Highly effective emulsion processes for low to zero VOC epoxy emulsions / Jonathan Huang in PAINTINDIA, Vol. LXVII, N° 9 (09/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 9 (09/2017) . - p. 72-76 Titre : Highly effective emulsion processes for low to zero VOC epoxy emulsions Type de document : texte imprimé Auteurs : Jonathan Huang, Auteur ; Wolfgang Geuking, Auteur ; Steven Chan, Auteur ; Nathan Noyes, Auteur ; Jo Grade, Auteur Année de publication : 2017 Article en page(s) : p. 72-76 Langues : Anglais (eng) Catégories : Brillance (optique) Dureté (matériaux) Emulsions Epoxydes Essais (technologie) Polymérisation en émulsion Résistance chimique Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Water borne epoxy resins are gaining popularity in many applications, not the least due to their low or even zero content of volatile organic compounds (VOC). This paper is aiming at describing the principles of epoxy resin emulsification as well as demonstrating the practical ways to produce such emulsions in a variety of different equipments. Note de contenu : - Plan of trials - Emulsion properties - Paint properties - Hardness - Gloss - Chemical resistance toughness En ligne : https://drive.google.com/file/d/1hO7z1EkMjhwt1P7WXbVBUp4x11OE4O_D/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29332 [article]

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Natural advantages / Erwin Honcoop in EUROPEAN COATINGS JOURNAL (ECJ), N° 04/2008 (04/2008)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 04/2008 (04/2008) . - p. 22-26 Titre : Natural advantages : Fatty acid dimers give UV-PUDs fast drying and good resistance properties Type de document : texte imprimé Auteurs : Erwin Honcoop, Auteur ; Hans Ridderikhoff, Auteur ; Wolfgang Geuking, Auteur Année de publication : 2008 Article en page(s) : p. 22-26 Langues : Anglais (eng) Catégories : Acides gras Dimères Polyesters Polyols Polyuréthanes Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : A range of polyester polyols based on dimerised fatty acids was produced and evaluated in both conventional and UV-curable polyurethane dispersions. Their highly hydrophobic nature and lack of ether bonds result in good hydrolytic stability, fast water release on drying and resistance to degradation by UV light and moisture. En ligne : https://drive.google.com/file/d/1SKmzkekdLKGW7ofso2GokG1lPPLqY4p8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2402 [article]

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Non-migratory surfactants in emulsion polymerisation / Jo Grade in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4627 (12/2016)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4627 (12/2016) . - p. 16-18, 21 Titre : Non-migratory surfactants in emulsion polymerisation Type de document : texte imprimé Auteurs : Jo Grade, Auteur ; Wolfgang Geuking, Auteur Année de publication : 2016 Article en page(s) : p. 16-18, 21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs sensibles à la pression Emulsions -- Stabilité Latex Polymérisation en émulsion Revêtements en bâtiment:Peinture en bâtiment Revêtements protecteurs Stabilisants (chimie) Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : There are waterborne binders with enhanced dry film properties and present application data comparing conventional and copolymerisable surfactants. Surfactants are essential components in the synthesis of emulsion polymers for controlling particle size and colloidal stability of the latex and in downstream formulations. Common surfactants used in latex synthesis, however, have poor compatibility with the hydrophobic polymer phase. Surfactant desorption in the wet state can cause particle flocculation upon storage or handling. Poor stability during film formation has a dramatic effect on dry film properties. Porous films result with poor pigment binding and protective properties. Phase separation and accumulation of surfactant into hydrophilic domains during film formation affects water whitening, blocking resistance and mechanical properties. Non-migratory surfactants (NMS) become grafted on to the surface of polymer particles. Latex stability is enhanced, which positively affects shelf life, formulation ease and barrier properties. Use of reactive surfactants is relevant for various application areas : - Architectural coatings with better pigment binding properties - Protective coatings with superior barrier properties or lower water diffusion rates - Pressure sensitive adhesives with superior mechanical properties This paper presents application data comparing conventional and copolymerisable surfactants. NMS technology allows development of waterborne polylmer systems and dry films that does notshow the drawbacks commonly associated with the presence of surfactants. Note de contenu : - SURFACTANTS AS ROOT CAUSE FOR POOR PERFORMANCE - PROPERTIES AFFECTING SURFACTANT FAILURE : Latex stability - Protective and adhesive properties of the dry film - Appearance - NON-MIGRATORY SURFACTANTS FOR EMULSION POLYMERS WITH ENHANCED PERFORMANCE - PRODUCTS - FORMULATING WITH REACTIVE SURFACTANTS - TARGET END USES OF EMULSION POLYMERS STABILISED WITH REACTIVE SURFACTANTS - EXPERIMENTAL : Reactivity of maxemul surfactants - Effects of reactive group on polymer mw - Enhanced barrier properties of a styrene acrylic latex - Reduced water whitening and water uptake for an All acrylics latex - Surfactant leaching and snail trail from a StyAcr based low PVC paint - Superior water repellency for a medium PVC paint based on WAP modified StyAcr binder - Non-migratory surfactants in emulsion polymerisation - PRESSURE SENSITIVE ADHESIVES : Superior water whitening resistance for a laminated PSA En ligne : https://drive.google.com/file/d/1pTBrQAXeRCh6p9TJpz35v0JPMvBVxsix/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27315 [article]

