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Titre : Faster finishing : Benefits of waterborne UV curable resins on flexible substrates Type de document : texte imprimé Auteurs : Mark Gilbert, Auteur ; Terri Carson, Auteur ; Laurie Morris, Auteur Année de publication : 2014 Article en page(s) : p. 16-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Photoamorceurs (chimie)
Polyuréthanes
Vernis -- Séchage sous rayonnement ultraviolet
Vernis en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The chemistry and curing requirements of waterborne UV PUD coatings are outlined. Isocyanate-cured waterborne PUDs are widely used as leather coatings. Two such coatings were modified by inclusion of UV-curable PUDs. The UV coatings showed very good performance, with the advantage that final properties are attained very rapidly after curing. Note de contenu : - Chemistry of UV curing outlined
- UV PUDs have some unique advantages
- Why photoinitiator selection is critical
- Photoinitiator and pigment affect lamp selection
- Formulation and application of experimental coatings
- Good flexibility and blocking performance
- Good resistance properties are achieved rapidly
- UV PUDs offer a high-quality finishing systemEn ligne : https://drive.google.com/file/d/1-FevW0lIFKn3X6tmIsjbu5ef3Rz2aggG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22065
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2014) . - p. 16-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16560 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Faster surface drying : How to reduce photoinitiator concentration without compromising drying speed of UV LED curable coatings and inks Type de document : texte imprimé Auteurs : Kevin Poelmans, Auteur ; Carmen van Vaerenbergh, Auteur ; Steven Cappelle, Auteur ; Jo Ann Arceneaux, Auteur Année de publication : 2018 Article en page(s) : p. 44-49 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amino-acrylate
Diodes électroluminescentes
Encre -- Séchage sous rayonnement ultraviolet
Encre -- Additifs
Photoamorceurs (chimie)
Vernis -- Additifs
Vernis -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : Amino acrylates can make a significant contribution to UV LED curing technology, to either increase the UV LED cure response at existing PI concentrations, or maintain UV LED cure speed at reduced PI concentrations. An example LED booster is typically used at 5 to 20 wt% in the formulation. Note de contenu : - Oxygen-related challenges
- New chemical solutions
- A surface cure booster
- Optimising PI levels
- UV LED curable flexo ink formulations
- The way forward
- Fig. 1 : Photoabstraction reactions with Speed cure DETX and amine
- Fig. 2 : Reactivity in m/min with 8W/cm2 365-nm LED
- Fig. 3 : Yellowing data for cured clear coats
- Fig. 4 : Impact of LED equipment on cure speed emission wavelength vs peak irradiance
- Fig. 5 : Effect of halving photoinitiator content on cure speed
- Fig. 6 : UV LED cure response in UV flexo inks
- Table 1 : Composition of UV LED clear coat
- Table 2 : Detailed description of cyan ink formulations
- Table 3 : Halving the PI content in ink formulationsEn ligne : https://drive.google.com/file/d/1V1h-2lXzN8GJThIf8NeXcDx5fyWBMVIK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30724
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2018) . - p. 44-49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20010 - Périodique Bibliothèque principale Documentaires Disponible Formulating strategies for low migration and low odour products / Susan E. Bailey in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4602 (11/2014)
[article]
Titre : Formulating strategies for low migration and low odour products Type de document : texte imprimé Auteurs : Susan E. Bailey, Auteur Année de publication : 2014 Article en page(s) : p. 14-15 Langues : Anglais (eng) Catégories : Emballages
Monomères
Oligomères
Photoamorceurs (chimie)
Revêtements -- Séchage sous rayonnement électronique
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : How radiation curing, both ultraviolet (UV) and electron beam (EB), can provide printed packaging with desired final properties without the bulk removal of solvent or water from a liquid formulation that forms a final coating product.
In the radiation curing process, UV light waves or high energy electrons impinge on the components of the formulated coating or ink to initiate the chemical reactions that form a crosslinked network of bonds between the components. Any components that do not react to incorporate into the polymer network are trapped within it ; however, they have the potential to migrate from the coating with exposure to heat, contact with similar materials or over time. Even though these components are minute constituents of the final film, they can migrate causing odour and impacting the coating performance. In certain applications,chemicals that can be released are regulated and need to be strictly controlled.
Figure 1 depicts a schematic of the liquid formulation containing monomers, oligomers and photoinitiator. After the cure reaction, many of the components are chemically bound. Residual monomer and photoinitiator molecules can remain unbound in the coating. Reactive end groups may still be present but bound to the polymer network through a different end of the molecule.
