Development of high throughput method for evaluating the effect of additives on foam stabilization in clear coatings / Jeff Anderson in COATINGS TECH, Vol. 10, N° 1 (01/2013)  

[article]  inCOATINGS TECH > Vol. 10, N° 1 (01/2013) . - p. 30-32 Titre : Development of high throughput method for evaluating the effect of additives on foam stabilization in clear coatings Type de document : texte imprimé Auteurs : Jeff Anderson, Auteur ; Rebecca Ortiz, Auteur Année de publication : 2013 Article en page(s) : p. 30-32 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimousse Cisaillement (mécanique) Surfactants Vernis en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : One of the more challenging aspects of formulating water-based coatings is in the selection of a foam control additive package and evaluating its effect on the ability of the formulation to resist and release entrained air. Current laboratory methods of analyzing defoaming efficency can be complicated, time consuming, and typically require significant volumes of materials for testing. The novel method presented here allows for small volume, high throughput analysis of the effect of foam control additives and other surfactants on the ability of a coating formulation to resist air entrainment. The method additionally allows for use of "shear rate" and "time of recovery" as process variables that can be used to simulate a diverse range of conditions that a coating may experience during the manufacturing or application process. Furthermore, the unique approach of using color as a comparative tool to evaluate the relative amount of air in the liquid coating formulations is shown to be an effective means of analysis. Note de contenu : - BRIEF DESCRIPTION OF FOAM CONTROL ADDITIVES - CONVENTIONAL HIGH SHEAR DEFOAMER EVALUATION METHOD - LOW SHEAR METHODS - EXPERIMENTAL DESIGN AND SAMPLE PREPARATION - PROPOSED HTR WORKFLOW - PICA II - IMAGE ANALYSIS - RESULTS AND DISCUSSION : High throughput defoaming method : proof of concept - Measurement of liquid height as a proxy for density - Measurement of color to evaluate defoameer effectiveness - Reproducibility of the control En ligne : https://drive.google.com/file/d/1Ux6QcwWejNHsirHgm0jATvGyE5qYTw6j/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17432 [article]

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Fast, safe and flexible / John Argyropoulos in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2015)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2015) . - p. 42-48 Titre : Fast, safe and flexible : Novel PU chemistry combines rapid cure with extended pot-life Type de document : texte imprimé Auteurs : John Argyropoulos, Auteur ; Nahrain Kamber, Auteur ; Paul Popa, Auteur ; David Pierce, Auteur ; Yanxiang Li, Auteur ; Paul Foley, Auteur ; Gary Spilman, Auteur ; Jeff Anderson, Auteur Année de publication : 2015 Article en page(s) : p. 42-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcools Durée de vie en pot Essais (technologie) Formulation (Génie chimique) Polyols Primaire (revêtement) Réticulation (polymérisation) Revêtements sans isocyanates Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Traditional two-component ambient-cure polyurethanes must balance cure speed against pot-life. A novel isocyanate-free polyurethane curing chemistry effectively decouples pot-life and cure speed. The coatings offer excellent chemical resistance, adhesion, mechanical properties and weatherability. Note de contenu : - Preparation of test coatings summarised - Test equipment and procedures used - New chemistry can be based on standard polyols - Reversible reaction with alcohols extends pot-life - Reaction equilibrium studied - Initial tests show high coating performance - Primer-surfacer has fast dry-to-sand time - Physical properties are good, with long pot-life - High performance with flexibility in application En ligne : https://drive.google.com/file/d/1wtwU8bQVw7lGchK8hdf5HNxGtduHIYBF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25284 [article]

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Quantitative method for evaluating fingernail induced mar damage of coatings / Jeff Anderson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 579-588 Titre : Quantitative method for evaluating fingernail induced mar damage of coatings Type de document : texte imprimé Auteurs : Jeff Anderson, Auteur ; Matthew Brown, Auteur ; Charles Kan, Auteur ; Nanjundiah Kumar, Auteur ; Vivek Kalihari, Auteur Année de publication : 2013 Article en page(s) : p. 579-588 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ongles Résistance à l'abrasion Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : A traditional method of coating qualification, known as fingernail mar resistance, historically has been practiced in industry where the back of a fingernail is “flicked” across a coating surface. Any resulting permanent mark from this qualitative analysis is deemed a failure. Lack of quantitative analysis and control over experimental parameters in this type of test limits its utility as an analytical test. Fundamental understanding of this specific type of mar damage is hindered, and research efforts to find unique solutions based on changes in polymer structure are frustrated by the binary response of the test. In an attempt to rectify the situation, a high speed mar tester was developed to mimic and quantify the effects of the fingernail flick test. The work described in this report demonstrates the applicability of this tester to produce similar damage to that of the fingernail test. In addition, a quantitative method enabling differentiation of the degree of mar damage of different coatings is described. Finally, the method is demonstrated by differentiating mar resistance of coatings that show similar qualitative results in fingernail flick testing. Note de contenu : - EXPERIMENTAL PROCEDURES : Stylus - Velocity of stylus - Coating selection and preparation - Surface profile - Image capture - Image analysis - Visual analysis - Dynamic friction - Evaluation of fingernail mar - RESULTS AND DISCUSSION : Surface profile of mar and scratch damage - Visual evaluation DOI : 10.1007/s11998-013-9478-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9478-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19107 [article]

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