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Synthesis of TDI-Polyurethane/Polyacrylate Composite Emulsion by Solvent-free Method and Performances of the Latex Film

Authors :
Xingyuan Zhang
Rui Shi
Jiabing Dai
Source :
Journal of Macromolecular Science, Part A. 50:350-357
Publication Year :
2013
Publisher :
Informa UK Limited, 2013.

Abstract

Using the blend of methyl methacrylate (MMA) and butyl acrylate (BA) instead of acetone as a diluent, hydroxyethyl acrylate to terminate the ends of prepolymer, and emulsifying at 85°C, TDI-polyurethane/polyacrylate (TDI-PU/PA) composite emulsion was prepared using toluene diisocyanate (TDI), polypropylene glycol (PPG), 1,6-hexanediol (HDO) and dimethylol propionic acid (DMPA) on the basis of solvent-free method. The chain structure and polymerization progress were confirmed by the analysis of Fourier transform infrared spectroscopy. The desired emulsion could be synthesized when the molar ratio of NCO group in TDI to total OH groups in PPG, DMPA and HDO was 1.18, triethylamine (TEA) and water were added simultaneously during the emulsification, and acrylic monomers were initiated by potassium persulfate at 80°C. It was found that tensile strength, pendulum hardness of the latex film cast from composite emulsion increased and water resistance became better with increasing the content of MMA. Compared with...

Details

ISSN :
15205738 and 10601325
Volume :
50
Database :
OpenAIRE
Journal :
Journal of Macromolecular Science, Part A
Accession number :
edsair.doi...........6c6e109889ff0eaddf75008e16825f87