Corrosion inhibitors for maintenance and light duty applications : waterborne alkyds / Tony Gichuhi in PAINTINDIA, Vol. LXI, N° 6 (06/2011)

[article]  inPAINTINDIA > Vol. LXI, N° 6 (06/2011) . - p. 69-75 Titre : Corrosion inhibitors for maintenance and light duty applications : waterborne alkyds Type de document : texte imprimé Auteurs : Tony Gichuhi, Auteur Année de publication : 2011 Article en page(s) : p. 69-75 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Dilution Dispersions et suspensions Epoxydes Esters Polyalkydes Revêtements en phase aqueuse:Peinture en phase aqueuse Triéthylamine Index. décimale : 667.9 Revêtements et enduits Résumé : For several years now wateborne coatings have gained acceptance as alternatives to solventborne coatings. For light duty and industrial maintenance coatings for metal, water reducible alkyds and water dispersible alkyds are acceptable alternatives to solvent-based alkyds. Water-dispersible alkyds are made dispersible by neutralizing the acid moieties of the alkyd with ammonia or water soluble amines such as triehylamine. Water reducible and dispersible alkyds (to a lesser extent) are susceptible to hydrolysis and furthermore destabilization by basic multivalent cations such as those found in corrosion inhibiting pigments. The hydrolytic instability translates to limited storage time. This paper highlights research to develop corrosion inhibitors for both types of waterborne alkyds and adresses strategies to overcome stability problems inherent in these systems. Note de contenu : - General comparison of water reducible & water dispersible alkyds - Corrosion comparison of waterborne alkyds - Corrosion inhibitors in water reducible epoxy ester (WREE) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11850 [article]

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Interfacial composition and structural parameters of aqueous NaCl(HCl/NaOH)/CnmimBr/1-pentanol/n-octane microemulsions / L. Xu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 6 (11-12/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 6 (11-12/2011) . - p. 459-465 Titre : Interfacial composition and structural parameters of aqueous NaCl(HCl/NaOH)/CnmimBr/1-pentanol/n-octane microemulsions Type de document : texte imprimé Auteurs : L. Xu, Auteur ; J.-L. Chai, Auteur ; W. Liu, Auteur ; S. S. Shang, Auteur ; J.-J. Lu, Auteur Année de publication : 2011 Article en page(s) : p. 459-465 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie des surfaces Dilution Liquides ioniques Microémulsions Surfactants Index. décimale : 668.5 Parfums et cosmétiques Résumé : The interfacial composition, thermodynamic properties and structure parameters of the W/O microemulsion systems containing alkyl-3-methyl imidazolium bromide (CnmimBr, n = 12, 14, 16)/1-pentanol/n-octane/aqueous NaCl (HCl or NaOH) have been studied by a dilution method. The molar solubility of 1-pentanol in oil phase (X0a) and the molar fraction of 1-pentanol at the interfacial layer (Xia) were obtained from the dilution equation of the W/O microemulsions. Furthermore, the distribution constant K of 1-pentanol between the interfacial layer and the bulk oil phase was determined, along with the standard Gibbs’ free energy change of transferring alcohol from the continuous oil phase to the interfacial layer, –ΔG00 -> i. Some structure parameters related to the microemulsion droplets were also calculated. The effects of NaCl, HCl and NaOH on the properties and structures of the W/O microemulsions were also explored. It was found that as the content of the aqueous NaCl (HCl and NaOH) increases, X0a and Xia would decrease, the formation of the microemulsion would be more thermodynamically spontaneous, and the radius of the water pool significantly increases. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12614 [article]

