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APE-free phosphate surfactants in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4522 (03/2008)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4522 (03/2008) . - p. 22-26 Titre : APE-free phosphate surfactants Type de document : texte imprimé Année de publication : 2008 Article en page(s) : p. 22-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents mouillants Copolymère styrène acrylique Dispersions et suspensions Ester de phosphate Formulation (Génie chimique) Latex Polyacryliques Revêtements -- Additifs:Peinture -- Additifs Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : Phosphate ester surfactants have been widely used as primary anionic emulsifiers for emulsion polymerisation for many years. We are unaware of any published data related to phosphate ester product to effectiveness in latex syntheses. The introduction of this type of surfactant into paint formulation as a wetting and dispersing agent significantly enhance the overhall paint performance on gloss, colour acceptance and stain removal performance. Certain phosphate esters in low VOC formulations can replace glycols and other volatile reagents to improve open time, freeze-thaw and heat stability. The work described in this paper was undertaken to provide a framework for the use of this type of surfactant in pure-acrylic, styrene-acrylic latex synthesis. The overhall performance of phosphate ester surfactant in paint formulation is presented. The APE free Rhodafac employed in this study are complex phosphate ester of polyoxyethylene nonionic surfactants. They are mixtures of both mono- and diesters of the following generic structures. Phosphates ester surfactants are produced acid derivatives. Tipically, the commercial phosphate ester surfactant products are a mixture of monoester, diester and unreacted alcohols and phosphorics acids. Unreacted phosphoric acids are normally present as impurities. Typîcal levels of residual acids are given in. Rhodia's phosphation technology could produce products with superior mono / di alkyl phosphate (MAP/DAP) ratios and lower phosphoric acid content. Note de contenu : - EXPERIMENTAL : latex synthesis recipes and procedures - Salt solutions of Rhodafac surfactant - Latex properties - Paint formulation - RESULTS AND DISCUSSION : Phosphate ester surfactant in EP - Phosphate ester surfactant in paint application En ligne : https://drive.google.com/file/d/1gqnlVO8945uNOAX1NN_W8aJ5rCHppSDx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27219 [article]

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Corrosion correctors / Martin Gerlitz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4522 (03/2008)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4522 (03/2008) . - p. 28-30 Titre : Corrosion correctors Type de document : texte imprimé Auteurs : Martin Gerlitz, Auteur Année de publication : 2008 Article en page(s) : p. 28-30 Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Haut extrait sec Réduction des composés organiques volatils Réticulants Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : The author explains the increased amount of environmental legislation impacting on anti-corrosion coatings. Since the early days of epoxy chemistry, traditionaly type 1 / polyamidoamine systems have dominated the field of corrosion protection. A range of characteristics including tolerant mixing ratio, extremely long pot life, enhanced mechanical properties and relatively short drying times plus excellent corrosion prperties, has ensured the continued success of this solvent-based coating solution. However, increased legislative pressure surrounding the use of Volatile Organic Compounds (VOC) is driving forward significant changes in the global coatings industry. Formulators are being urged to reduce the use of solvents in coatig solutions to help minimise detrimental effects on the environment and human health. National authorities, especially in Europe and North America have established several solvent reduction programmes to ensure applicators reduce VOCs in their coating products (EU Directive 1993/12 and 2002/42; SCADQMD (South Coast Air Quality Management Discrit)) regulations for wood, metal and architectural coatings. Private companies and industry groups have also agreed to reduce VOC output by setting limits for production lines and evaluating alternative environmentally friendly technologies including power coatings and high solid coatings. These changes are impacting on heavy duty, marine, automotive, aerospace and architecture markets where 'green' solutions are becoming the technologies of choice, replacing traditional solventborne products such as the traditional type 1 / polyamidoamine systems. An alternative option for coating formulators looking to reduce the use of VOC whitout compromising the level of corrosion protection provided is high solid systels. These are typically defined as a solution with a solid volume content grater than 60%. The reduction in solvent content in high solid coatings results in a higher thickness and viscosity, which can cause issued with spray coating applications. Therefore, for formulators to reach lower lovels of VOC and still have a fluid coating system, a lower viscous resin adn/or hardener is required. Here the resin and hardener options available for coating formulators looking to specify high solid, VOC-free coating systems and retain all the performance and application requirements for corrosion protection applications, are discussed. Note de contenu : - Resin component in high solid systems - Hardener component in high solid systems En ligne : https://drive.google.com/file/d/15bz7bImV82TkM5bU6PVSrwqY_0ZYQywL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27220 [article]

