[article]
| Titre : |
Epoxy silanes in reactive polymer emulsions |
| Type de document : |
texte imprimé |
| Auteurs : |
Ming J. Chen, Auteur ; Fred D. Osterholtz, Auteur ; Antonio Chaves, Auteur ; Philbert E. Ramdatt, Auteur ; Bruce A. Waldman, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 49-55 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Epoxydes
Réticulants
Réticulation (polymérisation)
Revêtements
Revêtements -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
Silanes
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Epoxy silanes are effective additives for the crosslinking of carboxy and amino latexes and polyurethane dispersions. A series of epoxy silane additives have been evaluated in both one-pack and two-pack systems. It is found that the structure and water solubility of the epoxysilane as well as the pH of the latex determine silane stability. New water insoluble epoxy silanes achieve long-term shelf stability in emulsions yet crosslink upon application of the coating. Formulating principles, performance improvements, and catalytic cure profiles are reported. Carboxyl-modified waterborne polymer dispersions with post-added epoxy silanes provide curable coatings, in which properties such as mar, chemical and solvent resistance, adhesion, and durability are dramatically improved. In many applications, this approach is a potential candidate for crosslinkable waterborne systems free of aziridines and formaldehyde. |
| Note de contenu : |
- EXPERIMENTAL : Preparation of a 40% β-(3,4-epoxycyclohexy)ethyltriethoxysilane emulsion - Preparation of a 40% glycidoxypropylmethyldiethoxysilane emulsion - Preparation of epoxysilane/reactive emulsion polymer admixtures - Testing methods
- RESULTS AND DISCUSSION : The role of epoxysilane curing in performance improvement - Stable one-pack epoxycyclohexysilane emulsion/reactive latex system - Glycidoxy silanes for two-packs systems - Formulation principles - Wood coating applications - Time-temperature cure profile - Catalytic effects on the cure behavior - Improvement of solvent resistance in polyurethane dispersions |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18069 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 875 (12/1997) . - p. 49-55
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Epoxy silanes in reactive polymer emulsions in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 875 (12/1997)
