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Green materials - the future of coatings / Pradeep S. Verma in PAINTINDIA, Vol. LIXV, N° 12 (12/2014)
[article]
Titre : Green materials - the future of coatings Type de document : texte imprimé Auteurs : Pradeep S. Verma, Auteur ; Sandeep V. Gopalkar, Auteur Année de publication : 2014 Article en page(s) : p. 53-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Biopolymères
Chimie écologique
Cires
Composés organiques volatils
Esters
Huile de soja
LignineLa lignine est un des principaux composants du bois, avec la cellulose, l'hémicellulose et des matières extractibles. La lignine est présente principalement dans les plantes vasculaires et dans quelques algues. Ses principales fonctions sont d'apporter de la rigidité, une imperméabilité à l'eau et une grande résistance à la décomposition. Toutes les plantes vasculaires, ligneuses et herbacées, fabriquent de la lignine. Quantitativement, la teneur en lignine est de 3 à 5 % dans les feuilles, 5 à 20 % dans les tiges herbacées, 15 à 35 % dans les tiges ligneuses. Elle est moindre pour les plantes annuelles que pour les vivaces, elle est maximum chez les arbres. La lignine est principalement localisée entre les cellules (voir parois pectocellulosiques), mais on en trouve une quantité significative à l'intérieur même de celles-ci. Bien que la lignine soit un réseau tridimensionnel hydrophobe complexe, l'unité de base se résume essentiellement à une unité de phénylpropane. La lignine est le deuxième biopolymère renouvelable le plus abondant sur la Terre, après la cellulose, et, à elles deux, elles cumulent plus de 70 % de la biomasse totale. C'est pourquoi elle fait l'objet de recherches en vue de valorisations autres que ses utilisations actuelles en bois d'œuvre et en combustible.
Voie de biosynthèse : La lignine est une molécule dont le précurseur est la phénylalanine. Cet acide aminé va subir une cascade de réactions faisant intervenir une dizaine de familles d'enzymes différentes afin de former des monolignols. Ces enzymes sont : phénylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate:CoA ligase (4CL), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), caffeoyl-CoA o-methyltransferase (CCoAOMT), cinnamoyl-CoA reductase (CCR), ferrulate 5-hydroxylase (F5H), caffeic acid O-methyltransferase (COMT) et cinnamyl alcohol deshydrogenase (CAD). Dans un certain nombre de cas, des aldéhydes peuvent également être incorporés dans le polymère.
Lipides
Pigments
Polluants atmosphériques
Polyacryliques
Polymères en émulsion
Solvants écologiques
SucreIndex. décimale : 667.9 Revêtements et enduits Résumé : There is growing concern of impact of harmful chemicals on the environment and human health. Efforts are being made to use environmental friendly processes and chemicals. This has led to exploration of green materials in various industries including paints and coating industry. This review focuses on the materials which can be used in coatings to reduce the environmental impact of chemicals by using natural products, soybean oil based polymers, green solvents, green anticorrosive and green colouring pigments, lignins in wood coating, green prepolymers as sealant and adhesives, agricultural materials, nanotechnology, wax ester. Finally using bio sourced solvents in paints we make the coating greener. Note de contenu : - Green solvents
- Use of natural products in coating applications
- Coatings derived from novel, soybean oil based polymers, produced using carbocationic polymerization
- Use of polymer dispersion technique in green coating
- Green anticorrosive pigments
- Ultramarine blue pigment
- Use of lignins in wood coating
- Use of nanotechnology to make coatings green
- Green pre-polymer used as a sealant & adhesive
- Use of acrylic emulsion using renewable content
- Use of biosourced solvent in paints
- A green option with agricultural material to develop paint
- Soybean oil based wetting and dispersing agents
- Wax-esters produced by solvent free energy efficient enzymatic synthesis & their applicability as coatingsEn ligne : https://drive.google.com/file/d/14cZJopmyKMWD6zqA1vY5SUUQUW-9oZE7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23483
in PAINTINDIA > Vol. LIXV, N° 12 (12/2014) . - p. 53-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17054 - Périodique Bibliothèque principale Documentaires Disponible Green technology for the construction industry - two component waterborne polyurethane coatings / Prashant Gangwar in PAINTINDIA, Vol. LXI, N° 8 (08/2011)
[article]
Titre : Green technology for the construction industry - two component waterborne polyurethane coatings Type de document : texte imprimé Auteurs : Prashant Gangwar, Auteur Année de publication : 2011 Article en page(s) : p. 91-96 Langues : Anglais (eng) Catégories : Chimie écologique
Formulation (Génie chimique)
Hydrophilie
Polyisocyanates
Polymères en émulsion
Polyols
Polyuréthanes
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The world is changing. Green technology has become an imperative of corporate responsibility and a milestone on the road to future sustainability. An increasing number of market players share this view, and analysts, investors and the general public expect to see assertive action from the industry. Due to pressure from the public and the media, green technology has escalated very quickly into a megatrend in the global marketplace. What began as an "eco-trend" has entered the mainstream in response to consumer demand. The market for green products is ramping up rapidly and relentlessly. Bayer MaterialScience recognized this trend early on, and it has positioned itsel at the forefront of the new movement.
