Aqueous bio-polymer dispersion for coating industry / Vivek L. Patil in PAINTINDIA, Vol. LXVI, N° 2 (02/2016)  

[article]  inPAINTINDIA > Vol. LXVI, N° 2 (02/2016) . - p. 67-75 Titre : Aqueous bio-polymer dispersion for coating industry Type de document : texte imprimé Auteurs : Vivek L. Patil, Auteur ; Pandit Devchandra, Auteur Année de publication : 2016 Article en page(s) : p. 67-75 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères Développement durable Dispersions et suspensions Ressources renouvelables Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Coating industry significantly contributes to the carbon footprint and VOC (Volatile organic compound) considering high volumes of coatings are still solvent borne. Recent technological trends of the coating industry are showing sustainability as the key approach to achieve reduced carbon footprint and low VOC. This is also driven by various eco-friendly & green initiatives across the globe. This article emphasises the use of water as replacement for organic solvents during the manufacture and application of coatings. Of late many water based technologies have emerged as against solvent based system in the coating industry. Here resin / paint need to be designed in such a way to achieve dilution with water during manufacture and application in order to minimize any hazard, odour and VOC during the entire chain of paint processing and its use. Since polymers are most vital ingredient responsible for the performance of a coating system, it becomes imperative to make them water thinnable in place of organic solvent while ensuring acceptable performance as expected from them. Therefore, in this article, different formulation techniques and principles have been reviewed for water based polymer synthesis. Polymers can be sustainable if synthesised from bio-derived raw materials. Various binders used in the coating industry and their respective bio based raw materials have also been covered in this review as use of bio derived polymers and water as carrier opens doors for sustainable growth in the coating industry. Note de contenu : - WHAT ARE BIO-POLYMERS ? : Bio-polymer verses synthetic polymers - BIOPOLYMERS AND THEIR DERIVATIVES - FEW INDUSTRIAL BACKBONE RESINS AND THEIR BIOLOGICAL GENERICS ARE : Epoxy resins derived from bio-based building blocks - A. Bio derived epichlorohydrin - B. Other bio derived building block - C. Bio-based epoxy curing agent - Bio derived acrylic monomers - FACTS ABOUT POLYMER DISPERSIONS : Techniques for biopolymer dispersions - Volatile organic solvent-based techniques - A. Emulsification diffusion technique - B. Precipitation technique - C. Salting out technique - D. Emulsification-diffusion - Thermo-mechanical techniques - Correlation of appearance and particle size - Film formation of dispersion binder - Stabilization of dispersions - Primary dispersion - Emulsion of liquid polymers - Secondary dispersions - Secondary polymer dispersion commercially available - Epoxy dispersions - Alkyd/polyester dispersions - Acrylic dispersion - Polyurethane dispersions En ligne : https://drive.google.com/file/d/1N__c16u8gprf8jXSSNGqbczyLPCfAzK7/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25667 [article]

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Synthesis strategies and advantages of waterborne polyurethane dispersions (PUDs) : a review / Subrata Hota in PAINTINDIA, Vol. LXXI, N° 9 (09/2021)  

[article]  inPAINTINDIA > Vol. LXXI, N° 9 (09/2021) . - p. 55-63 Titre : Synthesis strategies and advantages of waterborne polyurethane dispersions (PUDs) : a review Type de document : texte imprimé Auteurs : Subrata Hota, Auteur ; Jomin Thomas, Auteur ; Pandit Devchandra, Auteur Année de publication : 2021 Article en page(s) : p. 55-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Haut extrait sec Ionomères Un ionomère est un copolymère thermoplastique « réticulé ioniquement ». La réticulation améliore la cohésion du polymère et la conductivité électrique. Polyéthylène téréphtalate Polymères -- Recyclage Polyuréthanes Ressources renouvelables Revêtements en phase aqueuse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : With the implementation of stringent environmental regulations for the reduction of Volatile Organic Compound (VOC) all across the globe, the need for waterborne paint system have never been so vital. Diverging from a common belief that water borne coatings are inferior to that of solvent borne in terms of various properties, the current era has started to witness the emergence of water borne Polyurethane Dispersions (PUDs). A fully fledged study is carried out in regard to PUDs, its various types like non-ionic, anionic and cationic, relevance of Segmentai variances like hard and soft segments, acrylic modifications and also sustainable modifications using oil, fatty acids and polyethylene terephthalate (PET) wastes. The study is not circumscribed by just traditional synthesis routes but also discusses in detail the current and even the bright future of polyurethane dispersions. PUDs are the areas with immense research scope and new technologies and methods are sure to be innovated, nevertheless, it carries in itself assured repercussions into the near future of the paint and coating industry. Note de contenu : - Types of PUDs : Cationic PUDs - Anionic PUDs - Concept of soft segment and hard segment of PUDs - Acrylic modifications of polyurethane dispersions/emulsions - Sustainable modifications of polyurethane dispersions - PUDs from oil and fatty acids - PUDs from industrial wastes - Latest innovations in PUDs synthesis En ligne : https://drive.google.com/file/d/1Z9O2yddwOOdlU932OwL2__U6J_AXHoXA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36562 [article]

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