Abstract
The role of coalescing agents in the film formation process is studied by means of the turbidity technique, i.e., analysis of light transmission and interference. The basic influence of coalescing agents is (a) lowering the minimum film formation temperature of the latex dispersion, (b) increasing the drying time and (c) improvement of coalescence. Application of coalescing agents also causes a change in polymer particle size as coalescing agents made of TEXANOL (2,2,4 trimethyl-1,3 pentanediol monoisobutyrate) and ethylene glycol monobutyl ether (EB) were used. Turbidity is shown to be a better method to optimize the amount of coalescing agent in a film formation process than the usual brass bar.
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Acknowledgements
The authors gratefully acknowledge the financial support of the Dutch Innovative Research Programme on Paints (IOP-Verf). The authors are also much indebted to Dr. P. Vink for his suggestion to explain the delayed drying behaviour of latices containing only 1% of EB.
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Zohrehvand, S., Nijenhuis, K.t. Film formation from monodisperse acrylic latices, part 4: the role of coalescing agents in the film formation process. Colloid Polym Sci 283, 1305–1312 (2005). https://doi.org/10.1007/s00396-005-1333-2
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DOI: https://doi.org/10.1007/s00396-005-1333-2