A formaldehyde-free additive of crosslinker for coatings on plastics / Jeanne L. Courter in PAINTINDIA, Vol. LVII, N° 10 (10/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 10 (10/2007) . - p. 125-134 Titre : A formaldehyde-free additive of crosslinker for coatings on plastics Type de document : texte imprimé Auteurs : Jeanne L. Courter, Auteur ; Kuang-Jong Wu, Auteur ; Amy Essenfeld, Auteur Année de publication : 2007 Article en page(s) : p. 125-134 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The use of tris (alkoxycarbonylamino) triazine (TACT) in acrylic, epoxy, and polyester formulations is discussed with a variety of formulations chosen to illustrate critical aspects of working with this crosslinker and the properties that can be achieved. Forhydroxy-functional backbones, primary hydroxy functionality is superior to secondary hydroxy functionality. TACT is relatively insensitive to the presence of a wide variety of catalysts, making it suitable as a modifier for formulations consisting predominantly of hydroxyfunctional polymers. TACT is not only formaldehyde-free, but also brings enhanced performance such as improved acid etch resistance and accelerated weathering. Excellent latency which is indicated by a sharp onset of cure is shown in an infrared study. With epoxy-functional polymers and suitable catalysts, TACT can react at lower temperatures (also shown using an infrared study) indicating the potential of epoxy/TACT systems to be used in formulating two component (2K) coatings. Epoxy-TACT formulations are found to give excellent mar resistance and environmental etch resistance. The epoxy-TACT combination can be used to enhance formulations, for example, the humidity resistance of a polyester formulation containing TACT was improved using addition of aliphatic epoxy. Note de contenu : - Crosslinking hydroxy-functional polymers : Backbone selection - TACT as an additive : Crosslinking epoxy-functional polymers - Crosslinking hydroxy-functional polyesters - Hybric crosslinking Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11511 [article]

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Mar resistance of automotive clearcoats : relationship to coating mechanical properties / Jeanne L. Courter in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 866 (03/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 866 (03/1997) . - p. 57-63 Titre : Mar resistance of automotive clearcoats : relationship to coating mechanical properties Type de document : texte imprimé Auteurs : Jeanne L. Courter, Auteur Année de publication : 1997 Article en page(s) : p. 57-63 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Nettoyage Résistance à l'abrasion Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : Literature discussing coating mechanical properties and mar resistance is reviewed. Commercial car washing is the standard environmental source of damage. Most lab tests involve rubbing the coating with an abrasive and measuring the level of damage. The types of deformation that result are elastic, plastic, and fracture. For glassy coatings mar resistance is optimized at an intermediate toughness. The author proposes that optimization occurs due to the minimization of the number of both plastic- and fracture-type scratches. In addition, minimization occurs because the yield stress and toughness are in balance. Elastomeric coatings appear to have a minimum in mar resistance at intermediate crosslink density Note de contenu : - Definition - Customer need - Environmental factors causing marring - Assesing mar resistance - Understanding the marning process - Visual effect of scratches - Relationship of basic mechanical properties to mar resistance - Plastic-type scratches - Elastomeric coating - Glassy coatings - Hypothesis Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18108 [article]

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Micro- and nano-indentation and scratching for evaluating the mar resistance of automotive clearcoats / Jeanne L. Courter in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/99 (07-08/1999)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/99 (07-08/1999) . - p. 24-38 Titre : Micro- and nano-indentation and scratching for evaluating the mar resistance of automotive clearcoats Type de document : texte imprimé Auteurs : Jeanne L. Courter, Auteur ; Eduardo A. Kamenetzky, Auteur Année de publication : 1999 Article en page(s) : p. 24-38 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : To guide the development of mar resistant coatings, new test instruments and test methods are under development. The efforts seem to have begun from two points: first indentation and scratching for studying wear, and second atomic force microscopy. Several of these micro- and nano-scale methods were compared by testing a series of hydroxy-functional acrylic/melamine-formaldehyde coatings having a wide range of mar resistance. A Fischer-scope H100' was used to do micro-scale instrumented indentation, a Triboscope' was used to do nano-indentation and nano-scratching, and a prototype micro-scale scratch tester was used to do scratch tests. Universal hardness, creep rate and residual indentation depth were self-correlated. Mar resistance was best when universal hardness was lowest. Micro-scratching was found to reveal qualitative differences that correlated with mar resistance, including resistance to cracking during scratching. Note de contenu : - What mar resistance is - Coating compositions - Laboratory mar resistance tests - Level of variation in laboratory mar resistance test - Comparison of the two laboratory mar resistance test results - Characterization of damage from laboratory mar resistance tests - Micro-scale instrumented indentation - Stylus tests - Introduction - Nanoindentation and nanoscratching - Nano-indentation - Nano-scratching - Micro-scratching En ligne : https://drive.google.com/file/d/1-qow2oSItR1KBsSQOHmLHw4eGljg2z4k/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11200 [article]

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