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VOC protocols and high solid acrylic coatings / Dipak K. Chattopadhyay in PAINTINDIA, Vol. LI, N° 10 (10/2001)

[article]  inPAINTINDIA > Vol. LI, N° 10 (10/2001) . - p. 31-42 Titre : VOC protocols and high solid acrylic coatings Type de document : texte imprimé Auteurs : Dipak K. Chattopadhyay, Auteur ; Ramanuj Narayan, Auteur ; K. V. S. N. Raju, Auteur Année de publication : 2001 Article en page(s) : p. 31-42 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Réticulation  'Acrylate  polymère'  'Masse  moléculaire'  Viscosité'Propriété  rhéologique'  'Acrylique  dérivé  Liant  'Solvant  organique'  'Prévention  pollution'  'Pollution  air'  'Composé  organique  volatil'  'Formulation  Peinture'  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Worldwide emphasis on environmental consciousness in recent years has required constant attention to all V.O.C. emitting sources. The situation represents a challenge to coating science, as the need arose to lower the solvent content and some major development has taken place in the last few years. In the present paper, control of VOC content using different methods for acrylic coatings crosslinked with MF and isocyanate resin has been discussed. Control of binder viscosity and molecular weight for high solid thermoset acrylic coatings by adopting different methods has also been discussed. Note de contenu : - Volatile organic components (VOCs) - Air quality regulation in Europe: Protocol developed - Methods to reduce the acrylic resin molecular weight - Other methods - Cross-linking of acrylate resins - Isocyanate cured acrylics Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12622 [article]

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Caprolactone modification of polyester resins / Nishant N. Prabhu in PAINTINDIA, Vol. LI, N° 10 (10/2001)

[article]  inPAINTINDIA > Vol. LI, N° 10 (10/2001) . - p. 43-48 Titre : Caprolactone modification of polyester resins Type de document : texte imprimé Auteurs : Nishant N. Prabhu, Auteur ; Deepak M. Bhatt, Auteur ; C. Suryanarayana, Auteur Année de publication : 2001 Article en page(s) : p. 43-48 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Caprolactone  'Matériau  modifié'  'Modification  chimique'  'Ester  polymère'  Liant  Formulation  Peinture  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Three caprolactone modified polyesters with similar raw material compositions were synthesized by varying the mode of reaction of caprolactone so as to get one polyester with a caprolactone chain as the side chain and two polyesters with a caprolactone chain in the backbone. The viscosities of these polyesters and the properties of the film obtained by curing these polyesters with HMMM were compared. An unmodified polyester was synthesized and used as control resin. While caprolactone modification was found to give lower viscosity, the lowering of the viscosity was significant in case of polyesters with caprolactone in the backbone. Incorporation of caprolactone in the backbone can lower the pencil hardness of the film, but this problem can be overcome by first polymerizing caprolactone to form polycaprolactone and then reacting it in the backbore. Caprolactone in the backbone also improves the cupping value of the film. Note de contenu : - Experimental : Materials - Synthesis - Unmodified polyester (UP) - Modofied polyester 1 (MP1) - Modified polyester 2 (MP2) - Modified polyester 3 (MP3) - Analysis : Characterization of the polyester resins - Crosslinking and characterization of coating films Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12623 [article]

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Utilisation of cost effective, non-traditional materials in formulation of protective coatings / S. Tiwari in PAINTINDIA, Vol. LI, N° 10 (10/2001)

[article]  inPAINTINDIA > Vol. LI, N° 10 (10/2001) . - p. 49-56 Titre : Utilisation of cost effective, non-traditional materials in formulation of protective coatings Type de document : texte imprimé Auteurs : S. Tiwari, Auteur ; M. Saxena, Auteur ; Sandeep Kumar Tiwari, Auteur Année de publication : 2001 Article en page(s) : p. 49-56 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Etude  expérimentale'  'Cendre  volante'  'Matière  charge'  'Réutilisation  déchet'  première  remplacement'  'Epoxyde  résine'  Liant  Formulation  'Peinture  anticorrosion'  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Application of coatings is one of the most suitable, less expensive and efficient methods of corrosion and wear control. Due to the high cost and erratic availability of various raw materials used in coatings, the need exists for search of alternate materials that are low cost, indigenously available and can be used with commercial gains. An attempt has been made in the present study to use low cost and non-traditional materials in formulation of protective coatings. Studies were conducted on the use of fly ash, an industrial waste, as extender in coatings. Simultaneously, epoxy ester resins were prepared using mahua oil, a non-traditional oil of abundant availability. The resins were characterised by IR spectroscopy and their physico-chemical and film properties were determined. Fly ash coatings were formulated using epoxy ester resins based on mahua oil. The coatings were characterised by standard methods (IS: 101-1992) for various properties, particularly for their resistance to corrosion and abrasion. The observations indicate that the use of fly ash in coatings results in improved resistance to corrosion against chemicals and abrasion. It was found that the use of fly ash had no adverse effect on coating properties. The mahua oil based epoxy ester resins gave non air-drying films and were therefore applied as baking systems with 20% melamine formaldehyde (MF). The development of the above fly ash coatings will simultaneously lead to the safe disposal of fly ash. Note de contenu : - EXPERIMENTAL : Raw materials - Characterisation of fly ash and mahua oil - Isolation of fatty acids from mahua oil - Formulation of mahua fatty acids (MFA) based epoxy ester resins - Preparation of resins and their modification - Characterization of the resins - Preparation and characterisation of fly ash coatings based on MFA epoxy esters - Characterization of coatings - RESULTS AND DISCUSSION : Properties of fly ash - Characterization of MFA based epoxy ester resins - Physico-chemical properties - Film properties - Water, chemical and solvent resistence - Characterization of fly ash coatings based on MFA epoxy ester - Coating properties - Corrosion resistance - Abrasion resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12624 [article]

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Radiation curing printing inks and varnishes - Possibilities and limitations of an innovative technology / Stefan J. Eder in PAINTINDIA, Vol. LI, N° 10 (10/2001)

[article]  inPAINTINDIA > Vol. LI, N° 10 (10/2001) . - p. 73-76 Titre : Radiation curing printing inks and varnishes - Possibilities and limitations of an innovative technology Type de document : texte imprimé Auteurs : Stefan J. Eder, Auteur Année de publication : 2001 Article en page(s) : p. 73-76 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Faisceau  électronique'  'Rayonnement  UV'  Durcissement  Encre  Vernis  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Is ultra-violet and electron beam curing the magic key to environment-friendly, solvent-free laminating, gluing, printing and varnishing ? Is curing and drying of chemical coatings by radiation the future-oriented technology for the 21st century, or possibly "old hat", a technique used successfully already by the ancient Egyptians to mummify their dead, but that has to date never really "caught on" ? ; perhaps no more than just niche technology for radiation freaks ? Note de contenu : - Coventional or radiation curing ? - UV or EBC ? - Free radical or cationic ? - Trends ? Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12625 [article]

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