Air-drying high solids green coatings / Syed Haseebuddin in PAINTINDIA, Vol. LIX, N° 11 (11/2009)

[article]  inPAINTINDIA > Vol. LIX, N° 11 (11/2009) . - p. 61-76 Titre : Air-drying high solids green coatings Type de document : texte imprimé Auteurs : Syed Haseebuddin, Auteur ; Kumar Ghosh Swapan, Auteur ; Gulzar Waghoo, Auteur ; Randhir Parmar, Auteur ; Vaibhav Dave, Auteur ; Harshal Navghare, Auteur Année de publication : 2009 Article en page(s) : p. 61-76 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Résines  alkyd  Polymères  branches  vertes  Enduits  verts  Dipentaerythritol  Dessication  air  Résistance  corrosion  Brillant  Faibles  COV Index. décimale : 667.9 Revêtements et enduits Résumé : Green coatings have become the core research area ot the scientists to address the issues of the environment health and safety. A series of high solid alkyd polymers from soya and dehydrated castor oil fatty acid (SOFA and DCOFA respectively) combination with varying percentage of Dipentaerythritol (DPE ; a hexa-functional polyol), have been synthesized and characterized for their physico chemical, optical, thermal and mechanical properties. For the study purpose the polymers were prepared at 80 % solids keeping the oil length constant. The curing behaviour of the alkyds was studied using FT-IR and DSC. Increasing DPE content in resin backbone was found to increase gloss and hardness.The gloss improvement was also supported well by AFM pictures. Results of 500 hours of QUV exposure revealed higher gloss retention for DP based systems. When compared for the anticorrosive properties, the EIS spectrum reveals that alkyd film containing 100 % DPE has the higher value of impedance. The overall performance of the DPE based system reveals the excellent combination of green aspects with improved coatings which is the need of the day. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8324 [article]

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Applicability and WLF equation to polyurethane polyols and film properties of their resins / Syed Haseebuddin in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 55-59 Titre : Applicability and WLF equation to polyurethane polyols and film properties of their resins Type de document : texte imprimé Auteurs : Syed Haseebuddin, Auteur ; K. V. S. N. Raju, Auteur ; M. Yaseen, Auteur Année de publication : 1995 Article en page(s) : p. 55-59 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  haute  teneur  solide'  Liant  'Uréthanne  polymère'  Polyol  Préparation  'Propriété  rhéologique'  Viscosité  'Composé  organique  volatil'  Formulation  'Température  transition  vitreuse'  mécanique'  Feuil  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : The need to reduce solvent content of coatings in compliance to air pollution and other Statutory Regulations has led to major efforts to develop high solids coatings. The reduction in molecular weight helps to achieve application viscosity by an increase in free volume. Various polyurethane polyols have been synthesised by reacting the diols with polyisocyanates. The molecular weight and polydispersity indexes of these polyols have been determined by gel permeation chromatography (GPC). The viscosity of 50%. polyol solutions in various solvents has been determined at different temperatures. The temperature dependence on viscosity of solution of these polyols has been determined by the Williams, Landel and Ferry (WLF) equation. The non-linear regression analysis has been solved by using Levenberg Marquardt's algorithm. It is found that non-linear regression analysis gives high correlation coefficients and very low overall residual errors. The variation in the values of constants A and B for each WLF equation in the polyol solution indicates that these constants are system dependent. The values of constants A and B obtained for polyurethane polyols in a particular solvent have been used to calculate the values of glass transition temperature of the oligomer solution (Tg,) at different concentrations. The values of Tg, are found to vary with concentration. As the concentration of polymer increases there is an increase in the Tg, value. The tensile properties and resistance to scratch of resins prepared using these polyols and butylated melamine formaldehyde are better than those of conventional resins. The VOC content of these coating formulations is lower than the value prescribed by the Environmental Protection Agency (EPA). Note de contenu : - Experimental : Viscosity determinations - Equations used for analysing viscosity data - Preparation of coating formulations - Determination of VOC - Results and Discussion : Applicability of WLF equation - Temperature dependency of viscosity - Volatile organic component (VOC) - Properties of the baked coatings of the resin - Tensile properties Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13691 [article]

