Solventless and Low-voc Architectural Coatings Formulated from Novel Latexes with Low Mft
نویسنده
چکیده
A common ideology of the coatings industry is that performance of solventless architectural coatings must be poor since they lack conventional coalescing agents. Indeed, it is well established that useful protective coatings must possess below ambient minimum film formation temperatures (MFT or MFFT) for flow, leveling, and substrate adhesion, and reach a glass transition temperature (T,) well above ambient for a useful lifetime. While the synthesis of low MFT polymers alone is a relatively simple matter, the combination of low MFT and high T3 has been elusive for'some time. ' The common problem associated with low MFT latexes is low film To anu therefore poor performance properties. To overcme this dilemma, most contemporary water-based coatings are formulated from latexes with high MFT, and consequently require co-solvents and coalescing agents to facilitate film formation such that significant VOCs are present,.
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