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Initiators for water-based acrylate emulsion polymerizations / Lea L. Anderson in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 855 (04/1996)
[article]
Titre : Initiators for water-based acrylate emulsion polymerizations Type de document : texte imprimé Auteurs : Lea L. Anderson, Auteur ; Wilfried M. Brouwer, Auteur Année de publication : 1996 Article en page(s) : p. 75-79 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amorceurs (chimie)
Polyacryliques
Polymérisation
Revêtements en phase aqueuse:Peinture en phase aqueuseTags : 'Amorceur radicalaire' Perester 'Hydroperoxyde organique' 'Activité amorceur' 'Polymérisation rédox' 'Copolymérisation émulsion' Terpolymérisation Latex 'Acrylate butyle copolymère' 'Styrène 'Vinylique acétate 'Méthacrylate de méthyle 'Méthacrylique acide 'Etude expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Traditionally persulfates have been used as initiators in redox water-based polymerization systems. While persulfates are still used, the use of organic peroxides has increased during the past decade. This paper summarizes work which shows that organic peroxides can be used as highly effective monomer scavengers to reduce the levels of unreacted residual monomer in a latex. In addition, organic peroxides can be used in place of persulfates for initiating a redox polymerization and offer some advantages over persulfates. Note de contenu : - Styrene/n-butyl acrylate (40:60) latex
- Vinyl acetate/n-butyl acrylate/methacrylic acid (83:15:2) latex
- N-butyl acrylate/methacrylate/methacrylic acid (52:46:2) latex
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18336
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 855 (04/1996) . - p. 75-79[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003515 - Périodique Bibliothèque principale Documentaires Disponible 003525 - Périodique Bibliothèque principale Documentaires Exclu du prêt Photoinitiators and photosensitizers of polymerization : A short review / Jean-Pierre Fouassier in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/96 (06/1996)
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Titre : Photoinitiators and photosensitizers of polymerization : A short review Type de document : texte imprimé Auteurs : Jean-Pierre Fouassier, Auteur Année de publication : 1996 Article en page(s) : p. 412-419 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Amorceur radicalaire' cationique' anionique' 'Relation structure activité' 'Activité amorceur' 'Polymérisation photochimique' Photoamorceur Index. décimale : 667.9 Revêtements et enduits Résumé : The UV curing of coatings offers various economic advantages over orthodox technologies. It is the photoinitiator that has been found to represent a key factor in the efficiency of this type of reaction. The following article provides an overview of different chemistries and an approach to the photochemical reactivity of these molecules. Note de contenu : - The basic photo-chemical process in light-induced reaction
- The radical photopolymerization reactions
- Main classes of radical photoinitiators sensitive in the UV wavelenght range : 1) Basic photoinitiators - 2) Photoinitiators exhibing particular properties - 3) Synergistic effects - 4) Visible photoinitiators
- Cationic photoinitiators
- Anionic photoinitiators
- Charge transfer initiation
- Laser induced polymerization
- Structure/reactivity relationshipsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11296
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6/96 (06/1996) . - p. 412-419[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002516 - 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