| Titre : |
Synthesis and properties of water-dispersible polyisocyanates carrying sulfonate |
| Type de document : |
texte imprimé |
| Auteurs : |
Zhongkang Peng, Auteur ; Liuyan Tang, Auteur ; Ye Yuan, Auteur ; Jinqing Qu, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 345-359 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Dispersions et suspensions
Hydrophilie
Poids moléculaires
Polyisocyanates
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Revêtements bi-composant
Revêtements en phase aqueuse
Revêtements organiques
Stabilité au stockage
Sulfonates
Transparence (optique)
Viscosité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A series of N-alkylated aminosulfonic acids (NASAs) were synthesized with 1,4-butane sultone and primary amines and then reacted with hexamethylene diisocyanate trimer to obtain water-dispersible polyisocyanates (WDPs). Two-component waterborne polyurethane (2K-WPU) coatings were finally prepared by the reaction of WDPs and aqueous hydroxyl resins. The structures and properties of WDPs and 2K-WPU coatings were characterized. The effects of the categories and amounts of NASAs on the properties of WDPs and 2K-WPU coatings, including viscosities, water resistance and transparency, were investigated. The results showed that the average molecular weights and viscosities of the WDPs increased with the increase in the amounts and molecular weights of NASAs. 3-(Cyclohexylamino)-1-propanesulfonic acid possesses a high molecular weight, resulting in low-concentration –SO3 per mass, so a high concentration up to 3.5 wt% was needed to meet water-dispersible requirements. On the other hand, 3-isobutylamino-1-propanesulfonic acid (IBAPS) has high-concentration –SO3 per mass and only a low concentration (2.5 wt%) was required to offer satisfactory water dispersibility. 2K-WPU film cured by IBAPS-WDP displayed high gloss, good transparency and excellent water resistance owing to suitable steric hindrance and high content of –SO3H per mass. |
| Note de contenu : |
- EXPERIMENTAL : Materials - The synthesis of NASAs - The synthesis of WDPs - Preparations of 2K-WPU films - Characterization
- RESULTS AND DISCUSSION : Synthesis and structures of NASAs and WDPs - Average molecular weight and viscosities of WDPs - Water dispersibility of WDPs - Storage stability of WDPs - Properties of 2K-WPU films - Relationship between substituted group of NASAs and properties of WDPs and 2K-WPU |
| DOI : |
https://doi.org/10.1007/s11998-019-00277-4 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-019-00277-4.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33986 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 345-359
Aller sur edunet
Accueil
Synthesis and properties of water-dispersible polyisocyanates carrying sulfonate in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
