Titre : |
Dispersing pigments and fillers |
Type de document : |
texte imprimé |
Auteurs : |
Jochen Winkler |
Editeur : |
Hannover [Germany] : Vincentz Network GmbH & Co. |
Année de publication : |
2012 |
Collection : |
European Coatings Tech Files |
Importance : |
208 p. |
Présentation : |
ill. |
Format : |
23 cm |
ISBN/ISSN/EAN : |
978-3-86630-852-7 |
Prix : |
139 E |
Note générale : |
Index - Bibliogr. |
Langues : |
Français (fre) |
Catégories : |
Charges (matériaux) Dispersions et suspensions Pigments
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
The Mission: To provide a fundamental understanding and grasping of the dispersing process - the pivodal step in paint production. From wetting of the solid surface, through mechanical destruction of the pigment agglomerates to stabilisation of the resultant particles against flocculation. An indispensable basis for understanding the dispersing process as a substantiated, scientifically proven technique.
The Audience: Newcomers to the profession seeking a comprehensive grounding in the underlying physico-chemical principles as well as experts looking for more detailed information and new inspiration to grasp the complicated and seemingly confusing relationships in their entirety. All those seeking to acquire a deeper understanding of dispersing, from additive development to sophisticated millbase formulations to production optimisation.
The Value: This book brings together the substantive knowledge of the physico-chemical principles behind the three separate steps involved in dispersing. Models are developed to enable the informed user to identify problems as they arise and to quickly rectify them. As well as being provided with all the necessary theory, the reader benefits from the wealth of practical advice distilled from the author’s vast experience. |
Note de contenu : |
1. PHYSICAL INTERACTIONS OF ATOMS AND MOLECULES : Periodic table of the elements - Physical interactions - Energies and forces of attraction - Hydrogen bonds - Range of physical interaction energies - Interactions at interfaces
2. PROPERTIES OF PIGMENTS AND FILLERS : Dispersing and milling - Particle size determination - Interactions between pigment particles - Van der Waals attraction between particles - Surface treatment of pigments - Organic and inorganic pigments
3. WETTING OF PIGMENT SURFACES : Relevancy of wetting for the dispersion process - Surface tension - Young equation - Wetting of pigments - Mill base rheology and mill base optimization
4. DISPERSING EQUIPMENT : High speed impellers - Roller mills (three roll mill) - Kneaders and extruders - Bead mills (high speed attritors) - Determining dispersion time
5. MECHANICAL BREAKAGE OF AGGLOMERATES : Measuring dispersion success - Principle of mechanical brealage ; hammer-walnut experiment - Dispersion equation - Mechanical powder and dispersion results in bead mills
6. STABILIZATION AGAINST FLOCCULATION : Flocculation kinetics - Sedimentation - Potential curves - Electrostatic stabilization - Steric stabilization - Solubility parameters - Adsorption of polymers on pigment surfaces - Let-dow - Flocculation stabilization by rheology control |
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