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Crosslink density and cure window of oligourethane diol/melamine high-solids coatings / M. Yaseen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 879 (04/1998)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 879 (04/1998) . - p. 35-42 Titre : Crosslink density and cure window of oligourethane diol/melamine high-solids coatings Type de document : texte imprimé Auteurs : M. Yaseen, Auteur ; K. V. S. N. Raju, Auteur ; Syed Haseebuddin, Auteur Année de publication : 1998 Article en page(s) : p. 35-42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Formaldéhyde Haut extrait sec Mélamine La mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6. Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde. Oligomères Polyols Polyuréthanes Réticulation (polymérisation) Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : Oligourethane diols were crosslinked with melamine formaldehyde, and their crosslink density was determined by using an equilibrium swelling method. In formulations containing primary or secondary hydroxylated diol the major part of the crosslinker is consumed by trans-etherification reactions and self-condensation. The aromatic nature of TDI imparts rigidity while the aliphatic IPDI results in flexibility of the backbone chain of oligomer. The profile of cure schedules has been determined in the form of a cure window which measures the extent of reaction in terms of crosslink density as a function of bake temperature. The experimentally determined properties like tensile strength and MEK rub-resistance have been taken into consideration for fixing the lower and upper limits of XLD in designing the cure windows of individual coating formulations. The baking schedules of coatings have also been expressed in the form of nominal and true cure windows. Note de contenu : - INTRODUCTION : Crosslinking reactions between polyols and melamine - Crosslink density - Techniques for the determination of crosslink density - Curing aspects of high-solids coatings - Cure window - EXPERIMENTAL : Oligourethane diol - Melamine crosslinker - Coating formulation - Preparation of free film of cured resin - Procedure for the determination of crosslink density - Calculation of crosslink density - Tensile properties - Solvent (MEK) rub resistance - DISCUSSION : Effect of bake temperature and crosslinker content of XLD - Effect of oligourethane diol on crosslink density - Influence of isocyanates used in oligourethane diols - Cure schedules - Baking schedules in terms of cure window - Nominal and true cure window Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17969 [article]

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Environmental-regulatory restrictions, response of paint industry and eco-friendly coating formulations / Syed Haseebuddin in PAINTINDIA, Vol. XLVII, N° 12 (12/1997)

[article]  inPAINTINDIA > Vol. XLVII, N° 12 (12/1997) . - p. 49-58 Titre : Environmental-regulatory restrictions, response of paint industry and eco-friendly coating formulations Type de document : texte imprimé Auteurs : Syed Haseebuddin, Auteur ; M. Yaseen, Auteur Année de publication : 1997 Article en page(s) : p. 49-58 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Industrie  peinture  vernis'  'Composé  organique  volatil'  'Pollution  air'  'Prévention  pollution'  Formulation  Législation  Inde  Asie Index. décimale : 667.9 Revêtements et enduits Résumé : There have been growing restrictions on the use of solvents in organic coating formulations because they decompose or participate in chemical reactions under the influence of sunlight with traces of substances present in the atmosphere and produce photochemical pollutants. The increasing social, environmental pollution and political awareness over the years led to a creation of regulatory bodies. The information about the enactment of Rule 66, Safety Health and Environment, Environmental Protection Agency, OSHA and United Nations Volatile Organic Component-Protocol as well as several other aspects has been reviewed. The problems associated with volatile organic components, the various options to control them, the strategy and the response of the paint industry, the possibilities in eco-friendly coating formulations, their advantages and limitations are described. Note de contenu : - Enactment of rule 66 on the use of organic solvents - Safety, health and environment - Environmental protection agency, EPA - Volatile organic component, VOC - VOC, a cause for ozone generation - Options to control VOCs : VOC exempt solvents or compliant solvents – Photochemical ozone creation potential, POCP – Solvent recovery – Biofiltration - The united nations VOC protocol - VOC in Indian paint industry - Paint industry response - Strategy of paint industry - Eco-friendly possibilities in paint formulation - Water-borne coatings : Polymer micelle in water-reducible coating – Limitations of water-borne coatings - Powder coatings : Shortcomings/limitations of powder coating system - Radiation curable coatings : Limitations of radiation cured coatings - High solids coatings, HSC : Remedial steps for better performance of high solids coatings - Global scenario of eco-friendly paint technology Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13360 [article]

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Influence of dibasic acids on the properties of modified polyurethane coatings / Syed Haseebuddin in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 2 (02/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 2 (02/1995) . - p. 68-70 Titre : Influence of dibasic acids on the properties of modified polyurethane coatings Type de document : texte imprimé Auteurs : Syed Haseebuddin, Auteur ; T. Padmavathi, Auteur ; K. V. S. N. Raju, Auteur ; M. Yaseen, Auteur Année de publication : 1995 Article en page(s) : p. 68-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Haut extrait sec Liants Polyuréthanes Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Rhéologie Viscosité Index. décimale : 667.9 Revêtements et enduits Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16921 [article]

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Oligourethane diol/melamine high solids / M. Yaseen in EUROPEAN COATINGS JOURNAL (ECJ), N° 5/97 (05/1997)

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Renewable materials in surface coatings / Syed Haseebuddin in PAINTINDIA, Vol. LVI, N° 12 (12/2006)

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Synthesis of polymeric dispersants from renewable DCO fatty acid and their multifunctional behavior in waterborne flat paint / Ravi Dara in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

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