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Improving environmental compliance and safety / Robert O. Walton in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4522 (03/2008)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4522 (03/2008) . - p. 31 Titre : Improving environmental compliance and safety Type de document : texte imprimé Auteurs : Robert O. Walton, Auteur Année de publication : 2008 Article en page(s) : p. 31 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Historically, companies have used a variety of hazardous chemicals to clean anything from production equipment to floors. These chemicals, mosrly petroleum-based, have worked well but in today's world of growing environmental sensitivity, businesses are being forced by stakeholders and governments to seek environmentally sensitive alternatives. Over the last few years, environmentally friendly alternatives have been available on the market but have not been widely accepted by industru. Reasons generally given for this lack of acceptance, centre around the argument of price and/or performance but in reality it is because industry has not had a reason to switch.. This is starting to change as governments start to move towards stricter rules on the use of hazardous chemicals, as is being seen by the implementation in the EU of REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) which came into force on June 1, 2007. REACH calls for the progressive substitution of the most dangerous chemicals when suitable alternatives have been identified. In general, the registration, evaluation and authorisation process in expected to take many years, but it will force companies to seek out and use more environmentally friendly chemicals. Additionally, the National Safety Council reports that almost 46% of chemical burns occur while workers are cleaning equipment, tools or vehicles, even though personal protective equipment is required when handling hazardous chemicals. Note de contenu : - FRIENDLY SOLVENTS - BIO-SOLVENT REDUCES VOCS En ligne : https://drive.google.com/file/d/1Iqky6tY1IyAD3fvUwUqdG065Wasu0qww/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27221 [article]

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Breaking with convention / Joanne Mitchell in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4522 (03/2008)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4522 (03/2008) . - p. 19-20 Titre : Breaking with convention Type de document : texte imprimé Auteurs : Joanne Mitchell, Auteur Année de publication : 2008 Article en page(s) : p. 19-20 Langues : Anglais (eng) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite. L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement. L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium. Dépôt en phase vapeur Formulation (Génie chimique) Pigments métalliques Réflectance Revêtements en phase aqueuse:Peinture en phase aqueuse Vide (technologie) Index. décimale : 667.2 Colorants et pigments Résumé : The author describes how using vacuum metallised pigments provide a spectacular finish in a variety of applications. Vacuum-metallised pigments (VMPs) are the latest addition to the aluminium pigment portfolio. Although still fairly new, they are gaining wide acceptance and being used increasingly in numerous different types of coating. VMPs are manufactured by a process that involves the deposition of aluminium to a given thickness on a polyester web carrier. These pigments are quite different from the conventional ball-milled 'cornflake' and 'silver dollar' aluminium types : they utilise a polymer surface chemistry, whereas conventional types use fatty acids. The flakes are typically five to ten times thinner than those of ball-milled types. They have an exceptionally smooth surface that ensures maximum light reflection and they are not prone to the flake surface defects typical of ball-milled pigments. The photomicrographs (fig. 1) illustrate the great difference between 'silver dollar' and VMP flakes. Note de contenu : - Applications and use of VMPS - Formulation guidelines - Incorporation into waterborne coatings - Waterborne formulation guidelines En ligne : https://drive.google.com/file/d/1fyhx_iYkiCdeFlrUYpFG3fmlXt1pdiOx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27235 [article]

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