depicting schematic representation of surface morphology for repellency of dirt and easy to clean property - Fig. 7 : Determination of graffiti resistance by D6578/D6578M - 13 - Fig. 8 : Antigraffiti coating having hydrophobic property applied over coated and uncoated glass substrate - Fig. 9 : 60 days exposed glass panels and water washed with same force - Fig. 10 : Adhesion of the coating over, direct on FRP, PU coaing and mild steel (emery cleaned) - Fig. 11 : Hot water soak adhesion tested specimens for 38 days at 95°C - Fig. 12 : Comparative study of advanced abrasion resistance epoxy coating (AREC) versus conventional 2K liquid epoxy coating for abrasion resistance testing as per ASTM D4060 - Table 1 : Various test properties of advanced anticorrosion 2 pack epoxy coating En ligne : https://drive.google.com/file/d/1DtlhhQ7xuv3X2QA-DdsnZT0xoZZSImqx/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33636 [article]

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How environmental regulations steered technological changes in coating industry / Mukesh Kumar Madhup in PAINTINDIA, Vol. LXVII, N° 1 (01/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 1 (01/2017) . - p. 58-61 Titre : How environmental regulations steered technological changes in coating industry Type de document : texte imprimé Auteurs : Mukesh Kumar Madhup, Auteur ; Amol R. Bakre, Auteur Année de publication : 2017 Article en page(s) : p. 58-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Peinture -- Législation Produits chimiques -- Suppression ou remplacement Revêtements (produits chimiques):Peinture (produits chimiques) Revêtements -- Industrie -- Aspect de l'environnement:Peinture -- Industrie -- Aspect de l'environnement Index. décimale : 667.9 Revêtements et enduits Résumé : Environmental regulations are being enforced increasingly as pollutions are increasing day by day. Impact of human's activities on environment and industrialization etc. are creating hazards on human being, environment and on wild life. In global perspective regulatory bodies, environmentalists and social workers are increasingly advocating requirements to reduce and/or eliminate the use of materials having potential negative impact on the environment or on human health. Though in India regulations are still long way to go in the coating industry, the technological changes are being experienced after the regulations are being enforced and compliance are required. The technological changes in recent past have positively contributed to a sustainable green environment. In this article, we have analyzed the chronological changes in the regulations related to coating industry and its impact on technological changes, innovation and alternative options from applications and formulation perspective. Note de contenu : - Coating composition and Hazard - Regulatory expectations and its impact on paint industry - Technological changes in the latter half of 20th century - Effect of environmental regulations on VOC control - Role of regulation in innovation - The 3rd Alternate - Effect of regulations on innovation En ligne : https://drive.google.com/file/d/17o_HbhIT0fopENwp7u1nC9K0ccaOcg1v/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28028 [article]

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Investigation of glass transition temperature (Tg) of bisphenol A based epoxy resin and cyclo-aliphatic amine system with variation of stoichiometry / Mukesh Kumar Madhup in PAINTINDIA, Vol. LXIII, N° 1 (01/2013)

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Solvent free liquid epoxy coatings technology / Mukesh Kumar Madhup in PAINTINDIA, Vol. LXV, N° 12 (12/2015)  

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