Waterborne polyurethane coatings have started to repeat the success story of Bayer's well known Desmodur and Desmophen coatings raw materials. Within the construction industry, applications for both walls and floors have perfectly proven the fact that the performance of the green generation products is fulfilling all the requirements. A toolbox of polyol dispersions and requirements. The coatings can be easy-to-clean or anti-graffiti, for application on exterior/interior walls, interior walls for hospitals, schools & kindergartens, electronic plants, food processing workshops, kitchens, metro stations, etc. They can also bu used as the topcoat of floor coatings for commercial and industrial areas with excellent abrasion resistance, scratch resistance & chemical resistance. Real life cases will be analysed in this article as well.Note de contenu : - BASIC MECHANISM
- HYDROPHILIC POLYISOCYANATES
- TYPICAL FORMULATIONS AND DISCUSSION : NCO/OH ration - NCO reacting with water - Discussion pot life - Tough tub flexible - Stain resistance/dirt pick up resistance - Discussion : Fungus/algae resistance
- REAL LIFE CASES : Floor of bubble bar - Floor of bayer (Makrocolor) - Replacement of blackboard with 2K WB PU in a school in India - Exterior walls of Bayer Jinling polyurethane plant - Interior walls of bathroom - Others.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11875
in PAINTINDIA > Vol. LXI, N° 8 (08/2011) . - p. 91-96[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13282 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Greener decorative paints : Design the phases carefully for better results than fossil-fuel based binders Type de document : texte imprimé Auteurs : Willem-Jan Soer, Auteur ; Maud Kastelijn, Auteur ; Tijs Nabuurs, Auteur Année de publication : 2021 Article en page(s) : p. 40-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages.
Biomatériaux
Chimie écologique
Copolymères
Enrobage (technologie)
Formulation (Génie chimique)
Liants en phase aqueuse
Polymères en émulsion
Revêtements décoratifs:Peinture décorativeIndex. décimale : 667.9 Revêtements et enduits Résumé : A growing need for more sustainable coatings leads to the exploration and use of new bio-based raw materials. Biorenewable raw materials have been widely used in coatings for a very long time, for instance in natural oil-based or alkyd coatings. In these, fatty acids, such as those derived from linseed oil, are polymerised by reacting polyols with polyacids via polycondensation. In the past alkyd resins were solvent-based : in recent years water-borne alternatives have been developed.
