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Polymer heterogeneity in waterborne coatings / Ad Overbeek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 1 (01/2010)
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Titre : Polymer heterogeneity in waterborne coatings Type de document : texte imprimé Auteurs : Ad Overbeek, Auteur Année de publication : 2010 Article en page(s) : p. 1-21 Note générale : Bibliogr. Langues : Américain (ame) Tags : Coating Heterogeneous Waterborne Gloss Adhesion Nano-structured Hybrid Index. décimale : 667.9 Revêtements et enduits Résumé : An overview is presented of the progress in understanding polymer heterogeneity over the last 20 years and how this has contributed to the improvement of coatings. Solvent-based polymers are homogeneous in nature, since all polymeric materials tend to be dissolved in the same solvent mixture. This is different for most waterborne polymers, which tend to be present in a compartmentalized way. Most polymeric materials are present in particles, which are separated by the continuous aqueous phase. This gives excellent opportunities to create particle morphologies that form the basis for the film morphology after drying of the coating. This article gives an overview of the various types of heterogeneity which are accessible in waterborne polymers and will show how heterogeneity in the polymer can contribute to the solution of several persistent problems of the coating industry. DOI : 10.1007/s11998-009-9201-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9201-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8343
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 1 (01/2010) . - p. 1-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011962 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Prolonged open time : for new generation decorative paints Type de document : texte imprimé Auteurs : Ad Overbeek, Auteur ; Jan Bouman, Auteur ; Ronald Tennebroek, Auteur Année de publication : 2002 Article en page(s) : p. 38-46 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The growth of waterborne paints in the higher performance decorative paint segments has been slowed down due to a lack of open time, rheology, film build and scratch resistance. Over the years the improvement of the open time has been an intense area of research, but to date the typical paint rheology and brushing performance of a solvent based paint could not be achieved in a waterborne system. Very low viscosity oligomers are a solution for the open time problem. These oligomers remain liquid even after the evaporation of water and are self-crosslinking to achieve good final properties. The oligomers are combined with a dispersed polymer to reduce tack free times of the resulting coatings and to increase the rate of development of the properties. A model system is described where this effect is demonstrated. Note de contenu : - Synthesis of model systems
- Test methods for wet edge open time, dust free and tack free time.
- Phase inversion point - a critical point
- Change in rheology during drying
- Closing the paint
- Drying at different blend ratios of oligomer and polymer
- New technology compared to commercial paintsEn ligne : https://drive.google.com/file/d/12U78JR2RIRI87w4I18AM2aXG2Yl3d9ag/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10709
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10/02 (10/2002) . - p. 38-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000648 - Périodique Bibliothèque principale Documentaires Disponible Self-crosslinkable urethanes and urethane/acrylics / Ronald Tennebroek in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/97 (11/1997)
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Titre : Self-crosslinkable urethanes and urethane/acrylics Type de document : texte imprimé Auteurs : Ronald Tennebroek, Auteur ; J. Geurts, Auteur ; Ad Overbeek, Auteur ; André S. Harmsen, Auteur Année de publication : 1997 Article en page(s) : p. 1016-1021 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dureté (matériaux)
Polyacrylates
Polyurée
Polyuréthanes
Résistance à l'abrasion
Résistance chimique
Réticulation (polymérisation)
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Aqueous polyurethane dispersions are widely used in the coatings industry because of their high performance. A new technology has been developed to achieve enhanced properties of aqueous urethanes and urethane-acrylics through the design of unique (self-)crosslinkable polyols. Synthesis and properties of a wide range of urethanes and urethane-acrylics with varying crosslink densities and morphology will be discussed. Note de contenu : - Urethane properties
- Aqueous polyurethane dispersions - General composition - Synthesis
- One component self-crosslinkable urethane dispersions
- Comparison between autoxidative and azomethine crosslinking
- Comparison of urethane/acrylate composites with urethane/acrylate blends
- Results and discussion
- Mechanical properties
- Chemical resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11437
