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Water trafficable coatings / Thomas Stingl in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4492 (09/2005)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4492 (09/2005) . - p. 23-28 Titre : Water trafficable coatings Type de document : texte imprimé Auteurs : Thomas Stingl, Auteur ; Thorsten Rische, Auteur ; Thomas Munzmay, Auteur ; Hans Josef Laas, Auteur Année de publication : 2005 Article en page(s) : p. 23-28 Langues : Anglais (eng) Catégories : Liants Polyuréthanes Revêtements bi-composant:Peinture bi-composant Revêtements de sols:Peinture de sols Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Authors explain why waterborne two component polyurethane systems are finally good enough to use in trafficable coatings. Waterborne two-component (2K) polyurethane (PUR) coatings have long proven suitable for a wide variety of applications, such as the coating of plastics and wood. However, waterborne 2K polyurethane systems have not yet been able to establish themselves in the formulation of trafficable floor coatings (e.g. automobile showrooms, garages, etc.) due to the special requirements of such applications. In recent years the development of new waterborne binders has improved the performance of coating materials formulated with these binders to such and extent that we can now present cosolvent-free, manually mixable systems with above-average mechanical and chemical properties, which even satisfy the requirements of trafficable floor coatings. Note de contenu : - Identical crosslinking behaviour of waterborne and conventional polyurethanes - Film quality is virtually independent of the climate- No winter/summer quality - Water - Now its trafficable - Not all tires are the same - Method for testing tire resistance - ...and are VOC-free - Waterborne 2K polyurethane systems take over yet another field of application Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27619 [article]

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Improved facade coatings / Frank Ludwig in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4492 (09/2005)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4492 (09/2005) . - p. 30-34 Titre : Improved facade coatings Type de document : texte imprimé Auteurs : Frank Ludwig, Auteur Année de publication : 2005 Article en page(s) : p. 30-34 Langues : Anglais (eng) Catégories : Chlorure de polyvinyle Copolymère styrène acrylique Formulation (Génie chimique) Humidité -- Absorption:Eau -- Absorption Perméabilité Polyacryliques Polymères en émulsion Résistance à l'humidité:Résistance à l'eau Revêtements en bâtiment:Peinture en bâtiment Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Vapeur d'eau Index. décimale : 667.9 Revêtements et enduits Résumé : The author explains how with the addition of special emulsified silicone resins has resulted in facade coatings with an improved water vapour permeability. At all times people have been striven to protect their buildings well. In the past they mainly used silicate paints. Nowadays emulsion-based paints are commun for this purpose. During the 60s acrylic polymer emulsions appeared on the market. They are the foundation of modern coatings and have replaced silicate paints in many applications. The advantages are faster drying, good adhesion on non mneral surfaces, better pigmentation and simple handling. Standard formulations with 15-22 polymer emulsion (active matter content)lead to closed films with excellent weather resistance and very low water absorption. Their water resistance compared to silicate paints was a great progress. But there are still damages at facades - and this exhibits the system's limits. Construction defects at the roof or missing protection of the foundation can cause the migration of water into the masonry. In this situation the missing water vapour permeability becomes a great disadvantage. The coating will not allow water, to escape by diffusion. As a resukt blisters form and flaking can occur. Finally there is no more protection for the masonry and decomposition will take place. To solve this problem, facade coatings with an improved water vapour permeability have been developed. These exhibit a low film tension, achieved through a special pigmentation and a lower polymer emulsion content. The coating offers a porous structure and therefore is diffusionable. Unfortunately the water absorption increases and driving rain can cause moist masonry. To reach an additional water protection special emulsified silicone resins have to be added. The resulting silicone resin emulsion paints conbine both properties, water resistance and water vapour permeability. This is the most effective protection for buildings. Note de contenu : - Influence of pigment volume concentration and polymer emulsion - Evaluation of the water absorption - Evaluation of the water vapour diffusion - Evaluation of the dirt pick-up - Influence of hydrophobing agents - Early rain resistance and dosage of silicone resin emulsions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27620 [article]

