Dimethyl secondary amine chain extenders : a conceptual approach to in situ generation of advanced epoxy resins for rapid-cure, low-VOC coatings / Frederick H. Walker in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 3 (09/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 3 (09/2009) . - p. 283-313 Titre : Dimethyl secondary amine chain extenders : a conceptual approach to in situ generation of advanced epoxy resins for rapid-cure, low-VOC coatings Type de document : texte imprimé Auteurs : Frederick H. Walker, Auteur ; Rob Rasing, Auteur ; Gamini A. Vedage, Auteur ; Michael Cook, Auteur Année de publication : 2009 Article en page(s) : p. 283-313 Note générale : Bibliogr. Langues : Américain (ame) Tags : Poly(N-methylazetidine)  Dimethyl-meta-xylylenediamine  Pseudo-first-order  kinetic  Amine  reactivity  epoxy  curing  agent  Epoxy  resin  coating  Flexibility  Crosslink  density  Miller-Macosko  calculation  Chain  extender  VOC  Low  temperature  cure  Environmental  movement  Electrochemical  impedance  Aine  reaction  mechanism  Mannich  base Index. décimale : 667.9 Revêtements et enduits Résumé : Advanced epoxy resin oligomers have traditionally been utilized for coatings that combine fast dry-to-touch speed and good flexibility--properties demanded in many markets such as marine and industrial maintenance coatings. Unfortunately, advanced epoxy resins require formulation with large quantities of solvent that make attainment of modern VOC regulations difficult or impossible. Coatings formulated from low molecular weight liquid epoxy resin, on the other hand, can easier meet VOC challenges, but dry slowly and tend to be brittle. This presentation explores the concept of using fast reacting, di-functional amine chain extenders to generate epoxy oligomers in situ as a means to meet these opposing property demands. Methylamine-terminated poly-(N-methylazetidine) (pNMAz, 1) is prepared in a two-step process involving the Michael addition of methylamine to acrylonitrile, followed by hydrogenation in a methylamine-containing atmosphere to yield an oligomer stream with an [M.sub.n] of about 250. Competitive pseudo-first-order kinetic measurements conducted in isopropyl alcohol indicate methyl-substituted disecondary diamines reacted approximately 3 to 3.6 times faster with phenyl glycidyl ether (PGE) than the primary amine meta-xylylenediamine (MXDA). These chain extenders can be formulated with traditional multi-functional amine crosslinkers to yield coatings with lower VOC, faster dry speed, and better flexibility compared to corresponding coatings formulated without the chain extender. DOI : 10.1007/s11998-009-9178-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9178-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6111 [article]

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Fundamentals of polymer chemistry : I / Frederick H. Walker in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 912 (01/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 912 (01/2001) . - p. 75-79 Titre : Fundamentals of polymer chemistry : I : Definitions and fundamental concepts Type de document : texte imprimé Auteurs : Frederick H. Walker, Auteur Année de publication : 2001 Article en page(s) : p. 75-79 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polymères Index. décimale : 668.9 Polymères Résumé : This three-part series provides a basic introduction of the fundamentals of modern polymer chemistry. Beginning with the definitions and fundamental concepts discussed in Part I, the series is designed to broaden the understanding of polymer chemistry as utilized by the coatings industry. Part II focuses on a key factor in determining the properties of any polymer -molecular weight. In Part III, phase transitions in polymers, including melting point and glass transition temperature, are discussed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5689 [article]

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Fundamentals of polymer chemistry : Part II / Frederick H. Walker in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 913 (02/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 913 (02/2001) . - p. 125-130 Titre : Fundamentals of polymer chemistry : Part II : Molecular weights of polymers Type de document : texte imprimé Auteurs : Frederick H. Walker, Auteur Année de publication : 2001 Article en page(s) : p. 125-130 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Poids moléculaires Polymères Index. décimale : 668.9 Polymères Résumé : This three-part series provides a basic introduction of the fundamentals of modern polymer chemistry. Beginning with the definitions and fundamental concepts discussed in Part I, the seires is designed to broaden the understanding of polymer chemistry as utilized by the coatings industry. Part II focuses on a key factor in determining the properties of any polymer - molecular weight. In part III, phase transitions in polymers, including melting point and glass transition temperature, are discussed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5753 [article]

