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Development of polyamide curable modified epoxy novolac resins with improved adhesion and chemical resistance

Vipin Shukla (Jaydeep Polycons Pvt Ltd, Kanpur, India)
Ravi Shukla (Jaydeep Polycons Pvt Ltd, Kanpur, India)
Dharmendra Singh (Jaydeep Polycons Pvt Ltd, Kanpur, India)
Mahendra Singh (Jaydeep Polycons Pvt Ltd, Kanpur, India)
Madhu Bajpai (Oil and Paint Department, Hurcourt Butler Technological Institute, Kanpur, India)
Sunita Seth (Oil and Paint Department, Hurcourt Butler Technological Institute, Kanpur, India)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 1 April 2005

578

Abstract

Purpose

To prepare modified epoxy resins from resorcinol, cresol and phenol for improved adhesion and chemical resistance. To evaluate the properties of such modified epoxy resins.

Design/methodology/approach

Epoxy novolac resins (ENRs) were synthesised by condensing epichlorohydrin with novolacs based on different types of substituted phenols for improving adhesion and chemical resistance. Various compositions were made by incorporating different proportions of polyamide resin. The chemical and adhesive strengths of the conventional epoxy and the modified epoxy resins were characterised.

Findings

The modified ENR using substituted phenols showed significant enhancement of chemical and adhesive strengths over the conventional DGEBA resin. The modified ENR had an increased number of glycidyl groups (thus increased functionality) of resin, which was responsible for improved chemical and adhesive strengths over the conventional DGEBA resin.

Research limitations/implications

The EPN resins used in the present context was synthesised from phenol, resorcinol and cresol and cured by polyamide resin of different amine values. Besides, it could be synthesised from phenolphthalein p‐aminophenol and p‐ter‐butylcatachol, etc.

Practical implications

The method developed provided a simple and practical solution to improving the adhesive and chemical resistance of cured epoxy phenol novolac resins.

Originality/value

The method for enhanced adhesive and chemical resistance of cured epoxy was novel and could find numerous applications in surface coating and adhesive.

Keywords

Citation

Shukla, V., Shukla, R., Singh, D., Singh, M., Bajpai, M. and Seth, S. (2005), "Development of polyamide curable modified epoxy novolac resins with improved adhesion and chemical resistance", Pigment & Resin Technology, Vol. 34 No. 2, pp. 66-71. https://doi.org/10.1108/03699420510585139

Publisher

:

Emerald Group Publishing Limited

Copyright © 2005, Emerald Group Publishing Limited

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