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11/97 (11/1997) . - p. 1016-1021[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002533 - Périodique Bibliothèque principale Documentaires Disponible Self-crosslinking surfactant free acrylic dispersions / Fred Bückmann in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/01 (06/2001)
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Titre : Self-crosslinking surfactant free acrylic dispersions Type de document : texte imprimé Auteurs : Fred Bückmann, Auteur ; Ad Overbeek, Auteur ; Tijs Nabuurs, Auteur Année de publication : 2001 Article en page(s) : p. 53-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Surfactant free acrylic dispersions with a core-shell particle morphology are described, where the shell polymer is a self-crosslinking polymeric dispersant used for the stabilisation of the polymer particle. The phase ratio's and the magnitude in which the Tq's of the polymeric dispersant and the subsequently formed polymer differ were found to be of crucial importance to obtain a very low MFT and hence very good film formation combined with very high hardness and good anti blocking properties. In addition films cast from these dispersions have excellent chemical resistances which make these dispersions very useful as binders for high performance coating systems. Note de contenu : - Polymer entanglement is crucial for film formation
- Hydrophilic low molecular weight polymer backbones
- Sequential polymerisation for phase separated particle morphologies
- Crosslinking for improved chemical resistance
- The role of the surfactant
- Concept of surfactant free dispersions with self dispersing polymers
- Polymeric self-crosslinking surfactant
- Properties of polymeric self-crosslinking surfactant
- The effect on film formation
- Investigating model dispersions
- Application in high performance coatings
En ligne : https://drive.google.com/file/d/1WE47U7biHXhhSqMNLtu5nlFDSZNj63yi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10954
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6/01 (06/2001) . - p. 53-60[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000952 - Périodique Bibliothèque principale Documentaires Disponible Self-crosslinking surfactant free acrylic dispersions / Fred Bückmann in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/01 (07-08/2001)
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Titre : Self-crosslinking surfactant free acrylic dispersions Type de document : texte imprimé Auteurs : Fred Bückmann, Auteur ; Ad Overbeek, Auteur ; Tijs Nabuurs, Auteur Année de publication : 2001 Article en page(s) : p. 53-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Surfactant free acrylic dispersions with with a core-shell particle morphology are described, where the shell polymer is a self-crosslinking polymeric dispersant used for the stabilisation of the polymer particle. The phase ratio's and the magnitude in which the Tg's of the polymeric dispersant and the subsequently formed polymer differ were found to be of crucial importance to obtain a very low MFT and hence very good film formation combined with very high hardness and good anti blocking properties. In addition films cas from these dispersions have excellent chemical resistances which make these dispersions very useful as binders for high performance coating systems. Note de contenu : - POLYMER ENTANGLEMENT IS CRUCIAL FOR FILM FORMATION
- HYDROPHILIC LOW MOLECULAR WEIGHT POLYMER BACKBONES : Water acts as plasticizing agent - Additional crosslinking to overcome poor water resistance
- SEQUENTIAL POLYMERISATION FOR PHASE SEPARATED PARTICLE MORPHOLOGIES : Low Tg for film formation plus high Tg for durability - Core/shell emulsions usually require surfactant
- CROSSLINKING FOR IMPROVED CHEMICAL RESISTANCE : Reaction between polymer chains or emulsion particles - A variety of crosslinking mechanisms
- THE ROLE OF THE SURFACTANT : Migration is a problem - Copolymerisable surfactants - reactivity is difficult to adjust - Polymeric surfactants with reduced mobility - Stabilisation by anionic initiators - only for low solids
- CONCEPT OF SURFACTANT FREE DISPERSIONS WITH SELF DISPERSING POLYMERS : Creation of core/shell particles through secondary dispersion - More rapid buildup of toughness and resistance
- POLYMERIC SELF-CROSSLINKING SURFACTANT
- PROPERTIES OF POLYMERIC SELF CROSSLINKING SURFACTANT : Surface tension is reduced effectively - Stable dispersion with low particle size - Core/shell geometry verified
- THE EFFECT ON FILM FORMATION : Crosslinks at the particle surface are mos effective - Crosslinking both core and shell polymers - Surfactant does not exude
- INVESTIGATING MODEL DISPERSIONS : Tg affects surface hardness - Acid value influences MFT but not hardness - Very good blocking properties with low Tg material
- APPLICATION IN HIGH PERFORMANCE COATINGS : Translucent industrial wood coatings with excellent wetting - Flexible and anti-blocking coatings for joineryPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33499
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/01 (07-08/2001) . - p. 53-60[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000636 - Périodique Bibliothèque principale Documentaires Disponible