Synthesis and characterisation of new modified anti‐corrosive polyesteramide resins by partial replacement of the ingredient source of the polybasic acid for organic surface coatings

Abstract

PurposePolymeric systems based on polyesteramides (PEA) are high performance materials, which combine the useful properties of polyester and polyamide resins, and find many applications, most importantly as protective surface coatings. The purpose of this paper is to characterise and evaluate new modified anti‐corrosive PEA resins for use in protective coating formulations.Design/methodology/approachIn the study report here, new modified PEA compositions were prepared and evaluated as vehicles for surface coating. The PEA resins were obtained by means of a condensation polymerisation reaction between phthalic anhydride (PA) and N,N‐bis‐(2‐hydroxyethyl) linseed oil fatty acid amide (HELA) as the ingredient source of the polyol used. The phthalic anhydride was partially replaced with N‐phthaloylglutamic acid NPGA as the ingredient source of the dibasic acid. The structure of the resin was confirmed by FT‐IR spectral studies. Coatings of 50±5 μm thickness were applied to the surface of glass panels and mild steel strips by means of a brush. The coating performance of the resins was evaluated using international standard test methods and involved the measurement of phyisco‐mechanical properties and chemical resistance.FindingsThe tests carried out revealed that the modified PEA based on N‐phthaloylglutamic acid (NPGA) enhanced both phyisco‐mechanical and chemical properties. Also, the resins were incorporated within primer formulations and evaluated as anti‐corrosive single coatings. The results illustrate that the introduction of N‐phthaloylglutamic acid, within the resin structure, improved the film performance and enhances the corrosion resistance performance of PEA resins.Practical implicationsThe modified PEA compounds can be used as binder in paint formulations to improve chemical, physical and corrosion resistance properties.Originality/valueModified PEA resins are cheaper and can be used to replace other more expensive binders. These modified PEA resins can compensate successfully for the presence of many the anticorrosive paint formulations and thus lower the costs. The main advantage of these binders is that they combine the properties of both polyester and polyamide resins based on nitrogenous compound, are of lower cost, and they also overcome the disadvantages of both its counterparts. Also, they can be applied in other industrial applications.

Synthesis and Characterisation of New Modified Anti-microbial Polyesteramide Resins by Partial Replacement with the Ingredient Source of The Polybasic Acid Based on Tetrabromophthalic Anhydride for Organic Surface Coatings

“…A number of polyesteramides has been developed by the reaction of linseed oil fatty amide with dicarboxylic acids/anhydrides (23,27,28) . In the present work, the newly modified anti-corrosive polyesteramides resins were obtained by partial replacement of phthalic anhydride with tetrabromophthalic anhydride as the ingredient source of the polybasic acid.…”

Polyesteramide resin from PET waste and fatty amide

“…The novelty of this paper is that it is a first approach for synthesis of polyesteramide resin by combining renewable resources and waste material. (El-Wahab et al, 2012) The use of BHETA for synthesis of polyesteramide resin helps to improve the properties of conventional resin, as the aromatic linkage of BHETA will help to improve the hardness and scratch resistance of coating. The conversion of polyesteramide resin into coating also helps for conversion of recycled product to value-added material.…”

“…On the other hand, preparation of resins from natural renewable raw materials is today's need to reduce the dependency on petroleum-based material and provide a sustainable and green solution to the coating industries (El-Wahab et al, 2012;Argyropoulos et al, 2009;Sharma and Kundu, 2008). Various seed oils are used to make different types of resin material, e.g.…”

Sustainable smart anti-corrosion coating materials derived from vegetable oil derivatives: a review

“…To improve the anti-bacterial properties, durability and anti-corrosion properties, H. Abd El-Wahab and coworkers modified polyester amine with N -phthaloyl-glutamic acid. 96 In this study, linseed oil and diethanolamine (DEA) reacted to get N , N -bis-(2-hydroxyethyl)linseed oil fatty acid amide (HELA) which was made to treat with phthalic anhydride (PA) and N -phthaloyl-glutamic acid (NPGA) (synthesised in situ ) to obtain modified resin for coating. The reported coating exhibits notable chemical resistance and anti-corrosion properties along with excellent mechanical properties.…”