| Titre : |
Film characteristics of novolac based epoxy ester films - I |
| Titre original : |
Nigerseed oil epoxy esters |
| Type de document : |
texte imprimé |
| Auteurs : |
Madhu Bajpai, Auteur ; Arti Sharma, Auteur |
| Année de publication : |
1996 |
| Article en page(s) : |
p. 27-32 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
Peinture Liant 'Epoxyde résine' Novolaque 'Corps gras végétal' Préparation 'Propriété physique' chimique' Feuil 'Résistance eau' base' 'Etude expérimentale' |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Epoxy esters were prepared from nigerseed oil fatty and novolac based epoxy resins. the novolac used for preparing the epoxy resins were prepared using different proportions of phenol and formaldehyde. The film characteristics of novolac based epoxy esters of different oil length were studied and comparison was made with the film characteristics of epoxy esters prepared from bisphenol-A based epoxy resin.
It was observed that all the films had dried within 24 hours and were tack-free the desired film forming characteristics. All the epoxy ester films passed the flexibility test on 1/4 inch mandrel. The scratch hardness of the films decreased with the increasing oil length irrespective of the phenolic source of the epoxy resin. The water resistance and alkali resistance of the epoxy ester films showed a definite pattern vis a vis the epoxy esters prepared from novolac and bisphenol-A. While the water resistance of the epoxy esters improved with the increasing oil length of the esters, yhe alkali resistance decreased with the increasing oil length. Both alkali resistance and water resistance improved with the higher proportion of formaldehyde in the novolac used as starting a material for the preparation of epoxy ester. Both the alkali and water resistance of the novolac based epoxy esters were superior to the epoxy esters based on bisphenol-A. All the epoxy ester films showed very goog acid-resistance. |
| Note de contenu : |
- Experimental : Preparation of novolac resins - Preparation of epoxy resins - Preparation of epoxy esters - Preparation of coatings - Evaluation of film characteristics
- Results and Discussion : Drying time - Scratch hardness - Flexibility - Water rsistance - Alkali resistance - Acid resistance |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13483 |
in PAINTINDIA > Vol. XLVI, N° 5 (05/1996) . - p. 27-32
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Film characteristics of novolac based epoxy ester films - I in PAINTINDIA, Vol. XLVI, N° 5 (05/1996)
