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Cost effective alkyds / Srishti Dixit in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4527 (08/2008)
[article]
Titre : Cost effective alkyds Type de document : texte imprimé Auteurs : Srishti Dixit, Auteur ; Pramod Kumar, Auteur ; R. P. Singh, Auteur Année de publication : 2008 Article en page(s) : p. 27-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides gras
Formulation (Génie chimique)
Huile de linL'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative.
Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom.
L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément.
Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum.
Huile de son de riz
Polyalkydes
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The authors discusses alkyds resins, which are one of the most common typess used for the formulation of organic coatings.
The popularity of alkyd resins as a binder for coatings is largely due to benefits such as economical balance an uncomplicated application and an outstanding appearance of the films.Note de contenu : - Table 1 : Physicochemical characteristics of linseed oil fatty acids (LOFAs) and rice bran oil fatty acids (RBOFAs)
- Table 2 : Formulation of RBOFA - LOFA alkyds having 60% fatty acids (by weight)
- Table 3 : Physicochemical properties of LOFA alkyd and RBOFA- LOFA alkyds
- Table 4 : Evaluation of LOFA alkyd and RBOFA - LOFA alkyds
- Table 5 : Chemical resistance of the films of the prepared alkyd resins
- Table 6 : Solvent resistance of the films of the prepared alkyd resinsEn ligne : https://drive.google.com/file/d/1AQd-g7FHvaO30mImPWE4wuGE3YJnlZkn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37516
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4527 (08/2008) . - p. 27-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010613 - Périodique Bibliothèque principale Documentaires Disponible A cost-effective alternative to 2K polyurethanes / Nathalie Havaux in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4668 (04/2021)
[article]
Titre : A cost-effective alternative to 2K polyurethanes Type de document : texte imprimé Auteurs : Nathalie Havaux, Auteur ; Christophe Steinbrecher, Auteur ; Denis Heymans, Auteur Année de publication : 2021 Article en page(s) : p. 15-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymérisation
Liants
Marines (peinture)
Polymères à silane modifié
Réticulation à l'humidité
Revêtement monocomposant
Revêtements bi-composant
Revêtements organiques
Vernis
VinylsilaneLe vinylsilane est un composé chimique de formule CH2=CHSiH3. Ce dérivé organique du silane se présente sous la forme d'un gaz incolore dont l'intérêt est essentiellement théorique2. Ce sont surtout ses dérivés substitués sur l'atome de silicium qui sont utilisés. Les vinylsilanes sont notamment des intermédiaires utiles en synthèse organique3. En chimie des polymères et en science des matériaux, le vinyltriméthoxysilane CH2=CHSi(OCH3)3 et le vinyltriéthoxysilane (en) CH2=CHSi(OCH2CH3)3 sont utilisés comme monomères et agents de couplage.
Les vinylsilanes sont souvent préparés par hydrosilylation d'alcynes. Ils peuvent être obtenus en faisant réagir des alcényl-lithium tels que le vinyllithium et des réactifs de Grignard avec des chlorosilanes. La silylation-déshydrogénation est une autre méthode de production des vinylsilanes.Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic- and epoxy-alkoxysiloxanes are increasingly used in moisture-curing isocyanate-free resins for marine and protective applications. These resins are valuable alternatives to 2K polyurethanes due to their broad range of performances and their benefit to cope with recent environmental trends. Their market penetration, however, has been limited so far due to an unfavourable cost/ performance ratio.
