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Lead-free coloured gelcoats in automotive applications / Franziska Pfeffer in JEC COMPOSITES MAGAZINE, N° 27 (08-09/2006)
[article]
Titre : Lead-free coloured gelcoats in automotive applications Type de document : texte imprimé Auteurs : Franziska Pfeffer, Auteur Année de publication : 2006 Article en page(s) : p. 56-57 Langues : Anglais (eng) Tags : Automobile Utilisation 'Composé azoïque' 'Pigment organique' Polymère 'Matériau revêtement' Index. décimale : 668.4 Plastiques, vinyles Résumé : Since June 2005, toxic heavy-metal pigments containing lead, cadmium, chrome VI and mercury have been restricted by the general EU directive 98/24/EG. This presents a challenge, and not just when it comes to matching colours. Note de contenu : - Responsible care and compromises
- ChemistryPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13945
in JEC COMPOSITES MAGAZINE > N° 27 (08-09/2006) . - p. 56-57[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005546 - Périodique Bibliothèque principale Documentaires Disponible Organotin copolymer binders for self polishing antifouling paints (SPC's) : Performance of SPC A/F paints in relation to polymerization conditions and binder composition / S. Pal in PAINTINDIA, Vol. XLVI, N° 4 (04/1996)
[article]
Titre : Organotin copolymer binders for self polishing antifouling paints (SPC's) : Performance of SPC A/F paints in relation to polymerization conditions and binder composition Type de document : texte imprimé Auteurs : S. Pal, Auteur Année de publication : 1996 Article en page(s) : p. 29-34 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture antisalissure' Liant 'Copolymère étain' 'Acrylique dérivé copolymère' Copolymérisation 'Méthacrylique acide ester méthyle' tributylstannyle' butyle' Amorceur 'Peroxyde organique' 'Composé azoïque' Performance 'Protection Etude expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Effect of different processing variables e.g. organic initiator concentration, polymerisation temperature, monomer combination, monomer ratio on properties of organotin acrylic copolymers have been studied. A series of organotin acrylic copolymer of varying tin content, molecular waight, monomer combination and monomer ratio has been synthesised by copolymerising Tributyl tin methacrylate monomer (TBTM) with Methyl methacrylate (MMA) and MMA/Butyl acrylate (BA) combination. Organic peroxides and azo compounds of varying H-abstracting abilities and half life were employed as initiators. Azo bis isobutyro nitrile (AIBN) initiator has been found to be an effective initiator in synthesis of organotin copolymers with very low level of residual monomers. Polymerisation temperature above 140°C is having a detrimental effect on properties of organotin copolymers. IR spectrometry, atomic absorption spectrometry, Gas liquid chromatography and viscosity measurements were used to evaluate the organotin acrylic polymers.
Self polishing co-polymer A/F Paints (SPCs) with varying tin content and volume solids were formulated using these synthesised organotin copolymers. Influence of different processing variables and binder composition on performance and effectiveness of SPC A/F paints have been evaluated by measuring the dry film thickness over a definite interval of time i.e. erosion rate & degree of fouling. It has been found that polishing rate of these SPC A/F paints depends on the ratio of methyl methacrylate & TBTM and on the nature of acrylate monomer used. Ratio of MMA/TBTM is inversely proportional to erosion rate of SPC's. BA/MMA/TBTM based organotin copolymer has faster rate of polishing than MMA/TBTM based copolymers.Note de contenu : - WORK DONE ON SELF POLISHING A/F PAINTS (SPCs) - Major advantages of Self Polishing Copolymer AF paints (SPCs)
- EXPERIMENTAL - Self polishing antifouling paints formulations
- TEST METHODS - Characterization of copolymers and tributylt in methacrylate (TBTM) monomer
- RESULTS AND DISCUSSION - Synthesis of tributyl tin methacrylate monomer (TBTM)Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13473
in PAINTINDIA > Vol. XLVI, N° 4 (04/1996) . - p. 29-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006503 - Périodique Bibliothèque principale Documentaires Disponible Study of hetero-functional initiators for acrylic coatings resins / Bharat J. Udeshi in PAINTINDIA, Vol. XLV, N° 12 (12/1995)
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Titre : Study of hetero-functional initiators for acrylic coatings resins Type de document : texte imprimé Auteurs : Bharat J. Udeshi, Auteur Année de publication : 1995 Article en page(s) : p. 29-36 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture haute teneur solide' Liant 'Acrylique dérivé polymère' Préparation 'Polymérisation radicalaire' 'Amorceur 'Composé azoïque' 'Etude expérimentale' Azonitrile '2,2p-Diazènediisobutyrique acide ester diméthyle' Index. décimale : 667.9 Revêtements et enduits Résumé : The initiator plays a dominant role in the free radical synthesis of acrylic based coating resins. Both the chemical nature of the initiator and the polymerization conditions greatly influence the efficiency of the polymerization and the final resin properties. The effect was examined of change in side chain group in azo initiator with replacement of nitrile group to isobutyrate group with no major change in initiator half-life temperature, on the viscosity, solubility and MWD of acrylic resins produced by solution polymerization using them. Best solution in wide range of solvents,ranging from aromatic - ester - aliphatic solvent class, was achieved with 2,2'-azobis(methyl isobutyrate) v/s selected azonitrile initiators and its versatility was seen for preparing a range of resins with low MW, narrow polydispersity, low viscosity and reduced volatiles. Work was also reported on comparing the azo initiator efficiency og 2,2'-azobis ( methyl-isobutyrate) v/s alkyl perester initiator, tert-butyl perbenzoate and tert-butyl perisononanoate. Weathering performance of acrylic/isocyanate clear coasts using resins prepared with some of the initiators is reported. Note de contenu : - Experimental design : - Resin synthesis - Initiators - Characterization
- Coating formulations, preparation and properties
- Results and discussion : - High-solid acrylic resin - Mineral turpentine thinnable acrylic resin - Initiator selection - Film propertiesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13639
in PAINTINDIA > Vol. XLV, N° 12 (12/1995) . - p. 29-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006459 - Périodique Bibliothèque principale Documentaires Disponible