[article]
| Titre : |
Synthesis and evaluation of acrylate modified polyurethane dispersion by semibatch emulsion polymerization technique |
| Type de document : |
texte imprimé |
| Auteurs : |
Vilas D. Athawale, Auteur ; Mona A. Kulkardi, Auteur |
| Année de publication : |
2009 |
| Article en page(s) : |
p. 85-98 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dispersions et suspensions
Polymérisation en émulsion
Polyuréthanes
Résines acryliques
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Polyurethanes dispersions (PUDs) have been an active area of research since the early 1940s because of legislative restrictions on the use of organic solvents in conventional solvent-based products. However, PUDs are not a direct plug-in for the solvent-based polyurethanes. One of the drawbacks of PUDs is their relatively higher cost. To compensate for the higher cost and to improve the property/performance, the PUDs are blended with other low cost acrylic emulsions. Aqueous polyurethane acrylic hybrid emulsion was prepared by emulsion polymerization of a mixture of acrylic monomers (butyl acrylate, styrene, and acrylic acid) in the presence of polyurethane dispersion and characterized by using infrared spectroscopy, particle size analyzer, differential scanning calorimetry and hardness testers. It was found that the thermal resistance, chemical resistance, hardness, glass transition temperature can be noticeably increased by acrylate incorporation in PU matrix. The morphology of hybrid dispersion was well defined and properly controlled by latex composition and compatibility of both phases. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6261 |
in PAINTINDIA > Vol. LIX, N° 7 (07/2009) . - p. 85-98
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