Study on UV Curable Waterborne Polyurethane Modified by Epoxy Resin

2012 ◽  
Vol 249-250 ◽  
pp. 842-848 ◽  
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.

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

Preparation of UV Curable Waterborne Polyurethane and its Application in Coatings

2013 ◽  
Vol 821-822 ◽  
pp. 925-928
Author(s):  
Lei Wang ◽  
Xiao Juan Lai ◽  
Shao Yun Ma
Keyword(s):  
Electron Microscopy ◽  
Water Resistance ◽  
Waterborne Polyurethane ◽  
Water Soluble ◽  
Cross Linking ◽  
Crosslinking Degree ◽  
Uv Curable ◽  
Transmission Electron ◽  
Solidification Reaction ◽  
Test Result

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%.

Synthesis and Properties of Waterborne UV Polyurethane

2011 ◽  
Vol 311-313 ◽  
pp. 1087-1092 ◽  
Author(s):  
Xin Qi Zhou ◽  
You Ming Cao ◽  
Jun Ling Tian
Keyword(s):  
Thermal Decomposition ◽  
Particle Size ◽  
Infrared Spectroscopy ◽  
Raw Materials ◽  
Waterborne Polyurethane ◽  
Toluene Diisocyanate ◽  
Target Product ◽  
Hydroxyethyl Methacrylate ◽  
Uv Curable ◽  
Decomposition Properties

Toluene diisocyanate(TDI), polyethylene glycol(PEG), double-propionic acid(DMPA), hydroxyethyl methacrylate(HEMA) and other raw materials were used to synthesis UV-curable waterborne polyurethane, and the effect of the synthesis condition on the particle size of the emulsion was investigated in this paper. The structure of the polyurethane was identified by infrared spectroscopy (IR), thermal decomposition properties was measured through the thermogravimetric(TG). The results showed that, the target product is expected waterborne UV polyurethane by IR. With DMPA content increasing, the particle size decrease, stability and appearance of the emulsion turn better. With the mole ration of PEG/DMPA decreasing, adhesion and water absorption of the film increase. TG analysis indicates that the thermal decomposition performance of the Waterborne UV Polyurethane （WPUA） is excellent.

scholarly journals Synthesis and Characterization of Epoxy Resins-Modified Waterborne Polyurethane Emulsion

2021 ◽  
pp. 1-9
Author(s):  
Chenhan Zhuang ◽  
Weilan Xue ◽  
Zuoxiang Zeng
Keyword(s):  
Epoxy Resin ◽  
Water Resistance ◽  
Raw Materials ◽  
Waterborne Polyurethane ◽  
Polyurethane Film ◽  
Modification Method ◽  
Suitable Amount ◽  
Overall Performance ◽  
Better Than

Aqueous polyurethane emulsion was prepared with diphenylmethane diisocyanate (MDI), polybutylene adipate diol (PBA-1000) as main raw materials and 2, 2-dihydroxymethyl propionic acid (DMPA) as hydrophilic chain extender. On this basis, epoxy resin E-44 was introduced to modify the polyurethane prepolymer, and epoxy resin modified waterborne polyurethane emulsion was obtained. In order to obtain better performance waterborne polyurethane, the effect of DMPA content、the amount of epoxy resin added and modification method on the properties of polyurethane was discussed. The results show that when the DMPA content is 4wt%, the overall performance of the emulsion and the film is the best. And the addition of epoxy resin significantly improves the water resistance, solvent resistance and tensile strength of the waterborne polyurethane film, and its hardness and thermal stability are also improved to a certain extent. When the amount of epoxy resin added is 8wt%, the storage stability decreases significantly, the suitable amount of epoxy resin added is 6wt%. The overall performance of the film obtained by chemical modification is better than that of physical modification.

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

Polymer ◽  
2021 ◽  
Vol 218 ◽  
pp. 123536
Author(s):  
Runan Gong ◽  
Han Cao ◽  
Hongming Zhang ◽  
Lijun Qiao ◽  
Xianhong Wang
Keyword(s):  
Water Resistance ◽  
Waterborne Polyurethane ◽  
Uv Curable ◽  
Cationic Waterborne Polyurethane

scholarly journals Bio-Based Polyurethane Networks Derived from Liquefied Sawdust

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3138
Author(s):  
Kamila Gosz ◽  
Agnieszka Tercjak ◽  
Adam Olszewski ◽  
Józef Haponiuk ◽  
Łukasz Piszczyk
Keyword(s):  
Biomass Conversion ◽  
Structural Features ◽  
Mechanical Analysis ◽  
Process Efficiency ◽  
Hydroxyl Number ◽  
Step Method ◽  
One Step ◽  
Liquefaction Process ◽  
The Fourier Transform ◽  
Liquefaction Temperature

The utilization of forestry waste resources in the production of polyurethane resins is a promising green alternative to the use of unsustainable resources. Liquefaction of wood-based biomass gives polyols with properties depending on the reagents used. In this article, the liquefaction of forestry wastes, including sawdust, in solvents such as glycerol and polyethylene glycol was investigated. The liquefaction process was carried out at temperatures of 120, 150, and 170 °C. The resulting bio-polyols were analyzed for process efficiency, hydroxyl number, water content, viscosity, and structural features using the Fourier transform infrared spectroscopy (FTIR). The optimum liquefaction temperature was 150 °C and the time of 6 h. Comprehensive analysis of polyol properties shows high biomass conversion and hydroxyl number in the range of 238–815 mg KOH/g. This may indicate that bio-polyols may be used as a potential substitute for petrochemical polyols. During polyurethane synthesis, materials with more than 80 wt% of bio-polyol were obtained. The materials were obtained by a one-step method by hot-pressing for 15 min at 100 °C and a pressure of 5 MPa with an NCO:OH ratio of 1:1 and 1.2:1. Dynamical-mechanical analysis (DMA) showed a high modulus of elasticity in the range of 62–839 MPa which depends on the reaction conditions.

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

2021 ◽  
Vol 154 ◽  
pp. 106156
Author(s):  
Lucas Dall Agnol ◽  
Fernanda Trindade Gonzalez Dias ◽  
Heitor Luiz Ornaghi ◽  
Marco Sangermano ◽  
Otávio Bianchi
Keyword(s):  
State Of The Art ◽  
Waterborne Polyurethane ◽  
Uv Curable ◽  
Polyurethane Coatings ◽  
Recent Advances
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