[article]
| Titre : |
Comparative performance of water soluble lac varnishes using different alkalis |
| Type de document : |
texte imprimé |
| Auteurs : |
P. M. Patil, Auteur ; M. F. Ansari, Auteur ; K. M. Prasad, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 79-84 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Ammoniac
Borax
Laque et laquage
Métaux alcalins
Morpholine
Résistance des matériaux
Triéthanolamine
Vernis
|
| Tags : |
Laque Vernis Résistance eau éraflure impact Alkalis |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Water soluble lac varnishes were prepared using different alkalis like ammonia, borax, morpholine and triethanolamine. Surface coating properties like water resistance, scratch hardness, impact resistance, flexibility of the developed varnishes were carried out. Besides ammonia based lac varnish, films of all the varnishes failed the water resistance test for 24hrs. Impact resistance was failed while flexibility was passed for all the varnishes. Scratch hardness was recorded to be maximum (1.350 kg) for triethanolamine based vanish while it was inimum (1.250 kg) for varnish based on borax. The gloss was found to be the maximum (75 %) for varnish based on morpholine and minimum (44 %) for borax based varnish.
All the varnishes were further treated with 2 % urea on the weight of shellac to improve the water resistance property. Films of all the varnishes passed the water resistance test except borax varnish. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6936 |
in PAINTINDIA > Vol. LVIII, N° 12 (12/2008) . - p. 79-84
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