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Hybrid vigour / Tae Jun Lim in EUROPEAN COATINGS JOURNAL (ECJ), N° 05/2005 (05/2005)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 05/2005 (05/2005) . - p. 24-30 Titre : Hybrid vigour : Waterborne urethane-acrylics combine high performance with low VOC content Type de document : texte imprimé Auteurs : Tae Jun Lim, Auteur ; Kenneth A. Yoxheimer, Auteur ; Frederick H. Walker, Auteur ; Ernie C. Galgoci, Auteur Année de publication : 2005 Article en page(s) : p. 24-30 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : European Coatings Award 2005 - Urethane-acrylic hybrid polymer dispersions (HPDs) offer an excellent cost/performance balance, but usually have a high content of N-methylpyrrolidone (NMP) solvent. New regulations make it desirable to eliminate this material. However, solvant-free high-performance coating HPDs have now been developed. Novel gemini surfractants reduce their MFFT significantly, creating high-performance coating formulations with volatile organic content (VOC) of less than 100 g/l En ligne : https://drive.google.com/file/d/1w2U62fq68n92welpr1aP-ZFlHOYjKIje/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8888 [article]

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Introduction to polymers and resins / Frederick H. Walker / Blue Bell [Etats-Unis] : Federation of societies for coatings technology (1999) 

Titre : Introduction to polymers and resins Type de document : texte imprimé Auteurs : Frederick H. Walker, Auteur Mention d'édition : 2e édition Editeur : Blue Bell [Etats-Unis] : Federation of societies for coatings technology Année de publication : 1999 Collection : Federation series on coatings technology Importance : 60 p. Présentation : ill. Format : 28 cm Note générale : Voir classeur rouge (côte USUEL 667.9 FED) - Bibliogr. Langues : Américain (ame) Langues originales : Américain (ame) Catégories : Gommes et résines Polymères Index. décimale : 667.9 Revêtements et enduits Note de contenu : I. INTRODUCTION : A. Importance of polymers and resins in paints and coatings - B. Brief history of natural and synthetic polymers II. FUNDAMENTALS OF POLYMER CHEMISTRY : A. Definitions and fundamental concepts - B. Molecular weights of polymers - C. Phase transitions in polymers III. Polymerization processes : A. Step-growth polymerization - B. Chain-growth polymerization - C. Latexes and emulsion polymerization - D. Other polymerization processes IV. THERMOPLASTIC RESINS FOR COATINGS : A. Solventborne lacquers - B. Waterborne thermoplastic coatings V. CROSSLINKED POLYOLS AND RELATED CHEMISTRIES : Acrylic polyols - B. Polyester polyols - C. Amino resin cured polyols - D. Isocyanate crosslinked polyols and related chemistries VI. EPOXY AND PHENOLIC RESINS : A. Structure and preparation of epoxy resins - B. Crosslinking of epoxy resins - C. Phenolic resins - D. Cationic electrodeposition resins VII. FATTY ACIDS, OILS, ALKYD RESINS AND RELATED CHEMISTRIES : A. Fatty acids - B. Autoxidation of fatty acids : the drying proess - C. Modified oils - D. Alkyds resins - E. Modified alkyds and related polymers - F. Epoxy esters VIII. RADICAL CROSSLINKING OF UNSATURATED POLYESTERS AND (METH)ACRYLATES IX. SILICONE RESINS AND CROSSLINKERS X. MISCELLANEOUS CROSSLINKING REACTIONS : A. Acetoacetate crosslinking reactions - B. Michael addition crosslinking reactions - C Polyaziridine crosslinking - D. Polycarbodimide crosslinkers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=264

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Introduction to polymers and resins URL

Solvent-free urethane-acrylic hybrid polymers for coatings / Ernie C. Galgoci in COATINGS TECH, Vol. 2, N° 13 (02/2005)  

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Waterborne acrylic-epoxy coatings / Charles R. Hegedus in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 927 (04/2002)

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