Non-isocyanate strategy for anionically stabilized water-borne polyurea dispersions and coatings
| Autor: | Shuang Ma, Cheng Chen, Rolf A. T. M. van Benthem, CE Cor Koning, RJ Rafaël Sablong |
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| Přispěvatelé: | Physical Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Polymers and Plastics
Carboxylic acid isocyanate-free 02 engineering and technology coatings dianhydrides 010402 general chemistry 01 natural sciences chemistry.chemical_compound Polymer chemistry dispersions Materials Chemistry crosslinking Polyurea chemistry.chemical_classification polyureas Organic Chemistry 021001 nanoscience & nanotechnology Isocyanate 0104 chemical sciences Monomer chemistry Polymerization Urea Particle Amine gas treating 0210 nano-technology |
| Zdroj: | Journal of Polymer Science, Part A: Polymer Chemistry, 56(10), 1078-1090. Wiley |
| ISSN: | 0887-624X |
| DOI: | 10.1002/pola.28986 |
| Popis: | An isocyanate-free strategy for the preparation of anionically stabilized water-borne polyurea (PU) dispersions was developed with diamines, dicarbamates, and dianhydrides as monomers. Poly(amic acid urea)s (PAAUs) with number average molecular weights up to 34 kDa were synthesized from ethylenediaminetetraacetic dianhydride and diamine-functional PUs. The latter were produced from polymerization of dicarbamates and diamines. The factors that affected the particle sizes of the corresponding PAAU dispersions were investigated. Water-borne PAAU coatings cured at elevated temperatures exhibited much better material properties than those cured at 50 °C as a result of crosslinking due to amine/carboxylic acid reactions and noncyclic imidization. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 |
| Databáze: | OpenAIRE |
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