[article]
| Titre : |
Use of poly (2-vinylpyridine)-b-poly(e-caprolactone) copolymers as pigment stabilizers in powder coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
F. L. Duivenvoorde, Auteur ; K. Jansen, Auteur ; J. Laven, Auteur ; R. van der Linde, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 49-57 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Etude expérimentale Propriété mécanique optique physique Effet stérique Adsorption Stabilisant Caprolactone copolymère Dispersant Adjuvant Titane Oxyde Pigment minéral Formulation Peinture poudre Matériau revêtement |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Four poly(2-vinylpyridine)-b-poly(e-caprolactone) copolymers, differing in buoy block length and anchor/buoy block length ratio, have been used as TiO2 pigment dispersants in a polyester powder coating resin. When the TiO2 surface was fully covered with the block copolymers, the colloidal stability of the TiO2 dispersions at typical curing temperatures was significantly improved because of the formation of a steric layer around the pigment particles. As a result, powder coatings with excellent flow, high gloss, and low haze values were obtained. Because of the high affinity of the dispersants for the TiO2 surface, pretreatment of the pigments with the block copolymers was not necessary. At full pigment surface coverage, the chain length of the stabilizing polymer had little effect on the performance of the dispersants used. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5635 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 931 (08/2002) . - p. 49-57
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Use of poly (2-vinylpyridine)-b-poly(e-caprolactone) copolymers as pigment stabilizers in powder coatings in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 931 (08/2002)
