polyurethane prepared with polyether only. Even with a minor content of polycarbonate diol in the polyols mixture, the improvement
in the properties of the polyurethane is noticeable. The addition of
polycarbonate diol affects more the mechanical properties and hydrolytic resistance of the polyurethane than the increase in the NCO/
OH ratio does. The better mechanical properties and higher hydrolytic resistance of the polyurethanes prepared with polycarbonate
diol can be ascribed to the particular properties of the carbonate
group leading to stronger interactions between the soft segments in
the polyurethanes and therefore favoring the miscibility between the
hard and soft segments.
Acknowledgements
Financial support of UBE Chemical Europe S.A. (Contact person in
UBE: Manuel Colera; e-mail: m.colera@ube.es) is acknowledged.
References
[1] D. Toma, W. Brandl, G. Marginean. Wear and corrosion
behaviour or thermally sprayed cermet coatings. Surface and
Coatings Technology, 138 (2-3), 149-158 (2001).
[2] R.J.K. Wood, Y. Puget, K.R. Trethewey, K. Stokes. The performance of marine coatings and pipe materials under fluid-borne sand erosion. Wear 219, 46-59 (1998).
[ 3] D.K. Chattopahyay, D.C. Webster. Thermal stability and
flame retardancy of polyurethanes. Progress in Polymer Science
34, 1068-1133 (2009).
[ 4]S. Zhou, L. Wu, J. Sun, W. Shen. The change of the properties of acrylic-based polyurethane via addition of nano-silica.
Progress in Organic Coatings, 45(1), 33-42 (2002).
[ 5] J.H. Li, R. Y. Hong, M. Y. Li, H.Z. li, Y. Zheng, J. Ding. Effects
of ZnO nanoparticles on the mechanical and antibacterial properties of polyurethane coatings. Progress in Organic Coatings
64( 4), 504-509 (2009).
[ 6] R. Zhou, D.H. Lu, Y.H. Jiang, Q.N. Li. Mechanical properties and erosion wear resistance of polyurethane matrix composites. Wear, 259(1-6), 676-683 (2005).
[ 7] H. Tanaka, M. Kunimura. Mechanical properties of thermoplastic polyurethanes containing aliphatic polycarbonate soft segments with different chemical structures. Polymer
Engineering & Science, 42( 6), 1333-1349 (2002).
[ 8] V. García-Pacios, M. Colera, Y. Iwata, J.M. Martín-Martínez.
Incidence of the polyol nature in waterborne polyurethane dispersions on their performance as coatings on stainless steel.
Progress in Organic Coatings, 76, 1726-1729 (2013).
Dr. Manuel Colera, Business Development Manager
Dr. Colera obtained his Ph.D. in Organic Chemistry from
University of Valencia (Spain). After finishing this degree, his
career was focused on developing industrial biodegradable
polymers. After joining UBE Chemical Europe in 2008, he
mainly worked in R&D for polycarbonate diol, developing an
extensive variety of new applications of ETERNACOLL®
polycarbonate diols in high-performance polyurethanes
market, as well as other UBE products, such as electrolytes,
polyamides and polyimides. Currently, he holds the position of
“Business Development Manager” of Fine Chemicals Business
Unit in UBE Chemical Europe for marketing activities and the
development of new projects with other companies.
Table 2. Values of mechanical properties of the polyurethanes before and after water immersion at 70ºC for 15 days, and percentage of variation of each property.
