A new core–shell type fluorinated acrylic and siliconated polyurethane hybrid emulsion

Abstract

A novel core-shell type fluorinated acrylic and siliconated polyurethane (FSiPUA) hybrid emulsion was prepared by seeded emulsion polymerization using siliconated polyurethane (SiPU) as a seed and forming the structure with SiPU as a shell and the copolymer of butyl acrylate (BA) with 2,2,2-trifluoroethylmethacrylate (TFEMA) as a core. SiPU was synthesized using isophorone diisocyanate (IPDI), polytetramethylene ether glycol (PTMG), polypropylene glycol (PPG), dihydroxybutyl-terminated polydimethylsiloxane (PDMS), dimethylol propionic acid (DMPA), 1,6-hexanediol (HDO) and triethylamine (TEA). The contents of siloxane and fluorine were determined according to the feed ratio. Fourier transform infrared spectroscopy (FTIR) was used to identify the chain structure of SiPU and FSiPUA. Investigation of transmission electron microscopy (TEM) confirmed the core-shell structure of FSiPUA emulsion and gave the particle size at about 50 nm. The measurement results of water contact angles and the solvent absorptions in water and n-octane for cured films showed that the water and the oil repellency for FSiPUA had been improved significantly with a suitable content of fluorine and siloxane.

Preparation and surface properties of core‐shell polyacrylate latex containing fluorine and silicon in the shell

“…Comparing curve b and curve c with curve a, the new peaks at 688 cm À1 and 623 cm À1 are attributed to the stretching vibration and wagging vibrations of CAF bonds, and 1288 cm À1 is attributed to ACF 3 groups. 3 The absorption peaks at 1245 cm À1 and 1166 cm À1 become sharper and more intensified, which is resulted from the stretching vibration absorption of the CAF bond at 1100-1240 cm…”

“…1 H-NMR and 19 F-NMR spectra were recorded on a VNS-400 nuclear magnetic resonance apparatus (Varian Company), and the sample was dissolved in deuterated reagent CDCl 3 .…”

“…Qu et al 2 prepared composite particles with core-shell structure resulting from the combination of silica seed and hydrophobic copolymer by emulsion polymerization, which is useful for preparing high performance hydrophobic coating. Dai et al 3 reported a novel core-shell fluorinated acrylic and siliconated polyurethane (FSiPUA) hybrid emulsion which was synthesized by a seed emulsion polymerization. The results showed that the water and the oil repellency for FSiPUA had been improved significantly with a suitable content of fluorine and siloxane.…”

“…Further, the hydrophobicity and thermal stability of the latex films were investigated by CA and thermogravimetry analysis. 3 ), used as crosslinking reagent, was purchased from Zhongguanmei Trading Company, Guangzhou, China. Toctylphenol polyoxyethylene ether (OP-10) as nonionic emulsifier, potassium persulfate (KPS) as initiator and sodium bicarbonate (NaHCO 3 ) as buffering reagents, analytical pure, were used as received.…”

Transparent fluorinate acrylic polyurethane with hydrophobicity obtained by crosslinking of hydroxyl-containing fluoroacrylate copolymer with HDI trimer

“…Fluorinated polymers are attractive functional materials because of their excellent chemical and thermal stability [1], low surface energy [2], and low refractive index [3,4]. Fluorinated acrylic polymers, especially with fluoroalkyl side chains are used as components for high performance paint and varnish in the textile, paper, leather, construction, automotive, aerospace industry, optics, and microelectronics [5][6][7][8].…”