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Sustainable, low-emissions, high-performance polyols for wood floor coatings / Gary Spilman in COATINGS TECH, Vol. 15, N° 10 (10/2018)
[article]
Titre : Sustainable, low-emissions, high-performance polyols for wood floor coatings Type de document : texte imprimé Auteurs : Gary Spilman, Auteur ; Scott Moore, Auteur ; Simone J. Marshall, Auteur Année de publication : 2018 Article en page(s) : p. 34-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Bois -- Vernis
Brillance (optique) -- Mesure
Dureté (matériaux)
Formulation (Génie chimique)
Isocyanates
Polyols
Polyuréthanes
Résistance à l'abrasion
Résistance aux taches
Résistance chimique
Vernis -- Additifs
Vernis bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : The industrial wood coatings space is undergoing some challenges and changes while continuing to grow. The development of sustainable, low-emissions, high-performance wood floor coating technologies continues to be of high interest to the coatings industry. Sustainable content in these coatings contributes to an improved environmental footprint, while low-emission compositions improve the indoor air quality and thereby the health and well-being of building and home occupants desiring to re-occupy these structures as soon as possible. Biorenewablecontent polyols that incorporate low volatile organic content (VOC) (<150 g/L) technology to yield two-component (2K) polyurethane wood floor coatings that have excellent stain and chemical resistance, excellent adhesion to both bare and prefinished floors, good abrasion resistance, low odor, and excellent gloss have been developed. The new coating properties may be readily tailored to meet the individual needs of different floor coating jobs by simply adjusting the isocyanate index or isocyanate type. This study compared a new fully formulated, 150 g/L coating based on this sustainable resin technology and demonstrated properties consistent with being the best overall protective coating for wood at the most economical usage (matching or better finish is achieved with only two coats vs the commercial products needing four or five coats over both original and refinished wood flooring) and lowest VOC in the test group. Initial performance from converting the new floor-coating products into waterborne systems was also investigated. Note de contenu : - Table 1 : Isocyanate materials used
- Table 2 : Formulation additives
- Table 3 : Adhesion data
- Table 4 : Chemical resistance (MFMA specification)
- Table 5 : Hardness data
- Table 6 : Isocyanate blending results
- Table 7 : Catalyst ladder at two index levels for IPDI trimer
- Table 8 : Final 2K coating formulation taber test data
- Table 9 : Benchmark samples
- Table 10 : Final film properties of RMG 2K SB formulated 150 g/L coating vs MFMA specification
- Fig. 1 : König hardness results of commercial vs developmental samples
- Fig. 2 : a) Pencil hardness and b) adhesion results of commercial vs developmental samples
- Fig. 3 : Taber abrasion results at 100 and 500 cycles, grams weight loss
- Fig. 4 : Impact results
- Fig. 5 : Gloss reading readings for various products tested ve RMG 2K SB
- Fig. 6 : Gloss and distinctness of image from the developmental 2K solventborne coating over scuffed UV-cured OEM floor finish on maple
- Appendix : Final wood coating formulation for 75% we solids at 150 g/L VOCEn ligne : https://drive.google.com/file/d/1X210OPR2aKp7V5EM5u7S47PvbF1lJjQB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31828
in COATINGS TECH > Vol. 15, N° 10 (10/2018) . - p. 34-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20636 - Périodique Bibliothèque principale Documentaires Disponible Sustainable polyurethanes are here to stay / Wolfgang Geuking in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2021)
[article]
Titre : Sustainable polyurethanes are here to stay : Bio-based polyols provide flexible, versatile multi-substrate solutions Type de document : texte imprimé Auteurs : Wolfgang Geuking, Auteur ; Nathan Noyes, Auteur ; Eric Brouwer, Auteur Année de publication : 2021 Article en page(s) : p. 34-38 Langues : Anglais (eng) Catégories : Biopolymères
Colles:Adhésifs
Durée de vie (Ingénierie)
Matériaux -- Allègement
Polyesters
Polyols
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Résistance thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The polyester polyols presented in this paper are based on C36-dimer acids from natural oils, giving these products high renewable content. To meet industry's need to move towards sustainable and bio-based materials, a new portfolio of 100 0/0 bio-based-polyester polyols have been developed. The branched non-crystalline dimer-acid structure offers (low temperature) flexibility, prevents strain-induced crystallisation and enhances wetting properties, while the hydrocarbon character imparts water repellence and affinity for a wide range of substrates. Furthermore, they provide a unique combination of enhanced hydrolytic and thermo-oxidative stability, which is highly relevant for demanding applications such as transportation and electronic adhesives or renewable energy systems. Note de contenu : - Changing needs for a changing world