A new family of polymers based on the combination of vinyl (neo)ester and vinyl alkoxysilane monomers is presented in this paper. These polymers, with solid content between 70 to 100%, offer attractive properties by varying process parameters, monomers composition and alkoxysilane levels, as well as an attractive cost level. This new, highly versatile, binder technology was tested in 1- and 2K moisture-cure coatings with standard catalysts. The tests demonstrate that high solids content, fast drying development and long shelf life can be combined in a cost-efficient and isocyanate-free solution. The performances of these vinyl silane copolymers enable the development of a new range of valuable alternatives to 2K polyurethanes and acrylic-alkoxysiloxanes for many applications, especially in protective coatings.Note de contenu : - Moisture curing alkoxysilanes
- Neocarboxylic acid-based monomers
- Vinyl silanes
- Copolymerisation vinyl silanes and vinyl ester monomers
- Experimental
- Resin optimisation
- Benchmarking exercise
- Clearcoat performance
- Pigmented topcoat performance
- Table 1 : Resin variables evaluated
- Table 2 : Properties of the liquid resins used fo benchmarking purpose
- Table 3 : Properties of the vinyl silane and benchmark coatingsEn ligne : https://drive.google.com/file/d/1lPl1Zjv971Qz591NJERimIURHQctSNJu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36759
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4668 (04/2021) . - p. 15-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23121 - Périodique Bibliothèque principale Documentaires Disponible Coupled effect of water absorption and ion transport in hydrated latex anti-corrosion coatings / Yu Ren Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : Coupled effect of water absorption and ion transport in hydrated latex anti-corrosion coatings Type de document : texte imprimé Auteurs : Yu Ren Zhou, Auteur ; Surya Effendy, Auteur ; Juner Zhu, Auteur ; Michael T. Petr, Auteur ; Colin Cwalina, Auteur ; Martin Z. Bazant, Auteur ; Bilge Yildiz, Auteur ; Ju Li, Auteur ; Michael P. Short, Auteur Année de publication : 2023 Article en page(s) : p. 187-200 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Gonflement (physique)
Humidité -- Absorption:Eau -- Absorption
Latex
Revêtements en phase aqueuse
Revêtements organiques
Revêtements protecteurs
Transports d'ionsIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-based anti-corrosion coatings, which are environmentally-friendly replacements for organic solvent-based coatings, do not perform well enough for use in the most challenging corrosion environments. The high water absorption capacity of water-based latex films may reduce barrier performance by contributing to corrosive reactant/product transport. We seek to understand the coupled effects of water absorption and ion transport in hydrated latex films, and to propose mechanisms explaining these effects. Water absorption and ion transport in films immersed in deionized (DI) water were monitored by mass gain and electrical conductivity measurements, respectively. Despite very similar polymer compositions between films, large differences in water absorption and ion transport rates were observed and explained by percolating networks at latex particle boundaries which facilitate transport. A semi-continuum model with three-component diffusion and convection-like elastic relaxation supported the assumptions of the physical mechanisms governing water absorption and ion transport. The evidence of the coupled processes of water absorption and ion transport in hydrated latex films revealed in this study are useful for designing water-based coatings that provide high levels of corrosion resistance. Note de contenu : - METHODOLOGY : Paint composition - Water absorption - Leached ion transport - Cross-section scanning electron microscopy (SEM) - Structural and chemical characterization
- RESULTS AND DISCUSSION : SAXS and FTIR results - Water entry mechanism into latex films - Effect of water absorption on ion leaching -Semi-continuum model - Model fitting procedure - Model output and results - Comparison of model and experiment - Model validation
- Table 1 : List of boundary conditions at the plane of symmetry and at the film/water interface
- Table 2 : List of known and fitted parameter values for SF-NP and SF-TiO2
- Table 3 : Validation data set is obtained by mass balance, assuming sodium chloride mobile ions and di(propylene glycol) n-butyl ether coalescentDOI : https://doi.org/10.1007/s11998-022-00676-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00676-0.pdf?pdf=button Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38835
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 187-200[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23928 - Périodique Bibliothèque principale Documentaires Disponible A critical review of techniques and technology of tablet coating / Nana Satpute in PAINTINDIA, Vol. LXXII, N° 10 (10/2022)
[article]
Titre : A critical review of techniques and technology of tablet coating Type de document : texte imprimé Auteurs : Nana Satpute, Auteur ; Ganesh Zade, Auteur Année de publication : 2022 Article en page(s) : p. 70-77 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Comprimés