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Polymer weathering / Olivier Haillant in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4492 (09/2005)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4492 (09/2005) . - p. 38-40 Titre : Polymer weathering Type de document : texte imprimé Auteurs : Olivier Haillant, Auteur Année de publication : 2005 Article en page(s) : p. 38-40 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Essais accélérés (technologie) Photodétérioration Revêtements -- Détérioration:Peinture -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : The author looks at the various approaches taken to put accelerated weathering tests into practice. Although the weathering of organic materials has long been acknowledges, ti was only in the 50's, with the widespread use of paints and coating in our everyday life, that the detrimental effect of light on organic materials became a serious concern to engineers of the coatings industry. It appeared that two main approaches could be considered to adress the problem : consider weathering as a global process affecting the functional properties of a material or approach weathering as a range of chemical reactions at the molecular level accounting for the loss of the service life properties. Note de contenu : - One field, two approaches - Chemical photo-aging at the molecular level - The control of relevance based on chemical analysis - Towards the prediction of the durability Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27623 [article]

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'Suntan' for coatings / Karl Bechtold in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4492 (09/2005)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4492 (09/2005) . - p. 41-44 Titre : 'Suntan' for coatings Type de document : texte imprimé Auteurs : Karl Bechtold, Auteur Année de publication : 2005 Article en page(s) : p. 41-44 Langues : Anglais (eng) Catégories : Absorbeurs de rayonnement ultraviolet Antioxydants Automobiles -- Habitacles Phénols Résistance thermique Revêtements -- Additifs Stabilisant à la lumière de type amine encombrée Stabilisants (chimie) Index. décimale : 667.9 Revêtements et enduits Résumé : The combination of different stabilisers as described above generated positive synergistic effects for the protection of interior coating against light and heat. It could be shown that a stabiliser system consisting of UV-absorber and radical scavenger is good to excellent in exterior plastic coatings stabilisation - both in gloss retention and colour change behaviour. Using the same - only light stabilisation - concept in car interior (soft feel) coatings is not sufficient to fulfill all demands. The addition of a small amount of a slow hydrolyzing phenolic antioxidant with low yellowing tendency can be advantageous to significantly reduce the colour development in heat-exposed coatings. Note de contenu : - PLASTICS, A MATERIAL OF THE FUTURE, ALSO IN THE AUTOMOTIVES INDUSTRY - GIVING COATINGS SOME PROTECTIVE PROPERTIES - THE 'SUN TAN LOTION' FOR COATINGS : UV-absorbers - Sterically hindered amines (HALS) - PROTECTION FROM SUNLIGHT FOR EXTERIORS AND INTERIORS : Experimental conditions - Xenon weather-O-meter conditions - TEST RESULTS OF ACCELARATED WEATHERING EXPOSURE AND HEAT EXPOSURE ON INTERIOR CAR PART SYSTEMS - WHEN OUTSIDE AND INSIDE BECOME ONE Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27624 [article]

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Improved adhesives / Anita Neau in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4492 (09/2005)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4492 (09/2005) . - p. 50-52 Titre : Improved adhesives Type de document : texte imprimé Auteurs : Anita Neau, Auteur Année de publication : 2005 Article en page(s) : p. 50-52 Langues : Anglais (eng) Catégories : Adhésifs -- Additifs Colles:Adhésifs Formulation (Génie chimique) Naphtols Plastifiants Rubans adhésifs Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The author explains why naphthenic plasticisers present a good compatibility with most polymers and resins used in general purpose adhesives. When selecting raw materials for new adhesive formulations, an important factor to consider is the compatibility with most polymers and resins used in general purpose adhesives. In this paper, we will discuss how naphthenic plasticisers interact with other ingredients and how the choice of plasticiser influences final adhesive properties. Note de contenu : - General properties of naphthenic plasticisers - Compatibility with polymers and resins, influence on adhesive properties - Example : performance of naphtenic plasticisers in a tape formulation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27625 [article]

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