- Bio-based-polyol technology
- New 100% bio-ased polyols for polyurethane adhesives
- Highly durable polyurethane adhesives
- Exposure trials
- Flexibility and reduced flex fatigue
- Versatile adhesion
- Life-cycle analysis
- Measuring bio-content
- Sustainability in use
- Fig. 1 : Thermo-oxidative and hydrolytic resistance of bio-based, reactive PU-adhesive films
- Fig. 2 : Elongation curves for adhesives films
- Fig. 3 : Adhesion to a variety of difficult to bond substrates
- Fig. 4 : Adhesion to polycarbonate
- Fig. 5 : Adhesion after exposure to high humidity
- Fig. 6 : Typical life-cycle analysis of cumulated CO2 equivalent absorption and emissios for fossil fuel-based and biobased products
- Fig. 7 : Reduced fuel consumption due to light weightingin cars, enabled by bio-based adhesives
- Table 1 : Bio-based-polyol gradesEn ligne : https://drive.google.com/file/d/1UT0AfpRUKppLatm1Mmz-nFvGy9COVskO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35862
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2021) . - p. 34-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22750 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of castor oil-based branched polyols from renewable resources and their polyurethane-urea coatings / Allauddin Shaik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
[article]
Titre : Synthesis and characterization of castor oil-based branched polyols from renewable resources and their polyurethane-urea coatings Type de document : texte imprimé Auteurs : Allauddin Shaik, Auteur ; Kabir Baidya, Auteur ; Kirankumar M. Nehete, Auteur ; Subarna Shyamroy, Auteur Année de publication : 2019 Article en page(s) : p. 387-400 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydride succinique
Caractérisation
Copolymère uréthane-urée
Gonflement (physique)
Huile de ricin et constituants
Polymères -- Synthèse
Polymères ramifiés
Polyols
Polyuréthanes
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The chemical modifications of castor oil (CO) to develop branched polyols and their polyurethane-urea coatings have been investigated. For this purpose, castor oil-based branched polyols (COBPs) were synthesized from CO by modifying with succinic anhydride followed by reaction with hydroxyl group moieties like petrochemical-based pentaerythritol, trimethylolpropane and bio-based glycerol. The COBPs were characterized by using Fourier transform infrared, 1H and 13C nuclear magnetic resonance spectroscopies, gel permeation chromatography and differential scanning calorimetry. These COBPs were further urethanized with isophorone diisocyanate at OH/NCO ratio of 1:1.6 to get the isocyanate-terminated polyurethane prepolymers. The surplus isocyanate groups of the prepolymer were cured with atmospheric moisture at ambient temperature condition to form uniform film with fast surface drying. The thermo-mechanical, viscoelastic and swelling properties were evaluated for the cured coating films. Properties have been discussed from the viewpoint of branched network and also the urethane segment present in the structure. The glass transition temperatures of the coating films were found to be in the range of 32–64°C. The modified castor oil coating films show better thermo-mechanical and viscoelastic properties in comparison with control (unmodified castor oil) coating films. This work delivers an effective and promising way to synthesize branched moieties in plant oil-based high performance coatings. Note de contenu : - EXPERIMENTAL SECTION : Materials
- METHODS : Synthesis of acid-terminated castor oil (COSA) - Synthesis of castor oil-based branched polyols (COBPs)
- CHARACTERIZATION : Structural analysis of CO, COSA and COBPs - Drying time - DMA analysis - Swelling properties - TGA analysisDOI : 10.1007/s11998-018-0118-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0118-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32411
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 387-400[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20894 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of degradable polyurethane based on poly(ether ester) polyols (PPG-2000 and ε-caprolactone/lactic acid) for marine antifouling / Jie Yi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 3 (05/2015)
[article]
Titre : Synthesis and characterization of degradable polyurethane based on poly(ether ester) polyols (PPG-2000 and ε-caprolactone/lactic acid) for marine antifouling Type de document : texte imprimé Auteurs : Jie Yi, Auteur ; Runtao Ren, Auteur ; Congshu Huang, Auteur ; Chuyi Zhang, Auteur ; Yupu Ma, Auteur Année de publication : 2015 Article en page(s) : p. 525-532 Note générale : Bibliogr. Langues : Américain (ame) Catégories : e-caprolactone
