Accueil
Catégories
> Essai de dureté
Essai de duretéVoir aussi
|
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
The dependence of pendulum hardness on the thickness of acrylic coating / Xiaoyang Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : The dependence of pendulum hardness on the thickness of acrylic coating Type de document : texte imprimé Auteurs : Xiaoyang Ma, Auteur ; Zemin Qiao, Auteur ; Zhifeng Huang, Auteur ; Xinli Jing, Auteur Année de publication : 2013 Article en page(s) : p. 433-439 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches épaisses
Essai de dureté
Polyacryliques
Revêtements:Peinture
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Pendulum hardness, which is widely used in the characterization of organic coatings, depends greatly on the thickness of the coating. However, it is still unclear whether a qualitative or quantitative relationship exists between pendulum hardness and coating thickness. In the present article, the pendulum hardness values of acrylic coatings with different thicknesses are measured using a König pendulum hardness tester to clarify the dependence of pendulum hardness on thickness of coating. The results show that the pendulum hardness of acrylic coatings decreases gradually with the increasing thickness of coating within a thickness range, and the sensitivity of pendulum hardness to thickness of coating depends greatly on the glass transition temperature of the coatings. An equation suitable for describing the relationship between logarithmic decrement of the amplitude of pendulum's oscillation and thickness of coating is presented, which can separate the contributions of substrate and coating on the logarithmic decrement. This study demonstrates that the measured value of pendulum hardness is not the bulk hardness value for the coating but the representative value of the system consisting of substrate and coating. An excellent correlation between pendulum hardness and thickness of acrylic coatings is obtained, which is fairly supported by the experimental data. Note de contenu : - EXPERIMENTAL : Materials and equipment - Preparation of coatings with different thickness - The measurement of pendulum hardness - The measurement of glass transition temperature
- RESULTS AND DISCUSSION : The calculation of logarithmic decrement of the amplitude of pendulum's oscillation - The relationship between logarithmic decrement and thickness of coating - The relationship between pendulum hardness and thickness of coating - Physical significance of pendulum hardnessDOI : 10.1007/s11998-013-9477-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9477-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18742
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 433-439[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Unique waterborne alternatives to traditional solvent-based coatings for industrial wood applications / Laurie Morris in COATINGS TECH, Vol. 15, N° 6 (06/2018)
[article]
Titre : Unique waterborne alternatives to traditional solvent-based coatings for industrial wood applications Type de document : texte imprimé Auteurs : Laurie Morris, Auteur ; Alberdingk Boley, Auteur Année de publication : 2018 Article en page(s) : p. 30-37 Langues : Américain (ame) Catégories : Bois -- Revêtements
Dispersions et suspensions
Essai de dureté
Essais (technologie)
Essais de résilience
Formulation (Génie chimique)
Polyacryliques
Polymères en émulsion
Polyuréthanes
Résistance chimique
Résistance thermique
Revêtements -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-based coatings made from WB UV resins, acrylic emulsions, and polyurethane dispersions all are good candidates for industrial wood coatings. They have very good chemical resistance and mechanical propertie. They can be formulated at low VOCs and have low toxicity. They are viable alternatives to solvent-based chemistries. Note de contenu : - EXPERIMENTAL : WATERBORNE UV COATINGS : Panel preparation (UV coatings - Other coatings) - Test methods (Chemical/stain resistance - Scrape adhesion - Ball point pen indentation - Plasticizer resistance - Green print resistance - Hot print resistance - Boiling water resistance - Hot and cold check resistance - Edge soak - Formulations) - Testing - results
- EXPERIMENTAL : ACRYLIC EMULSION : Formulations - Panel preparation (Birch plywood - glass) - Testing - Results
- EXPERIMENTAL : POLYURETHANE DISPERSION : Formulations - Panel preparation (3BH leneta cards - Birch plywood) - Testing - Results
- Fig. 1 : Chemical resistance (KCMA) 24-hour dwell (except mustard 1-hour dwell)
- Fig. 2 : Chemical resistance (other) 16-hour dwell
- Fig. 3 : Scrape adhesion and ball point pen indentation resistance
- Fig. 4 : Plasticizer, green print, and hot print resistance
- Fig. 5 : Boiling weter resistance
- Fig. 6 : Edge soak and hot cold check resistance
- Fig. 7 : Results from Koening pendulum hardness testing after 7 and 14 days
- Fig. 8 : Mustard
- Fig. 9 : Coffee, ethanol, and red wine
- Fig. 10 : Block resistance-room temperature, 1ib/sq in., overnight
- Fig. 11 : Block resistance - 50°C, 1000 g/sq in., 30 min.
