Titre : |
All-round gains for polyurethanes : Thiol-silane oligomer avoids limitations of amino silanes |
Type de document : |
texte imprimé |
Auteurs : |
Nayeem Soad, Auteur ; Dean Kondos, Auteur ; Dmitry Chernyshov, Auteur ; Vikram Kumar, Auteur ; Martin Wusik, Auteur |
Année de publication : |
2017 |
Article en page(s) : |
p. 90-94 |
Langues : |
Anglais (eng) |
Catégories : |
Adhésion Anticorrosifs Anticorrosion Durée de vie en pot Dureté (matériaux) Formulation (Génie chimique) Métaux -- Revêtements protecteurs Oligomères Polyuréthanes Revêtements -- Additifs:Peinture -- Additifs Revêtements bi-composant:Peinture bi-composant Silanes Thiols
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
A new low-odour oligomeric glycolic mercapto silane additive for 2K PU systems eliminates disadvantages associated with amino silanes, such as yellowing on exposure and shortened pot life. Improvements could be obtained in pot life, surface hardness, metal substrate adhesion and corrosion resistance. |
Note de contenu : |
- Avoiding the limitations of amino silanes
- Test formulations, preparation and application
- Details of the four different test coatings
- Testing carried out to standard protocols
- Adhesion and corrosion resistance markedly improved
- Pot life extended when tin catalyst is used
- Corrosion resistance and hardnesss improved
- Corrosion resistance of pigmented coatings improved
- Differences in reactions of silanes identified
- Wide range of benefits for several coating types
- FIGURES : 1. Structure of the new mercapto-silane - 2. Corrosion resistance on galvanised metals, showing improvement due to silane addition - 3. Adhesion test results ; control vs. silane addition - 4. Corrosion resistance as a function of time and silane loading - 5. Clear coat dry times as a function of silane in formulation - 6. Coating hardness as function of time and wt% mercapto-silane - 7. Corrosion resistance of pigmented coatings with and without the silane - 8. Adhesion and corrosion resistance data of a commercial system with and without the silane
- TABLES : 1. Formulations for clear coats and pigmented system - 2. Modification of commercial primer with silane |
En ligne : |
https://drive.google.com/file/d/1pagWetw7kREtdFxfDWwzjwDvGReyUd3z/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27953 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2017) . - p. 90-94