Abstract
A UV crosslinkable waterborne siloxane–polyurethane dispersion, PDMS-PEDA-PU, was synthesized by incorporating acrylate groups into the side chain of the polyurethane using pentaerythritol diacrylate (PEDA). Polysiloxane groups were introduced into the soft segment of the polyurethane using polydimethylsiloxane (PDMS). They formed a crosslinking structure after UV radiation. The structure of PDMS-PEDA-PU was confirmed by the use of Fourier transform infrared spectroscopy (FTIR). X-ray diffraction (XRD) analysis indicated that the formed PDMS-PEDA-PU was amorphous. The curing rule of PDMS-PEDA-PU was investigated on the basis of the change in C=C conversion during the UV curing process. The influence of the PDMS/PEDA ratio was studied with respect to the water resistance, the thermal property, and the mechanical property of the films.
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Acknowledgments
Financial support from the National Natural Science Foundation of China (No. 20073041) and Anhui Provincial Education Department (No. 2006KJ047A) are acknowledged.
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Bai, C., Zhang, X., Dai, J. et al. Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films. J Coat Technol Res 5, 251–257 (2008). https://doi.org/10.1007/s11998-007-9062-8
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DOI: https://doi.org/10.1007/s11998-007-9062-8