In this study, aqueous acrylic polyol dispersions with high stability for a two-component waterborne polyurethane were prepared. To improve the stability of acrylic dispersions, the influence of the acrylic acid (AA) addition method, neutralization, water addition rate during the dilution process, and dispersion equipment on the stability of the aqueous acrylic polyol dispersion was studied using dynamic light scattering and a thermal storage experiment. The acrylic resins’ structure was examined using Fourier transform infrared spectra, and the water resistance of the resultant films was investigated by electrochemical measurements and a water-swelling experiment. The dispersions prepared by two-step AA addition exhibited better particle size distribution, viscosity, and thermal storage compared with those prepared by one-step AA addition. Furthermore, the acrylic resin prepared by two-step AA addition was observed to possess a higher acid value. The corrosion currents of films based on dispersions prepared by two-step AA addition decreased to a smaller extent after 24 h of immersion in water. The dispersions afforded smaller particles when larger amounts of neutralizer and slower water addition rates were used. The dispersions prepared using a sawtooth disk dispersion machine displayed better performance than that prepared using a homogenizer dispersion machine.
Acrylic polyol Aqueous dispersion Stability
This is a preview of subscription content, log in to check access.
The authors would like to acknowledge the support of the Key Scientific and Technological Project of Zhejiang Province, China (Grant No. 2013C01095).
Melchiors, M, Sonntag, M, Kobusch, C, Jurgens, Eberhard, “Recent Developments in Aqueous Two-Component Polyurethane (2K-PUR) Coatings.” Prog. Org. Coat., 40 (1–4) 99–109 (2000)CrossRefGoogle Scholar
Ley, DA, Fiori, DE, Quinn, RJ, “Optimization of Acrylic Polyols for Low VOC Two-Component Water Reducible Polyurethane Coatings Using Tertiary Isocyanate Crosslinkers.” Prog. Org. Coat., 35 (1–4) 109–116 (1999)CrossRefGoogle Scholar
Huybrechts, J, Bruylants, P, Vaes, A, De Marre, A, “Surfactant Free Emulsions for Waterborne Two-Component Polyurethane Coatings.” Prog. Org. Coat., 38 (2) 67–77 (2000)CrossRefGoogle Scholar
Park, SH, Chung, D, Hartwig, A, Kima, BK, “Hydrolytic Stability and Physical Properties of Waterborne Polyurethane Based on Hydrolytically Stable Polyol.” Colloids Surf. A, 305 (1–3) 126–131 (2007)CrossRefGoogle Scholar
Ge, Z, Luo, Y, “Synthesis and Characterization of Siloxane-Modified Two-Component Waterborne Polyurethane.” Prog. Org. Coat., 76 (11) 1522–1526 (2013)CrossRefGoogle Scholar
Zhang, FA, Yu, CL, “Application of a Silicone-Modified Acrylic Emulsion in Two-Component Waterborne Polyurethane Coatings.” J. Coat. Technol. Res., 4 (3) 289–294 (2007)CrossRefGoogle Scholar
Akbarian, M, Olya, ME, Ataeefard, M, Mahdavianc, M, “The Influence of Nanosilver on Thermal and Antibacterial Properties of a 2K Waterborne Polyurethane Coating.” Prog. Org. Coat., 75 (4) 344–348 (2012)CrossRefGoogle Scholar
Billiani, J, Wilfinger, W, “New Low-VOC Acrylic Polyol Dispersions for Two-Component Polyurethane Coatings.” Surf. Coat. Int. Part B Coat. Trans., 85 (1) 191–195 (2002)CrossRefGoogle Scholar
Xinhua, Z, Weiping, T, Jianqing, H, “Preparation and Characterization of Two-component Waterborne Polyurethane Comprised of Water-soluble Acrylic Resin and HDI Biuret.” Chin. J. Chern. Eng, 14 (1) 99–104 (2006)CrossRefGoogle Scholar
Lee, H-T, Wu, S-Y, Jeng, R-J, “Effects of Sulfonated Polyol on the Properties of the Resultant Aqueous Polyurethane Dispersions.” Colloids Surf. A Physicochem. Eng. Aspects, 276 (1–3) 176–185 (2006)CrossRefGoogle Scholar
Kim, DH, Lee, YH, “Synthesis and Surface Properties of Self-crosslinking Core-Shell Acrylic Copolymer Emulsions Containing Fluorine/Silicone in the Shell.” Colloid Polym. Sci., 9 (1) 1435–1536 (2013)Google Scholar
Socrates, G, Infrared Characteristic Group Frequencies. Wiley, Great Britain, 1980Google Scholar
Lee, SK, Kim, BK, “High Solid and High Stability Waterborne Polyurethanes Via Ionic Groups in Soft Segments and Chain Termini.” J. Colloid Interface Sci., 336 (1) 208–214 (2009)CrossRefGoogle Scholar
Hunter, RJ, Zeta Potential in Colloid Science: Principles and Applications. Academic Press, London, 1981Google Scholar