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Role of promoters other than silanes in improving adhesion of organic coatings to a substrate / M. Yaseen in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 21-27 Titre : Role of promoters other than silanes in improving adhesion of organic coatings to a substrate Type de document : texte imprimé Auteurs : M. Yaseen, Auteur ; M. N. Sathyanarayana, Auteur Année de publication : 1995 Article en page(s) : p. 21-27 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture  Adhérence  Adjuvant  'Agent  accrochage'  'Siloxane  polymère'  Amide  Imide  Siloxane  'Sel  organique'  'Titane  Composé  'Phosphore  'Zirconium  'Aluminium  'Article  synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : The prime function of an organicc coating is protect the substrate from destructive effects of products like mopisture, soluble salts, corrosive vapours or gases, etc. It is evident that whatever excellent properties the coating may have, its prime function is not fulfilled, if its adhesion ot the substrate is not of a high order. The most promising and commonly used method to enhance/improve the adhesion of coatings is the use of small amounts of coupling agents in the formulations. Silanes are a group of adhesion promoters. Their functions and findings of research workers have been discussed in an earlier review. In the present review, the findings on the use of promoters other than silanes which are considered as new classes of adhesion promoters, have been discussed. The general observations on the performance of these promoters described in a tabular form may serve as guidelines in selecting the suitable adhesion promoters. Note de contenu : - Promoters other than silanes : - Silicones and silicone modified polymers - Amide/Imides - Siloxanes - Naphtenates (metallic soaps) - Organic titanates - Organophosphorus enamines - Zirco aluminates - Silyl group containing resin compositions - Additives other than silanes - Miscellaneous adhesion promoters - General observations on the performance of adhesion promoters other than silanes Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13638 [article]

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Study of hetero-functional initiators for acrylic coatings resins / Bharat J. Udeshi in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 29-36 Titre : Study of hetero-functional initiators for acrylic coatings resins Type de document : texte imprimé Auteurs : Bharat J. Udeshi, Auteur Année de publication : 1995 Article en page(s) : p. 29-36 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  haute  teneur  solide'  Liant  'Acrylique  dérivé  polymère'  Préparation  'Polymérisation  radicalaire'  'Amorceur  'Composé  azoïque'  'Etude  expérimentale'  Azonitrile  '2,2p-Diazènediisobutyrique  acide  ester  diméthyle' Index. décimale : 667.9 Revêtements et enduits Résumé : The initiator plays a dominant role in the free radical synthesis of acrylic based coating resins. Both the chemical nature of the initiator and the polymerization conditions greatly influence the efficiency of the polymerization and the final resin properties. The effect was examined of change in side chain group in azo initiator with replacement of nitrile group to isobutyrate group with no major change in initiator half-life temperature, on the viscosity, solubility and MWD of acrylic resins produced by solution polymerization using them. Best solution in wide range of solvents,ranging from aromatic - ester - aliphatic solvent class, was achieved with 2,2'-azobis(methyl isobutyrate) v/s selected azonitrile initiators and its versatility was seen for preparing a range of resins with low MW, narrow polydispersity, low viscosity and reduced volatiles. Work was also reported on comparing the azo initiator efficiency og 2,2'-azobis ( methyl-isobutyrate) v/s alkyl perester initiator, tert-butyl perbenzoate and tert-butyl perisononanoate. Weathering performance of acrylic/isocyanate clear coasts using resins prepared with some of the initiators is reported. Note de contenu : - Experimental design : - Resin synthesis - Initiators - Characterization - Coating formulations, preparation and properties - Results and discussion : - High-solid acrylic resin - Mineral turpentine thinnable acrylic resin - Initiator selection - Film properties Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13639 [article]

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Advances in electrodeposition plants in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 37-40 Titre : Advances in electrodeposition plants Type de document : texte imprimé Année de publication : 1995 Article en page(s) : p. 37-40 Langues : Anglais (eng) Tags : Peinturage  'Dépôt  électrophorèse'  Equipement Index. décimale : 667.9 Revêtements et enduits Résumé : ED plants in their workmanship and reliability have been improved over the years. Today ED plant is a backbone facility for a modern paintshop. Especially for automobile industris having a large scale production volume, an ED plant with complete atomization is a must. Efforts were taken from time to time to provide more and more facilities for optimum performance and trouble free running. An attempt is being made here to acquaint the readers with various equipments involved in ED plants and their functions. Latest trends in plant designing are also discussed. Note de contenu : - Electrodeposition mechanism - Various equipments involved in ED plant - ED plant designing aspects - Current trends in ED plant designing - ED tank lining - Automation of plants Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13640 [article]

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Management of Technology / V. C. Malshe in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 51-53 Titre : Management of Technology Type de document : texte imprimé Auteurs : V. C. Malshe, Auteur Année de publication : 1995 Article en page(s) : p. 51-53 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Note de contenu : - THE MAINTENANCE OF EXISTING TECHNOLOGY - IDENTIFICATION OF TECHNOLOGICAL BREAK THROUGH - AWARENESS OF SERENDIPITY - INVOLVEMENT IN IDENTIFICATION OF SOURCES OF TECHNOLOGY - INTERACTION WITH THE TECHNOLOGY SUPPLIER - IN HOUSE VERSUS SPONSORED RESEARCH - CLOSING A PROJECT Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13681 [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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Vegetable oils / Clive H. Hare in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 60-64 Titre : Vegetable oils : Anatomy of Paint - Part : XX Type de document : texte imprimé Auteurs : Clive H. Hare, Auteur Année de publication : 1995 Article en page(s) : p. 60-64 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Note de contenu : - The properties of Raw Oils - Modified oils - Alkali-Refined Oils - Polymerized Oils - Dehydration - Co-polymerization - Maleinization - Epoxidized Oils - Other chemical modifications - Miscellaneous treatments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13692 [article]

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Cationic UV flexo : an alternative technology / David Atkinson in PAINTINDIA, Vol. XLV, N° 12 (12/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 71-73 Titre : Cationic UV flexo : an alternative technology Type de document : texte imprimé Auteurs : David Atkinson, Auteur Année de publication : 1995 Article en page(s) : p. 71-73 Langues : Anglais (eng) Tags : Encre  Flexographie  Durcissement  'Rayonnement  UV'  'Polymérisation  cationique'  Adhérence  'Propriété  rhéologique'  Viscosité  Odeur Index. décimale : 667.9 Revêtements et enduits Résumé : With the drive to environmentally friendly ink systems, printers are looking at the alternatives to solvent-based systems. Although water-based and free radical radiation curing systems are the best known alternatives, a third technology-cationic UV curing - is being explored by the UK's ink research association, Pira. The results to date are very promising, reports David Atkinson, in an article in the July 1995 issue of Polymers Paint Colour Journal. Note de contenu : - Water based systems - Radiation cured systems - Reduced downtime - Cationic UV ink systems - Excellent adhesion - Low viscosity - Lamination properties - Low odour Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13693 [article]

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