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Hydrophobically modified acrylic technology to create cellulosics coatings / Pol Storme in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4570 (03/2012)
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Titre : Hydrophobically modified acrylic technology to create cellulosics coatings Type de document : texte imprimé Auteurs : Pol Storme, Auteur Année de publication : 2012 Article en page(s) : p. 26-27 Langues : Anglais (eng) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Epaississants
Ethers cellulosiques
Hydrophobie
hydroxyéthylcellulose
Polyacryliques
Revêtements en bâtimentIndex. décimale : 667.9 Revêtements et enduits Résumé : The rheologic of coatings determines important performance properties such as roller and spray application, brush marks and dry film texture and appearance. To control these properties, coatings are formulated with a variety of rheology modifiers, sometimes also referred to as thickeners.
Two major types of rheology modifiers for aqueous coatings are those based on cellulose ethers and those based on acrylic polymers. Both types are high molecular weight, water-soluble polymers. The cellulose ethers are polysaccharides that are ethoxylated to make them water soluble whereby the most commonly used type is hydroxyethyl cellulose, or HEC. The acrylic polymers are copolymers of an acrylic acid and an acrylic ester monomer.
The radio of the two monomers is carefully chosen so that the polymer is insoluble in water at acidic pH but becomes soluble at the basic pH of aqueous coatings. Because of this property, these products are often called alkali soluble emulsion, or ASE. Unlike cellulosic ethers, which are offered as powders and must be dissolved, the acrylic polymers are offered as low viscosity, ready-to-use aqueous emulsions. It is also possible to further modify the structure of each of these types by the addition of hydrophobic groups, resulting in hydrophobically modified HEC (HMHEC) and hydrophobically modified ASE (HASE) materials. A third type of thickener, hydrophobically modified ethylene oxide-based urethane (HEUR), is also commonly used but offers rheologyquite different from that of cellulosics and so will not be included in this discussion.En ligne : https://drive.google.com/file/d/1RsOr7GaoX8ivPFuXtDk1id_LSy3w3GNr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13884
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 202, N° 4570 (03/2012) . - p. 26-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13754 - Périodique Bibliothèque principale Documentaires Disponible New generation water-based associative rheology modifiers to meet current market demands / Pol Storme in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4618 (03/2016)
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Titre : New generation water-based associative rheology modifiers to meet current market demands Type de document : texte imprimé Auteurs : Pol Storme, Auteur ; Inge De Preter, Auteur ; John J. Rabasco, Auteur ; Daniel A. Saucy, Auteur ; Tara Conley, Auteur Année de publication : 2016 Article en page(s) : p. 30-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epaississants
Hydrophobie
Polyuréthane éthoxylé modifié de façon hydrophobe
Revêtements -- Additifs:Peinture -- Additifs
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Hydrophobically modified ethylene oxide urethanes or 'HEUR' rheology modifiers provide rheology profiles offering excellent flow and levelling, good water resistance properties and efficient ways to increase the high shear application viscosity. An enhanced technology has been developed in HEUR chemistry to offer ways to produce concentrated HEUR rheology modifiers without the need for organic solvent or additives, like surfactants, to suppress the solution viscosity. This allows one to produce HEURs with low 'as supplied' viscosity for ease of handling in production.
In addition, this technology offers materials that contribute to narrow the gap in several performance areas including increased thickening efficiency and cost in use, improved balance between levelling and sag, improve applied hide and reduced viscosity loss upon tinting.Note de contenu : - HEUR acid suppression technology
- Enhanced HEUR technology offering superior viscosity resistance upon tinting and optimised SAG/levelling balance
- Enhance HEUR technology offering improved applied hiding
- Enhanced HEUR technology of MID-high builders with stable viscosity developmentEn ligne : https://drive.google.com/file/d/1B8oTIBqIc-UrC7oF5lcqi05YnQlOsSjU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25803
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4618 (03/2016) . - p. 30-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18015 - Périodique Bibliothèque principale Documentaires Disponible Versatile chemistry for improved heurs / Pol Storme in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2015)
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Titre : Versatile chemistry for improved heurs : A new generation of water-based associative rheology modifiers show performance gains Type de document : texte imprimé Auteurs : Pol Storme, Auteur ; Inge De Preter, Auteur ; John J. Rabasco, Auteur ; Daniel A. Saucy, Auteur ; Tara Conley, Auteur ; Jihui Guo, Auteur Année de publication : 2015 Article en page(s) : p. 38-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epaississants
Opacifiants
Polyuréthane éthoxylé modifié de façon hydrophobe
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : A technology termed "Acid Supression" allows efficient HEUR rheology modifiers to be supplied at high solids content, without the use of solvents or surfactants. This also allows different polymer structures to be created, which show a range of performance benefits. Note de contenu : - The problems of heur supply viscosity
- Different solutions to high supply viscosity issues
- Performance benefits of the new heurs
- Highly efficient mid-shear products
- Improved tinting and sag/levelling balance
- Hiding power improved in practical application
- Stable viscosity is attained more rapidly
- High shear viscosity obtained with less syneresis
- Aversatile technology with tailored productsEn ligne : https://drive.google.com/file/d/1GBHd0FAC_e-ouLZgdkO-FBbwweu9HJZM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24705
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2015) . - p. 38-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17518 - Périodique Bibliothèque principale Documentaires Disponible