Although the gloss and appearance of this type of resins is excellent, water-borne alkyd resins do come with some shortcomings, such as dark yellowing and a relatively slow drying process compared to, for instance, polyacrylate- or polyurethane-based coatings.Note de contenu : - Measuring biological origin
- Changing technologies
- Our system
- The problem
- The solution
- Table 1 : Bio-based monomers used in multiphase copolymer emulsions, where in all experiments bath phases contain 5 % of acrylic acid (AA)
- Table 2 & 3 : Coating properties of bio-based copolymer emulsions described in Table 3, in a clear formulation
- Table 4 : Coating properties oF bio-based copolymer emulsions containing 5 % acrylic acid in the high Tg phase and 1 % of acrylic acid [EM7) and 5 % of acrylic acid (EMLI) in the low Tg phaseEn ligne : https://drive.google.com/file/d/1I9vQ0Wu07og1eQcNKsqD53-5ALs0Xj0s/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35863
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2021) . - p. 40-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22750 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : A greener shade of white : Acrylic emulsion system targets high durability with renewable content Type de document : texte imprimé Auteurs : David Graham, Auteur ; Anca Puiu, Auteur ; Catarina Ralheta, Auteur ; Susana Carvalho, Auteur Année de publication : 2011 Article en page(s) : p. 36-40 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie écologique
Emulsifiants
Epaississants
Formulation (Génie chimique)
Polyacryliques
Polymères en émulsion
Ressources renouvelables
Revêtements en phase aqueuse:Peinture en phase aqueuse
SurfactantsIndex. décimale : 667.9 Revêtements et enduits Résumé : A coating with reduced environmental impact has been developed, using a pure acrylic polymer to maximise durability. Emulsions were produced at high solids content (to reduce production, transport and packaging impacts) with very low levels of a renewable-based emulsifier and thickener. Application and performance properties were good. Note de contenu : - Choosing a route to environmental efficiency
- Raw material selection for emulsion
- Application tests on paint formulations
- Issues relating to surfactant choice
- In pursuit of environmental excellenceEn ligne : https://drive.google.com/file/d/1DX7NpGYPhO_CLa8s_35tl66svHTn_8G4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11897
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2011) . - p. 36-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13269 - Périodique Bibliothèque principale Documentaires Disponible Heat resistant, ultra-smooth UV curable alkyd primers for PVD / Akio Umino in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4636 (11/2017)
[article]
Titre : Heat resistant, ultra-smooth UV curable alkyd primers for PVD Type de document : texte imprimé Auteurs : Akio Umino, Auteur ; Hirotake Fukuoka, Auteur ; Ichiro Azuma, Auteur Année de publication : 2017 Article en page(s) : p. 15-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dépôt en phase vapeur
Essais d'adhésion
Formulation (Génie chimique)
Polyalkydes
Polymères en émulsion
Primaire (revêtement)
Résistance thermique
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The authors discusses the latest UV curable, water-based alkyd resin, which offers excellent adhesion to various substrates.
The authors of this paper have developed a novel alkyd resin and completed a primer paint that can be used for all substrates. This alkyd resin has benn adopted by the world's leading headlamp manufacturer, realising the reduction of environmental burden due to painting loss and a reduction of working cost ; demand continues to increase year over year.
This paper explores the design of the novel alkyd resin which realises excellent heat resistance to form a crosslinked structure with an acrylate compound via UV irradiation and also exhibits excellent surface smoothness. Furthermore, the development of waterborne alkyd resins suitable for this application will be discussed.Note de contenu : - UV CURE CONCEPT OF ALKYD RESINS
- ALKYD RESIN SYNTHESIS AND PAINT FORMULATION : Spray, curing, and PVD condition - Appearance and cross-hatched adhesion test results in a PPS substrate - Heat resistance evaluation - IR spectra before and after UV-irradiation - Observation of surface shape - Cross-hatched adhesion test for various substrates - Characteristic of alkyd by each thermomechanical analyser (TMA) and thermogravimetry differential thermal analysis (TGA-DTA)
- DESIGN OF UV CURABLE WATER-BASED ALKYD RESIN DISPERSION : Synthesis of water-based alkyd resin - Paint formulation - Spray, curing, and PVD condition - Appearance and cross-hatched adhesion test results for various substrates
- FIGURES : 1. Expression of mirror surface design by primer of PVD - 2. Substrate of headlamp and its requirement of heat resistance - 3. Crosslinking of alkyd resin and acrylate compound by UV irradiation - 4.Appearance result after heat resistance test at 230°C - 5. Infrared absorption spectrum of prototype 3 before and after UV irradiation - 6. Surface observation results of the Prismatic pattern in prototype 5 - 7. Comparison of alkyd with acrylic by thermal equipment analysis - 8. Image of UV curable waterborne polymers - 9. Synthetic summary of the water-based alkyd resin
TABLES : 1. Synthesised alkyd resin - 2. Composition of UV curable coating for PVD primer - 3. Formulation of test paint - 4. Results of heat resistance test of prototype 1 to 6 on a PPS substrate - 5. Results of cross-hatched adhesion test on various substrates on initial and after heat resistance test - 6. Technical data of UV curable water-based paints - 7. Formulation of test paint - 8. COmparison of application test results between water-base and solvantEn ligne : https://drive.google.com/file/d/13nmsbWiqaCWskoEhEk0yLFUY7G1fjTAg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29464
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4636 (11/2017) . - p. 15-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19390 - Périodique Bibliothèque principale Documentaires Disponible High molecular weight silicone emulsions as surface lubricating additives / Ogul Arseven in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4595 (04/2014)
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