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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