Cross-linked polymers to provide better properties in leather finishing / Jon Bouchard in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXII (Année 1987) . - p. 323-330 Titre : Cross-linked polymers to provide better properties in leather finishing Type de document : texte imprimé Auteurs : Jon Bouchard, Auteur ; Mortimer Greif, Auteur Année de publication : 1987 Article en page(s) : p. 323-330 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The physical properties of a polymer system are dependent upon the molecular weight of the polymer. In the coatings industry, reactive systems are employed to provide cross-linking to achieve the performance level being sought. In leather finishing, the times and temperatures are generally insufficient to obtain significant cross-linking without having pot life problems. In this paper, the entire subject will be reviewed and existing approaches along with systems will be described. En ligne : https://drive.google.com/file/d/1fp1quBzSMJwJLCksLLHhyzatHJTL7F3d/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9045 [article]

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Urethanes in leather finishing / Jon Bouchard in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 280-289 Titre : Urethanes in leather finishing Type de document : texte imprimé Auteurs : Jon Bouchard, Auteur Année de publication : 1978 Article en page(s) : p. 280-289 Langues : Américain (ame) Catégories : Cuirs et peaux -- Finition Isocyanates Polymères -- Propriétés physiques Polymérisation Polymérisation en émulsion Polyuréthanes Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Urethanes achieved commercial importance in the 1950's. Since that time, their growth has been phenomenal. Last year 5.3 billion pounds of isocyanates alone were used, and by 1983 the figure is expected to reach 8 billion pounds. The first use of urethanes in the leather industry was in the early 1960's when they replaced linseed oil as the patent leather topcoat. Today, urethanes are being tailor-made to solve a variety of leather finish problems. These new developments are expected to lead to increased volumes of urethanes in leather finishes. Note de contenu : - General chemistry - Primary isocyanate reactions : Amines - Water - Carboxylic acide - Substituted ureas - Urethane - Amides - Isocyanate polymerization : Dimerization - trimerization - Reaction rates and polymerization : Reactivity - Polymerization - Types of isocyanates ande alcohols : Isocyanates - Diols and polyols - Prepolymer types : Prepolymer - Fully reacted urethanes - Uretanes emulsions - Reactive urethanes - Table 1 : Physical properties of urethanes versus nitrocellulose lacquers En ligne : https://drive.google.com/file/d/1RCVW8UJCbFUTTXCNmuT1mx9VBq8Gr6gl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41153 [article]

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