Overcoming technical challenges in emulsion polymer (dirt pickup resistance) / Suraj Ashok Sawant in PAINTINDIA, Vol. LXXI, N° 12 (12/2021)  

[article]  inPAINTINDIA > Vol. LXXI, N° 12 (12/2021) . - p. 55-58 Titre : Overcoming technical challenges in emulsion polymer (dirt pickup resistance) Type de document : texte imprimé Auteurs : Suraj Ashok Sawant, Auteur ; Prashant Waykole, Auteur Année de publication : 2021 Article en page(s) : p. 55-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Latex Polyuréthanes Résistance à la salissure Revêtements en bâtiment:Peinture en bâtiment Revêtements en phase aqueuse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Improving dirt pickup resistance especially in waterborne coatings is critical to future coating innovations. This review article focuses on the development of a coatings with improved dirt pickup resistance, with seems to be continues important goal in the coatings industry. The basic demand for this is due to the growth in "softer" elastomeric wall and roof coatings which demands low-VOC formulations and with traditional emulsions it results in tackier coatings due to reduced glass transition temperatures (Tgs). If we consider the current scenario of Asian continent, there are a huge number of high-rise commercial buildings constructions are planned, which is driving the need for coatings that are easier to clean and maintain. Different processes of emulsion preparation such as post (room temperature) crosslinking and inorganic organic hybrid emulsion, which facilitate the cleaning of coating by water are been discussed. It also draws a brief idea on the possible applications of the same with different paint formulations. This paper explains the terminology Dirt Pickup Resistance, laboratory test method to measure the same, newer challenges for Paint industry regarding DPUR & how the DPUR fora paint can be improved. Note de contenu : - Mechanism of dirt pickup on latex paint films - Measures to improve dirt pickup - Method for measuring dirt pick up resistance - Different approaches to improve dirt pickup resistance in paint : Other historic methods for DPUR improvement - Experimental evidences of core/shell polymeric latex and the results against regular emulsion binder En ligne : https://drive.google.com/file/d/1eiFSV-RipUGCV6MhiCbr1u1H2Uu0Ustf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37114 [article]

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Technical review on hydrophobically modified alkali swellable (HASE) emulsion / Prashant Waykole in PAINTINDIA, Vol. LXXIII, N° 1 (01/2023)  

[article]  inPAINTINDIA > Vol. LXXIII, N° 1 (01/2023) . - p. 53-58 Titre : Technical review on hydrophobically modified alkali swellable (HASE) emulsion Type de document : texte imprimé Auteurs : Prashant Waykole, Auteur ; Suraj Sawant, Auteur Année de publication : 2023 Article en page(s) : p. 53-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Emulsion alcali soluble modifiée de façon hydrophobe Epaississants Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : This article focuses on the definition, mechanism of action, synthesis, effect in the final paint formulation and market review of HASE Emulsion polymer. Hydrophobically modified alkali soluble polymer emulsions are important class of rheology modifiers for waterborne coatings. Hydrophobically modified water-soluble polymers, used by latex paint manufacturers as associative thickeners, provide significant advantages in improving film build and leveling, and decreasing spatter from roller-applied paints. Preparation method of HASE thickeners contains number of monomers ethyl acrylate, methyl methacrylate, associative macro monomer, crosslinking monomer etc. Rheological behaviour of thickener solution depends on number of factors like molecular weight of polymer chain, amount of crosslinking agent used in polymerisation, acid monomer quantity used, and concentration of associative macro monomer. Generally Redox polymerisation is preferable to achieve higher molecular weight polymer. Note de contenu : - Thickening mechanism - Mechanism of association of HASE polymers with hydrophobes - Shear rate regions - Hydrophobically modified alkali swellable emulsion (HASE) market information - Fig. 1 : Associatio of HASE polymers with hydrophobes - Fig. 2 : Crosslinked associative rheology modifier - Fig. 3 : The global hydrophobically modified alkali swellable emulsion market share by application (2016), (%) En ligne : https://drive.google.com/file/d/1pcVxgjH128k0yxwjBIrr0QjXMMkDZefT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39514 [article]

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