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Improved durability through reactive dispersant technology / Steffen Onclin in COATINGS TECH, Vol. 15, N° 7 (07/2018)
[article]
Titre : Improved durability through reactive dispersant technology Type de document : texte imprimé Auteurs : Steffen Onclin, Auteur ; Kou Huiguang, Auteur ; Rainer Diehl ; Elena Martinez ; Clemens Auschra ; Andrew Recker ; Anthony Moy Année de publication : 2018 Article en page(s) : p. 22-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie)
Copolymère acrylique mélamine
Copolymères séquencés
Essai de dureté
Essais dynamiques
Granulométrie
Noir de carbone
Pâte pigmentaire
Pigments
Polymères à terminaison hydroxyle
Polyuréthanes
Revêtements -- Additifs:Peinture -- Additifs
Rhéologie
Vernis bi-composant
Vernis en phase aqueuse
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Even though formulation additives comprise only a minor part of a coating formulation, they can have pronounced effects on the physical properties of the final coating. This is especially true for pigment dispersants, which can enter a coating formulation “under the radar” through, for example, pigment pastes. As dispersants are often polar polymers with a low glass transition temperature, the interface between the pigment and continuous phase forms a weak point, especially in coatings designed for high durability. This article addresses the development of an improved dispersant technology. The dispersants are functionalized such that they become part of the continuous phase of the coating, improving overall film integrity. Application examples, in both waterborne and solventborne formulations, demonstrate the effects of reactive technology on mechanical and barrier properties in comparison to conventional systems. Note de contenu : - Effect of dispersants on coatings properties
- Dispersant with new anchoring chemistry
- Reducing negative impact of dispersants on coating properties
- Towards waterborne reactive dispersants
- Fig. 1 : Stabilization mechanisms of dispersants
- Fig. 2 : Effect of exchanging part of grinding resin with dedicated dispersant (internal BM 1) on pigment paste rheology and transparecy in a solventborne MS OEM system. Values in brackets reflect dispersant dosage (active dispersant on pigment)
- Fig. 3 : Pendulum hardness and MEK-rub test results of a solventborne MS-OEM basecoat after the addition of 20% pigment paste. Values in brackets reflect dispersant dosage (active dispersant on pigment). MEK-rubs were performed directly on the basecoat
- Fig. 4 : Mill base viscosities, fresh and after two weeks at 50°C, as a function of dispersant dosage. Pigment pastes are resin-free and contain 13% carbon-black
- Fig. 5 : Average particle size of pigment pastes as function of dispersant dosage. Particle size measurements were performed two days after pigment paste preparation
- Fig. 6 : Schematic representation of working principle of analytical ultra-centrifuge
- Fig. 7 : Dispersant adsorption in a solventborne, resin-free carbon black pigment paste, measured with an anlytical ultra-centrifuge. Effective (measured) dispersant on pigment is plotted againsf formulated dispersant on pigment
- Fig. 8 : Jetness and undertone values in a medium-solids OEM basecoat. Coatings were applied on a glass substrate and measurements wre taker from the backside (through the glass) to reduce surface effects
- Fig. 9 : Jetness and undertone values in a 2KPU topcoat. Coatings were applied on a glass substrate and measurements were taken from the backside (though the glass) to reduce surface effects
- Fig. 10 : Schematic representation of co-reactive dispersant concept. The dispersant becomes part of the continuous resin phase to improve film integrity
- Fig. 11 : Pendulum hardness and MEK-rub resistance of an MS-OEM basecoat. The MEK-rub test was performed directly on the basecoat
- Fig. 12 : Pendulum hardness and chemical resistance of a 2KPU topcoat, containing 20% pigment paste. Chemical resistance after 16h exposure. Chemical resistance rating : 5 = no change, 1 = strong change/damage
- Fig. 13 : Functionalization of block copolymer dispersants with hydroxyl-functional groups
- Fig. 14 : Pigment paste rheology (fresh) of resin-free pigment concentrates containing 18% PBk 7 and a DOP level of 100%. Jetness and undertone in a WB 1K acrylic melamine topcoat, applied on glass, after mixing with 20% pigment paste. Measurements were taken from the backside (though the glass)
- Fig. 15 : Pendulum hardness of WB 1K acrylic melamine topcoat containing 20% of carbon black pigment paste
- Fig. 16 : Chemical resistance of a 1k acrylic melamine topcoat, containing 20% pigment paste. Data after 16h exposure. Chemical resistance rating : 5 = no change, 1 = strong change/damageEn ligne : https://drive.google.com/file/d/1CDNJI6SBFF_mE-AMpYjliE_s5klSpHDp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31209
in COATINGS TECH > Vol. 15, N° 7 (07/2018) . - p. 22-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20270 - Périodique Bibliothèque principale Documentaires Disponible Life cycle assessment study on wood coatings / Berta Vega Sanchez in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2021)
