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Advances in minimizing dirt pick-up on exterior latex paints / Girish A. Bhagwat in PAINTINDIA, Vol. LI, N° 12 (12/2001)

[article]  inPAINTINDIA > Vol. LI, N° 12 (12/2001) . - p. 35-42 Titre : Advances in minimizing dirt pick-up on exterior latex paints Type de document : texte imprimé Auteurs : Girish A. Bhagwat, Auteur ; Bhandup, Auteur ; L. B. S. Marg, Auteur Année de publication : 2001 Article en page(s) : p. 35-42 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Mécanisme  action'  Libération  Salissure  Encrassement  Extérieur  'Matériau  revêtement'  Feuil  'Peinture  émulsion'  eau' Index. décimale : 667.9 Revêtements et enduits Résumé : The importance of Dirt Pick-Up Resistance (DPUR) in exterior latex paint is highlighted with reference to retaining its aesthetics for longer periods, in polluted city environs of India which show higher levels of suspended particles in the atmosphere. Mechanisms of dirt pick-up and dirt release along with important factors to be considered while formulating exterior latex paints which will help in minimizing dirt pick-up are discussed. Note de contenu : - DIRT PICK-UP ON LATEX PAINTS-CAUSE AND MECHANISM - FORMS OF DIRT PICK-UP - CHEMICAL NATURE OF DIRT - QUANTITATIVE ASSESSMENT OF DIRT PICK-UP ON LATEX PAINT FILMS : Natural exposure - Laboratory method (Method-I (inorganic dirt) - Method-II ( mixture of inorganic and organic dirt)) - MECHANISM OF DIRT RELEASE - FACTORS PROMOTING DIRT RELEASE : Influence of glass transition temperature - Influence of monomer type - Influence of surface crosslinking - Influence of PVC - Influence of hydrophobicity - Influence of surface morphology - Influence of coalescing agents - Influence of opaque polymer - ADDITIONAL METHODS SUGGESTED TO MINIMIZE THE EFFECT OF DIRT PICK-UP : Structural design - Selection and application of appropriate shade Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12634 [article]

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Energy conservation and related paints / Pranoti Pokale in PAINTINDIA, Vol. LI, N° 12 (12/2001)

[article]  inPAINTINDIA > Vol. LI, N° 12 (12/2001) . - p. 43-52 Titre : Energy conservation and related paints Type de document : texte imprimé Auteurs : Pranoti Pokale, Auteur ; V. C. Malshe, Auteur Année de publication : 2001 Article en page(s) : p. 43-52 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : ENERGY is the ability of matter or radiation to do work, or it is power derived from physical resources to provide light, heat, etc. Energy sources are limited. The best option with the available resources is to conserve the energy and use it more judiciously so that we can make these last longer. Note de contenu : - NEED FOR ENERGY CONSERVATION - USE OF PAINTS IN ENERGY CONSERVATION - PAINTS FOR SOLAR COLLECTORS : Process for conversion of solar radiation to electricity and heat - Characteristics of selective solar paints (Semiconductor pigmented selective paints - Inorganic metal oxide pigmented selective paints - Organic black pigmented selective paints - Metal dust pigmented selective paints) - New developments (a polymer that knows when it's too hoot) - PAINTS FOR NUCLEAR INDUSTRY : Requirements and standards - Properties required of paints are as follows - Standards - Radiation effect (Radiation resistance of coatings) - Radioactive contamination - Decontamination of painted surfaces - Decontamination standards - Formulation of decontamined paints - Types of paints (Chlorinated rubber based paint - Epoxide resin paints - Polyurethane paint) - PAINTS FOR RADAR APPLICATION : Need for radar absorbing paints or materials - Secret of radar - absorbing paints - Old fashioned edge - Types of radar absorbing paints - PAINTS FOR INSULATION : Types of insulating paints (insulation by paint with hollow microspheres - Insulation by paint with solid sphere - Insulation by paint with staple fibres - Insulation by paint with multi layer coating) - Applications Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12635 [article]

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Radiation curing and film properties of modified epoxy resins - a review / Madhu Bajpai in PAINTINDIA, Vol. LI, N° 12 (12/2001)

[article]  inPAINTINDIA > Vol. LI, N° 12 (12/2001) . - p. 53-57 Titre : Radiation curing and film properties of modified epoxy resins - a review Type de document : texte imprimé Auteurs : Madhu Bajpai, Auteur ; V. Shukla, Auteur Année de publication : 2001 Article en page(s) : p. 53-57 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Rayonnement  UV'  Durcissement  'Modification  chimique'  'Epoxyde  résine'  Liant  Peinture  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Normally epoxy resin has versatile applications in coating, adhesives and electrical industries by chemical curing. The other alternative emerging field in the area of curing is by radiation, for which U. V., E.B., visible, microwave, I.R., X-ray, γ-ray are used. Because U.V. curing contributes to air pollution control, conserves energy, improves cure speed and reduces capital cost by space saving and economical equipment purchase, it has become the preferred technology in many industrial coating, ink and adhesives applications. Note de contenu : TYPES OF EPOXY RESINS : Bisphenol-A based epoxy resin - Other glycidyl based epoxy resins - Glycidyl ethers of aliphatic diols - Aromatic glycidyl amines - Epoxydised cycloaliphatic olefins - Glycidyl esters NOVALIC RESINS : Ingredients of novalac (Phenol and substituted phenol, formaldehyde, acid catalyst, preparation of novalac) RADIATION CURING : Material (ingredients) - Oligomers (resins or binder) - Monomers - Cross linking monomers - Non-corsslinking monomers - Photoinitiators - Mechanism ADVANTAGES OF UV-CURING : Application of UV-curing (For leather, for metals, for printing inks, for plastics, for paper, for wood) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12644 [article]

