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Two component waterborne polyurethane topcoat for bridges / Mangesh Sidam in PAINTINDIA, Vol. LXXI, N° 11 (11/2021)
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Titre : Two component waterborne polyurethane topcoat for bridges Type de document : texte imprimé Auteurs : Mangesh Sidam, Auteur ; Shweta Gupta, Auteur Année de publication : 2021 Article en page(s) : p. 66-72 Langues : Anglais (eng) Catégories : Durée de vie en pot
Polyisocyanates hydrophiles
Polyuréthanes
Revêtements -- Finition
Revêtements bi-composant
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : This article introduces the basic principles of two-component waterborne polyurethane coatings and its applications for walls, floors and in infrastructures. It also presents the results based on intensive lab evaluations with different combinations of polyol dispersions and hydrophilic polyisocyanates for performance adjustment in order to meet different performance and cost requirements as well as based on real time success cases. Two component waterborne PU based topcoat can be used both on wall as well as on floor coating in various applications such as hospitals, schools & kindergartens, electronic plants, food processing workshops, kitchens, warehouses, car parking, bridges etc. due to its excellent performance such as abrasion resistance, easy-to-clean, stain and scratch resistance and weathering resistance. Note de contenu : - Basic reactions
- Hydrophilic polyisocyanates
- NCO/OH ratio
- NOC reacting with water
- Pot life
- Tough but flexible
- Stain resistance/dirt pick up resistance
- Fungus/algae resistance
- Tire staining
- Real life cases : Bhumiphol bridge, ThailandEn ligne : https://drive.google.com/file/d/1Cjh71G8Tc35_xOFlkWRRaN4L7RYFDE-w/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37107
in PAINTINDIA > Vol. LXXI, N° 11 (11/2021) . - p. 66-72[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23261 - Périodique Bibliothèque principale Documentaires Disponible Two component waterborne polyurethanes for construction coatings / Prashant Gangwar in PAINTINDIA, Vol. LXIII, N° 4 (04/2013)
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Titre : Two component waterborne polyurethanes for construction coatings Type de document : texte imprimé Auteurs : Prashant Gangwar, Auteur Année de publication : 2013 Article en page(s) : p. 118-122 Langues : Anglais (eng) Catégories : Formulation (Génie chimique)
Hydrophilie
Polyisocyanates
Polyols
Polyuréthanes
Résistance à l'abrasion
Résistance à la salissure
Résistance aux taches
Résistance chimique
Revêtements anti-graffitis
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuse
Salissures biologiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In India, construction is the second largest economic activity alter agriculture. Construction accounts for nearly 65 per cent of the total investment in infrastructure and is expected to be the biggest beneficiary of the surge in infrastructure investment over the next five years. Investment in construction accounts for nearly 11 per cent of India's Gross Domestic Product (GDP). As opportunities in the sector continue to come to the fore, foreign direct investment has been moving upwards.
This article covers basic principles of two-component waterborne polyurethane coatings and its applications for both walls and floors in construction areas. It also presents the results based on intensive lab evaluations with different combinations of polyol dispersions and hydrophilic polyisocyanates for performance adjustment in order to meet different performance and cost requirements. The coatings can be easy-to-clean, anti-graffiti for the use of exterior/interior walls, interior walls for hospitals, schools & kindergartens, electronic plants, food processing workshops, kitchens, metro stations etc. It can also be used as topcoat of floor coatings for commercial and industrial areas with excellent abrasion resistance, scratch resistance & chemical resistance. The real life cases will be analyzed in this article as well.Note de contenu : - APPLICATIONS
- BASIC REACTIONS
- HYDROPHILIC POLYISOCYANATES
- SELECTION OF POLYOL DISPERSIONS
- TYPICAL FORMULATIONS AND DISCUSSION : NCO/OH ratio - NCO reacting with water - Pot life - Tough but flexible - Stain resistance/dirt pick up resistance - Fungus/algae resistance
- REAL LIFE CASES : Floor of bubble bar - Floor of Bayer PCS (Makrocolor, G. Noida, India) - Replacement of blackboard with 2K WB PU in a school in India - Interior wall of bathroom - OthersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18858
in PAINTINDIA > Vol. LXIII, N° 4 (04/2013) . - p. 118-122[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15214 - Périodique Bibliothèque principale Documentaires Disponible Two-component waterborne polyurethanes : The rheology of mixing / H. Bui in EUROPEAN COATINGS JOURNAL (ECJ), N° 5/97 (05/1997)
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Titre : Two-component waterborne polyurethanes : The rheology of mixing Type de document : texte imprimé Auteurs : H. Bui, Auteur ; M. Dvorchak, Auteur ; K. Hudson, Auteur ; J. Hunter, Auteur Année de publication : 1997 Article en page(s) : p. 476-481 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements
Composés organiques volatils
Formulation (Génie chimique)
Mélanges (chimie)
Polyisocyanates
Polyols
Polyuréthanes
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuse
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Two-component waterborne polyurethane systems for wood can be formulated with ultralow Volatile Organic Compounds (VOC) and Volatile Hazardous Air Pollutants (VHAPs). Due to the high surface tension of these systems, and the high viscosity of polyisocyanates relative to the polyol dispersion, problems still remain with mixing in industrial applications. The high viscosity causes gel formation in the in-line mixing apparatus, and the high surface tension and air entrapment cause microfoam in the final film. Therefore, the rheology of dynamic and static mixing of the system was studied in detail. The results show that the critical parameters for controlling the properties of the coatings are 1) viscosity of polyisocyanates and 2) particle size of the mixture of polyol and polyisocyanate under both low and high shear flow fields. With this knowledge, the spray equipment and formulation were modified for wood applications to give better spraying with no gel formation and reduced microfoam. Note de contenu : - Chemistry of two-component waterborne polyurethanes
- Problems with two-component waterborne polyurethane coatings
- Materials
- Experimental
- Formulation for wood coatings applications
