Challenge testing of preservation systems / Malte Sietzen in GLOBAL PERSONAL CARE, Vol. 23, N° 7 (07/2022)  

[article]  inGLOBAL PERSONAL CARE > Vol. 23, N° 7 (07/2022) . - p. 48-50 Titre : Challenge testing of preservation systems Type de document : texte imprimé Auteurs : Malte Sietzen, Auteur ; Nargiza Cakir, Auteur ; Fernando Ibarra, Auteur Année de publication : 2022 Article en page(s) : p. 48-50 Langues : Anglais (eng) Catégories : Conservateurs (chimie) Lévulinates Sécurité des produits de consommation Tests d'efficacité Tests microbiologiques Index. décimale : 668.5 Parfums et cosmétiques Résumé : Preservation efficacy testing, or challenge testing, has for many been a vital tool in judging a personal care product’s safety and is a requirement for EU market access. Here, evident ingredients explains why meta analysis is a powerful tool in understanding and predicting challenge test results. Note de contenu : - Bringing order to the chaos of data - Meta-analysis based on formulation types and pH ranges En ligne : https://drive.google.com/file/d/16TW4EM2JhJ7CaPtWaGA32iMgVOsE7B8D/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38203 [article]

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Technical highlights from the 2022 American Coatings Conference / Leo J. Procopio in COATINGS TECH, Vol. 19, N° 5 (05-06/2022)  

[article]  inCOATINGS TECH > Vol. 19, N° 5 (05-06/2022) . - p. 16-23 Titre : Technical highlights from the 2022 American Coatings Conference Type de document : texte imprimé Auteurs : Leo J. Procopio, Auteur Année de publication : 2022 Article en page(s) : p. 16-23 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents coalescents Composés amphiphiles Dioxyde de titane Ester de phosphate Esters de glycidyle Lévulinates Lignine La lignine est un des principaux composants du bois, avec la cellulose, l'hémicellulose et des matières extractibles. La lignine est présente principalement dans les plantes vasculaires et dans quelques algues. Ses principales fonctions sont d'apporter de la rigidité, une imperméabilité à l'eau et une grande résistance à la décomposition. Toutes les plantes vasculaires, ligneuses et herbacées, fabriquent de la lignine. Quantitativement, la teneur en lignine est de 3 à 5 % dans les feuilles, 5 à 20 % dans les tiges herbacées, 15 à 35 % dans les tiges ligneuses. Elle est moindre pour les plantes annuelles que pour les vivaces, elle est maximum chez les arbres. La lignine est principalement localisée entre les cellules (voir parois pectocellulosiques), mais on en trouve une quantité significative à l'intérieur même de celles-ci. Bien que la lignine soit un réseau tridimensionnel hydrophobe complexe, l'unité de base se résume essentiellement à une unité de phénylpropane. La lignine est le deuxième biopolymère renouvelable le plus abondant sur la Terre, après la cellulose, et, à elles deux, elles cumulent plus de 70 % de la biomasse totale. C'est pourquoi elle fait l'objet de recherches en vue de valorisations autres que ses utilisations actuelles en bois d'Å“uvre et en combustible. Voie de biosynthèse : La lignine est une molécule dont le précurseur est la phénylalanine. Cet acide aminé va subir une cascade de réactions faisant intervenir une dizaine de familles d'enzymes différentes afin de former des monolignols. Ces enzymes sont : phénylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate:CoA ligase (4CL), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), caffeoyl-CoA o-methyltransferase (CCoAOMT), cinnamoyl-CoA reductase (CCR), ferrulate 5-hydroxylase (F5H), caffeic acid O-methyltransferase (COMT) et cinnamyl alcohol deshydrogenase (CAD). Dans un certain nombre de cas, des aldéhydes peuvent également être incorporés dans le polymère. Matériaux -- Propriétés fonctionnelles Nanotubes Piégeur de formaldéhyde Polymères -- Détérioration Revêtements (produits chimiques) Revêtements (produits chimiques):Peinture (produits chimiques) Revêtements -- Additifs Revêtements organiques Virucides Index. décimale : 667.9 Revêtements et enduits Résumé : The entire North American paint and coatings industry met in person for the first time in four years during the American Coatings Show and Conference, held in Indianapolis April 5–7. The last in-person exhibit and conference were held in 2018—two years prior to the COVID-19 pandemic. By all accounts, the 2022 conference and exhibit were overwhelming successes. People in the industry have been missing the in-person interaction for more than two years due to pandemic-related restrictions and were ready to get together to discuss all things concerning paint and coating. The American Coatings Conference consisted of nearly 760 attendees, all engaging in 90 presentations describing the latest advances in coatings technology. This article includes technical highlights from many of the sessions, which were held concurrently in four tracks. Further details can be found in the papers available in the proceedings of the conference. Some papers will also be published in future issues of CoatingsTech after peer review. The papers highlighted in this article will be presented according to some overarching themes that they addressed : Sustainability, Functional Coatings, Paint Fundamentals, and Additive Technologies. These brief summaries will hopefully serve to interest the reader to seek out the full papers and learn more about the thought-provoking topics presented during the conference. Note de contenu : - SUSTAINABILITY : The use of levulinates as coalescing agents in water-based coatings - Lignin as a raw material for production of biobased resins - Aliphatic glycidyl ethers as crosslinkers for high-performance NISO coatings - Improving the odds of success using a benign-by-design approach to product development - FUNCTIONAL COATINGS : Creating functinal coatings with formaldehyde-scavenging additives - The use of single-walled carbon nanotubes in coatings colorants - Key considerations for functional virucidal paints - PAINT FUNDAMENTALS : Separating the effects of TiO2 dispersion and photoactivity on paint durability - Improving application experience and applied hide for professional paints via additives optimization - ADDITIVE TECHNOLOGIES : reactive epoxy emulsifier for high-performance waterborne epoxy coatings - Improving water resistance of water-based coatings using reactive surfactants - Fluoro-free and silicone-free blocking resistance additives for waterborne coatings - Fig. 1 : Structures of levulinic acid and derivatives - Fig. 2 : Aliphatic tetrafunctional glycidyl ether based on the epoxidation of sorbitol - Fig. 3 : Reactions of formaldehyde scavenger tris(hydroxymethyl)aminomethane with formaldehyde to form mono- and bis-oxazolidines - Fig. 4 : Reaction pathways leading to the degradation of polymer in a coating. TiO2 *signifies TiO2 in an excited electronic state - Fig. 5 : General structure of amphiphilic phosphate esters and reaction scheme showing their synthesis from alcohols En ligne : https://drive.google.com/file/d/12b3ve5O2irEaTk0-Wue90XrdScFIAtWS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37861 [article]

