Effect of copolymer composition on flow properties and film-forming of functionalised latex binders / J. Snuparek in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B1 (03/2006) . - p. 15-22 Titre : Effect of copolymer composition on flow properties and film-forming of functionalised latex binders Type de document : texte imprimé Auteurs : J. Snuparek, Auteur ; O. Quadrat, Auteur Année de publication : 2006 Article en page(s) : p. 15-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère styrène acrylique Emulsion alcali soluble modifiée de façon hydrophobe Epaississants Formation de film Latex Liants Plastification Polyuréthane éthoxylé modifié de façon hydrophobe Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic and styrene/acrylic latex binders comprising functional monomers such as acrylic acid, methacrylic acid, methacrylamide, methyl methacrylate, and hydroxyethyl methacrylate in different concentration levels were synthesised. It was shown that the extent of particle swelling and the hydroplasticisation of the alkali-swellable particles was affected by the polarity of the ‘hard’ comonomer. The effect of dissociated carboxylic groups on the increase in latex viscosity and on the lowering of its minimum film-forming temperature was much more pronounced in the case of the methyl methacrylate comonomer. The thickening of the latices with hydrophobe-modified ethylene oxide urethane (HEUR) associative thickeners was considerably affected by the hydrophobicity of the particles. Thickening with hydrophically-modified alkali-soluble emulsion (HASE) thickeners depends predominantly on the excluded volume of swollen thickener particles. The influence of the hydrophobic styrene content was negligible. Note de contenu : - EXPERIMENTAL : Monomers - Thickeners - Standard polymerisation recipe - RESULTS AND DISCUSSION : Minimum film-forming temperature of functionalised latexes - Effect of polar functional groups on the latex viscosity - Table 1 : Characteristics of Röhm & Has thickeners - Table 2 : Appearence of different ethyl acrylate/styrene/acrylic acid copolymer latexes under alkaline conditions (25wt% solids) DOI : 10.1007/BF02699610 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699610.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5391 [article]

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Saving rheology modifiers / Angela Cackovich in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4476 (05/2004)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4476 (05/2004) . - p. 16-21 Titre : Saving rheology modifiers Type de document : texte imprimé Auteurs : Angela Cackovich, Auteur ; Isabelle Mussard, Auteur Année de publication : 2004 Article en page(s) : p. 16-21 Langues : Anglais (eng) Catégories : Emulsion alcali soluble modifiée de façon hydrophobe Epaississants Polyuréthane éthoxylé modifié de façon hydrophobe Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Rhéologie Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : New rheology modifiers can offer paint and coating formulators a host of cost savings, write the authors. Coatings formulations based on waterborne polymers usually rely on agents to adjust their rheology profile to optimise properties such as sedimentation, flow and levelling, sagging, spattering, etc. Achieving a combination of various properties in parallel represents a challenging task and all stages - handling of the liquid coating, coating application and final coating properties - need to be considered. Additionally the attention for formulation costs is gaining an increasing importance. Recent Rohm and Haas product developments in the area of associative rheology modifiers led to three new product generations, responding to these identified market needs. Note de contenu : - Thickening mechanisms - Conventional thickeners - HEUR rheology modifiers - HASE rheology modifiers - Associative rheology modifiers as an alternative to cellulosic thickeners - Key interactions of associative thickeners with the paint ingredients - Polymer particle size / composition - New rheology modifiers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27733 [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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Zeta potential and thickeners / M. Veeramani in PAINTINDIA, Vol. LXVII, N° 2 (02/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 2 (02/2017) . - p. 90-96 Titre : Zeta potential and thickeners Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2017 Article en page(s) : p. 90-96 Langues : Anglais (eng) Catégories : Bases (chimie) Colloides Dispersions et suspensions Emulsion alcali soluble modifiée de façon hydrophobe Epaississants Polyacryliques Polymères en émulsion Potentiel zeta Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : We will now discuss an important property of Emulsion Polymer ; known as Zeta Potential in the context of Emulsion property it is very important. Zeta potential is a scientific term for electro kinetic potential in colloidal dispersions. In the colloidal chemistry literature, it is usually denoted using the Greek letter zeta hence -potential. From a theoretical viewpoint, the zeta potential is the electric potential in the interfacial double layer (DL) at the location of the slipping plane relative to a point in the bulk fluid away from the interface. In other words, zeta potential is the potential difference between the dispersion medium and the stationary layer of fluid attached to the dispersed particle. Note de contenu : - Calculation of zeta potential : Early pioneering work in that direction dates back to overbeek and booth - Acrylic thickeners - The role of rheology modifiers : Two extremes of theological behaviour are : Elastic behaviour - Viscous (or plastic) - Alkali- swellable thickeners (ASE-thickeners) - Liquid dispersion polymers (LDPs) - Hydrophobically modified alkali-swellable emulsions (HASE-thickeners) - Ase quick summary - Hase quick summary - Heur quick summary En ligne : https://drive.google.com/file/d/1EaiXbmXo3iQyIc3AfBqNn_zLLEd26gDr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28443 [article]

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