Waterborne polyurethane dispersions synthesized from jatropha oil

Nanoferrite dispersed waterborne epoxy-acrylate: Anticorrosive nanocomposite coatings

Environmentally friendly waterborne polyurethane (WPU) coatings are used extensively due to their low VOCs emission than solvent based PU coatings. Additionally, WPU coatings have low temperature flexibility, pH stability, water resistance, superior solvent resistance, outstanding weathering resistance and desirable chemical and mechanical properties. This review provides an overview on the recent developments of WPU coatings and their value added applications in the coatings and paint industry. UV-cured WPU coatings provide an important class of green and ecofriendly coatings with outstanding mechanical properties and rapid curing system. Hyper-branched polyurethanes (PUs) show interesting properties, such as high solubility, reactivity and good rheological behavior owing to multiple end groups, compact molecular structure and diminishing chain entanglement. Inherently, WPU coatings have reduced stiffness and mechanical strength that can be increased by the addition of nanoparticles, like Ag, Cu, TiO2, SiO2 and many more. Fire retardants, commonly phosphorous, are incorporated in the WPU structure to increase the flame retardancy of WPU coatings.

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Recent trends in environmentally friendly water-borne polyurethane coatings: A review

Waterborne acrylic resin modified with glycidyl methacrylate (GMA): Formula optimization and property analysis

Preparation and properties of castor oil/pentaerythritol triacrylate-based UV curable waterborne polyurethane acrylate

UV-curable waterborne polyurethane-acrylate: preparation, characterization and properties

Preparation, mechanical properties and surface morphologies of waterborne fluorinated polyurethane-acrylate

Hydroxyethyl methyl acrylate (HEMA) capped waterborne polyurethane-acrylate (WPUA) oligomer was firstly prepared from isophorone diisocyanate (IPDI), polyether polyol (NJ-220), dimethylolbutanoic acid (DMBA), HEMA via in-situ and anionic self-emulsifying method. Ultraviolet (UV) curable WPUA coating was obtained from HEMA-capped oligomer, butyl acrylate (BA) and multifunctional acrylates (TPGDA) as reactive diluents, and Darocur 1173 as photoinitiator. The physical properties of WPUA oligomers, such as particle size, apparent viscosity, and surface tension were investigated. Some mechanical properties of UV-WPUA films, such as contact angles, thermal properties, and solvent (water, HCl, NaOH, NaCl, and ethanol) resistance of UV-WPUA coating films were measured. The surface morphologies were measured by scanning electron microscope and atomic force microscope. The surface free energy of the UV-cured film was calculated from contact angle measurements using the Lewis acid–base three liquids method. The specific UV-WPUA coating was selected to protect the iron materials that observed the effect of the protection. The results indicate that the prepared UV-WPUA coating has excellent protective behavior to metal iron materials and may offer some contributions to protect iron cultural relics. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3142–3152, 2013

Preparation, characterization of UV‐Curable Waterborne Polyurethane‐Acrylate and the application in metal iron surface protection

The UV-curable waterborne polyurethane acrylate (UV-WPUA) oligomer was first prepared based on isophorone diisocyanate (IPDI), polyether polyol (NJ-220), dimethylol propionic acid (DMPA), and hydroxyethyl methyl acrylate (HEMA) via an in situ method. With the different content tetraethoxysilane (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) as coupling agents, a series of waterborne UV-WPUA/SiO2 oligomers were prepared by the sol–gel process. The physical and mechanical properties of the UV-WPUA and UV-WPUA/SiO2 hybrid coating materials were measured. The UV-WPUA and WPUA/SiO2 hybrid materials were characterized using FTIR spectra, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD) measuring apparatuses to determine their structures, thermal properties, surface morphologies, etc. The results showed the SiO2 particles of the hybrid materials had wide dispersion, forming a good interfacial bonding layer on surfaces. The tensile strength, water resistance, and thermal properties of the hybrid materials were better than those of the UV-WPUA. The resulting UV-WPUA/SiO2 hybrids are promising for a number of applications, e.g., for high-performance water-based UV-curable coatings.

Preparation, characterization and properties of UV-curable waterborne polyurethane acrylate/SiO 2 coating

The waterborne polyurethane (PU) prepolymer was first prepared based on isophorone diisocyanate, polyether polyol (NJ-210), dimethylol propionic acid (DMPA), and hydroxyethyl methyl acrylate via in situ method. The crosslinked waterborne polyurethane-acrylate (PUA) dispersions were prepared with the different functional crosslinkers. The chemical structures, optical transparency, and thermal properties of PU and PUA were confirmed by Fourier transform infrared spectrometry, ultraviolet–visible spectrophotometry, and differential scanning calorimetry. Some physical properties of the aqueous dispersions such as viscosity, particle size, and surface tension were measured. Some mechanical performances and solvent resistance of PUA films were systemically investigated. The experimental results showed that the particle sizes of the crosslinked PUA aqueous dispersions were larger than the PU and increased from 57.3 to 254.4 nm. When the ratios of BA/St, BA/TPGDA, and BA/TMPTA were 70/30, PUA films exhibited excellent comprehensive mechanical properties. The tensile strength and elongation at break of the film were 2.17 MPa and 197.19%. When the ratio of BA/St was 30/70, the film had excellent water resistance and was only 6.47%. The obtained PUA composites have great potential application such as coatings, leather finishing, adhesives, sealants, plastic coatings, and wood finishes. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Yingying Wang

Papers

UV-curable waterborne polyurethane-acrylate: preparation, characterization and properties

Preparation, mechanical properties and surface morphologies of waterborne fluorinated polyurethane-acrylate

Preparation, characterization of UV‐Curable Waterborne Polyurethane‐Acrylate and the application in metal iron surface protection

Preparation, characterization and properties of UV-curable waterborne polyurethane acrylate/SiO 2 coating

Preparation, mechanical properties of waterborne polyurethane and crosslinked polyurethane‐acrylate composite