UV-curable waterborne polyurethane dispersions modified with a trimethoxysilane end-capping agent and edge-hydroxylated boron nitride

2019 ◽  
Vol 16 (5) ◽  
pp. 1479-1492 ◽  
Author(s):  
Huixiang Liu ◽  
Hong Zhang ◽  
Chaohua Peng ◽  
Shufan Ren ◽  
Conghui Yuan ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Waterborne Polyurethane ◽  
Capping Agent ◽  
Uv Curable ◽  
End Capping ◽  
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

UV Curable Polyurethane Dispersions Extended by a New Chain Extender

2014 ◽  
Vol 904 ◽  
pp. 137-141
Author(s):  
Zheng Xiang Wang ◽  
Jian Long Wang ◽  
Qing Long Liu ◽  
Ji Tong Yuan ◽  
Hong Chen
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Structure ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Uv Curable ◽  
H Nmr ◽  
Branched Chains ◽  
Polyurethane Dispersions ◽  
Branched Structure

Ultraviolet (UV) curable waterborne polyurethane dispersions with comb branched structure were synthesized by prepolymer process. C=C bonds were incorporated into the branched chains of the polyurethane using chain extender, hence, the content of C=C bonds can be adjusted by the chain extender consumption. The chemical structure was identified by Fourier transform infrared spectroscopy (FTIR) and1H NMR. Effects of the chain extender content on the microstructure, rheological behavior, thermal property, mechanical and other properties of the UV cured films were researched.

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

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.

Properties of High Solid Content UV Curable Waterborne Polyurethane Dispersions with Different C=C Content

2012 ◽  
Vol 535-537 ◽  
pp. 1158-1162
Author(s):  
Yong Bin Jiu ◽  
Xin Miao Zeng ◽  
Jun Hui Ji ◽  
Yu Zhai ◽  
Lian Cai Wang
Keyword(s):  
Particle Size ◽  
Mechanical Stability ◽  
Waterborne Polyurethane ◽  
Solid Content ◽  
Effect Of Temperature ◽  
Polypropylene Glycol ◽  
High Solid Content ◽  
Uv Curable ◽  
High Solid ◽  
Polyurethane Dispersions

Ultraviolet (UV) curable waterborne polyurethane(WPU) dispersions based on isophorone diisocyanate(IPDI), polypropylene glycol(PPG), dimethylolproprionic acid(DMPA) and pentaerythritol triacrylate(PETA) were prepared by the conventional method of anionic aqueous polyurethane dispersions. The structure of the ultraviolet (UV) curable WPU dispersions was studied by FT-IR. Stability, dispersion particle size and zeta-potential of the WPU dispersions were characterized. Effect of temperature on viscosity of the dispersions with different C=C content was also investigated. Results showed that all UV curable WPU dispersions had high solid content (48wt%) and showed remarkable mechanical stability. The viscosity of the dispersions decreased with temperature increasing from 20°C to 60°C. When C=C content varied from 0 to 1.05meq/g, the dispersion particle size was under 300nm, zeta potentials were less than -48.9mV.

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

Study on the Preparation and Characterization of Carboxyl Terminated Poly(L-Lactic Acid) (PLLA) Prepolymers

2017 ◽  
Vol 872 ◽  
pp. 165-170
Author(s):  
Shi Chao Lu ◽  
Yang Chuan Ke ◽  
Qian Zhou ◽  
Zhao Rui Meng ◽  
Guo Liang Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Average Molecular Weight ◽  
Polymerization Temperature ◽  
Capping Agent ◽  
Molar Amount ◽  
Optimum Reaction ◽  
Catalyst Content ◽  
End Capping

The carboxyl terminated poly (L-lactic acid) (PLLA) prepolymers were prepared via polycondensation of L-lactic acid and 1,6-adipic acid (end capping agent) under the catalyst of stannous octoate. The effects of synthetic condition, such as reaction temperature, amount of catalyst, content of the end capping agent, etc, on the molecular weight of PLLA were discussed. Fourier transform infrared and 1H nuclear magnetic resonance were used to characterize the PLLA prepolymers. The results indicated that the polycondensation was performed under an optimum reaction condition as following: the amount of the catalyst was 500 ppm based on the mass of lactic acid, the amount of the end capping agent was 1% (the molar amount of the lactic acid), and the polymerization temperature was 170 °C. The viscosity-average molecular weight of the product reached 2.826×104 at this polymerization temperature and the yield was 73.34%.

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