The strategies employed to create the desired look or performance of the coating or ink can often be in conflict with strategies to control the migration of materials in the final product. Considered selection of formulation components and the radiation curing system allow for both parts of the final product specification to be maintained.Note de contenu : - Photoinitiator considerations
- Monomer/oligomer selection
- Contributing factors
- Flexibility solution
- Balancing formulationEn ligne : https://drive.google.com/file/d/17YLrkbG6BsFu5WV3AVorWzixrxTlBjE0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22372
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4602 (11/2014) . - p. 14-15[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16675 - Périodique Bibliothèque principale Documentaires Disponible Futuristic photo-initiators that can upgrade conventional ultra-violet curing technology / Pradeep S. Verma in PAINTINDIA, Vol. LXVIII, N° 2 (02/2018)
[article]
Titre : Futuristic photo-initiators that can upgrade conventional ultra-violet curing technology Type de document : texte imprimé Auteurs : Pradeep S. Verma, Auteur Année de publication : 2018 Article en page(s) : p. 83-89 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzophénones
Photoamorceurs (chimie)
Photoréticulation
Polyéthylène glycol
Polymères hydrosolubles
QuinonesLes quinones constituent une série de diènes plutôt que des composés aromatiques comportant un noyau de benzène sur lequel deux atomes d'hydrogène sont remplacés par deux atomes d'oxygène formant deux liaisons carbonyles (dicétones éthylèniques conjuguées cycliques).
Les quinones sont des transporteurs d'électrons dans la membrane mitochondriale interne et dans la membrane des thylakoïdes.
Les principales quinones sont : la benzoquinone ou quinone (C6H4O2), découverte en 1838 par Wosrerenski, chimiste polonais, dont on utilise les propriétés rédox dans la technique de développement photographique. C'est l'un des deux isomères de la cyclohexadienedione. L'orthobenzoquinone est la 1,2-dione, alors que la parabenzoquinone, est la 1,4-dione.
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : This article represents work done on photoinitiators to enhance and upgrade the conventional mechanism of UV curable coatings. Hybrid organic—inorganic macro photoinitiator bearing pendant tertiary amine groups (0I-AH) was prepared by hydrolytic condensation of a silane containing amino groups. The macromolecular amino-functionalized photo-initiator was used in combination with Carnphor Quinone (CQ) for visible-light photo-polymerization. The evolution of monomer conversion versus irradiation time showed that the 0I-AH are efficient co-initiator of CQ because a fast reaction and hie, conversion result after 60 s irradiation with a LED source of 600 mW/cm2.
Polymerizable organosilicon macromolecular photo-initiator HHMP-Si-CC not only spontaneously form a
concentration gradient in the photo-polymerization system, initiate gradient photo-polymerization and effectively
mitigate inhibition of oxygen, but also overcome the migration of photolysis fragments of the photo-initiator from UV-curable material. HHMP-Si-CC should have potential applications for preparing more environnnentally friendly gradient materials.
A novel polymeric photo initiator, poly (glycidyl benzophenone ether) (PGBE), with a side-chairs benzophenone (BP) group was synthesized from poly(epichlorohydrin) and 4-hydroxybenzophenone. The obvious advantage of this initiator was the elimination of amine based hydrogen donors and to provide alternative hydrogen donors with easy availability and non-toxicity. The polymeric initiator was found to have higher efficiency than BP/E AB (Ethy14- dimethylaminolbenzoate).
