Preparation and Properties of Two-Component and Double-Crosslinking Waterborne Polyurethane-Acrylic Dispersions

Nan Gao, Zhuo Zhang, Qingzhi Dong

East China University of Science and Technology, Shanghai, China.
East China University of Science and Technology, Shanghai, China;Shanghai Institute of Technology, Shanghai, China.
Shanghai Institute of Technology, Shanghai, China.

DOI: 10.4236/ojopm.2013.32005                

Abstract

In this paper, isophorone diisocyanate (IPDI), polyethylene glycol (PEG), dimethylolpropionic acid (DMPA) and internal crosslinking agent trimethylolpropane (TMP) were used to prepare waterborne polyurethane. And then double-crosslinked polyurethane-acrylic composite aqueous dispersion was prepared in which polyacrylate was adopted to modify waterborne polyurethane and some special external crosslinking agents were added including silicone and trifunctional aziridine. The influence of the amounts of internal and external crosslinking agents, emulsifier, initiator on the particle size, particle size distribution, viscosity, molecular weight, as well as water adsorption ratio were studied.

Keywords

Waterborne Polyurethane-Acrylic Dispersions; Two-Component; Double-Crosslinking

Conflicts of Interest

The authors declare no conflicts of interest.

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