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Is the EU Ecolabel DID List a Useful Environmental Evaluation Tool for Detergent-like Consumer Products ? / L. Nitschke in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 3/2007 (06-07/2007)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 3/2007 (06-07/2007) . - p. 155-159 Titre : Is the EU Ecolabel DID List a Useful Environmental Evaluation Tool for Detergent-like Consumer Products ? Type de document : texte imprimé Auteurs : L. Nitschke, Auteur ; I. Malcomber, Auteur ; C. Tibazarwa, Auteur ; J. Steber, Auteur Année de publication : 2007 Article en page(s) : p. 155-159 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Détergents Dilution Environnement -- Etudes d'impact Etiquetage écologique Tags : Ecolabel  Detergent  ingredients  database  Critical  dilution  volume Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : For comparing the environmental relevance of household and personal care products, the Critical Dilution Volume (CDV) originally developed for the EU Ecolabel of detergents is an often used key criterion. The EU Ecolabel Detergents Ingredient Database (DID) is a publicly available information basis for derivation of product CDV by providing data on key descriptors for the environmental fate and effects of chemical substances used in consumer products. The alterations of the CDV-relevant descriptors in the revised DID list (2004) have led, in many cases, to an unrealistic depiction of the environmental behaviour of product ingredients and to inadequate product evaluations. The paper reports on the framework of and the experiences with a novel DID list developed by an expert group of the German Hauptausschuss Detergentien (HAD) enabling an environmentally more realistic comparison of products. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3215 [article]

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Microstructure design of CTAC:FA and BTAC:FA lamellar gels for optimized rheological performance utilizing automated formulation platform / A. R. Davies in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 3 (06/2020)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 3 (06/2020) . - p. 259-269 Titre : Microstructure design of CTAC:FA and BTAC:FA lamellar gels for optimized rheological performance utilizing automated formulation platform Type de document : document électronique Auteurs : A. R. Davies, Auteur ; S. Amin, Auteur Année de publication : 2020 Article en page(s) : p. 259-269 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcools gras Automatisation Cheveux -- Soins et hygiène Chlorure de behentrimonium Chlorure de cétrimonium Composés lamellaires Dilution Elasticité Formulation (Génie chimique) Gels -- Emploi en cosmétologie Micelles Produits après-shampooings Rhéologie Surfactants Systèmes auto-assemblés Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objectives : The main objective of this paper was to optimize hair conditioner performance through variation of composition utilizing automated cosmetic formulation platform and advanced characterization techniques as well as develop understanding of how performance (wet combing and wet lubrication) of hair conditioner is affected by its rheology (i.e. yield stress) and controlled breakdown of the formulations (dilution). The experimental results show that yield stress greatly impacts rheology, stability and performance of the lamellar gels for hair conditioning. - Methods : All samples were prepared on the Chemspeed Flex Formax. A mechanical rheometer was used to measure bulk viscosity and yield stress in each sample. Dia-stron tensile tester was used to measure the lamellar gels ability to reduce combing force. Potential stronger lamellar gel network formation in the formed lamellar gels potentially leads to higher yield stress exhibited. Viscosity values were also measured after a controlled breakdown (i.e. dilution) of each sample. This was also carried out using a mechanical rheometer. - Results : Yield stress of the formulations was engineered through composition variation and was recorded in each system. The highest yield stress value is 251.179 Pa at a BTAC/CA ratio of 6:10, and the lowest yield stress is 50.14 Pa at a BTAC/CA ratio of 6:5. The highest yield stress value is 50.14 Pa at a CTAC/CA ratio of 6:10, and the lowest yield stress is 19.98 Pa at a CTAC/CA ratio of 2:10. The highest overall yield stress values can also be observed in the BTAC/CA system, whereas the CTAC/CA system has relatively lower yield stress values. Dilution of each formulation caused a breakdown in viscosity of each formulation with the formulations with highest yield stress maintaining higher viscosity than the other formulations. The formulations with highest yield stress in each system which also maintains the highest dilution viscosity (6% BTAC/10% CA and 6% CTAC/10% CA) have the best effect on reducing overall combing force, that is from dry hair tress to wet hair tress and after product is rinsed off. At a BTAC/CA system of ratio 6:5, there is an 89% reduction in combing force and a 95% reduction in combing force in the BTAC/CA system of ratio 6:10. At a CTAC/CA system of ratio 2:10, there is a 65% reduction in combing force and a 88% reduction in combing force in the CTAC/CA system of ratio 6:10. A ‘conditioned’ soft feel was observed on each hair tress as the sample was applied and after it was rinsed off. - Conclusions : The overall performance of the lamellar gels for hair conditioning can be engineered through optimization of the formulation microstructure and formulation microstructure breakdown on dilution. Note de contenu : - Objectives : The main objective of this paper was to optimize hair conditioner performance through variation of composition utilizing automated cosmetic formulation platform and advanced characterization techniques as well as develop understanding of how performance (wet combing and wet lubrication) of hair conditioner is affected by its rheology (i.e. yield stress) and controlled breakdown of the formulations (dilution). The experimental results show that yield stress greatly impacts rheology, stability and performance of the lamellar gels for hair conditioning. - Methods : All samples were prepared on the Chemspeed Flex Formax. A mechanical rheometer was used to measure bulk viscosity and yield stress in each sample. Dia-stron tensile tester was used to measure the lamellar gels ability to reduce combing force. Potential stronger lamellar gel network formation in the formed lamellar gels potentially leads to higher yield stress exhibited. Viscosity values were also measured after a controlled breakdown (i.e. dilution) of each sample. This was also carried out using a mechanical rheometer. - Results : Yield stress of the formulations was engineered through composition variation and was recorded in each system. The highest yield stress value is 251.179 Pa at a BTAC/CA ratio of 6:10, and the lowest yield stress is 50.14 Pa at a BTAC/CA ratio of 6:5. The highest yield stress value is 50.14 Pa at a CTAC/CA ratio of 6:10, and the lowest yield stress is 19.98 Pa at a CTAC/CA ratio of 2:10. The highest overall yield stress values can also be observed in the BTAC/CA system, whereas the CTAC/CA system has relatively lower yield stress values. Dilution of each formulation caused a breakdown in viscosity of each formulation with the formulations with highest yield stress maintaining higher viscosity than the other formulations. The formulations with highest yield stress in each system which also maintains the highest dilution viscosity (6% BTAC/10% CA and 6% CTAC/10% CA) have the best effect on reducing overall combing force, that is from dry hair tress to wet hair tress and after product is rinsed off. At a BTAC/CA system of ratio 6:5, there is an 89% reduction in combing force and a 95% reduction in combing force in the BTAC/CA system of ratio 6:10. At a CTAC/CA system of ratio 2:10, there is a 65% reduction in combing force and a 88% reduction in combing force in the CTAC/CA system of ratio 6:10. A ‘conditioned’ soft feel was observed on each hair tress as the sample was applied and after it was rinsed off. - Conclusions : The overall performance of the lamellar gels for hair conditioning can be engineered through optimization of the formulation microstructure and formulation microstructure breakdown on dilution. DOI : https://doi.org/10.1111/ics.12609 En ligne : https://drive.google.com/file/d/1eCms_kWzscE6oPauostB7q8_J8tKKwBu/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35273 [article]