[article]
Titre : Life cycle assessment study on wood coatings : Are water-borne systems really more sustainable than solvent-borne in this application ? Type de document : texte imprimé Auteurs : Berta Vega Sanchez, Auteur Année de publication : 2021 Article en page(s) : p. 26-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bilan des émissions de gaz à effets de serre
Bois -- Revêtements protecteurs
Bois -- Vernis
Durée de vie (Ingénierie)
Etudes comparatives
Polyuréthanes
Vernis bi-composant
Vernis en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Life cycle assessment (LCA) has become an important tool to quantify the environmental impact of products and industrial processes. It provides a full picture of the impact, in order to fine the best levers for improvement. This collaborative study analyses the environmental footprint from cradle to application to demonstrate the lower environmental impact of water-borne systems and identify the main levers for each technology. Note de contenu : - Using hardener technology to reduce environmental impact
- Key impact categories
- System boundaries and calculated assumptions
- Reducing the carbon footpring
- Wind power offers greatest GWP reduction
- Lower CFP but impact on eutrophication
- Reduce waste and solvent emission
- Renewable energyputs raw materials in top spot
- Limitation of the study
- Fig. 1 : System boundaries
- Fig. 2 : Carbon footprint breakdown - 1 m2 wood surface coated with clear-coat
- Fig. 3 : Photochemical ozone creation potential - 1 m2 wood surface coated with clear coat
- Fig. 4 : Influence of thermal energy source in the carbon footprint per m2 wood surface coated with clear-coat (EG :electrical grid/NG : steam from natural gas/renew : wind power
- Fig. 5 : Comparison of CFP per m2 wood surface coated with clear-coat with two systems and two different thermal energy sources for drying and curing (EG : electrical/renew : wind power) in comparison to the reference : 2K SB PU (EG)
- Table 1 : Wood coating systems in this study : 2K solvent-borne aliphatic polyurethane (2K SB PU), standard 2K water-borne polyurethane (2K WB PU) and fast-drying 2K water-borne polyurethane using novel hardener (novel 2K WB PU)En ligne : https://drive.google.com/file/d/1Hd9V-DJej3PfKOCX9M2esVpijHb068MI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35838
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 1 (01/2021) . - p. 26-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22760 - Périodique Bibliothèque principale Documentaires Disponible Mechanical properties of UV-waterborne varnishes reinforced by cellulose nanocrystals / Vahe Vardanyan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
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Titre : Mechanical properties of UV-waterborne varnishes reinforced by cellulose nanocrystals Type de document : texte imprimé Auteurs : Vahe Vardanyan, Auteur ; Bouddah Poaty, Auteur ; Gregory Chauve, Auteur ; Véronic Landry, Auteur ; Tigran Galstian, Auteur ; Bernard Riedl, Auteur Année de publication : 2014 Article en page(s) : p. 841-852 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Dispersions et suspensions
Matériaux nanocristallins
Polyuréthanes
Traîtements de surface
Vernis -- Propriétés mécaniques
Vernis en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : There are many instances in the literature of nanocellulose-thermoplastic composites, but there are few studies on coatings reinforced by cellulose nanocrystals (CNCs). The overall objective of this research was to develop organic nanoparticles-reinforced UV-water-based coatings for wood applications and to study the effect, mainly on wear properties, of the final composite coatings. CNC was mixed in the varnishes to improve the mechanical properties of the
coatings. One of the key aspects in the technology of nanocomposites remains the dispersion of the nanoparticles within the matrix as well as its affinity with the matrix. To quantify the dispersion, efficient methods of characterization are needed in order to reveal the nanosized particles. In this article, a novel characterization method based on atomic force microscopy was employed to characterize such nanocomposite coatings, by measuring surface nanoroughness, which is clearly correlated with quality of dispersion and mechanical properties. CNC was modified by either alkyl quaternary ammonium bromides or acryloyl chloride. The mechanical properties (abrasion and scratch resistances, hardness and adhesion) were analyzed and compared to the reference varnish without nanoparticles. The modified CNC addition in UV-water-based coatings results in an approximately 30–40% increase in wear resistance (abrasion and scratch), without any loss of appearance.Note de contenu : - INTRODUCTION : Waterborne coating - CNC - CNC dispersion characterization
- MATERIALS AND EXPERIMENTAL PROCEDURE : The composition of the formulation - CNC - Surface modification of cellulose nanocrystals - Preparation of formulations and samples - Experimental methods
- RESULTS AND DISCUSSION : Coating with unmodified CNC - Effect of surface modification of CNC - Mechanical properties of coatingsDOI : 10.1007/s11998-014-9598-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9598-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22308
