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Silica gels sector to grow / David Kent in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4482 (11/2004)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4482 (11/2004) . - p. 12-14 Titre : Silica gels sector to grow Type de document : texte imprimé Auteurs : David Kent, Auteur ; Tim Fletcher, Auteur ; Norbert Wings, Auteur Année de publication : 2004 Article en page(s) : p. 12-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Calcium Gel de silice Métaux -- Revêtements protecteurs Pigments Index. décimale : 667.9 Revêtements et enduits Résumé : The author conclude, in Part 2, why silica gels will increase in popularity as the desire to couple high anti-corrosive perfomance with environmental awareness intensifies. The development of more environmental friendly coating systems presents new challenges to the manufacturers of speciality chemicals and additives for coatings. New matting agents designed to meet the specific challenges provided by waterborne, high-solids and, to some extent UV curing systems have been commercialised in recent years. However, there is a continuiting demand for new, improved products and development programmes are ongoing. It is expected that calcium modified silica gel pigment technology will be turned to more and more as the preferred non-toxic method of corrosion control in all types of coatings, as the desire to couple high anti-corrosive performance with environmental awareness intensifies. Note de contenu : - Addition levels - Corrosion resistance suppression - Other combinations - Grades offered - Weathering results - FIGURES : 1. Representation of the surface of Ca/Silica pigments - 2. Diagrammatic representation of the mechanism of action of Ca/Silica pigments (ferrous substrates) - 3. Type ACs vs. zinc chromate in a 2 pack epoxy and a short oil alkyd after 10 years outdoor weathering - 4. The effect of Type AC3 in combination with silane A 187 on wet adhesion of a wash primer formulation on aluminium after water soaking at 40°C - 5. The effect of the combination of type with Alcophor 827 in a waterborne alkyd (resydrol 436W) on salt performance over degreased cold rolled steel - 6. Diagrammatic representation of the ion-exchange between silica gel and calcium ions. - TABLES : 1. Typical properties of Ca/silica pigments compared to conventional anti-corrosive pigments - 2. A comparison of the different grades of calcium modified silica gel pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27676 [article]

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Packaging inks go green / Nick Ivory in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4482 (11/2004)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4482 (11/2004) . - p. 15-16 Titre : Packaging inks go green Type de document : texte imprimé Auteurs : Nick Ivory, Auteur Année de publication : 2004 Article en page(s) : p. 15-16 Langues : Anglais (eng) Catégories : Amorceurs (chimie) Emballages en matières plastiques Encre Index. décimale : 667.9 Revêtements et enduits Résumé : The author explains why cationic inititators offer packaging that is within intented migration levels while displaying greatly improved photospeed in inks. Note de contenu : - Demand for plastics - Improving cationic inks Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27677 [article]

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Colour communication / Priti Patel in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4482 (11/2004)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4482 (11/2004) . - p. 23-30 Titre : Colour communication Type de document : texte imprimé Auteurs : Priti Patel, Auteur Année de publication : 2004 Article en page(s) : p. 23-30 Langues : Anglais (eng) Catégories : Colorimétrie vision des couleurs Index. décimale : 667.9 Revêtements et enduits Résumé : Colour plays an important part in consumer choice so it is vital that manufacturers get the way a product looks right. How would you describe the colour of a rose? Would you say it's yellow, sort of a lemon yellow or maybe a bright canary yellow? Your perception and interpretation of colour are highly subjective. Eye fatigue, age and other physiological factors can influence your colour perception. But even without such physical considerations, each observer interprets colour based on personal references. Each person also verbally defines an object's colour differently. As a result, objectively communicating a particular colour to someone without some type of standard is difficult. There also must be a way to compare one colour to the next with accuracy. The solution is a measuring instrument that explicitly identifies a colour. That is, an instrument that differentiates a colour from all others and assigns it a numeric value. Note de contenu : - Ways to measure colour - Spherical - 0/45 or 45/0 - Multi-angle - Colorimeter - Integrated colour throughout the supply chain - Special Effect and Pearlescent Paint - Applications - Hue - Chroma - Lightness - The Munsell Scale - CIE Colour Systems - Chromaticity values - CIELCH (L*C*h°) - Delta CIELAB and CIELCH - CIE Coulour Space Notation - CIELAB tolerancing - CIELCH Tolerancing - CMC Tolerancing - CIE94 Tolerancing - Choosing the Right Tolerance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27678 [article]

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True blue / Arran Marshall in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4482 (11/2004)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4482 (11/2004) . - p. 31-32 Titre : True blue Type de document : texte imprimé Auteurs : Arran Marshall, Auteur Année de publication : 2004 Article en page(s) : p. 31-32 Langues : Anglais (eng) Catégories : Bleu outremer Le bleu outremer ou outremer est un bleu profond, longtemps extrait de la pierre fine de lapis-lazuli puis fabriqué synthétiquement à partir du XIXe siècle. La base est un thiosulfate d'aluminosilicate de sodium. Dispersions et suspensions Emballages Encre flexographique Polyacryliques Surfactants Index. décimale : 535.6 Couleur Résumé : The need to meet a raft of European legislation has fuelled a surge in demand for aqueous flexo printed paper and packaging materials which comply, writes by the author. With consumers becoming increasingly environmentally aware and legislation becoming ever more stringent, the envirobment is slowly creeping up the business agenda. Europe is leading the way and setting a benchmark for the rest of the world, having serious implications for the majority of companies within the region. The inks market is no exception to this with regulations on health, safety and the environment becoming increasingly strict. This is with particular reference to legislation restricting Volative Organic Content (VOC) emissions to the atmosphere and the restriction of heavy metals content of coloured or printed packaging (CONEG regulations and European Directive 94/62/EC 1994). The need for ink markers to use colourants that meet these purity requirements has fuelled a surge in demand for aqueous flexo printed paper and packaging materials which comply. Artizan AF is a range of a high strength, ultramarine dispersions that have been developed specifically to cope with the high demands of the printing industry and are aimed directly at the aqueous flexographic ink market. The range consists of two products, Artizan AF-S, surfactant based allowing freedom of formulation and wide compatibility, and Artizan AF-R, acrylic resin based making it easy to incorporate and excellent to transfer. Table 1 shows the main differences between the two dispersions. Note de contenu : - Vibrant colours - Dark backgrounds - Maximising colour Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27679 [article]

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