| Titre : |
Designed for selective adsorption : Dispersants based on core/shell structures stabilize pigments in reactive systems |
| Type de document : |
texte imprimé |
| Auteurs : |
Astrid Rudolfi, Auteur ; Marcel Krohnen, Auteur ; Frederik Piestert, Auteur ; Stefan Mößmer, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 22-26 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages.
Adsorption
Agents dispersants (chimie)
Composés aliphatiques
Composés aromatiques
Core-Shell
Encapsulation
Pigments
Polyisocyanates
Polymères ramifiés
Polyuréthanes
Revêtements -- Additifs:Peinture -- Additifs
Rhéologie
Viscosité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Dispersing additives with a hyperbranched core/shell structure have been developed with encapsulated aminic pigment-affinitive groups. These can be used in solvent-borne and solvent-free coating systems. They provide highly effective stabilisation of various types of pigment while avoiding any undesirable interactions with reactive coatings systems. |
| Note de contenu : |
- The nature of pigment dispersants
- Three structurally different additives compared
- Three different coating chemistries
- Two dispersants effectively reduce viscosity
- Gloss and transparency differences are considerable
- How structure correlates to viscosity stability
- Stoving systems shows differences in hardness
- How the hyperbranched core/shell structures function
- Table 1 : Possible interactions between the coating system and the aminic dispersing additive
- Figure 1 : Schematic representation of dispersing additives based on hyperbranched core/shell structures
- Figure 2 : Comparison of structural types of dispersants tested
- Figure 3 : Influence of the various structural types of dispersant on the viscosity of the pigment concentrates
- Figure 4 : Influence of the different structure types on the gloss of the pigmented 2-pack polyurethans system (OH-functionalised acrylate/pure aliphatic polyisocyanate)
- Figure 5 : Influenc of the different structure types on the transparency of the pigment 2-pack polyurethane system (OH-functinalised acrylate/pure aliphatic polyisocyanate), here using P.G 7
- Figure 6 : Influence of the structure types on the storage stability of the epoxy base component
- Figure 7 : Influence of the structure types on the potlife of the 2-pack polyurethane system. Left : OH-functionalised acrylate + aliphatic-aromatic polyisocyanate. Right : OH-functionalised acrylate + pure aliphatic polyisocyanate
- Figure 8 : Influence of the structure types onpendulum hardness of the acid-acatalysed stoving system
- Fibure 9 : Schematic representation of the working mechanism of the hyperbranched core/shell structures. |
| En ligne : |
https://drive.google.com/file/d/1z-sUeELKtnHaoazjvoHvoFuqDTneA1ov/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19730 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2013) . - p. 22-26
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