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Synthesis of butyl acrylate–styrene–TMI latexes and their application as water-based coatings

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Abstract

Self-crosslinking styrene-acrylic latexes functionalized with 3-isopropenyl-α,α-dimethyl benzyl isocyanate (TMI) by semibatch emulsion polymerization were prepared. Polymerizations were performed in emulsions with aerosol EF-800 surfactant; remarkable colloidal stability of the copolymer latexes was measured in fresh and aged samples. The effects on film formation, tensile properties, permeability to water vapor, and oxygen were evaluated by varying the TMI concentrations (from 0 to 6 wt%). The obtained latexes were used as binder to prepare water-based coatings, which were applied on steel specimens; hydrolysis of TMI acts as a self-crosslinked promoter once the film was applied. Adhesion tests, scratch hardness, and gloss properties were evaluated.

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Water vapor permeability of latex films

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Acknowledgments

The authors gratefully acknowledge the financial support of National Council of Science and Technology (CONACYT-México) under Grant 256727. We also thank L.C.Q. Jorge Felix Espinosa, M.C.J. Guadalupe Télles, and L.C.Q. José Luis Saucedo Morales for their assistance in the laboratory and tests tensile and L.C.Q. Guadalupe Mendez for her technical assistance with the DSC measurements.

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Correspondence to Luis E. Elizalde.

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Elizalde, L.E., Mendoza, J.J., Ledezma-Rodríguez, R. et al. Synthesis of butyl acrylate–styrene–TMI latexes and their application as water-based coatings. J Coat Technol Res 17, 911–919 (2020). https://doi.org/10.1007/s11998-020-00325-4

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