Hydrolyse
Marines (peinture)
Polyéther ester
Polymères -- Biodégradation
Polymères -- Synthèse
Polyols
Revêtements -- Détérioration:Peinture -- Détérioration
Revêtements antisalissures:Peinture antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : Poly(ether ester) polyols consisting of polypropylene glycol-2000 (PPG-2000) and different ratios of ε-caprolactone and lactic acid (LA) had been prepared by polycondensation reactions. Degradable polyurethane (PU) films were prepared with poly (ether ester) polyols and hexamethylene diisocyanate trimer. Hydrolytic degradation experiments demonstrated that PU films could be degradable in artificial seawater. Importantly, the hydrolytic degradation of PU films in artificial seawater increased with the increase of LA content. The results also showed that the surfaces of PU films were renewed and kept active, as revealed by the scanning electron microscope micrographs of degradation PU coatings. Moreover, the copper ion release rates of PU coatings prepared with poly(ether ester) polyols reached steady state at about 35 days. The degradable polyurethanes based on poly(ether ester) polyols (PPG-2000, ε-caprolactone, and LA) could be effective and durable resins for marine antifouling. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of poly(ether ester) polyol - Preparation of PU fils - The determination of properties
- RESULTS AND DISCUSSION : Synthesis and characterization of poly(ether ester) polyols and PU films - Water absorption rate of PU films - Hydrolytic degradation of PU chips - Copper ion release rates of PU coatings - SEM microcraphs of PU-CL10/LA2 coatingsDOI : 10.1007/s11998-014-9646-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9646-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24176
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 3 (05/2015) . - p. 525-532[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17244 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and spectroscopic characterisation of the polygalloyl esters of polyols-models for gallotannins / H. R. Tang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 5 (09-10/2003)
[article]
Titre : Synthesis and spectroscopic characterisation of the polygalloyl esters of polyols-models for gallotannins Type de document : texte imprimé Auteurs : H. R. Tang, Auteur ; Anthony D. Covington, Auteur ; R. A. Hancock, Auteur Année de publication : 2003 Article en page(s) : p. 179-188 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Caractérisation
Composés organiques -- Synthèse
Esters polygalloyliques
Gallo-tanins
PolyolsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Hydrolysable gallotannins are naturally occurring polygalloyl esters of polyols (e.g., glucose) and are widespread in the plant kingdom. A totally new synthesis is described here for polygalloyl (3,4,5-trihydroxybenzoyl) esters of polyols as structural models for gallotannins, so that the structure-function relationships of this group of phytochemicals can be studied. The new synthesis consists of two steps, condensation of trimethoxybenzoyl chloride with a polyol and demethylation with anhydrous aluminium chloride/thiol. Compared to methods already reported, the new synthesis shortens the total reaction time by up to 30 times and gives high yields. Six polygalloyl esters of polyols were synthesised: di-galloyl-ethylene glycol (DGE), tri-galloyl-glycerol (TGG), tetra-galloyl-meso-erythritol (TGE), penta-galloyl-adonitol (PGA), ß-penta-galloyl-D-glucose (PGG) and hexa-galloyl-dulcitol (HGD). Amongst them, TGE, PGA and HGD are prepared for the first time. The polyphenols and
their permethylated derivatives were characterised using a combination of NMR and mass spectroscopic techniques. The effects of galloylation on the NMR properties of polyols are also discussed.Note de contenu : - EXPERIMENTAL :
- Materials and methods
- Preparation of poly-(3,4,5-trimethoxybenzoyl)-polyols
- Demethylation of permethylated polygalloyl polyols
- RESULTS AND DISCUSSION :
- Synthesis of polygalloyl polyols
- Spectroscopic characterisation of permethylated polygalloyl esters
- Spectroscopic characterisation of polygalloyl polyols
- Table 1 : Data for permethylated polygalloyl esters 2a-7a
- Table 2 : H NMR data for permethylated polygalloyl esters 2a - 7a*
- Table 3 : 13C NMR data for permethylated polygalloyl esters 2a - 7a*
- Table 4 : Data for polygalloyl esters of polyols 2 - 7
- Table 5 : H NMR data for polygalloyl esters (2-7)
- Table 6 : 13C NMR Data for polygalloyl esters 2-7En ligne : https://drive.google.com/file/d/1dJsl5exn-XbLBsFXulD7COfgg5qdqqkQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39743
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 5 (09-10/2003) . - p. 179-188[article]Synthesis and structure-property evaluation of polyurethane dispersions based on various dicarboxylic acids / Vilas D. Athawale in PAINTINDIA, Vol. LX, N° 2 (02/2010)
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