Novel urethane/acrylic hybrid emulsions for VOC compliant coatings

Abstract

Purpose

The purpose of this paper is to develop a volatile organic component‐free water‐based binder with improved coating properties from urethane‐alkyd acrylate by emulsion polymerisation.

Design/methodology/approach

Alkyd resin based on interesterification of sardine fish and linseed oil (50:50 w/w) was synthesised and reacted with isophorone diisocyanate to form urethane alkyd. The resultant urethane alkyd and acrylic monomers in different ratios were polymerised by emulsion polymerisation to form air‐drying water‐based binders and studied for physicochemical and other coating properties.

Findings

Urethane alkyd, co‐polymerised with acrylates by emulsion polymerisation process, can be used to prepare water‐based air‐drying binders with excellent coating and application performance. The increase in acrylate component in the system resulted in improvement of performance properties.

Research limitations/implications

In the present study, refined fish oil (FO) was obtained from sardine fish. Different FOs can be used to produce alkyd resin. Urethane alkyd and acrylic monomers in different ratios can be polymerised by emulsion polymerisation techniques.

Practical implications

The emulsion polymerisation is the most effective technique used to produce water‐based binders with excellent coating properties.

Originality/value

Water‐based binders can be widely used in exterior coatings and waterproofing of cement and roofs.

Citation

Athawale, V.D. and Nimbalkar, R.V. (2011), "Novel urethane/acrylic hybrid emulsions for VOC compliant coatings", Pigment & Resin Technology, Vol. 40 No. 3, pp. 181-190. https://doi.org/10.1108/03699421111130450