Photoinitiators and photosensitizers of polymerization : A short review / Jean-Pierre Fouassier in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/96 (06/1996)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6/96 (06/1996) . - p. 412-419 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 relationships Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11296 [article]

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UV drying : The first industrial one step process / Jean-Pierre Fouassier in EUROPEAN COATINGS JOURNAL (ECJ), N° 4/95 (04/1995)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4/95 (04/1995) . - p. 272-276 Titre : UV drying : The first industrial one step process Type de document : texte imprimé Auteurs : Jean-Pierre Fouassier, Auteur ; L. Simonin-Catilaz, Auteur Année de publication : 1995 Article en page(s) : p. 272-276 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couches épaisses Photochimie Réticulation (polymérisation) Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : The authors set out to investigate the various possibilities of UV- and visible light reticulation of thick, pigmented media usable in the paint industry. A new system, polymerizing paints of various colours at the thicknesses required by the household furniture industry, was worked out (> 100 μm). This is a one step process, with a working speed of 10 ml min, involving four 80 W/cm lamps. This is the only present-day system capable of working under industrial conditions. Note de contenu : - Fundamentals of a radical polymerization reaction III- Experimental : 1) Products (a. Functionalized oligomers - b. Acrylic monomers, c. Concentrated pigment bases) - 2) Procedure (a. Calculating the maximum thickness of the polymererized layer of a formulation for a given illumination time - b. Estimating the illumination time required for the polymerization of a layer whose thckness was fixed beforehand - c. Drying unit) - Polymerization prospects of a pigmented coating : 1) First generation initiators - 2) Effectiveness of the TPO-1184 system - 3) Advantages and limits of use of TPO in a pigmented medium - Polymerization reactions sensitized in the presence of dyestuffs - Hybrid initiating systems in acrylate oligomers : 1) Association of a radial initiator with an organometallic compound - 2) Association of a radical initiator with a peroxide - The new system : Effectiveness in pigmented media : 1) Difference in reactivity according to pigment colour (a. On the labotary scale - b. On the industrial scale) - 2) Differences in reactivity according to the nature of the polymer Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11301 [article]

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UV printing on textile fabrics / Jean-Pierre Fouassier in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/95 (03/1995)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3/95 (03/1995) . - p. 152-160 Titre : UV printing on textile fabrics Type de document : texte imprimé Auteurs : Jean-Pierre Fouassier, Auteur ; F. Buat, Auteur ; J. J Donzé, Auteur ; R. Freytag, Auteur Année de publication : 1995 Article en page(s) : p. 152-160 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Impression sur étoffes Pâtes d'impression Photochimie Rayonnement ultraviolet Tissés Index. décimale : 667.9 Revêtements et enduits Résumé : A UV-curable formulation has been developed for printing (in red, yellow, blue, orange, green, violet...) on textile fabrics. It exhibits a high reactivity (1.5 m/mn under one 80 W/cm mercury lamp) and yields a printed fabric having final properties similar to that achieved by using the conventional thermal process: rubbing, washing, dry cleaning and light fastness Note de contenu : FUNDAMENTALS OF PIGMENT PRINTING : Composition of the conventional, thermally crosslinked printing paste - Composition of the photochemically crosslinked printing paste - Advantages and disadvantages of the two methods - Crosslinked photopolymerization (photoinitiators, monomers and oligomers - EXPERIMENTAL : Formulation of the photochemically crosslinkable printing paste (The binder, the thickening agent, the emulsifying agent, the pigments, the photoinitiating systems) - Preparation and printing on the textile material (The textile material, roller printing, the illumination technique) - The test methods - Reference printing : thermal crosslinking polymerization - RESULTS AND DISCUSSION : The search of a "universal" photoinitiator - Colour blending - Light-fastness - DISCUSSION AND CONCLUSION : The components of the paste - The equipment - The superposition of photosensitive layers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11274 [article]

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