- Fig. 12 : Boiling water resistance
- Fig. 13 : Scrape adhesion
- Fig. 14 : ABI emulsion vs competitive emulsion
- Fig. 15 : Chemical resistance-Leneta card
- Fig. 16 : Chemical resistance-birchpanel
- Fig. 17 : Boiling water resistance
- Fig. 18 : Scrape adhesion-5 kg
- Fig. 19 : Edge soak
- Fig. 20 : Taber abrasion-mg lost
- Fig. 21 : Koenig pendulum hardness
- Table 1 : Waterborne UV coatings formulations
- Table 2 : Waterborne UV coatings testing data
- Table 3 : Acrylic emulsion formulations
- Table 4 : Polyurethane dispersion formulationsEn ligne : https://drive.google.com/file/d/1pvbStFXZOZrDs2hfll7o9-pFugyYKIJE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31204
in COATINGS TECH > Vol. 15, N° 6 (06/2018) . - p. 30-37[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20269 - Périodique Bibliothèque principale Documentaires Disponible Versatile self-crosslinking polyurethane dispersion for low VOC coatings across multiple markets / Aditi Chavannavar in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4646 (11/2018)
[article]
Titre : Versatile self-crosslinking polyurethane dispersion for low VOC coatings across multiple markets Type de document : texte imprimé Auteurs : Aditi Chavannavar, Auteur ; Jacob P. Brutman, Auteur ; Don M. Barber ; P. Kangas Année de publication : 2018 Article en page(s) : p. 42-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Auto-réticulation
Brillance (optique)
Dureté (matériaux)
Essai de dureté
Essais d'adhésion
Formulation (Génie chimique)
Matières plastiques -- Revêtement
Polymères en émulsion
Polyuréthanes
Résistance chimique
Revêtements en phase aqueuse
Vernis en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Although solvent-based coatings are prominent in industrial applications, environmental regulations are pushing coating companies and formulators towards water-based systems". Industrial coatings include applications like household appliances, construction machinery, garage doors, fitness equipment, kitchen flttings, industrial joinery, etc. These are mostly applied on metal and the main function is to protect the substrate and make it aesthetically appealing. Other properties that industrial coatings need to have are adhesion to metal, block resistance and high gloss. In this area, we have benchmarked PUD prototype with PUD A and PUD B in white pigmented formulations. Additionally, we have compared PUD prototype to PUD C, which is a commercially available self-crosslinking PUD marketed for metal and plastic coatings. Table 9 summarises the properties of the resins in this application Note de contenu : - INDUSTRIAL COATING APPLICATIONS : Formulations and application - Application testing on CRS gloss and hardness - Adhesion - Chemical resistance - Block resistance
- CONCLUSION FOR INDUSTRIAL COATINGS
- PLASTIC APPLICATIONS : Formulation and application
- APPLICATION TESTING ON PC/ABS PLASTIC : Gloss - hardness - Chemical resistance - Resistance to sunscreen and insect repellent - Resistance to hand sanitiser - Adhesion to plastic
- CONCLUSION OF PLASTIC COATING STUDY
- Fig. 5 : Gloss and hardness of pigmented formulations
- Fig. 6 : Gloss for plastic coatings
- Fig. 7 : Konig pendulum hardness of the coatings for plastic
- Fig. 8 : Resistance to sunscreen and insect repellent
- Table 9 : Properties of resins in industrial coating study
- Table 10a : White pigmented formulation for PUD prototype
- Table 10b : White pigmented formulation for PUD A
- Table 10c : White pigmented formulation for PUDB
- Table 10d : White pigmented formulationfor PUD C
- Table 11 : Adhesion on CRS
- Table 12 : Cheimcal resistance of coatings
- Table 13 : One hour recovery after chemical resistance testing
- Table 14 : Block resistance of the coatings
- Table 15a : Soft touch, clear, matte formulation for PUD prototype
- Table 15b : Clear, matte formulation for PUD C
- Table 16 : Chemical resistance on plastic
- Table 17 : One hour recovery after chemical resistance testing
- Table 18 : Hand sanitiser resistance
- Table 19 : Adhesion to PC/ABSEn ligne : https://drive.google.com/file/d/1z3xM0GySly3M4eOpKATRBJdvl7c2S7Zg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31577
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 208, N° 4646 (11/2018) . - p. 42-45[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20368 - Périodique Bibliothèque principale Documentaires Disponible