- Morphology of polyisocyanate and polyol latex in water
- Batch mixing
- Dynamic Mixing
- Modification of spray equipment
- Comparisons of mixing methodsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11403
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5/97 (05/1997) . - p. 476-481[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002527 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Tying up the knots : Waterborne cationic emulsion resists bleed discolouration from wood Type de document : texte imprimé Auteurs : Jurgen Scheerder, Auteur ; Jan Bouman, Auteur ; Marc Roelands, Auteur ; Derrick R. Twene, Auteur Année de publication : 2011 Article en page(s) : p. 42-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Formulation (Génie chimique)
Oligomères
Polymères cationiques
Primaire (revêtement)
Résistance aux taches
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : A waterborne cationic emulsion polymer was shown to give a very high level of anti-knot bleeding performance. It also offers universal adhesion characteristics to a wide range of substrates. The charge density and chemical composition distribution of the cationic oligomers are shown to be key factors in respect of these important properties. Note de contenu : Use and limitation of knot sealers
- Formulation and test procedures summarised
- Differences between the cationic polymer dispersions
- Cationic products show advantages in adhesion tests
- Adhesion mechanisms and chemical interactions
- Chemical composition distributionEn ligne : https://drive.google.com/file/d/146SP0IZDa-LDq7C48n4amcmSvLmRwWxH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11898
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2011) . - p. 42-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13269 - Périodique Bibliothèque principale Documentaires Disponible Ultra violet treatment process for leather finishing / Tilo Schumacher in WORLD LEATHER, Vol. 15, N° 1 (02-03/2002)
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Titre : Ultra violet treatment process for leather finishing Type de document : texte imprimé Auteurs : Tilo Schumacher, Auteur Année de publication : 2002 Article en page(s) : p. 53 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Photoamorceurs (chimie)
Photoréticulation
Polyuréthanes
Rayonnement ultraviolet
Revêtements en phase aqueuseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A new technique has been developed as part of leather finishing which uses ultra violet (UV) treatment to improve both the physical and aesthetic properties of the finish film. The treatment utilises a completely different reaction process than any present day technique for cross linking or fixation.
The water-based finishes can be applied conventionally, and the finishing operation is finalised by a brief fixation of between 0.4-0.6 seconds provided by a UV-mercury lamp at 90W/cm. The exposure/reaction time is controlled by adjusting the conveyor speed through the UV-polymerisation unit.
This treatment does not change the gloss/matt effect of the finish in the manner of a top spray coat, and it is possible to use fewer finish applications. The treatment is so effective that, after the UV exposure, no more finish coats can be applied, and the leather cannot be refinished.Note de contenu : - Fig. 1 : Schematic showing the reactive PU and the photo-initiator in the finish film
- Fig. 2 : UV exposure splits the photo-initiator forming two radicals to react with the C=C bonds of the PU
- Fig. 3 : Inter-reactions between the molecules causes the formation of PU chains of varying lengths
- Fig. 4 : UV-polymerisation unit and conveyorEn ligne : https://drive.google.com/file/d/1MhLQipzpV-Fd66F2twaL34DDcJ3iRi69/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32198
in WORLD LEATHER > Vol. 15, N° 1 (02-03/2002) . - p. 53[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006176 - Périodique Bibliothèque principale Documentaires Disponible Unifying model for understanding HEUR associative thickener influences on waterborne coatings : I. HEUR interactions with a small particle latex / Mao Chen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
PermalinkUniversal defoamer to reduce complexity / Chris Howard in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4568 (01/2012)
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PermalinkPermalinkUse of novel polyetheralkanolamine comb polymers as pigment dispersants for aqueous coating systems / Nguyên-Dang-Tâm in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 3 (09/2007)
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PermalinkUsing DC electrochemical techniques to assess the relative corrosiveness of water-based coatings and their ingredients / F. Louis Floyd in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)
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PermalinkUsing "high performance two-component waterborne polyurethane" wood coatings / Michael J. Dvorchak in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 866 (03/1997)
PermalinkUV-cured coatings based on waterborne resins ans Si02 nanoparticles / Anna di Gianni in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 2 (06/2009)
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PermalinkVAE copolymer emulsions in latex paints / Artur Palasz in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2022)
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PermalinkVanillin as low-temperature isocyanate-blocking agent and its use in one-component aqueous coatings / Philipp Knospe in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
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PermalinkVariables influencing microflocculation in coalesced emulsion in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 916 (05/2001)
PermalinkVeoVa/(meth)acrylate latices : high quality binders for water-borne anti-corrosion primers / M. M. C. P. Slinckx in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 2 (02/1995)
PermalinkVeoVa vinyl ester based lattices with high binding power for interior matt paints / Delphine Uwukunda in PAINTINDIA, Vol. LXII, N° 2 (02/2012)
PermalinkVers un système bicomposant complet in GALVANO ORGANO, N° 809 (03/2012)
PermalinkVersatile self-crosslinking polyurethane dispersion for low VOC coatings across multiple markets / Aditi Chavannavar in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4645 (10/2018)
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PermalinkVersatile self-crosslinking polyurethane dispersion for low VOC coatings across multiple markets / Aditi Chavannavar in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4646 (11/2018)
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