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The chemistry of resin stabilised pigment dispersions : a colloid Chemistry approach / D. S Jayasuriya in PAINTINDIA, Vol. LI, N° 12 (12/2001)

[article]  inPAINTINDIA > Vol. LI, N° 12 (12/2001) . - p. 59-70 Titre : The chemistry of resin stabilised pigment dispersions : a colloid Chemistry approach Type de document : texte imprimé Auteurs : D. S Jayasuriya, Auteur ; R. W. Chylla, Auteur Année de publication : 2001 Article en page(s) : p. 59-70 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Interaction  particule'  'Particule  en  suspension'  Encre  Stabilisation  'Dispersion  aqueuse'  Pigment  'Peinture  eau'  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Concentrated pigment dispersions are commonly used as precursors in the manufacture of aqueous inks and paints. These pigment dispersions are prepared by the reduction of the particle size of the pigment through mechanical grinding followed by the stabilisation of the pigment particle in the aqueous media. This stabilisation is frequently accomplished using low molecular weight acrylic resins. The actual performance of the resulting pigment dispersions, as described by the intensity of the colour development, stability and compatibility, is a strong function of the chemical composition and structure of the acrylic resin stabiliser. This paper describes how the performance of these dispersions can be explained in terms of the chemistry of the resin-stabilised pigment dispersions. Particle-particle interactions described by DL VO theory and the physical chemistry characterisation of the stabilised dispersions will provide insight into the workings of these chemical systems. Note de contenu : EXPERIMENTAL RESIN PREPARATION THE MECHANICS OF PIGMENT DISPERSION PERFORMANCE IN AN INK APPLICATION : Viscosity stability - Colour development PHYSICAL CHEMISTRY CHARACTERIZATION : Colloid properties of pigment dispersions - Experimental description COLLOID MICROSTRUCTURE OF PIGMENT DISPERSION Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12645 [article]

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Colour of pigments : An explanatory note - I / N. Sekar in PAINTINDIA, Vol. LI, N° 12 (12/2001)

[article]  inPAINTINDIA > Vol. LI, N° 12 (12/2001) . - P. 71-72 Titre : Colour of pigments : An explanatory note - I Type de document : texte imprimé Auteurs : N. Sekar, Auteur Année de publication : 2001 Article en page(s) : P. 71-72 Langues : Anglais (eng) Tags : Couleur  'Propriété  optique'  Pigment  Peinture  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : COLOR, like music, is a pure sensation and is defined mostly indirectly and circularly. Color perception describes at least three subtle aspects of reality : 1. Inherent property of an object. 2. Characteristics of light rays. 3. Visual sensation and brain's interpretation. An object looks colored because it interracted with surrounding light, and the human eye is able to perceive the light thus sent out. A useful functional definition, therefore sounds as : 'Color is that part of perception that is carried to us from our surroundings by differences in the wavelengths of light, is perceived by the eye, and is interpreted by the brain. Note de contenu : INTERACTION OF LIGHT WITH MATTER ABSORPTION OF VISIBLE RADIATION REFLECTION AND REFRACTION OF LIGHT Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12646 [article]

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Resonance disintegration produces ultrafine carbon products from pyrolysis char for use in printing inks / Timothy Karpetsky in PAINTINDIA, Vol. LI, N° 12 (12/2001)

[article]  inPAINTINDIA > Vol. LI, N° 12 (12/2001) . - p. 73-79 Titre : Resonance disintegration produces ultrafine carbon products from pyrolysis char for use in printing inks Type de document : texte imprimé Auteurs : Timothy Karpetsky, Auteur Année de publication : 2001 Article en page(s) : p. 73-79 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Résonance  'Onde  choc'  Désintégration  Pneumatique  'Déchet  caoutchouc'  'Poudre  ultrafine'  Pyrolyse  Semicoke  Préparation  'Noir  carbone'  'Pigment  minéral'  Encre Index. décimale : 667.9 Revêtements et enduits Résumé : Low temperature pyrolysis of shredded automobile tires yields char consisting of carbon particles. This coarse granular material must be size-reduced to be of commercial interest. Traditional milling and grinding techniques have been tried without success. However, a new efficient and inexpensive method, resonance disintegration, consistently converts char to ultrafine carbon products in production rates of one ton per hour. During resonance disintegration, char granules experience multiple high-energy shock waves, resulting in the immediate production of carbon having an average primary particle diameter of 38 nanometers in aggregates and agglomerates ranging in size from 100 nanometers to 10 microns. Over 70% of the carbon particulate volume is below one micron when dispersed in water. Very rapid surface treatment of particulates can be accomplished, as coarse material is size-reduced using resonance disintegration. The uses of these new carbon products as black pigments in printing inks are also described. Note de contenu : PYROLYTIC CHAR RESONANCE DISINTEGRATION (RD) RESONANCE DISINTEGRATION OF CARBON BLACK AND PYROLYTIC CHAR : Particle size distribution - Pyrolytic char MORPHOLOGY OF PYROLYTIC CHAR BEFORE AND AFTER RESONANCE DISINTEGRATION PHYSICAL PROPERTIES OF CHAR AFTER RESONANCE DISINTEGRATION Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12647 [article]

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