A new class of non-isocyanate urethane methacrylates for the urethane latexes

Publication date: 27 January 2017
Source:Polymer, Volume 109
Author(s): Lei Meng, Xiaojiang Wang, Martin Ocepek, Mark D. Soucek
A series of new urethane methacrylate (UMA) monomers were synthesized with the reaction of ethylene carbonate and aliphatic amines, followed by the reaction with methacrylic anhydride. The monomers were characterized by ¹H, ¹³C nuclear magnetic resonance (NMR), mass (MS), and Fourier transform infrared (FTIR) spectroscopies. Urethane latexes were prepared by monomer-starved semibatch polymerization of the new urethane methacrylates with methyl methacrylate (MMA) and butyl acrylate (BA). A uniform morphology and a unimodal particle distribution were observed by a combination of dynamic light scattering (DLS), ultrasound acoustic attenuation spectroscopy (UAAS), and transmission electron microscopy (TEM). The thermal stability, minimum film formation temperature (MFFT) and thermo-mechanical properties of the urethane latexes were also studied. The inclusion of urethane monomers appeared to have lowered the MFFT via a water plasticization effect, while enhancing the Tg of the final film properties.

Graphical abstract

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