High performance acrylic polymer technology for use in leather finishing processes / J. Hoefler in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 8 (08/2013)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 8 (08/2013) . - p. 311-317 Titre : High performance acrylic polymer technology for use in leather finishing processes Type de document : texte imprimé Auteurs : J. Hoefler, Auteur ; B. Hageman, Auteur ; C. J. Chung, Auteur ; R. Smith, Auteur Année de publication : 2013 Article en page(s) : p. 311-317 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuir d'ameublement Cuir dans les automobiles Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés mécaniques Frottements (mécanique) Liants Polyacryliques Résistance à la salissure Sellerie Usure (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : High performance topcoats designed for automotive and furniture upholstery are generally rich in polyurethane dispersion (PUD)-based binders. This binder technology has been used commercially for years because it offers a distinct combination of high abrasion resistance, flexibility, and tactile performance benefits. However, recent market trends place higher emphasis on performance properties that are challenging for these traditional finishing systems to achieve. Such properties include: dirt pick-up and dye transfer resistance, cleanability after soiling, as well as UV, hydrolytic, and thermal stability. Topcoats featuring acrylic-based binders are increasingly competitive due to intrinsic soiling resistance and stability properties; however, replacing more than approximately 25% of the polyurethane-based resin with acrylic-based resin can result in a noticeable loss in abrasion resistance or toughness. The Dow Chemical Company has developed a novel acrylic binder technology designed to offer many of the same advantages of PUD binders, such as toughness, while retaining the enhanced soiling resistance and stability needed to address the stringent demands of today’s market. This paper describes the performance properties attributed to this new binder technology through a systematic validation process. Note de contenu : - EXPERIMENTAL : Performance topcoat - Anti-soiling topcoat - Summary of the new acrylic technology for the performance topcoat - MATERIALS AND METHODS : Finish and formulations - Process sequence - Tack - Gloss - Bally flexibility - Rub fastness - Wear support - Flexibility - Anti-soiling - Color En ligne : https://drive.google.com/file/d/1H3KmRI16eiDGiqluClAnYvY2vIScr2Dp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19180 [article]

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Improvements in gakushin wear testing through laboratory automation / B. Hageman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 6 (06/2013)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 6 (06/2013) Titre : Improvements in gakushin wear testing through laboratory automation Type de document : texte imprimé Auteurs : B. Hageman, Auteur ; J. Hoefler, Auteur ; J. Gregory, Auteur ; W. Stapelkamp, Auteur Année de publication : 2013 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuir teint Cuirs et peaux -- Propriétés mécaniques Essais accélérés (technologie) Essais accélérés (technologie) -- Appareils et matériels Frottements (mécanique) Solidité de la couleur Usure (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Coatings designed for leather finishes are subjected to ever increasing performance specifications, requiring accurate assessments to properly judge performance. Unfortunately, the results of many tests utilized to determine leather finish performance are plagued by high levels of variability. One such test is the Gakushin wear resistance test, which is required by a number of Japanese auto manufacturers, but can be used more generally to measure wear performance important to most automotive OEMs. Gakushin wear testing also requires intensive operator monitoring over lengthy test cycles and does not present an easily determined endpoint. It is therefore often run unmonitored as a pass/fail test, forfeiting the potential to detect performance gradients among samples. In order to address these challenges, a new system has been developed that preserves the critical components of the wearing system, but adds automation and imaging systems that allow it to run completely unattended. A digital control circuit that periodically interrupts the wearing cycle initiates the capture and storage of high resolution images of the leather samples under test. After the test is completed, the operator is able to view the sequential images, selecting the exact point of coating failure. One benefit of this system is higher productivity, since the test can be run unattended. Also, since the operator is able to evaluate images of the coating both before and after the selected endpoint, the error associated with endpoint detection is minimized and the test yields more precise data than when performed in pass/fail mode. This combination of higher productivity and more precise endpoint detection facilitates the use of statistical data analysis on the results. In addition, the images showing coating wear following the endpoint allow an analysis of failure mode. These factors combine to make the improved Gakushin instrument a potent product development tool for wear resistant topcoats. Note de contenu : - INTRODUCTION : General - Description of gakushin wear test - Advantages and disadvantages of the gakushin test - Gakushin test variability - Instrument automation - EXPERIMENTAL : Automated instrument - VERALAB user interface - VERALAB image player - Leather finishes - Crust preparation - Topcoat - RESULTS AND DISCUSSION : Gakushin testing - JMP analysis - Validation of model - Validation of effects - Coating performance - Comparison of abrasion method En ligne : https://drive.google.com/file/d/1tDiQ3R2L4IrJhwanPAhbCFuRD2o3EGLM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18743 [article]

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Novel acrylic particle technology for high performance leather finishing / J. Hoefler in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 11 (11/2011)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 11 (11/2011) . - p. 316-325 Titre : Novel acrylic particle technology for high performance leather finishing Type de document : texte imprimé Auteurs : J. Hoefler, Auteur ; C. J. Chung, Auteur ; B. Hageman, Auteur ; E. LaFleur, Auteur Année de publication : 2011 Article en page(s) : p. 316-325 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Finition Polyacryliques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The Dow Chemical Company has developed a novel acrylic technology for use in leather finishing formulations. Products making use of this unique technology can deliver low gloss finishes with high optical clarity, soft-touch aesthetics and high physical performance. The key enabler in this technology is an acrylic particle that offers comparable gloss, “jetness” and performance properties to many commercially available inorganic and organic dulling materials. The technology is inherently solvent free, and is compatible with existing acrylic and polyurethane resin components as well as conventional cross-linking chemistries. Note de contenu : - Summary of the new acrylic topcoat technology - EXPERIMENTAL : Comparing organic particles - Finish - Formulation and crust preparation - Appearance - Flexibility - Wear performance - RESULTS AND DISCUSSION : Flexibility - Wear - Resistance En ligne : https://drive.google.com/file/d/1eU-PmphSlyLbPl8c09qiRC1V1ukxF5uS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12520 [article]

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