Polymeric benzophenone photo-initiator (PEG-BP) was synthesized basing on polyethylene glycol (PEG), succinic anhydride, 4-hydroxy benzophenone and epichlorohydrin. The obvious advantage of this initiator was the elimination of amine based hydrogen donors and to provide alternative hydrogen donors with easily availability and non toxicity. The synthesized polymeric photo-initiators are attractive to.be used as type II photo-initiators. Moreover, the water solubility of PEG provides the use of initiating system in water-borne formulations. Therefore, it is expected that the synthesized polymeric photo-initiators are attractive to be used as type II photoinitiators.Note de contenu : - HYBRID ORGANIC-INORGANIC MACROMOLECULAR PHOTO-INITIATOR SYSTEM FOR VISIBLE-LIGHT PHOTO-POLYMERIZATION : Synthesis of hybrid organic-inorganic amine-functionalized photo-initiator (OI-AH)
- A NOVEL POLYMERIZABLE POLYSILOXANE α-hydroxyl alkylphenones photo-initiator
- NOVEL POLYMERIC PHOTO-INITIATORS WITH SIDE-CHAIN BENZOPHENONE : Synthesis and structural characterization of photo-initiators - UV/Vis spectral characterization of photo-initiators - Possible photoreaction mechanism of PGB
- NOVEL ONE-COMPONENT POLYMERIC BENZOPHENONE PHOTO-INITIATOR CONTAINING POLY(ETHYLENE GLYCOL) AS HYDROGEN DONOR : Synthesis of PEG-BP - Possible photoreaction mechanism of PEG-BP
- FIGURES : 1. Epoxy-amine reaction between TSPA and PGE to give the TSPAP silane - 2. Representative structures resulting from the hydrolytic condensation of TSPAP - 3. The structure was confirmed by FTIR, 1H NMR and UV-VIS spectroscopy - 4. FTIR spectra for HHMP and HHMP-Si-CC - 5. 1H NMR spectra of A-Si and HHMP-Si-CC - 6. UV-Vis absorption spectra of HHMP and HHMP-Si-CC - 7. Synthesis of poly(glycidyl benzophenone ether) - 8. 1H NMR spectra of PGBE and PECH - 9. UV/vis absorption spectra of BP and PGBE - 10. Synthesis route of PEG-BP - 11. FT-IR spectra of PEG-BP and EBPEn ligne : https://drive.google.com/file/d/1YF3Hxdz1_Vi8JkCnuDCy6fR-SVQ9ACRF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30343
in PAINTINDIA > Vol. LXVIII, N° 2 (02/2018) . - p. 83-89[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19765 - Périodique Bibliothèque principale Documentaires Disponible Getting photoinitiator type, amount and curing affect PSA performance / Zbigniew Czech in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/2010 (11/2010)
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Titre : Getting photoinitiator type, amount and curing affect PSA performance Type de document : texte imprimé Auteurs : Zbigniew Czech, Auteur ; Agnieszka Butwin, Auteur ; Janina Kabatc, Auteur Année de publication : 2010 Article en page(s) : p. 34-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet
Adhésifs sensibles à la pression
Adhésion
Cisaillement (mécanique)
Photoamorceurs (chimie)
Radicaux libres (chimie)
Résistance des matériaux
Réticulation (polymérisation)Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Pressure sensitive adhesive - Tests were carried out to examine the effects of variations in photoinitiator type and UV dose on the properties of a UV curable pressure-sensitive adhesive formulation. Six type II free radical photoinitiators were evaluated. The best balance of the three key properties tack, shear strength and peel adhesion was obtained when using 0.6-1.0 % Michler's ketone. En ligne : https://drive.google.com/file/d/1jrLCjeYs9ub-oI8LlXN0uUk5e7mc6V9Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10272
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11/2010 (11/2010) . - p. 34-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012594 - Périodique Bibliothèque principale Documentaires Disponible Grafting photoinitiators to acrylates / Richard Plenderleith in EUROPEAN COATINGS JOURNAL (ECJ), (07-08/2023)
PermalinkHigh performance UV curable PSAs offer high production speeds / James R. Erickson in ADHESIVES AGE, Vol. 41, N° 9 (09/1998)
PermalinkPermalinkHow to speed up the UV curing of water-based acrylic coatings / C. Decker in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 2 (04/2004)
PermalinkInfluence of different photoinitiatiors in the UV-LED curing of polyester acrylated varnishes / Ricardo Dossin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
PermalinkInfluence of radical photoinitiator content on UV curing process and UV-cured hybrid sol–gel films / Anaïs Even in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
PermalinkInitial photoyellowing of photocrosslinked / Katia Studer in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/01 (01-02/2001)
PermalinkInnovative self-initiating UV-curable polyurethane dispersions in COATINGS TECH, Vol. 17, N° 7 (07/2020)
PermalinkInvestigating the efficiencies of cationic photoinitiators / Joanna Ortyl in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 205, N° 4607 (04/2015)
PermalinkInvestigation of the effects of formulation on selected properties of UV curable IPN coatings / L. N. Price in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 885 (10/1998)
PermalinkKinetic elucidation of a novel photoproduct via irradiation of isopropylthioxanthone with maleic anhydride / Matthew E. Mullings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 3 (09/2007)
PermalinkKinetic studies of a UV-curable powder coating using photo-dsc, real-time / P. Castell in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
PermalinkLighting the way forward : radcure developments / Sandy Morrison in SURFACE COATINGS INTERNATIONAL, Vol. 95, 1 (02/2012)
PermalinkMould release potential of polydimethylsiloxane coatings using photoinitiated polymerisation / David P. Dworak in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
PermalinkMultifunctional photoinitiators (MFPIs) : A new concept / R. Burrows in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
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