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Alternate chemistries for film formation / Manoj R. Nair in PAINTINDIA, Vol. L, N° 1 (01/2000)

[article]  inPAINTINDIA > Vol. L, N° 1 (01/2000) . - p. 35 -42 Titre : Alternate chemistries for film formation Type de document : texte imprimé Auteurs : Manoj R. Nair, Auteur ; V. C. Malshe, Auteur Année de publication : 2000 Article en page(s) : p. 35 -42 Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  'Formation  film'  'Réaction  chimique'  'Mécanisme  réaction' Index. décimale : 667.9 Revêtements et enduits Résumé : Film formation plays a crucial role in the coating industry. The conventional methods used involves film formation by evaporation of solvent, chemical reaction or by coalescence. In the present paper an effort is made to search for new chemistries. The reference for this paper are organic reactions which were not earlier used and these reactions were selected based on some guidelines. An effort is also made in terms of applying it to coating field. This paper has tried to put forth new ideas which may or not be applicable in practice with hpes that a step has been taken in proper direction. The chemisties mentioned here are open for suggestions and modifications. Note de contenu : - Coventional curing chemistries - Guidelines for selection of a reaction for film formation - New reported reactions - Recommandations Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12673 [article]

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Studies on coating properties of liquid crystalline acrylic copolymers / Vilas D. Athawale in PAINTINDIA, Vol. L, N° 1 (01/2000)

[article]  inPAINTINDIA > Vol. L, N° 1 (01/2000) . - p. 43-50 Titre : Studies on coating properties of liquid crystalline acrylic copolymers Type de document : texte imprimé Auteurs : Vilas D. Athawale, Auteur ; R. S. Bailkeri, Auteur Année de publication : 2000 Article en page(s) : p. 43-50 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Liant  'Acrylique  dérivé  copolymère'  'Cristal  liquide'  Préparation  'Polymérisation  radicalaire'  Séchage  'Propriété  mécanique'  Feuil  Dureté  Flexibilité Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic copolymers based on ethylmethacrylate (EMA), butyl acrylate (BA) / ethyl acrylate (EA) and acrylic acid (AA) were prepared. The monomer compositions were calculated by Fox equation. The acrylic copolymers were modified by incorporating mesogenic group, via grafting, to yield liquid crystalline acrylic copolymers. Incorporation of mesogenic group was confirmed by IR, 1H-NMR and polarizing photomicroscope. These liquid crystalline acrylic copolymers were characterised by DSC and TGA. Both the acrylic copolymers and liquid crystalline acrylic copolymers were studied for their coating applications. Influence of liquid crystallinity on the coating properties of acrylic copolymers was studied in detail. Note de contenu : - EXPERIMENTAL DETAILS - Synthesis of liquid crystalline acrylic copolymers - Structure characterisation - Tests contemplated to study the coating properties - Drying time - Adhesion - Hardness - Flexibility - Chemical resistance - RESULTS AND DISCUSSION - Study of coating properties - Influence of liquid crystalline phase on drying time - Influence of liquid crystalline phase on hardness and flexibility - Influence of liquid crystalline phase on adhesion - Influence of liquid crystalline phase on viscosity - Influence of liquid crystalline phase on chemical resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12676 [article]

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Modern characterisation methods on modern offset resins / Doug Weisel in PAINTINDIA, Vol. L, N° 1 (01/2000)

[article]  inPAINTINDIA > Vol. L, N° 1 (01/2000) . - p. 75-78 Titre : Modern characterisation methods on modern offset resins Type de document : texte imprimé Auteurs : Doug Weisel, Auteur Année de publication : 2000 Article en page(s) : p. 75-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Encre Encre d'imprimerie Lithographie Offset (imprimerie) Poids moléculaires Rhéologie Viscosité Index. décimale : 667.4 Encres Résumé : In lithographic printing, an ink maker relies heavily on the quality of his varnish, primarily to provide a "vehicle" to transfer and direct the pigment to the substrate. It must be as wise as a "professor," knowing when to emulsify just enough to transfer down an ink train but only adhere to the image area on a printing plate. Then, as polished as a "palace guard," this varnish, after being mixed, pushed and squeezed at various shear rates, must stand tall, dry and be resilient to the elements. Finally, the varnish must also act as a "make-up artist" allowing only the best visual properties to be seen upon presentation to the end use customer. How can a varnish perform all of these tasks ? The backbone of a good offset varnish consists of strategically selected hard resins chosen due to their economical, structural and compatibiIity attributes they contribute to the final product. Since the polymers are generally solid at ambient temperatures, fully judging the resin's characteristics require dispersion into a fluid medium. The choice of solution formulation has been the basis for many a lively conversation. The purpose of this paper is to give an ink or varnish maker a useful sketch or "fingerprint" of a prospective resin concentrating on specific properties critical to producing a high quality varnish. This will allow the user to look at a wide range of resins, objectively making relative comparisons using equipment and/or terminology commonly used in this industry. Note de contenu : - ARLO viscosity vs. dilution maps - Criteria for fingerprinting a resin - Molecular weight - High and low shear viscosity - Dilution with magiesol 47 - Methanol number Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36685 [article]

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