Abstract
In view of the high cost of paints as a result of importation of raw materials and the need to use our locally available raw materials for economic and industrial developments, a study was carried out for the production of emulsion house paint by supplementing imported synthetic binder (polyvinyl acetate, PVA) with a locally available binder (gum Arabic, GA) in six different proportions labelled; Sample A (100% PVA), Sample B (80% PVA: 20% GA), Sample C (60% PVA: 40% GA), Sample D (40% PVA: 60% GA), Sample E (20% PVA: 80% GA) and Sample F (100% GA). Standard emulsion paint formulation and method of production were employed. All the six samples gave high quality emulsion paints in terms of opacity, adhesion, ease of application and coverage. However, it was observed that paint brightness diminished with increased gum Arabic composition; Sample F being badly affected. Samples B to E thus resulted in quality paints without any blemish. Therefore, gum Arabic (Acacia Senegal) can be used as a supplement to PVA in emulsion paint production in all proportions investigated except Sample F.
Highlights
The terms ‘paint’ and ‘surface coating’ are often used interchangeably
Raw materials used for the production of emulsion paint were purchased from Sunny Wax International Agency, Panteka Market Kaduna, Kaduna State-Nigeria
Samples that had gum Arabic solution in their compositions had lower pH values as compared to sample A. These differences in pH values are attributed to differences in pH values of PVA and gum Arabic; PVA has a pH value of 5-6.5 [11] while gum Arabic has a pH value of 4.5-5.0 [12]; this shows that gum Arabic is slightly more acidic than PVA
Summary
The terms ‘paint’ and ‘surface coating’ are often used interchangeably. Surface coating is the more general description of any material that may be applied as a thin continuous layer to a surface. Paint was traditionally used to describe pigmented materials as distinct from clear films which are more properly called lacquers or varnishes [1]. Paint is a loosely word covering a whole variety of materials; enamels, lacquers, varnishes, undercoats, surfacers, primers, sealers, fillers, stoppers and many others. If the pigment is omitted, the material is usually called a varnish [2]. The pigmented varnish – the paint – is sometimes called an enamel, lacquer, finish or topcoat, meaning that it is the last coat to be applied and the one seen when the coated object is examined
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