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Breaking the mould / John Gillatt in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 193, N° 4469 (10/2003)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 193, N° 4469 (10/2003) . - p. 21-25 Titre : Breaking the mould Type de document : texte imprimé Auteurs : John Gillatt, Auteur Année de publication : 2003 Article en page(s) : p. 21-25 Langues : Anglais (eng) Catégories : Algicides Antifongiques Antimicrobiens Revêtements en bâtiment -- Détérioration:Peinture en bâtiment -- Détérioration Revêtements en bâtiment:Peinture en bâtiment Index. décimale : 667.9 Revêtements et enduits Résumé : Changing labelling regulations require new ideas and the introduction of new blends of biocides. The author explores the strategies for decontamination. Of the three main groups of microorganims that can infect paints, plasters and similar surface coatings it is fungi and algae that are especially problematic after the material has been applied. Fungi cause surface disfigurement and actual degradation, while algae also detract from the product's aesthetic qualities as well as retaining high levels of moisture with resultant damaging effects. Exterior surfaces can become infected with both types of organisms and broad-spectrum antifungal or antialgal biocides have been developed to prevent such growths. However, changing legislation relating to the labelling of such biocides, pressure from environmental and consumer groups and revised regulations concerning insulation of buildings, have placed greater and greater demands on biocides and have created a need for new products with novel properties. Note de contenu : - Specialist requirements - Microorganisms on coatings - Effects of fungi and algae - Preventio, methods - Surface coating biocides - Biocides for dry-film protection - Changing Demands - Evironmental/ consumer pressure - Changed building construction - Better insulation, worse growth - New properties for biocides - Development of new biocides - Discolouration - Greater demands on products - FIGURES : 1. (far below) ; Fungi and algae can deface buildings even in cold conditions, while humid climates are a natural heaven for orgnaisms (Figure 2 below), and can even create a plafromr for the growth of higher plants (Figure 3) - 4. Cavity wall and ETICS wall structures showing heat transfer processes - 5. Reduced leaching of silica adsorbed OIT from a paint film - 6. Delta B values for five biocides - TABLES : 1. Predominant fungi and algae found in sites around the world - 2. Properties required of a surface coating biocide - 3. Fungicides and algicides for surface coatings - 4. Minimum inhibitory concentration (MICs) of four fungicides - 5. Disadvantages of dry-film fungicide active agents - 6. Fungal and algal efficiency tests with two biocides blends Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27826 [article]

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Keeping the heat down / Jeff Nixon in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 193, N° 4469 (10/2003)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 193, N° 4469 (10/2003) . - p. 26-30 Titre : Keeping the heat down Type de document : texte imprimé Auteurs : Jeff Nixon, Auteur Année de publication : 2003 Article en page(s) : p. 26-30 Langues : Anglais (eng) Catégories : Anti-réflectance Noir (couleur) Pigments Rayonnement infrarouge Réflectivité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : IR-reflective pigments are increasingly being used to keep roofs cool. The author explains how they can save energy by decreasing heat-build-up. The growing interest in Energy Efficient and 'Eco-friendly' materials is huge and shows no signs of slowing down. Infared-reflective, or 'cool', products is one of the most talked about of these technologies. It is also one of the most misunderstood. In this context, cool means reflective to solar energy. A solar-reflective product that sits under the sun builds up less heat than that which is non-reflectuve. Many references in literature have equated 'cool products' with white products. Certainly white objects are good reflectors of the sun's heat. However, offering 'any colour as long as it is white' is not an ideal design strategy. Infrared-reflective pigments allow for the design of products that remain cool under the sun - without sacrificing colour. The benefits include energy savings, longer product life, cooler cities and improving the quality of life. The sun spans a wide range of wavelengths. Much of the total energy is absorbed in our atmosphere and never reaches the Earth's surface. The light that does get through ranges from 300-2500 nanometers (nm) in wavelength. Note de contenu : - Wavelenghts work - Pigment play - Cool benefits - Application - FIGURES : 1. The intensity of solar energy at the earth's surface. Although a substantial portion of the total solar energy is visible to the human eye, the majority is invisible infrared region- 2. Coloured surfaces absorb light at certain wavelengths and reflect it at others - 3. Two black pigments can have very different infrared reflectance properties. IR-reflective blacks can be five times more reflective than conventional blacks - 4. A custom made with IR-reflective pigments has greater TSTR and remains cooler under the sun - 5. Despite having a greater overall IR-reflectance, the phthalo has a lower TSR. The cobalt blue's reflectance is greater from 700-1100nm, where the solar intensity is highest and contributes the most toward heat build-up Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27827 [article]

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User friendly steel protection / Andrew Cockcroft in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 193, N° 4469 (10/2003)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 193, N° 4469 (10/2003) . - p. 32-36 Titre : User friendly steel protection Type de document : texte imprimé Auteurs : Andrew Cockcroft, Auteur Année de publication : 2003 Article en page(s) : p. 32-36 Langues : Anglais (eng) Catégories : Automobiles -- Revêtements Métaux -- Revêtements poudre Primaire (revêtement) Index. décimale : 667.9 Revêtements et enduits Résumé : A new single application powder system can shave significant process costs in the coating of galvanised steel, writes by the author. Note de contenu : - Zinc potential - Differentiation - Powder challenge - TABLES : 1. List of powder zinc primers tested using hot neutral salt spray (ASTM B117) to 3000 hours and supported with natural exposure testing - 2. Creep figures once coating systems tested have been sprayed with hot neutral salt spray (HNSS ASTM B117) up to 3000 hours - 3. Powder primer performance is tested using natural exposure over 17 months at the Blyth coast test site Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27828 [article]

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