| Titre : |
Effectiveness of hydroxyfunctional chain transfer agent in acrylic resins |
| Type de document : |
texte imprimé |
| Auteurs : |
Amitabha Ray Chaudhuri, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 51-56 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
Réticulant Feuil 'Propriété mécanique' physique Réticulation Durcissement 'Transfert chaîne' 'Groupe hydroxyle' fonctionnel' 'Acrylique dérivé polymère' Liant Formulation Peinture 'Matériau revêtement' |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The cross link density of a cured coating is of paramount importance for determining the ultimate performance of the coating like solvent resistance and humidity resistance. It is also the most significant factor for determination of the mechanical properties like hardness and flexibility. Recently eco-friendly norms have driven formulators towards high solid coatings which have the additional advantage of the low energy requirement. This demands a resin of low molecular weight for having a higher application solid at a sprayable viscosity. These would however create a problem for thermosetting acrylics because with decrease in molecular weight the probability of functional group(s) required for cross linking per oligomer chains is being reduced. The author of the present paper has ensured that each oligomer chain would have at least one functional group by using new chain transfer agent. The objectives were met by using chain transfer agent which itself had the functional group. A series of experiments were conducted after preparing high solid acrylic oligomers with different monomers and 2- mercapto ethanol as chain transfer agent to check for its effectiveness as molecular weight modifier and molecular weight distribution modifier. The oligomers were also evaluated in coatings with melamine resin to check the gasoline resistance property and flexibility. The author has established conclusively that it is possible to improve both the properties simultaneously using the technique discussed. |
| Note de contenu : |
- RESIN SYNTHESIS
- PROPERTIES AND CHARACTERIZATION OF RESINS
- FORMULATION OF COATINGS
- PREPARATION OF COATINGS
- EVALUATION OF COATINGS
- ANALYSIS OF COATING PROPERTIES |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12410 |
in PAINTINDIA > Vol. LII, N° 9 (09/2002) . - p. 51-56
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Effectiveness of hydroxyfunctional chain transfer agent in acrylic resins in PAINTINDIA, Vol. LII, N° 9 (09/2002)
