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Special optical effect pigments / Mukesh Yadav in PAINTINDIA, Vol. LVII, N° 5 Suppl. (05/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 5 Suppl. (05/2007) . - p. 129-150 Titre : Special optical effect pigments Type de document : texte imprimé Auteurs : Mukesh Yadav, Auteur Année de publication : 2007 Article en page(s) : p. 129-150 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Pigments -- Propriétés optiques Pigments à effets spéciaux Pigments nacrés Index. décimale : 667.9 Revêtements et enduits Résumé : The number of effect pigments appearing, is on increase since various companies are developing innovative ways of generating eye-catching effects. Pearl luster pigments, as one of the category of special effect pigments have become a standard tool for stylists in paints, inks, plastics & cosmetics. A new class of treated aluminum pigments with a coloured appearance has opened the ways to new styling effects, especially when used with transparent pigments. Fine particle TiO2 has also found a place as effect pigments because of its ability to impart novel optical effect to metallic finish. This article is a compilation of some technologies that creates the modern dazzling effects pigments. Note de contenu : - Pearl lustre pigments - History I- Natural pearl luster pigments II - Mono-crystalline pearl luster pigments III - Layer-substrate pigments : Absence of diffuse light scattering - Basic requirements for layers used in pearlescent pigments - SEM, AFM and XRD investigation I - Mica titanium dioxide pigment : Silver white pearl lustre pigments - Interference pigments - Manufacturing process II - Mica iron-oxide pigments : Bronze, copper and red coloured luster pigments III - Gold and many coloured : (combination pigments) Pearl lustre effect - Interference-color by physics Two fundamental color shifts can be discerned in interference pigments - Visual judgment of effect pigments - Multi-angle measurements-absolutely essential - Spectrophotometers-an angle-dependent overview - Blending of pearlescent pigments - Blending with carbon black and aluminium - Blending with organic and effect pigments - Application of pearl lustre pigments - Pearl luster pigments in paints - Incorporation of pearl luster pigments in coatings - Stabilizing the dispersion Orientation of pearl lustre pigments in a coating - Spray application - Pearlescent pigments in waterborne system - Special effect pigments in printing inks Colour and effect in printing inks - Printing application with special effect pigments - Incorporation of pearl luster pigments to printing inks - Fine particle titanium dioxide - Special optical effect in metallic finishes - Coated aluminiums - Aluminium coated with iron oxide - Aluminium coated with aluminium oxide - Aluminium coated with silica - Optical properties. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11451 [article]

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SILICON : Past, present and future in paint industry / Amruta Vinod Joshi in PAINTINDIA, Vol. LVII, N° 5 Suppl. (05/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 5 Suppl. (05/2007) . - p. 151-168 Titre : SILICON : Past, present and future in paint industry Type de document : texte imprimé Auteurs : Amruta Vinod Joshi, Auteur Année de publication : 2007 Article en page(s) : p. 151-168 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Revêtements 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). Index. décimale : 667.6 Peintures Résumé : The present paint industry is dominated by carbon chemistry. Silicon is a tetravalent element like carbon. Structurally, both the elements resemble each other, and both form chains made up of repeating units - an essential prerequisite, a polymer chemist is looking for. Inorganic and organic silicon based compounds exhibit extraordinary properties and find wide application in paint industry. Few of the important applications are listed below : • Inorganic zinc silicate primers • Silicone resins for high temperature resistance • Silicone modified resins for coil coatings • Water proofing of concrete structures by impregnation • Molecular sieves as moisture scavengers • Additives as adhesion promoters, defoamers, slip agents etc. The paper discusses these applications along with the underlying basic chemistry of silicon. Though, carbon and silicon, both are tetravalent elements, the three principal characteristics of silicon that distinguish it over carbon, are: 1. Silicon has tremendous affinity for oxygen, and is difficult to separate from oxygen. Thus silicon-oxygen bond is much stable than carbon-oxygen or carbon-carbon bond. 2. Silicon is active at very high temperatures but sluggish in its reactions at room temperature i.e. it has a high activation energy. 3. The covalent compounds of silicon, such as hydrides and halides, are not stable towards air and water, unlike similar carbon compounds. 4. Silicon has d - orbitals readily available in its atomic structure, and so it can expand its bonding capacity to six instead of being limited to four, in case of carbon. Note de contenu : How much silicon and why ? - Structure of the silicates I - Orthosilicates II - Pyrosilicates III - Cyclic silicates IV - Chain silicates V - Sheet silicates VI - Three-dimensional silicates Silicon a late bloomer - Applications : 1. Water repellant coating - 2. Zinc silicate - 3. Protection of construction materials - 4. N-Halamine siloxane as a biocide - 5. Silanes as adhesion promoter - 6. Silicone polyesters - Uses of silicone co-polymer coatings : 7. Fiber glass reinforced thermosetting resins - 8. Fumed silica - 9. Silicone additives Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11452 [article]

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Water sorption in polymers and its application in coatings and other areas / Amit Garle in PAINTINDIA, Vol. LVII, N° 5 Suppl. (05/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 5 Suppl. (05/2007) . - p. 169-178 Titre : Water sorption in polymers and its application in coatings and other areas Type de document : texte imprimé Auteurs : Amit Garle, Auteur ; Aadarsh Rao, Auteur ; V. C. Malshe, Auteur Année de publication : 2007 Article en page(s) : p. 169-178 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Eau Polymères Index. décimale : 667.9 Revêtements et enduits Note de contenu : Sorption phenomena - Modes of sorption - Different states of water - Molecular composition, symetry and polarity - Crosslinking - Crystallinity - Fillers or impurities - Sorption of more than one component - Temperature - Applications of water sorption in polymers - Smart gels - Applications of smart gels - Medicinal - Drug delivery systems - Artificial muscles - Automotive industry - Dental applications - Superabsorbents - Diapers - Feminine hygiene products - Packaging applications - Soil conditioners - Fuel cells Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11453 [article]

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Polyaniline - A promising future trend for enhanced corrosion protection / Sasidhar V. Siddabattuni in PAINTINDIA, Vol. LVII, N° 5 Suppl. (05/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 5 Suppl. (05/2007) . - p. 179-184 Titre : Polyaniline - A promising future trend for enhanced corrosion protection Type de document : texte imprimé Auteurs : Sasidhar V. Siddabattuni, Auteur Année de publication : 2007 Article en page(s) : p. 179-184 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Polyaniline Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Inherently conducting polymers (ICP's) - Polyaniline (PANI) - Mechanism of corrosion protection by PANI - Use of PANI for corrosion protection - Problems associated with PANI - Development of double strand PANI - Advantages of double strand PANI - Easily dispersibles PANI powders : pigments - Commercial availability of PANI and their applications Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11454 [article]

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