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Partager le résultat de cette rechercheCharacterization of adhesion performance of topcoats and adhesion promoters on TPO substrates / Jonathan E. Lawniczak in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 5 (01/2005)
Titre : Characterization of adhesion performance of topcoats and adhesion promoters on TPO substrates Type de document : texte imprimé Auteurs : Jonathan E. Lawniczak, Auteur ; Kevin A. Williams, Auteur ; Louis T. Germinario, Auteur Année de publication : 2005 Article en page(s) : p. 399-405 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Propriété interface' 'Promoteur adhérence' 'Etude expérimentale' Automobile Application 'Essai pelage' 'Méthode mesure' Adhésivité 'Relation mise en oeuvre propriété' 'Polymère chloré' 'Oléfine dérivé halogéné polymère' 'Couche primaire' 'Traitement surface' Prétraitement Peinturage Caractérisation 'Procédé revêtement' 'Matériau revêtu' Elastomère 'Mélange polypropène 'Caoutchouc thermoplastique' Index. décimale : 667.9 Revêtements et enduits Résumé : Adhesion of organic coatings to thermoplastic olefin (TPO) substrates in automotive applications has been an issue for makers of automotive parts since TPO was first used in exterior applications, primarily fascia. A widely used technique for assuring paint adhesion to TPO is the use of adhesion promoter primers based on chlorinated polypropylenes (CPO). Much research has been focused on understanding the forces involved at the interfaces of substrate, adhesion promoter, and topcoats resulting in the adhesion or the loss of adhesion in various environmental conditions. This study correlates the adhesion performance of CPO and nonchlorinated adhesion promoters (NCPO) as measured by peel strength with properties observed through microscopy techniques. Adhesion performance of CPOs, NCPOs, and blends are quantified through the use of 90° and 180° peel strength studies. Surface characteristics of adhesion promoters applied over a TPO substrate and cured at various temperatures are examined through the use of atomic force microscopy (AFM). DOI : 10.1007/s11998-005-0007-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0007-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3729
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 5 (01/2005) . - p. 399-405[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000589 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Chlorinated butyl acrylate - methyl methacrylate copolymer : A novel film former Type de document : texte imprimé Auteurs : S. Bhandari, Auteur ; S. Chandra, Auteur Année de publication : 1995 Article en page(s) : p. 27-32 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Copolymère acrylate de butyle' 'Polymétacrylate méthyle' Chloration chlore' 'Stabilité thermique' 'Propriété mécanique' Feuil chimique' 'Résistance feu' 'Etude expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Maximum 25.6 per cent chlorine content could be achieved during the chlorination of butyl acrylate - methyl methacrylate copolymer. Infrared analysis revealed that chlorine enters only in the main chain by the substitution reaction. The thermal stability was found increasing with the chlorine content. Chlorinated copolymer possessed superior film properties as compared those of the unchlorinated except in terms of flexibility and adhesion. The property of resistance to fire was also introduced in the copolymer on chlorination. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of Poly (butyl acrylate) - Chlorination of Poly (butyl acrylate) - Synthesis and chlorination of butyl acrylate - methyl methacrylate copolymer - Infrared analysis - Determination of thermal stability - Mechanical and chemical film properties - Test for fire resistance
- RESULTS AND DISCUSSION : Viscosity and solubility - Substitution of chlorine - Thermal stability - Flexibility and adhesion - Impact resistance - Scratch hardness - Water, acid and alkali resistance - Fire resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13643
in PAINTINDIA > Vol. XLV, N° 6 (06/1995) . - p. 27-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006452 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Comparison of the electrochemical behaviour of MIO, TIO2 pigments in chlorinated rubber binders Type de document : texte imprimé Auteurs : M. Selvaraj, Auteur Année de publication : 1996 Article en page(s) : p. 33-38 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture anticorrosion' 'Pigment minéral' Fer Oxyde 'Structure lamellaire' 'Concentration pigmentaire volumique' 'Caoutchouc chlore' 'Propriété électrochimique' Feuil Index. décimale : 667.9 Revêtements et enduits Résumé : Barrier coatings containing lamellar structural pigments are formulated at a lower range of pigment volume concentration (PVC) than the spherical structural pigmented coating. The low PVC lamellar structural pigmented formulation protects the steel structures for longer duration than the higher PVC spherical structural pigmented formulation. In this study, chlorinated rubber based coatings pigmented with MIO (25 PVC) and titanium dioxide (36 PVC) are prepared. These coatings are evaluated by electrochemical techniques such as potential, polarisation and impedence measurements in 3% sodium chloride solution for regular intervals. The results are also well comparable with accelerated salt spray test. The experimental result shows that the MIO pigmented coating protects the steel substrates for longer duration than the TiO2 pigmented coating. Note de contenu : - Experimental: - Electrode Preparation - A. C. Impedance Measurements - Polarisation Studies : Tafel Extrapolation Method - Electrode Potential Measurement - Accelerated Tests Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13519
