UV-curable cationic waterborne polyurethane from CO2-polyol with excellent water resistance

Waterborne UV curable polyurethane emulision containing C=C bond was prepared with self-emulsification. 3% water soluble photoinitiator was added to the polyurethane emulision, and polyurethane films was prepared by ultraviolet irradiation. The structure of the polyurethane emulision and films were confirmed by means of Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and thermogravimetric analysis. FTIR test result shows that cross linking and solidification reaction of C=C double bond happened after UV irradiation. When C=C content increases, the particle size of polyurethane emulision increases, crosslinking degree of films increases, water resistance and heat resistance have both been improved. When C=C content is 8.51%, gel content is more than 90% and the lowest water absorption can be 12.5%.

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Curing behavior of the UV-curable cationic waterborne polyurethane acrylate adhesives

Material Science and Environmental Engineering ◽

10.1142/9789813143401_0057 ◽

2016 ◽

Author(s):

Mei ZHANG ◽

Yi-Ding MENG ◽

Hong-Wei LI ◽

Hong-Wei LI

Keyword(s):

Waterborne Polyurethane ◽

Uv Curable ◽

Curing Behavior ◽

Polyurethane Acrylate ◽

Waterborne Polyurethane Acrylate ◽

Cationic Waterborne Polyurethane

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Study on UV Curable Waterborne Polyurethane Modified by Epoxy Resin

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.249-250.842 ◽

2012 ◽

Vol 249-250 ◽

pp. 842-848 ◽

Cited By ~ 2

Author(s):

Wen Yuan Li ◽

You Ming Cao ◽

Xin Qi Zhou

Keyword(s):

Epoxy Resin ◽

Water Resistance ◽

Waterborne Polyurethane ◽

Raw Material ◽

Toluene Diisocyanate ◽

Step Method ◽

Fractional Step Method ◽

Uv Curable ◽

The Fourier Transform ◽

Different Content

In this paper, UV curable waterborne polyurethane emulsions were prepared by fractional step method using toluene diisocyanate (TDI), polyethylene glycol (PEG, MW=1000), α,α-dimethylol propionic acid (DMPA), 2-hydroxyethyl methacrylate (HEMA) as raw material, and UV-WPUs were modified with epoxy resin. The effect of different content of epoxy resin on the viscosity, the water resistance, and other properties was investigated. The synthesized polyurethane structure was confirmed by the Fourier transform infrared spectroscopy (FTIR). The FTIR analysis identified that the target product was expected epoxy modified waterborne UV polyurethane. And with –COOH content increasing, the emulsion viscosity of the WPU increased and the water absorption of the films increased; with epoxy content increasing, the viscosity of the WPU emulsion increased and the water resistance of the films was improved.

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Preparation and characterization of modified castor oil via photo‐click chemistry for UV ‐curable waterborne polyurethane with enhanced water resistance and low conductive percolation threshold

Journal of Applied Polymer Science ◽

10.1002/app.49913 ◽

2020 ◽

Vol 138 (9) ◽

pp. 49913

Author(s):

Mengwei Dai ◽

Pan Song ◽

Yong Zhang

Keyword(s):

Percolation Threshold ◽

Click Chemistry ◽

Castor Oil ◽

Water Resistance ◽

Waterborne Polyurethane ◽

Uv Curable

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The Structure and Properties of UV-Curable Cationic Waterborne Polyurethane Acrylate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1090.31 ◽

2015 ◽

Vol 1090 ◽

pp. 31-37

Author(s):

Yi Ding Meng ◽

Hong Wei Li

Keyword(s):

Soft Segment ◽

Waterborne Polyurethane ◽

Decomposition Temperature ◽

Particle Size Analysis ◽

Size Analysis ◽

Uv Curable ◽

High Elongation ◽

Polyurethane Dispersions ◽

High Degree ◽

Cationic Waterborne Polyurethane

A series of stable double-terminated UV reactive cationic waterborne polyurethane dispersions was synthesized, while the structure was confirmed by infrared spectroscopy,laser particle size analysis and free NCO root titration; modified by co-monomerhydroxyethyl acrylate with the UV radiation fast curing, the influence of hydroxyethyl acrylate proportion and the polyurethane’s nNCO/nOH(R value) to the thermal properties, mechanical properties and yellowing of the product was investigated. The investigation illustrated the UV-curable cationic waterborne polyurethaneacrylate film effectively forming a semi-interpenetrating network system to achieve rapid curing coating.The results showedthe product cured by WPU dispersion of R=1.5 mixed with equimolar HEA obtained lowyellowing, the maximum breaking strength, high elongation at break, high thermal decomposition temperature, high crystallization temperature of hard segment, low glass transition temperature of soft segment, high degree of phase separation, better overall performance.

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