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Improving the performance of aqueous topcoats - Technical note / Christopher J. Gill in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 6 (06/1993)
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Titre : Improving the performance of aqueous topcoats - Technical note Type de document : texte imprimé Auteurs : Christopher J. Gill, Auteur Année de publication : 1993 Article en page(s) : p. 197-206 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Achieving maximum performance with an aqueous topcoat is the goal of both the chemical supplier and the industrial finisher.Interestingly, each can play a critical role in the success or failure of a topcoat.This is because there are two key elements that directly affect performance: one is the topcoat design and the other is the topcoat application.The topcoat design is typically the responsability of the chemical manufacturer.The industrial finisher entrusts the supplier to carefully design the topcoat.Components of an aqueous topcoat that require optimization are: all aspects of the polymer(s), the coalescent package and the flow package.The chemical supplier, on the other hand, entrusts the finisher to optimize the topcoat application parameters such as: basecoat performance, topcoat film thickness,formulated topcoat co-binders,plating,drying time before testing,temperature of drying and use of crosslinkers. It is the study of these application parameters that may be of most interest to the industrial finisher yet possibly the least quantified by the supplier.In this paper, we explore the effect of each of these application parameters as it applies to one key variable-wet rub resistance.Wet rub is a highly sought after property and is appropriate for study because it is one that has been affected by the industry's switch from solvent to water systems. En ligne : https://drive.google.com/file/d/1JtAElCxh4LHGFv99j5Ds5SCegy-0P9A9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8219
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVIII, N° 6 (06/1993) . - p. 197-206[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006907 - Périodique Bibliothèque principale Documentaires Disponible Low voc topcoats for the leather industry / Christopher J. Gill in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 1 (02/1991)
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Titre : Low voc topcoats for the leather industry Type de document : texte imprimé Auteurs : Christopher J. Gill, Auteur Année de publication : 1991 Article en page(s) : p. 42-48 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : There is an increasing interest in using aqueous topcoats in the leather industry.Topcoats traditionally have been the coating requiring the greatest amount of organic solvent and are therefore primary targets for solvent reduction.Waterborne topcoats offer the tanner several well-known advantages over conventional lacquers and lacquer emulsions,namely ease of clean-up and significantly reduced solvent in the work environment.The adoption,though, of waterborne topcoats into the industry has been slowed by a reluctance to compromise traditional aesthetic standards of solvent-based coatings and by the need to develop familiarity and comfort with pratical aqueous topcoat application.There is no doubt that local and federal pressures to eliminate solvents will continue.
The successful incorporation of water topcoats into the leather industry will require a thorough understanding of the needs of each market segment.Shoes,accessories,furniture upholstery,garment and automotive leather all have different needs.This paper will address the performance and aesthetic requirements of each market, the finishing systems currently used and those that are evolving,the application variations and approaches to overcoming problems inherent in aqueous systems.En ligne : https://drive.google.com/file/d/1BRRA50U7j_RwlfjD266R7tXBq4QUKBwc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8586
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 1 (02/1991) . - p. 42-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006877 - Périodique Bibliothèque principale Documentaires Disponible New acrylic technologies in leather finishing / Christopher J. Gill in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), LXXXVII, N° 3 (03/1992)
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Titre : New acrylic technologies in leather finishing Type de document : texte imprimé Auteurs : Christopher J. Gill, Auteur Année de publication : 1992 Article en page(s) : p. 82-87 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Acrylic polymers have gone through a technological evolution over the past 10 years. Historically, first generation acrylics have found a natural application as basecoat binders because of their excellent adhesion, molding and natural appearance. But, these acrylics, despite their strengths, tended to be tacky in soft finishes and usually required drying additives. Second generation acrylics were designed to eliminate room temperature tack, thus assisting in piling and preventing dirt pick-up, but often required plating coats to improve plate release.
Thirdgeneration acrylics now use a new technology that allows them to be low in tack at both room temperature and at plating temperatures, without compromising molding or adhesion.
Today, we see available to the finisher a wide array of low VOC acrylic technologies, gaining access to markets on performance not just low cost. Such acrylics rae being used in a number of new applications: plating coats, automotive finishes, high-flex basecoats for splits and highly water resistant finishes.En ligne : https://drive.google.com/file/d/1vqLu9ptxWao_0CJGJsSLQX8ldgg1HTgI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8320
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > LXXXVII, N° 3 (03/1992) . - p. 82-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006891 - Périodique Bibliothèque principale Documentaires Disponible A new acryllic technology for finishing soft leathers / Christopher J. Gill in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 12 (12/1992)
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Titre : A new acryllic technology for finishing soft leathers Type de document : texte imprimé Auteurs : Christopher J. Gill, Auteur Année de publication : 1992 Article en page(s) : p. 473-480 Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A new acrylic technology is now capable of delivering polymers that have very low stiffness yet are tough and low tack. Consequently, leather finished with these basecoat polymers maintain a soft hand. This is an important development because the leather industry is showing an increasing demand for soft leathers. Clearly, soft leathers must begin with the appropriate retan/fatliquoring to deliver the desired temper out of the crust. But for those leathers that are finished, and most are, there is increasing pressure to maintain the crust softness. This calls for finishes that do not firm the leather but at the same time are not tacky. Because this new technology produces acrylates that are low tack, basecoats exhibit excellent plate release and processability, in addition they mold exceptionally well when embossed. End-use application of a polymer with such performance characteristics appears to almost universal. Leather with the greatest finish add-on (splits an auto upholstrery) exhibit the highest level of temper control vs. standard finishes. However, commercial acceptances in furniture upholstery, garment leather and side leather for shoes and accessories have demonstrated widespread utility of this technology.
This technology will be referred to as "SB" technology and currently has applications only for basecoats. The goal of this paper is to describe the unique features of such a polymer technology, relative to both traditional acrylics as well as polyurethane dispersions (PUds), and to explore the market opportunitiesEn ligne : https://drive.google.com/file/d/1NlN2WyNYJyKOozjh309ltjc1KmksC0x_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8256
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVII, N° 12 (12/1992) . - p. 473-480[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006900 - Périodique Bibliothèque principale Documentaires Disponible