Design of self-dispersible charged-polymer building blocks for waterborne polyurethane dispersions

2018 ◽  
Vol 101 ◽  
pp. 324-331 ◽  
Author(s):  
I. Jiménez-Pardo ◽  
P. Sun ◽  
R.A.T.M. van Benthem ◽  
A.C.C. Esteves
Keyword(s):  
Waterborne Polyurethane ◽  
Building Blocks ◽  
Charged Polymer ◽  
Polyurethane Dispersions

Role of the interactions between carbonate groups on the phase separation and properties of waterborne polyurethane dispersions prepared with copolymers of polycarbonate diol

2015 ◽  
Vol 88 ◽  
pp. 199-211 ◽  
Author(s):  
José Antonio Jofre-Reche ◽  
Vanesa García-Pacios ◽  
Víctor Costa ◽  
Manuel Colera ◽  
José Miguel Martín-Martínez
Keyword(s):  
Phase Separation ◽  
Waterborne Polyurethane ◽  
Polycarbonate Diol ◽  
Polyurethane Dispersions

New Waterborne Polyurethane Dispersions from the Soybean-Oil-Based Polyols by Ring Opening of ESO with Glycol

2011 ◽  
Vol 197-198 ◽  
pp. 1196-1200
Author(s):  
Kun Peng Wang ◽  
Li Ting Yang
Keyword(s):  
Differential Scanning Calorimetry ◽  
Soybean Oil ◽  
Thermophysical Properties ◽  
Ring Opening ◽  
Hard Segment ◽  
Waterborne Polyurethane ◽  
Hardness Testing ◽  
Scanning Calorimetry ◽  
Hard Segment Content ◽  
Polyurethane Dispersions

A series of polyols (GSOLs) with a range of hydroxyl numbers based on epoxidized soybean oil (ESO) were prepared by ring opening with glycol. These Polyols of hydroxyl (OH) numbers ranging from 111 to 162 mg KOH/g were obtained. The environmentally friendly soybean-oil-based waterborne polyurethane dispersions (SPU) with very promising properties have been successfully synthesized from a series of soybean-oil-based polyols (GSOLs) with different hydroxyl numbers by a polyaddition reaction with toluene 2,4-diisocyanate (2,4-TDI). The structure and thermophysical properties of the resulting SPU films have been studied by Fourier transform infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and hardness testing. The experimental results showed that the functionality of the GSOLs and the hard segment content play a key role in controlling the structure and the thermophysical properties of the SPU films.

The effect of silica/polyurethane waterborne dispersion on the perforating features of impregnated polypropylene-based fabric

2019 ◽  
Vol 90 (11-12) ◽  
pp. 1201-1211 ◽  
Author(s):  
A Patti ◽  
D Acierno
Keyword(s):  
Infrared Spectroscopy ◽  
Weight Gain ◽  
Unit Area ◽  
Waterborne Polyurethane ◽  
Strength Increase ◽  
Cutting Resistance ◽  
Electron Scanning Microscopy ◽  
Dynamometer Machine ◽  
Polyurethane Dispersions ◽  
Puncture Strength

In an attempt to improve the puncturing behavior of a commercial technical textile, this study investigated the effects of fabric impregnation with waterborne polyurethane dispersions (WPUDs). The infusing solutions were prepared by mixing a commercially available WPUD with other components, such as water, hydrophilic and hydrophobic silica (SiO2) nanoparticles, and a crosslinker. Quasi-static perforation tests were performed on a dynamometer machine equipped with a spherical spike and pointed blade as piercing probes. The results showed that the polyurethane impregnation augmented the puncture performances of the treated textiles. Then, further improvements in the spike and blade strength of the impregnated fabrics were obtained by adding hydrophilic silica nanoparticles and crosslinker into WPUDs, respectively. No effect of silica functionalization (hydrophilic or hydrophobic) has been verified on the mechanical features of the respective treated samples for the tested filler contents of 3% and 5% in wt. The best fabric features (blade strength increase of +63% and puncture strength increase of +71% compared to the neat material) were obtained by combining the two additives, nano SiO2 and crosslinker, into the polyurethane. The performances of these last systems were also superior to those obtained by doubling the amount of polymeric dispersion applied to the neat materials. The discussion of the results was supported by electron scanning microscopy, infrared spectroscopy, and further measurements of the cutting resistance. Finally, the mass per unit area of the substrate for the impregnated samples was measured in order to assess weight gain due to treatment.

Impact of soft segment size on physicochemical and antimicrobial properties of waterborne polyurethane dispersions for textile applications

2019 ◽  
Vol 133 ◽  
pp. 174-179 ◽  
Author(s):  
Misbah Sultan ◽  
Rahid Masood ◽  
Ismat Bibi ◽  
Imran Sajid ◽  
Atif Islam ◽  
...  
Keyword(s):  
Soft Segment ◽  
Antimicrobial Properties ◽  
Waterborne Polyurethane ◽  
Segment Size ◽  
Polyurethane Dispersions

Water resistance of the membranes for UV curable waterborne polyurethane dispersions

2007 ◽  
Vol 59 (4) ◽  
pp. 331-336 ◽  
Author(s):  
Chen Yan Bai ◽  
Xing Yuan Zhang ◽  
Jia Bing Dai ◽  
Chu Yin Zhang
Keyword(s):  
Water Resistance ◽  
Waterborne Polyurethane ◽  
Uv Curable ◽  
Polyurethane Dispersions
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