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The use of levulinates as coalescing agents in water-based coatings / Steve Block in SURFACE COATINGS INTERNATIONAL, Vol. 105.1 (01-02/2022)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 105.1 (01-02/2022) . - p. 48-51 Titre : The use of levulinates as coalescing agents in water-based coatings Type de document : texte imprimé Auteurs : Steve Block, Auteur Année de publication : 2022 Article en page(s) : p. 48-51 Langues : Anglais (eng) Catégories : Agents coalescents Coalescence (Sciences physiques) Lévulinates Revêtements en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : The need to develop and implement affordable and sustainable large-scale operations for the conversion of renewable resources to chemical building blocks is becoming increasingly urgent and essential in reducing global dependence on fossil fuels, including the critical aspect of minimising our carbon footprint. NXTLEVVEL Biochem has successfully implemented commercial scale manufacturing of second-generation biomass-derived chemicals, with navel technologies in bio-solvents based on the conversion of biomass to derivatives of levulinic acid, originally developed by GFBiochemicals. Products that are now commercially available include ethyl levulinate (NXT SOLV 100), butyl levulinate (NXT SOLV 200), levulinate propanediol ketal (NXT SOLV 300) and levulinate glycerol ketal (NXT SOLV 400). Levulinic acid derivatives are considered key technologies for moving towards petrochemical-free chemistry, but commercial-scale production has long been hampered by the chicken and egg story between capital investment and market demand. Produced from agricultural waste, derivatives of levulinic acid such as butyl levulinate and ethyl levulinate propanediol ketal can be used as sustainable alternatives to materials such as 2,2,4-trimethy1-1,3-pentanediol monoisobutyrate (Eastman Texanor), 2,2-dimethy1-1-(methylethyl)-1,3- propanediylbis(2-methylpropanoate) (Eastman Optifilm°°' Enhancer 400) and triethylene glycol bis(2-ethylhexanoate) (Dowanor DPnB). Note de contenu : - The technology - The four pillars - Application testing - Responding to the market - Health, safety and environmental impact - Table 1 : Properties of coalescing agents - Table 2 : Comparative performance of coalescing agents in Neocryl A-6099 - Table 3 : Comparative performance of coalescing agents in Zeffle SE-310 - Table 4 : Comparative performance of coalescing agents in Neocryl XK 170 - Table 5 : Health and environmental profile of coalescing agents En ligne : https://drive.google.com/file/d/1v9ABymW_wZoWjGc940ZYZnb4Vu6QcGdc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37057 [article]

