High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil) / Pawan D. Meshram in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 331-338 Titre : High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil) Type de document : texte imprimé Auteurs : Pawan D. Meshram, Auteur ; Ravindra G. Puri, Auteur ; Amol L. Patil, Auteur ; Vikas V. Gite, Auteur Année de publication : 2013 Article en page(s) : p. 331-338 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Huile de coton Polyéther bloc amide Polyéther uréthane Revêtements:Peinture Tags : 'Revêtement  haute  performance'  'Polyéther-urethane  amide'  'Ressource  renouvelable'  'Huile  végétale'  Huile  coton'  Polyaddition  'Propriétés  mécaniques'  chimiques'  'Résistance  impact'  rayure'  Flexibilité  chimique' Index. décimale : 667.9 Revêtements et enduits Résumé : In this investigation, polyetheramide resin was prepared through the condensation polymerization of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) with bisphenol-A. It was further modified by 2,4-toluene diisocyanate (TDI) in 10–30 wt% of polyetheramide to develop a series of moisture curing urethane-modified polyetheramide resins (UMCOPEtA). The synthesized resin was characterized using 1H NMR, 13C NMR, FTIR and solubility in various organic solvents at room temperature. The thermal and curing behavior of the resin was investigated using thermogravimetric analysis and differential scanning calorimetric techniques. The physico-chemical properties such as hydroxyl value, iodine value, specific gravity and mechanical properties like scratch hardness, impact, and flexibility were determined by standard laboratory methods. Coatings of UMCOPEtA resin were prepared on mild steel panels to evaluate chemical resistance performance against acid, alkali, water and xylene. The newly developed UMCOPEtA coatings showed improved hardness, impact, gloss, water and chemical resistance when compared with unmodified polyetheramide coatings, and thus were found to be suitable as a high performance coating material. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) - Synthesis of cottonseed oil polyeteramid (COPEtA) - Synthesis of urethane-modified polyétheramide (UMCOPEtA) - Preparation and testing of coatings - Characterization - RESULTS AND DISCUSSION : FTIR spectral analysis - NMR spectral analysis - Physico-chemical characterization - Coating properties - Thermal analysis DOI : 10.1007/s11998-012-9449-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9449-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18732 [article]

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Polyaspartics : an overview / Ravindra G. Puri in PAINTINDIA, Vol. LXI, N° 2 (02/2011)

[article]  inPAINTINDIA > Vol. LXI, N° 2 (02/2011) . - p. 51-55 Titre : Polyaspartics : an overview Type de document : texte imprimé Auteurs : Ravindra G. Puri, Auteur ; Pawan D. Meshram, Auteur Année de publication : 2011 Article en page(s) : p. 51-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Isocyanates Polyaspartiques Réactivité (chimie) Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Polyaspartics is the recent development in aliphatic polyurea/polyrethane coating. In conventional two component polyurethane coating the longer dry time and in case of polyurea shorter pot life restricts their use in coatings. Polyaspartic coating technology can be used to formulate a relatively fast drying two component coating which offers several advantages over conventional coatings including good outdoor stability, extended pot life and faster recoat windows leading to faster coating application and improved productivity. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11024 [article]

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Recent developments in smart coatings for corrosion protection / Ravindra G. Puri in PAINTINDIA, Vol. LXII, N° 5 (05/2012)

[article]  inPAINTINDIA > Vol. LXII, N° 5 (05/2012) . - p. 55-61 Titre : Recent developments in smart coatings for corrosion protection Type de document : texte imprimé Auteurs : Ravindra G. Puri, Auteur ; Pawan D. Meshram, Auteur ; Rajkumar S. Sirsam, Auteur Année de publication : 2012 Article en page(s) : p. 55-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Conducteurs organiques Corrosion Matériaux intelligents Microcapsules Polyélectrolytes Revêtements Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : ABSTRACT Corrosion is a destructive process that often causes failure in metallic components and structures. The best protective coatings that are most commonly used for corrosion control rely mostly on barrier and inhibitive mechanism. However, progressively stringent environmental regulations have resulted in the ban of many commercially available corrosion protective coatings due to the harmful effects of their solvents or corrosion inhibitors. The present paper focuses on recent developments in multifunctional, smart coating which releases corrosion inhibitor as demanded by coating damage and the presence of a corrosive environment for the autonomous control of corrosion. A new generation of anticorrosive coatings possessing passive matrix functionality and active nanocontainers responds to changes in the local environment has prompted great interest. New materials such as nano-structured materials, microcapsules and intrinsically conducting polymers (ICPs) present opportunities for development of damage-responsive coatings. Note de contenu : - Protective mechanism of anticorrosive coatings - Chromate and galvanic coatings - Intrinsically conducting polymer (ICP) coatings - Coating containing controlled release microcapsules - Coating containing inhibitor-loaded nanocontainers : polyelectrolyte multilayer - Protective biofilms Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15647 [article]

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