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Powerful pumps for viscous materials / J. Wagner in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 11, N° 1 (2018)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 11, N° 1 (2018) . - p. 22-23 Titre : Powerful pumps for viscous materials Type de document : texte imprimé Auteurs : J. Wagner, Auteur Année de publication : 2018 Article en page(s) : p. 22-23 Langues : Anglais (eng) Catégories : Anticorrosion Dilution Haut extrait sec Hélices marines Pompes Revêtements -- Appareils et matériels:Peinture -- Appareils et matériels Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : The maintenance measures needed in the infrastructure sector and the demand for heavy-duty corrosion protection are constantly increasing. Powerful, reliable application systems and equipment are needed for protective coatings based on extremely viscous high-solids paints. Note de contenu : - Problems caused by inadequate pumps - Thinning high-solids paints puts the warranty at risk - Automatic mixing guarantees the correct composition - Stainless steel pump parts allow for a wider range of applications - Powerful pumps with high ratios - Ease of use - Investment in new technology versus high repair costs - Fig. 1 : Ships' propellers are exposed to extreme stressees. The materials used to coat them require a high-performance mixing and dosing system - Fig. 2 : This two-component system has been specially designed for the application of high-solids paints for heavy-duty corrosion protection Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30308 [article]

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Structure development in polyurethane networks based on star-like precursors / P. Vlasak in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 3 (09/2007)  

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Synthesis of four-component acrylic-modified water-reducible alkyd resin : investigation of dilution ratio effect on film properties and thermal behaviors / Özge Naz Büyükyonga in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)  

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The odor of leather / Michaela Schröpfer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 3 (03/2013)  

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Thickening by thinning - A novel liquid rheology additive for selvent-based and solvent-free coatings / Janos Hajas in PAINTINDIA, Vol. XLVII, N° 10 (10/1997)

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