Effect of cross-linking density on coating properties of a polyurea coating system

Polyamides were prepared from a dimer fatty acid, Methylene tetramine and diethylene triamine, and cross-linked using e-caproIactam-bIocked isophorone diisocyanate. These thermoset coatings were then evaluated for various mechanical, chemical and electrical properties. The effect of the cross-linkin...

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Bibliographic Details
Published in:Surface coatings international. Part B, Coatings transactions Coatings transactions, 2006-09, Vol.89 (3), p.221-230
Main Authors: SHENOY, M. A, D'MELO, D. J
Format: Article
Language:English
Subjects:
Applied sciences
Coatings. Paints, varnishes and inks
Exact sciences and technology
Film formation and curing, properties, testing
Polymer industry, paints, wood
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Summary:Polyamides were prepared from a dimer fatty acid, Methylene tetramine and diethylene triamine, and cross-linked using e-caproIactam-bIocked isophorone diisocyanate. These thermoset coatings were then evaluated for various mechanical, chemical and electrical properties. The effect of the cross-linking density on the coating properties was studied. It was observed that with the increase of the cross-linking density, the general toughness of the coatings increased along with chemical resistances, except for acid resistance and the breakdown voltage. However, it was observed that the flexibility and resistance to rapid deformation of the coatings (ie the rigidity of the coatings) decreased with an increase in the cross-linking density of the coating.
ISSN:1476-4865
DOI:10.1007/BF02699664