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 841-852[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16659 - Périodique Bibliothèque principale Documentaires Disponible Meeting IKEA R1 requirements for coatings / Dirk Mestach in EUROPEAN COATINGS JOURNAL (ECJ), N° 12 (12/2022)
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Titre : Meeting IKEA R1 requirements for coatings : Water-borne one-component self-crosslinking polymer dispersions Type de document : texte imprimé Auteurs : Dirk Mestach, Auteur ; Marcel Meeuwisse, Auteur ; Nicole Verhagen, Auteur ; Ankie van Gorkum, Auteur Année de publication : 2022 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Auto-réticulation
Blanc (couleur)
Pâte pigmentaire
Polyacryliques
Revêtement monocomposant
Revêtements en phase aqueuse
Vernis en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Concern about sustainability and carbon footprints is increas¬ing demand for one-component coating systems compliant with DIN 68861 and the IKEA 105 MAT 0066. A coating composition has been developed, combining crosslinking chemistries and particle morphology. Increased crosslink density results in IKEA-compliant pigmented matt coatings. Identical performance properties can be achieved using raw materials, resulting in concentrations of bio-based carbon above 30 %. Note de contenu : - Prior research
- Crosslinking mechanisms
- Covalent and ionic crosslinking
- Experimental
- Test methods
- Best compromise
- Table 1 : different experimental acrylic dispersions
- Table 2 : Pigment paste and matt white topcoat composition
- Table 3 : Comparison between second generation R2 dispersions with completely fossil or partiall renewable monomersEn ligne : https://drive.google.com/file/d/16CIXJzVEX8NDYhjgpKriIXpPqBwxDFnV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38530
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 12 (12/2022) . - p. 38-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23759 - Périodique Bibliothèque principale Documentaires Disponible 23767 - Périodique Bibliothèque principale Documentaires Disponible Modified acrylic core-shell / Alann de Oliveira Piagentini Bragatto in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4619 (04/2016)
[article]
Titre : Modified acrylic core-shell Type de document : texte imprimé Auteurs : Alann de Oliveira Piagentini Bragatto, Auteur ; Jorge Mayer de Oliveira, Auteur Année de publication : 2016 Article en page(s) : p. 22-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Brillance (optique)
Core-Shell
Dispersions et suspensions
Essais accélérés (technologie)
Etudes comparatives
Hydrophobie
Polyacryliques
Vernis -- Propriétés mécaniques
Vernis en phase aqueuse
vernis en phase solvantIndex. décimale : 667.9 Revêtements et enduits Résumé : Evaluation of performance of exterior wood vanishes formulated with core-shell polymer dispersions, as an alternative to replacing solvent-based high performance coatings. En ligne : https://drive.google.com/file/d/1janAFh6XNIp5aLTM6MOf4TzNxu1ZRwr1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26125
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4619 (04/2016) . - p. 22-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17963 - Périodique Bibliothèque principale Documentaires Disponible Nail polish : a water-based alternative / Kora Brandenburg in SOFW JOURNAL, Vol. 142, N° 12 (12/2016)
PermalinkNew applications for CAB / K. R. Walker in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4452 (05/2002)
PermalinkNovel light stabilizers for environmental friendly coatings / Yung-Chi Yang in PAINTINDIA, Vol. LXIV, N° 5 (05/2014)
PermalinkOrganic vs inorganic light stabilizers for waterborne clear coats : a fair comparison / Christian Schaller in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 4 (07/2012)
PermalinkPeintures, vernis et liants. Détermination de la valeur MEQ des produits de peinture et liants à base d'eau - Norme ISO 15880 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2013)
PermalinkPolyamides show performance gains / Nina Musche in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2017)
PermalinkPreparation and characterization of waterborne polyurethane nail enamel modified by silane coupling agent in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
PermalinkPermalinkPermalinkPermalinkSurface coating performance of TiO2 nanoparticle-modified veneered panels and their influence on formaldehyde emission / Xiao Dong Zhu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
PermalinkSynthèse de latex de copolymères styrène/acrylique adaptés au développement d'un vernis à ongles aqueux / José-Luis Gaspar / 2000
PermalinkThe effects of tannins on adhesion strength and surface roughness of varnished wood after accelerated weathering / Mesut Yalcin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
PermalinkPermalinkVarnish layer hardness of Oriental beech (Fagus orientalist L.) wood as affected by impregnation and bleaching / Musa Atar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 3 (07/2004)
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