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Sustainable polyurethanes are here to stay / Wolfgang Geuking in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2021)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2021) . - p. 34-38 Titre : Sustainable polyurethanes are here to stay : Bio-based polyols provide flexible, versatile multi-substrate solutions Type de document : texte imprimé Auteurs : Wolfgang Geuking, Auteur ; Nathan Noyes, Auteur ; Eric Brouwer, Auteur Année de publication : 2021 Article en page(s) : p. 34-38 Langues : Anglais (eng) Catégories : Biopolymères Colles:Adhésifs Durée de vie (Ingénierie) Matériaux -- Allègement Polyesters Polyols Polyuréthanes Résistance à l'humidité:Résistance à l'eau Résistance thermique Index. décimale : 667.9 Revêtements et enduits Résumé : The polyester polyols presented in this paper are based on C36-dimer acids from natural oils, giving these products high renewable content. To meet industry's need to move towards sustainable and bio-based materials, a new portfolio of 100 0/0 bio-based-polyester polyols have been developed. The branched non-crystalline dimer-acid structure offers (low temperature) flexibility, prevents strain-induced crystallisation and enhances wetting properties, while the hydrocarbon character imparts water repellence and affinity for a wide range of substrates. Furthermore, they provide a unique combination of enhanced hydrolytic and thermo-oxidative stability, which is highly relevant for demanding applications such as transportation and electronic adhesives or renewable energy systems. Note de contenu : - Changing needs for a changing world - Bio-based-polyol technology - New 100% bio-ased polyols for polyurethane adhesives - Highly durable polyurethane adhesives - Exposure trials - Flexibility and reduced flex fatigue - Versatile adhesion - Life-cycle analysis - Measuring bio-content - Sustainability in use - Fig. 1 : Thermo-oxidative and hydrolytic resistance of bio-based, reactive PU-adhesive films - Fig. 2 : Elongation curves for adhesives films - Fig. 3 : Adhesion to a variety of difficult to bond substrates - Fig. 4 : Adhesion to polycarbonate - Fig. 5 : Adhesion after exposure to high humidity - Fig. 6 : Typical life-cycle analysis of cumulated CO2 equivalent absorption and emissios for fossil fuel-based and biobased products - Fig. 7 : Reduced fuel consumption due to light weightingin cars, enabled by bio-based adhesives - Table 1 : Bio-based-polyol grades En ligne : https://drive.google.com/file/d/1UT0AfpRUKppLatm1Mmz-nFvGy9COVskO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35862 [article]

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