Enrobage (technologie)
Enrobage pharmaceutique
Evaluation
Fluidisation
Liants
Pigments
Plastifiants
Polymères
Revêtements organiques
solvantsIndex. décimale : 667.9 Revêtements et enduits Résumé : Pharmaceutical drug coatings are highly advantageous and considerable development has recently happened to enhance the quality of the tablet. Tablet coating is carried out for the purposes such as decoration and protection of tablets along with some functional properties. The coating is a homogeneous mixture of polymeric material ; a very thin layer is applied on a substrate of the drug by using various techniques. These coatings techniques are either manually operated or fully automated. The automatic process gives coating with more uniform film properties at a high production rate. The coating is the last unit operation in the manufacturing of drugs in the pharmaceutical industries. Tablet coating involves the use of various binders, colour forming agents (colorants), organic solvents and plasticizers to get the required characteristics. Coating a tablet is always a great challenge to coating a formulator as it involves various statutory requirements to qualify as well as technically it also performs well against various environmental changes. Coating plays a key role in the pharma industry to protect the drugs from different environmental challenges like changes in humidity, light, heat etc. Now a days in coating application industries various new coating techniques are available like spray and fluidised bed methods that are developed to overcome the limitations of old techniques. This review paper focuses on the various aspects of various raw materials, types of tablet coating, processes of tablet coatings, defects and remedies of tablet coatings etc. Note de contenu : - PURPOSE OF COATING THE TABLET
- TABLET COATING MECHANISM : Types of coatings - Sugar coating
- FILM COATING
- RESIN
- PIGMENTS : Requirements of good pigment
- PLASTICIZER
- SOLVENT : Requirements of good solvent - Advantages of film coating over sugar coatings - Tablet coating defects and remedies - Colour variation - Orange peel - Blooming - Twinning - BListering/pinholes - Cracking - Chipping
- EVALUATION OF TABLET COATING
- ASPECTS OF TABLE COATING CHARACTERISATION
- Fig. 1 : Electrostatic dry coating system
- Fig. 2 : Classification of pigments
- Fig. 3 : Film coating process flow diagramEn ligne : https://drive.google.com/file/d/10h7iu-swNzc7oRVBjKC-cWyRuyx732mn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38539
in PAINTINDIA > Vol. LXXII, N° 10 (10/2022) . - p. 70-77[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23748 - Périodique Bibliothèque principale Documentaires Disponible Cross-linked polymers for aqueous finishing. Binders cross-linked polyaziridine. Part 2 : Behaviour of acrylic binders in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 4 (07-08/2008)
[article]
Titre : Cross-linked polymers for aqueous finishing. Binders cross-linked polyaziridine. Part 2 : Behaviour of acrylic binders Type de document : texte imprimé Année de publication : 2008 Article en page(s) : p. 157-161 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Formulation (Génie chimique)
Liants en phase aqueuse
Polyacryliques
Polyaziridine
Résistance à l'abrasion
Réticulants en phase aqueuse
Revêtements organiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Due to the current stringent regulations regarding emissions into the environment, coating recipes commonly used in leather finishing comprise water-based products. However, in order to obtain the physical properties required for most leather goods, the use of reactive cross-linkers is needed.
The present study aims to look into the behaviour of acrylic binders cross-linked with polyaziridine: the amount of cross-linker used, the type of polymer employed, the type of tannage and retannage and the evolution of the reaction over time.
A comparison of results shows that the type of tannage and retannage, as well as the physical characteristics of the acrylic binder used are influential factors in the behaviour of acrylic binders cross-linked with polyaziridine.
Different amounts of polyaziridine are needed with regard to the type of tannage and retannage and to the physical characteristics of the acrylic binder used.Note de contenu : - Table 1 : Monomers most commonly employed to produce acrylic binders
- Table 2 : Physical characteristics of the acrylic binders
- Table 3 : Coating formulation
- Table 4 : Results of colour fastness to dry rubbing
- Table 5 : Results of colour fastness to wet rubbingEn ligne : https://drive.google.com/file/d/1gufiXdrRy3Nc5oX3nOQqyu49tee1kRdZ/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38964
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 4 (07-08/2008) . - p. 157-161[article]Cross-linked polymers for aqueous finishing. Binders crosslinked with polyaziridin. Part. 1 : Behaviour of polyurethane in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)
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