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The use of levulinates as coalescing agents in water-based coatings / Steve Block in COATINGS TECH, Vol. 19, N° 5 (05-06/2022)  

[article]  inCOATINGS TECH > Vol. 19, N° 5 (05-06/2022) . - p. 24-29 Titre : The use of levulinates as coalescing agents in water-based coatings Type de document : texte imprimé Auteurs : Steve Block, Auteur Année de publication : 2022 Article en page(s) : p. 24-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents coalescents Composés organiques -- Synthèse Essais (technologie) Lévulinates Revêtements en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : The need to develop and implement affordable and sustainable large-scale operations for the conversion of renewable resources to chemical building blocks is becoming increasingly urgent and essential in reducing global dependence on fossil fuels, including the critical aspect of minimizing the carbon footprint of the chemical industry. Commercial-scale manufacturing of second-generation biomass-derived chemicals has been implemented. It demonstrates novel technologies in bio-solvents based on the conversion of biomass to derivatives of levulinic acid. Products that are now commercially available include ethyl levulinate, butyl levulinate, levulinate propanediol ketal, and levulinate glycerol ketal. Levulinic acid derivatives are considered key technologies for moving toward petrochemical-free chemistry, but commercial-scale production has long been hampered by the chickenand-egg story between capital investment and market demand. Produced from agricultural waste, derivatives of levulinic acid, such as butyl levulinate and ethyl levulinate propanediol ketal, can be used as sustainable alternatives to materials such as 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 2,2-dimethyl-1-(methylethyl)-1,3-propanediyl bis(2-methylpropanoate), and triethylene glycol bis(2-ethylhexanoate). A comparison of the key properties of these coalescing agents are shown in Table 1. The demonstrated performance of these levulinic acid derivatives, along with the resultant lower-use level in many resin systems, address industry needs to reach targeted cost-performance criteria with sustainable chemistry. Their limited water solubility assists in demonstrating a high level of effectiveness in lowering the MFFT as well as frequently enhancing properties of the film, notably the hardness. Levulinates have an excellent health, safety, and environmental profile and contain up to 100% biobased carbon, aiding their position to replace traditional petrochemical coalescing agents. This article will provide a detailed discussion of the technology, application case studies, and environmental impacts of this technology. Note de contenu : - The technology - The four pillars - Application testing - Responding to the market - Health, safety, and environmental impact - Table 1 : Properties of coalescing agents - Table 2 : Comparative performance of coalescing agents in Neocryl A-6099 - Table 3 : Comparative performance of coalescing agents in Zffle SE-310 - Table 4 : Comparative performance of coalescing agents in Neocryl XK 170 - Table 5 : Health and environmental profile of coalescing agents in the study - Fig. 1 : DOE TOP 12 renewable chemicals - Fig. 2 : Levulinic acid derivates process flow diagram - Fig. 3 : Synthesis of levulinate propanediol ketal - Fig. 4 : Comparative performance of coalescing agents in Neocryl XK 170 En ligne : https://drive.google.com/file/d/1FMA6MjL7Ucf8Qv_zSVgNbp7i_u2HmZVW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37862 [article]

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