Journal
PROGRESS IN ORGANIC COATINGS
Volume 63, Issue 2, Pages 238-244Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2008.05.011
Keywords
polyurethane-acrylic; hybrid emulsion; solvent-free; polydimethylsiloxane
Funding
- National Natural Science Foundation of China [20073041]
- Anhui Provincial Education Department [2004kj362zd]
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A new type of polysiloxane modified polyurethane-acrylic hybrid emulsion was synthesized by solvent-free method and the polysiloxane was introduced into the soft segment of polyurethane chains using dihydroxybutyl-terminated polydimethylsiloxane (PDMS). The formed film from the hybrid emulsion could provide obviously higher water-resistance property. The preparation technologies such as the content of carboxy group and acrylic monomer, the rate and the time of emulsification were discussed systematically. The chain structure and the particle size were confirmed by the analysis of Fourier transform infrared spectroscopy and transmission electron microscopy, respectively. The effect of PDMS content on the water resistance and the mechanical property were investigated by absorbed water ratio, water contact angle and dynamic mechanical measurement. (C) 2008 Elsevier B.V. All rights reserved.
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