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Non-migratory surfactants, which allow
water to be formulated into Architectural Paints by partial or
total hydrocarbon replacement in solventborne and waterborne
formulations, have been developed. The use of these surfactants
as external emulsion stabilisers allows the preparation of low
to zero-VOC alkyd based coatings with excellent shelf life and
film quality. This paper summarises
experimental work directed towards partially and completely
replacing solvents with water for VOC reduction in alkyd based
coatings. For paint formulators, the water is added as liquid
filler, resulting in solventborne coatings with reduced VOC
levels. In addition, control over film thickness is regained and
films dry significantly faster when compared to low VOC high
solids alkyd based coatings. |