in PAINTINDIA > Vol. XLVI, N° 12 (12/1996) . - p. 33-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006509 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Exterior Durability : II Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 1999 Article en page(s) : p. 61-69 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau revêtement' Peinture Durabilité Feuil 'Exposition intempérie' 'Résistance 'Dégradation photochimique' Adjuvant 'Absorbant UV' Antioxydant Amine Pigment Liant 'Polymère chlore' Hydrolyse 'Article synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : Exterior durability of coatings refers to their resistance to change during outdoor exposure; such changes include changes of modulus, loss of strength, embrittlement, discoloration, loss of adhesion, chalking, loss of gloss, and environmental etching. Thus, both aesthetic and functional properties are involved. The terms outdoor durability and weatherability are also used. This series examines exterior durability, focusing on the most common chemical processes leading to degradation of coatings-photoinitiated oxidation and hydrolysis resulting from exposure to sunlight, air, and water. These processes are interrelated, including enhanced photoxidative degradation in high humidity and enhanced hydrolytic degradation during photoexposure. Furthermore, both processes are accelerated by higher temperatures. Hydrolytic degradation may be enhanced by exposure to acid, as from acid rain. Other atmospheric degradants include ozone and oxides of nitrogen and sulfur. Changes in temperature and humidity may result in cracking, which arises from the expansion and contraction of coatings or substrates. Rates at which these processes occur vary, depending on exposure site(s), time of year, coating composition, and substrate. Note de contenu : - PHOTOSTABILIZATION : UV absorbers and excited state quenchers - antioxidants - Hindered amine light stabilizers - Pigmentation effects
- DEGRADATION OF CHLORINATED RESINS
- HYDROLYTIC DEGRADATIONPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17831
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 889 (02/1999) . - p. 61-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003558 - Périodique Bibliothèque principale Documentaires Disponible 009603 - Périodique Bibliothèque principale Documentaires Exclu du prêt
Titre : Novel chlorinated film formers for high performance coatings Type de document : texte imprimé Auteurs : S. Bhandari, Auteur ; S. Chandra, Auteur Année de publication : 1995 Article en page(s) : p. 19-35 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Polymère chlore' 'Résine alkyde' Préparation Chloration 'Huile soja' 'Corps gras végétal' époxyde' 'Polyacrylate de butyle' 'Copolymère acrylate méthacrylate méthyle' 'Propriété thermique' mécanique' chimique' Feuil 'Article synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : Chlorinated alkyds, epoxy esters and butyl acrylate-méthyl methacrylate (BA-MMA) copolymers were synthesised by bubbling dry chlorine gas in carbon tetrachloride solution. The chlorination of DCO alkyd was studied both in the absense as well as in the presence of iodine catalyst. Soybean and nigerseed oil alkyds and linsseed oil epoxy ester were, however, chlorinated without catalyst only. The chlorination of BA-MMA copolymer was performed in the presence of UV light.
It was found that the maximum chlorine content of about 50-55 per cent could be achieved in DCO, soybean and nigerseed oil alkyds and linseed oil epoxy ester. Five samples each of chlorinated DCO, soybean and nigerseed oil alkyds and four samples of chlorinated epoxy ester, varying in the chlorine content, were synthesized in order to study the effect of chlorine. In the case of BA-MMA copolymer maximum chlorine content about 26 per cent was obtained. One more sample of chlorinated BA-MMA copolymer, with lesser chlorine content, was synthesized for comparison purposes.
It was confirmed through IR spectroscopy that chlorine enters only into the aliphatic portions of all the three alkyds and epoxy ester molecules by addition and substitution reactions and only into the aliphatic main chain of the BA-MMA copolymer molecule by substitution reaction.
Thermal stability of all the chlorinated products was determinated by the Bloomfield test and by the weight loss procedure and compared with that of the commercial sample of chlorinated rubber. It was found that the termal stability increases with the chlorine content. In the case of chlorinated BA-MMA copolymers, the thermogravimetric analysis (T.G.A) was also carried out which further confirmed that the thermal stability increases with the chlorine content.
All the products were characterized for sulubility, compatibility, colour viscosity, iodine value, epoxide equivalent and molecular weight. The mechanical and chemical film properties were also appraised simultaneously which revealed that, in general, the cholorinated products possessed superior film properties as compared to those of the unchlorinated ones expect in terms of flexibility and adhesion and solvent resistance.
All the chlorinated products also passed the standard tests for protection against corrosion and resistance to salt-spray and fire, justifying their application in high performance coatings.Note de contenu : - Important materials
- Chlorinated DCO alkyds : Preparation of alkyd - Chlorination - Samples prepared
- Chlorinated soybean oil alkyds : Preparation of alkyd - Chlorination - Samples prepared
- Chlorinated nigerseed oil alkyds : Preparation of alkyd - Chlorination - Samples prepared
- Chlorinated epoxy esters : Preparation of epoxy ester - Chlorination - Samples prepared
- Chlorinated acrylics : Preparation of poly (butyl acrylate) - Chlorination - Preparation of chlorinated butyl acrylate-methyl methacrylate (BA-MMA) copolymer - Sample prepared
- Characterization : Solubility and compatibility - Colour - Viscosity - Addition/substitution of chlorine - Thermal stability
- Evaluation : Drying time - Flexibility and adhesion - Impact resistance - Scratch hardness - Water, acid and alkali resistance - Solvent resistance - Protection against corrosion - Resistance to salt-spray - Fire resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13620
in PAINTINDIA > Vol. XLV, N° 7 (07/1995) . - p. 19-35[article]Réservation
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